/* ============================================================
   PALETTE — source de vérité unique
   Les noms sémantiques des études de cas sont des ALIAS :
   changer une couleur de marque ici la change partout.
   ============================================================ */
:root {
  --ink: #0b0d10;
  --paper: #f2f2f0;
  --muted: #7a8290;
  --faint: #242932;

  --c1: #28e6ff;
  --c2: #9f6eff;
  --c3: #2fffb4;
  --c4: #f968a7;
  --c5: #ffea4d;

  /* alias sémantiques (études de cas) */
  --shift: var(--c1);
  --world: var(--c2);
  --c-green: var(--c3);
  --c-pink: var(--c4);
  --lesson: var(--c5);

  /* accents globaux, redéfinis localement par les composants */
  --accent: var(--c5);
  --sc: var(--c1);
}

/* Source: article_1_relation_paradigme_v2.html */
@view-transition {
  navigation: auto;
}
::view-transition-old(site-nav),
::view-transition-new(site-nav) {
  animation: none;
}
::view-transition-group(site-nav) {
  z-index: 1000;
}
/* ── HERO ── */
@keyframes scrollLine {
  0%,
  100% {
    transform: scaleY(0);
    transform-origin: top;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
  }
}

/* ── ARTICLE ── */
/* Encadrés paradigmes */
.paradigms {
  margin: clamp(44px, 7vh, 56px) 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
}
.paradigm {
  padding: 24px 28px;
  background: var(--ink);
  transition: background 0.4s ease;
}
.paradigm:hover {
  background: #12161d;
}
.paradigm-era {
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.paradigm-name {
  font-family: "Instrument Serif", serif;
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--paper);
  margin-bottom: 8px;
}
.paradigm-def {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.65;
}
.paradigm-last {
  background: color-mix(in srgb, var(--accent) 10%, var(--ink));
}
.paradigm-last:hover {
  background: color-mix(in srgb, var(--accent) 15%, var(--ink));
}
.paradigm-last .paradigm-era {
  color: color-mix(in srgb, var(--accent) 70%, var(--muted));
}
.paradigm-last .paradigm-name {
  color: var(--accent);
}
.paradigm-last .paradigm-def {
  color: #c9ced6;
}

/* Séparateur */
/* Conclusion */
/* Navigation série */
/* Source: article_2_trois_disciplines_v2.html */
/* Portrait des 3 disciplines */
.disciplines {
  margin: clamp(44px, 7vh, 56px) 0;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
}
@media (max-width: 720px) {
  .disciplines {
    grid-template-columns: 1fr;
  }
}
.discipline {
  padding: 26px 22px;
  background: var(--ink);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.discipline-color {
  width: 28px;
  height: 3px;
  border-radius: 2px;
  background: var(--accent);
}
.discipline-name {
  font-family: "Instrument Serif", serif;
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--paper);
  line-height: 1.2;
}
.discipline-what {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.6;
}
.discipline-hidden {
  font-size: 0.78rem;
  font-style: italic;
  color: #9aa2ae;
  line-height: 1.55;
  padding-top: 10px;
  border-top: 1px solid var(--faint);
}

/* Le territoire commun — encadré sombre relief */
.liminal-box {
  background: #10141a;
  border: 1px solid var(--faint);
  border-radius: 3px;
  padding: clamp(32px, 4.5vw, 44px);
  margin: clamp(44px, 7vh, 56px) 0;
  text-align: center;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.05),
    0 0 60px -16px color-mix(in srgb, var(--accent) 22%, transparent);
}
.liminal-box-label {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}
.liminal-box-title {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.7rem, 3vw, 2.1rem);
  font-weight: 400;
  color: var(--accent);
  margin-bottom: 16px;
  line-height: 1.2;
}
.liminal-box-def {
  font-size: 0.92rem;
  color: #b4bac4;
  line-height: 1.7;
  max-width: 460px;
  margin: 0 auto 32px;
}
.liminal-phases {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1px;
  margin-top: 24px;
  background: var(--faint);
  border: 1px solid var(--faint);
}
@media (max-width: 600px) {
  .liminal-phases {
    grid-template-columns: 1fr;
  }
}
.liminal-phase {
  padding: 18px;
  background: var(--ink);
}
.liminal-phase-name {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--paper);
  margin-bottom: 5px;
  letter-spacing: 0.04em;
  font-family: "Instrument Serif", serif;
}
.liminal-phase-def {
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.5;
}

/* Correspondances */
.correspondances {
  margin: clamp(44px, 7vh, 56px) 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
}
.correspondance {
  display: grid;
  grid-template-columns: 1fr 24px 1fr;
  gap: 16px;
  align-items: center;
  padding: 20px 24px;
  background: var(--ink);
}
@media (max-width: 600px) {
  .correspondance {
    grid-template-columns: 1fr;
    gap: 8px;
    text-align: center;
  }
}
.correspondance-left {
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.5;
  text-align: right;
}
@media (max-width: 600px) {
  .correspondance-left {
    text-align: center;
  }
}
.correspondance-left strong {
  color: var(--paper);
  font-weight: 400;
  display: block;
  margin-bottom: 2px;
}
.correspondance-arrow {
  text-align: center;
  color: var(--accent);
  font-size: 0.9rem;
}
.correspondance-right {
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.5;
}
.correspondance-right strong {
  color: var(--accent);
  font-weight: 400;
  display: block;
  margin-bottom: 2px;
}

/* Source: article_3_metaliminalite_v2.html */
/* Définition — encadré relief */
.definition {
  background: #10141a;
  border: 1px solid var(--faint);
  border-radius: 3px;
  padding: clamp(32px, 4.5vw, 44px);
  margin: clamp(44px, 7vh, 56px) 0;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.05),
    0 0 60px -16px color-mix(in srgb, var(--accent) 22%, transparent);
}
.definition-label {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}
.definition-word {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.9rem, 3.4vw, 2.4rem);
  font-weight: 400;
  color: var(--accent);
  margin-bottom: 18px;
  line-height: 1.15;
}
.definition-text {
  font-size: 0.95rem;
  color: #b4bac4;
  line-height: 1.75;
}

/* Conditions numérotées */
.conditions {
  margin: clamp(44px, 7vh, 56px) 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
}
.condition {
  padding: 26px 28px;
  background: var(--ink);
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 20px;
  align-items: baseline;
}
.condition-num {
  grid-row: span 2;
  font-family: "Instrument Serif", serif;
  font-size: 1.6rem;
  color: var(--accent);
  line-height: 1;
  opacity: 0.6;
}
.condition-title {
  grid-column: 2;
  font-family: "Instrument Serif", serif;
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--paper);
}
.condition-body {
  grid-column: 2;
  margin-top: 8px;
  font-size: 0.86rem;
  color: var(--muted);
  line-height: 1.65;
}

/* Adossement (appui philo) + Relieur : encadrés discrets */
.adossement,
.maieuticien-box {
  background: #10141a;
  border: 1px solid var(--faint);
  border-left: 2px solid var(--accent);
  border-radius: 3px;
  padding: clamp(26px, 3.5vw, 36px);
  margin: clamp(44px, 7vh, 56px) 0;
}
.adossement-label,
.maieuticien-label {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}
.adossement-name,
.maieuticien-title {
  font-family: "Instrument Serif", serif;
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--accent);
  margin-bottom: 14px;
  line-height: 1.25;
}
.maieuticien-body {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.75;
}

/* Source: article_4_cercle_reciprocites_v2.html */
/* Les 4 phases du cercle */
.phases {
  margin: clamp(44px, 7vh, 56px) 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
}
.phase {
  padding: 28px;
  background: var(--ink);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: start;
  --pc: var(--accent);
}
.phase-num {
  font-family: "Instrument Serif", serif;
  font-size: 1.8rem;
  color: var(--pc);
  line-height: 1;
  opacity: 0.6;
}
.phase-label {
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}
.phase-name {
  font-family: "Instrument Serif", serif;
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--paper);
  margin-bottom: 12px;
  line-height: 1.2;
}
.phase-desc {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 14px;
}
.phase-seuil {
  font-size: 0.82rem;
  font-style: italic;
  color: var(--pc);
  line-height: 1.5;
  padding-top: 12px;
  border-top: 1px solid var(--faint);
}
/* chaque phase sa nuance (progression du spectre) */
.phase-blue {
  --pc: var(--c1);
}
.phase-violet {
  --pc: var(--c2);
}
.phase-green {
  --pc: var(--c3);
}
.phase-rust {
  --pc: var(--c4);
}

/* Le commun — encadré relief */
.commun-box {
  background: #10141a;
  border: 1px solid var(--faint);
  border-radius: 3px;
  padding: clamp(32px, 4.5vw, 44px);
  margin: clamp(44px, 7vh, 56px) 0;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.05),
    0 0 60px -16px color-mix(in srgb, var(--accent) 22%, transparent);
}
.commun-label {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}
.commun-title {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.6rem, 2.8vw, 2rem);
  font-weight: 400;
  color: var(--accent);
  margin-bottom: 16px;
  line-height: 1.2;
}
.commun-body {
  font-size: 0.92rem;
  color: #b4bac4;
  line-height: 1.75;
}

/* Source: article_5_relation_paradigme_v2.html */
h1,
h2,
h3,
h4 {
  font-family: "Instrument Serif", Georgia, serif;
  font-weight: 400;
  line-height: 1.1;
}

.hero {
              overflow: hidden;
  border-bottom: 1px solid var(--faint);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      ellipse 55% 70% at 88% 8%,
      color-mix(in srgb, var(--accent) 16%, transparent) 0%,
      transparent 58%
    ),
    radial-gradient(
      ellipse 35% 55% at 5% 92%,
      rgba(255, 255, 255, 0.04) 0%,
      transparent 55%
    );
}
.hero-series {
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: clamp(32px, 6vh, 48px);
  position: relative;
}
.hero-series span {
  color: var(--accent);
}
.hero-title {
  font-family: "Instrument Serif", serif;
  font-size: clamp(2.6rem, 6.2vw, 5.2rem);
  font-weight: 400;
  color: var(--paper);
  line-height: 1.06;
  letter-spacing: -0.015em;
  max-width: 20ch;
  position: relative;
  margin-bottom: clamp(24px, 4vh, 34px);
}
.hero-title em {
  font-style: italic;
  color: var(--accent);
}
.hero-sub {
  font-size: clamp(15px, 1.5vw, 17px);
  color: #b4bac4;
  line-height: 1.7;
  max-width: 52ch;
  position: relative;
  margin-bottom: clamp(44px, 7vh, 64px);
}
.hero-meta {
  display: flex;
  gap: clamp(18px, 3vw, 32px);
  align-items: center;
  position: relative;
  flex-wrap: wrap;
}
.hero-meta-item {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.hero-meta-sep {
  width: 1px;
  height: 18px;
  background: var(--faint);
}
.scroll-hint {
  position: absolute;
  bottom: 34px;
  right: clamp(24px, 10vw, 120px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0.4;
}
.scroll-hint span {
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  writing-mode: vertical-rl;
}
.scroll-line {
  width: 1px;
  height: 46px;
  background: var(--accent);
  animation: scrollLine 2s ease-in-out infinite;
}

.article {
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(70px, 12vh, 110px) 24px clamp(90px, 14vh, 120px);
}
.chapeau {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.3rem, 2.2vw, 1.55rem);
  font-style: italic;
  color: #c9ced6;
  line-height: 1.55;
  margin-bottom: clamp(44px, 7vh, 56px);
  padding-bottom: clamp(44px, 7vh, 56px);
  border-bottom: 1px solid var(--faint);
}
.article p {
  font-size: 1.06rem;
  line-height: 1.85;
  color: var(--muted);
  margin-bottom: 28px;
}
.article p strong {
  color: var(--paper);
  font-weight: 400;
}
.section-title {
  font-size: clamp(1.7rem, 3vw, 2.1rem);
  color: var(--paper);
  line-height: 1.2;
  margin-top: clamp(56px, 9vh, 76px);
  margin-bottom: 26px;
}
.pull-quote {
  margin: clamp(44px, 7vh, 56px) 0;
  padding-left: 28px;
  border-left: 2px solid var(--accent);
}
.pull-quote p {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.35rem, 2.6vw, 1.6rem);
  font-style: italic;
  color: var(--paper);
  line-height: 1.45;
  margin-bottom: 0;
}
.pull-quote cite {
  display: block;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 14px;
  font-style: normal;
}
.sep {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: clamp(44px, 7vh, 56px) 0;
}
.sep-line {
  flex: 1;
  height: 1px;
  background: var(--faint);
}
.sep-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.conclusion {
  background: #10141a;
  border: 1px solid var(--faint);
  border-radius: 3px;
  padding: clamp(36px, 5vw, 52px);
  margin-top: clamp(56px, 9vh, 76px);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.05),
    0 0 60px -14px color-mix(in srgb, var(--accent) 20%, transparent);
}
.conclusion p {
  color: var(--muted);
  margin-bottom: 22px;
}
.conclusion p:last-child {
  margin-bottom: 0;
}
.conclusion strong {
  color: var(--paper);
  font-weight: 400;
}
.conclusion-title {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.4rem, 2.6vw, 1.7rem);
  font-style: italic;
  color: var(--paper);
  line-height: 1.35;
  margin-bottom: 24px;
}
.serie-nav {
  margin-top: clamp(64px, 10vh, 80px);
  padding-top: clamp(40px, 6vh, 48px);
  border-top: 1px solid var(--faint);
}
.serie-nav-label {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 22px;
}
.serie-articles {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.serie-articles > *:nth-child(1) {
  --sc: var(--c1);
}
.serie-articles > *:nth-child(2) {
  --sc: var(--c2);
}
.serie-articles > *:nth-child(3) {
  --sc: var(--c3);
}
.serie-articles > *:nth-child(4) {
  --sc: var(--c4);
}
.serie-articles > *:nth-child(5) {
  --sc: var(--c5);
}
a.serie-article:hover {
  padding-left: 12px;
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--sc) 8%, transparent),
    transparent 90%
  );
}
a.serie-article:hover .serie-num {
  color: var(--sc);
}
a.serie-article:hover .serie-article-title {
  color: #fff;
}
.serie-article.current {
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--sc) 9%, transparent),
    transparent 88%
  );
  padding-left: 12px;
}
.serie-article.current .serie-article-title {
  color: var(--paper);
}
.serie-article.current .serie-num {
  color: var(--sc);
}

.serie-article {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 15px 10px 15px 4px;
  border-bottom: 1px solid var(--faint);
  text-decoration: none;
  color: inherit;
  transition:
    padding-left 0.35s ease,
    background 0.35s ease;
}
.serie-article:last-child {
  border-bottom: none;
}
.serie-num {
  font-family: "Instrument Serif", serif;
  font-size: 1rem;
  color: var(--muted);
  flex-shrink: 0;
  width: 22px;
  transition: color 0.35s ease;
}
.serie-article-title {
  font-size: 0.92rem;
  font-weight: 400;
  color: #c9ced6;
  margin-bottom: 3px;
  transition: color 0.35s ease;
}
.serie-article-sub {
  font-size: 0.8rem;
  color: var(--muted);
  font-style: italic;
  line-height: 1.4;
}

/* Synthèse — progression des articles */
.synthese {
  margin: clamp(44px, 7vh, 56px) 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
}
.synthese-row {
  display: grid;
  grid-template-columns: 1fr 28px 1fr;
  gap: 16px;
  align-items: center;
  padding: 20px 24px;
  background: var(--ink);
}
@media (max-width: 600px) {
  .synthese-row {
    grid-template-columns: 1fr;
    gap: 8px;
    text-align: center;
  }
}
.synthese-left {
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.5;
  text-align: right;
}
@media (max-width: 600px) {
  .synthese-left {
    text-align: center;
  }
}
.synthese-arrow {
  text-align: center;
  color: var(--accent);
  font-size: 0.9rem;
}
.synthese-right {
  font-size: 0.84rem;
  color: var(--paper);
  line-height: 1.5;
}
.synthese-title {
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  color: var(--accent);
  display: block;
  margin-bottom: 2px;
}

/* Ce que ça change — items numérotés */
.changes {
  margin: clamp(44px, 7vh, 56px) 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
}
.change-item {
  padding: 26px 28px;
  background: var(--ink);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 22px;
  align-items: start;
}
.change-icon {
  font-family: "Instrument Serif", serif;
  font-size: 1.6rem;
  color: var(--accent);
  line-height: 1;
  opacity: 0.6;
}
.change-title {
  font-family: "Instrument Serif", serif;
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--paper);
  margin-bottom: 8px;
}
.change-body {
  font-size: 0.86rem;
  color: var(--muted);
  line-height: 1.65;
}

/* Coda finale — encadré relief */
.coda {
  background: #10141a;
  border: 1px solid var(--faint);
  border-radius: 3px;
  padding: clamp(36px, 5vw, 52px);
  margin-top: clamp(56px, 9vh, 76px);
  text-align: center;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.05),
    0 0 70px -14px color-mix(in srgb, var(--accent) 24%, transparent);
}
.coda-title {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  font-style: italic;
  color: var(--accent);
  line-height: 1.3;
  margin-bottom: 20px;
}
.coda-body {
  font-size: 0.95rem;
  color: #b4bac4;
  line-height: 1.75;
  max-width: 52ch;
  margin: 0 auto 24px;
}
.coda-sign {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Source: cas-axa.html */
/* ============ STRATE 1 — SURFACE ============ */
/* ============ STRATE 2 — LE RÉSUMÉ ============ */
/* ============ STRATE 3 — LE DÉTAIL ============ */
.toc a:hover {
  color: var(--paper);
}
.toc a.active {
  color: var(--paper);
}
/* chaque chapitre porte sa couleur */
.notes {
  margin-top: clamp(50px, 8vh, 90px);
  border-top: 1px solid var(--faint);
  padding-top: 44px;
}
.notes .eyebrow {
  margin-bottom: 32px;
}
.notes .cols {
  columns: 2;
  column-gap: clamp(28px, 4vw, 60px);
  max-width: 94ch;
}
@media (max-width: 760px) {
  .notes .cols {
    columns: 1;
  }
}
.notes .item {
  break-inside: avoid;
  margin-bottom: 32px;
  padding-left: 16px;
  border-left: 1px solid var(--faint);
}
.notes .item h5 {
  font-family: "Inter", sans-serif;
  font-weight: 500;
  font-size: 14px;
  margin-bottom: 7px;
}
.notes .item p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.7;
}
/* Source: cas-bi-solution.html */
/* ============ STRATE 1 ============ */
/* ============ STRATE 2 ============ */
/* ============ STRATE 3 ============ */
.duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
  margin: 40px 0;
}
@media (max-width: 640px) {
  .duo {
    grid-template-columns: 1fr;
  }
}
.duo > div {
  background: var(--ink);
  padding: clamp(24px, 3vw, 36px);
}
.duo .k {
  font-family: "Instrument Serif", serif;
  font-size: 22px;
  color: var(--accent);
  margin-bottom: 14px;
}
.duo p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  max-width: none;
}

/* Source: cas-proshop.html */
/* ============ STRATE 1 ============ */
/* ============ STRATE 2 ============ */
/* ============ STRATE 3 ============ */
.deliverables {
  margin-top: 40px;
  border-top: 1px solid var(--faint);
}
.deliverables li {
  list-style: none;
  padding: 14px 0;
  border-bottom: 1px solid var(--faint);
  font-size: 14.5px;
  color: var(--muted);
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 14px;
}
.deliverables li span {
  color: var(--accent);
  font-family: "Instrument Serif", serif;
  font-size: 13px;
}

.lesson + .lesson {
  margin-top: clamp(70px, 11vh, 130px);
  border-top: 1px solid var(--faint);
  padding-top: clamp(50px, 7vh, 80px);
}
.scope {
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 24px;
}
/* Source: cas-shift-prime.html */
h1,
h2,
h3,
.serif {
  font-family: "Instrument Serif", Georgia, serif;
  font-weight: 400;
  line-height: 1.1;
}
/* ============ STRATE 1 — SURFACE ============ */
.s1 {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 16vh 0 10vh;
}
.s1 h1 {
  font-size: clamp(30px, 4vw, 54px);
  letter-spacing: -0.01em;
  margin-bottom: 26px;
  line-height: 1.05;
}
.s1 h1 em {
  font-style: normal;
  color: var(--shift);
}
.s1 .question {
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: clamp(30px, 4.6vw, 62px);
  line-height: 1.2;
  max-width: 22ch;
  margin: clamp(40px, 6vh, 68px) 0 40px;
  color: var(--paper);
}
.s1 .context {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 60ch;
}
.facts {
  margin-top: 0;
  border-top: 1px solid var(--faint);
  padding-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(24px, 4vw, 56px);
}
.facts dt {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 7px;
}
.facts dd {
  font-size: 14.5px;
  color: var(--paper);
  font-weight: 400;
}
.bascule {
  margin-top: clamp(48px, 7vh, 80px);
  font-family: "Instrument Serif", serif;
  font-size: clamp(19px, 2.4vw, 28px);
  line-height: 1.4;
  color: var(--muted);
  max-width: 36ch;
}
.bascule span {
  color: var(--shift);
  font-style: italic;
}

/* ============ STRATE 2 — LE RÉSUMÉ ============ */
.s2 {
  padding: clamp(70px, 11vh, 130px) 0 clamp(30px, 5vh, 60px);
}
.summary {
  border-top: 1px solid var(--faint);
}
.row {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: clamp(16px, 3vw, 44px);
  align-items: start;
  padding: clamp(22px, 3vw, 34px) 0;
  border-bottom: 1px solid var(--faint);
  text-decoration: none;
  color: inherit;
  transition: none;
}
.row .num {
  font-family: "Instrument Serif", serif;
  font-size: 17px;
  color: var(--muted);
  padding-top: 3px;
  transition: color 0.35s ease;
}
.row .txt .t {
  font-size: clamp(17px, 2vw, 22px);
  font-family: "Instrument Serif", serif;
  line-height: 1.3;
  margin-bottom: 9px;
  max-width: 36ch;
  color: #c9ced6;
  transition: color 0.35s ease;
}
.row .txt .d {
  font-size: 14.5px;
  color: var(--muted);
  max-width: 72ch;
  line-height: 1.65;
  transition: color 0.35s ease;
}
.row:hover .txt .t {
  color: #ffffff;
}
.row:hover .txt .d {
  color: #a8b0bc;
}
.row:nth-of-type(1):hover .num {
  color: var(--shift);
}
.row:nth-of-type(2):hover .num {
  color: var(--world);
}
.row:nth-of-type(3):hover .num {
  color: var(--c-green);
}
.row:nth-of-type(4):hover .num {
  color: var(--c-pink);
}
.row:nth-of-type(5):hover .num {
  color: var(--shift);
}
.row:nth-of-type(6):hover .num {
  color: var(--lesson);
}
@media (max-width: 700px) {
  .row {
    grid-template-columns: 34px 1fr;
  }
}

/* ============ STRATE 3 — LE DÉTAIL ============ */
.s3 {
  position: relative;
  padding-top: clamp(60px, 9vh, 110px);
}
.s3 .intro {
  margin-bottom: clamp(50px, 8vh, 90px);
}
.s3 .intro h2 {
  font-size: clamp(26px, 3.4vw, 40px);
}
.detail-grid {
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: clamp(40px, 6vw, 90px);
  align-items: start;
}
@media (max-width: 960px) {
  .detail-grid {
    grid-template-columns: 1fr;
  }
}
.toc {
  position: sticky;
  top: calc(50vh - 90px);
  display: flex;
  flex-direction: column;
  gap: 15px;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.toc a {
  color: var(--muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 11px;
  transition: color 0.35s ease;
}
.toc a .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--faint);
  flex: none;
  transition:
    background 0.35s ease,
    transform 0.35s ease;
}
.toc a:hover,
.toc a.active {
  color: var(--paper);
}
.toc a.active .dot {
  transform: scale(1.7);
}
.toc a:nth-of-type(1).active .dot {
  background: var(--shift);
}
.toc a:nth-of-type(2).active .dot {
  background: var(--world);
}
.toc a:nth-of-type(3).active .dot {
  background: var(--c-green);
}
.toc a:nth-of-type(4).active .dot {
  background: var(--c-pink);
}
.toc a:nth-of-type(5).active .dot {
  background: var(--shift);
}
.toc a:nth-of-type(6).active .dot {
  background: var(--c-pink);
}
.toc a:nth-of-type(7).active .dot {
  background: var(--lesson);
}
@media (max-width: 960px) {
  .toc {
    display: none;
  }
}

#c1 {
  --accent: var(--shift);
}
#c2 {
  --accent: var(--world);
}
#c3 {
  --accent: var(--c-green);
}
#c4 {
  --accent: var(--c-pink);
}
#c5 {
  --accent: var(--shift);
}
#c6 {
  --accent: var(--lesson);
}
#c7 {
  --accent: var(--c-pink);
}

.chapter {
  padding: 0 0 clamp(60px, 9vh, 100px);
  scroll-margin-top: 80px;
}
.chapter .eyebrow {
  margin-bottom: 20px;
  border-left: 2px solid var(--accent);
  padding-left: 12px;
}
.chapter h3 {
  font-size: clamp(25px, 3.2vw, 38px);
  max-width: 22ch;
  margin-bottom: 26px;
}
.chapter p {
  max-width: 66ch;
}
.chapter p + p {
  margin-top: 20px;
}
.chapter .quiet {
  color: var(--muted);
}
.brief {
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: clamp(19px, 2.4vw, 27px);
  line-height: 1.4;
  color: var(--accent);
  margin: 36px 0;
  max-width: 32ch;
  padding-left: 26px;
  border-left: 2px solid var(--accent);
}
.pull {
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: clamp(21px, 2.9vw, 34px);
  line-height: 1.35;
  color: var(--accent);
  margin: 44px 0;
  max-width: 32ch;
  padding-left: 26px;
  border-left: 2px solid var(--accent);
}
.figure {
  margin: 44px 0 16px;
  background: #fff;
  padding: clamp(14px, 2.4vw, 32px);
}
.figure img {
  width: 100%;
  height: auto;
  display: block;
}
.figcap {
  font-size: 12.5px;
  color: var(--muted);
  max-width: 62ch;
  border-left: 2px solid var(--accent);
  padding-left: 14px;
}
.legend {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(24px, 4vw, 48px);
  margin-top: 8px;
}
.legend > div {
  border-left: 2px solid var(--accent);
  padding-left: 16px;
}
.legend .lt {
  display: block;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 10px;
}
.legend p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.7;
  max-width: none;
}

.ba {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(20px, 3vw, 40px);
  margin: 44px 0 40px;
}
@media (max-width: 700px) {
  .ba {
    grid-template-columns: 1fr;
  }
}
.ba figure {
  margin: 0;
}
.ba .figure {
  margin: 0;
}
.ba figcaption {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.65;
  margin-top: 16px;
  border-left: 2px solid var(--accent);
  padding-left: 14px;
}
.ba figcaption .lt {
  display: block;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 8px;
}

.defs {
  margin: 40px 0;
  border-top: 1px solid var(--faint);
}
.defs > div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: clamp(14px, 2.5vw, 32px);
  padding: 18px 0;
  border-bottom: 1px solid var(--faint);
}
@media (max-width: 600px) {
  .defs > div {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}
.defs dt {
  font-family: "Instrument Serif", serif;
  font-size: 18px;
  color: var(--accent);
}
.defs dd {
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.7;
}
.nodes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
  margin-top: 36px;
}
.node {
  background: var(--ink);
  padding: clamp(22px, 2.6vw, 30px);
  min-height: 250px;
}
.node .n {
  font-family: "Instrument Serif", serif;
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 15px;
}
.node h4 {
  font-family: "Inter", sans-serif;
  font-weight: 500;
  font-size: 15px;
  line-height: 1.4;
  margin-bottom: 10px;
}
.node p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.65;
}

/* chiffres */
.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
  margin: 44px 0 20px;
}
.metric {
  background: var(--ink);
  padding: clamp(26px, 3vw, 38px);
}
.metric .v {
  font-family: "Instrument Serif", serif;
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.metric .l {
  font-size: 13px;
  color: var(--muted);
  margin-top: 14px;
  line-height: 1.5;
}
.metrics.big {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.metrics.big .v {
  font-size: clamp(42px, 6vw, 78px);
}

/* rupture finale */
.ancrage {
  --accent: var(--lesson);
  border-top: 1px solid var(--faint);
  padding: clamp(90px, 15vh, 180px) 0 clamp(80px, 12vh, 140px);
}
.ancrage .eyebrow {
  border-left: 2px solid var(--accent);
  padding-left: 12px;
  margin-bottom: clamp(40px, 6vh, 70px);
}
.ancrage blockquote {
  font-family: "Instrument Serif", serif;
  font-size: clamp(27px, 4.4vw, 58px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  max-width: 26ch;
}
.ancrage blockquote span {
  color: var(--accent);
  font-style: italic;
}
.ancrage blockquote.second {
  margin-top: clamp(28px, 4vh, 48px);
  color: var(--muted);
}
.ancrage-body {
  margin-top: clamp(44px, 6vh, 72px);
  max-width: 66ch;
}
.ancrage-body p {
  font-size: 15.5px;
  color: var(--muted);
  line-height: 1.8;
}
.ancrage-body p + p {
  margin-top: 22px;
}

footer {
    margin-top: clamp(60px, 9vh, 100px);
              }
/* Source: etudes de cas.html */
h1,
h2 {
  font-family: "Instrument Serif", Georgia, serif;
  font-weight: 400;
  line-height: 1.1;
}
/* ---------- en-tête ---------- */
header {
  padding: clamp(90px, 18vh, 190px) 0 clamp(50px, 8vh, 90px);
}
header h1 {
  font-size: clamp(34px, 5.4vw, 72px);
  letter-spacing: -0.02em;
  max-width: 20ch;
}
header h1 em {
  font-style: italic;
  color: var(--c1);
}
header .sub {
  margin-top: clamp(30px, 4.4vh, 46px);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--paper);
  max-width: 64ch;
}

/* ---------- liste ---------- */
.cases {
  border-top: 1px solid var(--faint);
  margin: 0 calc(-1 * clamp(16px, 2.4vw, 34px));
}

.case {
  display: block;
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid var(--faint);
  padding: clamp(30px, 4.6vh, 52px) clamp(16px, 2.4vw, 34px);
  position: relative;
  isolation: isolate;
}
/* le fond qui s'allume, au rythme du trait */
.case::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, var(--accent) 0%, transparent 92%);
  opacity: 0;
  transition: opacity 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.case:hover::before {
  opacity: 0.07;
}

/* la question, en tête */
.q {
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: clamp(17px, 2.1vw, 26px);
  line-height: 1.4;
  color: #9aa2ae;
  max-width: 44ch;
  margin-bottom: clamp(16px, 2.4vh, 26px);
  transition: color 0.5s ease;
}
.case:hover .q {
  color: var(--accent);
}

/* la relation : deux termes de même poids, et le lien entre eux */
.rel {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: clamp(10px, 1.6vw, 20px);
  font-family: "Instrument Serif", serif;
  font-size: clamp(23px, 3.6vw, 46px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: #c5cad3;
  transition: color 0.5s ease;
}
.case:hover .rel {
  color: #ffffff;
}
.term {
  position: relative;
  white-space: nowrap;
}

.tie {
  position: relative;
  width: clamp(40px, 9vw, 150px);
  height: 1px;
  background: var(--faint);
  flex: none;
}
.tie::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  height: 1px;
  width: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.case:hover .tie::after {
  transform: scaleX(1);
}
.tie::before {
  content: "";
  position: absolute;
  left: -3px;
  top: -2.5px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--faint);
  transition: background 0.5s ease 0.1s;
}
.case:hover .tie::before {
  background: var(--accent);
}
.dot-end {
  position: absolute;
  right: -3px;
  top: -2.5px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--faint);
  transition: background 0.4s ease;
}
.case:hover .dot-end {
  background: var(--accent);
  transition-delay: 0.55s;
}

.meta {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  margin-top: clamp(14px, 2vh, 22px);
}
.meta b {
  color: #b9bfc9;
  font-weight: 500;
}

/* le cas à venir */
.case.soon {
  pointer-events: none;
}
.case.soon .rel {
  color: #454c57;
}
.case.soon .q {
  color: #4a515c;
}
.case.soon .meta {
  color: #3e444e;
}

/* apparition */
/* Source: index.html */
.wrap {
        position: relative;
  z-index: 2;
}
#bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
}
.veil {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(
    ellipse 90% 60% at 50% 0%,
    transparent 45%,
    rgba(11, 13, 16, 0.55) 100%
  );
}

.nav {
  position: relative;
  z-index: 3;
          }
.brand .role-nav {
  color: var(--muted);
  font-size: 14px;
}
@media (max-width: 560px) {
  .brand .role-nav {
    display: none;
  }
}
.navlinks {
  display: flex;
  gap: clamp(16px, 2.6vw, 34px);
}
.navlinks a {
  text-decoration: none;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.05em;
  transition: color 0.4s;
}
.navlinks a:hover {
  color: var(--paper);
}
@media (max-width: 720px) {
  .navlinks {
    display: none;
  }
}

.hero {
    z-index: 2;
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  }
.wrap > .hero h1 {
  max-width: 32ch;
}
.hero h1 em {
  font-style: italic;
  background: linear-gradient(
    90deg,
    var(--c2),
    var(--c1),
    var(--c3),
    var(--c5),
    var(--c4),
    var(--c2)
  );
  background-size: 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: hue 11s linear infinite;
}
@keyframes hue {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 300% 50%;
  }
}
.hero .bascule {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  color: var(--paper);
  margin: clamp(50px, 8vh, 90px) 0 clamp(34px, 5vh, 48px);
  line-height: 1.25;
}

.skills {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
@media (max-width: 820px) {
  .skills {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 460px) {
  .skills {
    grid-template-columns: 1fr;
  }
}
.skill {
  border: 1px solid var(--faint);
  border-radius: 3px;
  padding: 22px 22px 24px;
  background: rgba(16, 20, 26, 0.5);
  backdrop-filter: blur(2px);
  transition:
    border-color 0.5s,
    transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1),
    background 0.5s;
  color: var(--sk);
}
.skill:hover {
  transform: translateY(-4px);
  border-color: var(--sk);
  background: rgba(18, 22, 29, 0.8);
}
.skill .sk-ico {
  width: 40px;
  height: 40px;
  color: var(--sk);
  margin-bottom: 16px;
}
.skill .sk-name {
  font-family: "Instrument Serif", serif;
  font-size: 1.12rem;
  color: var(--paper);
  line-height: 1.15;
  margin-bottom: 7px;
}
.skill .sk-def {
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.5;
}
.skill.k1 {
  --sk: var(--c1);
}
.skill.k2 {
  --sk: var(--c2);
}
.skill.k3 {
  --sk: var(--c4);
}
.skill.k4 {
  --sk: var(--c5);
}

.hzone {
  position: relative;
  margin: clamp(56px, 10vh, 120px) 0 clamp(20px, 3vh, 28px);
}
/* ===== bloc symptômes (proto intégré) ===== */
.sympt {
  margin: clamp(56px, 9vh, 110px) 0 clamp(30px, 4vh, 40px);
}
/* ===== punchline (cercle) ===== */
.pl-scene {
  position: relative;
  width: 100%;
  min-height: clamp(720px, 98vh, 1060px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: clamp(80px, 10vh, 120px) 6vw;
  text-align: center;
  background: #0b0d10;
}

/* "Et maintenant…" : démarre au niveau de la marge existante, le disque est repoussé d'autant en dessous */
.pl-lead {
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: 2.2rem;
  color: #fff;
  text-shadow:
    0 0 30px rgba(255, 255, 255, 0.35),
    0 0 60px rgba(255, 255, 255, 0.15);
  margin-bottom: clamp(120px, 10vh, 120px);
}

/* le grand disque central : tout tient dedans — silhouette liquide qui ondule en continu, glow attaché directement dessus */
.pl-disc {
  position: relative;
  width: clamp(420px, 92vmin, 860px);
  aspect-ratio: 1/1;
  border-radius: 50%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: clamp(64px, 10vmin, 112px) clamp(42px, 7vmin, 70px);
  background: #0b0d10;
  isolation: isolate;
  transition: box-shadow 1s ease;
  animation:
    pl-liquid 10s ease-in-out infinite,
    pl-glowDim 4.6s ease-in-out infinite;
}
.pl-scene.revealed .pl-disc {
  animation: pl-liquid 10s ease-in-out infinite;
  box-shadow: none;
}
@keyframes pl-liquid {
  0%,
  100% {
    border-radius: 50%;
  }
  20% {
    border-radius: 46% 54% 61% 39% / 43% 46% 54% 57%;
  }
  40% {
    border-radius: 59% 41% 44% 56% / 52% 58% 42% 48%;
  }
  60% {
    border-radius: 41% 59% 52% 48% / 58% 40% 60% 42%;
  }
  80% {
    border-radius: 53% 47% 39% 61% / 46% 55% 45% 54%;
  }
}
@keyframes pl-discPulse {
  0% {
    transform: scale(1);
  }
  30% {
    transform: scale(1.045);
  }
  100% {
    transform: scale(1);
  }
}

/* glow porté directement par le disque : chaque couleur décalée à sa propre position autour de l'anneau, à 80% d'opacité */
@keyframes pl-glowDim {
  0%,
  100% {
    box-shadow:
      26px 0 36px 2px color-mix(in srgb, var(--c1) 80%, transparent),
      8px 25px 36px 2px color-mix(in srgb, var(--c2) 80%, transparent),
      -21px 15px 36px 2px color-mix(in srgb, var(--c3) 80%, transparent),
      -21px -15px 36px 2px color-mix(in srgb, var(--c4) 80%, transparent),
      8px -25px 36px 2px color-mix(in srgb, var(--c5) 80%, transparent);
  }
  50% {
    box-shadow:
      30px 0 44px 4px color-mix(in srgb, var(--c1) 80%, transparent),
      9px 29px 44px 4px color-mix(in srgb, var(--c2) 80%, transparent),
      -24px 18px 44px 4px color-mix(in srgb, var(--c3) 80%, transparent),
      -24px -18px 44px 4px color-mix(in srgb, var(--c4) 80%, transparent),
      9px -29px 44px 4px color-mix(in srgb, var(--c5) 80%, transparent);
  }
}
@keyframes pl-glowBright {
  0% {
    box-shadow:
      30px 0 44px 4px color-mix(in srgb, var(--c1) 80%, transparent),
      9px 29px 44px 4px color-mix(in srgb, var(--c2) 80%, transparent),
      -24px 18px 44px 4px color-mix(in srgb, var(--c3) 80%, transparent),
      -24px -18px 44px 4px color-mix(in srgb, var(--c4) 80%, transparent),
      9px -29px 44px 4px color-mix(in srgb, var(--c5) 80%, transparent);
  }
  40% {
    box-shadow:
      44px 0 64px 10px color-mix(in srgb, var(--c1) 80%, transparent),
      13px 42px 64px 10px color-mix(in srgb, var(--c2) 80%, transparent),
      -35px 26px 64px 10px color-mix(in srgb, var(--c3) 80%, transparent),
      -35px -26px 64px 10px color-mix(in srgb, var(--c4) 80%, transparent),
      13px -42px 64px 10px color-mix(in srgb, var(--c5) 80%, transparent);
  }
  100% {
    box-shadow: 0 0 0 0 transparent;
  }
}
/* le sursaut du clic garde la lueur un instant, puis elle s'efface une fois le disque plein de couleurs */
.pl-scene.flashing .pl-disc {
  animation:
    pl-liquid 10s ease-in-out infinite,
    pl-glowBright 0.9s ease-out forwards,
    pl-discPulse 0.7s ease-out;
}

/* le spectre coloré, uniquement visible à l'intérieur une fois révélé */
.pl-bg-base {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: #c9b8f0;
  opacity: 0;
  transition: opacity 1.2s ease;
}
.pl-bg-spectre {
  position: absolute;
  width: 180%;
  height: 180%;
  left: 50%;
  top: 50%;
  margin-left: -90%;
  margin-top: -90%;
  z-index: 0;
  pointer-events: none;
  background: conic-gradient(
    from 0deg at 50% 50%,
    var(--c1),
    var(--c2),
    var(--c3),
    var(--c4),
    var(--c5),
    var(--c1)
  );
  opacity: 0;
  filter: blur(46px) saturate(1.05);
  animation: pl-spin 28s linear infinite;
  transition: opacity 1.2s ease;
}
.pl-scene.revealed .pl-bg-base {
  opacity: 0.8;
}
.pl-scene.revealed .pl-bg-spectre {
  opacity: 1;
}
@keyframes pl-spin {
  from {
    transform: rotate(0);
  }
  to {
    transform: rotate(360deg);
  }
}

.pl-content {
  position: relative;
  z-index: 8;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  width: 100%;
  gap: 0;
}
.pl-line1 {
  flex: 1;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: clamp(20px, 3.6vmin, 40px);
}
.pl-line1 {
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: clamp(1.9rem, 5.4vmin, 3.3rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: #fff;
  max-width: 22ch;
  text-shadow:
    0 0 30px rgba(255, 255, 255, 0.35),
    0 0 60px rgba(255, 255, 255, 0.15);
  transition:
    color 0.8s,
    text-shadow 0.8s;
}
.pl-scene.revealed .pl-line1 {
  color: #2b2440;
  text-shadow: 0 1px 12px rgba(255, 255, 255, 0.5);
}

.pl-logo-block {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.pl-logo {
  position: relative;
  width: clamp(74px, 11vmin, 124px);
  cursor: pointer;
  animation: pl-logoPulse 1.8s ease-in-out infinite;
}
.pl-logo::before {
  content: "";
  position: absolute;
  inset: -8%;
  z-index: 0;
  border-radius: 50%;
  pointer-events: none;
  background: conic-gradient(
    from 0deg,
    var(--c1),
    var(--c2),
    var(--c3),
    var(--c5),
    var(--c4),
    var(--c1)
  );
  filter: blur(24px);
  opacity: 0.4;
  transition: opacity 0.55s ease-in-out;
  animation: pl-haloPulse 1.8s ease-in-out infinite;
}
@keyframes pl-haloPulse {
  0%,
  100% {
    transform: scale(0.96);
  }
  50% {
    transform: scale(1.05);
  }
}
.pl-logo:hover::before {
  opacity: 0.62;
}
.pl-scene.revealed .pl-logo::before {
  opacity: 0;
}
.pl-logo img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
}
.pl-logo .pl-empty {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.7s ease;
}
.pl-logo .pl-full {
  position: relative;
  opacity: 1;
  transition: opacity 0.7s ease;
}
@keyframes pl-logoPulse {
  0%,
  100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-6px) scale(1.03);
  }
}
.pl-scene.revealed .pl-logo .pl-full {
  opacity: 0;
}
.pl-scene.revealed .pl-logo .pl-empty {
  opacity: 1;
}

.pl-cursor-hand {
  position: absolute;
  right: 10%;
  bottom: 14%;
  width: clamp(22px, 3.1vmin, 30px);
  pointer-events: none;
  z-index: 2;
  animation: pl-handTap 1.8s ease-in-out infinite;
  filter: drop-shadow(0 3px 6px rgba(0, 0, 0, 0.4));
  transition: opacity 0.4s;
}
.pl-cursor-hand svg {
  width: 100%;
  height: auto;
  display: block;
}
@keyframes pl-handTap {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(5px);
  }
}
.pl-scene.revealed .pl-cursor-hand {
  opacity: 0;
}

.pl-line2-wrap {
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: clamp(20px, 3.6vmin, 40px);
}
.pl-line2 {
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: clamp(1.9rem, 5.4vmin, 3.3rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  max-width: 28ch;
  color: #2b2440;
  text-shadow: 0 1px 12px rgba(255, 255, 255, 0.5);
  opacity: 0;
  transform: translateY(20px);
}
.pl-scene.revealed .pl-line2 {
  animation: pl-l2in 0.9s cubic-bezier(0.2, 0.9, 0.3, 1.05) 0.2s forwards;
}
@keyframes pl-l2in {
  0% {
    opacity: 0;
    transform: translateY(20px);
  }
  100% {
    opacity: 1;
    transform: none;
  }
}

.pl-burst {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 60px;
  height: 60px;
  transform: translate(-50%, -50%) scale(0);
  z-index: 9;
  pointer-events: none;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    var(--c1),
    var(--c2),
    var(--c3),
    var(--c5),
    var(--c4),
    var(--c1)
  );
  filter: blur(30px);
  opacity: 0;
}
.pl-scene.flashing .pl-burst {
  animation: pl-burst 1.6s cubic-bezier(0.15, 0.7, 0.25, 1) forwards;
}
.pl-scene.flashing .pl-burst2 {
  animation: pl-burst2 1.6s cubic-bezier(0.15, 0.7, 0.25, 1) 0.18s forwards;
}
@keyframes pl-burst {
  0% {
    transform: translate(-50%, -50%) scale(0.3);
    opacity: 1;
  }
  50% {
    opacity: 0.9;
  }
  100% {
    transform: translate(-50%, -50%) scale(22);
    opacity: 0;
  }
}
@keyframes pl-burst2 {
  0% {
    transform: translate(-50%, -50%) scale(0.2);
    opacity: 0.85;
  }
  55% {
    opacity: 0.55;
  }
  100% {
    transform: translate(-50%, -50%) scale(17);
    opacity: 0;
  }
}
.pl-flash {
  position: absolute;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  opacity: 0;
  border-radius: 50%;
  background: radial-gradient(
    circle at 50% 52%,
    #fff,
    rgba(255, 255, 255, 0.5) 25%,
    transparent 60%
  );
}
.pl-scene.flashing .pl-flash {
  animation: pl-flash 0.7s ease-out;
}
@keyframes pl-flash {
  0% {
    opacity: 0;
  }
  18% {
    opacity: 0.55;
  }
  100% {
    opacity: 0;
  }
}
.stage {
  position: relative;
  width: 100vw;
  left: 50%;
  transform: translateX(-50%);
  overflow: hidden;
  --sc: #28e6ff;
  background: #ff0000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 190px;
  text-align: center;
  padding: 100px 40px 50px;
}

/* FOND : glisse et change selon le volet */
.bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.bg.solid {
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--sc) 70%, transparent),
    color-mix(in srgb, var(--sc) 40%, transparent)
  );
}
.bg .spectre {
  position: absolute;
  width: 250vmax;
  height: 250vmax;
  left: 50%;
  top: 50%;
  margin-left: -125vmax;
  margin-top: -125vmax;
  background: conic-gradient(
    from 0deg at 50% 50%,
    var(--c1),
    var(--c2),
    var(--c3),
    var(--c4),
    var(--c5),
    var(--c1)
  );
  opacity: 0.7;
  filter: blur(60px);
  animation: spin 28s linear infinite;
}
@keyframes spin {
  from {
    transform: rotate(0);
  }
  to {
    transform: rotate(360deg);
  }
}
.stage:not(.is-meta) .bg .spectre {
  display: none;
}
.stage.is-meta .bg {
  background: transparent;
}

/* CONTENU */
.titre {
  position: relative;
  z-index: 1;
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: 2.2rem;
  color: var(--ink);
}
.constat-row {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 4vw, 60px);
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
}
.constat {
  position: relative;
  font-family: "Instrument Serif", serif;
  font-size: 1.9rem;
  line-height: 1.3;
  max-width: 34ch;
  margin: 0 auto;
  color: var(--ink);
  height: calc(1.3em * 4);
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-arrow {
  background: none;
  border: none;
  cursor: pointer;
  flex: none;
  font-family: "Instrument Serif", serif;
  font-size: clamp(2.6rem, 5vw, 3.8rem);
  line-height: 1;
  color: var(--ink);
  opacity: 0.4;
  transition:
    opacity 0.2s,
    transform 0.2s;
  padding: 0 6px;
}
.nav-arrow:hover {
  opacity: 0.95;
  transform: scale(1.15);
}

/* la piste qui glisse : titre + constat (le fond glisse via .bg séparément) */
.slider {
  position: relative;
  z-index: 1;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 190px;
  will-change: transform, opacity;
}

.btn {
  position: relative;
  z-index: 5;
  overflow: hidden;
  --px: 50%;
  --py: 50%;
  --tiltx: 0;
  --tilty: 0;
  background: rgba(255, 255, 255, 0.18);
  -webkit-backdrop-filter: blur(6px) saturate(158%);
  backdrop-filter: blur(6px) saturate(158%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 999px;
  box-shadow:
    0 12px 34px rgba(0, 0, 0, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.7);
  color: var(--ink);
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: 1.9rem;
  padding: 14px 46px;
  min-width: 230px;
  cursor: pointer;
  transform: perspective(650px) rotateX(calc(var(--tiltx) * 1deg))
    rotateY(calc(var(--tilty) * 1deg));
  transition: transform 0.18s ease;
}
.btn-holo {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: url("grain.png");
  background-size: 600% 600%;
  background-position: var(--px) var(--py);
  opacity: 0.62;
  mix-blend-mode: screen;
  transition: background-position 0.25s ease;
}
.btn-label {
  position: relative;
  z-index: 2;
  color: var(--ink);
}

.btn-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 70px;
}
.nav-dots {
  position: relative;
  z-index: 5;
  display: flex;
  gap: 14px;
  align-items: center;
  justify-content: center;
}
.nav-dots button {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  padding: 0;
  background: var(--ink);
  opacity: 0.25;
  transition:
    opacity 0.25s,
    transform 0.25s;
}
.nav-dots button:hover {
  opacity: 0.55;
}
.nav-dots button.active {
  opacity: 0.85;
  transform: scale(1.35);
}

/* CARTE HYPOTHÈSE : centrée sur la rangée du constat */
.sticker {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 4;
  --spx: 50%;
  --spy: 50%;
  transform: translate(-50%, -50%) scale(0.6);
  width: clamp(440px, 46vw, 560px);
  height: clamp(280px, 26vw, 340px);
  border-radius: var(--blob, 50%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: clamp(30px, 3.5vw, 46px);
  background: rgba(255, 255, 255, 0.18);
  -webkit-backdrop-filter: blur(4px) saturate(158%);
  backdrop-filter: blur(4px) saturate(158%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.85);
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.3s ease,
    transform 0.45s cubic-bezier(0.2, 0.9, 0.3, 1.1);
}
.sticker::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: url("grain.png");
  background-size: 600% 600%;
  background-position: var(--spx) var(--spy);
  opacity: 0.5;
  mix-blend-mode: screen;
  transition: background-position 0.25s ease;
}
.stage.revealed .sticker {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, -50%) scale(1);
  transition:
    opacity 0.3s ease,
    transform 0.5s cubic-bezier(0.2, 0.9, 0.3, 1.1);
}
.rainbow {
  position: absolute;
  top: -20%;
  bottom: -20%;
  left: -45%;
  width: 40%;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(
    100deg,
    transparent,
    var(--c1) 14%,
    var(--c2) 34%,
    var(--c3) 52%,
    var(--c5) 70%,
    var(--c4) 88%,
    transparent
  );
  filter: blur(6px);
  transform: skewX(-14deg);
  opacity: 0;
  mix-blend-mode: screen;
}
.stage.revealed .rainbow {
  animation: sweep 1s cubic-bezier(0.6, 0, 0.2, 1) 0.05s 1;
}
@keyframes sweep {
  0% {
    left: -45%;
    opacity: 0;
  }
  12% {
    opacity: 1;
  }
  88% {
    opacity: 1;
  }
  100% {
    left: 120%;
    opacity: 0;
  }
}
.hypo {
  font-family: "Instrument Serif", serif;
  font-size: 1.9rem;
  line-height: 1.3;
  color: var(--ink);
  position: relative;
  z-index: 3;
  max-width: 24ch;
  opacity: 0;
  transition: opacity 0.2s ease;
  text-shadow: 0 1px 10px rgba(255, 255, 255, 0.6);
}
.stage.revealed .hypo {
  opacity: 1;
  transition: opacity 0.3s ease 0.45s;
}
.wave-wrap {
  position: relative;
}
.wave {
  display: block;
  width: 100%;
  height: 96px;
  cursor: crosshair;
}
.hz-legend {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(20px, 3.5vw, 48px);
  margin-top: -8px;
}
.hz {
  text-align: left;
}
.hz-head {
  display: flex;
  align-items: center;
  gap: 12px;
}
.hz-ic {
  width: 30px;
  height: 30px;
  flex: none;
}
.hz .st {
  font-size: 16px;
  color: var(--paper);
}
.hz .ss {
  font-size: 16px;
  color: var(--muted);
  margin-top: 3px;
  padding-left: 42px;
}
@media (max-width: 620px) {
  .hz-legend {
    grid-template-columns: 1fr 1fr;
    gap: 18px;
  }
}

section {
  position: relative;
  z-index: 2;
}
.band {
  padding: clamp(60px, 10vh, 120px) 0;
  border-top: 1px solid var(--faint);
}
.band .eyebrow {
  margin-bottom: clamp(22px, 4vh, 34px);
}
.band h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.7rem);
  max-width: 24ch;
  letter-spacing: -0.015em;
  margin-bottom: clamp(26px, 4.5vh, 44px);
}
.band h2 em {
  font-style: italic;
  color: var(--c1);
}
.bascule-h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.7rem);
  max-width: 24ch;
  letter-spacing: -0.015em;
  margin: 0 0 clamp(30px, 5vh, 48px);
}
.band .intro {
  font-size: clamp(15px, 1.6vw, 17px);
  color: #b4bac4;
  line-height: 1.8;
  max-width: 60ch;
  margin-bottom: clamp(30px, 5vh, 48px);
}

.exp {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.exp span {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: #c9ced6;
  border: 1px solid var(--faint);
  border-radius: 100px;
  padding: 9px 18px;
  transition:
    border-color 0.4s,
    color 0.4s;
}
.exp span:hover {
  border-color: var(--c1);
  color: #fff;
}

.who {
  display: grid;
  grid-template-columns: clamp(130px, 18vw, 210px) 1fr;
  gap: clamp(28px, 5vw, 60px);
  align-items: center;
}
@media (max-width: 720px) {
  .who {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}
.portrait {
  position: relative;
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid var(--faint);
  background: #10141a;
}
.portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.05);
  transition:
    filter 0.6s ease,
    transform 0.6s ease;
}
.portrait:hover img {
  filter: grayscale(0) contrast(1);
  transform: scale(1.03);
}
.portrait .ph {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #3e444e;
}
.who .txt p {
  font-size: clamp(15px, 1.6vw, 17.5px);
  color: #b4bac4;
  line-height: 1.8;
  margin-bottom: 18px;
}
.who .txt p em {
  font-style: italic;
  color: var(--paper);
}
.who .txt .sign {
  font-family: "Instrument Serif", serif;
  font-size: 1.2rem;
  color: var(--paper);
  margin-top: 8px;
}
.who .txt em.grad {
  font-style: italic;
  font-weight: 500;
  background: linear-gradient(
    90deg,
    var(--c2),
    var(--c1),
    var(--c3),
    var(--c5),
    var(--c4),
    var(--c2)
  );
  background-size: 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: hue 11s linear infinite;
}

/* ===== ÉTAPES DE LA MÉTHODE (index.html) — .step ===== */
.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
}
.step {
  background: color-mix(in srgb, var(--sc) 4%, var(--ink));
  border-left: 2px solid var(--sc);
  padding: clamp(26px, 3.6vw, 40px);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(20px, 3vw, 36px);
  align-items: baseline;
  position: relative;
  overflow: hidden;
}
.step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  height: 1px;
  width: 100%;
  background: var(--sc);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.9s cubic-bezier(0.3, 0.1, 0.2, 1);
}
.step.in::before {
  transform: scaleX(1);
}
.step .sn {
  transition:
    opacity 0.6s ease,
    transform 0.6s ease;
  opacity: 0;
  transform: translateX(-12px);
}
.step.in .sn {
  opacity: 1;
  transform: none;
}
.step h3,
.step p {
  transition:
    opacity 0.6s ease 0.15s,
    transform 0.6s ease 0.15s;
  opacity: 0;
  transform: translateY(10px);
}
.step.in h3,
.step.in p {
  opacity: 1;
  transform: none;
}
.step.p2::before,
.step.p2 .sn,
.step.p2 h3,
.step.p2 p {
  transition-delay: 0.15s;
}
.step.p3::before,
.step.p3 .sn,
.step.p3 h3,
.step.p3 p {
  transition-delay: 0.3s;
}
.step .sn {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  color: var(--sc);
  line-height: 1;
}
.step h3 {
  font-size: clamp(1.3rem, 2.2vw, 1.7rem);
  color: var(--sc);
  margin-bottom: 10px;
  line-height: 1.2;
}
.step p {
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.7;
  max-width: 60ch;
}
.step.p1 {
  --sc: var(--c1);
}
.step.p2 {
  --sc: var(--c4);
}
.step.p3 {
  --sc: var(--c3);
}
.steps-after {
  margin-top: clamp(26px, 4vh, 40px);
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  color: #c9ced6;
  line-height: 1.4;
  max-width: 30ch;
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
}
.client {
  background: var(--ink);
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #3e444e;
  font-size: 12px;
  letter-spacing: 0.08em;
  transition: background 0.4s;
}
.client:hover {
  background: #10141a;
  color: var(--muted);
}

.proof {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
}
.proof .cell {
  background: var(--ink);
  padding: clamp(26px, 3.4vw, 40px);
}
.proof .k {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
  color: var(--paper);
  margin-bottom: 10px;
  line-height: 1.15;
}
.proof .k em {
  font-style: italic;
}
.proof .cell:nth-child(1) .k em {
  color: var(--c3);
}
.proof .cell:nth-child(2) .k em {
  color: var(--c2);
}
.proof .cell:nth-child(3) .k em {
  color: var(--c4);
}
.proof .cell:nth-child(4) .k em {
  color: var(--c5);
}
.proof .d {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}
.proof-link {
  display: inline-block;
  margin-top: clamp(24px, 4vh, 36px);
  text-decoration: underline;
  text-underline-offset: 4px;
  color: var(--c1);
  font-size: 14px;
  letter-spacing: 0.03em;
  transition: color 0.4s;
}
.proof-link:hover {
  color: var(--c3);
}

.entries {
  border-top: 1px solid var(--faint);
}
.entry {
  display: grid;
  grid-template-columns: clamp(38px, 6vw, 70px) 1fr auto;
  gap: clamp(16px, 3vw, 40px);
  align-items: center;
  padding: clamp(26px, 4.2vh, 48px) clamp(6px, 1.4vw, 14px);
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid var(--faint);
  position: relative;
  isolation: isolate;
}
.entry::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, var(--ec) 0%, transparent 78%);
  opacity: 0;
  transition: opacity 0.6s;
}
.entry:hover::before {
  opacity: 0.07;
}
.entry .n {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.2rem, 2.2vw, 1.8rem);
  color: var(--ec);
  opacity: 0.5;
  transition: opacity 0.5s;
}
.entry:hover .n {
  opacity: 1;
}
.entry h3 {
  font-size: clamp(1.3rem, 2.6vw, 2rem);
  color: #c9ced6;
  transition: color 0.5s;
  line-height: 1.15;
  margin-bottom: 5px;
}
.entry:hover h3 {
  color: #fff;
}
.entry p {
  font-size: clamp(13px, 1.4vw, 14.5px);
  color: var(--muted);
  line-height: 1.6;
  max-width: 54ch;
}
.entry .a {
  font-size: 19px;
  color: var(--ec);
  opacity: 0;
  transform: translateX(-8px);
  transition:
    opacity 0.5s,
    transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.entry:hover .a {
  opacity: 1;
  transform: none;
}
.entry.e1 {
  --ec: var(--c1);
}
.entry.e2 {
  --ec: var(--c4);
}
.entry.e3 {
  --ec: var(--c2);
}
.entry.e4 {
  --ec: var(--c5);
}
@media (max-width: 720px) {
  .entry {
    grid-template-columns: auto 1fr;
    gap: 14px;
  }
  .entry .a {
    display: none;
  }
}

.contact {
  padding: clamp(70px, 12vh, 150px) 0;
  border-top: 1px solid var(--faint);
}
.contact h2 {
  font-family: "Instrument Serif", serif;
  font-size: clamp(2rem, 4.4vw, 3.4rem);
  line-height: 1.2;
  max-width: 20ch;
  margin-bottom: clamp(30px, 5vh, 44px);
}
.contact h2 em {
  font-style: italic;
  color: var(--c5);
}
.contact .links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.contact .links a {
  font-size: 14px;
  letter-spacing: 0.03em;
  text-decoration: none;
  padding: 14px 26px;
  border: 1px solid var(--faint);
  color: var(--paper);
  transition: border-color 0.4s;
}
.contact .links a.primary {
  border-color: var(--c5);
  color: var(--c5);
}
.contact .links a:hover {
  border-color: var(paper);
  color: var(--paper);
}

footer {
  position: relative;
  z-index: 2;
                }
/* ===== bloc constat (proto, préfixé sy-) ===== */
.sy-stage {
  position: relative;
  width: 100vw;
  left: 50%;
  transform: translateX(-50%);
  overflow: hidden;
  --sc: #28e6ff;
  background: #c9b8f0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 120px;
  text-align: center;
  padding: 60px 40px 50px;
}

/* FOND : glisse et change selon le volet */
.sy-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.sy-bg.sy-solid {
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--sc) 70%, transparent),
    color-mix(in srgb, var(--sc) 40%, transparent)
  );
}
.sy-bg .sy-spectre {
  position: absolute;
  width: 250vmax;
  height: 250vmax;
  left: 50%;
  top: 50%;
  margin-left: -125vmax;
  margin-top: -125vmax;
  background: conic-gradient(
    from 0deg at 50% 50%,
    var(--c1),
    var(--c2),
    var(--c3),
    var(--c4),
    var(--c5),
    var(--c1)
  );
  opacity: 0.7;
  filter: blur(60px);
  animation: sy-spin 28s linear infinite;
}
@keyframes sy-spin {
  from {
    transform: rotate(0);
  }
  to {
    transform: rotate(360deg);
  }
}
.sy-stage:not(.sy-is-meta) .sy-bg .sy-spectre {
  display: none;
}
.sy-stage.sy-is-meta .sy-bg {
  background: transparent;
}

/* CONTENU */
.sy-titre {
  position: relative;
  z-index: 1;
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: 2.2rem;
  color: var(--ink);
}
.sy-constat-row {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 4vw, 60px);
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
}
.sy-constat {
  position: relative;
  font-family: "Instrument Serif", serif;
  font-size: 1.9rem;
  line-height: 1.3;
  max-width: 34ch;
  margin: 0 auto;
  color: var(--ink);
  height: calc(1.3em * 4);
  display: flex;
  align-items: center;
  justify-content: center;
}
.sy-nav-arrow {
  background: none;
  border: none;
  cursor: pointer;
  flex: none;
  font-family: "Instrument Serif", serif;
  font-size: clamp(2.6rem, 5vw, 3.8rem);
  line-height: 1;
  color: var(--ink);
  opacity: 0.4;
  transition:
    opacity 0.2s,
    transform 0.2s;
  padding: 0 6px;
}
.sy-nav-arrow:hover {
  opacity: 0.95;
  transform: scale(1.15);
}

/* la piste qui glisse : titre + constat (le fond glisse via .sy-bg séparément) */
.sy-slider {
  position: relative;
  z-index: 1;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 120px;
  will-change: transform, opacity;
}

.sy-btn {
  position: relative;
  z-index: 5;
  overflow: hidden;
  --px: 50%;
  --py: 50%;
  --tiltx: 0;
  --tilty: 0;
  background: rgba(255, 255, 255, 0.18);
  -webkit-backdrop-filter: blur(6px) saturate(158%);
  backdrop-filter: blur(6px) saturate(158%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 999px;
  box-shadow:
    0 12px 34px rgba(0, 0, 0, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.7);
  color: var(--ink);
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: 1.9rem;
  padding: 14px 46px;
  min-width: 230px;
  cursor: pointer;
  transform: perspective(650px) rotateX(calc(var(--tiltx) * 1deg))
    rotateY(calc(var(--tilty) * 1deg));
  transition: transform 0.18s ease;
}
.sy-btn-holo {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: url("grain.png");
  background-size: 600% 600%;
  background-position: var(--px) var(--py);
  opacity: 0.62;
  mix-blend-mode: screen;
  transition: background-position 0.25s ease;
}
.sy-btn-label {
  position: relative;
  z-index: 2;
  color: var(--ink);
}

.sy-btn-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 70px;
}
.sy-nav-dots {
  position: relative;
  z-index: 5;
  display: flex;
  gap: 14px;
  align-items: center;
  justify-content: center;
}
.sy-nav-dots button {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  padding: 0;
  background: var(--ink);
  opacity: 0.25;
  transition:
    opacity 0.25s,
    transform 0.25s;
}
.sy-nav-dots button:hover {
  opacity: 0.55;
}
.sy-nav-dots button.active {
  opacity: 0.85;
  transform: scale(1.35);
}

/* CARTE HYPOTHÈSE : centrée sur la rangée du constat */
.sy-sticker {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 4;
  --spx: 50%;
  --spy: 50%;
  transform: translate(-50%, -50%) scale(0.6);
  width: clamp(440px, 46vw, 560px);
  height: clamp(264px, 26vw, 324px);
  border-radius: var(--blob, 50%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: clamp(30px, 3.5vw, 46px);
  background: rgba(255, 255, 255, 0.18);
  -webkit-backdrop-filter: blur(4px) saturate(158%);
  backdrop-filter: blur(4px) saturate(158%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.85);
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.3s ease,
    transform 0.45s cubic-bezier(0.2, 0.9, 0.3, 1.1);
}
.sy-sticker::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: url("grain.png");
  background-size: 600% 600%;
  background-position: var(--spx) var(--spy);
  opacity: 0.5;
  mix-blend-mode: screen;
  transition: background-position 0.25s ease;
}
.sy-stage.sy-revealed .sy-sticker {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, -50%) scale(1);
  transition:
    opacity 0.3s ease,
    transform 0.5s cubic-bezier(0.2, 0.9, 0.3, 1.1);
}
.sy-rainbow {
  position: absolute;
  top: -20%;
  bottom: -20%;
  left: -45%;
  width: 40%;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(
    100deg,
    transparent,
    var(--c1) 14%,
    var(--c2) 34%,
    var(--c3) 52%,
    var(--c5) 70%,
    var(--c4) 88%,
    transparent
  );
  filter: blur(6px);
  transform: skewX(-14deg);
  opacity: 0;
  mix-blend-mode: screen;
}
.sy-stage.sy-revealed .sy-rainbow {
  animation: sweep 1s cubic-bezier(0.6, 0, 0.2, 1) 0.05s 1;
}

.sy-hypo {
  font-family: "Instrument Serif", serif;
  font-size: 1.9rem;
  line-height: 1.3;
  color: var(--ink);
  position: relative;
  z-index: 3;
  max-width: 24ch;
  opacity: 0;
  transition: opacity 0.2s ease;
  text-shadow: 0 1px 10px rgba(255, 255, 255, 0.6);
}
.sy-stage.sy-revealed .sy-hypo {
  opacity: 1;
  transition: opacity 0.3s ease 0.45s;
}

/* Source: reciprocites-v2.html */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
/* nav */
.menu a:nth-child(3):hover {
  color: var(--c3);
}
/* ─────────── I. RECONNAÎTRE ─────────── */
.open {
  padding: clamp(80px, 15vh, 170px) 0 clamp(50px, 8vh, 90px);
}
.open h1 {
  font-size: clamp(32px, 5.2vw, 76px);
  letter-spacing: -0.022em;
  max-width: 19ch;
  margin-bottom: clamp(32px, 5vh, 50px);
}
.open h1 em {
  font-style: italic;
  color: var(--c4);
}
.open .lede {
  font-size: clamp(16px, 1.85vw, 20px);
  line-height: 1.7;
  color: #b4bac4;
  max-width: 56ch;
}
.open .lede + .lede {
  margin-top: 20px;
}

/* la spirale */
.spiral {
  padding: clamp(30px, 5vh, 60px) 0 clamp(70px, 11vh, 130px);
}
.root {
  border-left: 2px solid var(--c4);
  padding-left: clamp(18px, 2.6vw, 32px);
  margin-bottom: clamp(40px, 6vh, 70px);
  max-width: 60ch;
}
.root .eyebrow {
  color: var(--c4);
  margin-bottom: 14px;
}
.root h3 {
  font-size: clamp(21px, 2.7vw, 32px);
  line-height: 1.25;
  margin-bottom: 14px;
  max-width: 24ch;
}
.root p {
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.8;
}
.root p + p {
  margin-top: 18px;
}
.root .et-pourtant {
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: clamp(18px, 2.3vw, 26px);
  line-height: 1.4;
  color: var(--c4);
  margin-top: 26px;
  max-width: 26ch;
}
.etages {
  margin-bottom: 22px;
}

.levels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
}
@media (max-width: 780px) {
  .levels {
    grid-template-columns: 1fr;
  }
}
.lvl {
  background: var(--ink);
  padding: clamp(22px, 2.8vw, 32px);
}
.lvl .n {
  font-family: "Instrument Serif", serif;
  font-size: 13px;
  color: var(--lc);
  margin-bottom: 14px;
}
.lvl h4 {
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  font-size: clamp(19px, 2.2vw, 25px);
  margin-bottom: 10px;
  color: var(--lc);
}
.lvl p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.65;
}
.lvl:nth-child(1) {
  --lc: var(--c1);
}
.lvl:nth-child(2) {
  --lc: var(--c2);
}
.lvl:nth-child(3) {
  --lc: var(--c3);
}
.loop {
  margin-top: 26px;
  font-size: 14px;
  color: var(--muted);
  border-left: 1px solid var(--faint);
  padding-left: 18px;
  max-width: 70ch;
  line-height: 1.8;
}
.loop b {
  color: var(--c4);
  font-weight: 400;
}

/* ─────────── II. EXPLORER LES 18 LIEUX ─────────── */
.lieux {
  padding: clamp(20px, 3vh, 40px) 0 clamp(70px, 11vh, 140px);
}
.sec-head {
  margin-bottom: clamp(38px, 6vh, 68px);
}
.sec-head h2 {
  font-size: clamp(27px, 3.8vw, 50px);
  max-width: 22ch;
  margin: 14px 0 22px;
}
.sec-head h2 em {
  font-style: italic;
  color: var(--c5);
}
.praxis .sec-head h2 em {
  color: var(--c3);
}
.sec-head p {
  font-size: 15.5px;
  color: var(--muted);
  max-width: 62ch;
  line-height: 1.8;
}

.explore {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: start;
}
@media (max-width: 900px) {
  .explore {
    grid-template-columns: 1fr;
  }
}

.group + .group {
  margin-top: 34px;
}
.group > .gt {
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gc);
  font-weight: 500;
  margin-bottom: 12px;
}
.group:nth-of-type(1) {
  --gc: var(--c4);
}
.group:nth-of-type(2) {
  --gc: var(--c1);
}
.group:nth-of-type(3) {
  --gc: var(--c2);
}
.group:nth-of-type(4) {
  --gc: var(--c3);
}

.list {
  border-top: 1px solid var(--faint);
}
.item {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  align-items: baseline;
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  cursor: pointer;
  border-bottom: 1px solid var(--faint);
  padding: 13px 10px 13px 4px;
  font-family: inherit;
  color: #b7bdc7;
  font-size: 14.5px;
  font-weight: 300;
  line-height: 1.45;
  transition:
    color 0.35s ease,
    background 0.35s ease,
    padding-left 0.35s ease;
}
.item:hover {
  color: #fff;
  padding-left: 10px;
}
.item .no {
  font-family: "Instrument Serif", serif;
  font-size: 12.5px;
  color: #4e5561;
  transition: color 0.35s ease;
}
.item:hover .no {
  color: var(--gc);
}
.item.active {
  color: #fff;
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--gc) 9%, transparent),
    transparent 88%
  );
  padding-left: 10px;
}
.item.active .no {
  color: var(--gc);
}

/* panneau */
.panel {
  position: sticky;
  top: 34px;
}
.card {
  border: 1px solid var(--faint);
  padding: clamp(26px, 3.2vw, 42px);
  min-height: 400px;
  display: flex;
  flex-direction: column;
  --pc: var(--c4);
}
.card .kicker {
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--pc);
  font-weight: 500;
  margin-bottom: 20px;
}
.card h3 {
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.22;
  margin-bottom: 16px;
  max-width: 22ch;
}
.card .sum {
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: clamp(15.5px, 1.7vw, 19px);
  line-height: 1.5;
  color: var(--pc);
  margin-bottom: 26px;
}
.card .body {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
}
.card .out {
  margin-top: auto;
  padding-top: 26px;
  border-top: 1px solid var(--faint);
}
.card .out .lb {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 9px;
}
.card .out .porte {
  font-size: 15px;
  color: var(--paper);
  line-height: 1.6;
  margin-bottom: 22px;
}
.card .out .seuil {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.7;
}
.card .idle {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.8;
  margin: auto 0;
}
.card .idle b {
  color: var(--paper);
  font-weight: 400;
}

/* ─────────── III. LE DÉPLACEMENT ─────────── */
.deplacement {
  padding: clamp(80px, 13vh, 160px) 0;
  border-top: 1px solid var(--faint);
}
.geste {
  border-left: 2px solid var(--c1);
  padding-left: clamp(20px, 3vw, 38px);
  margin-bottom: clamp(50px, 8vh, 90px);
}
.geste .eyebrow {
  color: var(--c1);
  margin-bottom: 16px;
}
.geste p {
  font-family: "Instrument Serif", serif;
  font-size: clamp(23px, 3.5vw, 46px);
  line-height: 1.2;
  max-width: 24ch;
}
.geste .def {
  font-family: "Inter", sans-serif;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 62ch;
  margin-top: clamp(26px, 4vh, 40px);
}
.principes {
  margin-bottom: clamp(26px, 4vh, 42px);
}
.principes h3 {
  font-size: clamp(21px, 2.7vw, 32px);
  margin: 14px 0 12px;
  max-width: 24ch;
}
.principes p {
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.8;
  max-width: 58ch;
}
.vgrid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
}
.v {
  background: var(--ink);
  padding: clamp(22px, 2.8vw, 32px);
  min-height: 160px;
}
.v .n {
  font-family: "Instrument Serif", serif;
  font-size: 13px;
  color: var(--vc);
  margin-bottom: 14px;
}
.v h4 {
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  font-size: clamp(17px, 1.9vw, 22px);
  line-height: 1.25;
  margin-bottom: 11px;
}
.v h4 span {
  color: var(--vc);
}
.v p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}
.v:nth-child(1) {
  --vc: var(--c1);
}
.v:nth-child(2) {
  --vc: var(--c2);
}
.v:nth-child(3) {
  --vc: var(--c3);
}
.v:nth-child(4) {
  --vc: var(--c4);
}

/* ─────────── IV. LA PRAXIS ─────────── */
.praxis {
  padding: clamp(70px, 11vh, 140px) 0;
  border-top: 1px solid var(--faint);
}
.objets {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
  margin-top: clamp(26px, 4vh, 44px);
}
.objet {
  background: var(--ink);
  padding: clamp(24px, 3vw, 36px);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  min-height: 215px;
  transition: background 0.5s ease;
}
.objet:hover {
  background: #12161d;
}
.objet .k {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--oc);
  font-weight: 500;
  margin-bottom: 18px;
}
.objet h4 {
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  font-size: clamp(19px, 2.2vw, 25px);
  line-height: 1.2;
  margin-bottom: 12px;
}
.objet p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.7;
}
.objet .go {
  margin-top: auto;
  padding-top: 18px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #3e444e;
  transition: color 0.4s ease;
}
.objet:hover .go {
  color: var(--oc);
}
.objet:nth-child(1) {
  --oc: var(--c1);
}
.objet:nth-child(2) {
  --oc: var(--c2);
}
.objet:nth-child(3) {
  --oc: var(--c3);
}
.objet:nth-child(4) {
  --oc: var(--c4);
}

.lead-method {
  font-size: 15.5px;
  color: var(--muted);
  line-height: 1.85;
  max-width: 64ch;
  margin-bottom: clamp(40px, 6vh, 66px);
}
.lead-method strong {
  color: var(--paper);
  font-weight: 400;
}

/* rôles */
.roles {
  margin-bottom: clamp(50px, 8vh, 90px);
}
.roles > .eyebrow {
  margin-bottom: 20px;
}
.rgrid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
}
.role {
  background: var(--ink);
  padding: clamp(22px, 2.8vw, 30px);
}
.role .rn {
  font-family: "Instrument Serif", serif;
  font-size: clamp(19px, 2.1vw, 24px);
  color: var(--paper);
  margin-bottom: 11px;
}
.role p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.7;
}
.rnote {
  margin-top: 20px;
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.75;
  max-width: 64ch;
  font-style: italic;
}

/* préliminaire — dimensionner : carte détachée */
.prelim {
  background: #10141a;
  border: 1px solid #2b313b;
  border-radius: 3px;
  padding: clamp(26px, 3.6vw, 52px);
  margin-bottom: clamp(56px, 9vh, 100px);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.06),
    0 0 40px -6px rgba(255, 255, 255, 0.09),
    0 0 110px -20px rgba(255, 255, 255, 0.07);
}
.prelim h3 {
  font-size: clamp(28px, 3.6vw, 46px);
  margin: 12px 0 20px;
}
.plead {
  font-size: 15.5px;
  color: var(--muted);
  line-height: 1.85;
  max-width: 70ch;
}
.plead strong {
  color: var(--paper);
  font-weight: 400;
}

.obj {
  margin-top: clamp(32px, 5vh, 52px);
  border-top: 1px solid var(--faint);
  padding-top: 26px;
}
.olab {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #5c636e;
  font-weight: 500;
  margin-bottom: 20px;
}
.peser .olab {
  margin-bottom: 10px;
}
.pintro {
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.8;
  max-width: 60ch;
  margin-bottom: 26px;
}
.onote {
  margin-top: 16px;
  font-size: 13.5px;
  color: var(--muted);
  font-style: italic;
}

.lvwrap {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: clamp(12px, 2vw, 22px);
  align-items: stretch;
}
@media (max-width: 700px) {
  .lvwrap {
    grid-template-columns: 1fr;
  }
  .lvaxis {
    display: none;
  }
}
.lvaxis {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #5c636e;
  font-weight: 500;
  padding: 2px 0;
}
.lvaxis .t {
  white-space: nowrap;
}
.lvaxis .line {
  position: relative;
  flex: 1;
  width: 1px;
  min-height: 60px;
  margin-left: 11px;
  background: linear-gradient(180deg, #2fffb4, #ffea4d, #ff9f45, #f9566a);
}
.lvaxis .line::after {
  content: "";
  position: absolute;
  left: -3px;
  bottom: 0;
  width: 7px;
  height: 7px;
  border-right: 1px solid #f9566a;
  border-bottom: 1px solid #f9566a;
  transform: rotate(45deg) translate(-1px, -1px);
}
.lvls {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.lvline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
@media (max-width: 700px) {
  .lvline {
    grid-template-columns: 1fr;
  }
}
.ob {
  background: #0b0e13;
  border: 1px solid #2b313b;
  border-radius: 4px;
  padding: 22px 20px;
  min-height: 190px;
  display: flex;
  flex-direction: column;
  text-align: left;
}
.ob h5 {
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  font-size: 17px;
  line-height: 1.25;
  margin-bottom: 14px;
  color: var(--paper);
}
.ob h5::after {
  content: "";
  display: block;
  width: 30px;
  height: 2px;
  background: var(--lvl);
  margin-top: 14px;
}
.ob p {
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.65;
}
.lvline.n1 {
  --lvl: #2fffb4;
}
.lvline.n2 {
  --lvl: #ffea4d;
}
.lvline.n3 {
  --lvl: #ff9f45;
}
.lvline.n4 {
  --lvl: #f9566a;
}

/* la balance */
.peser {
  margin-top: clamp(34px, 5vh, 56px);
  border-top: 1px solid var(--faint);
  padding-top: 26px;
}
.pcols {
  display: grid;
  grid-template-columns: 1fr 40px 1fr;
  gap: clamp(10px, 2vw, 26px);
  align-items: stretch;
  margin-top: 18px;
}
@media (max-width: 760px) {
  .pcols {
    grid-template-columns: 1fr;
  }
  .pvs {
    display: none;
  }
}
.pside {
  background: #0b0e13;
  border: 1px solid var(--faint);
  padding: clamp(20px, 2.6vw, 28px);
}
.pside .ph {
  font-family: "Instrument Serif", serif;
  font-size: clamp(19px, 2.2vw, 24px);
  margin-bottom: 8px;
}
.pside .ph span {
  font-size: 13px;
  color: var(--muted);
  font-style: italic;
}
.pside .pd {
  font-size: 12px;
  letter-spacing: 0.05em;
  color: #5c636e;
  margin-bottom: 18px;
}
.pside ul {
  list-style: none;
}
.pside li {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.6;
  padding: 8px 0;
  border-bottom: 1px solid rgba(36, 41, 50, 0.7);
}
.pside li:last-child {
  border-bottom: 0;
}
.pside.left .ph {
  color: var(--paper);
}
.pside.right .ph {
  color: var(--paper);
}
.pvs {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Inter", sans-serif;
  font-weight: 500;
  font-size: 26px;
  color: var(--paper);
}

.pres {
  margin-top: clamp(28px, 4vh, 44px);
}
.posits {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin-top: 16px;
}
.pos {
  background: #0b0e13;
  padding: clamp(18px, 2.2vw, 24px);
  border-top: 2px solid var(--pc);
}
.pos span {
  display: block;
  font-family: "Instrument Serif", serif;
  font-size: clamp(17px, 1.9vw, 21px);
  color: var(--pc);
  margin-bottom: 9px;
}
.pos p {
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.6;
}
.pos.p1 {
  --pc: var(--c4);
}
.pos.p2 {
  --pc: #2fffb4;
}
.pos.p3 {
  --pc: #ffea4d;
}
.pos.p4 {
  --pc: var(--c1);
}
.pos.p5 {
  --pc: var(--c2);
}
.pres .onote em {
  color: #b9bfc9;
}

.poutil {
  margin-top: clamp(26px, 4vh, 40px);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: clamp(20px, 4vw, 54px);
}
.poutil .sl {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #5c636e;
  font-weight: 500;
  margin-bottom: 8px;
}
.poutil .sv {
  font-size: 15px;
  color: var(--paper);
  line-height: 1.5;
}
.poutil .sv.q {
  font-family: "Instrument Serif", serif;
  font-style: italic;
  color: var(--c1);
  font-size: 16px;
}

/* têtes d'étapes */
.etapes-head {
  margin-bottom: clamp(26px, 4vh, 42px);
}
.etapes-head h3 {
  font-size: clamp(21px, 2.7vw, 32px);
  margin: 14px 0 12px;
}
.etapes-head p {
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.8;
  max-width: 60ch;
}

/* frise */
.frise {
  border-top: 1px solid var(--faint);
}
/* ===== ÉTAPES DES RÉCIPROCITÉS (reciprocites-v2.html) — .rc-step ===== */
.rc-step {
  --stc: var(--paper);
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) minmax(200px, 270px);
  gap: clamp(14px, 2.6vw, 40px);
  align-items: start;
  padding: clamp(24px, 3vw, 36px) clamp(10px, 1.6vw, 18px);
  border-bottom: 1px solid var(--faint);
  position: relative;
  isolation: isolate;
}
.rc-step::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, var(--stc) 0%, transparent 82%);
  opacity: 0;
  transition: opacity 0.6s ease;
}
.rc-step:hover::before {
  opacity: 0.045;
}
.rc-step.st1 {
  --stc: var(--c1);
}
.rc-step.st2 {
  --stc: var(--c2);
}
.rc-step.st3 {
  --stc: var(--c3);
}
.rc-step.st4 {
  --stc: var(--c4);
}
.rc-step.st5 {
  --stc: var(--c5);
}
.rc-step .sn {
  font-family: "Instrument Serif", serif;
  font-size: 15px;
  color: var(--stc);
  padding-top: 6px;
}
.rc-step h4 {
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  font-size: clamp(21px, 2.5vw, 29px);
  margin-bottom: 12px;
  color: var(--stc);
}
.rc-step .sq {
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: clamp(15px, 1.7vw, 18px);
  color: #d2d7de;
  margin-bottom: 12px;
  max-width: 46ch;
}
.rc-step .st {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.75;
  max-width: 64ch;
}
.rc-step .sr {
  border-left: 1px solid var(--faint);
  padding-left: clamp(14px, 2vw, 24px);
}
.rc-step .sl {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #5c636e;
  font-weight: 500;
  margin-bottom: 6px;
}
.rc-step .sv {
  font-size: 14px;
  color: var(--paper);
  line-height: 1.5;
  margin-bottom: 18px;
}
.rc-step .sv:last-child {
  margin-bottom: 0;
}
.rc-step .sv.q {
  font-family: "Instrument Serif", serif;
  font-style: italic;
  color: var(--stc);
  font-size: 15px;
}
@media (max-width: 820px) {
.rc-step {
    grid-template-columns: 38px 1fr;
}
.rc-step .sr {
    grid-column: 2;
    margin-top: 18px;
    border-left: 0;
    padding-left: 0;
}
}

.verbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.verbs span {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #8a919c;
  border: 1px solid var(--faint);
  padding: 5px 11px;
}

.ouverture {
  margin-top: clamp(30px, 4.5vh, 48px);
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.8;
  max-width: 64ch;
  border-left: 1px solid var(--faint);
  padding-left: 18px;
}

/* ─────────── V. LA THÉORIE ─────────── */
.theorie {
  padding: clamp(70px, 11vh, 140px) 0;
  border-top: 1px solid var(--faint);
}
.cta-serie {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  margin-top: clamp(30px, 5vh, 50px);
  padding: 18px 30px;
  border: 1px solid var(--faint);
  text-decoration: none;
  color: var(--paper);
  font-size: 15px;
  letter-spacing: 0.02em;
  transition:
    border-color 0.4s ease,
    gap 0.4s ease,
    color 0.4s ease;
}
.cta-serie .arw {
  color: var(--c1);
  transition: transform 0.4s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.cta-serie:hover {
  border-color: var(--c1);
  gap: 22px;
  color: #fff;
}
.cta-serie:hover .arw {
  transform: translateX(4px);
}
.art {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: clamp(14px, 2.6vw, 36px);
  align-items: start;
  padding: clamp(20px, 2.8vw, 30px) clamp(12px, 1.8vw, 22px);
  border-bottom: 1px solid var(--faint);
  text-decoration: none;
  color: inherit;
  position: relative;
  isolation: isolate;
}
.art::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, var(--ac) 0%, transparent 90%);
  opacity: 0;
  transition: opacity 0.6s ease;
}
.art:hover::before {
  opacity: 0.06;
}
.art .num {
  font-family: "Instrument Serif", serif;
  font-size: 14px;
  color: var(--muted);
  padding-top: 5px;
  transition: color 0.4s ease;
}
.art:hover .num {
  color: var(--ac);
}
.art h3 {
  font-size: clamp(18px, 2.2vw, 26px);
  line-height: 1.25;
  margin-bottom: 8px;
  color: #c9ced6;
  transition: color 0.4s ease;
  max-width: 28ch;
}
.art:hover h3 {
  color: #fff;
}
.art .idea {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  max-width: 70ch;
}
.art:nth-of-type(1) {
  --ac: var(--c1);
}
.art:nth-of-type(2) {
  --ac: var(--c2);
}
.art:nth-of-type(3) {
  --ac: var(--c3);
}
.art:nth-of-type(4) {
  --ac: var(--c4);
}
.art:nth-of-type(5) {
  --ac: var(--c5);
}
@media (max-width: 640px) {
  .art {
    grid-template-columns: 34px 1fr;
  }
}

/* ─────────── VI. TRAVAILLER ENSEMBLE ─────────── */
.travail {
  padding: clamp(80px, 13vh, 160px) 0;
  border-top: 1px solid var(--faint);
}
.secteurs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: var(--faint);
  border: 1px solid var(--faint);
  margin-top: clamp(26px, 4vh, 44px);
}
.s {
  background: var(--ink);
  padding: clamp(22px, 2.8vw, 32px);
  min-height: 185px;
}
.s .n {
  font-family: "Instrument Serif", serif;
  font-size: 13px;
  color: var(--sc);
  margin-bottom: 14px;
}
.s h4 {
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.24;
  margin-bottom: 11px;
}
.s p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.65;
}
.s:nth-child(1) {
  --sc: var(--c1);
}
.s:nth-child(2) {
  --sc: var(--c2);
}
.s:nth-child(3) {
  --sc: var(--c3);
}
.s:nth-child(4) {
  --sc: var(--c4);
}

.clos {
  padding: clamp(70px, 11vh, 140px) 0;
  border-top: 1px solid var(--faint);
}
.clos blockquote {
  font-family: "Instrument Serif", serif;
  font-size: clamp(25px, 4vw, 52px);
  line-height: 1.16;
  max-width: 24ch;
}
.clos blockquote span {
  color: var(--c5);
  font-style: italic;
}
.clos .after {
  margin-top: 32px;
  max-width: 58ch;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.8;
}
.clos .after + .after {
  margin-top: 20px;
}

a:link {
  color: var(--c1);
  text-decoration: none;
  transition: color 0.4s ease;
}

a:hover {
  color: var(--c5);
}

a:visited {
  color: var(--c2);
  text-decoration: none;
}

a:active {
  color: var(--c3);
  text-decoration: none;
}

ul {
  list-style: inside;
  padding-left: 0;
  margin-top: 10px;
}

li {
  line-height: 1.7;
  color: var(--paper);
  
}
/* Source: relation-paradigme-du-design.html */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation: none !important;
    transition: none !important;
  }
}
body {
  background: var(--ink);
  color: var(--paper);
  font-family: "Inter", system-ui, sans-serif;
  font-weight: 300;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  }
h1,
h2,
h3 {
  font-family: "Instrument Serif", Georgia, serif;
  font-weight: 400;
  line-height: 1.1;
}
.wrap {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 clamp(24px, 6vw, 90px);
}
.eyebrow {
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
}

/* nav */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: clamp(26px, 3.4vh, 38px) 0;
  border-bottom: 1px solid var(--faint);
}
.brand {
  display: flex;
  align-items: center;
  gap: 13px;
  text-decoration: none;
  color: inherit;
}
.mark {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--muted);
  flex: none;
  position: relative;
  transition: border-color 0.5s ease;
}
.mark::after {
  content: "";
  position: absolute;
  inset: 7px;
  border-radius: 50%;
  background: var(--muted);
  transition:
    background 0.5s ease,
    inset 0.5s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.brand:hover .mark {
  border-color: var(--c1);
}
.brand:hover .mark::after {
  background: var(--c1);
  inset: 9px;
}
.brand .name {
  font-family: "Instrument Serif", serif;
  font-size: 19px;
}
.menu {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3.2vw, 44px);
}
.menu a {
  position: relative;
  text-decoration: none;
  color: var(--muted);
  font-size: 13.5px;
  letter-spacing: 0.06em;
  transition: color 0.4s ease;
  padding-bottom: 3px;
}
.menu a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.menu a:hover::after,
.menu a.on::after {
  transform: scaleX(1);
}
.menu a:nth-child(1):hover,
.menu a:nth-child(1).on {
  color: var(--c1);
}
.menu a:nth-child(2):hover {
  color: var(--c3);
}
.menu a.contact {
  color: var(--paper);
}
.menu a.contact:hover {
  color: var(--c5);
}
@media (max-width: 640px) {
  .brand .name {
    font-size: 16px;
  }
  .menu {
    gap: 15px;
  }
  .menu a {
    font-size: 12px;
    letter-spacing: 0.02em;
  }
}

/* hero */
.hero {
  padding: clamp(80px, 16vh, 180px) 0 clamp(50px, 9vh, 100px);
  position: relative;
}
.hero .eyebrow {
  margin-bottom: clamp(26px, 4vh, 38px);
}
.hero h1 {
  font-size: clamp(2.6rem, 6vw, 5.4rem);
  letter-spacing: -0.02em;
  line-height: 1.04;
  max-width: 16ch;
  margin-bottom: clamp(28px, 4.5vh, 44px);
}
/* le mot qui se compose depuis les 5 couleurs */
.spectrum-word {
  position: relative;
  display: inline-block;
  font-style: italic;
  background: linear-gradient(
    90deg,
    var(--c1),
    var(--c2),
    var(--c3),
    var(--c4),
    var(--c5)
  );
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: spectrumShift 9s ease-in-out infinite;
}
@keyframes spectrumShift {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}
.hero .lede {
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.7;
  color: #b4bac4;
  max-width: 56ch;
}
.hero .lede em {
  font-style: italic;
  color: var(--paper);
}

/* série — le fil */
.serie {
  /* fusion des deux anciennes règles ; border-top retirée (le héros porte déjà son filet) */
  margin-top: clamp(26px, 4vh, 44px);
  padding: clamp(30px, 6vh, 70px) 0 clamp(90px, 15vh, 160px);
  position: relative;
}
.serie-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: clamp(40px, 7vh, 72px);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--faint);
}
.serie-head .t {
  font-size: clamp(1.1rem, 1.6vw, 1.35rem);
  font-family: "Instrument Serif", serif;
  color: #c9ced6;
}
.serie-head .n {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

/* la piste : rail vertical + fil coloré qui se trace */
.track {
  position: relative;
  display: grid;
  gap: 0;
}
.rail {
  position: absolute;
  left: clamp(18px, 4vw, 42px);
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--faint);
  z-index: 0;
}
.thread {
  position: absolute;
  left: clamp(18px, 4vw, 42px);
  top: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(
    180deg,
    var(--c1) 0%,
    var(--c2) 25%,
    var(--c3) 50%,
    var(--c4) 75%,
    var(--c5) 100%
  );
  transform-origin: top;
  transform: scaleY(0);
  transition: transform 1.8s cubic-bezier(0.2, 0.7, 0.2, 1);
  z-index: 1;
}
.track.drawn .thread {
  transform: scaleY(1);
}

/* chaque station */
.station {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: clamp(52px, 9vw, 96px) 1fr;
  gap: clamp(16px, 3vw, 40px);
  align-items: start;
  padding: clamp(30px, 5vh, 54px) 0;
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid var(--faint);
}
.station:last-child {
  border-bottom: none;
}
.station .node {
  position: relative;
  justify-self: start;
  margin-left: calc(
    clamp(18px, 4vw, 42px) - clamp(26px, 4.5vw, 48px) / 2 + 1px
  );
  width: clamp(26px, 4.5vw, 48px);
}
.dot {
  position: relative;
  z-index: 3;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--sc);
  margin: 6px auto 0;
  box-shadow: 0 0 0 5px var(--ink);
  transition:
    background 0.45s ease,
    box-shadow 0.45s ease,
    transform 0.45s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.station:hover .dot {
  background: var(--sc);
  transform: scale(1.25);
  box-shadow:
    0 0 0 5px var(--ink),
    0 0 22px -2px var(--sc);
}
.num {
  font-family: "Instrument Serif", serif;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  color: var(--sc);
  line-height: 1;
  text-align: center;
  margin-top: 14px;
  opacity: 1;
  transition: opacity 0.45s ease;
}
.station:hover .num {
  opacity: 1;
}

.body {
  padding-top: 4px;
}
.body h3 {
  font-size: clamp(1.35rem, 2.7vw, 2.05rem);
  line-height: 1.18;
  color: #c9ced6;
  transition: color 0.45s ease;
  max-width: 26ch;
  margin-bottom: 12px;
}
.station:hover .body h3 {
  color: #fff;
}
.body .idea {
  font-size: clamp(14px, 1.4vw, 15.5px);
  color: var(--muted);
  line-height: 1.7;
  max-width: 60ch;
  margin-bottom: 18px;
}
.body .foot {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.body .read {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.body .go {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #3e444e;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition:
    color 0.45s ease,
    gap 0.45s ease;
}
.station:hover .body .go {
  color: var(--sc);
  gap: 12px;
}

html,
body {
  height: auto;
  min-height: 100%;
}
body {
  display: block;
  overflow-x: hidden;
  overflow-y: auto;
}

/* Shared portfolio navigation */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  view-transition-name: site-nav;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 74px;
  padding: 18px clamp(24px, 6vw, 90px);
  color: var(--paper);
  background: rgba(11, 13, 16, 0.86);
  border-bottom: 1px solid rgba(36, 41, 50, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.site-nav .site-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
  white-space: nowrap;
}
.site-nav .site-mark {
  width: 28px;
  height: 42px;
  display: block;
  object-fit: contain;
  flex: none;
  filter: drop-shadow(0 0 3px rgba(40, 230, 255, 0.16));
  animation: logo-breathe 5s ease-in-out infinite;
}
.site-nav .site-brand:hover .site-mark {
  filter: drop-shadow(0 0 5px rgba(40, 230, 255, 0.3))
    drop-shadow(0 0 9px rgba(249, 104, 167, 0.16));
}
.site-nav .site-mark[src] {
  border: 0;
  border-radius: 0;
}
@keyframes logo-breathe {
  0%,
  100% {
    transform: scale(1);
    filter: drop-shadow(0 0 3px rgba(40, 230, 255, 0.14));
  }
  50% {
    transform: scale(1.025);
    filter: drop-shadow(0 0 5px rgba(40, 230, 255, 0.22))
      drop-shadow(0 0 8px rgba(159, 110, 255, 0.12));
  }
}
.site-nav .site-name {
  font-family: "Instrument Serif", Georgia, serif;
  font-size: 18px;
}
.site-nav .site-role {
  font-family: "Inter", sans-serif;
  font-size: 12px;
  color: var(--muted);
}
.site-nav .site-links {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.6vw, 34px);
}
.site-nav .site-links a {
  position: relative;
  padding: 5px 0;
  color: var(--muted);
  font:
    400 12px/1.2 "Inter",
    sans-serif;
  letter-spacing: 0.05em;
  text-decoration: none;
  transition: color 0.3s ease;
}
.site-nav .site-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.site-nav .site-links a:hover,
.site-nav .site-links a.active {
  color: var(--paper);
}
.site-nav .site-links a:hover::after,
.site-nav .site-links a.active::after {
  transform: scaleX(1);
}
.site-nav .site-links a:nth-child(1):hover,
.site-nav .site-links a:nth-child(1).active {
  color: var(--c1);
}
.site-nav .site-links a:nth-child(2):hover,
.site-nav .site-links a:nth-child(2).active {
  color: var(--c4);
}
.site-nav .site-links a:nth-child(3):hover,
.site-nav .site-links a:nth-child(3).active {
  color: var(--c3);
}
.site-nav .site-links a:nth-child(4):hover,
.site-nav .site-links a:nth-child(4).active {
  color: var(--c5);
}
.site-nav .site-links a.site-contact {
  color: var(--paper);
}
body.has-site-nav {
  padding-top: 74px;
}
body.has-site-nav {
  animation: page-enter 0.6s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}
@keyframes page-enter {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@media (max-width: 760px) {
  .site-nav {
    min-height: 64px;
    padding: 14px 18px;
  }
  .site-nav .site-role {
    display: none;
  }
  .site-nav .site-links {
    gap: 13px;
  }
  .site-nav .site-links a {
    font-size: 10px;
    letter-spacing: 0.02em;
  }
  body.has-site-nav {
    padding-top: 64px;
  }
}
@media (prefers-reduced-motion: reduce) {
  body.has-site-nav {
    animation: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  .site-nav .site-mark {
    animation: none;
  }
}

.station.st1 {
  --sc: var(--c1);
}
.station.st2 {
  --sc: var(--c2);
}
.station.st3 {
  --sc: var(--c3);
}
.station.st4 {
  --sc: var(--c4);
}
.station.st5 {
  --sc: var(--c5);
}

/* reveal au scroll */
.rv {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.8s ease,
    transform 0.8s ease;
}
.rv.in {
  opacity: 1;
  transform: none;
}

/* clôture */
.tail {
  padding: clamp(50px, 9vh, 100px) 0 clamp(70px, 12vh, 130px);
  border-top: 1px solid var(--faint);
  max-width: 60ch;
}
.tail p {
  font-family: "Instrument Serif", serif;
  font-style: italic;
  font-size: clamp(1.3rem, 2.4vw, 1.75rem);
  line-height: 1.4;
  color: #c9ced6;
}
.back {
  margin-top: clamp(30px, 5vh, 44px);
}
.back a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--muted);
  font-size: 13.5px;
  letter-spacing: 0.04em;
  transition:
    color 0.4s ease,
    gap 0.4s ease;
}
.back a:hover {
  color: var(--c1);
  gap: 14px;
}

footer {
  border-top: 1px solid var(--faint);
  padding: 44px 0 80px;
  font-size: 13px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
footer a {
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--faint);
}

@media (max-width: 640px) {
  .station {
    grid-template-columns: clamp(44px, 12vw, 60px) 1fr;
    gap: 16px;
  }
  .rail,
  .thread {
    left: 22px;
  }
}

/* ============ PIED DE PAGE — v1 (index.html) ============ */
.ft {
  position: relative;
  z-index: 2;
  /* neutralise la règle générique `footer { display:flex; padding:44px 0 80px }` */
  display: block;
  padding: 0;
  margin-top: clamp(70px, 11vh, 130px);
  background: #0e1117;
  border-top: 1px solid var(--faint);
  font-size: 13px;
  color: var(--muted);
}
/* le fil : rappel du motif qui traverse tout le site */
.ft::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--c1), var(--c2), var(--c3), var(--c5), var(--c4));
  opacity: 0.55;
}
.ft-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: clamp(48px, 7vw, 84px) clamp(24px, 6vw, 72px) 0;
}
.ft-top {
  display: grid;
  grid-template-columns: minmax(230px, 1fr) 2.15fr;
  gap: clamp(40px, 6vw, 90px);
}

/* — signature — */
.ft-mark {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}
.ft-mark img {
  width: 26px;
  height: 40px;
  object-fit: contain;
  flex: none;
  filter: drop-shadow(0 0 4px rgba(40, 230, 255, 0.18));
}
.ft-name {
  font-family: "Instrument Serif", serif;
  font-size: 1.5rem;
  color: var(--paper);
  line-height: 1.15;
}
.ft-role {
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.02em;
}
.ft-claim {
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.1rem, 1.8vw, 1.45rem);
  line-height: 1.35;
  color: #c9ced6;
  max-width: 20ch;
  margin-bottom: 18px;
}
.ft-claim em {
  font-style: italic;
  background: linear-gradient(90deg, var(--c1), var(--c2), var(--c3), var(--c5));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.ft-place {
  font-size: 15.5px;
  line-height: 1.5;
  color: #b4bac4;
  letter-spacing: 0.01em;
}

/* — colonnes — */
.ft-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(24px, 3.2vw, 48px);
}
/* la vieille règle `footer a { border-bottom }` soulignait tout : on ne garde
   le filet que sous les intitulés de colonne (.ft-h, qui porte le sien) */
.ft a {
  border-bottom: 0;
}
.ft-h {
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--faint);
}
.ft-col ul {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}
.ft-col li {
  margin-bottom: 10px;
}
.ft-col a,
.ft-soon {
  display: flex;
  align-items: baseline;
  gap: 9px;
  text-decoration: none;
  color: #b4bac4;
  font-size: 14.5px;
  line-height: 1.45;
  transition: color 0.3s ease;
}
.ft-col a:hover {
  color: var(--paper);
}
.ft-col .ft-tag {
  font-size: 11.5px;
  color: #5c636e;
  letter-spacing: 0.04em;
}
.ft-soon {
  color: #5c636e;
  cursor: default;
}

/* cas : chaque projet garde sa couleur */
.ft-cases li > * {
  position: relative;
  padding-left: 16px;
}
.ft-cases li > *::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--d);
  box-shadow: 0 0 8px -1px var(--d);
  transition: transform 0.35s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.ft-cases a:hover {
  color: var(--d);
}
.ft-cases a:hover::before {
  transform: scale(1.7);
}
.ft-cases .ft-soon::before {
  opacity: 0.4;
}

/* série : numéros en serif */
.ft-num b {
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  font-size: 12.5px;
  color: #5c636e;
  flex: none;
  transition: color 0.3s ease;
}
.ft-num a:hover b {
  color: var(--c1);
}

/* liens de bas de colonne — scopés dans .ft-col pour battre `.ft-col a` */
.ft-col .ft-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--c1);
  text-decoration: none;
  transition: gap 0.35s ease, color 0.3s ease;
}
.ft-col .ft-more:hover {
  gap: 13px;
  color: var(--c3);
}
.ft-col .ft-mail {
  font-size: 12.5px;
  color: #b4bac4;
  word-break: break-word;
}
.ft-col .ft-mail:hover {
  color: var(--c1);
  gap: 8px;
}

/* — bandeau bas — */
.ft-bottom {
  margin-top: clamp(40px, 6vh, 64px);
  padding: 20px 0 26px;
  border-top: 1px solid var(--faint);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 11.5px;
  color: #5c636e;
}
.ft-spectrum {
  display: flex;
  gap: 6px;
}
.ft-spectrum i {
  display: block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
}
.ft-up {
  color: #5c636e;
  text-decoration: none;
  transition: color 0.3s ease;
}
.ft-up:hover {
  color: var(--paper);
}

@media (max-width: 980px) {
  .ft-top {
    grid-template-columns: 1fr;
    gap: 44px;
  }
}
@media (max-width: 620px) {
  .ft-cols {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .ft-bottom {
    justify-content: flex-start;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ft-cases li > *::before,
  .ft-more {
    transition: none;
  }
}

/* ============ FIGURES CLIQUABLES ============ */
.fig-btn {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  color: inherit;
  cursor: zoom-in;
}
.fig-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 6px;
}
.figure {
  /* propriétés détaillées : le raccourci `margin` empêche l'animation de démarrer */
  transition:
    margin-left 0.45s cubic-bezier(0.2, 0.7, 0.2, 1),
    margin-right 0.45s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.figure.is-zoomed {
  position: relative;
  z-index: 3;
  box-shadow: 0 24px 60px -18px rgba(0, 0, 0, 0.55);
}
.figure.is-zoomed .fig-btn {
  cursor: zoom-out;
}
@media (max-width: 900px) {
  .fig-btn {
    cursor: default;
  }
}
@media (prefers-reduced-motion: reduce) {
  .figure {
    transition: none;
  }
}