/* =============================================================================
   Académie Jeet Kune Do — feuille de style unique
   Dark only, assumé. Aucune dépendance, aucune image externe.
   Sommaire : 01 tokens · 02 reset · 03 typo · 04 layout deck · 05 chrome
   06 hero · 07 sections · 08 charts · 09 formulaire · 10 motion · 11 responsive
   ========================================================================== */

/* ---------------------------------------------------------------- 01 tokens */

:root {
  /* Fallback hex — servi aux moteurs sans oklch() */
  --ink-900: #0b0e14;
  --ink-850: #11151d;
  --ink-800: #171c26;
  --ink-700: #2b3240;
  --paper: #f3f5f8;
  --paper-dim: #b0b6c1;
  --water: #5fd4e8;
  --ember: #f2603a;
  --gold: #f5c451;

  /* Typo */
  --font-display: "Instrument Serif", Georgia, "Times New Roman", serif;
  --font-ui: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --step--1: clamp(0.82rem, 0.79rem + 0.15vw, 0.9rem);
  --step-0:  clamp(1rem, 0.96rem + 0.2vw, 1.08rem);
  --step-1:  clamp(1.16rem, 1.08rem + 0.4vw, 1.38rem);
  --step-2:  clamp(1.4rem, 1.2rem + 0.9vw, 1.85rem);
  --step-3:  clamp(1.85rem, 1.45rem + 1.9vw, 2.9rem);
  --step-4:  clamp(2.5rem, 1.8rem + 3.4vw, 4.4rem);
  --step-5:  clamp(3.2rem, 2rem + 6vw, 7.2rem);

  /* Rythme */
  --gutter: clamp(1rem, 0.6rem + 2vw, 2.5rem);
  --wrap: 76rem;
  --nav-h: 4.25rem;
  --rhythm: clamp(2.5rem, 1.5rem + 3vw, 5rem);

  /* Mouvement */
  --ease: cubic-bezier(0.22, 0.61, 0.24, 1);
  --ease-out: cubic-bezier(0.16, 0.84, 0.31, 1);
  --dur-1: 180ms;
  --dur-2: 320ms;
  --dur-3: 560ms;
}

@supports (color: oklch(0 0 0)) {
  :root {
    --ink-900: oklch(0.13 0.012 255);
    --ink-850: oklch(0.16 0.014 255);
    --ink-800: oklch(0.19 0.016 255);
    --ink-700: oklch(0.26 0.018 255);
    --paper: oklch(0.97 0.004 255);
    --paper-dim: oklch(0.74 0.010 255);
    --water: oklch(0.80 0.12 205);
    --ember: oklch(0.66 0.20 32);
    --gold: oklch(0.84 0.14 88);
  }
}

/* Propriétés typées : rendent interpolables des valeurs qui ne le sont pas
   nativement (couleurs de gradient, angle de halo). */
@property --grad-a {
  syntax: "<color>";
  inherits: false;
  initial-value: transparent;
}
@property --grad-b {
  syntax: "<color>";
  inherits: false;
  initial-value: transparent;
}
@property --glow {
  syntax: "<percentage>";
  inherits: false;
  initial-value: 0%;
}

/* ----------------------------------------------------------------- 02 reset */

*, *::before, *::after { box-sizing: border-box; }

html {
  /* Le document lui-même est le conteneur de scroll du deck. */
  scroll-snap-type: y proximity;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
  scroll-padding-bottom: 5rem;
  overflow-x: clip;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  overflow-x: clip;
  background-color: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-ui);
  font-size: var(--step-0);
  font-weight: 400;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Fond global : deux nappes très basses, fixes, qui donnent la profondeur. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(70rem 45rem at 78% -10%, color-mix(in oklab, var(--water) 9%, transparent), transparent 70%),
    radial-gradient(55rem 40rem at 6% 108%, color-mix(in oklab, var(--ember) 7%, transparent), transparent 68%);
}

img, svg, canvas { display: block; max-width: 100%; }
svg { height: auto; }

h1, h2, h3, h4, p, figure, blockquote, dl, dd, ol, ul { margin: 0; }
ol, ul { padding: 0; list-style: none; }

a { color: inherit; text-decoration: none; }

button, input, select, textarea { font: inherit; color: inherit; }

:focus-visible {
  outline: 2px solid var(--water);
  outline-offset: 3px;
  border-radius: 3px;
}

::selection { background: color-mix(in oklab, var(--water) 35%, transparent); }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 200;
  translate: 0 -150%;
  padding: 0.75rem 1.1rem;
  min-height: 44px;
  display: grid;
  place-items: center;
  background: var(--paper);
  color: var(--ink-900);
  font-weight: 600;
  border-radius: 4px;
  transition: translate var(--dur-2) var(--ease-out);

  &:focus-visible { translate: 0 0; }
}

/* ------------------------------------------------------------------ 03 typo */

.h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--step-3);
  line-height: 1.06;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.h3 {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: var(--step-1);
  line-height: 1.25;
  letter-spacing: -0.008em;
  text-wrap: balance;
}

.lede {
  max-width: 48ch;
  color: var(--paper-dim);
  font-size: var(--step-1);
  line-height: 1.55;
  text-wrap: pretty;
}

p { text-wrap: pretty; }

.kicker {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--water);
  margin-bottom: 1.1rem;

  & .kicker__sep { color: var(--paper-dim); }
}

.kicker--hero {
  text-transform: none;
  letter-spacing: 0.08em;
  color: color-mix(in oklab, var(--water) 80%, var(--paper));
}

.note {
  margin-top: var(--rhythm);
  max-width: 60ch;
  color: var(--paper-dim);
  font-size: var(--step--1);
  line-height: 1.6;
  padding-left: 1rem;
  border-left: 1px solid color-mix(in oklab, var(--ink-700) 80%, transparent);
}

.tag {
  display: inline-block;
  margin-right: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72em;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ember);
}

.placeholder-inline {
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--paper-dim);
  border-bottom: 1px dotted color-mix(in oklab, var(--gold) 55%, transparent);
}

/* ----------------------------------------------------------- 04 layout deck */

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.wrap--narrow { max-width: 54rem; }

.deck__section {
  position: relative;
  min-height: 100svh;
  display: grid;
  /* Sans piste explicite, la colonne implicite se dimensionne sur le max-content
     de la section : les charts (min-width: 30rem) élargiraient alors .wrap
     au-delà du viewport au lieu de défiler dans .chart__scroll. */
  grid-template-columns: minmax(0, 1fr);
  align-content: center;
  padding-block: calc(var(--nav-h) + var(--rhythm)) var(--rhythm);
  scroll-snap-align: start;
  scroll-margin-top: 0;
}

/* FAQ et CTA final respirent en hauteur libre */
.faq { min-height: auto; padding-block: calc(var(--nav-h) + var(--rhythm)); }

.section-head {
  max-width: 46rem;
  margin-bottom: var(--rhythm);

  & .h2 { margin-bottom: 1.1rem; }
}

.section-head--center {
  margin-inline: auto;
  text-align: center;

  & .lede { margin-inline: auto; }
}

/* Séparation discrète entre écrans du deck */
.deck__section + .deck__section::before {
  content: "";
  position: absolute;
  inset-inline: var(--gutter);
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, color-mix(in oklab, var(--ink-700) 90%, transparent) 22%, color-mix(in oklab, var(--ink-700) 90%, transparent) 78%, transparent);
}

/* ---------------------------------------------------------------- 05 chrome */

.progress {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 90;
  height: 2px;
  background: color-mix(in oklab, var(--ink-700) 55%, transparent);
}

.progress__bar {
  height: 100%;
  transform-origin: 0 50%;
  transform: scaleX(var(--scroll-progress, 0));
  background: linear-gradient(90deg, var(--water), var(--gold) 60%, var(--ember));
}

@supports (animation-timeline: scroll()) {
  .progress__bar {
    transform: scaleX(0);
    animation: progress-grow linear both;
    animation-timeline: scroll(root block);
  }
}

@keyframes progress-grow {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

/* --- barre de navigation --- */

.topbar {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 80;
  min-height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-inline: var(--gutter);
  background: color-mix(in oklab, var(--ink-900) 78%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid color-mix(in oklab, var(--ink-700) 60%, transparent);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-height: 44px;
  margin-right: auto;
  color: var(--water);

  & .brand__mark { width: 30px; height: 30px; flex: none; }

  & .brand__text { display: grid; line-height: 1.05; }

  & .brand__word {
    font-family: var(--font-display);
    font-size: 1.35rem;
    letter-spacing: 0.12em;
    color: var(--paper);
  }

  & .brand__sub {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--paper-dim);
  }
}

.topnav {
  display: none;

  & ul { display: flex; gap: 0.35rem; }

  & a {
    display: grid;
    place-items: center;
    min-height: 44px;
    padding-inline: 0.85rem;
    font-size: var(--step--1);
    color: var(--paper-dim);
    border-radius: 4px;
    transition: color var(--dur-1) var(--ease), background-color var(--dur-1) var(--ease);

    &:hover { color: var(--paper); background: color-mix(in oklab, var(--paper) 6%, transparent); }
  }
}

.topbar__cta { display: none; }

/* --- boutons --- */

.btn {
  --glow: 0%;
  position: relative;
  display: inline-grid;
  place-items: center;
  min-height: 48px;
  padding: 0.75rem 1.5rem;
  font-size: var(--step-0);
  font-weight: 500;
  letter-spacing: 0.005em;
  border-radius: 2px;
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  transition: --glow var(--dur-3) var(--ease-out),
              background-color var(--dur-2) var(--ease),
              border-color var(--dur-2) var(--ease),
              color var(--dur-2) var(--ease),
              translate var(--dur-1) var(--ease-out);

  &:active { translate: 0 1px; }
}

.btn--primary {
  color: var(--ink-900);
  font-weight: 600;
  background-color: var(--water);
  background-image: radial-gradient(120% 180% at var(--glow) 50%, color-mix(in oklab, var(--gold) 62%, var(--water)), var(--water) 62%);
  border-color: var(--water);

  &:hover, &:focus-visible { --glow: 100%; }
}

.btn--ghost {
  color: var(--paper);
  border-color: color-mix(in oklab, var(--paper) 26%, transparent);
  background: transparent;

  &:hover, &:focus-visible {
    border-color: var(--water);
    color: var(--water);
    background: color-mix(in oklab, var(--water) 8%, transparent);
  }
}

/* --- rail de navigation du deck --- */

.rail {
  display: none;
  position: fixed;
  z-index: 70;
  inset-inline-end: 0.75rem;
  inset-block-start: 50%;
  translate: 0 -50%;

  & ul { display: grid; }

  & a {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.6rem;
    width: 44px;
    height: 44px;
    padding-right: 0.55rem;
    transition: width var(--dur-2) var(--ease-out);
  }

  & .rail__dot {
    flex: none;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: color-mix(in oklab, var(--paper) 28%, transparent);
    transition: background-color var(--dur-2) var(--ease), scale var(--dur-2) var(--ease-out);
  }

  & .rail__label {
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    white-space: nowrap;
    color: var(--paper-dim);
    opacity: 0;
    translate: 6px 0;
    transition: opacity var(--dur-2) var(--ease), translate var(--dur-2) var(--ease-out);
  }

  & a:hover, & a:focus-visible {
    & .rail__label { opacity: 1; translate: 0 0; }
    & .rail__dot { background: var(--paper); }
  }

  & a[aria-current="true"] .rail__dot {
    background: var(--water);
    scale: 1.45;
    box-shadow: 0 0 0 4px color-mix(in oklab, var(--water) 16%, transparent);
  }

  & a[aria-current="true"] .rail__label { opacity: 1; translate: 0 0; color: var(--water); }
}

/* --- barre CTA collante --- */

.sticky-cta {
  position: fixed;
  z-index: 75;
  inset-inline: var(--gutter);
  inset-block-end: 1rem;
  margin-inline: auto;
  max-width: 40rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem 0.7rem 0.7rem 1.15rem;
  background: color-mix(in oklab, var(--ink-850) 88%, transparent);
  backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid color-mix(in oklab, var(--ink-700) 90%, transparent);
  border-radius: 3px;
  box-shadow: 0 18px 50px -22px rgb(0 0 0 / 0.85);
  opacity: 1;
  translate: 0 0;
  transition: opacity var(--dur-2) var(--ease), translate var(--dur-2) var(--ease-out),
              display var(--dur-2) allow-discrete, overlay var(--dur-2) allow-discrete;

  @starting-style { opacity: 0; translate: 0 18px; }

  &[hidden] { display: none; opacity: 0; translate: 0 18px; }

  & .sticky-cta__text {
    flex: 1;
    min-width: 0;
    font-size: var(--step--1);
    line-height: 1.35;
    color: var(--paper-dim);

    & strong { color: var(--paper); font-weight: 600; }
  }

  & .sticky-cta__btn { flex: none; min-height: 44px; padding-inline: 1.1rem; font-size: var(--step--1); }
}

/* ------------------------------------------------------------------- 06 hero */

.hero {
  align-content: center;
  overflow: clip;
  padding-block: calc(var(--nav-h) + 2rem) 6rem;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0;
  transition: opacity 900ms var(--ease-out);
}

.hero.is-webgl .hero__canvas { opacity: 1; }

/* Voile de lisibilité. Même z-index que le canvas mais généré après lui dans
   l'ordre du DOM : il peint par-dessus les particules, et reste sous
   .hero__inner (z-index 1). */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(180deg,
    color-mix(in oklab, var(--ink-900) 60%, transparent) 0%,
    color-mix(in oklab, var(--ink-900) 44%, transparent) 55%,
    color-mix(in oklab, var(--ink-900) 72%, transparent) 100%);
}

/* Au-delà de 85rem il y a assez de place pour sortir l'emblème de la colonne
   de texte : il devient lisible comme emblème au lieu de passer sous les mots.
   La largeur est donnée explicitement : <canvas> est un élément remplacé, donc
   `width: auto` y résoudrait la taille intrinsèque du buffer WebGL au lieu de
   se déduire des inset — et le canvas déborderait du hero.
   Le module dimensionne l'emblème sur la hauteur du canvas, inchangée ici. */
@media (min-width: 85rem) {
  .hero__canvas {
    inset-inline-start: 56%;
    width: 44%;
  }

  .hero::after {
    background: linear-gradient(96deg,
      var(--ink-900) 0%,
      color-mix(in oklab, var(--ink-900) 52%, transparent) 34%,
      transparent 58%);
  }
}

/* Fallback CSS : seul visuel tant que le WebGL n'a pas confirmé son démarrage */
.hero__fallback {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: clip;
  opacity: 1;
  transition: opacity 700ms var(--ease);
}

.hero.is-webgl .hero__fallback { opacity: 0; visibility: hidden; }

.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  will-change: transform;
}

.hero__orb--water {
  inset-block-start: -18%;
  inset-inline-end: -10%;
  width: min(58rem, 105vw);
  aspect-ratio: 1;
  background: radial-gradient(circle at 42% 38%, color-mix(in oklab, var(--water) 34%, transparent), transparent 62%);
  animation: drift-a 26s var(--ease) infinite alternate;
}

.hero__orb--ember {
  inset-block-end: -28%;
  inset-inline-start: -18%;
  width: min(46rem, 95vw);
  aspect-ratio: 1;
  background: radial-gradient(circle at 58% 52%, color-mix(in oklab, var(--ember) 26%, transparent), transparent 64%);
  animation: drift-b 34s var(--ease) infinite alternate;
}

.hero__emblem {
  position: absolute;
  inset-block-start: 50%;
  inset-inline-start: 50%;
  translate: -50% -50%;
  width: min(46rem, 118vmin);
  color: var(--paper);
  opacity: 0.07;
  animation: emblem-breathe 18s ease-in-out infinite;

  & .hero__emblem-arrows { color: var(--ember); opacity: 0.9; }
}

@keyframes drift-a {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(-4%, 5%, 0) scale(1.09); }
}
@keyframes drift-b {
  from { transform: translate3d(0, 0, 0) scale(1.05); }
  to   { transform: translate3d(6%, -4%, 0) scale(0.95); }
}
@keyframes emblem-breathe {
  0%, 100% { opacity: 0.055; rotate: -1.5deg; }
  50%      { opacity: 0.1;   rotate: 1.5deg; }
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 58rem;
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--step-5);
  line-height: 0.94;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  text-wrap: balance;

  & em {
    font-style: italic;
    color: var(--water);
  }
}

.hero__lede {
  max-width: 42ch;
  font-size: var(--step-1);
  line-height: 1.5;
  color: var(--paper-dim);
  margin-bottom: 2.25rem;
  text-wrap: pretty;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.hero__reassure {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  color: color-mix(in oklab, var(--paper-dim) 88%, transparent);
}

.scroll-hint {
  position: absolute;
  z-index: 1;
  inset-block-end: 1.75rem;
  inset-inline-start: var(--gutter);
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-height: 44px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--paper-dim);
  transition: color var(--dur-2) var(--ease);

  & .scroll-hint__line {
    display: block;
    width: 68px;
    height: 1px;
    background: linear-gradient(90deg, var(--water), transparent);
    transform-origin: 0 50%;
    animation: hint-sweep 2.6s var(--ease) infinite;
  }

  &:hover { color: var(--water); }
}

@keyframes hint-sweep {
  0%   { transform: scaleX(0.25); opacity: 0.4; }
  45%  { transform: scaleX(1);    opacity: 1; }
  100% { transform: scaleX(0.25); opacity: 0.4; }
}

@supports (animation-timeline: view()) {
  .scroll-hint {
    animation: fade-away linear both;
    animation-timeline: view();
    animation-range: exit 0% exit 60%;
  }
}

@keyframes fade-away {
  from { opacity: 1; }
  to   { opacity: 0; }
}

/* --------------------------------------------------------------- 07 sections */

/* --- constat --- */

.constat__grid { display: grid; gap: var(--rhythm); }

.frictions { display: grid; gap: 1px; background: color-mix(in oklab, var(--ink-700) 55%, transparent); }

.friction {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem 1.25rem;
  padding: 1.5rem 0.25rem;
  background: var(--ink-900);
  transition: background-color var(--dur-2) var(--ease);

  &:hover { background: color-mix(in oklab, var(--ink-850) 70%, var(--ink-900)); }

  & .friction__num {
    font-family: var(--font-display);
    font-size: var(--step-3);
    line-height: 0.9;
    color: color-mix(in oklab, var(--water) 42%, transparent);
  }

  & .h3 { margin-bottom: 0.6rem; }

  & .friction__problem { color: var(--paper-dim); margin-bottom: 0.75rem; }

  & .friction__answer {
    font-size: var(--step--1);
    color: var(--paper);
    padding-left: 0.9rem;
    border-left: 2px solid color-mix(in oklab, var(--ember) 55%, transparent);
  }
}

/* --- méthode --- */

.principes {
  display: grid;
  gap: 1.25rem;
  margin-bottom: var(--rhythm);
}

.principe {
  --grad-a: transparent;
  --grad-b: transparent;
  position: relative;
  padding: 1.75rem 1.5rem;
  background-color: color-mix(in oklab, var(--ink-850) 80%, transparent);
  background-image: linear-gradient(155deg, var(--grad-a), var(--grad-b) 72%);
  border: 1px solid color-mix(in oklab, var(--ink-700) 85%, transparent);
  border-radius: 2px;
  transition: --grad-a 480ms var(--ease-out), --grad-b 480ms var(--ease-out),
              border-color var(--dur-2) var(--ease), translate var(--dur-2) var(--ease-out);

  &:hover, &:focus-within {
    --grad-a: color-mix(in oklab, var(--water) 13%, transparent);
    --grad-b: transparent;
    border-color: color-mix(in oklab, var(--water) 45%, transparent);
    translate: 0 -3px;
  }

  & .principe__num {
    position: absolute;
    inset-block-start: 1.4rem;
    inset-inline-end: 1.4rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    color: color-mix(in oklab, var(--paper-dim) 60%, transparent);
  }

  & .principe__icon {
    width: 46px;
    height: 46px;
    margin-bottom: 1.35rem;
    color: var(--water);
    fill: none;
    stroke: currentColor;
    stroke-width: 1.6;
    stroke-linecap: round;
    stroke-linejoin: round;
  }

  & .h3 { margin-bottom: 0.55rem; }

  & p { color: var(--paper-dim); font-size: var(--step-0); }

  & em { color: var(--paper); font-style: italic; }
}

.origines {
  padding: 1.75rem var(--gutter) 1.75rem 1.5rem;
  border-left: 2px solid color-mix(in oklab, var(--gold) 50%, transparent);
  background: linear-gradient(90deg, color-mix(in oklab, var(--gold) 6%, transparent), transparent 62%);

  & .origines__title {
    font-family: var(--font-mono);
    font-size: var(--step--1);
    font-weight: 400;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 0.8rem;
  }

  & .origines__text { color: var(--paper-dim); max-width: 56ch; margin-bottom: 1.25rem; }

  & .origines__list {
    display: grid;
    gap: 0.75rem 2rem;

    & li { display: grid; gap: 0.15rem; }
    & strong { font-weight: 600; font-size: var(--step-0); }
    & span { color: var(--paper-dim); font-size: var(--step--1); }
    & em { font-style: italic; }
  }
}

/* --- citations --- */

.quotes { display: grid; gap: 1px; background: color-mix(in oklab, var(--ink-700) 55%, transparent); }

.quote {
  padding: 1.6rem 1.4rem;
  background: var(--ink-900);
  transition: background-color var(--dur-2) var(--ease), opacity var(--dur-2) var(--ease);

  & blockquote p {
    font-family: var(--font-display);
    font-size: var(--step-2);
    line-height: 1.18;
    letter-spacing: -0.012em;
    text-wrap: balance;
    margin-bottom: 0.9rem;

    &::before { content: "\201C"; color: var(--water); }
    &::after { content: "\201D"; color: var(--water); }
  }

  & .quote__vo {
    font-size: var(--step--1);
    font-style: italic;
    color: color-mix(in oklab, var(--paper-dim) 80%, transparent);
    margin-bottom: 0.9rem;
  }

  & figcaption {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--paper-dim);
  }

  & .quote__src {
    display: block;
    text-transform: none;
    letter-spacing: 0.04em;
    color: color-mix(in oklab, var(--paper-dim) 65%, transparent);
  }
}

/* :has() — au survol d'une citation, les autres reculent */
@media (hover: hover) {
  .quotes:has(.quote:hover) .quote:not(:hover) { opacity: 0.42; }
  .quotes:has(.quote:hover) .quote:hover { background: var(--ink-850); }
}

/* --- programmes --- */

.plans { display: grid; gap: 1.25rem; align-items: start; }

.plan {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.75rem 1.5rem;
  background: color-mix(in oklab, var(--ink-850) 75%, transparent);
  border: 1px solid color-mix(in oklab, var(--ink-700) 85%, transparent);
  border-radius: 2px;
  transition: border-color var(--dur-2) var(--ease), translate var(--dur-2) var(--ease-out);

  &:hover { border-color: color-mix(in oklab, var(--paper) 30%, transparent); translate: 0 -3px; }

  & .plan__rhythm {
    font-family: var(--font-mono);
    font-size: var(--step--1);
    color: var(--paper-dim);
    margin-top: 0.3rem;
  }

  & .plan__price {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
    margin-top: 0.5rem;
  }

  & .plan__amount {
    font-family: var(--font-display);
    font-size: var(--step-3);
    line-height: 1;
    color: var(--paper);
  }

  & .plan__period { color: var(--paper-dim); font-size: var(--step--1); }

  & .plan__placeholder {
    margin-top: -0.65rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--gold);
  }

  & .plan__benefits {
    display: grid;
    gap: 0.7rem;
    margin-block: 0.4rem;
    color: var(--paper-dim);
    font-size: var(--step--1);
    line-height: 1.5;

    & li {
      display: grid;
      grid-template-columns: 1rem 1fr;
      gap: 0.65rem;
    }

    & li::before {
      content: "";
      width: 10px;
      height: 10px;
      margin-top: 0.45em;
      border-inline-start: 1.5px solid var(--water);
      border-block-end: 1.5px solid var(--water);
      rotate: -45deg;
      translate: 0 -2px;
    }
  }

  & .plan__cta { margin-top: auto; width: 100%; }
}

/* :has() — la carte qui porte un badge est la carte mise en avant */
.plan:has(.plan__badge) {
  background: color-mix(in oklab, var(--water) 6%, var(--ink-850));
  border-color: color-mix(in oklab, var(--water) 55%, transparent);
  box-shadow: 0 24px 70px -40px color-mix(in oklab, var(--water) 70%, transparent);
}

.plan__badge {
  position: absolute;
  inset-block-start: -0.75rem;
  inset-inline-start: 1.5rem;
  padding: 0.22rem 0.6rem;
  background: var(--water);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-radius: 2px;
}

/* --- repères --- */

.kpis {
  display: grid;
  gap: 1px;
  background: color-mix(in oklab, var(--ink-700) 55%, transparent);
}

.kpi {
  display: grid;
  gap: 0.35rem;
  padding: 1.6rem 1.25rem;
  background: var(--ink-900);
  text-align: center;

  & .kpi__value {
    order: -1;
    font-family: var(--font-display);
    font-size: var(--step-4);
    line-height: 0.95;
    letter-spacing: -0.02em;
    color: var(--water);
    font-variant-numeric: lining-nums;
  }

  & .kpi__label {
    color: var(--paper-dim);
    font-size: var(--step--1);
    line-height: 1.4;
    text-wrap: balance;
  }

  & .kpi__hint {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.08em;
    color: color-mix(in oklab, var(--paper-dim) 65%, transparent);
  }
}

/* --- FAQ --- */

.faq__list { display: grid; gap: 1px; background: color-mix(in oklab, var(--ink-700) 55%, transparent); }

.faq__item {
  background: var(--ink-900);

  & summary {
    display: flex;
    align-items: center;
    gap: 1rem;
    min-height: 56px;
    padding: 1rem 0.25rem;
    cursor: pointer;
    list-style: none;
    font-size: var(--step-1);
    font-weight: 500;
    line-height: 1.3;
    text-wrap: balance;
    transition: color var(--dur-1) var(--ease);

    &::-webkit-details-marker { display: none; }

    & span { flex: 1; }

    &::after {
      content: "";
      flex: none;
      width: 13px;
      height: 13px;
      border-inline-end: 1.5px solid var(--water);
      border-block-end: 1.5px solid var(--water);
      rotate: 45deg;
      translate: 0 -3px;
      transition: rotate var(--dur-2) var(--ease-out), translate var(--dur-2) var(--ease-out);
    }

    &:hover { color: var(--water); }
  }

  &[open] > summary::after { rotate: -135deg; translate: 0 3px; }

  & .faq__answer {
    padding: 0 3rem 1.35rem 0.25rem;
    color: var(--paper-dim);
    max-width: 62ch;
  }
}

/* --- pied de page --- */

.site-footer {
  padding-block: var(--rhythm) calc(var(--rhythm) + 4rem);
  border-top: 1px solid color-mix(in oklab, var(--ink-700) 70%, transparent);
  background: color-mix(in oklab, var(--ink-850) 45%, var(--ink-900));
  scroll-snap-align: start;
}

.site-footer__inner { display: grid; gap: 1.75rem; }

.site-footer__brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--water);

  & .brand__mark { width: 34px; height: 34px; flex: none; }

  & .site-footer__word {
    font-family: var(--font-display);
    font-size: 1.5rem;
    letter-spacing: 0.12em;
    color: var(--paper);
    line-height: 1;
  }

  & .site-footer__name {
    font-family: var(--font-mono);
    font-size: 0.64rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--paper-dim);
  }
}

.site-footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
}

.site-footer__nav a {
  display: inline-grid;
  place-items: center;
  min-height: 44px;
  padding-inline: 0.75rem;
  font-size: var(--step--1);
  color: var(--paper-dim);
  border-radius: 3px;
  transition: color var(--dur-1) var(--ease);

  &:hover { color: var(--water); }
}

.site-footer__legal {
  max-width: 66ch;
  font-size: var(--step--1);
  line-height: 1.55;
  color: color-mix(in oklab, var(--paper-dim) 75%, transparent);
}

/* ---------------------------------------------------------------- 08 charts */

.chart {
  padding: 1.5rem 1.25rem 1.25rem;
  background: color-mix(in oklab, var(--ink-850) 65%, transparent);
  border: 1px solid color-mix(in oklab, var(--ink-700) 80%, transparent);
  border-radius: 2px;
}

.chart__caption {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 1.5rem;
  max-width: 62ch;
}

.chart__title {
  font-family: var(--font-ui);
  font-size: var(--step-1);
  font-weight: 600;
  letter-spacing: -0.008em;
  color: var(--paper);
}

.chart__sub {
  font-size: var(--step--1);
  line-height: 1.5;
  color: var(--paper-dim);
}

/* Le conteneur du chart est le SEUL endroit où un scroll horizontal est permis */
.chart__scroll {
  overflow-x: auto;
  overscroll-behavior-x: contain;
  padding-bottom: 0.25rem;
}

.chart__svg {
  width: 100%;
  min-width: 30rem;
  height: auto;
}

.chart__grid line {
  stroke: color-mix(in oklab, var(--ink-700) 90%, transparent);
  stroke-width: 1;
}

.chart__axis {
  stroke: color-mix(in oklab, var(--paper) 22%, transparent);
  stroke-width: 1;
}

.chart__tick text {
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--paper-dim);
  font-variant-numeric: tabular-nums;
}

.chart__axis-title {
  font-family: var(--font-ui);
  font-size: 11px;
  fill: color-mix(in oklab, var(--paper-dim) 70%, transparent);
  letter-spacing: 0.02em;
}

.chart__label {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  fill: var(--paper);
}

.chart__label-num {
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--paper-dim);
  font-weight: 400;
}

/* CHART A — portées */

#ca-grad stop:nth-child(1) { stop-color: var(--ember); }
#ca-grad stop:nth-child(2) { stop-color: var(--gold); }
#ca-grad stop:nth-child(3) { stop-color: var(--water); }

.chart-a__bar {
  fill: url(#ca-grad);
  transform-box: fill-box;
  transform-origin: left center;
}

/* CHART B — progression */

#cb-fill stop { stop-color: var(--water); }

.chart-b__area { fill: url(#cb-fill); stroke: none; }

.chart-b__line {
  fill: none;
  stroke: var(--water);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.chart-b__dot {
  fill: var(--water);
  stroke: var(--ink-850);
  stroke-width: 2;
}

.chart-b__leader {
  stroke: color-mix(in oklab, var(--paper) 28%, transparent);
  stroke-width: 1;
}

/* ------------------------------------------------------------ 09 formulaire */

.essai__grid { display: grid; gap: var(--rhythm); align-items: start; }

.essai__points {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.75rem;
  color: var(--paper-dim);
  font-size: var(--step--1);

  & li {
    display: grid;
    grid-template-columns: 1rem 1fr;
    gap: 0.65rem;
    align-items: start;
  }

  & li::before {
    content: "";
    width: 10px;
    height: 10px;
    margin-top: 0.5em;
    border-inline-start: 1.5px solid var(--gold);
    border-block-end: 1.5px solid var(--gold);
    rotate: -45deg;
    translate: 0 -2px;
  }
}

.form {
  display: grid;
  gap: 1.1rem;
  padding: 1.75rem 1.5rem;
  background: color-mix(in oklab, var(--ink-850) 85%, transparent);
  border: 1px solid color-mix(in oklab, var(--ink-700) 90%, transparent);
  border-radius: 2px;
  transition: opacity var(--dur-3) var(--ease);
}

.form__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--step-2);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.form__row { display: grid; gap: 0.4rem; }

.form__label {
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--paper);
}

.form__input {
  width: 100%;
  min-height: 48px;
  padding: 0.6rem 0.85rem;
  background: var(--ink-900);
  color: var(--paper);
  border: 1px solid color-mix(in oklab, var(--ink-700) 100%, transparent);
  border-radius: 2px;
  transition: border-color var(--dur-1) var(--ease), background-color var(--dur-1) var(--ease);

  &::placeholder { color: color-mix(in oklab, var(--paper-dim) 55%, transparent); }

  &:hover { border-color: color-mix(in oklab, var(--paper) 26%, transparent); }

  &:focus-visible { border-color: var(--water); outline-offset: 1px; }

  &:user-invalid { border-color: var(--ember); }
}

.form__select {
  appearance: none;
  padding-right: 2.5rem;
  background-image: linear-gradient(45deg, transparent 49%, var(--water) 50%, var(--water) 58%, transparent 59%),
                    linear-gradient(-45deg, transparent 49%, var(--water) 50%, var(--water) 58%, transparent 59%);
  background-repeat: no-repeat;
  background-position: right 1.35rem top 55%, right 0.85rem top 55%;
  background-size: 0.5rem 0.5rem;

  & option { background: var(--ink-850); color: var(--paper); }
}

.form__hint {
  font-size: 0.76rem;
  line-height: 1.45;
  color: color-mix(in oklab, var(--paper-dim) 75%, transparent);
}

.form__legal {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.5;
  color: color-mix(in oklab, var(--paper-dim) 70%, transparent);
}

.form__status {
  display: grid;
  gap: 0.3rem;
  padding: 0.9rem 1rem;
  font-size: var(--step--1);
  line-height: 1.5;
  border-radius: 2px;
  border-left: 2px solid var(--water);
  background: color-mix(in oklab, var(--water) 11%, transparent);
  color: var(--paper);
  opacity: 1;
  translate: 0 0;
  transition: opacity var(--dur-2) var(--ease), translate var(--dur-2) var(--ease-out),
              display var(--dur-2) allow-discrete;

  @starting-style { opacity: 0; translate: 0 8px; }

  &[hidden] { display: none; opacity: 0; }

  &[data-state="error"] {
    border-left-color: var(--ember);
    background: color-mix(in oklab, var(--ember) 12%, transparent);
  }
}

/* :has() — quand la confirmation est affichée, le formulaire recule visuellement */
.form:has(.form__status:not([hidden])) .form__row { opacity: 0.55; }
.form__row { transition: opacity var(--dur-3) var(--ease); }

/* ---------------------------------------------------------------- 10 motion */

/* État par défaut : tout est visible. Les révélations ne masquent rien
   tant qu'un moteur compatible (ou le JS) n'a pas pris la main. */
.reveal { opacity: 1; }

@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      animation: reveal-in linear both;
      animation-timeline: view();
      animation-range: entry 4% entry 46%;
    }

    /* Cascade : on décale la plage, pas le délai (les délais temporels
       n'ont pas de sens sur une timeline de scroll). */
    .stagger .reveal {
      animation-range: calc(entry 4% + var(--i, 0) * 3%) calc(entry 46% + var(--i, 0) * 3%);
    }
  }
}

@supports not (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .js .reveal {
      opacity: 0;
      translate: 0 16px;
      transition: opacity var(--dur-3) var(--ease-out), translate var(--dur-3) var(--ease-out);
      transition-delay: calc(var(--i, 0) * 80ms);
    }

    .js .reveal.is-in { opacity: 1; translate: 0 0; }
  }
}

@keyframes reveal-in {
  from { opacity: 0; translate: 0 16px; }
  to   { opacity: 1; translate: 0 0; }
}

/* Animation d'entrée des charts, pilotée par IntersectionObserver.
   Sans JS, la classe --anim n'est jamais posée : les charts sont dessinés. */
@media (prefers-reduced-motion: no-preference) {
  .chart--anim {
    & .chart-a__bar { transform: scaleX(0); }
    & .chart-b__line { stroke-dasharray: 1; stroke-dashoffset: 1; }
    & .chart-b__area { opacity: 0; }
    & .chart-b__dot { scale: 0; transform-box: fill-box; transform-origin: center; }
    & .chart-b__leader, & .chart-b__marks text { opacity: 0; }
  }

  .chart--anim.is-in {
    & .chart-a__bar {
      transform: scaleX(1);
      transition: transform 720ms var(--ease-out);
      transition-delay: calc(var(--i, 0) * 110ms);
    }

    & .chart-b__line {
      stroke-dashoffset: 0;
      transition: stroke-dashoffset 1200ms var(--ease-out);
    }

    & .chart-b__area {
      opacity: 1;
      transition: opacity 900ms var(--ease) 400ms;
    }

    & .chart-b__dot {
      scale: 1;
      transition: scale 420ms var(--ease-out);
      transition-delay: calc(360ms + var(--i, 0) * 200ms);
    }

    & .chart-b__leader, & .chart-b__marks text {
      opacity: 1;
      transition: opacity 420ms var(--ease);
      transition-delay: calc(480ms + var(--i, 0) * 200ms);
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
  }

  .hero__orb, .hero__emblem, .scroll-hint__line { animation: none !important; }
  .reveal { opacity: 1 !important; translate: none !important; }
}

/* ------------------------------------------------------------ 11 responsive */

@media (min-width: 40rem) {
  .chart { padding: 1.75rem 1.75rem 1.5rem; }

  .frictions .friction {
    grid-template-columns: 5rem 1fr;
    padding: 1.9rem 0.5rem;
    gap: 1.5rem;
  }

  .origines__list { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .quotes { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .sticky-cta { inset-inline-start: auto; inset-inline-end: 1.25rem; }
}

@media (min-width: 60rem) {
  .topnav { display: block; }
  .topbar__cta { display: inline-grid; min-height: 44px; padding: 0.55rem 1.1rem; font-size: var(--step--1); }

  .constat__grid { grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); align-items: start; }
  .constat__head { position: sticky; top: calc(var(--nav-h) + 2rem); }

  .principes { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .plans { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .kpis { grid-template-columns: repeat(4, minmax(0, 1fr)); }

  .essai__grid { grid-template-columns: minmax(0, 1fr) minmax(0, 26rem); gap: calc(var(--rhythm) * 1.2); }
  .essai__pitch { position: sticky; top: calc(var(--nav-h) + 2rem); }

  .chart__svg { min-width: 0; }
}

@media (min-width: 64rem) {
  .rail { display: block; }
  .wrap { padding-inline: max(var(--gutter), 4.5rem); }
  .sticky-cta { inset-inline-end: 5.5rem; }
}

/* Sous 24rem on relâche encore la gouttière pour ne jamais coller au bord */
@media (max-width: 23.5rem) {
  :root { --gutter: 1rem; }
}