/* ---------------------------------------------------------------------------
   case study program — main.css
   near-black canvas, off-white type, lots of negative space.
   édite les tokens ci-dessous pour la direction visuelle.
--------------------------------------------------------------------------- */

/* Aspekta — police du projet. déposer les fichiers dans assets/fonts/
   (voir assets/fonts/README.md). fichier variable prioritaire, sinon statiques. */
@font-face {
  font-family: "Aspekta";
  src: url("../assets/fonts/Aspekta-VF.woff2") format("woff2-variations"),
       url("../assets/fonts/Aspekta-VF.woff2") format("woff2");
  font-weight: 100 1000;
  font-display: swap;
}
@font-face {
  font-family: "Aspekta";
  src: url("../assets/fonts/Aspekta-400.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Aspekta";
  src: url("../assets/fonts/Aspekta-500.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: "Aspekta";
  src: url("../assets/fonts/Aspekta-700.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}

:root {
  --bg: #0b0b0c;
  --fg: #ededed;
  --fg-dim: #8a8a8f;
  --line: #2a2a2e;
  --accent: #ededed;

  --font: "Aspekta", system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  /* libellés techniques (wordmark, codes de bulle) : même police, tracking élargi
     réglé règle par règle. change ici pour repasser en vraie mono si besoin. */
  --mono: "Aspekta", system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;

  --pad: clamp(1.25rem, 4vw, 3rem);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.wordmark {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  text-decoration: none;
  color: var(--fg);
}

/* ===== page 1 — accueil ================================================== */
/* réseau de bulles "molécules" sur fond clair. un seul écran, pas de scroll. */
.page-home {
  --home-bg: #ffffff;   /* fond blanc */
  --home-ink: #101010;  /* contour des ronds + traits */
  --home-dim: #9a978d;  /* labels de repli */

  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  background: var(--home-bg);
  color: var(--home-ink);
}

/* écran de chargement */
.loader {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  background: var(--home-bg);
  transition: opacity 0.5s ease;
}
.loader.is-done { opacity: 0; pointer-events: none; }

.loader__logo {
  height: 38px;
  width: auto;
  mix-blend-mode: multiply;
  animation: loader-pulse 1.7s ease-in-out infinite;
}
.loader__fallback {
  font-family: var(--font);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  color: var(--home-ink);
  animation: loader-pulse 1.7s ease-in-out infinite;
}
@keyframes loader-pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .loader__logo, .loader__fallback { animation: none; }
}

.molecules {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
}

.molecules__svg {
  width: min(100vw, 100vh);
  height: min(100vw, 100vh);
  overflow: visible;
}

.mol-link {
  stroke: var(--home-ink);
  stroke-width: 1;              /* px réels grâce à non-scaling-stroke */
  vector-effect: non-scaling-stroke;
  opacity: 0.4;
}

.mol-bubble {
  fill: var(--home-bg);    /* opaque : masque les traits qui passent derrière */
  stroke: var(--home-ink);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
  transition: stroke-width 0.18s ease;
}
.mol-node--root .mol-bubble {
  stroke-width: 1.4;
  vector-effect: non-scaling-stroke;
}

/* bulle "à venir" (node avec un status) : contour pointillé */
.mol-node--soon .mol-bubble { stroke-dasharray: 2.4 2.4; }
.mol-node--soon .mol-label { fill: var(--home-dim); }

/* état survolé : la bulle se fige (js) + contour renforcé */
.mol-node.is-hover .mol-bubble { stroke-width: 2.4; }

.mol-label {
  fill: var(--home-dim);
  font-family: var(--mono);
  font-size: 2.4px;
  letter-spacing: 0.04em;
}
.mol-node--root .mol-label {
  fill: var(--home-ink);
  font-size: 2.8px;
}

/* wordmark + entrée : flottants dans les coins */
.home__mark {
  position: fixed;
  left: var(--pad);
  bottom: var(--pad);
  z-index: 2;
  color: var(--home-ink);
  text-decoration: none;
  line-height: 0;
}

.home__logo {
  display: block;
  height: 26px;
  width: auto;
  /* le logo est un JPEG (fond blanc) : multiply efface le blanc sur fond clair,
     garde le tracé noir. remplace par un PNG/SVG transparent quand tu l'as. */
  mix-blend-mode: multiply;
}

/* repli texte : affiché uniquement si l'image ne charge pas (classe .logo-missing
   posée par l'attribut onerror de l'<img>) */
.home__mark-fallback {
  display: none;
  font-family: var(--font);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--home-ink);
}
.home__mark.logo-missing .home__logo { display: none; }
.home__mark.logo-missing .home__mark-fallback { display: inline; }

/* sélecteur de page — haut-centre */
.home__switch {
  position: fixed;
  top: var(--pad);
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  gap: 0.9rem;
  /* mêmes fond + padding que .arch__switch / .cat__switch -> pas de saut au changement de page */
  background: var(--home-bg);
  padding: 0.5rem 0.8rem;
  font-family: var(--font);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.home__switch a,
.home__switch span {
  color: var(--home-dim);
  text-decoration: none;
  transition: color 0.2s ease;
}
.home__switch a:hover,
.home__switch .is-current { color: var(--home-ink); }

/* CTA son — haut droite, persistant (toutes les pages).
   fond blanc + padding pour rester lisible quand du contenu défile derrière. */
.sound-toggle {
  position: fixed;
  top: var(--pad);
  right: var(--pad);
  z-index: 9;
  padding: 0.5rem 0.8rem;
  background: #ffffff;
  border: 0;
  font-family: var(--font);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: #8a8a8f;
  cursor: pointer;
  transition: color 0.2s ease;
}
.sound-toggle:hover,
.sound-toggle[aria-pressed="true"] { color: #111111; }

/* fiche projet (clic sur une bulle) — bas droite, minimaliste.
   l'apparition (fiche + textes) est animée par GSAP dans js/home.js */
.hcard {
  position: fixed;
  right: var(--pad);
  bottom: var(--pad);
  z-index: 5;
  width: min(320px, calc(100vw - 2 * var(--pad)));
  padding: 1.05rem 1.15rem 1.2rem;
  background: var(--home-bg);
  color: var(--home-ink);
  font-family: var(--font);
}
.hcard[hidden] { display: none; }

.hcard__title {
  overflow: hidden;             /* masque pour le reveal du titre (yPercent) */
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0.01em;
}

.hcard__status {
  margin: -0.25rem 0 0.6rem;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--home-dim);
}
.hcard__status[hidden] { display: none; }

.hcard__desc {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--home-dim);
  will-change: transform, opacity;
}

.hcard__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 0.9rem;
}
.hcard__links:empty { display: none; }

.hcard__links a {
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: lowercase;
  text-decoration: none;
  color: var(--home-ink);
  padding-bottom: 1px;
  border-bottom: 1px solid rgba(16, 16, 16, 0.25);
  transition: border-color 0.18s ease;
}
.hcard__links a:hover { border-color: var(--home-ink); }

/* bulle sélectionnée (fiche ouverte) : contour renforcé, se fige (js) */
.mol-node.is-selected .mol-bubble { stroke-width: 2.4; }

/* ===== page 2 — universe =============================================== */
.page-universe {
  min-height: 100vh;
  min-height: 100dvh;
}

.uni__head {
  padding: var(--pad);
  position: absolute;
  top: 0; left: 0;
  z-index: 3;
}

.tree {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
}

.tree__svg {
  width: min(100%, 1100px);
  height: 100%;
}

.edge {
  stroke: var(--line);
  stroke-width: 1;
}

.node circle {
  fill: #141416;
  stroke: var(--fg-dim);
  stroke-width: 1;
  transition: fill 0.2s ease, stroke 0.2s ease;
}
.node--root circle {
  fill: #17171a;
  stroke: var(--fg);
}
.node:hover circle,
.node:focus circle {
  fill: #202024;
  stroke: var(--fg);
  outline: none;
}

.node__label {
  fill: var(--fg-dim);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}
.node--root .node__label { fill: var(--fg); }

/* panneau de lecture */
.readout {
  position: fixed;
  right: var(--pad);
  bottom: var(--pad);
  z-index: 4;
  max-width: 340px;
  padding: 1.25rem 1.25rem 1.4rem;
  background: rgba(20, 20, 22, 0.92);
  border: 1px solid var(--line);
  backdrop-filter: blur(6px);
}

.readout__close {
  position: absolute;
  top: 0.6rem;
  right: 0.75rem;
  background: none;
  border: none;
  color: var(--fg-dim);
  font-family: var(--mono);
  font-size: 0.7rem;
  cursor: pointer;
}
.readout__close:hover { color: var(--fg); }

.readout__title {
  margin: 0 0 0.6rem;
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.readout__body {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--fg-dim);
}

.readout__link {
  display: inline-block;
  margin-top: 0.9rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid var(--fg-dim);
}

/* fallback mobile — masqué par défaut */
.stack { display: none; }

/* ===== mobile ========================================================== */
@media (max-width: 720px) {
  .tree { display: none; }
  .readout { display: none; }

  .stack {
    display: block;
    padding: calc(var(--pad) + 2.5rem) var(--pad) var(--pad);
  }
  .stack__intro {
    font-family: var(--mono);
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--fg);
    margin: 0 0 2rem;
  }
  .stack__list { list-style: none; margin: 0; padding: 0; }
  .stack__node {
    padding: 1.1rem 0;
    border-top: 1px solid var(--line);
  }
  .stack__node--root { border-top: none; }
  .stack__label,
  .stack summary {
    font-family: var(--mono);
    font-size: 0.9rem;
    letter-spacing: 0.02em;
    cursor: pointer;
  }
  .stack summary { list-style: none; }
  .stack summary::-webkit-details-marker { display: none; }
  .stack summary::after { content: " +"; color: var(--fg-dim); }
  .stack details[open] summary::after { content: " –"; }
  .stack__blurb {
    margin: 0.7rem 0 0;
    font-size: 0.88rem;
    line-height: 1.55;
    color: var(--fg-dim);
  }
  .stack__link {
    display: inline-block;
    margin-top: 0.7rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    border-bottom: 1px solid var(--fg-dim);
    text-decoration: none;
  }

  .frame--f, .frame--e { display: none; }
}

/* ===== page archive ================================================== */
/* espace d'images librement navigable (pan tous sens) sur fond blanc */
.page-archive {
  --arch-bg: #ffffff;
  --arch-ink: #111111;
  --arch-dim: #8a8a8f;

  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  background: var(--arch-bg);
  color: var(--arch-ink);
}

.arch__switch {
  position: fixed;
  top: var(--pad);
  left: 50%;
  transform: translateX(-50%);
  z-index: 6;
  display: flex;
  gap: 0.9rem;
  /* fond blanc : reste lisible quand les images défilent derrière */
  background: var(--arch-bg);
  padding: 0.5rem 0.8rem;
  font-family: var(--font);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.arch__switch a,
.arch__switch span { color: var(--arch-dim); text-decoration: none; transition: color 0.2s ease; }
.arch__switch a:hover,
.arch__switch .is-current { color: var(--arch-ink); }

.space {
  position: absolute;
  inset: 0;
  overflow: hidden;
  cursor: grab;
  touch-action: none;            /* on gère le geste nous-mêmes */
}
.space.is-grabbing { cursor: grabbing; }

.space__plane {
  position: absolute;
  top: 0;
  left: 0;
}
/* on ne "prévient" le navigateur que pendant le geste : un will-change permanent
   sur un plan bien plus grand que l'écran force une couche GPU géante que le
   navigateur re-rasterise par bandes -> "flashs blancs" pendant le déplacement */
.space.is-grabbing .space__plane { will-change: transform; }

.space__tile {
  position: absolute;
  top: 0;
  left: 0;
}

.space__item {
  position: absolute;
  margin: 0;
  overflow: hidden;
  background: #efefef;
  /* pas de content-visibility : sur un mur qu'on fait défiler vite, il fait
     "pop" les images en blanc quand elles rentrent dans le viewport
     (effet "ça recharge"). Le mur est déjà borné (viewport + 2 tuiles) et les
     <img> sont loading="lazy", donc le coût reste maîtrisé. */
  contain: layout paint style;
}
/* variété de gris tant que les vraies images ne sont pas là */
.space__item.is-ph:nth-child(3n)   { background: #e9e9e9; }
.space__item.is-ph:nth-child(3n+1) { background: #f3f3f3; }
.space__item.is-ph:nth-child(4n+2) { background: #ededed; }
.space__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  -webkit-user-drag: none;
  user-select: none;
}
/* pas d'effet au survol : on navigue, on ne "touche" pas les images.
   contour uniquement au focus clavier (accessibilité). */
.space__item:focus-visible { outline: 1px solid var(--arch-ink); outline-offset: 2px; }

.space__ph {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 0.5rem;
  text-align: center;
  font-family: var(--font);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #a3a3a3;
}

.space__hint {
  position: fixed;
  left: 50%;
  bottom: var(--pad);
  transform: translateX(-50%);
  z-index: 6;
  margin: 0;
  background: var(--arch-bg);
  padding: 0.4rem 0.7rem;
  font-family: var(--font);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--arch-dim);
  transition: opacity 0.4s ease;
}
.space__hint.is-hidden { opacity: 0; }

/* agrandissement */
.lb {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.98);
}
.lb[hidden] { display: none; }

.lb__frame { margin: 0; display: grid; place-items: center; }
.lb__img {
  max-width: 82vw;
  max-height: 82vh;
  object-fit: contain;
  display: block;
}
.lb__img[hidden] { display: none; }
.lb__ph {
  width: min(60vw, 420px);
  aspect-ratio: 3 / 4;
  display: grid;
  place-items: center;
  background: #f1f1f1;
  font-family: var(--font);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #a3a3a3;
}
.lb__ph[hidden] { display: none; }

.lb__name {
  position: fixed;
  left: var(--pad);
  bottom: var(--pad);
  margin: 0;
  font-family: var(--font);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--arch-dim);
}
.lb__close {
  position: fixed;
  top: var(--pad);
  right: var(--pad);
  padding: 0;
  background: none;
  border: 0;
  font-family: var(--font);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--arch-dim);
  cursor: pointer;
  transition: color 0.2s ease;
}
.lb__close:hover { color: var(--arch-ink); }

.lb__edge {
  position: fixed;
  top: 0;
  bottom: 0;
  width: 22%;
  background: none;
  border: 0;
  cursor: pointer;
}
.lb__edge--prev { left: 0; }
.lb__edge--next { right: 0; }

/* ===== page catalog ============================================== */
/* discothèque : carrousel de pochettes (coverflow), fond blanc */
.page-catalog {
  --cat-bg: #ffffff;
  --cat-ink: #111111;
  --cat-dim: #8a8a8f;
  --cat-line: rgba(17, 17, 17, 0.11);
  --cf-size: min(56vh, 60vw, 440px);

  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  background: var(--cat-bg);
  color: var(--cat-ink);
}

.cat__switch {
  position: fixed;
  top: var(--pad);
  left: 50%;
  transform: translateX(-50%);
  z-index: 8;
  display: flex;
  gap: 0.9rem;
  background: var(--cat-bg);
  padding: 0.5rem 0.8rem;
  font-family: var(--font);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.cat__switch a,
.cat__switch span { color: var(--cat-dim); text-decoration: none; transition: color 0.2s ease; }
.cat__switch a:hover,
.cat__switch .is-current { color: var(--cat-ink); }

/* ---- carrousel (coverflow) ---- */
.cf {
  position: fixed;
  inset: 0;
  overflow: hidden;
  cursor: grab;
  touch-action: pan-y;
  user-select: none;
}
.cf.is-dragging { cursor: grabbing; }

.cf__stage {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.cf__item {
  position: absolute;
  top: 47%;
  left: calc(50% + var(--x, 0px));
  width: calc(var(--cf-size) * var(--s, 1));
  height: calc(var(--cf-size) * var(--s, 1));
  pointer-events: auto;
  transform: translate(-50%, -50%);   /* centrage (suit la taille en %) */
  opacity: var(--o, 1);
  transition:
    left 0.55s cubic-bezier(0.22, 0.8, 0.2, 1),
    width 0.55s cubic-bezier(0.22, 0.8, 0.2, 1),
    height 0.55s cubic-bezier(0.22, 0.8, 0.2, 1),
    opacity 0.45s ease;
}
.cf.is-dragging .cf__item { transition: opacity 0.2s ease; }

.cf__item .album__cover { width: 100%; height: 100%; }
.cf__item.is-active .album__cover { box-shadow: 0 34px 80px -34px rgba(0, 0, 0, 0.4); }

/* ---- pochette (partagée : carrousel + reflet holographique) ---- */
.album__cover {
  position: relative;
  display: block;
  margin: 0;
  padding: 0;
  appearance: none;
  border: 1px solid var(--cat-line);
  background: #efefef;
  overflow: hidden;
  cursor: pointer;
  transform: perspective(1000px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.4s ease;
  will-change: transform;
}
.album__cover.is-tilting {
  transition: box-shadow 0.4s ease;      /* suit le curseur sans latence */
}

.album__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  -webkit-user-drag: none;
  user-select: none;
}

.album__ph {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 0.6rem;
  text-align: center;
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  color: #a3a3a3;
}

/* reflet glossy + fine irisation, suit la souris via --mx/--my */
.album__gloss {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
  background:
    radial-gradient(circle at var(--mx, 50%) var(--my, 50%),
      rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0) 42%),
    linear-gradient(105deg,
      rgba(140, 190, 255, 0) 40%,
      rgba(140, 190, 255, 0.13) 47%,
      rgba(255, 150, 210, 0.13) 52%,
      rgba(150, 255, 210, 0.11) 57%,
      rgba(150, 255, 210, 0) 64%);
  background-size: 100% 100%, 260% 100%;
  background-position: 0 0, calc(var(--mx, 50%) * 1.7) 0;
  mix-blend-mode: soft-light;
}
.album__cover.is-tilting .album__gloss { opacity: 1; transition: none; }

/* ---- méta de l'album centré ---- */
.cf__meta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: calc(var(--pad) + 0.3rem);
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  text-align: center;
  pointer-events: none;
  font-family: var(--font);
}
.cf__title { font-size: 0.9rem; color: var(--cat-ink); }
.cf__sub {
  font-size: 0.66rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--cat-dim);
}
.cf__link {
  pointer-events: auto;
  margin-top: 0.35rem;
  font-size: 0.66rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--cat-dim);
  border-bottom: 1px solid rgba(17, 17, 17, 0.25);
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.cf__link:hover { color: var(--cat-ink); border-color: var(--cat-ink); }
.cf__link[hidden] { display: none; }

@media (max-width: 640px) {
  .page-catalog { --cf-size: min(44vh, 78vw, 340px); }
}

/* sélecteurs de page — labels insécables + rétréci sur petit écran (3 items) */
.home__switch a, .home__switch span,
.arch__switch a, .arch__switch span,
.cat__switch a, .cat__switch span { white-space: nowrap; }

@media (max-width: 520px) {
  .home__switch, .arch__switch, .cat__switch {
    font-size: 0.62rem;
    gap: 0.6rem;
    letter-spacing: 0.06em;
    /* plus de centrage : calé à gauche pour ne pas passer sous le CTA son */
    left: var(--pad);
    transform: none;
  }
  /* CTA son plus compact sur mobile */
  .sound-toggle {
    padding: 0.4rem 0.55rem;
    font-size: 0.62rem;
    letter-spacing: 0.06em;
  }
  /* logo "case study program" du bas masqué sur mobile */
  .home__mark { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}