/* ═══════════════════════════════════════════════════════
   Pavillon biochar — fusain sur papier

   Aucune couleur d'accent : l'interface est monochrome,
   comme un dessin au charbon. Toute la couleur du site
   vient des photographies.
   ═══════════════════════════════════════════════════════ */

:root {
  --paper:   #F2F1EE;
  --white:   #FBFBFA;
  --ink:     #111110;
  --ink-2:   #34342F;
  --grey:    #6A6A63;
  --rule:    #C9C8C1;
  --rule-2:  #E6E5E0;

  /* espace — multiples de 8, généreux */
  --s1: 8px;   --s2: 16px;  --s3: 24px;  --s4: 32px;
  --s5: 48px;  --s6: 64px;  --s7: 96px;  --s8: 128px;
  --s9: 176px; --s10: 240px;

  --sans: "Courier Prime", "Courier New", ui-monospace, monospace;

  --wrap: 1240px;
  --ease: cubic-bezier(.22,.61,.36,1);
  --out:  cubic-bezier(.16,1,.3,1);
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  font-synthesis-weight: none;
}

/* ─── racines, en fond de page ───────────────────────── */
/* Le SVG est un enfant de <main> et couvre toute la largeur. Il se place
   au-dessus des fonds de section mais SOUS le contenu : d'où une opacité
   bien plus faible que lorsqu'il vivait dans les gouttières. */
main { position: relative; }
.section { position: relative; }

.roots {
  position: absolute; left: 0;   /* top/height/width posés en ligne par le script */
  pointer-events: none; z-index: 1;
  fill: none; stroke: var(--ink); stroke-linecap: round;
  opacity: .11;
}

/* le contenu passe au-dessus des racines, qui passent au-dessus des fonds */
.section > .wrap, .section > figure, .section > .viewer,
.section > .gallery, .section > .layers { position: relative; z-index: 2; }

@media (max-width: 699px) { .roots { display: none; } }

/* grain de papier, très discret */
body::after {
  content: ""; position: fixed; inset: 0; z-index: 999;
  pointer-events: none; opacity: .035;
  background-image: url("assets/img/grain.png");
  background-size: 200px 200px;
}

img { max-width: 100%; height: auto; display: block; }
sup { line-height: 0; font-size: .68em; vertical-align: super; }
i  { font-style: italic; }
b  { font-weight: 700; font-style: normal; }
::selection { background: var(--ink); color: var(--paper); }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}
.skip {
  position: absolute; left: var(--s2); top: -100px; z-index: 1000;
  background: var(--ink); color: var(--paper);
  padding: var(--s2) var(--s3); text-decoration: none; font-size: 14px;
  transition: top .25s var(--ease);
}
.skip:focus { top: var(--s2); }
:focus-visible { outline: 1.5px solid var(--ink); outline-offset: 4px; }
.hero :focus-visible, .foot :focus-visible { outline-color: var(--white); }

/* ─── trame ──────────────────────────────────────────── */
.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--s3); }
@media (min-width: 900px) { .wrap { padding-inline: var(--s6); } }

.section { padding-block: var(--s8); }
@media (min-width: 900px) { .section { padding-block: var(--s10); } }

/* ─── typographie ────────────────────────────────────── */
.eyebrow {
  display: flex; align-items: center; gap: var(--s2);
  font-size: 12px; font-weight: 400;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--grey); margin: 0 0 var(--s6);
}
.eyebrow .num {
  display: grid; place-items: center;
  width: 26px; height: 26px; flex: none;
  border: 1px solid var(--rule); border-radius: 50%;
  font-size: 10px; letter-spacing: .04em; color: var(--ink);
}

.display {
  font-size: clamp(1.875rem, 5.4vw, 4.25rem);
  font-weight: 400; line-height: 1.06; letter-spacing: -.045em;
  margin: 0;
}

h2 {
  font-size: clamp(1.25rem, 2.5vw, 2.125rem);
  font-weight: 400; line-height: 1.22; letter-spacing: -.035em;
  margin: 0;
  text-wrap: balance;
}

h3 { font-size: 1rem; font-weight: 700; margin: 0 0 var(--s1); letter-spacing: -.01em; }

p { margin: 0 0 var(--s3); max-width: 48ch; }
p:last-child { margin-bottom: 0; }

/* titre à gauche, respiration au centre, texte court à droite */
.lede-row { display: grid; gap: var(--s5); }
@media (min-width: 900px) {
  .lede-row {
    grid-template-columns: 1.6fr 1fr;
    gap: var(--s8); align-items: start;
  }
}
@media (min-width: 1200px) { .lede-row { gap: var(--s9); } }
.lede-side { padding-top: var(--s2); }
.lede-side p { font-size: .9375rem; color: var(--ink-2); max-width: 40ch; }

figcaption {
  font-size: 13px; line-height: 1.5; color: var(--grey);
  margin-top: var(--s2);
}
figcaption b { display: block; color: var(--ink); font-size: 14px; }

/* ─── navigation ─────────────────────────────────────── */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  transition: transform .5s var(--out), background .4s var(--ease);
}
.nav.is-stuck {
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(14px);
}
.nav.is-hidden { transform: translateY(-101%); }
.nav-in {
  max-width: var(--wrap); margin-inline: auto;
  padding: var(--s3);
  display: flex; align-items: center; justify-content: space-between; gap: var(--s3);
}
@media (min-width: 900px) { .nav-in { padding-inline: var(--s6); } }

.nav-mark {
  display: inline-flex; align-items: center; gap: var(--s1);
  color: var(--ink); text-decoration: none;
  font-size: 13px; font-weight: 700; letter-spacing: -.01em;
}
.nav-links { display: none; gap: var(--s4); }
.nav-links a {
  position: relative; color: var(--grey); text-decoration: none;
  font-size: 13px; padding-block: 4px;
  transition: color .3s var(--ease);
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: left;
  transition: transform .5s var(--out);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after, .nav-links a.is-active::after { transform: scaleX(1); }
.nav-links a.is-active { color: var(--ink); }
@media (min-width: 820px) { .nav-links { display: flex; } }

/* le hero est sombre : la nav s'y inverse */
.nav.on-dark .nav-mark, .nav.on-dark .nav-links a.is-active { color: var(--white); }
.nav.on-dark .nav-links a { color: rgba(251,251,250,.66); }
.nav.on-dark .nav-links a:hover { color: var(--white); }

/* ─── hero ───────────────────────────────────────────── */
.hero {
  position: relative; min-height: 100svh;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: var(--s9) var(--s3) var(--s5);
  overflow: hidden; background: var(--ink);
}
@media (min-width: 900px) { .hero { padding-inline: var(--s6); padding-bottom: var(--s6); } }

.hero-media { position: absolute; inset: -5% 0; will-change: transform; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.hero-media::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(12,12,10,.50) 0%, rgba(12,12,10,.05) 30%, rgba(12,12,10,.88) 100%),
    linear-gradient(100deg, rgba(12,12,10,.62) 0%, rgba(12,12,10,.18) 46%, transparent 72%);
}
.hero-body {
  position: relative; width: 100%; max-width: var(--wrap);
  margin-inline: auto; color: var(--white);
}
.hero-sub {
  font-size: clamp(.9375rem, 1.25vw, 1.0625rem);
  color: rgba(251,251,250,.86); max-width: 40ch;
  margin: var(--s4) 0 0;
}
.hero-meta {
  position: relative; width: 100%; max-width: var(--wrap);
  margin: var(--s7) auto 0; padding-top: var(--s3);
  border-top: 1px solid rgba(251,251,250,.20);
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--s2);
  font-size: 12px; letter-spacing: .1em; text-transform: uppercase;
  color: rgba(251,251,250,.72);
}
.hero-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: currentColor; opacity: .5; }

/* ─── titres animés par ligne ────────────────────────── */
.line { display: block; overflow: hidden; }
.line > span { display: block; will-change: transform; }
.anim .line > span {
  transform: translateY(105%);
  transition: transform .95s var(--out);
  transition-delay: calc(var(--i, 0) * 90ms);
}
.anim.is-in .line > span { transform: none; }

/* ─── image pleine largeur ───────────────────────────── */
.bleed { margin: var(--s9) 0 0; }
.bleed img { width: 100%; }
.bleed figcaption {
  max-width: var(--wrap); margin-inline: auto;
  padding-inline: var(--s3);
}
@media (min-width: 900px) { .bleed figcaption { padding-inline: var(--s6); } }

/* ─── citation ───────────────────────────────────────── */
.pull { margin: var(--s9) 0 0; max-width: 900px; }
.pull p {
  font-size: clamp(1.125rem, 2.1vw, 1.625rem);
  font-weight: 400; line-height: 1.4; letter-spacing: -.03em;
  max-width: none; margin-bottom: var(--s4);
}
.pull cite {
  display: block; font-style: normal; font-size: 12px;
  letter-spacing: .1em; text-transform: uppercase; color: var(--grey);
  padding-top: var(--s3); border-top: 1px solid var(--rule);
}

/* ─── dépliage ───────────────────────────────────────── */
.more { margin-top: var(--s4); }
.more-btn {
  display: inline-flex; align-items: center; gap: var(--s2);
  padding: var(--s1) 0; background: none; border: 0; cursor: pointer;
  color: var(--ink); font: inherit; font-size: 13px;
  transition: gap .45s var(--out);
}
.more-btn:hover { gap: var(--s3); }
.more-ico { position: relative; width: 11px; height: 11px; flex: none; }
.more-ico::before, .more-ico::after {
  content: ""; position: absolute; inset: 50% 0 auto 0; height: 1px;
  background: currentColor; transition: transform .5s var(--out);
}
.more-ico::after { transform: rotate(90deg); }
.more-btn[aria-expanded="true"] .more-ico::after { transform: rotate(0deg); }

.more-body {
  display: grid; grid-template-rows: 0fr; opacity: 0;
  transition: grid-template-rows .6s var(--out), opacity .5s var(--ease);
}
.more-btn[aria-expanded="true"] + .more-body { grid-template-rows: 1fr; opacity: 1; }
.more-inner { overflow: hidden; }
.more-inner > *:first-child { padding-top: var(--s3); }

/* ─── échantillons ───────────────────────────────────── */
.specimens { display: grid; gap: var(--s5); margin-top: var(--s9); }
@media (min-width: 700px) { .specimens { grid-template-columns: 1fr 1fr; gap: var(--s7); } }
.spec { margin: 0; }
.spec img {
  width: 100%; aspect-ratio: 4/5; object-fit: cover;
  filter: grayscale(.12);
  transition: filter .7s var(--ease), transform 1s var(--out);
}
.spec:hover img { filter: none; transform: scale(1.012); }

/* ─── propriétés dépliables ──────────────────────────── */
.traits { list-style: none; margin: var(--s9) 0 0; padding: 0; border-top: 1px solid var(--rule); }
.traits li { border-bottom: 1px solid var(--rule); }
.trait {
  display: block; width: 100%; text-align: left; cursor: pointer;
  background: none; border: 0; padding: var(--s4) 0; font: inherit; color: inherit;
  transition: padding-left .5s var(--out);
}
.trait:hover { padding-left: var(--s2); }
.trait-h {
  display: block; font-size: clamp(1.0625rem, 1.9vw, 1.375rem);
  font-weight: 400; letter-spacing: -.025em;
}
.trait-body {
  display: grid; grid-template-rows: 0fr; opacity: 0;
  transition: grid-template-rows .6s var(--out), opacity .5s var(--ease);
}
.trait[aria-expanded="true"] .trait-body { grid-template-rows: 1fr; opacity: 1; }
.trait-in { overflow: hidden; display: block; max-width: 52ch; color: var(--ink-2); font-size: 15px; }
.trait[aria-expanded="true"] .trait-in { padding-top: var(--s2); }

/* ─── visualiseur 3D — étude au graphite ─────────────── */
.section-pavillon { background: var(--white); }
.viewer { margin-top: var(--s8); }
.viewer-stage {
  position: relative; width: 100%; max-width: 100%;
  aspect-ratio: 3/2; min-height: 340px;
}
@media (min-width: 900px) { .viewer-stage { aspect-ratio: 21/9; min-height: 560px; } }
#scene { display: block; width: 100%; height: 100%; touch-action: none; cursor: grab; }
#scene:active { cursor: grabbing; }
.viewer-loading {
  position: absolute; inset: 0; margin: 0; display: grid; place-content: center;
  font-size: 12px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--grey); pointer-events: none; transition: opacity .6s var(--ease);
}
.viewer-loading.is-gone { opacity: 0; }

.layers {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 0;
  max-width: var(--wrap); margin: var(--s6) auto 0;
  padding-inline: var(--s3); border-top: 1px solid var(--rule);
}
.layer {
  position: relative; display: inline-flex; align-items: baseline; gap: var(--s1);
  padding: var(--s3) var(--s3); min-height: 48px;
  background: none; border: 0; cursor: pointer;
  font: inherit; font-size: 14px; color: var(--grey);
  transition: color .35s var(--ease);
}
.layer::before {
  content: ""; position: absolute; left: 0; right: 0; top: -1px; height: 1px;
  background: var(--ink); transform: scaleX(0);
  transition: transform .55s var(--out);
}
.layer:hover { color: var(--ink); }
.layer.is-on { color: var(--ink); }
.layer.is-on::before { transform: scaleX(1); }
.layer-n { font-size: 10px; letter-spacing: .1em; color: var(--grey); }
.layer.is-on .layer-n { color: var(--ink); }

.viewer-hint {
  text-align: center; font-size: 12px; color: var(--grey);
  margin: var(--s3) 0 0;
}

/* ─── croquis au fusain ──────────────────────────────── */
.sketch { margin: var(--s9) 0 0; }
.sketch-img { position: relative; }
.sketch-img img { width: 100%; }

/* révélation : le dessin apparaît de gauche à droite, comme tracé */
.sketch-img picture {
  display: block;
  clip-path: inset(0 100% 0 0);
  transition: clip-path 1.8s var(--out);
}
.sketch.is-in .sketch-img picture { clip-path: inset(0 0 0 0); }

/* repères ①②③④ : filet pointillé + numéro cerclé, volés au croquis */
.marks { position: absolute; inset: auto 0 0 0; height: 0; }
.mark {
  position: absolute; left: var(--x); bottom: 0;
  transform: translate(-50%, 50%);
  display: grid; place-items: center;
  width: 30px; height: 30px;
  border: 1px solid var(--ink); border-radius: 50%;
  background: var(--paper);
  font-size: 12px; font-style: normal;
  opacity: 0; scale: .85;
  transition: opacity .6s var(--ease), scale .6s var(--out), background .35s var(--ease), color .35s var(--ease);
  transition-delay: calc(var(--k, 0) * 140ms + 900ms);
}
.mark i { font-style: normal; }
/* pas de tige pointillée ici : le croquis porte déjà ses propres lignes de repère,
   les pastilles viennent simplement s'y poser. */
.sketch.is-in .mark { opacity: 1; scale: 1; }
.mark.is-hot { background: var(--ink); color: var(--paper); }

.sketch figcaption {
  max-width: var(--wrap); margin: var(--s5) auto 0;
  padding-inline: var(--s3);
}
@media (min-width: 900px) { .sketch figcaption { padding-inline: var(--s6); } }

/* ─── phases ─────────────────────────────────────────── */
.phases {
  list-style: none; margin: var(--s8) 0 0; padding: 0;
  display: grid; gap: var(--s5);
}
@media (min-width: 700px) { .phases { grid-template-columns: repeat(2, 1fr); gap: var(--s6); } }
@media (min-width: 1000px) { .phases { grid-template-columns: repeat(4, 1fr); } }
.phase { padding-top: var(--s3); border-top: 1px solid var(--rule); cursor: default; }
.phase p { color: var(--grey); font-size: 14px; }
.phase-n {
  display: grid; place-items: center;
  width: 24px; height: 24px; margin-bottom: var(--s3);
  border: 1px solid var(--rule); border-radius: 50%; font-size: 11px;
  transition: background .35s var(--ease), color .35s var(--ease), border-color .35s var(--ease);
}
.phase.is-hot .phase-n { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* ─── galerie ────────────────────────────────────────── */
.gallery {
  margin-top: var(--s8);
  display: grid; gap: var(--s4);
  max-width: var(--wrap); margin-inline: auto; padding-inline: var(--s3);
}
@media (min-width: 900px) {
  .gallery { grid-template-columns: 1fr 1fr; gap: var(--s6); padding-inline: var(--s6); }
  .g-wide { grid-column: 1 / -1; }
}
.g-item { margin: 0; }
.g-item img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.g-wide img { aspect-ratio: 21/9; }

/* ─── bilan ──────────────────────────────────────────── */
.bilan {
  margin-top: var(--s9); padding-top: var(--s5);
  border-top: 1px solid var(--rule);
  display: grid; gap: var(--s5);
}
@media (min-width: 900px) { .bilan { grid-template-columns: 1.15fr 1fr; gap: var(--s10); } }
.bilan-big {
  font-size: clamp(2rem, 5vw, 3.75rem); font-weight: 400;
  line-height: 1.05; letter-spacing: -.05em; margin: 0;
}
.bilan-side { padding-top: var(--s2); }
.bilan-side p { color: var(--ink-2); max-width: 34ch; }

.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th, .tbl td { text-align: left; padding: var(--s2) var(--s2) var(--s2) 0; border-bottom: 1px solid var(--rule-2); }
.tbl thead th {
  font-size: 10px; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--grey);
}
.tbl tbody th { font-weight: 400; }
.tbl td { color: var(--grey); }
.tbl td:last-child { color: var(--ink); text-align: right; }

/* ─── suivi ──────────────────────────────────────────── */
.section-suivi { background: var(--white); }
.shot { margin-top: var(--s8); }
.shot-grid { display: grid; gap: var(--s5); }
@media (min-width: 800px) { .shot-grid { grid-template-columns: 1fr 1fr; gap: var(--s7); } }

.shot-drop {
  position: relative; display: block; cursor: pointer;
  aspect-ratio: 4/3; border: 1px dashed var(--rule); overflow: hidden;
  background: var(--paper);
  transition: border-color .4s var(--ease);
}
@media (min-width: 800px) { .shot-drop { aspect-ratio: 3/4; } }
.shot-drop:hover { border-color: var(--ink); }
.shot-drop input[type=file] { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%; }
.shot-drop-in {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: var(--s2);
  color: var(--grey); text-align: center; padding: var(--s3);
  transition: opacity .4s var(--ease), color .4s var(--ease);
}
.shot-drop:hover .shot-drop-in { color: var(--ink); }
.shot-drop-t { font-size: 14px; }
.shot-drop-s { font-size: 13px; color: var(--grey); }
.shot-preview { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.shot-drop.has-img .shot-drop-in { opacity: 0; }
.shot-file { font-size: 12px; color: var(--grey); margin-top: var(--s2); min-height: 1.2em; }

.shot-fields { display: flex; flex-direction: column; gap: var(--s3); }
.field-l {
  display: block; font-size: 11px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--grey); margin-bottom: var(--s1);
}
.field-o { text-transform: none; letter-spacing: 0; }
.field select, .field textarea, .field input[type=email] {
  width: 100%; padding: var(--s2) 0; font: inherit; font-size: 15px;
  color: var(--ink); background: transparent;
  border: 0; border-bottom: 1px solid var(--rule); border-radius: 0;
  transition: border-color .35s var(--ease);
}
.field select:focus, .field textarea:focus, .field input[type=email]:focus,
.field select:hover, .field textarea:hover, .field input[type=email]:hover {
  border-color: var(--ink); outline: none;
}
.field textarea { resize: vertical; }

.btn {
  position: relative; display: inline-flex; align-items: center; gap: var(--s2);
  min-height: 52px; padding: 0 var(--s5); align-self: flex-start;
  background: var(--ink); color: var(--paper);
  border: 1px solid var(--ink); border-radius: 0;
  font: inherit; font-size: 14px; cursor: pointer; overflow: hidden;
  transition: color .45s var(--ease);
}
.btn::before {
  content: ""; position: absolute; inset: 0; background: var(--paper);
  transform: translateY(101%); transition: transform .55s var(--out);
}
.btn > span { position: relative; }
.btn::after { content: "→"; position: relative; transition: transform .45s var(--out); }
.btn:hover { color: var(--ink); }
.btn:hover::before { transform: translateY(0); }
.btn:hover::after { transform: translateX(5px); }

.shot-status { font-size: 13px; min-height: 1.4em; margin: 0; }
.shot-status.ok { color: var(--ink); }
.shot-status.err { color: #8C2F2F; }
.shot-note { font-size: 13px; color: var(--grey); margin: 0; }

/* ─── pied ───────────────────────────────────────────── */
.foot { background: var(--ink); color: var(--white); padding-block: var(--s9); }
.foot-title {
  font-size: clamp(1.375rem, 3.4vw, 2.75rem); font-weight: 400;
  line-height: 1.2; letter-spacing: -.04em; margin: 0 0 var(--s8); max-width: none;
}
.foot-meta {
  margin: 0; display: grid; gap: var(--s4);
  padding-top: var(--s5); border-top: 1px solid rgba(251,251,250,.18);
}
@media (min-width: 700px) { .foot-meta { grid-template-columns: repeat(4, 1fr); gap: var(--s5); } }
.foot-meta dt {
  font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: rgba(251,251,250,.52); margin-bottom: var(--s2);
}
.foot-meta dd { margin: 0; font-size: 14px; line-height: 1.5; }

/* ─── révélations ────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(16px); }
.reveal.is-in {
  opacity: 1; transform: none;
  transition: opacity .9s var(--out), transform .9s var(--out);
  transition-delay: var(--d, 0ms);
}

@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal.is-in { opacity: 1; transform: none; transition: none; }
  .anim .line > span { transform: none; transition: none; }
  .sketch-img picture { clip-path: none; transition: none; }
  .mark { opacity: 1; scale: 1; transition: none; }
  .spec:hover img { transform: none; }
  .hero-media { inset: 0; }
}