/* MTH Studio — feuille de style du site
   Charte : noirs / gris / blancs, une seule couleur vive (Signal #EFFF00, ≤ 2 % de la surface),
   Inter (500 / 700 / 800) + JetBrains Mono 500, le cadre = les deux crochets du logo. */

@font-face { font-family: "Inter"; src: url("../fonts/Inter-Medium.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Inter"; src: url("../fonts/Inter-Bold.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Inter"; src: url("../fonts/Inter-ExtraBold.woff2") format("woff2"); font-weight: 800; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("../fonts/JetBrainsMono-Medium.woff2") format("woff2"); font-weight: 500; font-display: swap; }

:root {
  --noir: #0A0B0C;
  --noir-2: #111214;
  --graphite: #454545;
  --filet: #26282B;
  --argent: #CCCACC;
  --casse: #D9D6CE;
  --blanc: #FFFFFF;
  --signal: #EFFF00;

  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --gutter: clamp(16px, 4vw, 56px);
  --max: 1320px;
  --ease-in: cubic-bezier(.16, 1, .3, 1);   /* entrée en décélération */
  --ease-out: cubic-bezier(.7, 0, .84, 0);  /* sortie rapide */
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--noir);
  color: var(--casse);
  font: 500 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, video, iframe { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1em; max-width: 64ch; }
h1, h2, h3 { margin: 0; color: var(--blanc); font-weight: 800; line-height: 1.02; }
strong { color: var(--blanc); font-weight: 700; }
::selection { background: var(--signal); color: var(--noir); }
:focus-visible { outline: 1px solid var(--signal); outline-offset: 4px; }

/* Grain à l'ancienne, très léger, sur tout l'écran */
body::after {
  content: ""; position: fixed; inset: -50%; z-index: 100; pointer-events: none; opacity: .07;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 .9 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.skip { position: absolute; left: -9999px; top: 8px; z-index: 200; background: var(--signal); color: var(--noir); padding: 8px 12px; font: 500 12px var(--mono); }
.skip:focus { left: 8px; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }

/* ---------- Micro-typo ---------- */
.mono, .eyebrow, .label {
  font-family: var(--mono); font-weight: 500; text-transform: uppercase;
  letter-spacing: .19em; font-size: 12px; line-height: 1.6;
}
.eyebrow { color: var(--signal); display: block; }
.label { color: var(--argent); }
.dim { color: #8D8B86; }
.sig { color: var(--signal); }

/* ---------- Le cadre (crochets du logo) ---------- */
.frame { position: relative; --arm: 44px; --t: calc(var(--arm) * .206); --c: var(--blanc); }
.frame > .br { position: absolute; width: var(--arm); height: var(--arm); pointer-events: none; }
.frame > .br.tl { top: 0; left: 0; border-top: var(--t) solid var(--c); border-left: var(--t) solid var(--c); }
.frame > .br.bd { right: 0; bottom: 0; border-bottom: var(--t) solid var(--c); border-right: var(--t) solid var(--c); }
.frame.signal { --c: var(--signal); }

/* ---------- En-tête ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  transition: background .3s, border-color .3s; border-bottom: 1px solid transparent;
}
/* Le flou est porté par un pseudo-élément : sur l'en-tête lui-même, il emprisonnerait le menu mobile (position: fixed) */
.site-header::before { content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0; background: rgba(10, 11, 12, .92); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); transition: opacity .3s; }
.site-header.solid { border-bottom-color: var(--filet); }
.site-header.solid::before { opacity: 1; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.logo img { width: 168px; height: auto; }
.nav { display: flex; gap: 34px; }
.nav a { position: relative; font: 500 12px/1 var(--mono); letter-spacing: .19em; text-transform: uppercase; color: var(--casse); padding: 8px 0; transition: color .2s; }
.nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px; background: var(--signal); transition: right .25s var(--ease-in); }
.nav a:hover { color: var(--blanc); }
.nav a:hover::after, .nav a[aria-current="page"]::after { right: 0; }
.nav a[aria-current="page"] { color: var(--blanc); }
.menu-btn { display: none; background: none; border: 0; color: var(--blanc); font: 500 12px/1 var(--mono); letter-spacing: .19em; padding: 12px 0 12px 12px; cursor: pointer; }

@media (max-width: 900px) {
  .menu-btn { display: block; }
  .logo img { width: 160px; }
  .nav {
    position: fixed; inset: 76px 0 0 0; flex-direction: column; gap: 0; padding: 24px var(--gutter);
    background: var(--noir); border-top: 1px solid var(--filet);
    opacity: 0; visibility: hidden; transition: opacity .2s, visibility .2s;
  }
  .nav a { font: 800 30px/1 var(--sans); letter-spacing: .04em; padding: 20px 0; border-bottom: 1px solid var(--filet); }
  .nav a::after { display: none; }
  .nav a[aria-current="page"] { color: var(--signal); }
  .menu-open .nav { opacity: 1; visibility: visible; }
  .menu-open { overflow: hidden; }
  .menu-open .site-header { background: var(--noir); transform: none; }
}

/* ---------- Boutons ---------- */
.btns { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 40px; }
.btn {
  display: inline-flex; align-items: center; gap: 12px; padding: 17px 24px;
  font: 500 12px/1 var(--mono); letter-spacing: .19em; text-transform: uppercase;
  border: 1px solid var(--graphite); color: var(--blanc); transition: border-color .2s, background .2s, color .2s;
}
.btn:hover { border-color: var(--blanc); }
.btn.primary { background: var(--blanc); color: var(--noir); border-color: var(--blanc); }
.btn.primary:hover { background: var(--signal); border-color: var(--signal); }
.btn .arr { transition: transform .25s var(--ease-in); }
.btn:hover .arr { transform: translateX(4px); }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100vh; min-height: 100svh; display: flex; flex-direction: column; justify-content: center; padding: 120px 0 110px; }
.hero.short { min-height: auto; padding: 170px 0 70px; }
.marks span { position: absolute; width: 14px; height: 14px; }
.marks span::before, .marks span::after { content: ""; position: absolute; background: var(--graphite); }
.marks span::before { left: 6px; top: 0; width: 1px; height: 14px; }
.marks span::after { top: 6px; left: 0; height: 1px; width: 14px; }
.marks .m1 { top: 96px; left: var(--gutter); } .marks .m2 { top: 96px; right: var(--gutter); }
.marks .m3 { bottom: 64px; left: var(--gutter); } .marks .m4 { bottom: 64px; right: var(--gutter); }

.hero h1 .eyebrow { margin-bottom: 28px; }
.title-frame { display: inline-block; padding: clamp(22px, 3.4vw, 46px) clamp(26px, 4vw, 60px); --arm: clamp(30px, 4.2vw, 60px); }
.display {
  display: block; font-weight: 800; text-transform: uppercase; color: var(--blanc);
  font-size: clamp(40px, 8.6vw, 136px); letter-spacing: .06em; line-height: .98;
}
.hero .lead { margin-top: 36px; font-size: clamp(17px, 1.5vw, 20px); color: var(--casse); max-width: 52ch; }

.hero-bar {
  position: absolute; left: 0; right: 0; bottom: 0; border-top: 1px solid var(--filet);
}
.hero-bar .wrap { display: flex; justify-content: space-between; gap: 24px; padding-top: 18px; padding-bottom: 18px; color: #8D8B86; }
.hero-bar .rec::before { content: "●"; color: var(--signal); margin-right: 8px; }
@media (max-width: 700px) { .hero-bar .hide-s { display: none; } .hero-bar .wrap { font-size: 11px; letter-spacing: .12em; white-space: nowrap; } }

/* Ouverture du cadre : du centre vers les coins (~8 images), entrée en décélération */
@media (prefers-reduced-motion: no-preference) {
  .js .title-frame > .br.tl { animation: open-tl .34s var(--ease-in) .15s both; }
  .js .title-frame > .br.bd { animation: open-bd .34s var(--ease-in) .15s both; }
  .js .title-frame.done > .br { animation: none; }
  @keyframes open-tl { from { top: 46%; left: 46%; } }
  @keyframes open-bd { from { bottom: 46%; right: 46%; } }
  /* Apparitions : entrée en décélération (par le bas en descendant, par le haut en remontant), en cascade */
  .js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .25s var(--ease-out), transform .25s var(--ease-out); }
  .js .reveal.above { transform: translateY(-22px); }
  .js .reveal.in { opacity: 1; transform: none; transition: opacity .8s var(--ease-in) var(--d, 0ms), transform .9s var(--ease-in) var(--d, 0ms); }

  /* Vignettes : légère mise au point (zoom arrière) à l'entrée */
  .js .work.reveal .player img { transform: scale(1.07); transition: transform 1.4s var(--ease-in) var(--d, 0ms), filter .4s; }
  .js .work.reveal.in .player img { transform: none; }
  .js .work.reveal.in .player:hover img { transform: scale(1.03); }

  /* Filets de section qui se tracent de gauche à droite */
  .js .sec { border-top-color: transparent; }
  .js .sec::before { content: ""; position: absolute; top: -1px; left: 0; right: 0; height: 1px; background: var(--filet); transform: scaleX(0); transform-origin: left; transition: transform 1.2s var(--ease-in); }
  .js .sec.line-in::before { transform: none; }

  /* Jauge : les 20 barres s'allument une à une */
  .js .gauge i { background: var(--filet); transition: background .08s linear calc(var(--k) * 40ms + 250ms); }
  .js .in .gauge i { background: var(--blanc); }

  /* En-tête : se retire en descendant (sortie rapide), revient en remontant (entrée en décélération) */
  .site-header { transition: background .3s, border-color .3s, transform .45s var(--ease-in); }
  .site-header.away { transform: translateY(-100%); transition: background .3s, border-color .3s, transform .22s var(--ease-out); }
}

/* ---------- Sections ---------- */
section { position: relative; }
.sec { padding: clamp(80px, 11vw, 150px) 0; border-top: 1px solid var(--filet); }
.sec-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 20px; margin-bottom: clamp(36px, 5vw, 64px); }
.sec-head .count { color: #8D8B86; }
h2.h { font-size: clamp(30px, 4.4vw, 60px); text-transform: uppercase; letter-spacing: .05em; max-width: 18ch; }
h3.h { font-size: 20px; font-weight: 700; text-transform: uppercase; letter-spacing: .12em; line-height: 1.3; }
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 96px); align-items: start; }
.cols .big { font-size: clamp(20px, 2vw, 26px); line-height: 1.45; color: var(--blanc); }
@media (max-width: 860px) { .cols { grid-template-columns: 1fr; } }

/* Services */
.services { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--graphite); }
.service { position: relative; padding: 28px 28px 34px 0; }
.service + .service { padding-left: 28px; border-left: 1px solid var(--filet); }
.service::before { content: ""; position: absolute; top: -1px; left: 0; width: 0; height: 1px; background: var(--signal); transition: width .5s var(--ease-in); }
.service:hover::before { width: 100%; }
.service .num { display: block; margin-bottom: 44px; color: #8D8B86; }
.service h3 { margin-bottom: 14px; }
.service p { font-size: 16px; }
.service a.more { display: inline-block; margin-top: 8px; border-bottom: 1px solid var(--graphite); padding-bottom: 4px; }
.service a.more:hover { border-color: var(--blanc); color: var(--blanc); }
@media (max-width: 1080px) {
  .services { grid-template-columns: 1fr 1fr; }
  .service:nth-child(3) { padding-left: 0; border-left: 0; }
  .service:nth-child(n+3) { border-top: 1px solid var(--filet); }
}
@media (max-width: 620px) {
  .services { grid-template-columns: 1fr; }
  .service, .service + .service { padding-left: 0; border-left: 0; }
  .service + .service { border-top: 1px solid var(--filet); }
  .service .num { margin-bottom: 20px; }
}

/* Donnée clé */
.data { display: grid; grid-template-columns: auto 1fr; gap: clamp(32px, 6vw, 96px); align-items: center; }
.data .frame { --arm: 52px; padding: 46px 56px 50px; }
.data .num { font-variant-numeric: tabular-nums; display: block; font: 800 clamp(72px, 11vw, 160px)/.9 var(--sans); color: var(--blanc); letter-spacing: .02em; white-space: nowrap; }
.data .unit { font: 800 .32em/1 var(--sans); color: var(--signal); letter-spacing: .1em; margin-left: .2em; }
.gauge { display: flex; gap: 5px; margin-top: 26px; }
.gauge i { flex: 1; height: 14px; background: var(--blanc); }
.gauge i.off { background: var(--filet); }
@media (max-width: 860px) { .data { grid-template-columns: 1fr; } .data .frame { padding: 34px 30px 38px; } }

/* Réalisations */
.works { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(36px, 4vw, 56px) clamp(20px, 3vw, 40px); }
.works.three { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 1000px) { .works.three { grid-template-columns: 1fr 1fr; } }
@media (max-width: 680px) { .works, .works.three { grid-template-columns: 1fr; } }
.work .player { position: relative; aspect-ratio: 16 / 9; background: var(--noir-2); overflow: hidden; cursor: pointer; border: 0; padding: 0; width: 100%; display: block; }
.work .player img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.85) contrast(1.05); transition: transform .8s var(--ease-in), filter .4s; }
.work .player::after { content: ""; position: absolute; inset: 0; background: rgba(10, 11, 12, .28); transition: background .3s; }
.work .player:hover img { transform: scale(1.03); filter: none; }
.work .player:hover::after { background: rgba(10, 11, 12, .05); }
.work .play {
  position: absolute; z-index: 2; left: 18px; bottom: 16px; color: var(--blanc);
  display: flex; align-items: center; gap: 10px;
}
.work .play::before { content: ""; width: 0; height: 0; border-left: 10px solid var(--signal); border-top: 6px solid transparent; border-bottom: 6px solid transparent; }
.work .player .frame { position: absolute; inset: 14px; z-index: 2; --arm: 22px; opacity: 0; transition: opacity .25s, inset .35s var(--ease-in); }
.work .player:hover .frame, .work .player:focus-visible .frame { opacity: 1; inset: 10px; }
.work .player iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; z-index: 3; }
.work .meta { display: flex; justify-content: space-between; gap: 16px; margin-top: 18px; }
.work h3, .work h2 { margin-top: 8px; font-size: clamp(17px, 1.6vw, 21px); font-weight: 700; text-transform: uppercase; letter-spacing: .1em; line-height: 1.3; }
.work p { margin-top: 10px; font-size: 15px; color: #A9A6A0; }

/* Clients */
.clients { display: flex; flex-wrap: wrap; gap: 14px 0; font: 500 clamp(13px, 1.3vw, 16px)/1.5 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--blanc); }
.clients li { list-style: none; white-space: nowrap; }
.nowrap { white-space: nowrap; }
.clients li:not(:last-child)::after { content: "◆"; color: var(--graphite); margin: 0 18px; font-size: .7em; vertical-align: .15em; }
ul.clients { padding: 0; margin: 0; }

/* Liste à puces sobre */
.list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--filet); }
.list li { display: flex; gap: 22px; padding: 18px 0; border-bottom: 1px solid var(--filet); color: var(--blanc); }
.list li .label { flex: 0 0 auto; padding-top: 3px; color: #8D8B86; }

/* Frise (à propos) */
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline li { display: grid; grid-template-columns: 140px 1fr; gap: 24px; padding: 28px 0; border-top: 1px solid var(--filet); }
.timeline .year { font: 800 34px/1 var(--sans); color: var(--blanc); letter-spacing: .04em; }
.timeline li:last-child .year { color: var(--signal); }
.timeline p { margin: 0; }
@media (max-width: 600px) { .timeline li { grid-template-columns: 1fr; gap: 10px; } }

.team { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.member { padding: 30px 0 0; border-top: 1px solid var(--graphite); }
.member .name { font: 800 clamp(22px, 2.4vw, 32px)/1.1 var(--sans); color: var(--blanc); text-transform: uppercase; letter-spacing: .08em; }
.member .role { margin-top: 10px; }
@media (max-width: 600px) { .team { grid-template-columns: 1fr; } }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 5fr 7fr; gap: clamp(40px, 7vw, 110px); }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } }
.coords a.big-link { display: block; font: 800 clamp(24px, 3vw, 38px)/1.2 var(--sans); color: var(--blanc); letter-spacing: .02em; margin: 6px 0 28px; word-break: break-word; transition: color .2s; }
.coords a.big-link:hover { color: var(--signal); }
form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 600px) { form .row { grid-template-columns: 1fr; } }
.field { display: block; margin-bottom: 22px; }
.field span { display: block; margin-bottom: 10px; }
.field input, .field textarea, .field select {
  width: 100%; background: transparent; border: 0; border-bottom: 1px solid var(--graphite); color: var(--blanc);
  font: 500 18px/1.5 var(--sans); padding: 10px 0; border-radius: 0; transition: border-color .2s;
}
.field textarea { min-height: 150px; resize: vertical; }
.field select option { background: var(--noir); }
.field input:focus, .field textarea:focus, .field select:focus { outline: 0; border-color: var(--signal); }
.form-note { margin-top: 16px; font-size: 14px; color: #8D8B86; }
button.btn { cursor: pointer; }

/* Texte long (mentions) */
.prose h2 { font-size: 22px; text-transform: uppercase; letter-spacing: .1em; margin: 56px 0 18px; }
.prose p, .prose li { color: var(--casse); max-width: 72ch; }
.prose a { border-bottom: 1px solid var(--graphite); }
.prose a:hover { border-color: var(--blanc); color: var(--blanc); }
.todo { color: var(--noir); background: var(--signal); padding: 0 6px; font: 500 .85em var(--mono); }

/* Appel final */
.cta { padding: clamp(100px, 14vw, 190px) 0; border-top: 1px solid var(--filet); text-align: left; }
.cta .display { font-size: clamp(36px, 7vw, 108px); }

/* ---------- Pied de page ---------- */
.site-footer { border-top: 1px solid var(--filet); padding: 72px 0 28px; }
.foot { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.foot .logo img { width: 180px; }
.foot h2 { font: 500 12px/1.6 var(--mono); letter-spacing: .19em; text-transform: uppercase; color: #8D8B86; margin-bottom: 18px; }
.foot ul { list-style: none; padding: 0; margin: 0; }
.foot li { margin-bottom: 10px; font-size: 15px; }
.foot a:hover { color: var(--blanc); }
.foot .sign { margin-top: 28px; font: 800 13px/1.4 var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--blanc); }
.edge { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin-top: 72px; padding-top: 22px; border-top: 1px solid var(--filet); color: #6F6D69; }
.edge a:hover { color: var(--blanc); }
@media (max-width: 900px) { .foot { grid-template-columns: 1fr 1fr; } .foot > :first-child { grid-column: 1 / -1; } }

/* Barre de progression de lecture (1 px Signal sous l'en-tête) */
.progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 1px; background: var(--signal); transform: scaleX(0); transform-origin: left; pointer-events: none; }