/* Idée Studio */
:root {
  --ink: #0a0a0a;
  --accent: #ff4a1c;
  --text: #3d3d3a;
  --mute: #8b8b86;
  --line: #e8e8e5;
  --soft: #f6f6f4;
  --wrap: 1280px;
  --gut: clamp(20px, 4vw, 48px);
  --sans: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: #fff; color: var(--ink); font: 400 17px/1.55 var(--sans); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
ul, ol { margin: 0; padding: 0; list-style: none; }
figure, h1, h2, h3, p { margin: 0; }
.wrap { width: min(var(--wrap), 100% - 2 * var(--gut)); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: #fff; padding: 8px 14px; border-radius: 6px; z-index: 60; }
.skip:focus { left: 12px; }
.k { font: 500 13px/1 var(--mono); color: var(--mute); }

/* En-tête */
.top { position: sticky; top: 0; z-index: 40; display: flex; justify-content: space-between; align-items: center; height: 68px; padding: 0 var(--gut); background: rgba(255,255,255,.92); backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid transparent; transition: border-color .25s; }
.top.scrolled { border-bottom-color: var(--line); }
.brand { font-weight: 700; font-size: 18px; letter-spacing: -.03em; }
.top nav { display: flex; align-items: center; gap: 28px; font-size: 15px; color: var(--text); }
.top nav a:hover { color: var(--ink); }
.lang { font: 500 13px/1 var(--mono); border: 1px solid var(--line); border-radius: 6px; padding: 6px 9px; }

/* Héros */
.hero { padding: clamp(72px, 11vw, 150px) 0 clamp(72px, 9vw, 120px); }
.hero h1 { font-weight: 600; font-size: clamp(42px, 6.6vw, 96px); line-height: 1; letter-spacing: -.045em; max-width: 14ch; margin-top: 22px; }
.lead { font-size: clamp(18px, 1.6vw, 21px); color: var(--text); max-width: 56ch; margin-top: 28px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 40px; }
.btn { display: inline-flex; align-items: center; height: 50px; padding: 0 24px; border-radius: 999px; background: var(--ink); color: #fff; font-weight: 500; font-size: 16px; transition: background .2s, transform .2s; }
.btn:hover { background: #2b2b2a; }
.btn.ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 1px #d6d6d2; }
.btn.ghost:hover { box-shadow: inset 0 0 0 1px var(--ink); }

/* Têtes de section */
section { scroll-margin-top: 80px; }
.head { display: grid; grid-template-columns: 220px 1fr; gap: 24px; align-items: baseline; padding-top: 28px; border-top: 1px solid var(--ink); margin-bottom: clamp(36px, 5vw, 64px); }
.head h2 { font-weight: 600; font-size: clamp(30px, 3.8vw, 52px); line-height: 1.05; letter-spacing: -.04em; max-width: 20ch; }

/* Services */
.services { padding-bottom: clamp(80px, 10vw, 140px); }
.svc-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line); }
.svc { padding: 28px 28px 32px 0; border-right: 1px solid var(--line); }
.svc + .svc { padding-left: 28px; }
.svc:last-child { border-right: 0; }
.svc-n { font: 500 13px/1 var(--mono); color: var(--mute); }
.svc h3 { font-weight: 600; font-size: 22px; letter-spacing: -.02em; margin: 40px 0 12px; }
.svc p { color: var(--text); font-size: 16px; }
.svc ul { margin-top: 20px; }
.svc li { font-size: 14px; color: var(--mute); padding: 7px 0; border-top: 1px solid var(--line); }

/* Projets */
.work { padding-bottom: clamp(80px, 10vw, 140px); }
.cases { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 5vw, 72px) clamp(20px, 2.4vw, 32px); }
.case.wide { grid-column: 1 / -1; }
.case-link { display: block; }
.tile { --tile: var(--soft); background: var(--tile); border-radius: 10px; overflow: hidden; aspect-ratio: 4 / 3; display: grid; place-items: center; padding: clamp(24px, 4vw, 56px); position: relative; }
.case.wide .tile { aspect-ratio: 16 / 8; }
.comp { width: 100%; height: 100%; position: relative; display: grid; place-items: center; transition: transform .6s cubic-bezier(.2,.8,.2,1); }
a.case-link:hover .comp { transform: scale(1.025); }
.browser { width: 100%; border-radius: 8px; overflow: hidden; background: #fff; box-shadow: 0 24px 50px -24px rgba(0,0,0,.28), 0 0 0 1px rgba(0,0,0,.06); }
.dark .browser { background: #111; box-shadow: 0 24px 60px -20px rgba(0,0,0,.7), 0 0 0 1px rgba(255,255,255,.08); }
.bar { display: block; height: 22px; background: #f3f3f1; border-bottom: 1px solid rgba(0,0,0,.05); }
.dark .bar { background: #1a1a18; border-bottom-color: rgba(255,255,255,.05); }
.phone { border-radius: 30px; padding: 6px; background: #0a0a0a; box-shadow: 0 24px 50px -22px rgba(0,0,0,.4); }
.dark .phone { box-shadow: 0 24px 60px -20px rgba(0,0,0,.8), 0 0 0 1px rgba(255,255,255,.1); }
.phone img { border-radius: 24px; aspect-ratio: 390 / 800; object-fit: cover; object-position: top; width: 100%; }
.duo { display: block; }
.duo .browser { width: 84%; position: absolute; left: 0; top: 50%; transform: translateY(-50%); }
.duo .phone.over { position: absolute; right: 2%; bottom: 0; width: 23%; }
.case:not(.wide) .duo .phone.over { width: 30%; }
.single .phone { width: 35%; }
.cap { padding-top: 20px; }
.cap-top { display: flex; align-items: baseline; gap: 12px; }
.cap h3 { font-weight: 600; font-size: 22px; letter-spacing: -.02em; }
.etat { font: 500 12px/1 var(--mono); color: var(--mute); border: 1px solid var(--line); border-radius: 4px; padding: 4px 6px; }
.yr { margin-left: auto; font: 400 13px/1 var(--mono); color: var(--mute); }
.type { font-size: 15px; color: var(--mute); margin-top: 4px; }
.desc { color: var(--text); font-size: 16px; margin-top: 12px; max-width: 60ch; }
.voir { display: inline-block; margin-top: 14px; font-size: 15px; font-weight: 500; border-bottom: 1px solid currentColor; }

/* Méthode */
.method { padding-bottom: clamp(80px, 10vw, 140px); }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(20px, 3vw, 40px); }
.steps span { font: 500 13px/1 var(--mono); color: var(--mute); }
.steps h3 { font-weight: 600; font-size: 20px; letter-spacing: -.02em; margin: 16px 0 10px; }
.steps p { color: var(--text); font-size: 16px; }

/* Studio */
.studio { padding: 28px 0 clamp(80px, 10vw, 140px); border-top: 1px solid var(--ink); }
.studio-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 80px); margin-top: 28px; }
.studio h2 { font-weight: 600; font-size: clamp(30px, 3.8vw, 52px); line-height: 1.05; letter-spacing: -.04em; }
.studio-grid p { color: var(--text); font-size: 18px; }
.studio-grid p + p { margin-top: 18px; }

/* Contact */
.contact { background: var(--soft); border-radius: 14px; padding: clamp(48px, 8vw, 110px) clamp(24px, 6vw, 90px); margin-bottom: clamp(60px, 8vw, 100px); }
.contact h2 { font-weight: 600; font-size: clamp(38px, 6vw, 84px); line-height: 1; letter-spacing: -.045em; }
.contact p { color: var(--text); font-size: 18px; max-width: 52ch; margin: 22px 0 34px; }
.contact .mail { display: inline-block; margin-left: 20px; color: var(--text); border-bottom: 1px solid #c9c9c4; }

.foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 28px 0 40px; border-top: 1px solid var(--line); font-size: 14px; color: var(--mute); }
.foot a:hover { color: var(--ink); }

/* Apparition */
.rv { opacity: 0; transform: translateY(16px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.8,.2,1); }
.rv.in { opacity: 1; transform: none; }

@media (max-width: 1000px) {
  .svc-list { grid-template-columns: 1fr 1fr; }
  .svc:nth-child(2) { border-right: 0; }
  .svc:nth-child(3) { padding-left: 0; }
  .svc:nth-child(n+3) { border-top: 1px solid var(--line); }
  .steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .hide-sm { display: none; }
  .hero { padding: 56px 0 64px; }
  .head { grid-template-columns: 1fr; gap: 12px; }
  .svc-list { grid-template-columns: 1fr; }
  .svc, .svc + .svc { padding: 22px 0; border-right: 0; border-top: 1px solid var(--line); }
  .svc h3 { margin: 10px 0 8px; font-size: 20px; }
  .svc ul { display: none; }
  .cases { grid-template-columns: 1fr; gap: 48px; }
  .tile, .case.wide .tile { aspect-ratio: 1 / 1; padding: 22px; }
  .duo .browser { width: 100%; top: 34%; }
  .case .duo .phone.over, .case:not(.wide) .duo .phone.over { width: 34%; right: 0; bottom: 0; border-radius: 20px; padding: 4px; }
  .duo .phone.over img { border-radius: 16px; }
  .single .phone { width: 46%; border-radius: 24px; padding: 5px; }
  .single .phone img { border-radius: 19px; }
  .steps, .studio-grid { grid-template-columns: 1fr; }
  .contact .mail { display: block; margin: 18px 0 0; width: max-content; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
  .rv { opacity: 1; transform: none; }
}

/* Couleur de la marque, utilisée avec parcimonie */
.brand .acc { color: var(--accent); }
.hero .k { color: var(--accent); }
.btn:not(.ghost) { background: var(--accent); }
.btn:not(.ghost):hover { background: var(--ink); }
.voir { border-bottom-color: var(--accent); }
a.case-link:hover h3 { color: var(--accent); }
.mail:hover { color: var(--accent); }