/* ============ Base ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #000;
    --surface: #111113;
    --surface-2: #1c1c1e;
    --text: #f5f5f7;
    --muted: #86868b;
    --line: rgba(255, 255, 255, .12);
    --blue: #2997ff;
    --violet: #bf5af2;
    --grad: linear-gradient(135deg, var(--blue), var(--violet));
    --size: min(46vmin, 440px);
    --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html { scroll-behavior: smooth; scroll-padding-top: 56px; }
body { background: var(--bg); color: var(--text); font-family: var(--font); line-height: 1.5; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }
.muted { color: var(--muted); }
.small { font-size: .9rem; }

/* ============ Navigation ============ */
.nav { position: fixed; inset: 0 0 auto 0; z-index: 50; height: 52px; padding: 0 clamp(1rem, 4vw, 2.5rem); display: flex; align-items: center; justify-content: space-between; background: rgba(0, 0, 0, .65); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); border-bottom: 1px solid var(--line); }
.nav-brand { font-weight: 700; letter-spacing: .08em; }
.nav nav { display: flex; gap: clamp(.8rem, 2.5vw, 1.8rem); align-items: center; font-size: .85rem; color: #d2d2d7; }
.nav nav a:hover { color: #fff; }
@media (max-width: 620px) { .nav nav { gap: .7rem; font-size: .75rem; } }

/* ============ Story (scroll façon Apple) ============ */
/* Version de base (sans JS / mouvement réduit) : simple pile verticale. */
.stage { min-height: 100vh; padding: 7rem 1.5rem 4rem; display: flex; flex-direction: column; align-items: center; gap: 2rem; text-align: center; }
.intro-top h1 { font-size: clamp(2.2rem, 6vw, 4.5rem); line-height: 1.05; letter-spacing: -.02em; background: linear-gradient(180deg, #fff, #a1a1a6); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.eyebrow { color: var(--blue); font-weight: 600; letter-spacing: .12em; text-transform: uppercase; font-size: .8rem; margin-bottom: .6rem; }
.lead { font-size: clamp(1.1rem, 2.2vw, 1.6rem); color: #d2d2d7; }
.pill { display: inline-block; margin-top: 1rem; padding: .55rem 1.1rem; border: 1px solid var(--line); border-radius: 999px; background: rgba(255, 255, 255, .06); font-size: .95rem; }
.hint { display: none; margin-top: 1.2rem; color: var(--muted); font-size: .85rem; }

.photo-wrap { position: relative; width: var(--size); aspect-ratio: 1; }
.photo { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; box-shadow: 0 30px 80px rgba(41, 151, 255, .25); }
.ring { position: absolute; inset: -14px; border-radius: 50%; background: conic-gradient(var(--blue), var(--violet), var(--blue)); opacity: .25;
    -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 3px), #000 calc(100% - 2px)); mask: radial-gradient(farthest-side, transparent calc(100% - 3px), #000 calc(100% - 2px)); }

.steps { display: grid; gap: 1.2rem; width: min(100%, 640px); text-align: left; }
.step { padding: 1.4rem 1.6rem; border: 1px solid var(--line); border-radius: 22px; background: var(--surface); }
.step-type { font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--blue); font-weight: 600; }
.step-period { font-size: clamp(1.6rem, 3.4vw, 2.6rem); font-weight: 700; letter-spacing: -.02em; line-height: 1.1; margin: .3rem 0 .6rem; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.step h2 { font-size: 1.25rem; line-height: 1.25; }
.step-org { color: var(--muted); margin-top: .2rem; }
.step-desc { color: #c7c7cc; margin-top: .6rem; }
.step-links { display: flex; flex-wrap: wrap; gap: .4rem 1.2rem; margin-top: .8rem; }
.step-links a { color: var(--blue); font-weight: 500; }
.step-links a:hover { text-decoration: underline; }
.rail { display: none; }

/* Images du parcours : vignette en mode simple, grande image floue en fond en mode animé */
.media { display: none; }
.step-thumb { display: block; width: auto; max-width: 220px; max-height: 130px; margin-bottom: .9rem; padding: .6rem; border-radius: 14px; background: #fff; object-fit: contain; }
.step-thumb[data-tone="dark"] { background: #0c0c0e; border: 1px solid var(--line); }
.step-thumb[data-tone="bleed"] { padding: 0; }

/* Version animée : activée par app.js (classe .is-animated). */
.story.is-animated { height: calc(100vh * (var(--steps) * .85 + 1.3)); }
.is-animated .stage { position: sticky; top: 0; height: 100vh; height: 100svh; min-height: 0; padding: 0; display: block; overflow: hidden; }
.is-animated .intro { position: absolute; left: 0; right: 0; text-align: center; padding: 0 1.5rem; opacity: var(--intro-o, 1); transform: translateY(calc((1 - var(--intro-o, 1)) * -24px)); will-change: opacity, transform; pointer-events: none; }
.is-animated .intro-top { top: clamp(4.2rem, 13vh, 8rem); }
.is-animated .intro-bottom { bottom: clamp(1.5rem, 7vh, 4rem); transform: translateY(calc((1 - var(--intro-o, 1)) * 24px)); }
.is-animated .hint { display: block; }
.is-animated .photo-wrap { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%) translateY(var(--py, 0px)) scale(var(--ps, 1)); will-change: transform; }
.is-animated .ring { opacity: .9; background: conic-gradient(var(--blue) calc(var(--p, 0) * 360deg), rgba(255, 255, 255, .12) 0); }

.is-animated .steps { display: block; position: absolute; inset: 0; width: auto; pointer-events: none; }
.is-animated .step { position: absolute; top: 50%; width: min(32vw, 400px); padding: 0; border: 0; background: none; opacity: var(--o, 0); transform: translateY(calc(-50% + (1 - var(--o, 0)) * 36px)); will-change: opacity, transform; }
.is-animated .step.right { left: calc(50% + var(--size) * .31 + 3rem); text-align: left; }
.is-animated .step { pointer-events: auto; }
.is-animated .step.left .step-links { justify-content: flex-end; }
.is-animated .step.left  { right: calc(50% + var(--size) * .31 + 3rem); text-align: right; }
.is-animated .step-period { font-size: clamp(2rem, 4.4vw, 3.8rem); }
.is-animated .step h2 { font-size: clamp(1.1rem, 1.8vw, 1.5rem); }

.is-animated .step-thumb { display: none; }
.is-animated .media { display: block; position: absolute; inset: 0; pointer-events: none; }
.media-item { position: absolute; left: 50%; top: 50%; width: min(84vw, 1000px); height: min(76vh, 720px); height: min(76svh, 720px); pointer-events: none; visibility: hidden;
    opacity: calc(var(--o, 0) * var(--max, .3));
    filter: blur(calc(5px + (1 - var(--o, 0)) * 36px));
    transform: translate(calc(-50% + var(--dx, 0px) + (.5 - var(--l, .5)) * 7vw), calc(-50% + (.5 - var(--l, .5)) * 150px)) scale(calc(1.02 + var(--l, .5) * .2)) rotate(calc((var(--l, .5) - .5) * 4deg));
    -webkit-mask-image: radial-gradient(closest-side, #000 35%, transparent 100%); mask-image: radial-gradient(closest-side, #000 35%, transparent 100%);
    will-change: transform, opacity, filter; }
.media-item img { display: block; width: 100%; height: 100%; object-fit: contain; }
.media-item[data-tone="light"] { --max: .24; }
.media-item[data-tone="dark"] { --max: .34; }
.media-item[data-tone="bleed"] { --max: .34; }
.media-item[data-tone="bleed"] img { object-fit: cover; }
.media-item.on-right { --dx: 14vw; }
.media-item.on-left { --dx: -14vw; }

.is-animated .rail { display: flex; flex-direction: column; gap: 10px; position: absolute; right: clamp(.8rem, 2.5vw, 2rem); top: 50%; transform: translateY(-50%); }
.rail i { width: 6px; height: 6px; border-radius: 50%; background: rgba(255, 255, 255, .25); transition: background .3s, transform .3s; }
.rail i.on { background: var(--blue); transform: scale(1.6); }

@media (max-width: 760px) {
    :root { --size: min(64vw, 300px, 34vh); --size: min(64vw, 300px, 34svh); }
    .is-animated .step { left: 1.25rem; right: 1.25rem; top: auto; bottom: clamp(1.5rem, 6vh, 3rem); width: auto; text-align: left !important; transform: translateY(calc((1 - var(--o, 0)) * 36px)); }
    .is-animated .step.right, .is-animated .step.left { left: 1.25rem; right: 1.25rem; }
    .is-animated .step-period { font-size: 2rem; }
    .is-animated .step.left .step-links { justify-content: flex-start; }
    .is-animated .rail { display: none; }
    .media-item.on-left, .media-item.on-right { --dx: 0px; width: 100vw; height: 58svh; top: 36%; }
    .is-animated .step { padding-top: .8rem; background: linear-gradient(to top, #000 78%, rgba(0, 0, 0, 0)); }
    .is-animated .step-desc { font-size: clamp(.78rem, 1.75svh, .92rem); line-height: 1.4; margin-top: .4rem; }
    .is-animated .step h2 { font-size: 1.05rem; }
    .is-animated .step-period { font-size: 1.8rem; margin: .15rem 0 .3rem; }
    .nav nav a { padding: .6rem .15rem; }
    .block { padding-block: 4rem; }
    .actions .btn { width: 100%; max-width: 340px; text-align: center; }
    .btn-primary { overflow-wrap: anywhere; }
}

@media (max-width: 760px) and (max-height: 620px) {
    :root { --size: min(60vw, 26svh); }
    .intro-top h1 { font-size: 1.7rem; }
    .eyebrow { margin-bottom: .2rem; }
    .lead { font-size: 1rem; }
    .pill { font-size: .8rem; padding: .4rem .8rem; margin-top: .6rem; }
    .is-animated .hint { display: none; }
    .is-animated .intro-top { top: 3.8rem; }
    .is-animated .intro-bottom { bottom: 1rem; }
}

@media (max-width: 760px) and (min-height: 621px) and (max-height: 720px) {
    :root { --size: min(58vw, 27svh); }
}

@media (max-width: 360px) {
    .nav { padding: 0 .75rem; }
    .nav nav { gap: .45rem; font-size: .7rem; }
}

/* ============ Sections ============ */
.block { max-width: 1100px; margin: 0 auto; padding: clamp(4rem, 10vw, 8rem) 1.5rem; }
.block-title { font-size: clamp(2rem, 5vw, 3.6rem); letter-spacing: -.03em; line-height: 1.08; margin-bottom: 2.5rem; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card { display: block; padding: 1.6rem; border-radius: 22px; background: var(--surface); border: 1px solid var(--line); transition: transform .35s ease, border-color .35s, background .35s; }
@media (hover: hover) { a.card:hover, .project:hover { transform: translateY(-6px); border-color: rgba(41, 151, 255, .5); background: var(--surface-2); } }
.card h3 { font-size: 1.2rem; margin-bottom: .6rem; }
.card-emoji { font-size: 2rem; margin-bottom: .5rem; }
.card p { color: #c7c7cc; }
.card-link { margin-top: .8rem; color: var(--blue) !important; font-weight: 500; }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; }
.chips li { padding: .25rem .7rem; border-radius: 999px; background: rgba(255, 255, 255, .08); font-size: .88rem; color: #e5e5ea; }
.badge { display: inline-block; margin-bottom: .6rem; padding: .2rem .7rem; border-radius: 999px; background: var(--grad); font-size: .78rem; font-weight: 600; }
.projects { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.contact { text-align: center; }
.contact .block-title { margin-bottom: 1rem; }

.actions { display: flex; flex-wrap: wrap; gap: .8rem; justify-content: center; margin-top: 1.6rem; }
.actions.left { justify-content: flex-start; }
.btn { display: inline-block; padding: .8rem 1.5rem; border: 1px solid var(--line); border-radius: 999px; background: var(--surface-2); color: var(--text); font: inherit; font-weight: 500; cursor: pointer; transition: transform .2s, background .2s; }
.btn:hover { transform: translateY(-2px); background: #2c2c2e; }
.btn-primary { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn-primary:hover { background: #0a84ff; }
.btn-ghost { background: transparent; }

.footer { text-align: center; padding: 3rem 1.5rem; color: var(--muted); font-size: .9rem; border-top: 1px solid var(--line); }
.footer p + p { margin-top: .4rem; }

/* Apparition au scroll des sections */
.js .reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s ease, transform .8s ease; }
.js .reveal.visible { opacity: 1; transform: none; }

#toast { position: fixed; bottom: 24px; left: 50%; transform: translate(-50%, 20px); padding: .8rem 1.3rem; border-radius: 999px; background: #2c2c2e; border: 1px solid var(--line); opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s; z-index: 100; }
#toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (prefers-reduced-motion: reduce) {
    .media-item { filter: none; }
    html { scroll-behavior: auto; }
    .js .reveal { opacity: 1; transform: none; transition: none; }
}