/* ====================================================================
   PORTFOLIO — Félis VIRAMA · Design system "Glass Aurora" (ADR-016)
   100% CSS natif 2026 : @layer, OKLCH, color-mix, scroll-driven
   animations (animation-timeline), View Transitions, glassmorphism.
   Zéro dépendance d'animation tierce (ex-GSAP/ScrollTrigger/Lenis).
   ==================================================================== */

@layer reset, tokens, base, layout, components, motion, responsive, a11y;

/* ====================================================================
   TOKENS
   ==================================================================== */
@layer tokens {
    :root {
        /* Surfaces — dark bleuté profond (ADR-016) */
        --bg: oklch(13% 0.018 275);
        --bg-alt: oklch(16% 0.022 275);
        --bg-elev: oklch(20% 0.026 275);
        --bg-card: oklch(19% 0.024 275);
        --bg-hover: oklch(24% 0.028 275);

        /* Texte (contrastes WCAG AA conservés) */
        --text: oklch(96% 0.005 270);
        --text-2: oklch(74% 0.012 270);
        --text-3: oklch(64% 0.014 270); /* ≥ 5:1 sur --bg */

        /* Accents aurora (vert → cyan → violet) */
        --accent: oklch(84% 0.20 158);   /* vert néon signature */
        --accent-2: oklch(80% 0.13 220);  /* cyan */
        --accent-3: oklch(67% 0.19 305);  /* violet */
        --red: oklch(66% 0.22 18);

        /* Dérivés color-mix (fin du couplage chromatique rgba hardcodés) */
        --accent-soft: color-mix(in oklch, var(--accent), transparent 86%);
        --accent-2-soft: color-mix(in oklch, var(--accent-2), transparent 86%);
        --accent-3-soft: color-mix(in oklch, var(--accent-3), transparent 86%);
        --accent-faint: color-mix(in oklch, var(--accent), transparent 94%);
        --accent-glow: color-mix(in oklch, var(--accent), transparent 62%);

        /* Verre & traits */
        --glass: color-mix(in oklch, var(--bg-elev) 62%, transparent);
        --glass-strong: color-mix(in oklch, var(--bg-elev) 84%, transparent);
        --glass-border: color-mix(in oklch, white 14%, transparent);
        --border: color-mix(in oklch, white 8%, transparent);
        --border-light: color-mix(in oklch, white 15%, transparent);

        /* Rayons (arrondis premium) */
        --r-xs: 8px;
        --r-sm: 12px;
        --r: 18px;
        --r-lg: 24px;
        --r-xl: 32px;
        --r-full: 999px;

        /* Élévation & glow */
        --shadow: 0 24px 60px -28px oklch(0% 0 0 / 0.75);
        --shadow-lg: 0 40px 90px -36px oklch(0% 0 0 / 0.8);
        --glow: 0 0 48px var(--accent-glow);

        /* Typographie (self-hosted woff2, ADR-015 — inchangée) */
        --font-sans: 'Space Grotesk', sans-serif;
        --font-body: 'Inter', sans-serif;
        --font-mono: 'JetBrains Mono', monospace;

        /* Timing */
        --ease: cubic-bezier(0.16, 1, 0.3, 1);
        --ease-soft: cubic-bezier(0.33, 1, 0.68, 1);

        /* Layout */
        --container: 1200px;
        --gutter: clamp(1.5rem, 4vw, 3rem);

        color-scheme: dark;
        accent-color: var(--accent);
    }
}

/* ====================================================================
   RESET
   ==================================================================== */
@layer reset {
    *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
    html {
        font-size: 16px;
        -webkit-font-smoothing: antialiased;
        scroll-behavior: smooth;        /* remplace Lenis */
        scroll-padding-top: 5rem;
    }
    html.is-loading, html.menu-open { overflow: hidden; }
    img, canvas { display: block; max-width: 100%; }
    button { font-family: inherit; color: inherit; background: none; border: none; }
    a { color: inherit; text-decoration: none; }
    :where(ul) { list-style: none; }
}

/* ====================================================================
   BASE
   ==================================================================== */
@layer base {
    body {
        font-family: var(--font-body);
        background: var(--bg);
        color: var(--text);
        line-height: 1.6;
        overflow-x: hidden;
        position: relative;
        min-height: 100dvh;
        text-rendering: optimizeLegibility;
    }

    h1, h2, h3 { font-family: var(--font-sans); font-weight: 700; line-height: 1.08; text-wrap: balance; }
    p { text-wrap: pretty; }
    .mono { font-family: var(--font-mono); }
    .accent { color: var(--accent); }
    ::selection { background: var(--accent-soft); color: var(--text); }

    /* ----- Aurora globale : fond animé vert → cyan → violet ----- */
    .aurora {
        position: fixed;
        inset: -20% -10% auto -10%;
        height: 130vh;
        z-index: -2;
        pointer-events: none;
        will-change: transform;
        isolation: isolate;
        filter: blur(80px) saturate(135%);
        opacity: 0.55;
        background:
            radial-gradient(40% 40% at 18% 22%, var(--accent) 0%, transparent 60%),
            radial-gradient(38% 42% at 82% 18%, var(--accent-2) 0%, transparent 62%),
            radial-gradient(46% 46% at 62% 78%, var(--accent-3) 0%, transparent 60%);
        background-blend-mode: screen;
        animation: aurora-drift 26s var(--ease-soft) infinite alternate;
    }
    .aurora::after {
        content: '';
        position: absolute;
        inset: 0;
        background: radial-gradient(50% 50% at 50% 0%, transparent 40%, var(--bg) 92%);
    }
    /* Voile grain/vignette pour ancrer le verre sur le fond flou */
    body::after {
        content: '';
        position: fixed;
        inset: 0;
        z-index: -1;
        pointer-events: none;
        background: radial-gradient(120% 90% at 50% 0%, transparent 55%, color-mix(in oklch, var(--bg) 88%, black) 100%);
    }
    @keyframes aurora-drift {
        0%   { transform: translate3d(-4%, -2%, 0) rotate(-3deg) scale(1.05); }
        100% { transform: translate3d(5%, 3%, 0) rotate(4deg) scale(1.15); }
    }
}

/* ====================================================================
   COMPONENTS
   ==================================================================== */
@layer components {

    /* ----- Skip link (a11y) ----- */
    .skip-link {
        position: absolute; top: .5rem; left: .5rem; z-index: 1100;
        display: inline-flex; align-items: center; min-height: 44px;
        padding: .6rem 1.25rem; background: var(--accent); color: var(--bg);
        font-family: var(--font-mono); font-size: .9rem; font-weight: 500;
        border-radius: var(--r-xs); transform: translateY(-160%);
        transition: transform .25s var(--ease);
    }
    .skip-link:focus { transform: translateY(0); outline: 2px solid var(--bg); outline-offset: 2px; }

    .sr-only {
        position: absolute; width: 1px; height: 1px;
        padding: 0; margin: -1px; overflow: hidden;
        clip-path: inset(50%); white-space: nowrap; border: 0;
    }

    /* ----- Loader ----- */
    .loader {
        position: fixed; inset: 0; z-index: 1000; background: var(--bg);
        display: flex; align-items: flex-end; justify-content: flex-end;
        padding: 3rem; transition: opacity .7s var(--ease), visibility .7s;
    }
    .loader.done { opacity: 0; visibility: hidden; pointer-events: none; }
    .loader-counter {
        font-size: clamp(4rem, 12vw, 10rem); font-weight: 700; line-height: 1;
        color: transparent; background: linear-gradient(120deg, var(--accent), var(--accent-2));
        -webkit-background-clip: text; background-clip: text;
    }

    /* ----- Cursor ----- */
    .cursor-dot {
        position: fixed; top: 0; left: 0; width: 12px; height: 12px;
        background: var(--accent); border-radius: 50%;
        pointer-events: none; z-index: 999; opacity: 0;
        mix-blend-mode: difference; will-change: transform;
        transition: width .35s var(--ease), height .35s var(--ease), opacity .3s;
    }
    .cursor-dot.hover { width: 56px; height: 56px; }
    @media (pointer: coarse) { .cursor-dot { display: none !important; } }

    /* ----- Nav (glass) ----- */
    .nav {
        position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
        display: flex; justify-content: space-between; align-items: center;
        padding: .9rem var(--gutter);
    }
    .nav::before {
        content: ''; position: absolute; inset: 0; z-index: -1;
        background: color-mix(in oklch, var(--bg) 55%, transparent);
        backdrop-filter: blur(14px) saturate(130%);
        -webkit-backdrop-filter: blur(14px) saturate(130%);
        border-bottom: 1px solid var(--border);
        opacity: 0; transition: opacity .4s var(--ease);
    }
    .nav.scrolled::before { opacity: 1; }
    .nav-logo { font-family: var(--font-sans); font-size: 1.4rem; font-weight: 700; letter-spacing: -1px; color: var(--text); }
    .nav-center {
        position: absolute; left: 50%; transform: translateX(-50%);
        font-size: .6rem; letter-spacing: .22em; color: var(--text-3); text-transform: uppercase;
    }
    .nav-menu { width: 32px; height: 18px; cursor: pointer; display: flex; flex-direction: column; justify-content: space-between; }
    .nav-menu span { display: block; width: 100%; height: 1.5px; background: var(--text); border-radius: 2px; transition: transform .4s var(--ease), opacity .3s; transform-origin: center; }
    .nav-menu.active span:first-child { transform: rotate(45deg) translate(5px, 5px); }
    .nav-menu.active span:last-child { transform: rotate(-45deg) translate(5px, -5px); }

    /* ----- Menu overlay (glass) ----- */
    .menu-overlay {
        position: fixed; inset: 0; z-index: 90;
        background: color-mix(in oklch, var(--bg) 78%, transparent);
        backdrop-filter: blur(26px) saturate(120%);
        -webkit-backdrop-filter: blur(26px) saturate(120%);
        display: flex; flex-direction: column; justify-content: center;
        padding: 0 var(--gutter);
        clip-path: inset(0 0 100% 0); transition: clip-path .7s var(--ease);
    }
    .menu-overlay.active { clip-path: inset(0 0 0 0); }
    .menu-link {
        font-family: var(--font-sans); font-size: clamp(2.5rem, 8vw, 5rem);
        font-weight: 700; display: block; padding: .5rem 0; position: relative;
        color: var(--text-3); border-bottom: 1px solid var(--border);
        transition: color .3s, padding-left .4s var(--ease);
    }
    .menu-link:hover, .menu-link:focus-visible { color: var(--text); padding-left: 2rem; }
    .menu-link::before {
        content: ''; position: absolute; left: 0; top: 50%; width: 0; height: 2px;
        background: linear-gradient(90deg, var(--accent), var(--accent-2));
        transition: width .4s var(--ease); transform: translateY(-50%);
    }
    .menu-link:hover::before, .menu-link:focus-visible::before { width: 1rem; }
    .menu-footer {
        position: absolute; bottom: 2rem; left: var(--gutter); right: var(--gutter);
        display: flex; justify-content: space-between; align-items: center;
        border-top: 1px solid var(--border); padding-top: 1.5rem;
        font-size: .85rem; color: var(--text-3);
    }
    .menu-footer a:hover { color: var(--accent); }
    .menu-socials { display: flex; gap: 2rem; }

    /* ----- Progress (scroll-driven) ----- */
    .progress-track {
        position: fixed; right: var(--gutter); top: 50%; transform: translateY(-50%);
        width: 3px; height: 72px; background: var(--border); z-index: 80;
        border-radius: var(--r-full); overflow: hidden;
    }
    .progress-fill {
        width: 100%; height: 100%; transform-origin: top; scale: 1 0;
        background: linear-gradient(var(--accent), var(--accent-2));
        border-radius: var(--r-full);
    }

    /* ----- Hero ----- */
    .hero {
        min-height: 100dvh; display: flex; flex-direction: column;
        justify-content: space-between; padding: 8rem var(--gutter) 3rem;
        position: relative; overflow: hidden;
    }
    .hero-canvas { position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; pointer-events: none; opacity: .9; }
    .hero-top, .hero-name, .hero-bottom, .scroll-cue { position: relative; z-index: 1; }

    .hero-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: auto; }
    .hero-tag {
        font-size: .6rem; letter-spacing: .25em; color: var(--text-2);
        padding: .4rem .8rem; border: 1px solid var(--glass-border); border-radius: var(--r-full);
        background: var(--glass); backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
    }
    .hero-avail {
        display: flex; align-items: center; gap: .5rem; font-size: .8rem; color: var(--text-2);
        padding: .4rem .9rem; border: 1px solid var(--accent-soft); border-radius: var(--r-full);
        background: var(--accent-faint);
    }
    .pulse {
        width: 6px; height: 6px; background: var(--accent); border-radius: 50%;
        box-shadow: 0 0 10px var(--accent); animation: pulse 2s ease-in-out infinite;
    }
    @keyframes pulse { 50% { opacity: .3; } }

    .hero-name { padding: 4rem 0 3rem; user-select: none; }
    .hero-line {
        display: block; font-size: clamp(4rem, 14.5vw, 15rem);
        font-weight: 700; letter-spacing: -0.06em; line-height: .88; overflow: hidden;
    }
    .hero-line:last-child {
        background: linear-gradient(100deg, var(--text) 30%, var(--accent) 70%, var(--accent-2));
        -webkit-background-clip: text; background-clip: text; color: transparent;
    }
    .hero-line .char { display: inline-block; will-change: transform; }

    .hero-bottom { display: flex; justify-content: space-between; align-items: flex-end; gap: 2rem; flex-wrap: wrap; }
    .hero-rule { width: 40px; height: 2px; background: linear-gradient(90deg, var(--accent), transparent); margin-bottom: 1.25rem; border-radius: 2px; }
    .hero-role { font-family: var(--font-sans); font-size: clamp(1rem, 2vw, 1.35rem); font-weight: 500; margin-bottom: .5rem; }
    .hero-bio { color: var(--text-2); font-size: .95rem; max-width: 380px; }
    .hero-location { font-size: .6rem; letter-spacing: .15em; color: var(--text-3); text-align: right; display: flex; flex-direction: column; gap: .25rem; }

    .scroll-cue { position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%); }
    .scroll-line { width: 1px; height: 40px; background: linear-gradient(to bottom, var(--accent), transparent); animation: scrollPulse 2s ease-in-out infinite; }
    @keyframes scrollPulse { 0%,100% { opacity: 1; } 50% { opacity: .2; } }

    /* ----- Marquee ----- */
    .marquee { border-block: 1px solid var(--border); padding: 1rem 0; overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent); mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent); }
    .marquee-track { display: flex; gap: 3rem; white-space: nowrap; animation: marquee 42s linear infinite; font-size: .7rem; letter-spacing: .15em; color: var(--text-3); width: max-content; }
    .marquee--reverse .marquee-track { animation-direction: reverse; }
    @keyframes marquee { to { transform: translateX(-50%); } }
    .marquee-track span { opacity: .45; }

    /* ----- Sections ----- */
    .section { padding: clamp(6rem, 12vh, 10rem) var(--gutter); position: relative; }
    .section + .section { border-top: 1px solid var(--border); }
    .section--dark { background: color-mix(in oklch, var(--bg-alt) 55%, transparent); }
    .section-grid { max-width: var(--container); margin: 0 auto; display: grid; grid-template-columns: 80px 1fr; gap: 2rem; }
    .section-num { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .15em; color: var(--accent); padding-top: .3rem; }
    .section-title { font-size: clamp(2rem, 4.5vw, 3.5rem); letter-spacing: -.04em; margin-bottom: 3rem; }
    .section-title::after { content: ''; display: block; width: 40px; height: 2px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); margin-top: 1rem; border-radius: 2px; }

    /* ----- About ----- */
    .about-split { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; margin-bottom: 4rem; }
    .lead { font-size: 1.15rem; font-weight: 500; line-height: 1.7; margin-bottom: 1.5rem; }
    .body { color: var(--text-2); line-height: 1.8; }
    .about-extra strong { color: var(--text); font-weight: 500; }

    .about-card {
        background: var(--glass); backdrop-filter: blur(16px) saturate(140%);
        -webkit-backdrop-filter: blur(16px) saturate(140%);
        border: 1px solid var(--glass-border); border-radius: var(--r-lg);
        padding: 1.75rem; overflow: hidden; box-shadow: var(--shadow);
        position: relative;
    }
    .about-card::before {
        content: ''; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
        background: linear-gradient(135deg, var(--accent-soft), transparent 45%, var(--accent-2-soft));
        -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
        -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
    }
    .neofetch { font-size: .7rem; line-height: 1.9; color: var(--text-2); white-space: pre; overflow-x: auto; }
    .neofetch .key { color: var(--accent); }
    .neofetch .val { color: var(--text); }

    .stats { display: flex; gap: 4rem; padding-top: 3rem; border-top: 1px solid var(--border); flex-wrap: wrap; }
    .stat-val { font-family: var(--font-sans); font-size: 3rem; font-weight: 700; letter-spacing: -.04em; line-height: 1; background: linear-gradient(120deg, var(--text), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
    .stat-label { font-size: .8rem; color: var(--text-3); margin-top: .5rem; }
    .about-link { color: var(--accent); border-bottom: 1px solid var(--accent-soft); transition: border-color .3s; }
    .about-link:hover { border-bottom-color: var(--accent); }

    /* ----- Skills (hover/focus to reveal) ----- */
    .skill-item { border-bottom: 1px solid var(--border); overflow: hidden; border-radius: var(--r-xs); }
    .skill-item:first-child { border-top: 1px solid var(--border); }
    .skill-head { display: flex; align-items: center; gap: 1.5rem; padding: 1.75rem 1rem 1.75rem 0; transition: padding-left .4s var(--ease), background .4s var(--ease); }
    .skill-item:hover .skill-head, .skill-item:focus-within .skill-head { padding-left: 1rem; background: linear-gradient(90deg, var(--accent-faint), transparent 60%); }
    .skill-index { font-family: var(--font-mono); font-size: .6rem; color: var(--accent); letter-spacing: .1em; flex-shrink: 0; }
    .skill-name { font-size: clamp(1.1rem, 2vw, 1.5rem); font-weight: 600; transition: color .3s; }
    .skill-item:hover .skill-name, .skill-item:focus-within .skill-name { color: var(--accent); }

    .skill-reveal { max-height: 0; opacity: 0; padding: 0 0 0 3.5rem; transition: max-height .5s var(--ease), opacity .4s, padding-bottom .5s; overflow: hidden; }
    .skill-item:hover .skill-reveal, .skill-item:focus-within .skill-reveal { max-height: 220px; opacity: 1; padding-bottom: 1.75rem; }
    .skill-desc { color: var(--text-2); font-size: .88rem; margin-bottom: .75rem; line-height: 1.6; }

    .skill-bar { height: 4px; background: var(--border); border-radius: var(--r-full); margin-bottom: .75rem; overflow: hidden; width: min(240px, 100%); }
    .skill-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: var(--r-full); transition: width 1s var(--ease); }
    .skill-fill--blue { background: linear-gradient(90deg, var(--accent-2), var(--accent-3)); }
    .skill-fill--red { background: linear-gradient(90deg, var(--red), var(--accent-3)); }
    .skill-item:hover .skill-fill, .skill-item:focus-within .skill-fill { width: var(--level); }
    .skill-tags { font-size: .68rem; color: var(--text-3); letter-spacing: .03em; }

    /* ----- Experience ----- */
    .exp-filters { display: flex; gap: .5rem; margin-bottom: 2.5rem; flex-wrap: wrap; }
    .exp-filter { border: 1px solid var(--border); color: var(--text-3); padding: .45rem 1.1rem; border-radius: var(--r-full); font-size: .78rem; cursor: pointer; transition: border-color .3s, color .3s, background .3s; }
    .exp-filter:hover { border-color: var(--border-light); color: var(--text-2); }
    .exp-filter.active { background: var(--text); color: var(--bg); border-color: var(--text); }

    .exp-list { display: flex; flex-direction: column; gap: 1rem; }
    .exp-card {
        display: flex; background: var(--glass); backdrop-filter: blur(12px) saturate(130%);
        -webkit-backdrop-filter: blur(12px) saturate(130%);
        border: 1px solid var(--border); border-radius: var(--r); overflow: hidden;
        transition: border-color .45s var(--ease), transform .45s var(--ease), box-shadow .45s var(--ease);
    }
    .exp-card:hover { border-color: var(--border-light); transform: translateY(-3px); box-shadow: var(--shadow); }
    .exp-accent { width: 4px; flex-shrink: 0; background: var(--accent-3); transition: width .3s var(--ease); }
    .exp-card[data-type="alternance"] .exp-accent { background: var(--accent-2); }
    .exp-card:hover .exp-accent { width: 6px; }
    .exp-card--active { border-color: var(--accent-soft); background: linear-gradient(135deg, var(--accent-faint), var(--glass)); }
    .exp-card--active .exp-accent { background: var(--accent); box-shadow: 0 0 14px var(--accent-glow); }

    .exp-card-body { padding: 2rem 2.25rem; flex: 1; min-width: 0; }
    .exp-card-top { display: flex; align-items: center; gap: .75rem; flex-wrap: wrap; margin-bottom: 1rem; }
    .exp-date { font-size: .68rem; color: var(--text-3); letter-spacing: .05em; }
    .exp-type { font-size: .5rem; letter-spacing: .08em; padding: .2rem .55rem; border-radius: var(--r-xs); font-weight: 600; }
    .exp-type--alt { background: var(--accent-2-soft); color: var(--accent-2); border: 1px solid color-mix(in oklch, var(--accent-2), transparent 80%); }
    .exp-type--stage { background: var(--accent-3-soft); color: var(--accent-3); border: 1px solid color-mix(in oklch, var(--accent-3), transparent 80%); }
    .exp-live { display: inline-flex; align-items: center; gap: .4rem; font-size: .5rem; letter-spacing: .08em; color: var(--accent); background: var(--accent-faint); border: 1px solid var(--accent-soft); padding: .2rem .55rem; border-radius: var(--r-xs); }
    .exp-live .pulse { width: 5px; height: 5px; }

    .exp-card-role { font-family: var(--font-sans); font-size: clamp(1.05rem, 1.5vw, 1.3rem); font-weight: 600; margin-bottom: .25rem; transition: color .3s; }
    .exp-card:hover .exp-card-role { color: var(--accent); }
    .exp-card-company { color: var(--text-2); font-size: .9rem; font-weight: 400; margin-bottom: 1rem; }
    .exp-card-summary { color: var(--text-3); font-size: .83rem; line-height: 1.65; margin-bottom: 1.25rem; max-width: 540px; }

    .exp-card-toggle { border: 1px solid var(--border); color: var(--text-2); font-size: .78rem; font-weight: 500; cursor: pointer; display: inline-flex; align-items: center; gap: .75rem; padding: .5rem 1rem; border-radius: var(--r-sm); font-family: var(--font-body); transition: border-color .35s, color .35s; }
    .exp-card-toggle:hover, .exp-card.expanded .exp-card-toggle { border-color: var(--accent); color: var(--accent); }
    .toggle-icon { font-size: 1rem; line-height: 1; font-weight: 300; transition: transform .35s var(--ease); }
    .exp-card.expanded .toggle-icon { transform: rotate(135deg); }

    /* Expand — grid-rows + interpolate-size pour height auto fluide */
    .exp-expand { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .5s var(--ease); }
    .exp-card.expanded .exp-expand { grid-template-rows: 1fr; }
    .exp-expand-inner { overflow: hidden; }
    .exp-expand-inner > :first-child { margin-top: 2rem; padding-top: 2rem; border-top: 1px solid var(--border); }
    .exp-expand-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; margin-bottom: 2rem; }
    .exp-expand-label { font-family: var(--font-mono); font-size: .6rem; letter-spacing: .12em; color: var(--accent); text-transform: uppercase; margin-bottom: .75rem; font-weight: 500; }
    .exp-expand-text { color: var(--text-2); font-size: .85rem; line-height: 1.75; }
    .exp-expand-list li { padding-left: 1.25rem; position: relative; margin-bottom: .5rem; color: var(--text-2); font-size: .83rem; line-height: 1.55; }
    .exp-expand-list li::before { content: '→'; position: absolute; left: 0; color: var(--accent); font-size: .8rem; }
    .exp-expand-meta { display: flex; gap: 2.5rem; margin-bottom: 1.5rem; font-size: .82rem; color: var(--text-3); flex-wrap: wrap; }
    .exp-expand-meta strong { color: var(--text-2); margin-right: .5rem; font-weight: 500; }
    .exp-expand-tags { display: flex; flex-wrap: wrap; gap: .4rem; padding-bottom: .5rem; }
    .exp-tag { font-family: var(--font-mono); font-size: .62rem; color: var(--text-3); letter-spacing: .03em; border: 1px solid var(--border); padding: .22rem .55rem; border-radius: var(--r-xs); transition: border-color .3s, color .3s; }
    .exp-tag:hover { border-color: var(--border-light); color: var(--text-2); }

    /* ----- Formation ----- */
    .edu-item { display: grid; grid-template-columns: 140px 1fr; gap: 2rem; padding: 2rem 0; border-bottom: 1px solid var(--border); }
    .edu-item:first-child { border-top: 1px solid var(--border); }
    .edu-period { font-family: var(--font-mono); font-size: .7rem; color: var(--text-3); letter-spacing: .05em; padding-top: .2rem; }
    .edu-degree { font-family: var(--font-sans); font-weight: 600; font-size: 1.15rem; margin-bottom: .25rem; }
    .edu-school { color: var(--text-2); font-size: .88rem; margin-bottom: .5rem; }
    .edu-desc { color: var(--text-3); font-size: .85rem; line-height: 1.6; }
    .edu-status { display: inline-flex; align-items: center; gap: .4rem; font-family: var(--font-mono); font-size: .55rem; letter-spacing: .08em; margin-top: .75rem; padding: .18rem .5rem; border-radius: var(--r-xs); }
    .edu-status--active { color: var(--accent); border: 1px solid var(--accent-soft); background: var(--accent-faint); }
    .edu-status--done { color: var(--text-3); border: 1px solid var(--border); }

    /* ----- Projects — scroll-snap horizontal natif (ex-pin GSAP) ----- */
    .projects-wrap { overflow: hidden; padding-block: clamp(4rem, 9vh, 7rem); border-top: 1px solid var(--border); }
    .projects-pin { display: flex; flex-direction: column; gap: 2rem; }
    .projects-head { display: flex; justify-content: space-between; align-items: flex-end; padding: 0 var(--gutter); }
    .projects-head h2 { font-size: clamp(1.5rem, 3vw, 2.5rem); letter-spacing: -.03em; margin-top: .5rem; }
    .projects-head .section-num { display: block; }
    .projects-counter { font-family: var(--font-mono); font-size: .7rem; color: var(--text-3); letter-spacing: .1em; }
    .projects-counter b { color: var(--accent); font-weight: 500; }

    .projects-track {
        display: flex; gap: 1.5rem; padding: .5rem var(--gutter) 1.5rem;
        overflow-x: auto; scroll-snap-type: x mandatory; scroll-padding-left: var(--gutter);
        scrollbar-width: thin; scrollbar-color: var(--border-light) transparent;
        overscroll-behavior-x: contain;
    }
    .projects-track::-webkit-scrollbar { height: 6px; }
    .projects-track::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: var(--r-full); }

    .pcard {
        min-width: clamp(300px, 52vw, 640px); flex-shrink: 0; scroll-snap-align: start;
        background: var(--glass); backdrop-filter: blur(16px) saturate(140%);
        -webkit-backdrop-filter: blur(16px) saturate(140%);
        border: 1px solid var(--glass-border); border-radius: var(--r-lg);
        padding: 3rem; display: flex; flex-direction: column; justify-content: space-between;
        position: relative; overflow: hidden; box-shadow: var(--shadow);
        transition: border-color .4s, transform .5s var(--ease), box-shadow .5s var(--ease);
    }
    .pcard:hover { border-color: var(--accent-soft); transform: translateY(-4px); box-shadow: var(--shadow-lg); }
    .pcard::before { content: ''; position: absolute; top: 0; right: 0; width: 220px; height: 220px; border-radius: 50%; background: radial-gradient(circle, var(--accent-soft), transparent 70%); transform: translate(30%, -30%); pointer-events: none; }
    .pcard-top { margin-bottom: auto; }
    .pcard-num { font-family: var(--font-mono); font-size: .6rem; color: var(--accent); letter-spacing: .15em; display: block; margin-bottom: 1.5rem; }
    .pcard-title { font-family: var(--font-sans); font-size: clamp(1.5rem, 2.5vw, 2rem); font-weight: 700; margin-bottom: 1rem; letter-spacing: -.02em; }
    .pcard-desc { color: var(--text-2); font-size: .9rem; line-height: 1.7; max-width: 400px; }
    .pcard-bottom { margin-top: 2rem; display: flex; justify-content: space-between; align-items: flex-end; gap: 1rem; }
    .pcard-tags { font-family: var(--font-mono); font-size: .68rem; color: var(--text-3); letter-spacing: .03em; }
    .pcard-stat { text-align: right; flex-shrink: 0; }
    .pcard-stat-val { font-family: var(--font-sans); font-size: 2.5rem; font-weight: 700; line-height: 1; display: block; background: linear-gradient(120deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
    .pcard-stat-label { font-family: var(--font-mono); font-size: .6rem; color: var(--text-3); letter-spacing: .08em; text-transform: uppercase; }

    /* ----- Contact ----- */
    .section--contact { border-top: 1px solid var(--border); min-height: 80vh; display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; }
    .contact-glow { position: absolute; border-radius: 50%; filter: blur(120px); pointer-events: none; opacity: 0; transition: opacity 1.2s; }
    .glow-1 { width: 420px; height: 420px; background: var(--accent); top: 18%; left: 12%; }
    .glow-2 { width: 360px; height: 360px; background: var(--accent-2); bottom: 8%; right: 16%; }
    .glow-3 { width: 300px; height: 300px; background: var(--accent-3); top: 40%; right: 38%; }
    .glow-1.visible { opacity: .14; }
    .glow-2.visible { opacity: .12; }
    .glow-3.visible { opacity: .10; }
    .contact-inner { text-align: center; max-width: 720px; position: relative; z-index: 1; padding: 4rem var(--gutter); }
    .contact-inner .section-num { display: block; margin-bottom: 2rem; }
    .contact-heading { font-size: clamp(2.5rem, 7vw, 5rem); letter-spacing: -.05em; margin-bottom: 3rem; }
    .contact-heading .line { display: block; }
    .contact-heading .line:last-child { background: linear-gradient(100deg, var(--text), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
    .contact-email { display: inline-block; font-family: var(--font-mono); font-size: clamp(.85rem, 1.8vw, 1.15rem); color: var(--accent); border-bottom: 1px solid var(--accent-soft); padding-bottom: .25rem; transition: border-color .3s, text-shadow .3s; letter-spacing: .02em; }
    .contact-email:hover { border-color: var(--accent); text-shadow: 0 0 24px var(--accent-glow); }
    .contact-links { margin-top: 3rem; display: flex; justify-content: center; gap: 2.5rem; font-size: .88rem; color: var(--text-3); }
    .contact-links a { transition: color .3s; }
    .contact-links a:hover { color: var(--text); }

    /* ----- Footer ----- */
    .footer { border-top: 1px solid var(--border); padding: 2rem var(--gutter); }
    .footer-inner { max-width: var(--container); margin: 0 auto; display: flex; justify-content: space-between; align-items: center; font-family: var(--font-mono); font-size: .7rem; color: var(--text-3); letter-spacing: .05em; gap: 1.5rem; flex-wrap: wrap; }
    .footer-nav { display: flex; gap: 1.5rem; }
    .footer-nav a { color: var(--text-3); transition: color .3s; }
    .footer-nav a:hover { color: var(--accent); }

    /* ----- FAQ ----- */
    .faq-list { display: flex; flex-direction: column; gap: .75rem; max-width: 860px; }
    .faq-item {
        border: 1px solid var(--border); border-radius: var(--r-sm);
        background: var(--glass); backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px); overflow: hidden;
        transition: border-color .3s var(--ease);
    }
    .faq-item[open] { border-color: var(--accent-soft); }
    .faq-item summary { padding: 1.25rem 1.5rem; font-family: var(--font-sans); font-size: 1.05rem; font-weight: 500; color: var(--text); cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; font-family: var(--font-mono); color: var(--accent); font-size: 1.25rem; transition: transform .3s var(--ease); }
    .faq-item[open] summary::after { transform: rotate(135deg); }
    .faq-item p { padding: 0 1.5rem 1.25rem; color: var(--text-2); line-height: 1.7; }
    .faq-item p a { color: var(--accent); border-bottom: 1px solid var(--accent-soft); transition: border-color .3s; }
    .faq-item p a:hover { border-bottom-color: var(--accent); }

    /* ----- Subpage common (cv.html + methodologie.html) ----- */
    .subpage { min-height: 100vh; padding: 6rem var(--gutter) 4rem; max-width: var(--container); margin: 0 auto; }
    .subpage h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); margin-bottom: 1rem; letter-spacing: -.02em; background: linear-gradient(100deg, var(--text) 40%, var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
    .subpage .lead { font-size: 1.25rem; color: var(--text-2); line-height: 1.5; max-width: 720px; margin-bottom: 4rem; }
    .subpage-nav { display: flex; justify-content: space-between; align-items: center; padding-bottom: 3rem; border-bottom: 1px solid var(--border); margin-bottom: 4rem; }
    .subpage-nav a { font-family: var(--font-mono); font-size: .85rem; color: var(--text-2); transition: color .3s; }
    .subpage-nav a:hover, .subpage-nav a[aria-current="page"] { color: var(--accent); }
    .subpage-nav .logo { font-family: var(--font-sans); font-weight: 700; font-size: 1.2rem; color: var(--text); }
    .subpage-nav .logo .accent { color: var(--accent); }
    .subpage-links { display: flex; gap: 1.5rem; flex-wrap: wrap; }
}

/* ====================================================================
   MOTION — scroll-driven + entrées + View Transitions (natif 2026)
   ==================================================================== */
@layer motion {
    /* Transitions de page douces entre /, /cv, /methodologie */
    @view-transition { navigation: auto; }

    @media (prefers-reduced-motion: no-preference) {
        /* Entrée hero (ex-timeline GSAP) — jouée après le loader (.ready) */
        .ready .hero-top > * { animation: rise .7s var(--ease) both; }
        .ready .hero-top > *:nth-child(2) { animation-delay: .1s; }
        .ready .hero-line .char { animation: charIn 1s var(--ease) both; animation-delay: calc(.3s + var(--i, 0) * .03s); }
        .ready .hero-rule { animation: growX .8s var(--ease) both .7s; }
        .ready .hero-role { animation: rise .7s var(--ease) both .6s; }
        .ready .hero-bio { animation: rise .6s var(--ease) both .75s; }
        .ready .hero-location > * { animation: rise .6s var(--ease) both .85s; }
        .ready .scroll-cue { animation: fade 1s var(--ease) both 1.1s; }

        @keyframes charIn { from { transform: translateY(110%) rotate(4deg); } to { transform: translateY(0) rotate(0); } }
        @keyframes rise { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
        @keyframes growX { from { transform: scaleX(0); } to { transform: scaleX(1); } }
        @keyframes fade { from { opacity: 0; } to { opacity: 1; } }

        /* Scroll-driven : reveals appliqués directement sur les composants
           (zéro classe à injecter dans le markup SSR). Progressive
           enhancement : sans support, les éléments restent visibles. */
        @supports (animation-timeline: view()) {
            .section-title,
            .about-card,
            .stats,
            .skill-item,
            .exp-card,
            .edu-item,
            .faq-item,
            .projects-head,
            .contact-heading,
            .reveal {
                animation: reveal linear both;
                animation-timeline: view();
                animation-range: entry 0% cover 26%;
            }
            @keyframes reveal { from { opacity: 0; transform: translateY(2.5rem); } to { opacity: 1; transform: translateY(0); } }

            /* Progress latéral piloté par le scroll de la page */
            .progress-fill { animation: progress linear both; animation-timeline: scroll(root block); }
            @keyframes progress { from { scale: 1 0; } to { scale: 1 1; } }
        }
    }

    /* Custom View Transition (crossfade + léger slide) */
    @media (prefers-reduced-motion: no-preference) {
        ::view-transition-old(root) { animation: vt-out .35s var(--ease) both; }
        ::view-transition-new(root) { animation: vt-in .45s var(--ease) both; }
        @keyframes vt-out { to { opacity: 0; transform: translateY(-8px); } }
        @keyframes vt-in { from { opacity: 0; transform: translateY(8px); } }
    }
}

/* ====================================================================
   RESPONSIVE
   ==================================================================== */
@layer responsive {
    @media (max-width: 900px) {
        .section-grid { grid-template-columns: 1fr; }
        .section-left { display: none; }
        .section-title::before { content: attr(data-num); font-family: var(--font-mono); font-size: .6rem; letter-spacing: .15em; color: var(--accent); display: block; margin-bottom: .75rem; font-weight: 400; }
        .about-split { grid-template-columns: 1fr; gap: 2rem; }
        .stats { gap: 2rem; }
        .edu-item { grid-template-columns: 1fr; gap: .75rem; }
        .nav-center, .progress-track { display: none; }
        .skill-reveal { max-height: none; opacity: 1; padding-bottom: 1.5rem; }
        .skill-fill { width: var(--level); }
        .exp-card-body { padding: 1.5rem; }
        .exp-expand-grid { grid-template-columns: 1fr; gap: 1.5rem; }
        .exp-expand-meta { flex-direction: column; gap: .5rem; }
    }
    @media (max-width: 600px) {
        .hero-line { font-size: clamp(3rem, 17vw, 5rem); }
        .hero-bottom { flex-direction: column; align-items: flex-start; }
        .hero-location { text-align: left; flex-direction: row; gap: 1rem; }
        .contact-heading { font-size: clamp(2rem, 8vw, 3.5rem); }
        .footer-inner { flex-direction: column; gap: .5rem; }
        .menu-footer { flex-direction: column; gap: 1rem; align-items: flex-start; }
        .pcard { min-width: 84vw; padding: 2rem; }
        .scroll-cue { display: none; }
        /* C-002 : coupe le backdrop-filter sur les listes de cartes (INP mobile) */
        .exp-card, .pcard { backdrop-filter: none; -webkit-backdrop-filter: none; background: var(--bg-card); }
    }
    @media (max-width: 640px) {
        .subpage-nav { flex-direction: column; align-items: flex-start; gap: 1rem; }
        .subpage-links { width: 100%; }
    }
}

/* ====================================================================
   A11Y — focus, reduced-motion, print
   ==================================================================== */
@layer a11y {
    :focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

    @media (prefers-reduced-motion: reduce) {
        html { scroll-behavior: auto; }
        *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
        .aurora { animation: none; }
        .hero-canvas { display: none; }
        .reveal, .reveal-stagger > * { opacity: 1 !important; transform: none !important; }
    }

    @media print {
        .aurora, .loader, .cursor-dot, .nav, .menu-overlay, .progress-track, .scroll-cue, .exp-filters, .hero-canvas, .marquee, .contact-glow { display: none !important; }
        body::after { display: none; }
        body { background: #fff; color: #000; }
        .section + .section, .projects-wrap { border-color: #ddd; }
        .hero-line, .hero-line:last-child, .accent, .stat-val, .pcard-stat-val, .subpage h1, .contact-heading .line:last-child { color: #000 !important; -webkit-text-fill-color: #000; }
        .section--dark { background: #f8f8f8; }
        .about-card, .exp-card, .pcard, .faq-item { background: #fff; backdrop-filter: none; box-shadow: none; }
    }
}