/* ── KAISER//CO — style transgressif, brutaliste-poétique ─────────── */

:root {
    --bg: #f3efe8;
    --bg-2: #ece6db;
    --ink: #0a0a0a;
    --ink-soft: #2a2a2a;
    --accent: #ff3b1d;
    --accent-2: #1a3cf3;
    --rule: rgba(10, 10, 10, 0.15);
    --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.07 0'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
    --serif: 'Fraunces', 'Noto Serif SC', Georgia, serif;
    --sans: 'Space Grotesk', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --mono: 'JetBrains Mono', 'Noto Sans SC', ui-monospace, 'Cascadia Mono', Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--sans);
    background: var(--bg);
    color: var(--ink);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
body::before {
    content: '';
    position: fixed; inset: 0;
    background: var(--grain);
    pointer-events: none;
    mix-blend-mode: multiply;
    opacity: 0.35;
    z-index: 1000;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ── 1. HEADER FLOTTANT ───────────────────────────────────────────── */
#hdr {
    position: fixed;
    top: 0; left: 0; right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 32px;
    z-index: 100;
    mix-blend-mode: difference;
    color: #fff;
    transition: transform 0.4s ease;
}
#hdr.hide { transform: translateY(-100%); }

#hdr .logo {
    font-family: var(--mono);
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.05em;
    display: inline-flex;
    gap: 1px;
}
#hdr .logo em {
    color: var(--accent);
    font-style: normal;
    animation: logo-glitch 6s infinite;
}
@keyframes logo-glitch {
    0%, 92%, 100% { transform: translateX(0); opacity: 1; }
    93% { transform: translateX(-2px); opacity: 0.6; }
    95% { transform: translateX(2px); opacity: 0.8; }
    97% { transform: translateX(0); opacity: 1; }
}

#hdr nav {
    display: flex;
    gap: 28px;
    font-family: var(--mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
#hdr nav a { position: relative; }
#hdr nav a::after {
    content: ''; position: absolute;
    bottom: -4px; left: 0; right: 0;
    height: 1px; background: currentColor;
    transform: scaleX(0); transform-origin: right;
    transition: transform 0.3s ease;
}
#hdr nav a:hover::after { transform: scaleX(1); transform-origin: left; }

.lang-switcher {
    display: flex;
    gap: 4px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.05em;
}
.lang-switcher button {
    background: transparent;
    color: currentColor;
    border: 1px solid currentColor;
    padding: 4px 8px;
    cursor: pointer;
    font: inherit;
    text-transform: uppercase;
    opacity: 0.5;
    transition: opacity 0.2s ease, background 0.2s ease;
    line-height: 1;
}
.lang-switcher button:hover { opacity: 1; }
.lang-switcher button.active {
    opacity: 1;
    background: currentColor;
    color: var(--bg);
    mix-blend-mode: normal;
}

/* ── 2. HERO ÉCLATÉ ───────────────────────────────────────────────── */
.hero {
    min-height: 100vh;
    padding: 0 24px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
}
.hero-text {
    font-family: var(--serif);
    font-weight: 300;
    line-height: 0.9;
    letter-spacing: -0.04em;
    font-size: clamp(56px, 14vw, 220px);
    font-variation-settings: "opsz" 144;
    position: relative;
    z-index: 2;
}
.hero-text .line { display: block; }
.hero-text .l1 { padding-left: 0; }
.hero-text .l2 { padding-left: 8vw; font-style: italic; }
.hero-text .l3 { padding-left: 16vw; }
.hero-text .l4 {
    padding-left: 6vw;
    font-size: clamp(40px, 8vw, 120px);
    font-weight: 700;
    margin-top: 0.2em;
}
.hero-text .l4 b { color: var(--accent); font-weight: 700; }
.hero-text i.glitch { font-style: italic; position: relative; display: inline-block; }
.hero-text i.glitch::before,
.hero-text i.glitch::after {
    content: attr(data-text);
    position: absolute; top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
}
.hero-text i.glitch::before {
    color: var(--accent); transform: translate(-3px, 0);
    clip-path: polygon(0 12%, 100% 12%, 100% 35%, 0 35%);
    animation: g-shake 4s infinite;
}
.hero-text i.glitch::after {
    color: var(--accent-2); transform: translate(2px, 0);
    clip-path: polygon(0 60%, 100% 60%, 100% 80%, 0 80%);
    animation: g-shake 5.7s infinite reverse;
}
@keyframes g-shake {
    0%, 90%, 100% { transform: translate(0, 0); opacity: 0.9; }
    91% { transform: translate(-4px, 1px); opacity: 1; }
    93% { transform: translate(3px, -1px); }
    95% { transform: translate(-2px, 2px); }
}

.hero .cursor {
    display: inline-block;
    color: var(--accent);
    animation: blink 1s steps(2) infinite;
    margin-left: 0.1em;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-sub {
    margin-top: 32px;
    padding-left: 6vw;
    font-family: var(--mono);
    font-size: 13px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0.6;
    z-index: 2;
}
.hero-mark {
    position: absolute;
    bottom: 32px; right: 32px;
    width: 1px; height: 80px;
    background: var(--ink);
    transform-origin: bottom;
    animation: scroll-pulse 2.4s ease-in-out infinite;
}
@keyframes scroll-pulse {
    0%, 100% { transform: scaleY(0.2); opacity: 0.4; }
    50% { transform: scaleY(1); opacity: 1; }
}

/* ── 3. AVATAR + FAQ ──────────────────────────────────────────────── */
#avatar-section {
    background: var(--bg-2);
    padding: 80px 24px 120px;
    position: relative;
    border-top: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
}
.avatar-headline {
    text-align: left;
    padding-left: 4vw;
    margin-bottom: 32px;
}
.avatar-headline h2 {
    font-family: var(--serif);
    font-weight: 300;
    font-size: clamp(60px, 12vw, 180px);
    line-height: 0.85;
    letter-spacing: -0.04em;
    font-style: italic;
}
.avatar-headline p {
    font-family: var(--mono);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.6;
    margin-top: 16px;
}

.avatar-stage {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 48px;
    align-items: end;
    max-width: 1400px;
    margin: 0 auto;
}
@media (max-width: 900px) {
    .avatar-stage { grid-template-columns: 1fr; }
}

.avatar-slot {
    height: 600px;
    min-height: 480px;
    /* Remonte l'avatar de la hauteur d'une question (~80px) sur la page. */
    margin-top: -80px;
    /* Fond transparent : laisse voir --bg-2 derrière le canvas WebGL.
       Le renderer three.js est en alpha:true + clearColor 0x000000,0. */
    background: transparent;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    /* Fade-out court (~5%) pour éviter le bord net du canvas. */
    -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 94.5%, transparent 100%);
    mask-image: linear-gradient(to bottom, #000 0%, #000 94.5%, transparent 100%);
}
.avatar-slot canvas { display: block; }
.avatar-loading {
    font-family: var(--mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--ink);
    opacity: 0.4;
    text-align: center;
    line-height: 1.6;
    padding: 16px;
}

.faq-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
    /* Décale le bas de la liste 20px sous le bas du slot avatar. */
    margin-bottom: -20px;
    /* Limite la hauteur, ajoute un scroll interne avec un fade haut/bas. */
    max-height: 480px;
    overflow-y: auto;
    overflow-x: hidden;
    width: 100%;
    padding-right: 8px;
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, #000 6%, #000 94%, transparent 100%);
    mask-image: linear-gradient(to bottom, transparent 0%, #000 6%, #000 94%, transparent 100%);
    scrollbar-width: thin;
    scrollbar-color: rgba(10,10,10,0.25) transparent;
}
.faq-list::-webkit-scrollbar { width: 6px; }
.faq-list::-webkit-scrollbar-track { background: transparent; }
.faq-list::-webkit-scrollbar-thumb {
    background: rgba(10,10,10,0.25);
    border-radius: 3px;
}
.faq-list li button {
    width: 100%;
    background: transparent;
    border: none;
    border-top: 1px solid var(--rule);
    padding: 18px 0 18px 8px;
    text-align: left;
    font-family: var(--serif);
    font-weight: 400;
    font-size: clamp(18px, 2.4vw, 28px);
    color: var(--ink);
    cursor: pointer;
    display: flex;
    align-items: baseline;
    gap: 16px;
    transition: padding-left 0.25s ease, color 0.2s ease;
}
.faq-list li:last-child button { border-bottom: 1px solid var(--rule); }
.faq-list li button .num {
    font-family: var(--mono);
    font-size: 11px;
    opacity: 0.4;
    flex-shrink: 0;
    width: 28px;
}
.faq-list li button:hover { padding-left: 24px; color: var(--accent); }
.faq-list li button.active {
    color: var(--accent);
    padding-left: 24px;
}
.faq-list li button.active .num::before {
    content: '▸ ';
}

.faq-stop {
    position: fixed;
    bottom: 32px;
    right: 32px;
    background: var(--ink);
    color: var(--bg);
    border: none;
    padding: 14px 24px;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.1em;
    cursor: pointer;
    z-index: 50;
    border-radius: 0;
}
.faq-stop:hover { background: var(--accent); }

/* ── 4. MANIFESTO ─────────────────────────────────────────────────── */
.manifesto {
    background: var(--ink);
    color: var(--bg);
    padding: 160px 24px;
    overflow: hidden;
}
.manifesto .m-line {
    font-family: var(--serif);
    font-weight: 300;
    font-size: clamp(28px, 5vw, 64px);
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
    max-width: 18ch;
}
.manifesto .m1 { padding-left: 4vw; }
.manifesto .m2 { padding-left: 18vw; font-style: italic; opacity: 0.7; }
.manifesto .m3 { padding-left: 8vw; color: var(--accent); }
.manifesto .m4 { padding-left: 28vw; font-weight: 700; }
@media (max-width: 700px) {
    .manifesto .m-line { padding-left: 0 !important; }
}

/* ── 5. SERVICES (grille cassée) ──────────────────────────────────── */
.services {
    padding: 120px 24px;
    max-width: 1400px;
    margin: 0 auto;
}
.services-title {
    font-family: var(--serif);
    font-weight: 300;
    font-style: italic;
    font-size: clamp(44px, 9vw, 140px);
    letter-spacing: -0.04em;
    line-height: 0.9;
    margin-bottom: 80px;
    padding-left: 6vw;
}

.srv {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    margin-bottom: 120px;
    position: relative;
}
.srv:nth-child(odd) { grid-template-columns: 1fr 1fr; }
.srv:nth-child(even) .srv-img { order: 2; }
.srv-dev    { padding-left: 0; }
.srv-ia     { padding-right: 4vw; }
.srv-3d     { padding-left: 8vw; }
.srv-conseil{ padding-right: 0; }

.srv-img {
    aspect-ratio: 1 / 1;
    overflow: hidden;
    background: #1a1a1a;
}
.srv-img img {
    width: 100%; height: 100%;
    object-fit: cover;
    filter: contrast(1.05) saturate(0.9);
    transition: transform 1.2s ease, filter 0.6s ease;
}
.srv:hover .srv-img img { transform: scale(1.04); filter: contrast(1.1) saturate(1); }

.srv-body { padding: 24px; }
.srv-num {
    font-family: var(--mono);
    font-size: 13px;
    opacity: 0.4;
    letter-spacing: 0.1em;
}
.srv-body h3 {
    font-family: var(--serif);
    font-weight: 700;
    font-size: clamp(48px, 8vw, 112px);
    line-height: 0.9;
    margin: 8px 0 16px;
    letter-spacing: -0.05em;
}
.srv-body .srv-tag {
    font-family: var(--serif);
    font-style: italic;
    font-size: clamp(18px, 2vw, 24px);
    margin-bottom: 12px;
    color: var(--accent);
}
.srv-body .srv-desc {
    font-size: 16px;
    line-height: 1.55;
    max-width: 36ch;
    color: var(--ink-soft);
}
@media (max-width: 800px) {
    .srv, .srv:nth-child(odd) { grid-template-columns: 1fr; }
    .srv:nth-child(even) .srv-img { order: 0; }
    .srv-dev, .srv-ia, .srv-3d, .srv-conseil { padding: 0; }
}

/* ── 6. À PROPOS ──────────────────────────────────────────────────── */
.about {
    background: var(--ink);
    color: var(--bg);
    padding: 140px 24px;
    text-align: left;
}
.about-text {
    max-width: 900px;
    margin: 0 auto;
    padding-left: 4vw;
}
.about h2 {
    font-family: var(--serif);
    font-weight: 700;
    font-size: clamp(44px, 8vw, 120px);
    line-height: 0.9;
    letter-spacing: -0.04em;
    margin-bottom: 32px;
}
.about p {
    font-family: var(--serif);
    font-size: clamp(18px, 2vw, 26px);
    line-height: 1.45;
    max-width: 30ch;
    margin-bottom: 20px;
}
.about .about-meta {
    font-family: var(--mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.5;
    margin-top: 32px;
    max-width: none;
}

/* ── 7. CONTACT ───────────────────────────────────────────────────── */
.contact {
    padding: 180px 24px;
    text-align: center;
    background: var(--bg);
}
.contact-label {
    font-family: var(--mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    opacity: 0.5;
    margin-bottom: 32px;
}
.contact-mail {
    display: block;
    font-family: var(--serif);
    font-style: italic;
    font-weight: 300;
    font-size: clamp(32px, 7vw, 96px);
    letter-spacing: -0.04em;
    line-height: 1.05;
    color: var(--ink);
    transition: color 0.25s ease;
    word-break: break-word;
}
.contact-mail:hover { color: var(--accent); }
.contact-note {
    font-family: var(--mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.5;
    margin-top: 32px;
}

/* ── 8. FOOTER ────────────────────────────────────────────────────── */
footer {
    border-top: 1px solid var(--rule);
    padding: 40px 32px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    line-height: 1.6;
    opacity: 0.7;
}
.foot-right { text-align: right; }

/* ─────────────────────────────────────────────────────────────────────
   ── RESPONSIVE TABLET (≤900px) ───────────────────────────────────────
   ───────────────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
    /* Header */
    #hdr { padding: 14px 20px; }
    #hdr nav { gap: 18px; font-size: 11px; }

    /* Hero — réduire les décalages en escalier */
    .hero { padding: 0 20px; min-height: 92vh; }
    .hero-text .l1 { padding-left: 0; }
    .hero-text .l2 { padding-left: 4vw; }
    .hero-text .l3 { padding-left: 8vw; }
    .hero-text .l4 { padding-left: 3vw; }
    .hero-sub { padding-left: 3vw; }
    .hero-mark { right: 20px; bottom: 20px; height: 60px; }

    /* Avatar */
    #avatar-section { padding: 60px 20px 80px; }
    .avatar-headline { padding-left: 2vw; }
    .avatar-headline p { font-size: 12px; }
    .avatar-stage { gap: 32px; }
    .avatar-slot { height: 60vh; min-height: 420px; }
    .faq-list li button { padding: 14px 0 14px 4px; font-size: 18px; }

    /* Manifesto */
    .manifesto { padding: 100px 20px; }
    .manifesto .m-line { padding-left: 0 !important; max-width: none; }
    .manifesto .m4 { padding-left: 8vw !important; }

    /* Services */
    .services { padding: 80px 20px; }
    .services-title { padding-left: 2vw; margin-bottom: 56px; }

    /* About */
    .about { padding: 100px 20px; }
    .about-text { padding-left: 2vw; }
    .about p { max-width: none; }

    /* Contact */
    .contact { padding: 120px 20px; }
}

/* ─────────────────────────────────────────────────────────────────────
   ── RESPONSIVE MOBILE (≤640px) ───────────────────────────────────────
   ───────────────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
    /* Header */
    #hdr { padding: 12px 16px; }
    #hdr .logo { font-size: 12px; }
    #hdr nav { gap: 14px; font-size: 10px; }

    /* Hero — empilage propre, pas d'escaliers exagérés */
    .hero { padding: 0 16px; min-height: 90vh; }
    .hero-text { font-size: clamp(48px, 16vw, 96px); }
    .hero-text .line { padding-left: 0 !important; }
    .hero-text .l4 { font-size: clamp(36px, 12vw, 72px); margin-top: 0.15em; }
    .hero-sub { padding-left: 0; margin-top: 24px; font-size: 11px; }
    .hero-mark { right: 16px; bottom: 16px; height: 40px; }

    /* Avatar — slot plus court, FAQ en pleine largeur */
    #avatar-section { padding: 48px 16px 64px; border-top-width: 0; }
    .avatar-headline { padding-left: 0; margin-bottom: 24px; }
    .avatar-headline h2 { font-size: clamp(56px, 18vw, 100px); }
    .avatar-headline p { font-size: 11px; margin-top: 12px; }
    .avatar-stage { gap: 24px; }
    .avatar-slot { height: 56vh; min-height: 360px; max-height: 480px; margin-top: 0; }
    .faq-list { max-height: 360px; margin-bottom: 0; }
    .faq-list li button {
        padding: 14px 0;
        font-size: clamp(15px, 4.5vw, 19px);
        gap: 12px;
    }
    .faq-list li button .num { width: 22px; font-size: 10px; }
    .faq-list li button:hover, .faq-list li button.active { padding-left: 12px; }
    .faq-stop { bottom: 20px; right: 20px; padding: 12px 18px; font-size: 11px; }

    /* Manifesto — toutes lignes alignées gauche */
    .manifesto { padding: 80px 16px; }
    .manifesto .m-line {
        padding-left: 0 !important;
        font-size: clamp(24px, 7vw, 38px);
        max-width: none;
    }
    .manifesto .m4 { padding-left: 0 !important; }

    /* Services — empilés cleanly, image 16/10 plutôt que carré */
    .services { padding: 64px 16px; }
    .services-title { padding-left: 0; font-size: clamp(36px, 12vw, 72px); margin-bottom: 40px; }
    .srv {
        grid-template-columns: 1fr !important;
        gap: 16px;
        margin-bottom: 64px;
        padding: 0 !important;
    }
    .srv:nth-child(even) .srv-img { order: 0; }
    .srv-img { aspect-ratio: 16 / 10; }
    .srv-body { padding: 8px 0 0; }
    .srv-num { font-size: 11px; }
    .srv-body h3 { font-size: clamp(40px, 12vw, 72px); margin: 4px 0 12px; }
    .srv-body .srv-tag { font-size: clamp(16px, 4.5vw, 20px); margin-bottom: 8px; }
    .srv-body .srv-desc { font-size: 15px; }

    /* About */
    .about { padding: 72px 16px; }
    .about-text { padding-left: 0; }
    .about h2 { font-size: clamp(36px, 12vw, 64px); margin-bottom: 20px; }
    .about p { font-size: clamp(16px, 4.5vw, 20px); max-width: none; }
    .about .about-meta { font-size: 10px; margin-top: 20px; }

    /* Contact — mail en pleine largeur, plus compact */
    .contact { padding: 96px 16px; }
    .contact-label { font-size: 10px; margin-bottom: 20px; }
    .contact-mail { font-size: clamp(26px, 7.5vw, 44px); }
    .contact-note { font-size: 10px; margin-top: 20px; }

    /* Footer */
    footer { padding: 28px 16px; flex-direction: column; gap: 18px; align-items: flex-start; font-size: 10px; }
    .foot-right { text-align: left; }
}

/* ── Très petits écrans (≤380px) ─────────────────────────────────── */
@media (max-width: 380px) {
    .hero-text { font-size: clamp(40px, 14vw, 72px); }
    .avatar-slot { min-height: 320px; }
    #hdr nav { gap: 10px; }
}

/* ── Reduced motion ──────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
}