/* SCICS — feuille de style principale */

@font-face {
    font-family: "Atkinson Hyperlegible Next";
    src: url("../fonts/atkinson-next-latin.woff2") format("woff2");
    font-weight: 200 800;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: "JetBrains Mono";
    src: url("../fonts/jetbrains-mono-latin.woff2") format("woff2");
    font-weight: 400 500;
    font-style: normal;
    font-display: swap;
}

:root {
    --ink: #1c1d1f;
    --ink-2: color-mix(in srgb, var(--ink) 62%, transparent);
    --line: color-mix(in srgb, var(--ink) 12%, transparent);
    --paper: #ffffff;
    --muted: #f5f6f7;
    --accent: #0b6e8a;
    --accent-soft: #dff2f7;
    --night: #0d1b24;

    --font: "Atkinson Hyperlegible Next", system-ui, -apple-system, "Segoe UI", sans-serif;
    --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

    --fs-h1: clamp(2.4rem, 1.6rem + 3.6vw, 4.6rem);
    --fs-h2: clamp(1.8rem, 1.4rem + 1.8vw, 2.9rem);
    --fs-h3: clamp(1.2rem, 1.1rem + 0.4vw, 1.45rem);
    --fs-body: clamp(1rem, 0.96rem + 0.2vw, 1.1rem);

    --container: 1180px;
    --gutter: clamp(16px, 4vw, 40px);
    --radius: 20px;
    --pill: 999px;
    --section-y: clamp(72px, 10vw, 140px);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 100px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font);
    font-size: var(--fs-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { margin: 0; line-height: 1.08; letter-spacing: -0.025em; font-weight: 800; }
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); letter-spacing: -0.01em; font-weight: 700; }
p { margin: 0; }
a { color: inherit; }
img { max-width: 100%; display: block; }

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

.visually-hidden {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip {
    position: absolute; left: 16px; top: -60px; z-index: 100;
    background: var(--ink); color: var(--paper); padding: 10px 16px; border-radius: var(--pill);
}
.skip:focus { top: 16px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.eyebrow {
    font-family: var(--mono);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 18px;
}
.eyebrow-light { color: #8fd3e6; }

/* --- Boutons ------------------------------------------------------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 14px 26px;
    border-radius: var(--pill);
    border: 1px solid transparent;
    font: inherit; font-size: 0.82rem; font-weight: 700;
    letter-spacing: 0.08em; text-transform: uppercase;
    text-decoration: none; white-space: nowrap;
    cursor: pointer;
    transition: background-color .2s, color .2s, border-color .2s, transform .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-sm { padding: 10px 20px; font-size: 0.74rem; }
.btn-dark { background: var(--ink); color: var(--paper); }
.btn-dark:hover { background: var(--accent); }
.btn-accent { background: var(--accent); color: var(--paper); }
.btn-accent:hover { background: var(--ink); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: var(--paper); }
.btn-ghost:hover { border-color: var(--ink); }
.btn-light { background: var(--paper); color: var(--night); text-transform: none; letter-spacing: 0; font-size: 1rem; }
.btn-light:hover { background: var(--accent-soft); }

/* --- Header -------------------------------------------------------- */
.site-header {
    position: sticky; top: 0; z-index: 50;
    padding: 16px var(--gutter);
}
.nav {
    max-width: var(--container);
    margin-inline: auto;
    display: flex; align-items: center; justify-content: space-between; gap: 24px;
    padding: 10px 10px 10px 24px;
    background: color-mix(in srgb, var(--paper) 86%, transparent);
    backdrop-filter: saturate(160%) blur(14px);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    border: 1px solid var(--line);
    border-radius: var(--pill);
    transition: box-shadow .25s;
}
.site-header.is-scrolled .nav { box-shadow: 0 12px 30px rgba(13, 27, 36, 0.07); }

.brand { display: inline-flex; align-items: center; }
.brand img { height: 26px; width: auto; }

.nav-menu { display: flex; align-items: center; gap: 28px; }
.nav-links { display: flex; gap: 28px; list-style: none; margin: 0; padding: 0; }
.nav-links a { text-decoration: none; font-size: 0.95rem; color: var(--ink-2); transition: color .2s; }
.nav-links a:hover { color: var(--ink); }

.nav-toggle {
    display: none;
    width: 44px; height: 44px; border-radius: 50%;
    border: 1px solid var(--line); background: var(--paper);
    cursor: pointer; position: relative;
}
.nav-toggle-bar, .nav-toggle-bar::before, .nav-toggle-bar::after {
    position: absolute; left: 50%; width: 18px; height: 2px; margin-left: -9px;
    background: var(--ink); border-radius: 2px; transition: transform .2s, opacity .2s;
}
.nav-toggle-bar { top: 50%; margin-top: -1px; }
.nav-toggle-bar::before, .nav-toggle-bar::after { content: ""; left: 0; margin-left: 0; }
.nav-toggle-bar::before { top: -6px; }
.nav-toggle-bar::after { top: 6px; }
.nav.is-open .nav-toggle-bar { background: transparent; }
.nav.is-open .nav-toggle-bar::before { transform: translateY(6px) rotate(45deg); }
.nav.is-open .nav-toggle-bar::after { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 760px) {
    .nav { flex-wrap: wrap; border-radius: 26px; padding: 8px 8px 8px 20px; }
    .nav-toggle { display: block; }
    .nav-menu {
        display: none; width: 100%;
        flex-direction: column; align-items: stretch; gap: 8px;
        padding: 8px 12px 14px 0;
    }
    .nav.is-open .nav-menu { display: flex; }
    .nav-links { flex-direction: column; gap: 0; }
    .nav-links a { display: block; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 1.05rem; color: var(--ink); }
    .nav-menu .btn { margin-top: 8px; }
}

/* --- Hero ---------------------------------------------------------- */
.hero {
    position: relative;
    isolation: isolate;
    margin-top: -86px;               /* passe sous le header flottant */
    padding: calc(86px + clamp(72px, 12vw, 160px)) 0 clamp(72px, 10vw, 130px);
    overflow: hidden;
}
.hero-small { padding-bottom: clamp(60px, 8vw, 100px); }
.hero-grid {
    position: absolute; inset: 0; z-index: -1;
    background-image:
        linear-gradient(var(--line) 1px, transparent 1px),
        linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 64px 64px;
    background-position: center top;
    -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 75%);
            mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 75%);
}
.hero-grid::after {
    content: "";
    position: absolute; width: 520px; height: 520px; right: 8%; top: 10%;
    background: radial-gradient(circle, var(--accent-soft) 0%, transparent 65%);
    filter: blur(10px);
}
.hero-inner { max-width: 940px; text-align: center; }
.hero-sub {
    max-width: 620px; margin: 28px auto 0;
    font-size: clamp(1.05rem, 1rem + 0.35vw, 1.25rem);
    color: var(--ink-2);
}
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 40px; }

/* --- Sections ------------------------------------------------------ */
.section { padding: var(--section-y) 0; }
.section-muted { background: var(--muted); }
.section-head { max-width: 640px; margin-bottom: clamp(40px, 6vw, 72px); }

/* Cartes expertises */
.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
}
.card {
    padding: clamp(28px, 3vw, 44px);
    background: var(--paper);
    transition: background-color .25s;
}
.card + .card { border-left: 1px solid var(--line); }
.card:hover { background: var(--muted); }
.card-num {
    display: inline-block;
    font-family: var(--mono); font-size: 0.78rem; color: var(--accent);
    padding: 4px 10px; border-radius: var(--pill);
    background: var(--accent-soft);
    margin-bottom: 28px;
}
.card-lead { margin-top: 12px; color: var(--ink-2); }
.card-list { list-style: none; margin: 28px 0 0; padding: 0; }
.card-list li {
    position: relative;
    padding: 12px 0 12px 22px;
    border-top: 1px solid var(--line);
    font-size: 0.97rem;
}
.card-list li::before {
    content: ""; position: absolute; left: 0; top: 1.25em;
    width: 8px; height: 2px; background: var(--accent);
}

@media (max-width: 900px) {
    .cards { grid-template-columns: 1fr; }
    .card + .card { border-left: 0; border-top: 1px solid var(--line); }
}

/* Étapes */
.steps {
    list-style: none; margin: 0; padding: 0;
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.step {
    padding: 28px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}
.step-num {
    display: block; font-family: var(--mono); font-size: 0.85rem; color: var(--accent);
    padding-bottom: 20px; margin-bottom: 20px;
    border-bottom: 1px dashed var(--line);
}
.step p { margin-top: 10px; color: var(--ink-2); font-size: 0.97rem; }

@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }

/* Bloc contact */
.cta {
    position: relative; overflow: hidden;
    display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap;
    padding: clamp(36px, 6vw, 72px);
    border-radius: calc(var(--radius) + 8px);
    background: var(--night);
    color: var(--paper);
}
.cta::before {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background-image:
        linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
    background-size: 48px 48px;
    -webkit-mask-image: linear-gradient(90deg, transparent 30%, #000);
            mask-image: linear-gradient(90deg, transparent 30%, #000);
}
.cta > * { position: relative; }
.cta p:not(.eyebrow) { margin-top: 14px; color: rgba(255,255,255,.7); }
.cta .btn { white-space: normal; word-break: break-all; }

/* --- Footer -------------------------------------------------------- */
.site-footer { border-top: 1px solid var(--line); padding-top: 56px; font-size: 0.95rem; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; }
.footer-logo img { width: 170px; height: auto; }
.footer-brand p { margin-top: 16px; color: var(--ink-2); max-width: 300px; }
.footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-links a { color: var(--ink-2); text-decoration: none; }
.footer-links a:hover { color: var(--ink); }
.footer-bottom {
    margin-top: 48px; padding-top: 20px; padding-bottom: 28px;
    border-top: 1px solid var(--line);
    color: var(--ink-2); font-size: 0.85rem;
    display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px;
}
.footer-bottom a { color: inherit; }
.footer-bottom a:hover { color: var(--ink); }
@media (max-width: 760px) { .footer-inner { grid-template-columns: 1fr; } }

/* --- Pages de contenu (mentions légales…) -------------------------- */
.prose { max-width: 760px; }
.prose h2 {
    font-size: var(--fs-h3); letter-spacing: -0.01em;
    margin: 56px 0 16px; padding-top: 24px; border-top: 1px solid var(--line);
}
.prose h2:first-child { margin-top: 0; }
.prose p, .prose ul { margin: 0 0 14px; color: var(--ink-2); }
.prose ul { padding-left: 20px; }
.prose a { color: var(--accent); }
.prose dl { display: grid; grid-template-columns: 230px 1fr; gap: 10px 28px; margin: 0; }
.prose dt { font-family: var(--mono); font-size: 0.8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-2); padding-top: 3px; }
.prose dd { margin: 0; }
@media (max-width: 560px) {
    .prose dl { grid-template-columns: 1fr; gap: 2px; }
    .prose dd { margin-bottom: 12px; }
}