:root {
  --bg: #fafaf7;
  --surface: #ffffff;
  --text: #141413;
  --muted: #5d5d57;
  --line: #e3e3dc;
  --accent: #2448d8;
  --accent-soft: #e9edfc;
  --max: 1080px;
  --gutter: clamp(16px, 4vw, 32px);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111110;
    --surface: #1a1a18;
    --text: #f1f1ec;
    --muted: #a4a49b;
    --line: #2c2c29;
    --accent: #8ea4ff;
    --accent-soft: #1c2240;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1.0625rem/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  text-rendering: optimizeLegibility;
}
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--text); color: var(--bg); padding: 8px 12px; border-radius: 6px; z-index: 10; }
.skip:focus { left: 8px; }

/* En-tête */
.top { border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 68px; }
.brand { font-weight: 650; letter-spacing: -0.01em; text-decoration: none; display: inline-flex; align-items: center; gap: 10px; }
.brand-mark { width: 28px; height: 28px; border-radius: 7px; background: var(--text); color: var(--bg); display: grid; place-items: center; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.02em; }
.nav { display: flex; gap: clamp(14px, 3vw, 28px); font-size: 0.95rem; }
.nav a { text-decoration: none; color: var(--muted); }
.nav a:hover { color: var(--text); }
@media (max-width: 560px) { .nav .hide-sm { display: none; } }

/* Accueil */
.hero { padding: clamp(56px, 11vw, 120px) 0 clamp(48px, 8vw, 88px); }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: clamp(32px, 6vw, 72px); align-items: center; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } }
.eyebrow { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); margin: 0 0 20px; }
h1 { font-size: clamp(2.3rem, 6vw, 4.1rem); line-height: 1.05; letter-spacing: -0.035em; font-weight: 650; margin: 0 0 24px; }
h1 em { font-style: normal; color: var(--accent); }
.lead { font-size: clamp(1.08rem, 1.6vw, 1.2rem); color: var(--muted); max-width: 34em; margin: 0 0 32px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 20px; border-radius: 999px; text-decoration: none; font-weight: 550; font-size: 0.98rem; border: 1px solid var(--text); }
.btn-primary { background: var(--text); color: var(--bg); }
.btn-primary:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-ghost:hover { background: var(--surface); }

/* Illustration : une page de résultats épurée */
.serp { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 20px; box-shadow: 0 1px 0 var(--line), 0 24px 48px -32px rgba(20, 20, 19, 0.25); }
.serp-bar { display: flex; align-items: center; gap: 10px; border: 1px solid var(--line); border-radius: 999px; padding: 10px 16px; font-size: 0.92rem; color: var(--muted); margin-bottom: 18px; }
.serp-bar svg { flex: none; }
.serp-result { padding: 12px 12px; border-radius: 10px; }
.serp-result + .serp-result { margin-top: 4px; }
.serp-result .url { font-size: 0.78rem; color: var(--muted); }
.serp-result .title { font-weight: 600; font-size: 0.98rem; line-height: 1.35; margin: 2px 0 6px; }
.serp-result .bar { height: 7px; border-radius: 4px; background: var(--line); width: 92%; }
.serp-result .bar.short { width: 64%; margin-top: 6px; }
.serp-result.is-you { background: var(--accent-soft); }
.serp-result.is-you .title { color: var(--accent); }
.serp-result .stars { color: #e3a008; font-size: 0.82rem; letter-spacing: 1px; margin-top: 6px; }
.serp-result .stars span { color: var(--muted); letter-spacing: 0; margin-left: 6px; }
.serp-result.dim { opacity: 0.55; }

/* Sections */
section { padding: clamp(56px, 9vw, 104px) 0; border-top: 1px solid var(--line); }
.section-head { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 32px; margin-bottom: clamp(32px, 5vw, 56px); }
@media (max-width: 760px) { .section-head { grid-template-columns: 1fr; gap: 12px; } }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); line-height: 1.12; letter-spacing: -0.025em; font-weight: 650; margin: 0; }
.section-head p { color: var(--muted); margin: 0; max-width: 36em; }

.services { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; }
@media (max-width: 860px) { .services { grid-template-columns: 1fr; } }
.service { background: var(--bg); padding: clamp(24px, 3.4vw, 36px); }
.num { font-size: 0.82rem; color: var(--accent); font-weight: 600; letter-spacing: 0.06em; }
h3 { font-size: 1.25rem; letter-spacing: -0.015em; font-weight: 620; margin: 14px 0 10px; line-height: 1.25; }
.service p { color: var(--muted); margin: 0 0 18px; }
.service ul { list-style: none; padding: 0; margin: 0; font-size: 0.95rem; }
.service li { padding: 9px 0; border-top: 1px solid var(--line); }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(20px, 3vw, 32px); counter-reset: step; list-style: none; padding: 0; margin: 0; }
@media (max-width: 860px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }
.steps li { counter-increment: step; border-top: 2px solid var(--text); padding-top: 18px; }
.steps li::before { content: counter(step, decimal-leading-zero); font-size: 0.82rem; color: var(--muted); font-weight: 600; letter-spacing: 0.06em; }
.steps h3 { margin-top: 10px; }
.steps p { color: var(--muted); margin: 0; font-size: 0.97rem; }

.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 40px); }
@media (max-width: 860px) { .principles { grid-template-columns: 1fr; } }
.principles p { color: var(--muted); margin: 0; }

.contact { text-align: left; }
.contact-box { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 32px; align-items: end; }
@media (max-width: 760px) { .contact-box { grid-template-columns: 1fr; } }
.mail { display: inline-block; font-size: clamp(1.35rem, 3.6vw, 2.2rem); font-weight: 600; letter-spacing: -0.02em; text-decoration: none; border-bottom: 2px solid var(--accent); padding-bottom: 4px; word-break: break-all; }
.mail:hover { color: var(--accent); }
.contact-note { color: var(--muted); margin: 0; }

/* Pied de page */
.foot { border-top: 1px solid var(--line); padding: 28px 0 40px; font-size: 0.9rem; color: var(--muted); }
.foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.foot a { color: var(--muted); }

/* Page de texte (mentions légales) */
.page { padding: clamp(48px, 8vw, 96px) 0; }
.page .wrap { max-width: 760px; }
.page h1 { font-size: clamp(2rem, 5vw, 3rem); }
.page h2 { font-size: 1.3rem; margin: 40px 0 10px; }
.page p, .page li { color: var(--muted); }
.page strong { color: var(--text); font-weight: 600; }
.todo { background: #fff4d6; color: #6b4e00; padding: 0 4px; border-radius: 3px; }
@media (prefers-color-scheme: dark) { .todo { background: #3a2f10; color: #f3d27a; } }