/* =========================================================
   site.css — styles sobres, légers et élégants (zordan.fr)
   ========================================================= */

/* --------- Design tokens --------- */
:root{
  --bg: #ffffff;
  --text: #0f172a;          /* slate-900 */
  --muted: #475569;         /* slate-600 */
  --line: #e2e8f0;          /* slate-200 */
  --card: #f8fafc;          /* slate-50 */
  --brand: #0ea5e9;         /* sky-500 */
  --brand-2: #7c3aed;       /* violet-600 */
  --shadow: 0 10px 30px rgba(2,6,23,.08);
}

@media (prefers-color-scheme: dark){
  :root{
    --bg:#0b1021;
    --text:#e5e7eb;         /* gray-200 */
    --muted:#94a3b8;        /* slate-400 */
    --line:#1f2937;         /* slate-800 */
    --card:#0f172a;         /* slate-900 */
    --shadow: 0 10px 30px rgba(0,0,0,.35);
  }
}

/* --------- Base --------- */
*{ box-sizing:border-box; }
html,body{ height:100%; }
html{ scroll-behavior:smooth; }

body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial, "Noto Sans";
  background:
    radial-gradient(1200px 600px at 70% -10%, rgba(124,58,237,.06), transparent),
    radial-gradient(900px 500px at -10% 20%, rgba(14,165,233,.08), transparent),
    var(--bg);
  color:var(--text);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

a{ color:var(--brand); text-decoration:none; }
a:hover{ text-decoration:underline; }
img{ max-width:100%; display:block; }

/* --------- Layout --------- */
.wrap{ width:min(920px, 92%); margin-inline:auto; }

header{
  position:sticky; top:0; z-index:20;
  backdrop-filter:saturate(160%) blur(8px);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  border-bottom:1px solid var(--line);
}

.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:.9rem 0;
}

.brand{
  display:flex; align-items:center; gap:.6rem;
  font-weight:800; letter-spacing:.2px;
}

.dot{
  width:10px; height:10px; border-radius:999px;
  background:linear-gradient(45deg,var(--brand),var(--brand-2));
}

.links{
  display:flex; gap:.9rem; flex-wrap:wrap;
}

.links a{
  color:inherit; padding:.45rem .7rem; border-radius:.6rem;
}
.links a:hover{
  background:var(--card); text-decoration:none;
}

main{ padding:2.5rem 0 3.5rem; }
section{ padding:2.25rem 0; }

h1{
  font-size:clamp(1.9rem, 3.8vw, 3rem);
  line-height:1.1; margin:0 0 .6rem;
}
h2{
  font-size:clamp(1.3rem, 2.2vw, 1.75rem);
  line-height:1.15; margin:0 0 .4rem;
}
p{ margin:.75rem 0; }

.kicker{
  color:var(--muted); font-weight:700; text-transform:uppercase;
  letter-spacing:.4px; font-size:.85rem;
}

.intro{
  display:grid; grid-template-columns: 1.05fr .95fr;
  gap:1.5rem; align-items:center;
}
@media (max-width:860px){ .intro{ grid-template-columns:1fr; } }

/* --------- Cards & figures --------- */
.card{
  background:var(--card); border:1px solid var(--line);
  border-radius:1rem; padding:1.1rem; box-shadow:var(--shadow);
}

.figure{
  aspect-ratio: 4/3; border:1px dashed var(--line);
  border-radius:1rem; display:grid; place-items:center;
  color:var(--muted); font-weight:600;
  background:linear-gradient(
    135deg,
    color-mix(in srgb, var(--brand) 18%, transparent),
    color-mix(in srgb, var(--brand-2) 14%, transparent)
  );
}

/* --------- Rules --------- */
hr{
  border:0; height:1px;
  background:linear-gradient(90deg, transparent, var(--line), transparent);
  margin:2rem 0;
}

/* --------- Utilities --------- */
.lede{ font-size:clamp(1rem, 1.5vw, 1.15rem); color:var(--muted); }
.block{ display:grid; gap:.5rem; }
.muted{ color:var(--muted); }
.row{ display:flex; gap:.6rem; flex-wrap:wrap; align-items:center; }

.btn{
  display:inline-flex; align-items:center; gap:.5rem;
  padding:.62rem .9rem; border-radius:.7rem;
  border:1px solid var(--line); background:var(--bg);
  color:inherit; font-weight:600; text-decoration:none;
}
.btn:hover{ background:var(--card); text-decoration:none; }
.btn.primary{
  background:linear-gradient(135deg, var(--brand), var(--brand-2));
  color:#fff; border:none;
}
.btn.ghost{ background:transparent; }

.cta-site{ font-weight:800; letter-spacing:.2px; }
.cta-wrap{ display:flex; gap:.6rem; flex-wrap:wrap; margin-top:.4rem; }

/* --------- Footer --------- */
footer{
  border-top:1px solid var(--line);
  padding:2rem 0 3rem; color:var(--muted);
  font-size:.95rem;
}
.foot{
  display:flex; justify-content:space-between;
  align-items:center; gap:1rem; flex-wrap:wrap;
}

/* --------- Accessibility: focus visible when keyboard nav --------- */
.show-focus :focus{
  outline: 3px solid color-mix(in srgb, var(--brand) 60%, var(--brand-2));
  outline-offset: 3px; border-radius:.4rem;
}