/* Cap Numérique — feuille de style commune */

:root {
  --bg: #0a0c11;
  --bg-alt: #12151d;
  --bg-card: #161a24;
  --border: rgba(255, 255, 255, 0.09);
  --text: #eae7df;
  --text-dim: #9aa0ac;
  --text-faint: #6b7280;
  --accent: #d9a34a;
  --accent-soft: rgba(217, 163, 74, 0.14);
  --accent-strong: #f0bd6c;
  --error-bg: rgba(217, 90, 74, 0.12);
  --error-border: rgba(217, 90, 74, 0.4);
  --ok-bg: rgba(122, 176, 122, 0.12);
  --ok-border: rgba(122, 176, 122, 0.4);
  --radius: 14px;
  --serif: "Fraunces", Georgia, "Iowan Old Style", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max-w: 980px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: radial-gradient(ellipse at 80% 0%, rgba(217,163,74,0.07), transparent 55%), var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-strong); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 0.5em;
  color: #fff;
}

h1 { font-size: clamp(2rem, 4vw, 2.9rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: 2.6em; }
h3 { font-size: 1.3rem; margin-top: 1.8em; color: var(--accent-strong); }

p { margin: 0 0 1em; color: var(--text); }

.eyebrow {
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
}

.lede { color: var(--text-dim); font-size: 1.08rem; max-width: 62ch; }

/* Nav */
.topnav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.5rem;
  background: rgba(10, 12, 17, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.topnav .brand {
  font-family: var(--serif);
  font-size: 1.05rem;
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.topnav .brand span { color: var(--accent); }

.topnav nav {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
}

.topnav nav a {
  color: var(--text-dim);
  font-size: 0.86rem;
  font-weight: 500;
  white-space: nowrap;
}
.topnav nav a:hover, .topnav nav a.active { color: var(--accent-strong); text-decoration: none; }

/* Layout wrappers */
.page {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem 6rem;
}
.page-narrow { max-width: 760px; }
.page-wide { max-width: 1180px; }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem 1.8rem;
  margin: 1.4rem 0;
}

.callout {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 10px 10px 0;
  padding: 1rem 1.3rem;
  margin: 1.2rem 0;
}
.callout strong { color: var(--accent-strong); }

.callout-error {
  border-left: 3px solid #d95a4a;
  background: var(--error-bg);
  border-radius: 0 10px 10px 0;
  padding: 1rem 1.3rem;
  margin: 1.2rem 0;
}

.callout-ok {
  border-left: 3px solid #7ab07a;
  background: var(--ok-bg);
  border-radius: 0 10px 10px 0;
  padding: 1rem 1.3rem;
  margin: 1.2rem 0;
}

/* Tags */
.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(217,163,74,0.3);
  border-radius: 999px;
  padding: 0.22rem 0.7rem;
  margin: 0 0.4rem 0.4rem 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent);
  color: #1a1206;
  font-weight: 700;
  font-size: 0.92rem;
  padding: 0.7rem 1.3rem;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { background: var(--accent-strong); text-decoration: none; }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-strong); }

/* Tables */
table { width: 100%; border-collapse: collapse; margin: 1.4rem 0; font-size: 0.94rem; }
th, td { text-align: left; padding: 0.7rem 0.8rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--accent); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; }
tr:hover td { background: rgba(255,255,255,0.02); }

/* Q&A recall boxes */
.recall {
  background: var(--bg-alt);
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 1rem 1.2rem;
  margin: 0.6rem 0;
}
.recall summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent-strong);
  list-style: none;
}
.recall summary::-webkit-details-marker { display: none; }
.recall summary::before { content: "▸ "; color: var(--accent); }
.recall[open] summary::before { content: "▾ "; }
.recall .answer { margin-top: 0.7rem; padding-top: 0.7rem; border-top: 1px solid var(--border); color: var(--text-dim); }

/* Chapter nav dots */
.chapters-index {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.8rem;
  margin: 1.6rem 0 2.4rem;
}
.chapters-index a {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem 1.1rem;
  color: var(--text);
}
.chapters-index a:hover { border-color: var(--accent); text-decoration: none; }
.chapters-index .num { color: var(--accent); font-size: 0.75rem; font-weight: 700; }

/* Revision badge */
.revise {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--text-faint);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
  margin-top: 0.4rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.4rem 1.5rem;
  text-align: center;
  color: var(--text-faint);
  font-size: 0.85rem;
}

/* Print */
@media print {
  .topnav, .site-footer, .no-print { display: none !important; }
  body { background: #fff; color: #111; }
  h1, h2, h3, h4 { color: #111; }
  .card, .callout, .callout-error, .callout-ok { border-color: #ccc; background: #f7f7f7; }
}

/* Mindmap */
.mindmap {
  position: relative;
  height: 640px;
  margin: 2.5rem auto 1rem;
  max-width: 900px;
}
.mindmap-lines { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.mm-line { fill: none; stroke: rgba(217, 163, 74, 0.28); stroke-width: 1.4; transition: stroke 0.25s, stroke-width 0.25s; }
.mm-line.is-hover { stroke: var(--accent-strong); stroke-width: 2; }
.mm-line.is-active { stroke: var(--accent); stroke-width: 2.2; }

.mindmap-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 230px;
  text-align: center;
  padding: 1.4rem;
  border-radius: 999px;
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 30%, rgba(217,163,74,0.16), var(--bg-card) 70%);
  border: 1px solid rgba(217, 163, 74, 0.35);
  box-shadow: 0 0 0 1px rgba(217,163,74,0.08), 0 20px 60px rgba(0,0,0,0.5);
}
.mindmap-center .eyebrow { margin-bottom: 0.3rem; }
.mindmap-center h2 { font-size: 1.15rem; margin: 0; line-height: 1.3; }
.mindmap-center p { font-size: 0.78rem; color: var(--text-faint); margin: 0.5rem 0 0; }

.mindmap-node {
  position: absolute;
  transform: translate(-50%, -50%);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: var(--sans);
  text-align: left;
}
.mm-node-inner {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.6rem 1rem;
  min-width: 148px;
  max-width: 190px;
  transition: transform 0.25s cubic-bezier(.16,.84,.44,1), box-shadow 0.25s, border-color 0.25s, background 0.25s;
}
.mindmap-node:hover .mm-node-inner,
.mindmap-node:focus-visible .mm-node-inner {
  transform: scale(1.08) translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(217,163,74,0.3), 0 10px 28px rgba(217,163,74,0.16);
}
.mindmap-node.is-active .mm-node-inner {
  background: var(--accent-soft);
  border-color: var(--accent);
}
.mm-node-num { font-size: 0.68rem; color: var(--accent); font-weight: 700; letter-spacing: 0.05em; }
.mm-node-label { font-size: 0.86rem; font-weight: 600; color: #fff; line-height: 1.25; }

.mindmap-detail {
  display: none;
  max-width: 620px;
  margin: 1rem auto 0;
  background: var(--bg-card);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.6rem 1.8rem;
  position: relative;
}
.mindmap-detail.is-open { display: block; animation: mmIn 0.3s cubic-bezier(.16,.84,.44,1); }
@keyframes mmIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.mm-detail-close {
  position: absolute;
  top: 1rem; right: 1.1rem;
  background: none; border: none; color: var(--text-faint);
  font-size: 1.1rem; cursor: pointer; line-height: 1;
}
.mm-detail-close:hover { color: var(--accent-strong); }
.mm-detail-title { margin: 0.2rem 0 0.6rem; }
.mm-detail-action { font-size: 0.92rem; }
.mm-detail-link { margin-top: 0.6rem; }

@media (max-width: 680px) {
  .mindmap { height: auto; }
  .mindmap-lines { display: none; }
  .mindmap-center {
    position: static;
    transform: none;
    width: 100%;
    aspect-ratio: auto;
    border-radius: var(--radius);
    margin: 0 auto 1.4rem;
  }
  .mindmap-node {
    position: static;
    transform: none;
    display: block;
    margin: 0 0 0.7rem;
  }
  .mm-node-inner { max-width: none; }
  .mindmap-node:hover .mm-node-inner { transform: translateX(4px); }
}

/* Utility */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; }
@media (max-width: 720px) { .grid-2 { grid-template-columns: 1fr; } }
.small { font-size: 0.85rem; color: var(--text-dim); }
.center { text-align: center; }
.mt-0 { margin-top: 0; }