@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root{
  --bg: #0d2135;
  --bg-deep: #0a1a2b;
  --grid: #17324c;
  --grid-strong: #204268;
  --paper: #eaf1f7;
  --paper-dim: #a9c0d4;
  --muted: #5d7f9c;
  --accent: #f7931a;
  --eth: #6f8ff0;
  --ok: #3ecf6a;
  --err: #e6543c;
}

*{ box-sizing: border-box; }

html, body{
  margin:0;
  padding:0;
  min-height:100vh;
  background: var(--bg);
  color: var(--paper);
  font-family: 'Space Grotesk', sans-serif;
}

a{ color: inherit; }

.page{
  position:relative;
  min-height:100vh;
  padding: 4vw 5vw 5vw;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    linear-gradient(var(--grid-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-strong) 1px, transparent 1px);
  background-size: 24px 24px, 24px 24px, 120px 120px, 120px 120px;
  background-position: -1px -1px;
}

.page::before{
  content:"";
  position:absolute;
  inset: 28px;
  border: 1px solid var(--grid-strong);
  pointer-events:none;
}

.crop{ position:absolute; width: 22px; height: 22px; border: 1px solid var(--paper-dim); opacity:.55; }
.crop.tl{ top:14px; left:14px; border-right:none; border-bottom:none; }
.crop.tr{ top:14px; right:14px; border-left:none; border-bottom:none; }
.crop.bl{ bottom:14px; left:14px; border-right:none; border-top:none; }
.crop.br{ bottom:14px; right:14px; border-left:none; border-top:none; }

/* --- entête / navigation --- */
.site-header{
  position:relative;
  z-index:3;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:24px;
  flex-wrap:wrap;
  padding-bottom: 28px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--grid-strong);
}
.site-logo{
  display:flex;
  align-items:baseline;
  gap:10px;
  text-decoration:none;
  font-weight:600;
  font-size:19px;
  letter-spacing:-0.01em;
  color: var(--paper);
}
.site-logo .glyph{ color: var(--accent); font-size:22px; }
.site-nav{
  display:flex;
  gap: 28px;
  font-family:'JetBrains Mono', monospace;
  font-size: 12.5px;
  letter-spacing: .02em;
}
.site-nav a{ text-decoration:none; color: var(--paper-dim); border-bottom:1px solid transparent; padding-bottom:3px; }
.site-nav a:hover{ color: var(--paper); border-bottom-color: var(--grid-strong); }

/* --- contenu principal --- */
.content{ position:relative; z-index:2; max-width: 1120px; margin: 0 auto; }

/* --- pied de page --- */
.site-footer{
  position:relative;
  z-index:2;
  margin-top: 70px;
  padding-top: 28px;
  border-top: 1px solid var(--grid-strong);
  display:grid;
  grid-template-columns: 1fr auto;
  align-items:end;
  gap: 24px;
  max-width: 1120px;
  margin-left:auto;
  margin-right:auto;
}
.site-footer .note{ max-width: 420px; font-size: 13px; line-height: 1.6; color: var(--paper-dim); }
.titleblock{
  font-family:'JetBrains Mono', monospace;
  font-size: 11px;
  border: 1px solid var(--grid-strong);
  min-width: 260px;
}
.titleblock .row{ display:flex; justify-content:space-between; gap: 16px; padding: 7px 10px; border-top: 1px solid var(--grid-strong); }
.titleblock .row:first-child{ border-top:none; }
.titleblock .k{ color: var(--muted); }
.titleblock .v{ color: var(--paper); text-align:right; }
.titleblock .v.accent{ color: var(--accent); }

@media (max-width: 640px){
  .site-footer{ grid-template-columns: 1fr; }
  .titleblock{ min-width: 0; }
}

/* --- panneau cours BTC (repris de la page d'accueil d'origine) --- */
.market{ position:relative; z-index:2; border: 1px solid var(--grid-strong); padding: 20px 22px 14px; margin: 0 0 56px; }
.market-head{ display:flex; justify-content:space-between; align-items:flex-end; flex-wrap:wrap; gap: 18px; margin-bottom: 18px; }
.market-label{ font-family:'JetBrains Mono', monospace; font-size: 11px; letter-spacing:.06em; color: var(--muted); margin-bottom:6px; }
.price-block{ display:flex; align-items:baseline; gap:8px; }
.price-value{ font-size: 40px; font-weight:600; letter-spacing:-0.01em; font-variant-numeric: tabular-nums; }
.price-currency{ font-family:'JetBrains Mono', monospace; font-size: 13px; color: var(--muted); }
.price-change{ display:flex; align-items:center; gap:6px; margin-top:4px; font-family:'JetBrains Mono', monospace; font-size:13px; }
.price-change .arrow{ width:0; height:0; border-left:4px solid transparent; border-right:4px solid transparent; }
.price-change.up{ color: var(--ok); } .price-change.up .arrow{ border-bottom:6px solid var(--ok); }
.price-change.down{ color: var(--err); } .price-change.down .arrow{ border-top:6px solid var(--err); }
.tabs{ display:flex; gap:6px; }
.tab{ font-family:'JetBrains Mono', monospace; font-size:11px; letter-spacing:.04em; background:transparent; border:1px solid var(--grid-strong); color:var(--paper-dim); padding:7px 12px; cursor:pointer; }
.tab.active{ color: var(--paper); border-color: var(--paper-dim); }
.chart-wrap{ width:100%; }
.chart-wrap svg{ width:100%; height:150px; display:block; }
.chart-grid line{ stroke: var(--grid); stroke-width:1; }
.chart-sep{ stroke: var(--grid-strong); stroke-width:1; stroke-dasharray:3 3; }
.chart-fill{ fill:url(#chartGradient); }
.chart-line{ fill:none; stroke: var(--paper); stroke-width:1.6; }
.trend-warn{ margin-top:10px; font-size:12px; color: var(--paper-dim); line-height:1.6; padding:10px 12px; border:1px dashed var(--grid-strong); }
.trend-warn .flag{ color: var(--accent); font-family:'JetBrains Mono', monospace; font-weight:500; }
.trend-warn .up{ color: var(--ok); } .trend-warn .down{ color: var(--err); }
.market-foot{ display:flex; justify-content:space-between; font-family:'JetBrains Mono', monospace; font-size:11px; color: var(--muted); margin-top:12px; }

/* --- hero page d'accueil --- */
.hero{ position:relative; z-index:2; padding: 10px 0 56px; max-width:760px; }
.hero .eyebrow{ font-family:'JetBrains Mono', monospace; font-size:12px; color: var(--muted); letter-spacing:.04em; margin-bottom:14px; }
.hero h1{ margin:0 0 18px; font-size: clamp(30px, 4vw, 44px); font-weight:600; line-height:1.15; letter-spacing:-0.01em; }
.hero p.lead{ font-size:16px; line-height:1.65; color: var(--paper-dim); margin:0; max-width: 62ch; }

/* --- sections d'index d'articles --- */
.section-head{ display:flex; align-items:baseline; justify-content:space-between; gap:16px; margin: 0 0 26px; padding-bottom:14px; border-bottom:1px solid var(--grid-strong); }
.section-head h2{ margin:0; font-size: 24px; font-weight:600; letter-spacing:-0.01em; }
.section-head h2 .coin{ color: var(--accent); }
.section-head h2 .coin.eth{ color: var(--eth); }
.section-head .count{ font-family:'JetBrains Mono', monospace; font-size:12px; color: var(--muted); }

.article-grid{ display:grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--grid-strong); border:1px solid var(--grid-strong); margin-bottom: 60px; }
.article-card{ background: var(--bg); padding: 22px 24px; text-decoration:none; color:inherit; display:flex; flex-direction:column; gap:10px; transition: background-color .15s ease; }
.article-card:hover{ background: var(--bg-deep); }
.article-card .meta{ font-family:'JetBrains Mono', monospace; font-size:11px; color: var(--muted); letter-spacing:.02em; }
.article-card h3{ margin:0; font-size:17px; font-weight:600; line-height:1.35; letter-spacing:-0.005em; }
.article-card p{ margin:0; font-size:13.5px; line-height:1.55; color: var(--paper-dim); }
.article-card .readmore{ margin-top:auto; padding-top:10px; font-family:'JetBrains Mono', monospace; font-size:11.5px; color: var(--accent); }
.article-card.eth .readmore{ color: var(--eth); }

@media (max-width: 780px){
  .article-grid{ grid-template-columns: 1fr; }
}

/* --- page article --- */
.article-head{ position:relative; z-index:2; max-width: 760px; margin: 0 auto 40px; }
.article-head .breadcrumb{ font-family:'JetBrains Mono', monospace; font-size:11.5px; color: var(--muted); margin-bottom:18px; }
.article-head .breadcrumb a{ text-decoration:none; color: var(--muted); }
.article-head .breadcrumb a:hover{ color: var(--paper-dim); }
.article-head .cat-tag{ display:inline-block; font-family:'JetBrains Mono', monospace; font-size:11px; letter-spacing:.04em; padding:4px 9px; border:1px solid var(--grid-strong); color: var(--accent); margin-bottom:16px; }
.article-head .cat-tag.eth{ color: var(--eth); }
.article-head h1{ margin:0 0 16px; font-size: clamp(26px, 3.4vw, 38px); font-weight:600; line-height:1.2; letter-spacing:-0.01em; }
.article-head .subinfo{ font-family:'JetBrains Mono', monospace; font-size:12px; color: var(--muted); }

.prose{ position:relative; z-index:2; max-width: 700px; margin: 0 auto 50px; font-size:16px; line-height:1.75; color: var(--paper-dim); }
.prose h2{ color: var(--paper); font-size:22px; font-weight:600; letter-spacing:-0.005em; margin: 42px 0 16px; }
.prose h2:first-child{ margin-top:0; }
.prose p{ margin: 0 0 20px; }
.prose ul, .prose ol{ margin:0 0 20px; padding-left: 22px; }
.prose li{ margin-bottom:8px; }
.prose strong{ color: var(--paper); font-weight:600; }
.prose .callout{ border:1px solid var(--grid-strong); border-left:3px solid var(--accent); padding: 14px 18px; font-size:14.5px; margin: 28px 0; background: rgba(247,147,26,0.04); }
.prose .callout.eth{ border-left-color: var(--eth); background: rgba(111,143,240,0.05); }

.related{ position:relative; z-index:2; max-width:700px; margin: 0 auto 60px; padding-top:30px; border-top:1px solid var(--grid-strong); }
.related h3{ font-family:'JetBrains Mono', monospace; font-size:12px; letter-spacing:.04em; color: var(--muted); margin:0 0 16px; }
.related-links{ display:flex; flex-direction:column; gap:10px; }
.related-links a{ text-decoration:none; color: var(--paper); font-size:14.5px; padding:10px 14px; border:1px solid var(--grid-strong); display:block; }
.related-links a:hover{ border-color: var(--paper-dim); }
.related-links a .cat{ color: var(--muted); font-family:'JetBrains Mono', monospace; font-size:11px; margin-right:8px; }