:root {
  --bg: #0A0A0A;
  --surface: rgba(255,255,255,0.04);
  --border: rgba(255,255,255,0.1);
  --text: #FAFAFA;
  --text-muted: rgba(255,255,255,0.65);
  --accent: #10B981;
  --accent-2: #34D399;
  --font-display: 'Bricolage Grotesque', system-ui, sans-serif;
  --font-body: 'Manrope', system-ui, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  padding: 0 20px;
}
.doc-header {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  border-bottom: 1px solid var(--border);
}
.doc-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
}
.doc-logo svg { width: 36px; height: 36px; }
.doc-logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}
.doc-logo-text .accent { color: var(--accent); }
.back-link {
  color: var(--accent-2);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  transition: background 0.2s;
}
.back-link:hover { background: rgba(16,185,129,0.1); }

.doc-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 0 80px;
}
.doc-content h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
  line-height: 1.1;
}
.doc-meta {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 32px;
}
.doc-content h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 32px 0 12px;
  color: var(--accent-2);
}
.doc-content p {
  margin-bottom: 16px;
  color: var(--text-muted);
}
.doc-content ul, .doc-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
  color: var(--text-muted);
}
.doc-content li { margin-bottom: 8px; }

.doc-placeholder {
  padding: 32px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: 16px;
  margin: 24px 0;
}
.doc-placeholder h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: var(--accent-2);
}
.doc-placeholder p {
  color: var(--text);
}

.doc-footer {
  max-width: 800px;
  margin: 0 auto;
  padding: 32px 0;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}
.doc-footer a { color: var(--accent-2); text-decoration: none; }

/* Tabs */
.tabs-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 20px 0 28px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.tab-btn {
  flex: 0 0 auto;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.tab-btn:hover { border-color: rgba(255,255,255,0.25); }
.tab-btn.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #002417;
  border-color: transparent;
}
.tab-pane { display: none; }
.tab-pane.active { display: block; animation: tabFade 0.25s ease; }
@keyframes tabFade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }