:root {
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-code: #12141c;
  --border: #2a2d3a;
  --text: #e4e4e7;
  --text-muted: #8b8d97;
  --accent: #60a5fa;
  --accent-hover: #93c5fd;
  --green: #4ade80;
  --yellow: #facc15;
  --red: #f87171;
  --orange: #fb923c;
  --purple: #a78bfa;
  --gold: #C9A96E;
  --navy: #1B2838;
  --sidebar-w: 260px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  padding: 24px 0;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  overflow-y: auto;
  z-index: 100;
}

.sidebar-logo {
  padding: 0 20px 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.sidebar-logo h1 {
  font-size: 18px;
  color: var(--gold);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.sidebar-logo span {
  font-size: 12px;
  color: var(--text-muted);
  display: block;
  margin-top: 4px;
}

.nav-section {
  padding: 12px 20px 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.15s;
  border-left: 3px solid transparent;
}

.nav-link:hover {
  background: rgba(96, 165, 250, 0.08);
  color: var(--text);
}

.nav-link.active {
  color: var(--accent);
  background: rgba(96, 165, 250, 0.1);
  border-left-color: var(--accent);
}

.nav-link .icon { font-size: 16px; width: 20px; text-align: center; }

/* Main content */
.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 32px 48px;
  max-width: 1000px;
}

h1 { font-size: 28px; font-weight: 700; margin-bottom: 8px; color: var(--text); }
h2 { font-size: 22px; font-weight: 600; margin: 40px 0 16px; color: var(--accent); border-bottom: 1px solid var(--border); padding-bottom: 8px; }
h3 { font-size: 17px; font-weight: 600; margin: 28px 0 12px; color: var(--text); }
h4 { font-size: 15px; font-weight: 600; margin: 20px 0 8px; color: var(--text-muted); }

p { margin-bottom: 14px; }

.subtitle {
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 32px;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  font-size: 14px;
}

th {
  background: var(--bg-card);
  text-align: left;
  padding: 10px 14px;
  border-bottom: 2px solid var(--border);
  font-weight: 600;
  color: var(--text-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}

tr:hover td { background: rgba(255,255,255,0.02); }

/* Code */
pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  margin: 12px 0 20px;
  font-size: 13px;
  line-height: 1.6;
}

code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 13px;
}

:not(pre) > code {
  background: var(--bg-code);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.badge-green { background: rgba(74,222,128,0.15); color: var(--green); }
.badge-yellow { background: rgba(250,204,21,0.15); color: var(--yellow); }
.badge-red { background: rgba(248,113,113,0.15); color: var(--red); }
.badge-blue { background: rgba(96,165,250,0.15); color: var(--accent); }
.badge-purple { background: rgba(167,139,250,0.15); color: var(--purple); }
.badge-orange { background: rgba(251,146,60,0.15); color: var(--orange); }

/* Phase progress */
.phase-list { list-style: none; }

.phase-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.phase-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  margin-top: 2px;
}

.phase-done { background: rgba(74,222,128,0.15); }
.phase-human { background: rgba(250,204,21,0.15); }
.phase-auto { background: rgba(96,165,250,0.15); }

/* Flow diagram */
.flow-diagram {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin: 16px 0 24px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre;
}

/* Spec section */
.spec-item {
  padding: 12px 16px;
  border-left: 3px solid var(--accent);
  margin-bottom: 12px;
  background: rgba(96,165,250,0.05);
  border-radius: 0 8px 8px 0;
}

.spec-item strong { color: var(--accent); }

/* Responsive */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .main { margin-left: 0; padding: 20px; }
  .card-grid { grid-template-columns: 1fr; }
}