/* FVT Bilgi Bankası — FVT-inspired dark theme */
:root {
  --bg-primary: #181A20;
  --bg-secondary: #1E2127;
  --bg-tertiary: #262932;
  --bg-card: #1F2229;
  --border: #2B2F38;
  --text-primary: #E4E6EB;
  --text-secondary: #9CA3AF;
  --text-muted: #6B7280;
  --accent: #4F46E5;
  --accent-hover: #6366F1;
  --success: #10B981;
  --danger: #EF4444;
  --warning: #F59E0B;
  --info: #3B82F6;
  --code-bg: #0F1115;
  --code-border: #3F4452;
  --font-sans: 'IBM Plex Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Fira Code', 'Consolas', monospace;
  --sidebar-width: 280px;
}

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

html, body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 15px;
}

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

/* Layout */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar h1 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
  background: linear-gradient(135deg, #4F46E5, #06B6D4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar .subtitle {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sidebar .nav-group {
  margin-bottom: 16px;
}

.sidebar .nav-group-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 8px 12px 4px;
  font-weight: 600;
}

.sidebar .nav-item {
  display: block;
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 14px;
  margin: 1px 0;
  transition: all 0.15s;
  text-decoration: none;
}

.sidebar .nav-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  text-decoration: none;
}

.sidebar .nav-item.active {
  background: var(--accent);
  color: white;
}

.sidebar .nav-item.active:hover {
  background: var(--accent-hover);
  color: white;
}

.sidebar .nav-icon {
  display: inline-block;
  width: 20px;
  text-align: center;
  margin-right: 6px;
}

.search-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  width: 100%;
  color: var(--text-primary);
  font-size: 13px;
  margin-bottom: 16px;
}

.search-box:focus {
  outline: none;
  border-color: var(--accent);
}

/* Main content */
.main {
  padding: 32px 48px;
  max-width: 1200px;
}

.main h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #06B6D4, #4F46E5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main h2 {
  font-size: 22px;
  font-weight: 600;
  margin-top: 40px;
  margin-bottom: 12px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.main h3 {
  font-size: 18px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 8px;
  color: #A5B4FC;
}

.main h4 {
  font-size: 16px;
  font-weight: 600;
  margin-top: 20px;
  margin-bottom: 6px;
  color: #93C5FD;
}

.main p { margin-bottom: 14px; color: var(--text-primary); }

.main ul, .main ol {
  margin-left: 24px;
  margin-bottom: 14px;
}

.main li { margin-bottom: 4px; }

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

/* Breadcrumb */
.breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--text-secondary); }

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

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  transition: all 0.2s;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card h3 {
  margin-top: 0;
  font-size: 16px;
  color: var(--text-primary);
}

.card p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.card .stat {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent-hover);
  margin: 8px 0;
}

.card a {
  display: inline-block;
  margin-top: 8px;
  font-size: 13px;
  font-weight: 600;
}

/* Code */
code {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: #F472B6;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 6px;
  padding: 16px;
  overflow-x: auto;
  margin: 12px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-primary);
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  background: var(--bg-card);
  border-radius: 8px;
  overflow: hidden;
}

th, td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

th {
  background: var(--bg-tertiary);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

tr:last-child td { border-bottom: none; }

tr:hover { background: var(--bg-tertiary); }

td code { font-size: 12px; }

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge-get { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.badge-post { background: rgba(59, 130, 246, 0.15); color: var(--info); }
.badge-put { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.badge-delete { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.badge-public { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.badge-auth { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.badge-admin { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.badge-pro { background: linear-gradient(135deg, #4F46E5, #06B6D4); color: white; }
.badge-new { background: rgba(168, 85, 247, 0.15); color: #A855F7; }

/* Callout */
.callout {
  background: var(--bg-card);
  border-left: 4px solid var(--accent);
  padding: 12px 16px;
  margin: 16px 0;
  border-radius: 0 6px 6px 0;
}
.callout.info { border-left-color: var(--info); }
.callout.success { border-left-color: var(--success); }
.callout.warning { border-left-color: var(--warning); }
.callout.danger { border-left-color: var(--danger); }

.callout-title {
  font-weight: 600;
  margin-bottom: 4px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Endpoint card */
.endpoint {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 14px;
  margin: 6px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.endpoint-method {
  min-width: 60px;
  text-align: center;
  padding: 3px 8px;
  border-radius: 3px;
  font-size: 11px;
  font-weight: 700;
}

.endpoint-path { flex: 1; color: var(--text-primary); font-weight: 500; }

.endpoint-desc {
  font-family: var(--font-sans);
  color: var(--text-secondary);
  font-size: 12px;
}

/* Step list (scenarios) */
.steps { counter-reset: step; list-style: none; margin-left: 0; }
.steps li {
  counter-increment: step;
  position: relative;
  padding: 16px 16px 16px 56px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 8px;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 14px;
  top: 16px;
  background: var(--accent);
  color: white;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
}
.steps li strong { color: #93C5FD; }

/* Flow diagram (ASCII style box) */
.flow {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 8px;
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  overflow-x: auto;
  color: var(--text-primary);
  white-space: pre;
  margin: 16px 0;
}

/* Tabs (used in some pages) */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
  gap: 4px;
}
.tab {
  padding: 10px 20px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 14px;
  border-bottom: 2px solid transparent;
  font-family: inherit;
}
.tab:hover { color: var(--text-primary); }
.tab.active { color: var(--accent-hover); border-bottom-color: var(--accent); }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* Stats row */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin: 20px 0;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
}
.stat-card .number {
  font-size: 28px;
  font-weight: 700;
  background: linear-gradient(135deg, #06B6D4, #4F46E5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-card .label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
}

/* Formula highlight */
.formula {
  background: rgba(79, 70, 229, 0.08);
  border: 1px solid rgba(79, 70, 229, 0.3);
  border-radius: 6px;
  padding: 12px 16px;
  margin: 12px 0;
  font-family: var(--font-mono);
  font-size: 14px;
  color: #C7D2FE;
}

/* Mobile */
@media (max-width: 768px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: relative;
    height: auto;
    width: 100%;
  }
  .main { padding: 16px; }
}

/* Footer */
.footer {
  margin-top: 60px;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12px;
  text-align: center;
}

/* Hide elements during search */
.hidden { display: none !important; }