/* ============================================
   СФЕРА — Модель данных
   ============================================ */

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

:root {
  --bg: #0a0f1a;
  --bg-alt: #0d1b2a;
  --bg-card: #111d2e;
  --text: #e0e5ec;
  --text-dim: #8899aa;
  --text-muted: #556677;
  --blue: #64b5f6;
  --blue-dim: #2a5a8a;
  --green: #4caf50;
  --red: #e53935;
  --orange: #ff9800;
  --gold: #ffd54f;
  --border: rgba(100, 181, 246, 0.12);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  font-size: 16px;
}

/* --- Layout --- */
.page-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 15, 26, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}

.page-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.page-header-logo {
  font-size: 16px;
  letter-spacing: 5px;
  font-weight: 300;
  color: var(--text);
}

.page-header-logo span { color: var(--blue); }

.page-header-back {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 1px;
  transition: color 0.3s;
}

.page-header-back:hover { color: var(--blue); }

.content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 60px 40px 100px;
}

/* --- Typography --- */
h1 {
  font-size: 42px;
  font-weight: 200;
  letter-spacing: 2px;
  margin-bottom: 12px;
  color: #fff;
}

h1 strong { font-weight: 600; }

.subtitle {
  font-size: 18px;
  color: var(--text-dim);
  margin-bottom: 50px;
  font-weight: 300;
}

h2 {
  font-size: 28px;
  font-weight: 400;
  color: var(--blue);
  margin-top: 80px;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  letter-spacing: 0.5px;
}

h3 {
  font-size: 20px;
  font-weight: 500;
  color: var(--text);
  margin-top: 50px;
  margin-bottom: 16px;
}

h4 {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-dim);
  margin-top: 24px;
  margin-bottom: 10px;
}

p {
  margin-bottom: 16px;
  color: var(--text-dim);
}

/* --- Code blocks --- */
pre {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-left: 3px solid var(--blue-dim);
  padding: 20px 24px;
  overflow-x: auto;
  margin: 20px 0;
  font-size: 13px;
  line-height: 1.6;
}

code {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--blue);
}

pre code {
  color: var(--text-dim);
}

/* --- Tables --- */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
}

th {
  text-align: left;
  padding: 12px 16px;
  background: rgba(100, 181, 246, 0.05);
  border-bottom: 2px solid var(--border);
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 500;
}

td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
}

tr:hover td {
  background: rgba(100, 181, 246, 0.02);
}

td:first-child {
  color: var(--text);
  font-weight: 500;
}

/* --- Lists --- */
ul, ol {
  margin: 12px 0 12px 20px;
  color: var(--text-dim);
}

li {
  margin-bottom: 6px;
  line-height: 1.6;
}

li code {
  background: rgba(100, 181, 246, 0.08);
  padding: 1px 6px;
  border-radius: 2px;
  font-size: 12px;
}

/* --- Blockquote --- */
blockquote {
  border-left: 3px solid var(--blue-dim);
  padding: 16px 24px;
  margin: 20px 0;
  background: rgba(100, 181, 246, 0.03);
  color: var(--text-dim);
  font-style: italic;
}

/* --- HR --- */
hr {
  border: none;
  height: 1px;
  background: var(--border);
  margin: 40px 0;
}

/* --- TOC anchors --- */
h2:target, h3:target {
  scroll-margin-top: 70px;
}

/* --- Entity cards highlighting --- */
h3 + pre {
  border-left-color: var(--blue);
}

/* --- Stats badge --- */
.stats-badge {
  display: inline-flex;
  gap: 30px;
  padding: 16px 30px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  margin-bottom: 40px;
}

.stats-badge-item {
  text-align: center;
}

.stats-badge-num {
  font-size: 28px;
  font-weight: 200;
  font-family: var(--mono);
  color: var(--blue);
  line-height: 1;
}

.stats-badge-label {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 1px;
  margin-top: 4px;
}

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

/* --- Responsive --- */
@media (max-width: 768px) {
  .content { padding: 30px 20px 60px; }
  h1 { font-size: 30px; }
  h2 { font-size: 22px; }
  pre { font-size: 11px; padding: 12px; }
  table { font-size: 12px; }
  th, td { padding: 8px 10px; }
  .stats-badge { flex-wrap: wrap; gap: 16px; }
}