/* ── Spook Systems — Global Styles ── */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

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

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a25;
  --text-primary: #d0d0d8;
  --text-secondary: #9999aa;
  --accent: #5a5a6e;
  --accent-glow: rgba(90, 90, 110, 0.3);
  --accent-bright: #b8b8c8;
  --border: #2a2a3a;
  --success: #00cec9;
  --code-bg: #141420;
  --nav-height: 60px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ── Three.js canvas ── */

#three-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ── Navigation ── */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  z-index: 100;
}

.nav-brand {
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--accent-bright);
  text-decoration: none;
  text-transform: uppercase;
}

.nav-brand span {
  color: var(--text-secondary);
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  transition: color 0.2s;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-bright);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.session-counter {
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--bg-card);
  padding: 0.25rem 0.7rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  white-space: nowrap;
}

.session-counter .count {
  color: var(--success);
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
}

/* ── Main content ── */

main {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
  padding: calc(var(--nav-height) + 2.5rem) 2rem 4rem;
}

/* ── Markdown rendering ── */

.md-content h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--accent-bright);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
}

.md-content h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.md-content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.md-content h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.4rem;
}

.md-content p {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.md-content em {
  color: var(--text-secondary);
}

.md-content strong {
  color: #fff;
  font-weight: 600;
}

.md-content a {
  color: var(--accent-bright);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.md-content a:hover {
  border-bottom-color: var(--accent-bright);
}

.md-content ul, .md-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.md-content li {
  margin-bottom: 0.35rem;
}

.md-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

/* Tables */
.md-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.9rem;
}

.md-content thead th {
  background: var(--bg-card);
  color: var(--accent-bright);
  font-weight: 600;
  text-align: left;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

.md-content tbody td {
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--border);
  vertical-align: top;
}

.md-content tbody tr:nth-child(even) {
  background: rgba(26, 26, 37, 0.5);
}

/* Code blocks */
.md-content code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85em;
  background: var(--code-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: var(--accent-bright);
}

.md-content pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1.25rem 0;
}

.md-content pre code {
  background: none;
  padding: 0;
  font-size: 0.82rem;
  color: var(--text-primary);
  line-height: 1.6;
}

/* Blockquotes */
.md-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  background: rgba(90, 90, 110, 0.08);
  border-radius: 0 6px 6px 0;
}

.md-content blockquote p {
  margin-bottom: 0;
}

/* ── Footer ── */

footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
  max-width: 860px;
  margin: 0 auto;
}

/* ── Loading state ── */

.loading {
  text-align: center;
  padding: 4rem;
  color: var(--text-secondary);
}

.loading::after {
  content: '';
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-left: 0.5rem;
  vertical-align: middle;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Responsive ── */

@media (max-width: 768px) {
  nav {
    padding: 0 1rem;
  }

  .nav-links {
    gap: 0.8rem;
  }

  .nav-links a {
    font-size: 0.8rem;
  }

  main {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .md-content h1 {
    font-size: 1.5rem;
  }

  .md-content table {
    font-size: 0.8rem;
  }

  .session-counter {
    display: none;
  }
}

@media (max-width: 480px) {
  .nav-brand span {
    display: none;
  }

  .nav-links {
    gap: 0.5rem;
  }
}