/* ==========================================================================
   LSM-Vec Shared Stylesheet
   Dark theme matching the benchmark dashboard design.
   Used by: index.html, docs.html, benchmark.html
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  --bg: #0a0e17;
  --surface: #111827;
  --surface2: #1a2235;
  --border: #1e293b;
  --text: #e2e8f0;
  --text-muted: #64748b;
  --accent: #06d6a0;
  --accent-glow: rgba(6, 214, 160, 0.15);
  --radius: 16px;
}

/* --------------------------------------------------------------------------
   2. Reset + Body Base
   -------------------------------------------------------------------------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  padding-top: 64px; /* space for the fixed nav bar */
}

/* --------------------------------------------------------------------------
   3. Background Effects
   -------------------------------------------------------------------------- */

/* Subtle grid overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 41, 59, 0.3) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 41, 59, 0.3) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* Ambient glow – top-right corner */
body::after {
  content: '';
  position: fixed;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(6, 214, 160, 0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* --------------------------------------------------------------------------
   4. Navigation Bar
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  display: flex;
  align-items: center;
  padding: 0 32px;
}

.nav-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.nav-logo span {
  background: linear-gradient(135deg, var(--accent), #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 24px;
  margin-left: auto;
  align-items: center;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* Mobile hamburger button – hidden on desktop */
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  margin-left: auto;
}

/* --------------------------------------------------------------------------
   5. Container
   -------------------------------------------------------------------------- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 48px 32px;
  position: relative;
  z-index: 1;
}

/* --------------------------------------------------------------------------
   6. Reusable Card Component
   -------------------------------------------------------------------------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

/* Accent line that fades in on hover */
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.card:hover::before {
  opacity: 0.5;
}

/* --------------------------------------------------------------------------
   7. Badge
   -------------------------------------------------------------------------- */
.badge {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--accent);
  border-radius: 100px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  margin-bottom: 20px;
}

/* --------------------------------------------------------------------------
   8. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 8px;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.25s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}

.btn-primary:hover {
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   9. Code Blocks
   -------------------------------------------------------------------------- */
code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  background: var(--surface2);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent);
}

pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  overflow-x: auto;
}

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

/* --------------------------------------------------------------------------
   10. Tables (API documentation)
   -------------------------------------------------------------------------- */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
}

th {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 2px solid var(--border);
  color: var(--text-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-family: 'JetBrains Mono', monospace;
}

td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   11. Footer
   -------------------------------------------------------------------------- */
.footer {
  text-align: center;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12px;
  opacity: 0.5;
}

/* --------------------------------------------------------------------------
   12. Animations
   -------------------------------------------------------------------------- */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   13. Responsive / Mobile Navigation
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .nav-hamburger {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 16px 32px;
    gap: 16px;
    margin-left: 0; /* override the desktop margin-left: auto */
  }

  .nav-links.open {
    display: flex;
  }
}