/* ========================================
   Apache Gluten — vllm.ai-inspired theme
   ======================================== */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --max-width:     1200px;
  --nav-height:    64px;
  --radius:        12px;
  --font-sans:     'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', monospace;
}

/* Dark scheme (default) */
:root,
html[data-theme="dark"] {
  color-scheme: dark;
  --bg-primary:    #0b0f1a;
  --bg-secondary:  #111827;
  --bg-card:       #1a2235;
  --bg-card-hover: #222d42;
  --text-primary:  #f1f5f9;
  --text-secondary:#94a3b8;
  --accent:        #6366f1;
  --accent-light:  #818cf8;
  --accent-glow:   rgba(99,102,241,0.25);
  --border:        #1e293b;
  --gradient-hero: linear-gradient(135deg, #0b0f1a 0%, #1e1b4b 50%, #0b0f1a 100%);
  --navbar-bg:     rgba(11,15,26,0.85);
  --hero-title-start: #ffffff;
  --link-hover:    #a5b4fc;
  --dropdown-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

/* Light scheme */
html[data-theme="light"] {
  color-scheme: light;
  --bg-primary:    #ffffff;
  --bg-secondary:  #f4f6fa;
  --bg-card:       #ffffff;
  --bg-card-hover: #f8fafc;
  --text-primary:  #0f172a;
  --text-secondary:#475569;
  --accent:        #4f46e5;
  --accent-light:  #4f46e5;
  --accent-glow:   rgba(79,70,229,0.15);
  --border:        #e2e8f0;
  --gradient-hero: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 50%, #f8fafc 100%);
  --navbar-bg:     rgba(255,255,255,0.85);
  --hero-title-start: #0f172a;
  --link-hover:    #3730a3;
  --dropdown-shadow: 0 8px 32px rgba(15,23,42,0.15);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background .25s, color .25s;
}

a { color: var(--accent-light); text-decoration: none; transition: color .2s; }
a:hover { color: var(--link-hover); }

img { max-width: 100%; height: auto; }

/* ---------- Utility ---------- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section   { padding: 80px 0; }
.section-alt { background: var(--bg-secondary); }
.text-center { text-align: center; }
.text-secondary { color: var(--text-secondary); }

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 48px;
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: var(--navbar-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-primary);
}

/* The logo image includes a dark wordmark that is invisible on the dark
   theme, so crop to the square glyph on the left. */
.navbar-brand img {
  height: 32px;
  width: 32px;
  object-fit: cover;
  object-position: left center;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.navbar-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color .2s;
}

.navbar-links a:hover { color: var(--text-primary); }

.navbar-github {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: border-color .2s, color .2s;
}

.navbar-github:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

/* Theme (light/dark) toggle */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: border-color .2s, color .2s;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

/* Show the icon of the scheme you would switch TO */
html[data-theme="light"] .theme-toggle .icon-sun { display: none; }
html[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
:root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
  min-height: clamp(520px, 85vh, 820px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--gradient-hero);
  padding: calc(var(--nav-height) + 48px) 0 64px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.hero-content { position: relative; z-index: 1; max-width: 820px; padding: 0 24px; }

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(99,102,241,0.15);
  border: 1px solid rgba(99,102,241,0.3);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--accent-light);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 3.75rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--hero-title-start) 30%, var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  transition: transform .15s, box-shadow .2s;
  cursor: pointer;
  border: none;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 24px var(--accent-glow);
}
.btn-primary:hover { background: var(--accent-light); color: #fff; }

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

/* ---------- Features ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color .25s, transform .25s, box-shadow .25s;
}

.feature-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.feature-icon {
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(99,102,241,0.12);
  border-radius: 10px;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ---------- Stats bar ---------- */
.stats {
  display: flex;
  justify-content: center;
  gap: 64px;
  flex-wrap: wrap;
  padding: 48px 0;
}

.stat-item { text-align: center; }

.stat-number {
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--accent-light);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ---------- Architecture ---------- */
.architecture-img {
  max-width: 860px;
  margin: 0 auto;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

/* ---------- Performance ---------- */
.perf-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-top: 32px;
}

.perf-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.perf-card img {
  width: 100%;
  display: block;
}

.perf-card .perf-caption {
  padding: 16px 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ---------- Powered By / Logos ---------- */
.logo-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px 48px;
  margin-top: 40px;
}

.logo-grid span {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 12px 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color .2s, color .2s;
}

.logo-grid span:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

/* ---------- CTA banner ---------- */
.cta-banner {
  text-align: center;
  padding: 80px 24px;
  background: var(--gradient-hero);
  position: relative;
}

.cta-banner h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-banner p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 32px;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.footer-col ul { list-style: none; }

.footer-col li { margin-bottom: 10px; }

.footer-col a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}
.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.footer-bottom a { color: var(--text-secondary); }
.footer-bottom a:hover { color: var(--text-primary); }

/* ---------- Page content (docs/blog/etc) ---------- */
.page-wrapper {
  padding-top: calc(var(--nav-height) + 48px);
  padding-bottom: 80px;
  min-height: 70vh;
}

.page-wrapper .container { max-width: 860px; }

.page-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-content h1,
.page-content h2,
.page-content h3,
.page-content h4 {
  margin-top: 2em;
  margin-bottom: 0.75em;
  font-weight: 600;
}

.page-content h1 { font-size: 2rem; }
.page-content h2 { font-size: 1.5rem; border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.page-content h3 { font-size: 1.2rem; }

.page-content p  { margin-bottom: 1em; color: var(--text-secondary); }
.page-content li { color: var(--text-secondary); margin-bottom: 4px; }

.page-content ul,
.page-content ol {
  margin-left: 24px;
  margin-bottom: 1em;
}

.page-content code {
  background: var(--bg-card);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.page-content pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  overflow-x: auto;
  margin-bottom: 1.5em;
}

.page-content pre code {
  background: none;
  padding: 0;
}

.page-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5em;
  font-size: 0.9rem;
}

.page-content th {
  background: var(--bg-card);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--border);
}

.page-content td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

.page-content img {
  border-radius: 8px;
  border: 1px solid var(--border);
  margin: 16px 0;
}

.page-content blockquote {
  border-left: 3px solid var(--accent);
  margin: 1em 0;
  padding: 12px 20px;
  background: var(--bg-card);
  border-radius: 0 8px 8px 0;
}

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

.page-content strong { color: var(--text-primary); }

/* ---------- Blog list ---------- */
.blog-list { list-style: none; }

.blog-list li {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.blog-list h2 { font-size: 1.3rem; margin: 0 0 8px; border: none; padding: 0; }
.blog-list h2 a { color: var(--text-primary); }
.blog-list h2 a:hover { color: var(--accent-light); }

/* ---------- ASF dropdown (simplified for new theme) ---------- */
.asf-dropdown {
  position: relative;
  display: inline-block;
}

.asf-dropdown-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: border-color .2s;
}

.asf-dropdown-btn:hover { border-color: var(--accent); color: var(--text-primary); }

.asf-dropdown-content {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 4px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-width: 180px;
  box-shadow: var(--dropdown-shadow);
  z-index: 100;
  overflow: hidden;
}

.asf-dropdown:hover .asf-dropdown-content { display: block; }

.asf-dropdown-content a {
  display: block;
  padding: 10px 16px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: background .15s;
}

.asf-dropdown-content a:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

/* ---------- Code block (homepage) ---------- */
.code-block {
  max-width: 760px;
  margin: 0 auto;
  text-align: left;
}

.code-block pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  overflow-x: auto;
}

.code-block code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--text-primary);
}

/* ---------- News cards ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  text-align: left;
}

.news-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color .25s, transform .25s, box-shadow .25s;
}

.news-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.news-card .news-date {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.news-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
}

/* ---------- Post meta ---------- */
.post-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 8px;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid   { grid-template-columns: 1fr 1fr; }
  .hero h1       { font-size: 2.75rem; }
  .perf-grid     { grid-template-columns: 1fr; }
  .news-grid     { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .features-grid { grid-template-columns: 1fr; }
  .footer-grid   { grid-template-columns: 1fr; }
  .stats         { gap: 32px; }
  .hero h1       { font-size: 2rem; }
  .section-title { font-size: 1.75rem; }

  .navbar-links  { display: none; }
  .nav-toggle    { display: block; }

  .navbar-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    gap: 16px;
  }
}