/* ===== Reset & Base ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

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

:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.6);
  --bg-glass: rgba(255,255,255,0.04);
  --border-glass: rgba(255,255,255,0.08);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-cyan: #00d4ff;
  --accent-violet: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-green: #10b981;
  --accent-orange: #f59e0b;
  --gradient-primary: linear-gradient(135deg, #00d4ff, #8b5cf6);
  --gradient-hero: linear-gradient(135deg, #0a0e1a 0%, #1a1040 50%, #0a0e1a 100%);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-glow: 0 0 60px rgba(0,212,255,0.08);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent-violet); border-radius: 4px; }

/* ===== Animated Background ===== */
.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
}

.bg-glow {
  position: fixed; z-index: 0; pointer-events: none;
  width: 600px; height: 600px; border-radius: 50%;
  filter: blur(120px); opacity: 0.15;
}
.bg-glow--cyan { top: -200px; left: -100px; background: var(--accent-cyan); }
.bg-glow--violet { bottom: -200px; right: -100px; background: var(--accent-violet); }

/* ===== Navbar ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 0 2rem; height: 64px;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(10, 14, 26, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  transition: var(--transition);
}
.navbar.scrolled { box-shadow: 0 4px 30px rgba(0,0,0,0.3); }
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 1.25rem;
  text-decoration: none; color: var(--text-primary);
}
.nav-brand span {
  background: var(--gradient-primary);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  color: var(--text-secondary); text-decoration: none;
  font-size: 0.9rem; font-weight: 500;
  transition: var(--transition); position: relative;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition);
}
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  padding: 8px 20px; border-radius: 8px; font-size: 0.85rem;
  font-weight: 600; text-decoration: none;
  background: var(--gradient-primary); color: #fff;
  transition: var(--transition);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(0,212,255,0.3); }

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

/* ===== Hero ===== */
.hero {
  position: relative; z-index: 1;
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 120px 2rem 80px;
  background: var(--gradient-hero);
}
.hero-content { max-width: 800px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; border-radius: 999px; font-size: 0.8rem;
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  color: var(--accent-cyan); font-weight: 500;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.6s ease;
}
.hero-badge .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-green); animation: pulse 2s infinite; }

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900; line-height: 1.1;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.6s ease 0.1s both;
}
.hero h1 .gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p {
  font-size: 1.15rem; color: var(--text-secondary);
  max-width: 600px; margin: 0 auto 2.5rem;
  animation: fadeInUp 0.6s ease 0.2s both;
}
.hero-actions {
  display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.3s both;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: var(--radius-sm);
  font-size: 0.95rem; font-weight: 600;
  text-decoration: none; cursor: pointer; border: none;
  transition: var(--transition);
}
.btn--primary { background: var(--gradient-primary); color: #fff; }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,212,255,0.25); }
.btn--outline {
  background: transparent; color: var(--text-primary);
  border: 1px solid var(--border-glass);
}
.btn--outline:hover { border-color: var(--accent-cyan); background: var(--bg-glass); }

.hero-stats {
  display: flex; gap: 3rem; justify-content: center; margin-top: 3rem;
  animation: fadeInUp 0.6s ease 0.4s both;
}
.hero-stat { text-align: center; }
.hero-stat .value { font-size: 2rem; font-weight: 800; background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-stat .label { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }

/* ===== Sections ===== */
section { position: relative; z-index: 1; padding: 100px 2rem; }
.container { max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 4rem; }
.section-label {
  display: inline-block; font-size: 0.75rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 3px;
  color: var(--accent-cyan); margin-bottom: 1rem;
}
.section-title { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; margin-bottom: 1rem; }
.section-desc { color: var(--text-secondary); max-width: 600px; margin: 0 auto; font-size: 1.05rem; }

/* ===== Feature Cards ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}
.feature-card {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  transition: var(--transition);
  position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s ease;
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-card:hover { transform: translateY(-4px); border-color: rgba(0,212,255,0.2); box-shadow: var(--shadow-glow); }
.feature-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; margin-bottom: 1.2rem;
  background: var(--bg-glass); border: 1px solid var(--border-glass);
}
.feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.6rem; }
.feature-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }

/* ===== Architecture ===== */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}
.arch-card {
  text-align: center; padding: 2rem 1.5rem;
  background: var(--bg-card); border: 1px solid var(--border-glass);
  border-radius: var(--radius); transition: var(--transition);
}
.arch-card:hover { transform: translateY(-4px); border-color: rgba(139,92,246,0.3); }
.arch-card .arch-icon { font-size: 2rem; margin-bottom: 0.8rem; }
.arch-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem; }
.arch-card p { font-size: 0.8rem; color: var(--text-muted); }

/* ===== Code Block ===== */
.code-section { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.code-info h3 { font-size: 1.6rem; font-weight: 800; margin-bottom: 1rem; }
.code-info p { color: var(--text-secondary); margin-bottom: 1.5rem; line-height: 1.7; }
.code-block {
  background: #0d1117; border: 1px solid var(--border-glass);
  border-radius: var(--radius); overflow: hidden;
}
.code-block-header {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px; background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border-glass);
}
.code-dot { width: 10px; height: 10px; border-radius: 50%; }
.code-dot--red { background: #ff5f57; }
.code-dot--yellow { background: #febc2e; }
.code-dot--green { background: #28c840; }
.code-block-title { margin-left: 8px; font-size: 0.8rem; color: var(--text-muted); font-family: 'JetBrains Mono', monospace; }
.code-block pre {
  padding: 1.5rem; overflow-x: auto; font-size: 0.85rem;
  font-family: 'JetBrains Mono', monospace; line-height: 1.8;
}
.code-block code { color: #c9d1d9; }
.code-block .kw { color: #ff7b72; }
.code-block .type { color: #79c0ff; }
.code-block .str { color: #a5d6ff; }
.code-block .cmt { color: #8b949e; }
.code-block .fn { color: #d2a8ff; }
.code-block .num { color: #79c0ff; }

/* ===== Tech Stack Table ===== */
.tech-table {
  width: 100%; border-collapse: separate; border-spacing: 0;
  background: var(--bg-card); border: 1px solid var(--border-glass);
  border-radius: var(--radius); overflow: hidden;
}
.tech-table th {
  padding: 14px 20px; text-align: left; font-size: 0.8rem;
  text-transform: uppercase; letter-spacing: 2px;
  color: var(--accent-cyan); background: var(--bg-glass);
  border-bottom: 1px solid var(--border-glass);
}
.tech-table td {
  padding: 14px 20px; font-size: 0.9rem;
  border-bottom: 1px solid var(--border-glass);
  transition: var(--transition);
}
.tech-table tr:last-child td { border-bottom: none; }
.tech-table tr:hover td { background: rgba(0,212,255,0.03); }
.tech-badge {
  display: inline-block; padding: 3px 10px;
  border-radius: 6px; font-size: 0.8rem; font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
  background: rgba(0,212,255,0.1); color: var(--accent-cyan);
}

/* ===== Install Block ===== */
.install-tabs { display: flex; gap: 0; margin-bottom: 0; }
.install-tab {
  padding: 10px 24px; background: var(--bg-glass);
  border: 1px solid var(--border-glass); cursor: pointer;
  font-size: 0.85rem; font-weight: 600; color: var(--text-muted);
  transition: var(--transition);
}
.install-tab:first-child { border-radius: var(--radius-sm) 0 0 0; }
.install-tab:last-child { border-radius: 0 var(--radius-sm) 0 0; }
.install-tab.active { background: var(--accent-violet); color: #fff; border-color: var(--accent-violet); }
.install-content {
  background: #0d1117; border: 1px solid var(--border-glass);
  border-radius: 0 var(--radius-sm) var(--radius-sm) var(--radius-sm);
  padding: 1.5rem; display: none;
}
.install-content.active { display: block; }
.install-content pre {
  font-family: 'JetBrains Mono', monospace; font-size: 0.85rem;
  color: #c9d1d9; line-height: 1.7; overflow-x: auto;
}

/* ===== Footer ===== */
.footer {
  position: relative; z-index: 1;
  padding: 3rem 2rem; text-align: center;
  border-top: 1px solid var(--border-glass);
}
.footer p { color: var(--text-muted); font-size: 0.85rem; }
.footer a { color: var(--accent-cyan); text-decoration: none; }
.footer-links { display: flex; gap: 2rem; justify-content: center; margin-bottom: 1rem; }
.footer-links a { color: var(--text-secondary); font-size: 0.9rem; transition: var(--transition); }
.footer-links a:hover { color: var(--accent-cyan); }

/* ===== Animations ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.fade-in {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-toggle { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 64px; left: 0; right: 0;
    background: rgba(10,14,26,0.95); backdrop-filter: blur(20px);
    padding: 1rem 2rem; gap: 1rem;
    border-bottom: 1px solid var(--border-glass);
  }
  .hero-stats { gap: 1.5rem; flex-wrap: wrap; }
  .code-section { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .arch-grid { grid-template-columns: repeat(2, 1fr); }
}