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

:root {
  --bg: #0a0e1a;
  --bg-alt: #0f1525;
  --bg-card: #141b2d;
  --border: #1e2844;
  --text: #e8edf5;
  --text-muted: #8892a8;
  --cyan: #00d4ff;
  --cyan-dim: rgba(0, 212, 255, 0.1);
  --green: #32f08c;
  --green-dim: rgba(50, 240, 140, 0.08);
  --radius: 12px;
  --radius-sm: 8px;
}

html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--cyan); text-decoration: none; transition: opacity .2s; }
a:hover { opacity: .8; }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ── Navbar ── */
.navbar {
  position: fixed; top: 0; width: 100%; z-index: 100;
  background: rgba(10, 14, 26, .85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: 60px;
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
}
.logo {
  font-size: 18px; font-weight: 700;
  background: linear-gradient(135deg, var(--cyan), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a { color: var(--text-muted); font-size: 14px; }
.nav-links a:hover { color: var(--text); }
.nav-gh {
  padding: 6px 16px; border-radius: 999px;
  border: 1px solid var(--border); font-size: 13px !important;
}

/* ── Hero ── */
.hero {
  min-height: 80vh; display: flex; align-items: center;
  padding: 100px 0 60px;
  background: radial-gradient(ellipse 600px 400px at 50% 30%, rgba(0, 212, 255, .06), transparent);
  text-align: center;
}
.hero-inner { display: flex; flex-direction: column; align-items: center; gap: 24px; }
.hero-badge {
  display: inline-block; padding: 6px 20px; border-radius: 999px;
  font-size: 13px; letter-spacing: .5px;
  background: var(--cyan-dim); border: 1px solid rgba(0, 212, 255, .2);
  color: var(--cyan);
}
.hero-title {
  font-size: clamp(2.2rem, 6vw, 3.6rem); font-weight: 800;
  line-height: 1.15;
}
.text-cyan { color: var(--cyan); }
.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.2rem); color: var(--text-muted);
  max-width: 600px;
}
.hero-flow {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
  gap: 8px; font-size: 13px; color: var(--text-muted);
}
.hero-flow .arrow { color: var(--border); font-size: 16px; }
.hero-flow .highlight { color: var(--cyan); font-weight: 600; }
.hero-actions { display: flex; gap: 16px; margin-top: 8px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 999px;
  font-size: 15px; font-weight: 600; transition: all .25s;
  cursor: pointer; border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--cyan), #00a8d4);
  color: #000;
}
.btn-primary:hover { box-shadow: 0 0 30px rgba(0, 212, 255, .3); transform: translateY(-1px); }
.btn-secondary {
  background: transparent; color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--text-muted); }
.btn-codespaces {
  background: linear-gradient(135deg, #1f8838, #2da44e);
  color: #fff;
}
.btn-codespaces:hover { box-shadow: 0 0 20px rgba(31, 136, 56, .4); transform: translateY(-1px); }
.nav-cs {
  padding: 6px 16px; border-radius: 999px;
  background: rgba(31, 136, 56, .15);
  color: #2da44e !important; font-size: 13px !important;
  border: 1px solid rgba(31, 136, 56, .3);
}
.nav-cs:hover { background: rgba(31, 136, 56, .25) !important; }

/* ── Badge Bar ── */
.badge-bar {
  padding: 20px 0; text-align: center;
  background: var(--bg-alt);
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.badge-bar img { display: inline; margin: 4px 3px; }

/* ── Sections ── */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-title {
  text-align: center; font-size: 1.8rem; font-weight: 700;
  margin-bottom: 48px;
}

/* ── Features Grid ── */
.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px; transition: all .25s;
}
.feature-card:hover {
  border-color: rgba(0, 212, 255, .3);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, .3);
}
.feature-icon { font-size: 28px; margin-bottom: 16px; }
.feature-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ── Architecture ── */
.arch-flow {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
  gap: 8px; margin-bottom: 32px;
}
.arch-step {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 18px;
  font-size: 13px; font-weight: 500; white-space: nowrap;
}
.arch-step.arch-last { border-color: rgba(0, 212, 255, .4); }
.arch-arrow { color: var(--cyan); font-size: 18px; font-weight: 700; }
.arch-desc { text-align: center; color: var(--text-muted); font-size: 14px; max-width: 700px; margin: 0 auto; }
.arch-desc strong { color: var(--text); }

/* ── Gallery ── */
.gallery-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.gallery-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
}
.gallery-item img { width: 100%; }
.gallery-item p { padding: 12px 16px; font-size: 13px; color: var(--text-muted); }

/* ── Quick Start ── */
.qs-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px; margin-bottom: 32px;
}
.qs-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
}
.qs-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 16px; }
.qs-card pre {
  background: rgba(0,0,0,.3); border-radius: var(--radius-sm);
  padding: 16px; font-size: 13px; line-height: 1.7; overflow-x: auto;
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
}
.qs-card code { color: var(--green); }
.qs-card .comment { color: var(--text-muted); }
.qs-more { text-align: center; font-size: 14px; color: var(--text-muted); }

/* ── Footer ── */
.footer {
  padding: 32px 0; border-top: 1px solid var(--border);
  background: var(--bg-alt);
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
}
.footer-brand {
  font-weight: 700;
  background: linear-gradient(135deg, var(--cyan), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-desc { color: var(--text-muted); font-size: 13px; margin-left: 12px; }
.footer-right { font-size: 13px; color: var(--text-muted); }
.footer-right a { color: var(--text-muted); }
.footer-right a:hover { color: var(--text); }
.footer-sep { margin: 0 8px; }

/* ── Responsive ── */
@media (max-width: 640px) {
  .nav-links { gap: 12px; }
  .nav-links a { font-size: 12px; }
  .hero-flow { font-size: 11px; gap: 4px; }
  .features-grid, .gallery-grid, .qs-grid { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
  .arch-step { font-size: 11px; padding: 6px 12px; }
  .footer-inner { flex-direction: column; text-align: center; }
}