/* Codex Fast product site — inspired by modern dark product landings */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg: #0a0a0f;
  --color-bg-secondary: #12121a;
  --color-bg-tertiary: #1a1a24;
  --color-border: #2a2a3a;
  --color-border-light: #3a3a4a;
  --color-primary: #00d9ff;
  --color-primary-dark: #00b8e6;
  --color-primary-light: #4de5ff;
  --color-accent: #6366f1;
  --color-accent-light: #818cf8;
  --color-ok: #34d399;
  --color-text: #e4e4e7;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, monospace;
  --container: 1120px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --shadow-glow: 0 0 60px rgba(0, 217, 255, 0.12);
  --transition: 200ms ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-light); }

.container {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

/* Nav */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
}
.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
}
.logo img { border-radius: 8px; }
.logo:hover { color: var(--color-text); }
.logo:hover img { filter: drop-shadow(0 0 10px rgba(0, 217, 255, 0.45)); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
}
.nav-links a:hover { color: var(--color-primary); }
.nav-cta {
  padding: 8px 14px !important;
  border-radius: 999px;
  border: 1px solid rgba(0, 217, 255, 0.35);
  background: rgba(0, 217, 255, 0.08);
  color: var(--color-primary) !important;
}
.nav-cta:hover { background: rgba(0, 217, 255, 0.16); }
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: transparent;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
  font-family: inherit;
}
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #061018;
  box-shadow: 0 8px 24px rgba(0, 217, 255, 0.2);
}
.btn-primary:hover {
  transform: translateY(-1px);
  color: #061018;
  box-shadow: 0 12px 28px rgba(0, 217, 255, 0.28);
}
.btn-secondary, .btn-ghost {
  background: rgba(255, 255, 255, 0.03);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover, .btn-ghost:hover {
  border-color: var(--color-border-light);
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text);
}

/* Hero */
.hero {
  position: relative;
  padding: 140px 0 88px;
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 520px;
  background:
    radial-gradient(circle at 30% 40%, rgba(0, 217, 255, 0.18), transparent 45%),
    radial-gradient(circle at 70% 35%, rgba(99, 102, 241, 0.16), transparent 42%);
  pointer-events: none;
  filter: blur(10px);
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(0, 217, 255, 0.25);
  background: rgba(0, 217, 255, 0.08);
  color: var(--color-primary-light);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-ok);
  box-shadow: 0 0 10px rgba(52, 211, 153, 0.8);
}
.hero h1 {
  font-size: clamp(2.2rem, 4.6vw, 3.5rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin-bottom: 18px;
}
.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-light) 55%, #a78bfa 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-line2 {
  display: inline-block;
  margin-top: 6px;
  font-size: 0.72em;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}
.hero-subtitle {
  max-width: 540px;
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  margin-bottom: 28px;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  list-style: none;
  color: var(--color-text-muted);
  font-size: 0.88rem;
}
.hero-meta li::before {
  content: "✓";
  color: var(--color-primary);
  font-weight: 700;
  margin-right: 8px;
}

.panel-window {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-glow), 0 24px 60px rgba(0, 0, 0, 0.45);
  overflow: hidden;
}
.panel-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  background: var(--color-bg-tertiary);
  border-bottom: 1px solid var(--color-border);
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }
.panel-title {
  margin-left: 8px;
  color: var(--color-text-muted);
  font-size: 0.78rem;
  font-family: var(--font-mono);
}
.panel-body { padding: 22px; }
.status-chip {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.status-chip.ok {
  color: var(--color-ok);
  background: rgba(52, 211, 153, 0.12);
  border: 1px solid rgba(52, 211, 153, 0.25);
}
.panel-rows { display: grid; gap: 2px; margin-bottom: 18px; }
.panel-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid rgba(42, 42, 58, 0.9);
  font-size: 0.92rem;
}
.panel-row span { color: var(--color-text-muted); }
.panel-row .ok { color: var(--color-ok); }
.panel-row .accent { color: var(--color-primary); }
.panel-code {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #0d0d14;
  overflow: hidden;
}
.panel-code pre {
  margin: 0;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.7;
  overflow-x: auto;
}
.c-muted { color: var(--color-text-muted); }
.c-key { color: var(--color-accent-light); }
.c-str { color: var(--color-primary-light); }
.c-ok { color: var(--color-ok); }

/* Sections */
.section { padding: 88px 0; }
.section-header {
  max-width: 640px;
  margin-bottom: 40px;
}
.eyebrow {
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}
.section-desc { color: var(--color-text-secondary); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.feature-card {
  background: linear-gradient(180deg, rgba(26, 26, 36, 0.9), rgba(18, 18, 26, 0.95));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.feature-card:hover {
  border-color: rgba(0, 217, 255, 0.35);
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
}
.feature-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  margin-bottom: 16px;
  color: var(--color-primary);
  background: rgba(0, 217, 255, 0.08);
  border: 1px solid rgba(0, 217, 255, 0.18);
}
.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.feature-card p {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
}

.workflow { background: rgba(18, 18, 26, 0.55); border-block: 1px solid var(--color-border); }
.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}
.steps-three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.steps li {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  min-height: 180px;
}
.step-num {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
}
.steps h3 { font-size: 1rem; margin-bottom: 8px; }
.steps p { color: var(--color-text-secondary); font-size: 0.88rem; }

.download-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: end;
  margin-bottom: 20px;
}
.select-wrap {
  display: grid;
  gap: 6px;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  font-weight: 600;
}
.select-wrap select {
  min-width: 220px;
  padding: 11px 14px;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
  color: var(--color-text);
  font: inherit;
}
.download-list { display: grid; gap: 12px; }
.package {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 20px 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
  transition: border-color var(--transition);
}
.package:hover { border-color: rgba(0, 217, 255, 0.3); }
.package h3 { font-size: 1.05rem; margin-bottom: 8px; }
.package .meta { color: var(--color-text-muted); font-size: 0.85rem; margin-bottom: 8px; }
.package code {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-text-muted);
  overflow-wrap: anywhere;
}
.package .actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: end; }
.tag {
  display: inline-flex;
  margin: 0 6px 6px 0;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
}
.tag.latest {
  color: var(--color-primary);
  border-color: rgba(0, 217, 255, 0.3);
  background: rgba(0, 217, 255, 0.08);
}
.empty, .hint, .error {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}
.error { color: #fb7185; }
.hint { margin-top: 18px; }
.hint a { overflow-wrap: anywhere; }

.footer {
  border-top: 1px solid var(--color-border);
  padding: 36px 0 48px;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.footer-brand img { border-radius: 8px; }
.footer-brand strong { display: block; }
.footer-brand span { color: var(--color-text-muted); font-size: 0.85rem; }
.footer-copy { color: var(--color-text-muted); font-size: 0.82rem; }

@media (max-width: 960px) {
  .hero-inner, .features-grid { grid-template-columns: 1fr 1fr; }
  .steps, .steps-three { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px 18px;
    background: rgba(10, 10, 15, 0.96);
    border-bottom: 1px solid var(--color-border);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 4px; }
  .hero { padding-top: 110px; }
  .hero-inner, .features-grid, .steps, .steps-three, .package { grid-template-columns: 1fr; }
  .package .actions { justify-content: flex-start; }
  .section { padding: 64px 0; }
}