:root {
  --bg: #0b0e14;
  --bg-soft: #11151f;
  --card: #151a26;
  --border: #232b3b;
  --text: #e6e9f0;
  --muted: #9aa3b5;
  --accent: #ff9d00;
  --accent-2: #ff5c8a;
  --code-bg: #0f1420;
  --radius: 14px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  background: radial-gradient(1200px 600px at 70% -10%, #1a2233 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.55;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 14, 20, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
}
.brand:hover { text-decoration: none; }
.brand-logo { height: 26px; border-radius: 6px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
  color: var(--muted);
}
.nav-links a:not(.cta) { color: var(--muted); }
.nav-links a:not(.cta):hover { color: var(--text); text-decoration: none; }
.cta {
  background: var(--accent);
  color: #10131a !important;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 999px;
}
.cta:hover { text-decoration: none; background: #ffb033; }

/* ---------- hero ---------- */
.hero {
  max-width: 860px;
  margin: 0 auto;
  padding: 72px 20px 56px;
  text-align: center;
}
.hero-logo { width: 190px; border-radius: 12px; }
.hero h1 {
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 26px 0 12px;
  line-height: 1.1;
}
.hero-sub {
  font-size: 17px;
  color: var(--muted);
  max-width: 640px;
  margin: 0 auto 22px;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 30px;
}
.hero-badges span {
  font-size: 13px;
  color: var(--muted);
  background: var(--card);
  border: 1px solid var(--border);
  padding: 5px 12px;
  border-radius: 999px;
}
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #10131a; }
.btn-primary:hover { background: #ffb033; }
.btn-ghost { color: var(--text); border: 1px solid var(--border); background: var(--card); }
.btn-ghost:hover { border-color: var(--muted); }

/* ---------- sections ---------- */
.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 48px 20px;
}
.section-title {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}
.section-sub { color: var(--muted); margin: 0 0 28px; max-width: 760px; }

/* ---------- demos ---------- */
.demo-block { margin-bottom: 42px; }
.demo-block-title {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 14px;
  color: var(--accent-2);
}
.demo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.demo-grid > div {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.demo-grid video {
  width: 100%;
  display: block;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: #000;
}
.demo-caption {
  margin: 0;
  padding: 10px 12px;
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.4;
}
.demo-caption b { color: var(--text); }
.demo-input .demo-caption { background: rgba(255, 92, 138, 0.07); }

/* ---------- cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0 0 14px; color: var(--muted); font-size: 14px; }
.card code {
  display: block;
  font-size: 12.5px;
  color: #b7c3d8;
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 8px;
  white-space: normal;
}
.card-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  padding: 3px 9px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.card-tag.strong { color: #7dffa8; border-color: rgba(125, 255, 168, 0.3); }

/* ---------- prompting ---------- */
.prompt-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.prompt-layout > div {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}
.prompt-layout h3 { margin: 0 0 10px; font-size: 15px; }
.prompt-layout ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 14px; }
.prompt-layout li { margin-bottom: 8px; }
.kw {
  font-family: "SFMono-Regular", Consolas, monospace;
  color: var(--accent);
  font-weight: 700;
}

/* ---------- code ---------- */
.code-block {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.6;
  margin: 0;
}
.code-block code { font-family: "SFMono-Regular", Consolas, "JetBrains Mono", monospace; }
.c { color: #5b6678; }
.k { color: #79b8ff; }
.s { color: #9ecb78; }

/* ---------- cta band ---------- */
.cta-band { text-align: center; }
.cta-band h2 { font-size: 26px; margin: 0 0 8px; }
.cta-band p { color: var(--muted); margin: 0 0 22px; }

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  margin-top: 24px;
}
.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 28px 20px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer p { margin: 0 0 4px; font-size: 14px; }
.footer .muted { color: var(--muted); font-size: 13px; }
.footer-links { display: flex; flex-direction: column; gap: 6px; font-size: 14px; text-align: right; }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .cards, .prompt-layout { grid-template-columns: 1fr 1fr; }
  .demo-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .cards, .prompt-layout { grid-template-columns: 1fr; }
  .demo-grid { grid-template-columns: 1fr; }
  .nav-links a:not(.cta) { display: none; }
  .footer-links { text-align: left; }
}