:root {
  --bg: #0f1117;
  --bg-2: #151a26;
  --card: #1c2233;
  --accent: #ffb000;
  --accent-2: #00d0ff;
  --text: #f3f6ff;
  --muted: #b8c0d9;
  --line: #2b3247;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(circle at 10% 10%, #1a2136, transparent 50%),
    radial-gradient(circle at 80% 0%, #1d1b34, transparent 45%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  font-family: "Space Grotesk", "Trebuchet MS", Arial, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

header {
  padding: 32px 24px 16px;
  border-bottom: 1px solid var(--line);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

.top-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.top-links a {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  color: var(--muted);
  font-size: 0.85rem;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.top-links a:hover {
  color: var(--text);
  border-color: var(--accent-2);
}

.hero h1 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: -0.02em;
}

.hero p {
  margin: 8px 0 0;
  color: var(--muted);
}

main {
  padding: 24px 24px 64px;
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  display: grid;
  gap: 10px;
}

.card h3 {
  margin: 0;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.badge {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.75rem;
}

.section-title {
  font-size: 1.1rem;
  margin: 28px 0 14px;
}

.demo-shell {
  display: grid;
  gap: 20px;
}

.demo-card {
  background: rgba(28, 34, 51, 0.6);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
}

.demo-card h2 {
  margin: 0 0 10px;
}

.demo-form {
  display: grid;
  gap: 12px;
}

.demo-form label {
  display: block;
  margin-bottom: 6px;
}

.demo-form input[type="text"],
.demo-form input[type="email"] {
  width: min(360px, 100%);
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid #c7c7c7;
}

.demo-form button {
  width: fit-content;
  padding: 8px 16px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(120deg, var(--accent), #ff6a00);
  color: #111;
  font-weight: 600;
  cursor: pointer;
}

.code-block {
  background: #0b0f1a;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  overflow: auto;
  font-size: 0.85rem;
  color: #d6d9e6;
}

.code-block pre {
  margin: 0;
  white-space: pre-wrap;
}

.playground {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.playground textarea {
  width: 100%;
  min-height: 240px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #0b0f1a;
  color: #d6d9e6;
  padding: 12px;
  font-family: "JetBrains Mono", "Courier New", monospace;
  font-size: 0.85rem;
}

.playground iframe {
  width: 100%;
  min-height: 320px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
}

.playground-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.playground-actions button {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
}

.playground-actions button.primary {
  border: none;
  background: linear-gradient(120deg, var(--accent), #ff6a00);
  color: #111;
}

.note {
  color: var(--muted);
  font-size: 0.85rem;
}