:root {
  --bg: #0f1117;
  --panel: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --green: #3fb950;
  --cyan: #79c0ff;
  --yellow: #d29922;
  --magenta: #d2a8ff;
  --orange: #ffa657;
  --red: #f85149;
  --accent: #58a6ff;
  --font: "Inter", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --tok-kw: #ff7b72;
  --tok-fn: #d2a8ff;
  --tok-str: #a5d6ff;
  --tok-num: #79c0ff;
  --tok-const: #79c0ff;
  --tok-builtin: #ffa657;
  --tok-com: #8b949e;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(15, 17, 23, 0.9);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
}

.logo span {
  color: var(--green);
}

nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

nav a {
  color: var(--muted);
  font-size: 0.95rem;
}

nav a.active,
nav a:hover {
  color: var(--text);
  text-decoration: none;
}

.hero {
  padding: 64px 0 40px;
}

.eyebrow {
  color: var(--green);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  margin: 0 0 16px;
}

.lead {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 720px;
  margin-bottom: 28px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 12px 18px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.btn:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(180deg, #1f6feb, #1158c7);
  border-color: #1f6feb;
  color: #fff;
}

.btn-primary:hover {
  background: linear-gradient(180deg, #388bfd, #1f6feb);
  border-color: #388bfd;
  color: #fff;
}

.btn-success {
  background: rgba(63, 185, 80, 0.12);
  border-color: rgba(63, 185, 80, 0.4);
  color: var(--green);
}

.btn-success.copied {
  background: rgba(63, 185, 80, 0.25);
}

.prompt-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  margin: 32px 0;
}

.prompt-card h2 {
  margin-top: 0;
  font-size: 1.25rem;
}

.prompt-preview {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--muted);
  max-height: 220px;
  overflow: auto;
  white-space: pre-wrap;
  margin: 16px 0;
}

.code-block {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.88rem;
  line-height: 1.55;
  margin: 16px 0;
  white-space: pre;
  tab-size: 4;
}

.tok-kw {
  color: var(--tok-kw);
}

.tok-fn {
  color: var(--tok-fn);
}

.tok-str {
  color: var(--tok-str);
}

.tok-num {
  color: var(--tok-num);
}

.tok-const {
  color: var(--tok-const);
}

.tok-builtin {
  color: var(--tok-builtin);
}

.tok-com {
  color: var(--tok-com);
  font-style: italic;
}

/* Typed API signatures */
.api-sig {
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 600;
  background: #0d1117;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  padding: 12px 16px;
  margin: 0 0 12px;
  overflow-x: auto;
  white-space: pre;
}

.sig-fn {
  color: var(--tok-fn);
}

.sig-param {
  color: var(--tok-builtin);
}

.sig-default {
  color: var(--tok-num);
}

.sig-type {
  color: var(--green);
}

.sig-arrow,
.sig-punc,
.sig-muted {
  color: var(--muted);
  font-weight: 500;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin: 32px 0;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
}

.card h3 {
  margin-top: 0;
  font-size: 1.05rem;
}

.card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

section {
  padding: 24px 0 40px;
}

section h2 {
  font-size: 1.5rem;
  margin-bottom: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

section h2:first-of-type {
  border-top: none;
  padding-top: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.95rem;
}

th,
td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
}

th {
  background: var(--panel);
}

td {
  color: var(--muted);
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.badge {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 0.82rem;
  color: var(--orange);
  background: rgba(255, 166, 87, 0.08);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0 48px;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer .links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 12px;
}

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--panel);
  border: 1px solid var(--green);
  color: var(--green);
  padding: 12px 18px;
  border-radius: 10px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
  z-index: 100;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 640px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  nav {
    gap: 12px;
  }
}