:root {
  color-scheme: dark;
  --bg: #020617;
  --panel: rgba(15, 23, 42, .82);
  --panel-strong: #0f172a;
  --text: #f8fafc;
  --muted: #94a3b8;
  --line: rgba(148, 163, 184, .22);
  --accent: #38bdf8;
  --accent-2: #a78bfa;
  --shadow: 0 24px 80px rgba(0, 0, 0, .38);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 20% 0%, rgba(56, 189, 248, .26), transparent 32rem),
    radial-gradient(circle at 80% 10%, rgba(167, 139, 250, .2), transparent 28rem),
    var(--bg);
  color: var(--text);
  line-height: 1.75;
}
a { color: inherit; }
.hero { min-height: 92vh; padding: 24px; }
.nav {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
}
.brand {
  font-size: 1.25rem;
  font-weight: 900;
  text-decoration: none;
  letter-spacing: .02em;
}
.nav-links { display: flex; gap: 18px; flex-wrap: wrap; }
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: .95rem;
}
.nav-links a:hover { color: var(--text); }
.hero-inner {
  max-width: 980px;
  margin: 90px auto 0;
  text-align: center;
}
.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: .78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .16em;
}
h1 {
  margin: 0;
  font-size: clamp(3.6rem, 12vw, 9rem);
  line-height: .92;
  letter-spacing: -.08em;
}
h1 span {
  display: block;
  margin-top: 16px;
  font-size: clamp(1.45rem, 4vw, 3.4rem);
  letter-spacing: -.04em;
}
.lead {
  max-width: 740px;
  margin: 26px auto 34px;
  color: #cbd5e1;
  font-size: clamp(1rem, 2vw, 1.25rem);
}
.copy-card {
  max-width: 540px;
  margin: 0 auto;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background: linear-gradient(180deg, rgba(15,23,42,.92), rgba(15,23,42,.68));
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}
.big-char {
  font-size: clamp(7rem, 22vw, 13rem);
  line-height: 1;
  font-weight: 900;
  text-shadow: 0 0 52px rgba(56, 189, 248, .35);
}
.copy-button {
  width: 100%;
  margin-top: 24px;
  border: 0;
  border-radius: 999px;
  padding: 18px 22px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #020617;
  font-weight: 900;
  font-size: 1.15rem;
  cursor: pointer;
  box-shadow: 0 18px 40px rgba(56, 189, 248, .28);
}
.copy-button:hover { transform: translateY(-1px); }
.status { min-height: 1.75em; margin: 14px 0 0; color: var(--muted); }
.quick-links {
  margin-top: 28px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}
.quick-links a {
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #cbd5e1;
  text-decoration: none;
  background: rgba(15,23,42,.55);
}
.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 72px 24px;
}
.section-header { margin-bottom: 26px; }
h2 {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 3.1rem);
  line-height: 1.15;
  letter-spacing: -.05em;
}
h3 { margin-top: 0; font-size: 1.25rem; }
.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.panel, .article, details {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  padding: 24px;
}
.inline-copy code {
  font-size: 3rem;
  margin-right: 10px;
}
.mini-copy, .example, .variant-list button {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(2, 6, 23, .56);
  color: var(--text);
  cursor: pointer;
}
.mini-copy { padding: 8px 13px; }
.info-list { margin: 0; }
.info-list div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}
.info-list div:last-child { border-bottom: 0; }
dt { color: var(--muted); }
dd { margin: 0; font-weight: 800; }
.examples, .variant-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.example {
  min-height: 90px;
  padding: 18px;
  font-size: 1rem;
  text-align: left;
}
.example:hover, .variant-list button:hover { border-color: rgba(56,189,248,.8); }
.note { color: var(--muted); }
.variant-list button {
  padding: 18px;
  text-align: center;
  border-radius: 20px;
}
.variant-list span {
  display: block;
  font-size: 2.3rem;
  font-weight: 900;
}
.variant-list small { color: var(--muted); }
.article-section { padding-top: 30px; }
details { margin-bottom: 12px; }
summary {
  cursor: pointer;
  font-weight: 800;
}
details p { color: #cbd5e1; }
.footer {
  padding: 42px 24px;
  border-top: 1px solid var(--line);
  text-align: center;
  color: var(--muted);
}
.footer a { color: var(--text); }
@media (max-width: 760px) {
  .hero { padding: 18px; }
  .nav { align-items: flex-start; }
  .nav-links { justify-content: flex-end; gap: 10px; font-size: .9rem; }
  .hero-inner { margin-top: 54px; }
  .copy-card { padding: 22px; border-radius: 24px; }
  .content-grid, .examples, .variant-list { grid-template-columns: 1fr; }
  .section { padding: 52px 18px; }
}