:root {
  --bg: #0b1020;
  --bg-elevated: #121a31;
  --panel: #16213f;
  --text: #eef2ff;
  --muted: #a8b3d1;
  --line: rgba(255, 255, 255, 0.1);
  --brand: #7c9cff;
  --brand-strong: #5b7cfa;
  --ok: #3dd68c;
  --warning: #f5c451;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  --radius: 18px;
  --max: 1040px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(124, 156, 255, 0.22), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(61, 214, 140, 0.12), transparent 45%),
    var(--bg);
  line-height: 1.6;
  min-height: 100vh;
}

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

.container {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(11, 16, 32, 0.75);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--brand), #8b5cf6);
  box-shadow: 0 8px 20px rgba(91, 124, 250, 0.35);
  font-size: 0.95rem;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.1rem;
  align-items: center;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 999px;
  padding: 0.75rem 1.15rem;
  border: 1px solid transparent;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-strong));
  color: white;
  box-shadow: 0 10px 24px rgba(91, 124, 250, 0.28);
}
.btn-secondary {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}

.hero {
  padding: 4.5rem 0 2.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 1rem;
  background: rgba(255,255,255,0.03);
}

h1, h2, h3 { line-height: 1.15; margin: 0 0 0.8rem; }
h1 { font-size: clamp(2.2rem, 4vw, 3.3rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1rem; color: var(--muted); }

.lead {
  font-size: 1.12rem;
  max-width: 40rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.4rem 0 1rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.chip {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.03);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.35rem 0.7rem;
  font-size: 0.85rem;
}

.panel {
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
}

.panel-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.8rem;
}

.fake-ui {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.fake-ui-bar {
  display: flex;
  gap: 0.35rem;
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--line);
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #334;
}
.dot:nth-child(1) { background: #ff5f57; }
.dot:nth-child(2) { background: #febc2e; }
.dot:nth-child(3) { background: #28c840; }

.fake-ui-body { padding: 1rem; }
.toolbar-demo {
  display: inline-flex;
  gap: 0.35rem;
  padding: 0.35rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  margin-bottom: 0.9rem;
}
.toolbar-demo span {
  font-size: 0.75rem;
  padding: 0.35rem 0.55rem;
  border-radius: 8px;
  background: rgba(124,156,255,0.12);
  color: var(--text);
}
.sample-text {
  color: var(--text);
  font-size: 0.95rem;
  margin: 0;
}
.sample-text em {
  font-style: normal;
  background: rgba(124,156,255,0.18);
  border-radius: 4px;
  padding: 0 0.15rem;
}

.section {
  padding: 2.2rem 0;
}

.section-header {
  margin-bottom: 1.2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.15rem;
}

.card p { margin-bottom: 0; }
.card strong { color: var(--text); display: block; margin-bottom: 0.35rem; }

.list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}
.list li { margin: 0.35rem 0; }

.page {
  padding: 2.5rem 0 4rem;
}

.page-header {
  margin-bottom: 1.5rem;
}

.prose {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.4rem 1.5rem;
}

.prose h2 {
  margin-top: 1.6rem;
  font-size: 1.25rem;
}
.prose h2:first-child { margin-top: 0; }
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
}
.prose th, .prose td {
  border: 1px solid var(--line);
  padding: 0.55rem 0.65rem;
  text-align: left;
  vertical-align: top;
}
.prose th { background: rgba(255,255,255,0.04); color: var(--text); }
.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: rgba(124,156,255,0.12);
  padding: 0.1rem 0.35rem;
  border-radius: 6px;
}
.note {
  border-left: 3px solid var(--brand);
  background: rgba(124,156,255,0.08);
  padding: 0.8rem 1rem;
  border-radius: 0 10px 10px 0;
  color: var(--muted);
  margin: 1rem 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 2.2rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

@media (max-width: 860px) {
  .hero-grid,
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .hero { padding-top: 2.5rem; }
  .nav { flex-direction: column; align-items: flex-start; }
}