:root {
  --bg: #0F0F0F;
  --surface: #1A1A2E;
  --border: #2A2A4A;
  --primary: #7C7CFF;
  --accent: #00D4AA;
  --text: #EAEAEA;
  --text-muted: #999999;
  --error: #FF7C7C;
  --max-width: 760px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a:hover { text-decoration: underline; }

header {
  border-bottom: 1px solid var(--border);
  padding: 20px 24px;
  background: var(--surface);
}

header .inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

header .brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
}

header nav a {
  margin-left: 20px;
  color: var(--text-muted);
  font-size: 14px;
}

header nav a:hover { color: var(--text); text-decoration: none; }

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.hero {
  text-align: center;
  padding: 40px 0 32px;
}

.hero .icon {
  width: 120px;
  height: 120px;
  border-radius: 26px;
  display: block;
  margin: 0 auto 24px;
  box-shadow: 0 12px 48px rgba(124, 124, 255, 0.25);
}

header .brand-logo {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  vertical-align: middle;
  margin-right: 10px;
}

.hero h1 {
  font-size: 40px;
  margin: 0 0 12px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.hero p.tagline {
  font-size: 18px;
  color: var(--text-muted);
  margin: 0 0 32px;
}

.badges {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 16px;
}

.badge {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 48px 0 0;
}

.features .feature.featured {
  grid-column: 1 / -1;
}

.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: inherit;
  width: 100%;
  transition: border-color 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}

.feature:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.feature:focus-visible {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124, 124, 255, 0.35);
}

.feature.active {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(124, 124, 255, 0.25);
}

.feature .emoji {
  font-size: 24px;
  margin-bottom: 8px;
}

.feature h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--text);
}

.feature p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
}

@media (max-width: 520px) {
  .features { grid-template-columns: 1fr; }
}

.doc h1 {
  font-size: 32px;
  margin: 0 0 8px;
  letter-spacing: -0.3px;
}

.doc .updated {
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 32px;
}

.doc h2 {
  font-size: 20px;
  margin: 32px 0 12px;
  color: var(--text);
  letter-spacing: -0.2px;
}

.doc h3 {
  font-size: 16px;
  margin: 20px 0 8px;
  color: var(--text);
}

.doc p, .doc li {
  color: var(--text);
  font-size: 15px;
}

.doc ul { padding-left: 22px; }

.doc li { margin-bottom: 6px; }

.doc strong { color: var(--text); }

.callout {
  background: var(--surface);
  border-left: 3px solid var(--primary);
  padding: 16px 20px;
  margin: 20px 0;
  border-radius: 4px;
}

.deep-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  margin: 48px 0;
}

.deep-section .eyebrow {
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 0 0 8px;
}

.deep-section h2 {
  font-size: 28px;
  margin: 0 0 12px;
  letter-spacing: -0.4px;
}

.deep-section > p {
  color: var(--text-muted);
  font-size: 16px;
  margin: 0 0 24px;
}

.steps {
  display: grid;
  gap: 16px;
}

.step {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 14px;
  align-items: start;
}

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #0F0F0F;
  font-weight: 800;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step h3 {
  margin: 4px 0 4px;
  font-size: 16px;
  color: var(--text);
}

.step p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.5;
}

.callout p { margin: 0; }

footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

footer a { color: var(--text-muted); margin: 0 8px; }
footer a:hover { color: var(--text); text-decoration: none; }

@media (max-width: 520px) {
  .hero h1 { font-size: 32px; }
  .hero p.tagline { font-size: 16px; }
  main { padding: 32px 20px 48px; }
  header nav a { margin-left: 12px; }
}