:root {
  --bg: #07090D;
  --bg-card: #0C1118;
  --border: rgba(255, 255, 255, 0.08);
  --text: #F1F5F9;
  --muted: #94A3B8;
  --dim: #64748B;
  --indigo: #6366F1;
  --indigo-soft: rgba(99, 102, 241, 0.18);
  --warn: #F59E0B;
  --warn-soft: rgba(245, 158, 11, 0.12);
  --danger: #EF4444;
}

* { box-sizing: border-box; }

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

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

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

header.top {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}

.logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--indigo), #818CF8);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.5px;
}

.brand {
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.3px;
}

.brand small {
  display: block;
  color: var(--dim);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-top: 2px;
}

nav.tabs {
  margin-left: auto;
  display: flex;
  gap: 4px;
  font-size: 13px;
}
nav.tabs a {
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-weight: 600;
}
nav.tabs a.active {
  background: var(--indigo-soft);
  color: var(--indigo);
}

h1 {
  font-size: 28px;
  margin: 0 0 6px;
  letter-spacing: -0.3px;
}
h2 {
  font-size: 17px;
  margin: 28px 0 8px;
  color: var(--text);
}
h3 {
  font-size: 14px;
  margin: 16px 0 6px;
  color: var(--muted);
  font-weight: 700;
}

p, li {
  color: var(--muted);
  line-height: 1.7;
}

.lead {
  color: var(--dim);
  font-size: 13px;
  letter-spacing: 0.2px;
}

.meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--dim);
  font-weight: 600;
  margin: 6px 0 24px;
}

.section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 22px;
  margin-bottom: 14px;
}

.warn {
  background: var(--warn-soft);
  border: 1px solid rgba(245, 158, 11, 0.35);
  border-radius: 14px;
  padding: 16px 20px;
  margin-bottom: 24px;
}
.warn h3 {
  color: var(--warn);
  margin: 0 0 6px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  font-size: 12px;
}
.warn p { color: var(--text); margin: 0; }

.contact {
  background: var(--bg-card);
  border: 1px solid var(--indigo-soft);
  border-radius: 14px;
  padding: 18px 22px;
  margin-top: 32px;
}
.contact h3 {
  color: var(--indigo);
  margin: 0 0 6px;
}
.contact p { margin: 4px 0; }

footer {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--dim);
}

.toc {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  margin-bottom: 28px;
}
.toc strong {
  display: block;
  color: var(--text);
  font-size: 12px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.toc ol {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  font-size: 13px;
}
.toc ol a { color: var(--muted); }
.toc ol a:hover { color: var(--indigo); }

ul.simple {
  padding-left: 18px;
}
ul.simple li {
  margin-bottom: 6px;
}

.cta-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 24px;
}
@media (max-width: 540px) {
  .cta-row { grid-template-columns: 1fr; }
}
.cta {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  display: block;
}
.cta:hover { border-color: var(--indigo); text-decoration: none; }
.cta h3 { color: var(--text); margin: 0 0 6px; font-size: 16px; }
.cta p { margin: 0; color: var(--dim); font-size: 13px; }

code.email {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 6px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px;
  color: var(--indigo);
}