:root {
  --bg: #0b1120;
  --bg-alt: #020617;
  --fg: #e5e7eb;
  --fg-muted: #9ca3af;
  --accent: #38bdf8;
  --accent-soft: #0ea5e9;
  --border: #1f2937;
  --code-bg: #020617;
  --link: #38bdf8;
  --link-hover: #7dd3fc;
  --danger: #f97373;
  --shadow-soft: 0 18px 45px rgba(15,23,42,0.75);
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 999px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at top, #0f172a 0, #020617 55%, #000 100%);
  color: var(--fg);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
  text-rendering: geometricPrecision;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.site-shell {
  max-width: 1120px;
  margin: 32px auto 48px auto;
  padding: 0 20px 40px 20px;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-xl);
  background: conic-gradient(from 160deg, #22c1c3, #38bdf8, #6366f1, #22c1c3);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 18px rgba(56,189,248,0.65);
}

.brand-mark span {
  font-size: 15px;
  font-weight: 800;
  color: #0b1120;
}

.brand-text-primary {
  font-weight: 600;
  letter-spacing: 0.08em;
  font-size: 13px;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.brand-text-secondary {
  font-size: 13px;
  color: var(--fg-muted);
}

.main-nav {
  display: flex;
  gap: 16px;
  font-size: 14px;
}

.main-nav a {
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
}
.main-nav a:hover {
  border-color: rgba(148,163,184,0.4);
  background: radial-gradient(circle at top left, rgba(37,99,235,0.18), transparent 65%);
  text-decoration: none;
}

.hero {
  border-radius: 26px;
  padding: 28px 26px 26px 26px;
  background:
    radial-gradient(circle at top left, rgba(59,130,246,0.35), transparent 60%),
    radial-gradient(circle at bottom right, rgba(8,47,73,0.9), #020617);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(148,163,184,0.28);
  margin-bottom: 24px;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-muted);
  border-radius: 999px;
  border: 1px solid rgba(148,163,184,0.35);
  padding: 4px 10px;
  margin-bottom: 14px;
  background: rgba(15,23,42,0.85);
}

.hero-kicker span {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: #22c55e;
  box-shadow: 0 0 12px rgba(34,197,94,0.9);
}

.hero-mainline {
  font-size: 26px;
  line-height: 1.25;
  font-weight: 570;
  letter-spacing: 0.01em;
  margin-bottom: 8px;
}

.hero-subline {
  font-size: 14px;
  color: var(--fg-muted);
  max-width: 640px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 13px;
  cursor: pointer;
  background: transparent;
  color: var(--fg);
}

.btn-primary {
  background: linear-gradient(135deg, #38bdf8, #6366f1);
  color: #020617;
  font-weight: 600;
  box-shadow: 0 16px 40px rgba(56,189,248,0.5);
}
.btn-primary:hover {
  filter: brightness(1.05);
  text-decoration: none;
}

.btn-ghost {
  border-color: rgba(148,163,184,0.4);
  background: rgba(15,23,42,0.85);
}
.btn-ghost:hover {
  border-color: rgba(148,163,184,0.8);
  text-decoration: none;
}

.layout-grid {
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(0, 1.6fr);
  gap: 18px;
  margin-top: 22px;
}

.panel {
  border-radius: 20px;
  border: 1px solid rgba(148,163,184,0.26);
  background: radial-gradient(circle at top, rgba(15,23,42,0.96), #020617 60%);
  padding: 18px 18px 16px 18px;
}

.panel h2 {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-top: 0;
  margin-bottom: 10px;
}

.panel p {
  font-size: 13px;
  color: var(--fg-muted);
  margin: 0 0 10px 0;
}

.kv-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 13px;
}
.kv-list li {
  display: flex;
  justify-content: space-between;
  border-top: 1px dashed rgba(75,85,99,0.7);
  padding: 7px 0;
}
.kv-list li:first-child {
  border-top: none;
}
.kv-key {
  color: var(--fg-muted);
}
.kv-value {
  color: var(--fg);
  font-variant-numeric: tabular-nums;
}

.footer {
  margin-top: 24px;
  padding-top: 12px;
  border-top: 1px solid rgba(31,41,55,0.85);
  font-size: 11px;
  color: var(--fg-muted);
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid rgba(148,163,184,0.4);
  font-size: 11px;
  color: var(--fg-muted);
}

@media (max-width: 840px) {
  .site-shell {
    margin-top: 20px;
  }
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .layout-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}


.spec-body {
  font-size: 14px;
  line-height: 1.6;
  color: var(--fg-muted);
}

.spec-body h1,
.spec-body h2,
.spec-body h3,
.spec-body h4 {
  color: var(--fg);
  margin-top: 1.6em;
  margin-bottom: 0.4em;
}

.spec-body h1 {
  font-size: 22px;
}

.spec-body h2 {
  font-size: 18px;
}

.spec-body h3 {
  font-size: 15px;
  text-transform: none;
  letter-spacing: 0.02em;
}

.spec-body p {
  margin: 0.4em 0 0.6em 0;
}

.spec-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 13px;
  background: var(--code-bg);
  padding: 1px 4px;
  border-radius: 4px;
}

.spec-body pre {
  background: var(--code-bg);
  padding: 10px 12px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 13px;
}