@import url('https://fonts.googleapis.com/css2?family=Sora:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --bg: #07121a;
  --bg2: #0d1d28;
  --panel: rgba(13, 29, 40, 0.92);
  --border: rgba(125, 227, 255, 0.14);
  --border-strong: rgba(125, 227, 255, 0.26);
  --text: #eaf7ff;
  --muted: #9ab8c8;
  --cyan: #59d6ff;
  --mint: #74f2c8;
  --orange: #ffb36a;
  --violet: #b79bff;
  --code-bg: #061018;
  --sans: 'Sora', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', 'Cascadia Code', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  display: flex;
  color: var(--text);
  font-family: var(--sans);
  background:
    radial-gradient(circle at 88% -10%, rgba(89, 214, 255, 0.2), transparent 33%),
    radial-gradient(circle at 8% 8%, rgba(116, 242, 200, 0.12), transparent 30%),
    linear-gradient(180deg, #040b12, var(--bg) 34%, #06131d 100%);
}

.sidebar {
  width: 278px;
  min-width: 278px;
  height: 100vh;
  position: sticky;
  top: 0;
  overflow-y: auto;
  border-right: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(10, 23, 31, 0.98), rgba(6, 16, 23, 0.98));
  padding: 22px 0 40px;
}

.logo {
  padding: 0 22px 18px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.logo-title {
  color: var(--cyan);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.logo-sub {
  color: var(--muted);
  font-size: 11px;
  margin-top: 4px;
}

.nav-section { margin-bottom: 8px; }

.nav-label {
  padding: 9px 22px 4px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav-link {
  display: block;
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  padding: 7px 22px;
  border-left: 2px solid transparent;
  transition: color 0.16s ease, background 0.16s ease, border-color 0.16s ease;
}

.nav-link:hover {
  color: var(--text);
  background: rgba(89, 214, 255, 0.08);
}

.nav-link.active {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(89, 214, 255, 0.1);
}

.main {
  flex: 1;
  max-width: 980px;
  padding: 40px 48px 90px;
  overflow-x: hidden;
}

.hero {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--border-strong);
  padding: 28px 30px;
  margin-bottom: 30px;
  background:
    linear-gradient(130deg, rgba(89, 214, 255, 0.13), rgba(183, 155, 255, 0.08)),
    linear-gradient(180deg, rgba(10, 24, 34, 0.95), rgba(7, 18, 26, 0.96));
}

.hero::after {
  content: '';
  position: absolute;
  right: -56px;
  bottom: -72px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(116, 242, 200, 0.28), transparent 68%);
}

.hero-kicker {
  color: var(--mint);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 10px;
}

h1 {
  font-size: 31px;
  line-height: 1.22;
  margin-bottom: 10px;
}

.hero-sub {
  color: var(--muted);
  max-width: 800px;
  line-height: 1.72;
}

.hero-meta {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  border: 1px solid transparent;
}

.badge-cyan { color: var(--cyan); background: rgba(89, 214, 255, 0.12); border-color: rgba(89, 214, 255, 0.28); }
.badge-mint { color: var(--mint); background: rgba(116, 242, 200, 0.12); border-color: rgba(116, 242, 200, 0.24); }
.badge-orange { color: var(--orange); background: rgba(255, 179, 106, 0.12); border-color: rgba(255, 179, 106, 0.24); }
.badge-violet { color: var(--violet); background: rgba(183, 155, 255, 0.12); border-color: rgba(183, 155, 255, 0.24); }

section { margin-bottom: 58px; scroll-margin-top: 24px; }

h2 {
  margin: 34px 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  font-size: 22px;
}

h3 {
  margin: 20px 0 8px;
  font-size: 15px;
}

p {
  color: var(--muted);
  margin-bottom: 10px;
  line-height: 1.75;
  font-size: 14px;
}

p strong,
li strong {
  color: var(--text);
}

.card-grid {
  display: grid;
  gap: 14px;
}

.card-grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel);
  padding: 14px 14px;
}

.card-title {
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}

.card-body {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.bullet,
.ordered {
  margin: 8px 0 14px 20px;
  color: var(--muted);
}

.bullet li,
.ordered li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.callout {
  margin: 14px 0 18px;
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 12px 14px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: rgba(7, 20, 28, 0.88);
}

.callout-icon {
  width: 20px;
  height: 20px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 12px;
  flex-shrink: 0;
}

.callout.info .callout-icon { background: rgba(89, 214, 255, 0.2); color: var(--cyan); }
.callout.tip .callout-icon { background: rgba(116, 242, 200, 0.2); color: var(--mint); }
.callout.danger .callout-icon { background: rgba(255, 179, 106, 0.2); color: var(--orange); }

.callout-body {
  color: var(--muted);
  line-height: 1.7;
  font-size: 13px;
}

pre {
  margin: 12px 0;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--code-bg);
  padding: 16px 18px;
  overflow-x: auto;
}

code {
  font-family: var(--mono);
  font-size: 12.8px;
  line-height: 1.65;
}

p code,
li code {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--cyan);
}

.summary-note {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
}

@media (max-width: 1080px) {
  body { display: block; }
  .sidebar {
    width: 100%;
    min-width: 100%;
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    max-height: 46vh;
  }
  .main {
    max-width: 100%;
    padding: 28px 20px 76px;
  }
}