:root {
  --bg: #0f1223;
  --panel: #141938;
  --ink: #e9ecff;
  --muted: #b6b9d8;
  --accent: #84a6ff;
  --accent-2: #9ef0ff;
  --card: #0c102a;
  --ok: #8af1c4;
  --warn: #ffd580;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  background: var(--bg);
  color: var(--ink);
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.55;
}

a {
  color: inherit;
}

.page {
  display: grid;
  grid-template-columns: minmax(220px, 260px) minmax(0, 1fr);
  min-height: 100vh;
}

.side-panel {
  background: var(--panel);
  border-right: 1px solid #1f2452;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}

.side-panel .home-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-2);
  text-decoration: none;
  font-weight: 600;
}

.side-panel .panel-title {
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.side-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.side-nav a {
  display: block;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--ink);
  text-decoration: none;
  font-size: 0.92rem;
  transition: background 0.2s ease;
}

.side-nav a:hover,
.side-nav a:focus {
  background: rgba(132, 166, 255, 0.18);
  outline: none;
}

.main-column {
  min-width: 0;
}

.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 24px;
}

header.hero {
  background: radial-gradient(1200px 600px at 15% -10%, rgba(132, 166, 255, 0.25), transparent 50%),
              radial-gradient(1000px 500px at 85% 10%, rgba(158, 240, 255, 0.18), transparent 50%);
  padding: 72px 24px 36px;
  border-radius: 0 0 var(--radius) var(--radius);
}

.kicker {
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  font-weight: 600;
  font-size: 0.82rem;
}

h1 {
  font-size: clamp(1.8rem, 2.6vw + 1rem, 3rem);
  margin: 0.25rem 0 0;
}

.sub {
  color: var(--muted);
  max-width: 68ch;
  margin-top: 0.5rem;
}

.meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 6px;
}

.byline {
  font-weight: 600;
  color: #dbe0ff;
}

.pill {
  border: 1px solid #2a2f5d;
  padding: 0.28rem 0.6rem;
  border-radius: 999px;
}

.cta-row {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #06122a;
  border: none;
  padding: 12px 16px;
  border-radius: 12px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: var(--shadow);
}

.btn.secondary {
  background: #20264d;
  color: var(--ink);
}

main {
  margin-top: 36px;
}

section {
  background: var(--panel);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

h2 {
  font-size: 1.35rem;
  margin: 0 0 12px;
}

p {
  margin: 0 0 12px;
}

ul {
  margin: 0 0 8px 1.2rem;
}

ol {
  margin: 0 0 8px 1.2rem;
}

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

.grid {
  display: grid;
  gap: 18px;
}

.grid.cols-2 {
  grid-template-columns: 1.1fr 1fr;
}

@media (max-width: 900px) {
  .grid.cols-2 {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--card);
  border: 1px solid #23284f;
  padding: 18px;
  border-radius: 14px;
}

.two-col {
  display: grid;
  gap: 14px;
}

@media (min-width: 800px) {
  .two-col {
    grid-template-columns: 1fr 1fr;
  }
}

.muted {
  color: var(--muted);
}

.callout {
  border-left: 3px solid var(--accent);
  padding-left: 12px;
}

.table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  border-radius: 12px;
  border: 1px solid #23284f;
}

.table th,
.table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

.table thead th {
  background: #1a2150;
  color: #dfe6ff;
  font-size: 0.92rem;
}

.table tbody tr:nth-child(even) {
  background: #121737;
}

figure {
  margin: 0;
  background: #0a0e23;
  border: 1px dashed #2f3570;
  border-radius: 12px;
  display: grid;
  place-items: center;
  min-height: 220px;
  position: relative;
}

figure img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
}

figcaption {
  position: absolute;
  inset: auto 12px 10px 12px;
  color: var(--muted);
  font-size: 0.88rem;
}

.placeholder {
  color: #7e86c9;
  padding: 28px;
  text-align: center;
}

.svg-wrap {
  background: #0c102a;
  border: 1px solid #23284f;
  border-radius: 12px;
  padding: 10px;
}

.foot {
  color: #9aa3d3;
  font-size: 0.85rem;
  text-align: center;
  margin: 28px 0 12px;
}

.badge {
  display: inline-block;
  font-size: 0.74rem;
  padding: 0.2rem 0.5rem;
  color: #06122a;
  background: var(--ok);
  border-radius: 999px;
  font-weight: 700;
}

.small {
  font-size: 0.9rem;
}

.disclaimer {
  font-size: 0.82rem;
  color: #9aa3d3;
}

pre {
  background: #0c102a;
  border: 1px solid #23284f;
  padding: 12px;
  border-radius: 10px;
  overflow: auto;
}

a.inline {
  color: var(--accent-2);
  text-underline-offset: 3px;
}

@media (max-width: 900px) {
  .page {
    grid-template-columns: 1fr;
  }

  .side-panel {
    position: relative;
    height: auto;
    border-right: none;
    border-bottom: 1px solid #1f2452;
  }

  .side-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
  }

  .side-nav a {
    flex: 1 1 auto;
    padding: 10px 12px;
  }
}