:root {
  color-scheme: dark;
  --bg: #050505;
  --screen: #090909;
  --surface: #101010;
  --surface-2: #171717;
  --surface-3: #1d1d1d;
  --border-soft: #242424;
  --border: #303030;
  --border-strong: #3a3a3a;
  --text: #f4f4f4;
  --text-2: #b8b8b8;
  --text-3: #8e8e8e;
  --accent: #7f9bb4;
  --accent-strong: #9fc2dc;
  --blue: #003a70;
  --red: #c00000;
  --danger: #e07979;
  --warning: #e2bb6e;
  --success: #8fd2a6;
  --shadow: 0 28px 100px rgba(0, 0, 0, .45);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--bg); scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 0%, rgba(0, 58, 112, .28), transparent 34rem),
    radial-gradient(circle at 92% 12%, rgba(127, 155, 180, .10), transparent 25rem),
    linear-gradient(180deg, #050505 0%, #090909 45%, #050505 100%);
  color: var(--text);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--accent-strong);
  outline-offset: 3px;
  border-radius: 10px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 20;
  padding: 12px 16px;
  background: var(--text);
  color: #050505;
  border-radius: 999px;
  transition: top .16s ease;
}
.skip-link:focus { top: 16px; }

.page {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 56px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px 0 36px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  min-height: 48px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background:
    linear-gradient(135deg, rgba(0, 58, 112, .95), rgba(16, 16, 16, .95)),
    var(--surface);
  border: 1px solid rgba(159, 194, 220, .28);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.04);
  color: var(--text);
  font-weight: 800;
  letter-spacing: -.05em;
}

.brand-text { display: grid; gap: 2px; }
.brand-name { font-weight: 800; letter-spacing: -.03em; line-height: 1.05; }
.brand-sub { color: var(--text-3); font-size: 13px; }

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}
.nav a {
  text-decoration: none;
  color: var(--text-2);
  border: 1px solid var(--border-soft);
  background: rgba(16, 16, 16, .68);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 14px;
  transition: border-color .16s ease, color .16s ease, background .16s ease;
}
.nav a:hover, .nav a[aria-current="page"] {
  color: var(--text);
  border-color: rgba(159, 194, 220, .48);
  background: rgba(29, 29, 29, .92);
}

.hero {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(23,23,23,.92), rgba(16,16,16,.92));
  border-radius: var(--radius-xl);
  padding: clamp(28px, 6vw, 64px);
  box-shadow: var(--shadow);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 168px;
  height: 4px;
  background: linear-gradient(90deg, var(--blue), var(--accent-strong));
}
.hero::after {
  content: "";
  position: absolute;
  right: 34px;
  top: 34px;
  width: 46px;
  height: 46px;
  border-top: 2px solid rgba(159,194,220,.5);
  border-right: 2px solid rgba(159,194,220,.5);
  border-radius: 0 12px 0 0;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--accent-strong);
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: 12px;
  font-weight: 800;
}

h1, h2, h3 { margin: 0; letter-spacing: -.04em; }
h1 {
  max-width: 900px;
  font-size: clamp(38px, 6vw, 72px);
  line-height: .95;
}
.hero-lead {
  max-width: 820px;
  margin: 22px 0 0;
  color: var(--text-2);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.55;
}
.notice {
  margin-top: 26px;
  display: grid;
  gap: 10px;
  max-width: 900px;
  padding: 18px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(224, 121, 121, .32);
  background: rgba(192, 0, 0, .08);
}
.notice strong { color: #ffd0d0; }
.notice p { margin: 0; color: var(--text-2); line-height: 1.55; }

.meta-row {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--text-3);
  font-size: 14px;
}
.pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  background: rgba(5, 5, 5, .42);
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 18px;
}
.card {
  position: relative;
  display: block;
  min-height: 196px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: rgba(16, 16, 16, .78);
  text-decoration: none;
  transition: transform .16s ease, border-color .16s ease, background .16s ease;
}
.card:hover {
  transform: translateY(-2px);
  border-color: rgba(159, 194, 220, .48);
  background: rgba(23, 23, 23, .95);
}
.card .tag { color: var(--text-3); font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; }
.card h2 { margin-top: 14px; font-size: 22px; }
.card p { margin: 12px 0 0; color: var(--text-2); line-height: 1.55; }
.card .arrow { position: absolute; bottom: 20px; right: 22px; color: var(--accent-strong); }

.main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 22px;
  align-items: start;
  margin-top: 22px;
}
.content {
  display: grid;
  gap: 16px;
}
.section {
  border: 1px solid var(--border);
  background: rgba(16, 16, 16, .78);
  border-radius: var(--radius-lg);
  padding: clamp(22px, 4vw, 34px);
}
.section h2 { font-size: clamp(24px, 3vw, 34px); }
.section h3 { margin-top: 22px; font-size: 18px; }
.section p, .section li { color: var(--text-2); line-height: 1.72; }
.section p { margin: 14px 0 0; }
.section ul, .section ol { margin: 14px 0 0; padding-left: 22px; }
.section li + li { margin-top: 8px; }
.section strong { color: var(--text); }
.section code {
  color: var(--accent-strong);
  background: rgba(127,155,180,.12);
  border: 1px solid rgba(127,155,180,.24);
  padding: 2px 6px;
  border-radius: 7px;
}
.callout {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid rgba(159,194,220,.28);
  border-radius: var(--radius-md);
  background: rgba(0,58,112,.15);
}
.callout p { margin: 0; }

.side {
  position: sticky;
  top: 16px;
  display: grid;
  gap: 14px;
}
.side-card {
  border: 1px solid var(--border);
  background: rgba(16, 16, 16, .8);
  border-radius: var(--radius-lg);
  padding: 20px;
}
.side-card h2 { font-size: 17px; letter-spacing: -.02em; }
.side-card p { margin: 10px 0 0; color: var(--text-2); line-height: 1.6; font-size: 14px; }
.side-card a { color: var(--accent-strong); text-decoration: none; }
.side-card a:hover { text-decoration: underline; }
.toc { display: grid; gap: 8px; margin-top: 12px; }
.toc a { color: var(--text-2); text-decoration: none; font-size: 14px; }
.toc a:hover { color: var(--text); }

.kv {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 8px 18px;
  margin-top: 16px;
  color: var(--text-2);
  line-height: 1.6;
}
.kv div:nth-child(odd) { color: var(--text); font-weight: 700; }

.footer {
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--border-soft);
  color: var(--text-3);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  font-size: 14px;
}
.footer a { color: var(--text-2); text-decoration: none; }
.footer a:hover { color: var(--text); }

.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 800;
  border: 1px solid rgba(159,194,220,.34);
  background: rgba(127,155,180,.18);
  color: var(--text);
}
.button.secondary { background: transparent; color: var(--text-2); border-color: var(--border-strong); }

.status-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 22px;
}
.status {
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  background: rgba(23, 23, 23, .72);
}
.status strong { display: block; margin-bottom: 6px; }
.status span { color: var(--text-2); font-size: 14px; line-height: 1.45; }

@media (max-width: 920px) {
  .topbar { align-items: flex-start; flex-direction: column; }
  .nav { justify-content: flex-start; }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .main { grid-template-columns: 1fr; }
  .side { position: static; }
  .status-list { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .page { width: min(100% - 22px, 1120px); padding-top: 14px; }
  .hero { padding: 28px 20px; border-radius: 22px; }
  .grid { grid-template-columns: 1fr; }
  .card { min-height: 164px; }
  .kv { grid-template-columns: 1fr; }
  .footer { display: grid; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}