:root {
  --bg: #08131f;
  --surface: rgba(255, 255, 255, 0.075);
  --surface-soft: rgba(255, 255, 255, 0.045);
  --text: rgba(247, 250, 252, 0.96);
  --muted: rgba(231, 239, 246, 0.72);
  --muted-2: rgba(231, 239, 246, 0.54);
  --border: rgba(124, 224, 218, 0.18);
  --accent: #7ce0da;
  --accent-2: #e6b96e;
  --danger: #ffb3a7;
  --shadow: 0 22px 64px rgba(0, 0, 0, 0.42);
  --radius: 24px;
  --radius-small: 16px;
  --max: 1040px;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f8fb;
    --surface: rgba(255, 255, 255, 0.9);
    --surface-soft: rgba(25, 59, 95, 0.05);
    --text: #111827;
    --muted: #586474;
    --muted-2: #788494;
    --border: #d7e4ea;
    --accent: #15556f;
    --accent-2: #a86f16;
    --danger: #9f2d20;
    --shadow: 0 20px 60px rgba(21, 53, 83, 0.11);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  color: var(--text);
  background:
    radial-gradient(1100px 680px at 10% -12%, rgba(124, 224, 218, 0.23), transparent 58%),
    radial-gradient(850px 560px at 96% 0%, rgba(230, 185, 110, 0.18), transparent 52%),
    radial-gradient(900px 680px at 52% 116%, rgba(40, 140, 153, 0.15), transparent 56%),
    var(--bg);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
p, li { color: var(--muted); line-height: 1.68; }
li { margin: 7px 0; }
ul { margin: 9px 0 0 20px; padding: 0; }
h1, h2, h3 { color: var(--text); letter-spacing: -0.025em; }
h1 { margin: 0 0 10px; font-size: clamp(2rem, 5vw, 2.65rem); line-height: 1.08; }
h2 { margin: 30px 0 10px; font-size: 1.18rem; }
h3 { margin: 18px 0 8px; font-size: 0.98rem; }
strong, b { color: var(--text); }

.wrap { max-width: var(--max); margin: 0 auto; padding: 26px 18px 64px; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(8, 19, 31, 0.84), rgba(8, 19, 31, 0.18));
  border-bottom: 1px solid rgba(124, 224, 218, 0.1);
}
.topbar .wrap { padding-top: 13px; padding-bottom: 13px; }
.brand { display: flex; align-items: center; gap: 11px; min-height: 30px; }
.brand-mark {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 30px rgba(124, 224, 218, 0.25);
  flex: 0 0 auto;
}
.brand-copy { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.brand-copy strong { font-weight: 760; }
.brand-copy span { color: var(--muted-2); font-size: 0.82rem; }
.brand-home { margin-left: auto; font-size: 0.85rem; color: var(--muted); }

.hero { padding: 26px 0 12px; }
.hero > p { max-width: 790px; margin: 14px 0 0; }
.meta { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 14px; }
.pill {
  font-size: 0.76rem;
  color: var(--muted);
  background: var(--surface-soft);
  border: 1px solid var(--border);
  padding: 7px 10px;
  border-radius: 999px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.layout { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 960px) {
  .layout { grid-template-columns: 272px minmax(0, 1fr); align-items: start; }
  .toc { position: sticky; top: 78px; }
}
.toc { padding: 16px; }
.toc h2 { margin: 0 0 10px; font-size: 0.9rem; }
.toc a {
  display: block;
  padding: 8px 10px;
  border-radius: 11px;
  color: var(--muted);
  border: 1px solid transparent;
  font-size: 0.92rem;
}
.toc a:hover { background: var(--surface-soft); border-color: var(--border); color: var(--text); text-decoration: none; }
.toc small { display: block; color: var(--muted-2); line-height: 1.45; margin: 11px 2px 0; }
.content { padding: 20px 20px 10px; overflow: hidden; }
.section { padding: 0 0 17px; margin-top: 20px; border-top: 1px solid rgba(124, 224, 218, 0.11); }
.section:first-child { margin-top: 0; border-top: 0; }
.section h2 { scroll-margin-top: 92px; }
.grid { display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 13px; }
@media (min-width: 720px) { .grid.two { grid-template-columns: 1fr 1fr; } }
.box, .notice {
  padding: 14px;
  border-radius: var(--radius-small);
  border: 1px solid var(--border);
  background: var(--surface-soft);
}
.box > b { display: block; margin-bottom: 4px; }
.notice { margin-top: 14px; }
.notice.warning { border-color: color-mix(in srgb, var(--danger) 42%, transparent); }
.notice p { margin: 0; }
.footer { padding: 16px 19px; margin-top: 16px; color: var(--muted-2); font-size: 0.82rem; line-height: 1.55; }

.home-main { max-width: 880px; margin: 0 auto; padding: 48px 20px 76px; }
.home-card { padding: 26px; }
.home-card h1 { font-size: clamp(2rem, 7vw, 2.8rem); }
.home-links { display: grid; gap: 12px; margin-top: 22px; }
.home-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 17px;
  border-radius: 17px;
  border: 1px solid var(--border);
  background: var(--surface-soft);
  font-weight: 720;
}
.home-link span { color: var(--muted-2); font-weight: 500; font-size: 0.86rem; }
.home-link:hover { text-decoration: none; background: color-mix(in srgb, var(--surface-soft) 80%, var(--accent) 6%); }
.home-meta { margin-top: 20px; color: var(--muted); font-size: 0.88rem; line-height: 1.7; }

@media (prefers-color-scheme: light) {
  .topbar {
    background: linear-gradient(to bottom, rgba(245, 248, 251, 0.94), rgba(245, 248, 251, 0.3));
    border-bottom-color: rgba(21, 85, 111, 0.1);
  }
  .section { border-top-color: rgba(21, 85, 111, 0.09); }
}

@media print {
  body { background: #fff; color: #000; }
  .topbar { position: static; background: none; border: 0; }
  .toc { display: none; }
  .layout { display: block; }
  .card { box-shadow: none; background: #fff; border-color: #ddd; }
  a { color: #000; text-decoration: underline; }
  p, li { color: #222; }
}