:root {
  color-scheme: light dark;
  --bg: #07111f;
  --panel: #0e1b2d;
  --panel-soft: #12243a;
  --text: #eef7ff;
  --muted: #a7b8ca;
  --line: #26425f;
  --accent: #1ed7ef;
  --accent-2: #19c8aa;
  --warning: #ffb547;
  --max: 1040px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(30, 215, 239, 0.18), transparent 28rem),
    linear-gradient(145deg, #06101d 0%, #07111f 44%, #0b1422 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

a:hover,
a:focus-visible {
  color: #7cecff;
}

.wrap {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(7, 17, 31, 0.88);
}

.header-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: end;
  padding: 64px 0 36px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-2);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.2;
}

h1 {
  margin: 0;
  font-size: clamp(2.25rem, 7vw, 5rem);
  letter-spacing: 0;
}

.subtitle {
  max-width: 680px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.1rem;
}

.quick-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
  max-width: 360px;
}

.quick-nav a,
.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 14px;
  background: rgba(18, 36, 58, 0.72);
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.quick-nav a:hover,
.quick-nav a:focus-visible,
.button:hover,
.button:focus-visible {
  border-color: var(--accent);
  background: rgba(30, 215, 239, 0.14);
}

main {
  padding: 34px 0 64px;
}

section {
  padding: 30px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.notice,
.contact-box {
  margin: 20px 0 10px;
  border: 1px solid rgba(30, 215, 239, 0.32);
  border-radius: 8px;
  padding: 24px;
  background: rgba(18, 36, 58, 0.66);
}

h2 {
  margin: 0 0 16px;
  font-size: clamp(1.35rem, 3vw, 2rem);
}

h3 {
  margin: 26px 0 8px;
  color: #d8f8ff;
  font-size: 1.05rem;
}

p {
  margin: 0 0 14px;
}

ul {
  margin: 0 0 18px;
  padding-left: 1.25rem;
}

li + li {
  margin-top: 6px;
}

address {
  margin: 12px 0 18px;
  padding: 18px;
  border-left: 4px solid var(--accent);
  background: rgba(255, 255, 255, 0.04);
  font-style: normal;
}

code {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.12em 0.34em;
  background: rgba(255, 255, 255, 0.06);
  color: #d8f8ff;
}

.updated {
  color: var(--warning);
  font-weight: 800;
}

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: #050c16;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px 0;
  color: var(--muted);
}

.footer-grid p {
  margin: 0;
}

@media (max-width: 760px) {
  .header-grid {
    grid-template-columns: 1fr;
    padding-top: 42px;
  }

  .quick-nav {
    justify-content: flex-start;
  }

  .quick-nav a {
    flex: 1 1 140px;
  }

  .footer-grid {
    flex-direction: column;
  }
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7fbff;
    --panel: #ffffff;
    --panel-soft: #edf7fb;
    --text: #162233;
    --muted: #526274;
    --line: #c8d9e6;
    --accent: #047c95;
    --accent-2: #07856f;
  }

  body {
    background:
      radial-gradient(circle at top left, rgba(30, 215, 239, 0.16), transparent 28rem),
      linear-gradient(145deg, #f7fbff 0%, #eef7fb 100%);
  }

  .site-header,
  .site-footer {
    background: rgba(247, 251, 255, 0.92);
  }

  h3,
  code {
    color: #0b5263;
  }
}