:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #07090d;
  color: #f5f7fa;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 50% -10%, rgba(0, 213, 255, 0.18), transparent 34rem),
    #07090d;
  line-height: 1.65;
}

a {
  color: #39dcff;
}

a:hover {
  color: #8bebff;
}

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  padding: 28px 0 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 900;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(57, 220, 255, 0.45);
  border-radius: 14px;
  background: rgba(57, 220, 255, 0.12);
  color: #39dcff;
  box-shadow: 0 0 28px rgba(57, 220, 255, 0.18);
}

.card {
  margin-bottom: 36px;
  padding: clamp(24px, 5vw, 54px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 28px;
  background: rgba(18, 21, 27, 0.92);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

.eyebrow {
  margin: 0 0 10px;
  color: #39dcff;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  margin: 0 0 14px;
  font-size: clamp(2.05rem, 7vw, 4.25rem);
  letter-spacing: -0.045em;
}

h2 {
  margin: 38px 0 12px;
  font-size: clamp(1.25rem, 3vw, 1.65rem);
}

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

p,
li {
  color: #cbd1da;
}

.lead {
  max-width: 720px;
  margin: 0;
  color: #e4e8ee;
  font-size: 1.08rem;
}

.meta {
  margin-top: 20px;
  color: #8e98a7;
  font-size: 0.9rem;
}

.notice {
  margin: 26px 0;
  padding: 18px 20px;
  border: 1px solid rgba(57, 220, 255, 0.3);
  border-radius: 18px;
  background: rgba(57, 220, 255, 0.08);
}

.warning {
  border-color: rgba(255, 197, 61, 0.38);
  background: rgba(255, 197, 61, 0.08);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin-top: 30px;
}

.link-card {
  display: block;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.035);
  color: #fff;
  text-decoration: none;
}

.link-card:hover {
  border-color: rgba(57, 220, 255, 0.45);
  background: rgba(57, 220, 255, 0.08);
}

.link-card strong,
.link-card span {
  display: block;
}

.link-card span {
  margin-top: 8px;
  color: #9ea7b4;
  font-size: 0.9rem;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  margin-top: 12px;
  padding: 0 22px;
  border-radius: 15px;
  background: #39dcff;
  color: #031015;
  font-weight: 900;
  text-decoration: none;
}

.button:hover {
  background: #8bebff;
  color: #031015;
}

.site-footer {
  padding: 0 0 42px;
  color: #778291;
  font-size: 0.85rem;
  text-align: center;
}

code {
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

@media (max-width: 540px) {
  .shell {
    width: min(100% - 20px, 920px);
  }

  .card {
    border-radius: 22px;
  }
}