:root {
  color-scheme: dark;
  --ink: #eefcf9;
  --muted: #a7c5c0;
  --surface: rgba(7, 39, 44, 0.86);
  --surface-strong: #092f35;
  --line: rgba(85, 229, 211, 0.2);
  --brand: #43dac8;
  --brand-strong: #18b9aa;
  --gold: #efc260;
  --danger: #ff8f9e;
  --max: 880px;
}
* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 0%, rgba(30, 191, 175, 0.18), transparent 36rem),
    linear-gradient(145deg, #001b22 0%, #031b22 48%, #071327 100%);
  font-family: "Segoe UI", Tahoma, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

a { color: var(--brand); text-underline-offset: 0.2em; }
a:hover { color: #82f5e8; }

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

.site-header {
  position: sticky;
  z-index: 5;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(0, 23, 29, 0.88);
  backdrop-filter: blur(18px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 72px;
}

.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); text-decoration: none; }
.brand__mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 1px solid rgba(83, 234, 216, 0.5);
  border-radius: 14px;
  background: linear-gradient(145deg, #0d4d51, #092e39);
  color: var(--gold);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.24);
  font-weight: 900;
}
.brand__name { display: block; font-weight: 800; line-height: 1.25; }
.brand__tag { display: block; color: var(--muted); font-size: 0.75rem; line-height: 1.3; }

.nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.nav a {
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.84rem;
  text-decoration: none;
}
.nav a:hover, .nav a[aria-current="page"] { background: rgba(67, 218, 200, 0.12); color: var(--ink); }

main { padding: 54px 0 72px; }
.hero { padding: 28px 0 24px; }
.eyebrow { margin: 0 0 8px; color: var(--brand); font-size: 0.82rem; font-weight: 800; letter-spacing: 0.08em; }
h1, h2, h3 { margin-top: 0; line-height: 1.35; }
h1 { max-width: 760px; margin-bottom: 14px; font-size: clamp(2rem, 7vw, 3.8rem); letter-spacing: -0.035em; }
h2 { margin-bottom: 12px; font-size: 1.28rem; }
h3 { margin-bottom: 6px; font-size: 1rem; }
.lead { max-width: 720px; margin: 0; color: var(--muted); font-size: 1.05rem; }
.meta { margin: 14px 0 0; color: var(--muted); font-size: 0.83rem; }

.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 28px; }
.card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(145deg, rgba(9, 48, 54, 0.88), rgba(5, 28, 38, 0.84));
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.18);
}
.card p:last-child, .card ul:last-child, .card ol:last-child { margin-bottom: 0; }
.card--wide { grid-column: 1 / -1; }
.card--gold { border-color: rgba(239, 194, 96, 0.35); }
.card--warning { border-color: rgba(255, 143, 158, 0.36); }

.steps, .plain-list { margin: 0; padding-inline-start: 1.35rem; }
.steps li, .plain-list li { margin: 0.45rem 0; }
.facts { display: grid; gap: 10px; margin: 16px 0 0; }
.fact { display: flex; justify-content: space-between; gap: 18px; padding: 11px 0; border-top: 1px solid var(--line); }
.fact span { color: var(--muted); }
.fact strong { text-align: end; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  margin-top: 10px;
  padding: 0 18px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--brand), var(--brand-strong));
  color: #002925;
  font-weight: 900;
  text-decoration: none;
}
.button:hover { color: #001e1b; filter: brightness(1.08); }
.ltr { direction: ltr; unicode-bidi: isolate; }
.muted { color: var(--muted); }
.danger { color: var(--danger); }

.site-footer { border-top: 1px solid var(--line); background: rgba(0, 17, 25, 0.62); }
.site-footer__inner { display: flex; justify-content: space-between; gap: 20px; padding: 26px 0; color: var(--muted); font-size: 0.82rem; }
.site-footer p { margin: 0; }

@media (max-width: 720px) {
  .site-header { position: static; }
  .site-header__inner, .site-footer__inner { align-items: flex-start; flex-direction: column; padding: 16px 0; }
  .nav { justify-content: flex-start; }
  main { padding-top: 26px; }
  .grid { grid-template-columns: 1fr; }
  .card--wide { grid-column: auto; }
  .fact { align-items: flex-start; flex-direction: column; gap: 2px; }
  .fact strong { text-align: start; }
}