:root {
  color-scheme: light dark;
  --ink: #0b1322;
  --paper: #f7f9fd;
  --card: rgba(255, 255, 255, 0.82);
  --muted: #566174;
  --line: #d8e0ef;
  --blue: #299eff;
  --cyan: #19ded3;
  --violet: #a462ff;
  --orange: #ff9426;
  font-family: ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(41, 158, 255, 0.14), transparent 28rem),
    radial-gradient(circle at 100% 18%, rgba(164, 98, 255, 0.11), transparent 30rem),
    var(--paper);
  line-height: 1.65;
}

main {
  width: min(820px, calc(100% - 32px));
  margin: 0 auto;
  padding: 52px 0 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-weight: 900;
  letter-spacing: 0.02em;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid rgba(41, 158, 255, 0.45);
  border-radius: 12px;
  color: #fff;
  background: linear-gradient(145deg, #10244a, #081326);
  box-shadow: 0 10px 28px rgba(41, 158, 255, 0.2);
  font-family: Georgia, serif;
  font-size: 1.25rem;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 18px;
}

a { color: #177bd0; text-underline-offset: 3px; }

.hero {
  margin: 26px 0;
  padding: clamp(26px, 6vw, 48px);
  overflow: hidden;
  border: 1px solid rgba(41, 158, 255, 0.28);
  border-radius: 30px;
  background: linear-gradient(135deg, rgba(41, 158, 255, 0.13), rgba(25, 222, 211, 0.08) 48%, rgba(164, 98, 255, 0.1));
  box-shadow: 0 24px 70px rgba(11, 19, 34, 0.08);
}

h1, h2 { line-height: 1.18; }
h1 { margin: 0 0 12px; font-size: clamp(2.2rem, 8vw, 4rem); letter-spacing: -0.045em; }
h2 { margin: 0 0 10px; font-size: 1.35rem; letter-spacing: -0.018em; }
p, ul { margin: 0 0 16px; }
li + li { margin-top: 8px; }

.lead { max-width: 680px; color: var(--muted); font-size: 1.08rem; }

.card {
  margin-top: 18px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--card);
  box-shadow: 0 14px 42px rgba(11, 19, 34, 0.045);
}

.note { border-left: 4px solid var(--orange); }
.meta { margin-top: 38px; color: var(--muted); font-size: 0.92rem; }

.action {
  display: inline-block;
  margin-top: 7px;
  padding: 12px 18px;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  font-weight: 800;
  text-decoration: none;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f6f9ff;
    --paper: #07101f;
    --card: rgba(16, 29, 51, 0.82);
    --muted: #aab7ca;
    --line: #253653;
  }
  a { color: #66baff; }
}

@media (max-width: 560px) {
  main { padding-top: 28px; }
  .hero, .card { border-radius: 20px; }
}