:root {
  color-scheme: light;
  --ink: #20324f;
  --muted: #65758b;
  --line: #dbe5f0;
  --blue: #176de8;
  --blue-dark: #124fae;
  --surface: #ffffff;
  --background: #eef4fa;
  --danger: #b62f3a;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: linear-gradient(180deg, #dfeaf6 0, var(--background) 360px);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}
a { color: var(--blue-dark); }
.shell { width: min(920px, calc(100% - 32px)); margin: 0 auto; }
.topbar { padding: 24px 0 12px; }
.brand {
  display: inline-flex; align-items: center; gap: 12px; color: var(--ink);
  font-size: 19px; font-weight: 900; text-decoration: none;
}
.brand-mark {
  display: grid; width: 44px; height: 44px; place-items: center;
  border-radius: 14px; background: linear-gradient(135deg, #176de8, #58a1ff);
  color: white; font-size: 22px; box-shadow: 0 10px 25px rgba(23, 109, 232, .24);
}
.hero {
  margin: 18px 0 20px; padding: clamp(28px, 6vw, 54px); overflow: hidden;
  border-radius: 30px; background: linear-gradient(135deg, #124fae, #237bea 58%, #62aaff);
  color: white; box-shadow: 0 22px 55px rgba(21, 79, 160, .22);
}
.eyebrow {
  margin: 0 0 8px; color: #dbeaff; font-size: 13px; font-weight: 850;
  letter-spacing: .08em; text-transform: uppercase;
}
h1 { max-width: 720px; margin: 0; font-size: clamp(32px, 7vw, 54px); line-height: 1.08; letter-spacing: -.035em; }
.hero p { max-width: 680px; margin: 18px 0 0; color: #eaf3ff; font-size: 17px; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.card, .article {
  border: 1px solid var(--line); border-radius: 24px; background: var(--surface);
  box-shadow: 0 12px 32px rgba(36, 64, 98, .08);
}
.card {
  display: flex; min-height: 210px; flex-direction: column; padding: 24px;
  text-decoration: none; transition: transform 150ms ease, box-shadow 150ms ease;
}
.card:hover, .card:focus-visible { transform: translateY(-3px); box-shadow: 0 18px 38px rgba(36, 64, 98, .14); }
.card-icon {
  display: grid; width: 48px; height: 48px; place-items: center;
  border-radius: 15px; background: #e8f1ff; font-size: 23px;
}
.card h2 { margin: 18px 0 6px; color: var(--ink); font-size: 22px; }
.card p { margin: 0; color: var(--muted); }
.card strong { margin-top: auto; padding-top: 18px; color: var(--blue); }
.article { margin: 18px 0 28px; padding: clamp(24px, 6vw, 48px); }
.article h1 { color: var(--ink); font-size: clamp(30px, 6vw, 46px); }
.article h2 { margin: 34px 0 10px; font-size: 23px; }
.article p, .article li { color: #4f6077; }
.article ul, .article ol { padding-left: 22px; }
.meta { margin: 10px 0 28px; color: var(--muted); font-weight: 650; }
.notice { margin: 22px 0; padding: 18px; border: 1px solid #bad4fb; border-radius: 18px; background: #eef5ff; }
.notice.danger { border-color: #f1c4c8; background: #fff3f4; }
.button {
  display: inline-flex; align-items: center; justify-content: center; min-height: 50px;
  padding: 0 20px; border-radius: 15px; background: var(--blue); color: white;
  font-weight: 850; text-decoration: none;
}
footer { padding: 12px 0 36px; color: var(--muted); text-align: center; font-size: 14px; }
footer a { margin: 0 8px; }
@media (max-width: 650px) {
  .grid { grid-template-columns: 1fr; }
  .hero { border-radius: 24px; }
}