:root {
  color-scheme: light dark;
  --bg: #edf4f5;
  --surface: rgba(255, 255, 255, .9);
  --text: #102a32;
  --muted: #587078;
  --cobalt: #165b78;
  --teal: #0d897e;
  --gold: #bd8d3c;
  --line: #c9dde1;
  --soft: #e3f0f1;
  --shadow: 0 26px 76px rgba(17, 67, 82, .14);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #07161b;
    --surface: rgba(13, 34, 41, .92);
    --text: #f2fafb;
    --muted: #aac0c5;
    --cobalt: #76c8e5;
    --teal: #52d4c6;
    --gold: #e0b66d;
    --line: #284750;
    --soft: #122f37;
    --shadow: 0 28px 84px rgba(0, 0, 0, .34);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  line-height: 1.68;
  background:
    radial-gradient(circle at 92% 2%, rgba(13, 137, 126, .2), transparent 32rem),
    radial-gradient(circle at 4% 96%, rgba(189, 141, 60, .12), transparent 28rem),
    var(--bg);
  color: var(--text);
}

main {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 34px 0 74px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 10px 4px 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 850;
  letter-spacing: -.025em;
}

.mark {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, .5);
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(145deg, var(--cobalt), var(--teal));
  box-shadow: 0 12px 30px rgba(13, 137, 126, .24);
}

.navlinks { display: flex; gap: 18px; flex-wrap: wrap; }
a { color: var(--cobalt); font-weight: 760; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 4px; }

article {
  padding: clamp(25px, 5vw, 56px);
  border: 1px solid var(--line);
  border-radius: 30px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--teal);
  font-size: .78rem;
  font-weight: 900;
  letter-spacing: .18em;
  text-transform: uppercase;
}

h1 {
  max-width: 780px;
  margin: 0 0 16px;
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: .98;
  letter-spacing: -.055em;
}

h2 { margin: 38px 0 10px; font-size: 1.35rem; letter-spacing: -.02em; }
p, li { color: var(--muted); }
.lead { max-width: 760px; font-size: 1.12rem; }
.meta { color: var(--gold); font-weight: 800; }
.notice { padding: 18px 20px; border: 1px solid var(--line); border-radius: 18px; background: var(--soft); }
.notice strong { color: var(--text); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 30px;
}

.card { padding: 22px; border: 1px solid var(--line); border-radius: 20px; background: var(--soft); }
.card h2 { margin: 0 0 8px; }
.footer { margin-top: 24px; text-align: center; font-size: .86rem; color: var(--muted); }

@media (max-width: 650px) {
  main { width: min(100% - 22px, 960px); padding-top: 18px; }
  .nav { align-items: flex-start; flex-direction: column; }
  .navlinks { gap: 14px; }
  article { border-radius: 24px; }
}