:root {
  color-scheme: light;
  --paper: #f5f2eb;
  --card: #ffffff;
  --ink: #141f29;
  --muted: #5c686f;
  --accent: #087b6b;
  --line: rgba(20, 31, 41, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}
a { color: var(--accent); }
header, main, footer { width: min(900px, calc(100% - 40px)); margin-inline: auto; }
header { padding: 34px 0 20px; display: flex; justify-content: space-between; gap: 20px; align-items: center; }
.brand { color: var(--ink); font-size: 1.35rem; font-weight: 800; text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 14px; font-size: .92rem; }
nav a { text-decoration: none; font-weight: 600; }
main { padding: 28px 0 70px; }
.hero { padding: 55px 0 35px; max-width: 720px; }
h1 { font-size: clamp(2.25rem, 7vw, 4.4rem); line-height: 1.04; margin: 0 0 20px; letter-spacing: -.04em; }
h2 { margin-top: 2.2rem; line-height: 1.2; }
h3 { margin-top: 1.6rem; }
.lead { font-size: 1.2rem; color: var(--muted); }
.meta, .muted { color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(235px, 1fr)); gap: 16px; margin-top: 28px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 22px; box-shadow: 0 10px 30px rgba(20, 31, 41, .04); }
.card h2, .card h3 { margin-top: 0; }
.button { display: inline-block; background: var(--accent); color: white; padding: 11px 17px; border-radius: 12px; text-decoration: none; font-weight: 700; }
.notice { border-left: 4px solid var(--accent); background: rgba(8, 123, 107, .08); padding: 14px 18px; border-radius: 10px; }
li + li { margin-top: .45rem; }
footer { padding: 25px 0 45px; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
@media (max-width: 650px) { header { align-items: flex-start; flex-direction: column; } .hero { padding-top: 30px; } }