:root {
  color-scheme: light;
  --ink: #17212b;
  --muted: #536271;
  --line: #d7dee3;
  --canvas: #f6f8f8;
  --surface: #ffffff;
  --accent: #005f73;
  --accent-deep: #003f4c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.6;
}

a { color: var(--accent-deep); }

.shell { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

header { background: var(--surface); border-bottom: 1px solid var(--line); }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 76px;
}

.brand { color: var(--ink); font-size: 1.2rem; font-weight: 700; text-decoration: none; }

nav { display: flex; flex-wrap: wrap; gap: 18px; font-family: Arial, sans-serif; font-size: 0.9rem; }
nav a { text-decoration: none; }

main { padding: 68px 0; }

.eyebrow { color: var(--accent); font-family: Arial, sans-serif; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }

h1, h2 { line-height: 1.15; margin: 0; }
h1 { font-size: 3rem; max-width: 760px; }
h2 { font-size: 1.5rem; }

.intro { color: var(--muted); font-size: 1.2rem; max-width: 720px; }

.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin-top: 42px; }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 24px; }
.panel p { color: var(--muted); margin-bottom: 0; }

.notice { border-left: 4px solid var(--accent); margin-top: 42px; padding: 18px 22px; background: #e8f2f2; }

footer { border-top: 1px solid var(--line); color: var(--muted); font-family: Arial, sans-serif; font-size: 0.85rem; padding: 28px 0 44px; }
footer .shell { display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between; }

@media (max-width: 720px) {
  .topbar { align-items: flex-start; flex-direction: column; padding: 20px 0; }
  main { padding: 42px 0; }
  h1 { font-size: 2.25rem; }
  .grid { grid-template-columns: 1fr; }
}