:root { color-scheme: light; font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: #172033; background: #eef3f8; }
* { box-sizing: border-box; }
body { margin: 0; background: linear-gradient(180deg, #dce7f3, #f7f9fb 280px); line-height: 1.6; }
header { background: #102b55; color: #fff; padding: 1.4rem; }
header div, main, footer { width: min(100% - 2rem, 900px); margin-inline: auto; }
h1 { margin: 0; font-size: clamp(1.65rem, 4vw, 2.35rem); }
main { margin-block: 1.25rem; padding: clamp(1.1rem, 3vw, 2rem); background: #fff; border: 1px solid #c9d5e3; border-radius: 12px; box-shadow: 0 8px 28px #17385e18; }
h2 { margin-top: 1.6rem; color: #102b55; }
h2:first-child { margin-top: 0; }
a { color: #124f91; }
.notice { padding: 1rem; border-left: 5px solid #b88418; background: #fff7e3; }
nav { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: .6rem; }
nav a { color: #d9efff; }
footer { padding: 0 0 2rem; color: #526174; }