:root { color-scheme: light; font-family: Inter, system-ui, sans-serif; color: #172033; background: #f6f8fc; }
* { box-sizing: border-box; }
body { margin: 0; line-height: 1.65; }
header, main, footer { width: min(860px, calc(100% - 32px)); margin: 0 auto; }
header { padding: 28px 0 16px; display: flex; gap: 16px; align-items: center; justify-content: space-between; }
nav { display: flex; flex-wrap: wrap; gap: 12px; }
a { color: #2754c5; }
main { background: white; border: 1px solid #e4e8f0; border-radius: 20px; padding: clamp(24px, 5vw, 52px); box-shadow: 0 16px 50px #1b2d4a10; }
h1, h2 { line-height: 1.2; }
h2 { margin-top: 2rem; }
.muted { color: #637083; }
.notice { padding: 16px; border-radius: 12px; background: #eef4ff; }
label { display: block; font-weight: 700; margin-bottom: 8px; }
input { width: 100%; padding: 13px 14px; border: 1px solid #bcc6d6; border-radius: 10px; font: inherit; }
button { border: 0; border-radius: 999px; padding: 12px 20px; font: inherit; font-weight: 800; cursor: pointer; background: #ffd900; color: #172033; }
button.danger { background: #b42318; color: white; }
button:disabled { opacity: .55; cursor: wait; }
.actions { display: flex; gap: 12px; margin-top: 16px; }
[hidden] { display: none !important; }
footer { padding: 28px 0 48px; color: #637083; }