:root { --ink: #16303a; --accent: #0b7285; --bg: #f3f7f8; }
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; color: var(--ink); background: var(--bg); }
header { background: var(--accent); color: #fff; padding: 16px 24px; }
header h1 { margin: 0; font-size: 20px; }
main { max-width: 640px; margin: 0 auto; padding: 24px 16px; }
.card { background: #fff; border: 1px solid #dbe6e9; border-radius: 10px; padding: 18px; margin: 14px 0; }
.card h2 { margin-top: 0; font-size: 16px; color: var(--accent); }
.muted { color: #5a737c; font-size: 13px; }
label { display: block; font-size: 14px; }
input { width: 100%; padding: 8px; margin-top: 4px; border: 1px solid #c3d4d8; border-radius: 6px; }
button { background: var(--accent); color: #fff; border: 0; border-radius: 6px; padding: 9px 16px; cursor: pointer; }