:root { font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; }
* { box-sizing: border-box; }
body { margin: 0; background: #f7f7f9; color: #111; }
.container { max-width: 720px; margin: 48px auto; padding: 0 20px; }
.site-header { margin-bottom: 24px; }
.card { background: #fff; padding: 20px; border-radius: 12px; box-shadow: 0 2px 12px rgba(0,0,0,.06); }
.field { margin-bottom: 16px; }
label { display: block; font-weight: 600; margin-bottom: 6px; }
input { width: 100%; padding: 12px; border: 1px solid #ccc; border-radius: 8px; }
.actions { margin-top: 8px; }
button { padding: 12px 16px; border: 0; border-radius: 10px; cursor: pointer; background: #111; color: #fff; font-weight: 700; }
button:hover { opacity: .9; }
.msg { margin-top: 12px; min-height: 1.25em; }
.site-footer { margin-top: 24px; color: #666; }