:root { --maxw: 1100px; }
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; line-height: 1.4; }
a { color: inherit; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 1rem; }
.topbar { border-bottom: 1px solid #ddd; background: #fafafa; }
.topbar__inner { max-width: var(--maxw); margin: 0 auto; padding: .75rem 1rem; display:flex; align-items:center; justify-content:space-between; gap: 1rem;}
.brand { font-weight: 700; text-decoration: none; }
.nav a { margin-left: .75rem; text-decoration: none; }
.nav a:hover { text-decoration: underline; }
.card { border: 1px solid #ddd; border-radius: .5rem; padding: 1rem; background: white; }
.row { display: flex; gap: 1rem; flex-wrap: wrap; }
.row > * { flex: 1 1 320px; }
h1,h2,h3 { margin-top: 0; }
label { display:block; font-weight: 600; margin-top: .75rem; }
input[type=text], input[type=password], input[type=email], input[type=datetime-local], textarea {
  width: 100%; padding: .6rem .7rem; border: 1px solid #ccc; border-radius: .4rem;
}
textarea { min-height: 160px; }
button, .btn { padding: .6rem .9rem; border: 1px solid #222; background: #222; color: #fff; border-radius: .4rem; cursor: pointer; text-decoration: none; display: inline-block; }
button.secondary, .btn.secondary { background: #fff; color: #222; }
button:disabled { opacity: .6; cursor: not-allowed; }
.table { width: 100%; border-collapse: collapse; margin-top: .75rem; }
.table th, .table td { border-bottom: 1px solid #eee; padding: .5rem; text-align:left; vertical-align: top; }
.flash { padding: .75rem 1rem; border-radius: .4rem; margin: 0 0 1rem 0; border: 1px solid #ddd; }
.flash--ok { border-color: #3c763d; }
.flash--err { border-color: #a94442; }
.small { color: #555; font-size: .9rem; }
.footer { border-top: 1px solid #ddd; margin-top: 2rem; padding: 1rem 0; background: #fafafa; }
dialog { border: 1px solid #ddd; border-radius: .6rem; padding: 1rem; width: min(720px, 96vw); }
dialog::backdrop { background: rgba(0,0,0,.4); }