:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100dvh;
  display: flex; align-items: center; justify-content: center;
  font-family: -apple-system, system-ui, "Segoe UI", Roboto, sans-serif;
  background: #f2f3f5; padding: 24px;
}
@media (prefers-color-scheme: dark) { body { background: #15171a; } }
.card {
  width: 100%; max-width: 420px; background: #fff; border-radius: 18px;
  padding: 28px 24px; box-shadow: 0 8px 30px rgba(0,0,0,.08); text-align: center;
}
@media (prefers-color-scheme: dark) { .card { background: #23262b; box-shadow: none; color: #e5e7eb; } }
h1 { margin: 0 0 6px; font-size: 1.5rem; }
h2 { font-size: 1.05rem; margin: 0 0 4px; }
.sub { margin: 0 0 22px; color: #6b7280; }
.buttons { display: flex; flex-direction: column; gap: 14px; }
.btn {
  appearance: none; border: 0; border-radius: 14px; padding: 18px;
  font-size: 1.15rem; font-weight: 600; color: #fff; cursor: pointer;
  transition: transform .05s, opacity .2s;
}
.btn:active { transform: scale(.98); }
.btn:disabled { opacity: .5; }
.btn.open { background: #16a34a; }
.btn.close { background: #475569; }
.msg { min-height: 1.4em; margin: 18px 0 0; font-weight: 600; }
.msg.ok { color: #16a34a; }
.msg.err { color: #dc2626; }
.foot { margin-top: 18px; color: #9ca3af; font-size: .85rem; }

/* admin */
.admin { max-width: 920px; text-align: left; }
.admin table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.admin th, .admin td { padding: 8px 6px; border-bottom: 1px solid #e5e7eb; text-align: left; vertical-align: top; }
.admin .pill { padding: 2px 8px; border-radius: 999px; font-size: .75rem; font-weight: 600; }
.admin .pill.ok { background: #dcfce7; color: #166534; }
.admin .pill.no { background: #fee2e2; color: #991b1b; }
.admin .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 12px 0; }
.admin input[type=text], .admin input[type=number], .admin input[type=datetime-local], .admin input[type=password] {
  width: 100%; padding: 8px; border: 1px solid #cbd5e1; border-radius: 8px;
}
.admin .row-actions form { display: inline; }
.admin .mini { padding: 4px 10px; font-size: .8rem; border-radius: 8px; }
.admin code { background: #f1f5f9; padding: 2px 6px; border-radius: 6px; word-break: break-all; color: #0f172a; }
.admin a { color: #2563eb; }