:root {
  color-scheme: dark;
  --background: #111317;
  --surface: #1a1d23;
  --surface-2: #232730;
  --border: #343a46;
  --text: #f3f5f7;
  --muted: #9ea7b3;
  --accent: #4d8dff;
  --danger: #c94f5c;
  --success: #45b879;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--background); color: var(--text); }
button, .button, input, select { font: inherit; }
button, .button { border: 1px solid transparent; border-radius: 8px; padding: .68rem .95rem; background: var(--accent); color: white; cursor: pointer; text-decoration: none; }
button:hover, .button:hover { filter: brightness(1.08); }
button:disabled { cursor: wait; opacity: .65; }
.secondary { background: var(--surface-2); border-color: var(--border); }
.danger { background: var(--danger); }
input, select { width: 100%; border: 1px solid var(--border); border-radius: 8px; padding: .72rem; background: var(--surface-2); color: var(--text); }
label { display: grid; gap: .4rem; }
h1, h2 { margin: 0; }
.muted { color: var(--muted); }
.topbar { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 1.4rem; border-bottom: 1px solid var(--border); background: rgba(17,19,23,.94); backdrop-filter: blur(12px); }
.top-actions { display: flex; align-items: center; gap: .65rem; }
.top-actions select { width: auto; }
.page { padding: 1.25rem; }
.filters, .chip-list { display: flex; flex-wrap: wrap; gap: .55rem; margin-bottom: 1rem; }
.filter-button, .chip { background: var(--surface); border-color: var(--border); }
.filter-button.active { background: var(--accent); border-color: var(--accent); }
.camera-grid { display: grid; gap: 1rem; }
.columns-1 { grid-template-columns: minmax(0,1fr); }
.columns-2 { grid-template-columns: repeat(2,minmax(0,1fr)); }
.columns-3 { grid-template-columns: repeat(3,minmax(0,1fr)); }
.columns-4 { grid-template-columns: repeat(4,minmax(0,1fr)); }
.camera-card { min-width: 0; overflow: hidden; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.camera-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .85rem 1rem; }
.camera-name { font-size: 1rem; }
.camera-groups { margin-top: .25rem; font-size: .8rem; }
.camera-actions { display: flex; gap: .4rem; }
.camera-actions button { padding: .45rem .65rem; font-size: .78rem; }
.video-shell { position: relative; aspect-ratio: 16/9; overflow: hidden; background: #050607; }
video { display: block; width: 100%; height: 100%; object-fit: contain; }
.video-status { position: absolute; left: .7rem; bottom: .7rem; max-width: calc(100% - 1.4rem); padding: .35rem .55rem; border-radius: 6px; background: rgba(0,0,0,.72); font-size: .75rem; color: #ffb3b9; }
.video-status.ok { color: #b4f2cf; }
.empty-state { padding: 3rem; text-align: center; color: var(--muted); }
.login-body { display: grid; place-items: center; padding: 1rem; }
.login-card { width: min(420px,100%); padding: 2rem; border: 1px solid var(--border); border-radius: 14px; background: var(--surface); }
.brand-mark { display: grid; place-items: center; width: 44px; height: 44px; margin-bottom: 1rem; border-radius: 10px; background: var(--accent); font-weight: 800; }
.stack { display: grid; gap: 1rem; margin-top: 1.5rem; }
.error-text { margin: 0; color: #ff9aa6; }
.admin-page { display: grid; gap: 1.2rem; }
.admin-section { overflow-x: auto; padding: 1.2rem; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.admin-section h2 { margin-bottom: 1rem; }
.section-heading { display: flex; justify-content: space-between; gap: 1rem; }
.inline-form, .form-grid { display: grid; gap: .7rem; margin-bottom: 1rem; }
.inline-form { grid-template-columns: 1fr 2fr auto auto; }
.form-grid { grid-template-columns: repeat(4,minmax(0,1fr)); }
.full-row { grid-column: 1/-1; }
fieldset { border: 1px solid var(--border); border-radius: 8px; padding: .75rem; }
.checkbox-list { display: flex; flex-wrap: wrap; gap: .8rem; }
.checkbox-row { display: flex; align-items: center; gap: .45rem; }
.checkbox-row input { width: auto; }
.form-actions, .table-actions { display: flex; gap: .5rem; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: .72rem; border-top: 1px solid var(--border); text-align: left; vertical-align: middle; }
th { color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; }
.notice { position: sticky; top: 5.5rem; z-index: 30; padding: .85rem 1rem; border: 1px solid var(--success); border-radius: 8px; background: #173326; }
.notice.error { border-color: var(--danger); background: #3a1d22; }
@media (max-width:1100px) {
  .columns-3, .columns-4 { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .form-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width:720px) {
  .topbar, .camera-header, .section-heading { align-items: stretch; flex-direction: column; }
  .top-actions { flex-wrap: wrap; }
  .columns-2, .columns-3, .columns-4 { grid-template-columns: 1fr; }
  .inline-form, .form-grid { grid-template-columns: 1fr; }
}