:root {
  --bg: #0b0d10;
  --panel: #161a20;
  --line: #262c35;
  --text: #e8ecf1;
  --muted: #8b95a3;
  --accent: #3d8bfd;
  --danger: #ff6b6b;
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text); }
body {
  font: 15px/1.4 -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none; user-select: none;
  overscroll-behavior: none;
}
[hidden] { display: none !important; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

/* login */
.login { min-height: 100%; display: grid; place-items: center; padding: calc(24px + var(--safe-t)) 16px calc(24px + var(--safe-b)); }
.login-card { width: min(360px, 100%); display: grid; gap: 14px; background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 28px 22px; }
.login-logo { width: 64px; height: 64px; border-radius: 14px; justify-self: center; }
.login-card h1 { margin: 0 0 6px; text-align: center; font-size: 22px; font-weight: 600; }
.login-card label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
.login-card input {
  font: inherit; font-size: 17px; color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 10px; padding: 12px; -webkit-user-select: text; user-select: text;
}
.login-card input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.login-card button[type=submit] { margin-top: 6px; background: var(--accent); color: #fff; border-radius: 10px; padding: 13px; font-size: 17px; font-weight: 600; }
.login-card button[disabled] { opacity: .6; }
.login-error { margin: 0; min-height: 1.4em; color: var(--danger); text-align: center; font-size: 14px; }

/* main */
.app { min-height: 100%; padding: var(--safe-t) var(--safe-r) var(--safe-b) var(--safe-l); display: flex; flex-direction: column; }
/* Phone: tabs + logout on row 1, layout/stream controls fill row 2. Wide: one row, controls right-aligned. */
.bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 4px; padding: 8px 8px 8px 12px; }
.tabs { flex: 1 1 0; min-width: 0; display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; order: 1; }
#logout-btn { order: 2; }
.controls { order: 3; flex: 1 0 100%; display: flex; align-items: center; gap: 8px; }
@media (min-width: 720px) {
  .controls { order: 2; flex: none; margin-left: auto; margin-right: 8px; }
  .controls .seg { flex: none; width: 260px; }
  #logout-btn { order: 3; }
}
.tabs::-webkit-scrollbar { display: none; }
.tab { flex: none; padding: 7px 14px; border-radius: 999px; background: var(--panel); border: 1px solid var(--line); color: var(--muted); white-space: nowrap; }
.tab[aria-selected=true] { background: var(--accent); border-color: var(--accent); color: #fff; }
.icon-btn { min-width: 40px; height: 40px; border-radius: 10px; font-size: 22px; line-height: 1; display: inline-grid; place-items: center; }
.icon-btn:active { background: var(--panel); }
.icon-btn[disabled] { opacity: .3; }
.seg { flex: 1; max-width: 320px; display: flex; gap: 2px; padding: 2px; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; }
.seg button { flex: 1; padding: 7px 0; border-radius: 8px; font-size: 14px; font-weight: 600; color: var(--muted); font-variant-numeric: tabular-nums; }
.seg button[aria-checked=true] { background: var(--accent); color: #fff; }
#quality-btn { flex: none; white-space: nowrap; padding: 8px 12px; }

.grid { display: grid; grid-template-columns: repeat(var(--cols, 2), 1fr); gap: 2px; background: #000; touch-action: pan-y; }
.tile { position: relative; aspect-ratio: 16 / 9; background: #000; overflow: hidden; }
.tile cam-player { position: absolute; inset: 0; }
.tile-name {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 14px 8px 5px; font-size: 12px;
  background: linear-gradient(transparent, rgba(0,0,0,.75)); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; pointer-events: none;
}
.grid[data-cols="1"] .tile-name { font-size: 14px; }
.grid[data-cols="3"] .tile-name { font-size: 10px; padding: 10px 5px 3px; }
.grid[data-cols="4"] .tile-name { font-size: 9px; padding: 8px 3px 2px; }
.grid[data-cols="3"] .cam-status, .grid[data-cols="4"] .cam-status { font-size: 10px; padding: 2px; }

cam-player { display: block; background: #000; }
cam-player video { object-fit: contain; background: #000; }
.cam-status {
  position: absolute; inset: 0; display: grid; place-items: center; font-size: 13px; color: var(--muted);
  pointer-events: none; text-align: center; padding: 8px;
}
cam-player[data-state=playing] .cam-status { display: none; }
cam-player[data-state=error] .cam-status { color: var(--danger); }

.pager { display: flex; align-items: center; justify-content: center; gap: 18px; padding: 6px; color: var(--muted); font-variant-numeric: tabular-nums; }
.chips-wrap { padding: 4px 12px 16px; }
.chips-wrap h2 { margin: 6px 0 10px; font-size: 13px; font-weight: 500; color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { padding: 8px 12px; border-radius: 10px; background: var(--panel); border: 1px solid var(--line); max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chip.on-page { border-color: var(--accent); }

/* single camera */
.single { position: fixed; inset: 0; background: #000; display: flex; flex-direction: column; z-index: 10; }
.single-bar, .single-foot {
  display: flex; align-items: center; gap: 8px; padding: 6px 8px;
  padding-left: calc(8px + var(--safe-l)); padding-right: calc(8px + var(--safe-r));
  background: rgba(11,13,16,.92); transition: opacity .2s;
}
.single-bar { padding-top: calc(6px + var(--safe-t)); }
.single-foot { padding-bottom: calc(6px + var(--safe-b)); justify-content: space-between; color: var(--muted); font-size: 12px; }
.single-title { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-weight: 600; }
.pill { padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line); font-size: 13px; }
.pill.hd { background: var(--accent); border-color: var(--accent); color: #fff; }
.stage { flex: 1; position: relative; overflow: hidden; touch-action: none; }
.stage-inner { position: absolute; inset: 0; transform-origin: 0 0; will-change: transform; }
.stage-inner cam-player { position: absolute; inset: 0; }
.single.ui-hidden .single-bar, .single.ui-hidden .single-foot { opacity: 0; pointer-events: none; }
@media (orientation: landscape) and (max-height: 500px) {
  .single-bar, .single-foot { position: absolute; left: 0; right: 0; z-index: 2; }
  .single-bar { top: 0; }
  .single-foot { bottom: 0; }
  .chips-wrap { display: none; }
}