/* ScreenParty — 导播监视器墙美学
   底:监视器黑 / 状态:tally 红(ON AIR) / 数据:等宽白 */

:root {
  --bg: #0a0c0e;
  --panel: #14181d;
  --panel-2: #1b2129;
  --line: #262d36;
  --text: #e8ecef;
  --text-dim: #8b95a1;
  --tally: #ff2e3e;      /* 正在共享 = ON AIR */
  --amber: #f5a623;      /* 操作高亮 */
  --mono: ui-monospace, "SF Mono", Consolas, "Cascadia Mono", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

button { font: inherit; color: inherit; cursor: pointer; background: none; border: none; }
button:focus-visible, input:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }

/* ---------- 加入界面 ---------- */

.lobby {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 24px;
}

.lobby-card {
  width: min(400px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.brand { text-align: center; margin-bottom: 14px; }
.brand h1 { font-size: 24px; letter-spacing: 0.5px; display: inline; vertical-align: middle; }
.brand-sub { color: var(--text-dim); font-size: 13px; margin-top: 6px; }

.brand-dot {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--tally);
  box-shadow: 0 0 8px var(--tally);
  margin-right: 10px;
  vertical-align: middle;
}

.lobby-card label { font-size: 13px; color: var(--text-dim); margin-top: 6px; }

.lobby-card input {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  padding: 10px 12px;
  font-size: 15px;
}

.btn-primary {
  margin-top: 16px;
  background: var(--tally);
  color: #fff;
  border-radius: 6px;
  padding: 11px;
  font-weight: 600;
  transition: filter 0.15s;
}
.btn-primary:hover { filter: brightness(1.12); }
.btn-primary:disabled { filter: grayscale(1) brightness(0.6); cursor: default; }

.lobby-error { color: var(--tally); font-size: 13px; }
.lobby-hint { color: var(--text-dim); font-size: 12px; margin-top: 8px; }

/* ---------- 房间界面 ---------- */

.room {
  height: 100dvh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  flex-wrap: wrap;
}

.topbar-room { display: flex; align-items: center; gap: 4px; }
.room-name { font-weight: 600; letter-spacing: 0.3px; }

.btn-ghost {
  margin-left: 12px;
  font-size: 12px;
  color: var(--text-dim);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 4px 10px;
  transition: color 0.15s, border-color 0.15s;
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-dim); }

.members {
  display: flex;
  gap: 14px;
  list-style: none;
  flex-wrap: wrap;
}

.members li {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-dim);
}

.members li::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text-dim);
}
.members li.is-sharing { color: var(--text); }
.members li.is-sharing::before {
  background: var(--tally);
  box-shadow: 0 0 6px var(--tally);
}

/* ---------- Multiview 网格 ---------- */

.grid {
  flex: 1;
  min-height: 0;
  display: grid;
  gap: 8px;
  padding: 8px;
  grid-template-columns: repeat(var(--cols, 1), 1fr);
  align-content: center;
}

.grid[data-count="0"] { place-items: center; }
.grid[data-count="1"] { --cols: 1; }
.grid[data-count="2"] { --cols: 2; }
.grid[data-count="3"], .grid[data-count="4"] { --cols: 2; }
.grid[data-count="5"], .grid[data-count="6"] { --cols: 3; }

.empty { text-align: center; color: var(--text-dim); }
.empty-sub { font-size: 13px; margin-top: 6px; }
.grid:not([data-count="0"]) .empty { display: none; }

.tile {
  position: relative;
  background: #000;
  border: 2px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  min-height: 0;
  aspect-ratio: 16 / 9;
  align-self: center;
  cursor: pointer;
}

.tile.on-air { border-color: var(--tally); }

.tile video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: #000;
}

/* 聚焦模式:点击某路放大,其余缩为侧栏 */
.grid.focused { --cols: 1; grid-template-columns: 1fr 180px; grid-auto-rows: min-content; }
.grid.focused .tile { aspect-ratio: auto; }
.grid.focused .tile.is-focus { grid-column: 1; grid-row: 1 / span 99; height: 100%; }
.grid.focused .tile:not(.is-focus) { grid-column: 2; aspect-ratio: 16/9; }

.umd {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 10px;
  background: rgba(0, 0, 0, 0.65);
  font-size: 13px;
}

.umd-name { font-weight: 600; letter-spacing: 0.3px; }

.umd-tally {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 1.5px;
  color: #fff;
  background: var(--tally);
  border-radius: 3px;
  padding: 2px 6px;
}

.tile-stats {
  position: absolute;
  top: 6px; right: 8px;
  font-family: var(--mono);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(0, 0, 0, 0.5);
  border-radius: 3px;
  padding: 2px 6px;
  white-space: pre;
}
.tile-stats:empty { display: none; }

/* ---------- 底部控制台 ---------- */

.console {
  display: flex;
  justify-content: center;
  gap: 14px;
  padding: 12px;
  border-top: 1px solid var(--line);
  background: var(--panel);
}

.ctl {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-width: 84px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
  font-size: 12px;
  color: var(--text-dim);
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.ctl:hover { color: var(--text); border-color: var(--text-dim); }

.ctl[aria-pressed="true"] { color: var(--text); }

.ctl.is-off { color: var(--tally); }
.ctl:disabled { opacity: 0.45; cursor: default; }

.ctl-share[aria-pressed="true"] {
  background: var(--tally);
  border-color: var(--tally);
  color: #fff;
}

.ctl-leave:hover { color: var(--tally); border-color: var(--tally); }

@media (max-width: 640px) {
  .grid[data-count="2"] { --cols: 1; }
  .grid[data-count="3"], .grid[data-count="4"] { --cols: 1; }
  .grid[data-count="5"], .grid[data-count="6"] { --cols: 2; }
  .grid.focused { grid-template-columns: 1fr; }
  .grid.focused .tile:not(.is-focus) { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}