:root {
  --red: #b71c1c;
  --bg: #f4efe6;
  --line: #d9cfbf;
  --text: #221c18;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(183,28,28,0.08), transparent 50%),
    linear-gradient(180deg, #f7f2e9, #ebe3d6);
  color: var(--text);
  min-height: 100vh;
}
.top {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 18px;
  background: linear-gradient(90deg, #7f1212, #c62828 55%, #9a1b1b);
  color: #fff;
}
.top.compact { justify-content: space-between; }
.brand { font-weight: 700; }
.links { display: flex; gap: 14px; flex: 1; }
.links a { color: #ffe0e0; font-size: 13px; }
.hidden { display: none !important; }
.card {
  width: min(420px, 92vw);
  margin: 40px auto;
  padding: 22px;
  background: rgba(255,255,255,0.92);
  border: 1px solid var(--line);
}
.card.login label { display: block; margin: 10px 0; font-size: 14px; }
.card input, .side input, .chat-input input, .pad input {
  width: 100%;
  margin-top: 6px;
  padding: 9px 10px;
  border: 1px solid var(--line);
}
button {
  border: none;
  background: var(--red);
  color: #fff;
  padding: 9px 14px;
  cursor: pointer;
  margin-top: 10px;
}
button.small { margin: 0; padding: 4px 10px; font-size: 12px; }
button.ghost { background: #5d4037; }
.layout { display: grid; grid-template-columns: 280px 1fr; min-height: calc(100vh - 52px); }
.side {
  border-right: 1px solid var(--line);
  background: rgba(255,255,255,0.72);
  padding: 12px;
}
.side-hd { display: flex; justify-content: space-between; align-items: center; }
.list { list-style: none; padding: 0; margin: 12px 0 0; }
.list li {
  padding: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  margin-bottom: 4px;
  background: #fff;
}
.list li.active, .list li:hover { border-color: var(--red); }
.main { padding: 18px 22px; }
.empty { color: #777; }
.form-grid { display: grid; gap: 10px; max-width: 640px; }
.form-grid label { font-size: 13px; display: block; }
.checks { max-height: 220px; overflow: auto; border: 1px solid var(--line); padding: 8px; background: #fff; }
.checks label { display: flex; gap: 8px; align-items: center; margin: 6px 0; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.meta { color: #666; font-size: 13px; margin-left: 8px; }
.room { display: flex; flex-direction: column; height: calc(100vh - 52px); }
.room-hd {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: rgba(255,255,255,0.85);
  border-bottom: 1px solid var(--line);
}
.room-body { flex: 1; display: grid; grid-template-columns: 1.4fr 1fr; min-height: 0; }
.media { padding: 12px; border-right: 1px solid var(--line); overflow: auto; }
.tip { font-size: 13px; color: #666; }
.tiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.tile {
  background: #2c211c;
  color: #fff;
  min-height: 100px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  font-size: 13px;
}
.tile .tag { opacity: 0.75; font-size: 11px; }
.tile video, .lk-tile video {
  width: 100%;
  height: 140px;
  object-fit: cover;
  background: #111;
  display: block;
}
.lk-label {
  font-size: 12px;
  padding: 4px 6px;
  background: rgba(0,0,0,0.45);
}
.lk-tile { padding: 0; overflow: hidden; min-height: 100px; background: #2c211c; color: #fff; }
.tile .tag { opacity: 0.75; font-size: 11px; }
.chat { display: flex; flex-direction: column; min-height: 0; background: rgba(255,255,255,0.7); }
.chat-log { flex: 1; overflow: auto; padding: 10px; font-size: 13px; }
.chat-log .row { margin-bottom: 8px; }
.chat-log .name { color: var(--red); font-weight: 600; }
.chat-input { display: flex; gap: 8px; padding: 10px; border-top: 1px solid var(--line); }
.chat-input button { margin: 0; }
.pad { padding: 16px; }
.member-list { font-size: 13px; margin-bottom: 8px; color: #444; }
.member-row { padding: 4px 0; border-bottom: 1px dashed var(--line); }
.pad-sm { padding: 8px 12px 0; }
.phone-room { height: calc(100vh - 48px); }
.phone .room-body { display: block; }
.phone .tiles { padding: 8px; }
.compact-chat { flex: 1; min-height: 180px; }
.phone-bar {
  display: flex;
  gap: 8px;
  justify-content: center;
  padding: 12px;
  background: #1f1614;
}
.phone-bar button { margin: 0; }
.room-actions { display: flex; gap: 8px; }
.room-actions button { margin: 0; }
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .room-body { grid-template-columns: 1fr; }
}