:root {
  color-scheme: dark;
  --bg: #1e1f22;
  --bg-alt: #2b2d31;
  --bg-alt-2: #313338;
  --border: #3f4147;
  --text: #f2f3f5;
  --text-dim: #949ba4;
  --accent: #5865f2;
  --accent-hover: #4752c4;
  --danger: #da373c;
  --danger-hover: #a12828;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.hidden { display: none !important; }

#topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.brand { font-weight: 700; font-size: 18px; }

#user-box { display: flex; align-items: center; gap: 12px; }
#user-name { color: var(--text-dim); font-size: 14px; }

.btn {
  border: none;
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  color: var(--text);
}
.btn-primary { background: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: var(--danger-hover); }
.btn-ghost { background: transparent; color: var(--text-dim); }
.btn-ghost:hover { color: var(--text); }

.view {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.center-card {
  margin: auto;
  text-align: center;
  max-width: 400px;
}
.center-card p { color: var(--text-dim); margin-bottom: 20px; }

.rooms-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  border-bottom: 1px solid var(--border);
}
.rooms-header h2 { margin: 0; }
#create-room-form { display: flex; gap: 8px; }
#create-room-form input {
  background: var(--bg-alt-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 8px 10px;
  font-size: 14px;
}

#rooms-list {
  list-style: none;
  margin: 0;
  padding: 12px 20px;
  overflow-y: auto;
}
#rooms-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-radius: 8px;
  margin-bottom: 8px;
  background: var(--bg-alt);
}
#rooms-list a { color: var(--text); text-decoration: none; font-weight: 600; }
#rooms-list .room-meta { color: var(--text-dim); font-size: 12px; }

.room-topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.room-topbar h2 { margin: 0; flex: 1; }
.room-actions { display: flex; align-items: center; gap: 8px; }
#watching-count { color: var(--text-dim); font-size: 13px; }
#resolution-select {
  background: var(--bg-alt-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 7px 8px;
  font-size: 14px;
}
#resolution-select:disabled { opacity: 0.5; }

.room-body {
  flex: 1;
  min-height: 0;
  display: flex;
}

#video-grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 12px;
  padding: 16px;
  align-content: start;
  overflow-y: auto;
}

.video-tile {
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  aspect-ratio: 16 / 9;
}
.video-tile video { width: 100%; height: 100%; object-fit: contain; background: #000; }
.video-tile .label {
  position: absolute;
  left: 8px;
  bottom: 8px;
  background: rgba(0,0,0,0.6);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
}
.video-tile .unmute-btn {
  position: absolute;
  right: 8px;
  bottom: 8px;
  background: rgba(0,0,0,0.7);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 12px;
  cursor: pointer;
}
.video-tile .unmute-btn:hover { background: rgba(0,0,0,0.85); }

#chat-panel {
  width: 300px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--border);
  background: var(--bg-alt);
}
#participants-panel {
  flex-shrink: 0;
  max-height: 160px;
  overflow-y: auto;
  border-bottom: 1px solid var(--border);
}
#participants-header {
  padding: 10px 12px 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
#participants-list {
  list-style: none;
  margin: 0;
  padding: 0 12px 10px;
}
#participants-list li {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 0;
  font-size: 14px;
}
#participants-list .you-tag { color: var(--text-dim); font-size: 12px; }
#participants-list .sharing-tag {
  font-size: 11px;
  color: var(--danger);
  border: 1px solid var(--danger);
  border-radius: 4px;
  padding: 1px 5px;
}

#chat-log {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  font-size: 14px;
}
#chat-log .msg { margin-bottom: 10px; }
#chat-log .msg .author { font-weight: 600; margin-right: 6px; }
#chat-log .msg .time { color: var(--text-dim); font-size: 11px; margin-left: 6px; }
#chat-log .system-msg { color: var(--text-dim); font-size: 12px; font-style: italic; margin-bottom: 8px; }

#chat-form {
  display: flex;
  gap: 6px;
  padding: 10px;
  border-top: 1px solid var(--border);
}
#chat-input {
  flex: 1;
  background: var(--bg-alt-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 8px 10px;
  font-size: 14px;
}

#banner {
  text-align: center;
  padding: 6px;
  font-size: 13px;
  background: var(--danger);
  display: none;
}
#banner.visible { display: block; }