.preview-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.preview {
  width: 720px;
  max-width: calc(100% - 48px);
  height: 100%;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 12.5px;
  line-height: 1.35;
  overflow: hidden;
  background: var(--bg);
  color: var(--text) !important;
  border: var(--border);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  animation: cycle-themes 12s infinite;
}

.preview *:not(.msg) {
  transition: all 100ms ease;
}

.preview-bar {
  height: 40px;
  padding: 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  background: var(--bar-bg);
  color: var(--bar-color);
  border-bottom: 1px solid var(--divider, transparent);
}

.preview-username { color: var(--title-color); }
.preview-status { color: var(--meta); }

.preview-roombar {
  height: 32px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  background: var(--roombar-bg, var(--bar-bg));
  border-bottom: 1px solid var(--divider, transparent);
}
.preview-roomname { color: var(--meta); }
.preview-roommore { color: var(--meta); }

.preview-body {
  flex: 1;
  display: flex;
  min-height: 0;
  background: var(--chat-bg, var(--bg));
}

.preview-side {
  width: 168px;
  flex-shrink: 0;
  padding: 10px 8px;
  background: var(--side-bg);
  color: var(--side-color);
  overflow: hidden;
  border-right: 1px solid var(--divider, transparent);
}

.preview-nav-label { color: var(--side-h); }
.preview-unread {
  background: var(--accent, #2563eb);
  color: #fff;
}

.preview-room { color: var(--side-color); }
.preview-room.active {
  background: var(--room-active-bg, #1e3a5f);
  color: var(--room-active-color, #fff);
}

.preview-user { color: var(--side-color); }
.preview-user.on {
  color: var(--text);
  background: var(--user-on-bg, var(--bar-bg));
}

.preview-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.preview-chat {
  flex: 1;
  padding: 10px 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 10px;
}

.msg {
  background: var(--msg-bg, transparent);
}

.av {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.av.blue   { background: #5865f2; }
.av.purple { background: #9b59b6; }
.av.green  { background: #2ecc71; }
.av.orange { background: #e67e22; }
.av.red    { background: #e74c3c; }
.av.teal   { background: #1abc9c; }

.meta { color: var(--meta); }
.meta strong { color: var(--text); }
.text { color: var(--text) !important; }
.text code {
  background: var(--code-bg);
  color: var(--code-color);
}

.preview-composer {
  flex-shrink: 0;
  background: var(--composer-bg, var(--bar-bg));
  border-top: 1px solid var(--divider, transparent);
}
.preview-ico { color: var(--meta); }
.preview-input {
  background: var(--input-bg, var(--code-bg));
  border-color: var(--divider, transparent);
  color: var(--meta);
}
.preview-send {
  background: var(--accent, #2563eb);
  color: #fff;
}

@keyframes cycle-themes {
  /* Old Frutiger Aero */
  0%, 8.32% {
    --bg: #d6ecf8;
    --bar-bg: linear-gradient(to bottom, #8ed4f5 0%, #4aa9de 45%, #3b98cf 55%, #5bb8ea 100%);
    --bar-color: #fff;
    --title-color: #fff;
    --roombar-bg: rgba(255,255,255,0.22);
    --side-bg: rgba(255,255,255,0.28);
    --side-color: #1565c0;
    --side-h: #0d47a1;
    --room-active-bg: rgba(13,71,161,0.18);
    --room-active-color: #0d47a1;
    --user-on-bg: rgba(255,255,255,0.45);
    --chat-bg: transparent;
    --msg-bg: rgba(255,255,255,0.42);
    --composer-bg: rgba(255,255,255,0.28);
    --input-bg: rgba(255,255,255,0.7);
    --text: #0d3b66;
    --meta: #1976d2;
    --code-bg: rgba(255,255,255,0.55);
    --code-color: #0d47a1;
    --accent: #1d6fbf;
    --border: 1px solid rgba(255,255,255,0.75);
    --shadow: 0 14px 40px rgba(30,136,229,0.32), inset 0 1px 0 rgba(255,255,255,0.7);
    --radius: 10px;
    --divider: rgba(255,255,255,0.35);
  }

  /* Old Lightcast */
  8.33%, 16.65% {
    --bg: #313338;
    --bar-bg: #1e1f22;
    --bar-color: #f2f3f5;
    --title-color: #f2f3f5;
    --roombar-bg: #1e1f22;
    --side-bg: #2b2d31;
    --side-color: #949ba4;
    --side-h: #b5bac1;
    --room-active-bg: #404249;
    --room-active-color: #fff;
    --user-on-bg: #3f4147;
    --chat-bg: #313338;
    --msg-bg: #2b2d31;
    --composer-bg: #2b2d31;
    --input-bg: #383a40;
    --text: #dbdee1;
    --meta: #949ba4;
    --code-bg: #1e1f22;
    --code-color: #dbdee1;
    --accent: #5865f2;
    --border: 1px solid #1e1f22;
    --shadow: 0 10px 28px rgba(0,0,0,0.55);
    --radius: 8px;
    --divider: #1e1f22;
  }

  /* Win 95  */
  16.66%, 24.98% {
    --bg: #c0c0c0;
    --bar-bg: #000080;
    --bar-color: #fff;
    --title-color: #fff;
    --roombar-bg: #c0c0c0;
    --side-bg: #c0c0c0;
    --side-color: #000;
    --side-h: #000080;
    --room-active-bg: #000080;
    --room-active-color: #fff;
    --user-on-bg: #fff;
    --chat-bg: #c0c0c0;
    --msg-bg: #fff;
    --composer-bg: #c0c0c0;
    --input-bg: #fff;
    --text: #000;
    --meta: #000080;
    --code-bg: #fff;
    --code-color: #000;
    --accent: #000080;
    --border: 2px solid #808080;
    --shadow: inset 1px 1px 0 #fff, inset -1px -1px 0 #808080, 2px 2px 0 #000;
    --radius: 0;
    --divider: #808080;
  }

  /* Neon Cyberpunk */
  24.99%, 33.31% {
    --bg: #0a0a12;
    --bar-bg: #12081f;
    --bar-color: #00f5ff;
    --title-color: #00f5ff;
    --roombar-bg: #0f0618;
    --side-bg: #0f0618;
    --side-color: #c0a0d0;
    --side-h: #ff00aa;
    --room-active-bg: rgba(255,0,170,0.18);
    --room-active-color: #ff00aa;
    --user-on-bg: rgba(0,245,255,0.08);
    --chat-bg: #0a0a12;
    --msg-bg: #12081f;
    --composer-bg: #12081f;
    --input-bg: #1a0a2e;
    --text: #e8e0ff;
    --meta: #00f5ff;
    --code-bg: #1a0a2e;
    --code-color: #00f5ff;
    --accent: #ff00aa;
    --border: 1px solid #ff00aa;
    --shadow: 0 0 18px rgba(255,0,170,0.4), 0 0 36px rgba(0,245,255,0.18), inset 0 0 40px rgba(255,0,170,0.04);
    --radius: 4px;
    --divider: rgba(255,0,170,0.25);
  }

  /* Soft Pastel */
  33.32%, 41.64% {
    --bg: #fdf8f5;
    --bar-bg: linear-gradient(90deg, #ffd1dc, #e8d5ff);
    --bar-color: #5c4a6e;
    --title-color: #5c4a6e;
    --roombar-bg: #faf0f5;
    --side-bg: #faf0f5;
    --side-color: #8a6a8a;
    --side-h: #c45a7a;
    --room-active-bg: #ffe8ef;
    --room-active-color: #c45a7a;
    --user-on-bg: #fff;
    --chat-bg: #fdf8f5;
    --msg-bg: #fff;
    --composer-bg: #faf0f5;
    --input-bg: #fff;
    --text: #4a3a55;
    --meta: #a07a9a;
    --code-bg: #f5e6f0;
    --code-color: #8a4a6a;
    --accent: #c45a7a;
    --border: 1px solid #f0d0e0;
    --shadow: 0 12px 36px rgba(220,150,180,0.28);
    --radius: 14px;
    --divider: #f0d0e0;
  }

  /* Default */
  41.65%, 49.97% {
    --bg: #111;
    --bar-bg: #1a1a1a;
    --bar-color: #e0e0e0;
    --title-color: #e0e0e0;
    --roombar-bg: #1a1a1a;
    --side-bg: #161616;
    --side-color: #bbb;
    --side-h: #666;
    --room-active-bg: #1e3a5f;
    --room-active-color: #fff;
    --user-on-bg: #1e1e1e;
    --chat-bg: #111;
    --msg-bg: #1e1e1e;
    --composer-bg: #161616;
    --input-bg: #222;
    --text: #e0e0e0;
    --meta: #888;
    --code-bg: #222;
    --code-color: #93c5fd;
    --accent: #2563eb;
    --border: 1px solid #2a2a2a;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
    --radius: 12px;
    --divider: #333;
  }

  /* Lightcast */
  49.98%, 58.30% {
    --bg: #09090b;
    --bar-bg: #111113;
    --bar-color: #fafafa;
    --title-color: #fafafa;
    --roombar-bg: #111113;
    --side-bg: #111113;
    --side-color: #a1a1aa;
    --side-h: #71717a;
    --room-active-bg: rgba(99, 102, 241, 0.12);
    --room-active-color: #818cf8;
    --user-on-bg: #18181b;
    --chat-bg: #09090b;
    --msg-bg: #111113;
    --composer-bg: #111113;
    --input-bg: #18181b;
    --text: #fafafa;
    --meta: #71717a;
    --code-bg: #18181b;
    --code-color: #c7d2fe;
    --accent: #6366f1;
    --border: 1px solid #27272a;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
    --radius: 10px;
    --divider: #27272a;
  }

  /* Frutiger Aero */
  58.31%, 66.63% {
    --bg: #e8f4fc;
    --bar-bg: linear-gradient(180deg, rgba(255,255,255,0.9) 0%, rgba(230,245,255,0.85) 100%);
    --bar-color: #1a3a4a;
    --title-color: #1a3a4a;
    --roombar-bg: rgba(255, 255, 255, 0.72);
    --side-bg: rgba(255, 255, 255, 0.72);
    --side-color: #3d6a7a;
    --side-h: #6a9aaa;
    --room-active-bg: rgba(0, 160, 210, 0.12);
    --room-active-color: #0288d1;
    --user-on-bg: rgba(255, 255, 255, 0.88);
    --chat-bg: #eef8ff;
    --msg-bg: rgba(255, 255, 255, 0.72);
    --composer-bg: rgba(255, 255, 255, 0.72);
    --input-bg: #ffffff;
    --text: #1a3a4a;
    --meta: #6a9aaa;
    --code-bg: rgba(255, 255, 255, 0.88);
    --code-color: #0288d1;
    --accent: #00a0d2;
    --border: 1px solid rgba(120, 180, 220, 0.35);
    --shadow: 0 8px 32px rgba(0, 100, 150, 0.12);
    --radius: 14px;
    --divider: rgba(120, 180, 220, 0.35);
  }

  /* Radeon */
  66.64%, 74.96% {
    --bg: #070304;
    --bar-bg: rgba(18, 6, 8, 0.78);
    --bar-color: #f6e8e6;
    --title-color: #f6e8e6;
    --roombar-bg: rgba(18, 6, 8, 0.78);
    --side-bg: rgba(18, 6, 8, 0.78);
    --side-color: #d2b4b0;
    --side-h: #9a7672;
    --room-active-bg: rgba(225, 6, 0, 0.2);
    --room-active-color: #ff6b5a;
    --user-on-bg: rgba(28, 8, 12, 0.88);
    --chat-bg: #0a0304;
    --msg-bg: rgba(18, 6, 8, 0.78);
    --composer-bg: rgba(18, 6, 8, 0.78);
    --input-bg: #14080a;
    --text: #f6e8e6;
    --meta: #9a7672;
    --code-bg: #14080a;
    --code-color: #ff6b5a;
    --accent: #e10600;
    --border: 1px solid rgba(225, 6, 0, 0.32);
    --shadow: 0 12px 36px rgba(0, 0, 0, 0.55);
    --radius: 14px;
    --divider: rgba(225, 6, 0, 0.32);
  }

  /* IRC */
  74.97%, 83.29% {
    --bg: #000000;
    --bar-bg: #000080;
    --bar-color: #fff;
    --title-color: #fff;
    --roombar-bg: #0c0c0c;
    --side-bg: #0c0c0c;
    --side-color: #c0c0c0;
    --side-h: #808080;
    --room-active-bg: #141414;
    --room-active-color: #00ff00;
    --user-on-bg: #141414;
    --chat-bg: #000000;
    --msg-bg: #0c0c0c;
    --composer-bg: #0c0c0c;
    --input-bg: #141414;
    --text: #c0c0c0;
    --meta: #808080;
    --code-bg: #141414;
    --code-color: #00ffff;
    --accent: #0080ff;
    --border: 1px solid #404040;
    --shadow: none;
    --radius: 0;
    --divider: #404040;
  }

  /* Business */
  83.30%, 91.62% {
    --bg: #f3f2f1;
    --bar-bg: #ffffff;
    --bar-color: #323130;
    --title-color: #323130;
    --roombar-bg: #ffffff;
    --side-bg: #ebebeb;
    --side-color: #605e5c;
    --side-h: #8a8886;
    --room-active-bg: #deecf9;
    --room-active-color: #0078d4;
    --user-on-bg: #ffffff;
    --chat-bg: #ffffff;
    --msg-bg: #faf9f8;
    --composer-bg: #ffffff;
    --input-bg: #ffffff;
    --text: #323130;
    --meta: #8a8886;
    --code-bg: #f3f2f1;
    --code-color: #0078d4;
    --accent: #0078d4;
    --border: 1px solid #edebe9;
    --shadow: 0 1.6px 3.6px rgba(0, 0, 0, 0.13), 0 0.3px 0.9px rgba(0, 0, 0, 0.11);
    --radius: 2px;
    --divider: #d2d0ce;
  }

  /* Aurora */
  91.63%, 100% {
    --bg: #050814;
    --bar-bg: linear-gradient(180deg, rgba(14, 22, 44, 0.88) 0%, rgba(8, 12, 28, 0.72) 100%);
    --bar-color: #eef6ff;
    --title-color: #eef6ff;
    --roombar-bg: rgba(10, 16, 32, 0.86);
    --side-bg: rgba(10, 16, 32, 0.86);
    --side-color: #b7c7e0;
    --side-h: #7d8eab;
    --room-active-bg: rgba(52, 211, 153, 0.16);
    --room-active-color: #5eead4;
    --user-on-bg: rgba(16, 24, 48, 0.92);
    --chat-bg: #050814;
    --msg-bg: rgba(16, 24, 48, 0.92);
    --composer-bg: rgba(10, 16, 32, 0.86);
    --input-bg: #161e38;
    --text: #eef6ff;
    --meta: #7d8eab;
    --code-bg: #161e38;
    --code-color: #22d3ee;
    --accent: #34d399;
    --border: 1px solid rgba(125, 211, 252, 0.18);
    --shadow: 0 12px 40px rgba(2, 6, 23, 0.55);
    --radius: 12px;
    --divider: rgba(125, 211, 252, 0.18);
  }
}