:root{--bg-main:#e5ddd5;--bg-panel:#f0f2f5;--bg-card:#fff;--text-main:#111b21;--text-muted:#54656f;--msg-out:#dcf8c6;--msg-in:#fff;--border:#d1d5db;--accent:#007bff;--send-btn:#00a884;--reply-bg:#0000000d;--reply-border:#00a884}[data-theme=dark]{--bg-main:#0b141a;--bg-panel:#202c33;--bg-card:#111b21;--text-main:#e9edef;--text-muted:#8696a0;--msg-out:#005c4b;--msg-in:#202c33;--border:#222e35;--accent:#005c4b;--send-btn:#00a884;--reply-bg:#ffffff0d;--reply-border:#00a884}body{background-color:var(--bg-main);color:var(--text-main);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.chat-bg{opacity:.4;z-index:0;pointer-events:none;background-image:url(https://user-images.githubusercontent.com/15075759/28719144-86dc0f70-73b1-11e7-911d-60d70fcded21.png);background-repeat:repeat;background-size:400px;position:absolute;inset:0}[data-theme=dark] .chat-bg{opacity:.08;filter:invert()}::placeholder{color:var(--text-muted);opacity:.7}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-thumb{background-color:var(--text-muted);border-radius:10px}