:root{--bg: #ffffff;--bg-chat: #f9fafb;--bg-sidebar: #f3f4f6;--bg-elevated: #f0f1f3;--bg-hover: #e5e7eb;--bg-user-msg: #e8e8ea;--fg: #1a1a1a;--fg-muted: #6b7280;--fg-dim: #9ca3af;--text: #1a1a1a;--text-strong: #000000;--muted: #6b7280;--border: #e0e0e0;--border-strong: #d1d5db;--accent: #10a37f;--accent-hover: #0d8c6d;--accent-muted: rgba(16, 163, 127, .7);--accent-subtle: rgba(16, 163, 127, .08);--accent-2: #14b8a6;--ok: #22c55e;--ok-muted: rgba(34, 197, 94, .75);--danger: #ef4444;--danger-subtle: rgba(239, 68, 68, .08);--panel: #f3f4f6;--radius: 12px;--radius-sm: 8px;--radius-md: 10px;--radius-lg: 14px;--radius-full: 9999px;--max-width: 768px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;--mono: "SF Mono", "Fira Code", ui-monospace, monospace;--duration-fast: .14s;--ease-out: cubic-bezier(.22, 1, .36, 1)}:root[data-theme=gemini]{--bg: #131314;--bg-chat: #131314;--bg-sidebar: #1e1f20;--bg-elevated: #28292a;--bg-hover: #333537;--bg-user-msg: #28292a;--fg: #e3e3e3;--fg-muted: #b4b4b4;--fg-dim: #8e8e8e;--text: #e3e3e3;--text-strong: #ffffff;--muted: #b4b4b4;--border: #3c3c3c;--border-strong: #505050;--accent: #4285f4;--accent-hover: #5a9bf4;--accent-muted: rgba(66, 133, 244, .7);--accent-subtle: rgba(66, 133, 244, .1);--accent-2: #9b72cb;--ok: #34a853;--ok-muted: rgba(52, 168, 83, .75);--danger: #ea4335;--danger-subtle: rgba(234, 67, 53, .1);--panel: #1e1f20;--radius: 16px;--radius-sm: 10px;--radius-md: 14px;--radius-lg: 20px;--font: "Google Sans", Inter, Roboto, "Noto Sans SC", sans-serif;--ease-out: cubic-bezier(.4, 0, .2, 1)}:root[data-theme=dark]{--bg: #0d0d0d;--bg-chat: #141414;--bg-sidebar: #171717;--bg-elevated: #1e1e1e;--bg-hover: #2a2a2a;--bg-user-msg: #2b2b2b;--fg: #ececec;--fg-muted: #9b9b9b;--fg-dim: #666666;--text: #ececec;--text-strong: #f4f4f5;--muted: #838387;--border: #2e2e2e;--border-strong: #3e4050;--accent: #10a37f;--accent-hover: #0d8c6d;--accent-muted: rgba(16, 163, 127, .7);--accent-subtle: rgba(16, 163, 127, .08);--accent-2: #14b8a6;--ok: #22c55e;--ok-muted: rgba(34, 197, 94, .75);--danger: #ef4444;--danger-subtle: rgba(239, 68, 68, .08);--panel: #171717}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--fg);font-family:var(--font);font-size:20px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow:hidden;height:100vh}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::selection{background:var(--accent);color:#fff}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--border);background:var(--bg-elevated);color:var(--text);padding:8px 14px;border-radius:var(--radius-md);font-size:13px;font-weight:500;letter-spacing:-.01em;cursor:pointer;font-family:inherit;transition:border-color var(--duration-fast) var(--ease-out),background var(--duration-fast) var(--ease-out)}.btn:hover{background:var(--bg-hover);border-color:var(--border-strong)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--sm{padding:6px 10px;font-size:12px}.btn--subtle,.btn--ghost{border-color:transparent;background:transparent;color:var(--muted)}.btn--ghost:hover,.btn--subtle:hover{background:var(--bg-hover);color:var(--text)}.btn--primary,.btn.primary{border-color:var(--accent);background:var(--accent);color:#fff}.btn--primary:hover,.btn.primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}