:root{--primary:#0f172a;--primary-hover:#1e293b;--accent:#0ea5e9;--bg-main:#f8fafc;--bg-card:#fff;--bg-chat:#fff;--text-main:#334155;--text-dark:#0f172a;--text-light:#64748b;--border:#e2e8f0;--bg-bubble-ai:#f1f5f9;--success:#10b981;--error:#ef4444}[data-theme=dark]{--primary:#38bdf8;--primary-hover:#7dd3fc;--accent:#38bdf8;--bg-main:#020617;--bg-card:#0f172a;--bg-chat:#1e293b;--text-main:#94a3b8;--text-dark:#f1f5f9;--text-light:#64748b;--border:#1e293b;--bg-bubble-ai:#1e293b;--success:#34d399;--error:#f87171}body{margin:0;font-family:Pretendard,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--bg-main);color:var(--text-main);-webkit-font-smoothing:antialiased}*{box-sizing:border-box}a{text-decoration:none;color:inherit}.container{max-width:1000px;margin:0 auto;padding:0 20px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 18px;border-radius:8px;font-weight:600;font-size:14px;cursor:pointer;transition:all .2s ease;border:none;outline:none}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover{background-color:var(--primary-hover);transform:translateY(-1px)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn-outline{background-color:transparent;border:1px solid var(--border);color:var(--text-main)}.btn-outline:hover{background-color:#f1f5f9;border-color:var(--text-light)}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:24px;box-shadow:0 4px 6px -1px rgba(0,0,0,.05);transition:transform .2s,box-shadow .2s}.input-field{width:100%;padding:12px 14px;border-radius:8px;border:1px solid var(--border);font-size:15px;background:#fff;transition:border-color .2s}.input-field:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px rgba(15,23,42,.1)}.badge{display:inline-flex;align-items:center;padding:4px 10px;border-radius:99px;font-size:12px;font-weight:700}.badge-blue{background-color:#e0f2fe;color:#0369a1}@keyframes loadingBounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}