:root{--primary:#6366f1;--primary-dark:#4f46e5;--secondary:#64748b;--success:#10b981;--danger:#ef4444;--google:#4285f4;--bg:#0f172a;--card-bg:#1e293b;--text:#f1f5f9;--text-secondary:#94a3b8;--border:#334155}.auth-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2);padding:20px}.auth-card{width:100%;max-width:500px;background:var(--card-bg);border-radius:16px;padding:40px;box-shadow:0 20px 60px rgba(0,0,0,.3);animation:slideUp .3s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.auth-header h1{font-size:2rem;margin-bottom:8px;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.auth-subtitle{color:var(--text-secondary);margin-bottom:32px}.auth-tabs{display:flex;gap:8px;margin-bottom:24px;background:var(--bg);padding:4px;border-radius:8px}.auth-tab{flex:1;padding:12px;background:transparent;border:none;color:var(--text-secondary);cursor:pointer;border-radius:6px;transition:all .2s;font-weight:500;text-decoration:none;text-align:center;display:block}.auth-tab.active{background:var(--primary);color:white}.auth-tab:hover:not(.active){background:var(--border);color:var(--text)}.auth-form{animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;color:var(--text-secondary);font-weight:500;font-size:.9rem}.form-group input{width:100%;padding:12px 16px;background:var(--bg);border:2px solid var(--border);border-radius:8px;color:var(--text);font-size:1rem;transition:border-color .2s}.form-group input:focus{outline:none;border-color:var(--primary)}.auth-btn{width:100%;padding:14px;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s;display:flex;align-items:center;justify-content:center;gap:8px}.auth-btn-primary{background:var(--primary);color:white}.auth-btn-primary:hover:not(:disabled){background:var(--primary-dark);transform:translateY(-1px)}.auth-btn:disabled{opacity:.6;cursor:not-allowed}.auth-message{margin-top:16px;padding:12px 16px;border-radius:8px;font-size:.9rem;animation:slideDown .3s ease}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.auth-message.success{background:rgba(16,185,129,.2);color:var(--success);border:1px solid var(--success)}.auth-message.error{background:rgba(239,68,68,.2);color:var(--danger);border:1px solid var(--danger)}.auth-btn.loading{position:relative;color:transparent}.auth-btn.loading:after{content:"";position:absolute;width:20px;height:20px;top:50%;left:50%;margin-left:-10px;margin-top:-10px;border:2px solid transparent;border-top-color:white;border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}@media (max-width:600px){.auth-card{padding:24px}.auth-header h1{font-size:1.5rem}}