*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.login-container{width:100%;max-width:420px}.login-box{background:white;border-radius:16px;padding:48px 40px;box-shadow:0 20px 60px rgba(0,0,0,0.3);animation:fadeIn 0.5s ease}@keyframes fadeIn{from{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.login-icon{text-align:center;margin-bottom:24px}.login-icon img{filter:drop-shadow(0 4px 8px rgba(0,0,0,0.2));border-radius:8px}h1{text-align:center;color:#1a202c;font-size:28px;font-weight:700;margin-bottom:8px}.login-subtitle{text-align:center;color:#718096;font-size:15px;margin-bottom:32px}.login-form{margin-bottom:24px}.form-group{margin-bottom:24px}.form-group label{display:block;margin-bottom:8px;color:#2d3748;font-size:14px;font-weight:600}.form-group input{width:100%;padding:14px 16px;border:2px solid #e2e8f0;border-radius:8px;font-size:15px;transition:all 0.2s ease;outline:none;background:white}.form-group input:focus{border-color:#667eea;box-shadow:0 0 0 3px rgba(102,126,234,0.1)}.form-group input:hover{border-color:#cbd5e0}.error-message{background:#fee;color:#c53030;padding:12px 16px;border-radius:8px;font-size:14px;margin-bottom:20px;border:1px solid #fc8181;display:none;animation:shake 0.4s ease}.error-message.show{display:block}@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-10px)}75%{transform:translateX(10px)}}.login-button{width:100%;padding:14px 24px;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:white;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:all 0.3s ease;position:relative;overflow:hidden}.login-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 10px 25px rgba(102,126,234,0.4)}.login-button:active:not(:disabled){transform:translateY(0)}.login-button:disabled{opacity:0.7;cursor:not-allowed}#button-text{display:inline-block;transition:opacity 0.2s ease}.spinner{display:none;width:20px;height:20px;border:3px solid rgba(255,255,255,0.3);border-top-color:white;border-radius:50%;animation:spin 0.8s linear infinite;position:absolute;left:50%;top:50%;margin-left:-10px;margin-top:-10px}@keyframes spin{to{transform:rotate(360deg)}}.login-button.loading #button-text{opacity:0}.login-button.loading .spinner{display:block}.login-footer{text-align:center;padding-top:24px;border-top:1px solid #e2e8f0}.login-footer p{color:#718096;font-size:13px}@media (max-width:480px){.login-box{padding:32px 24px}h1{font-size:24px}.login-subtitle{font-size:14px}}