* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    position: relative;
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.screen {
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.hidden {
    display: none !important;
}

/* Login Container */
.login-container, .user-container {
    padding: 40px 30px;
}

.login-container h2, .user-container h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
    font-weight: 600;
}

/* Form Styles */
.login-form {
    margin-bottom: 20px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

.input-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e1e1e1;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: #667eea;
}

/* Button Styles */
.btn {
    width: 100%;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-google {
    background: white;
    color: #333;
    border: 2px solid #e1e1e1;
    margin-top: 10px;
}

.btn-google:hover {
    background: #f8f9fa;
    border-color: #d1d1d1;
}

.btn-secondary {
    background: #6c757d;
    color: white;
    margin-top: 20px;
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

/* Divider */
.divider {
    text-align: center;
    margin: 20px 0;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #e1e1e1;
}

.divider span {
    background: white;
    padding: 0 20px;
    color: #888;
    font-size: 14px;
}

/* Auth Switch */
.auth-switch {
    text-align: center;
    margin-top: 20px;
}

.auth-switch p {
    color: #666;
    font-size: 14px;
}

.auth-switch a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.auth-switch a:hover {
    text-decoration: underline;
}

/* User Info */
.user-info {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.info-item {
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.info-item:last-child {
    margin-bottom: 0;
}

.info-item strong {
    color: #333;
    font-size: 14px;
}

.info-item span {
    color: #666;
    font-family: 'Courier New', monospace;
    background: white;
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #e1e1e1;
    word-break: break-all;
}

/* Loading Spinner */
.loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading p {
    color: #666;
    font-size: 14px;
}

/* Message Styles */
.message {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 15px 20px;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    z-index: 1000;
    max-width: 90%;
    text-align: center;
}

.message.success {
    background: #28a745;
}

.message.error {
    background: #dc3545;
}

/* Responsive */
@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .login-container, .user-container {
        padding: 30px 20px;
    }
}