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

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

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

.auth-container {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.language-selector-container {
    position: relative;
}

.language-selector {
    background: white;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 0.9rem;
    color: #333;
    cursor: pointer;
    transition: border-color 0.3s ease;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 16px;
    padding-right: 32px;
}

.language-selector:hover {
    border-color: #667eea;
}

.language-selector:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.auth-header h1 {
    color: #333;
    font-size: 2rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.auth-header p {
    color: #666;
    font-size: 0.9rem;
}

.auth-tabs {
    display: flex;
    margin-bottom: 30px;
    background: #f5f5f5;
    border-radius: 10px;
    padding: 5px;
}

.tab-btn {
    flex: 1;
    padding: 12px;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    color: #666;
}

.tab-btn.active {
    background: white;
    color: #667eea;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.auth-form {
    transition: all 0.3s ease;
}

.auth-form.hidden {
    display: none;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    background: #fafafa;
}

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

.forgot-password {
    text-align: right;
    margin-bottom: 15px;
}

.forgot-password a {
    color: #667eea;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.forgot-password a:hover {
    color: #764ba2;
    text-decoration: underline;
}

.forgot-password-header {
    text-align: center;
    margin-bottom: 25px;
}

.forgot-password-header h3 {
    color: #333;
    font-size: 1.5rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.forgot-password-header p {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.5;
}

.btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: #f8f9fa;
    color: #6c757d;
    border: 2px solid #e9ecef;
}

.btn-secondary:hover {
    background: #e9ecef;
    color: #495057;
    transform: translateY(-1px);
}

.btn-secondary:active {
    transform: translateY(0);
}

/* Social Authentication Section */
.social-auth-section {
    margin-top: 30px;
}

.divider {
    text-align: center;
    margin: 20px 0;
    position: relative;
    display: flex;
    align-items: center;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #e1e5e9;
}

.divider span {
    padding: 0 15px;
    color: #666;
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
}

.btn-google {
    background: white;
    color: #333;
    border: 2px solid #e1e5e9;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-google:hover {
    background: #f8f9fa;
    border-color: #d1d5db;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn-google:active {
    transform: translateY(0);
}

.google-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.auth-message {
    margin-top: 20px;
    padding: 12px;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    min-height: 20px;
}

.auth-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.auth-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.auth-message.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Loading state */
.btn.loading {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn.loading::after {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 8px;
}

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

/* Terms Checkbox */
.terms-group {
    display: flex;
    align-items: center;
    margin-top: 10px;
}
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: #666;
    cursor: pointer;
}
.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    margin: 0;
}
.checkbox-label a {
    color: #667eea;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: #fff;
    margin: 10% auto;
    padding: 0;
    border-radius: 10px;
    width: 90%;
    max-width: 600px;
    animation: modalopen 0.3s;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.modal-header {
    padding: 15px 20px;
    border-bottom: 1px solid #e1e5e9;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
    color: #333;
}

.close-modal-terms {
    color: #aaa;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close-modal-terms:hover,
.close-modal-terms:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
}

.modal-body {
    padding: 20px;
    color: #666;
    font-size: 0.95rem;
    line-height: 1.5;
    max-height: 400px;
    overflow-y: auto;
}

@keyframes modalopen {
    from {opacity: 0; transform: translateY(-20px);}
    to {opacity: 1; transform: translateY(0);}
}

/* Responsive design */
@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .auth-container {
        padding: 30px 20px;
    }
    
    .auth-header h1 {
        font-size: 1.5rem;
    }
}