/* Modern Authentication Styles */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-dark: #5a67d8;
    --secondary: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;
    --dark: #1f2937;
    --light: #f3f4f6;
    --gray: #6b7280;
}

.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

.auth-card {
    background: white;
    border-radius: 24px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    overflow: hidden;
    width: 100%;
    max-width: 480px;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-header {
    background: var(--primary-gradient);
    padding: 40px 40px 60px 40px;
    text-align: center;
    color: white;
    position: relative;
}

.auth-header h1 {
    font-size: 28px;
    margin: 0 0 8px 0;
    font-weight: 700;
}

.auth-header p {
    font-size: 14px;
    opacity: 0.9;
    margin: 0;
}

.auth-wave {
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    line-height: 0;
}

.auth-form-container {
    padding: 40px;
    background: white;
}

.auth-form {
    margin-top: 20px;
}

.form-group {
    margin-bottom: 24px;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark);
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: white;
    font-family: inherit;
}

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

.form-group input.error {
    border-color: var(--danger);
}

.input-icon {
    position: relative;
}

.input-icon input {
    padding-left: 44px;
}

.input-icon i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
    font-size: 18px;
}

.password-toggle {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: var(--gray);
    background: none;
    border: none;
    font-size: 18px;
    padding: 0;
}

.error-message {
    color: var(--danger);
    font-size: 12px;
    margin-top: 6px;
    display: none;
}

.error-message.show {
    display: block;
}

.auth-button {
    width: 100%;
    padding: 14px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-top: 16px;
    font-family: inherit;
}

.auth-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(102, 126, 234, 0.4);
}

.auth-button:active {
    transform: translateY(0);
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid #e5e7eb;
    color: var(--gray);
    font-size: 14px;
}

.auth-footer a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

.auth-footer a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.alert {
    padding: 12px 16px;
    border-radius: 12px;
    margin-bottom: 24px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

.alert i {
    font-size: 18px;
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.6s linear infinite;
    margin-right: 8px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.social-login {
    margin-top: 24px;
}

.social-login-divider {
    text-align: center;
    position: relative;
    margin: 20px 0;
}

.social-login-divider::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 100%;
    height: 1px;
    background: #e5e7eb;
}

.social-login-divider span {
    background: white;
    padding: 0 12px;
    position: relative;
    color: var(--gray);
    font-size: 12px;
}

.social-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.social-button {
    padding: 10px;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    background: white;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}

.social-button:hover {
    border-color: #667eea;
    background: #f9fafb;
}

/* Responsive */
@media (max-width: 640px) {
    .auth-card {
        border-radius: 16px;
    }
    
    .auth-header {
        padding: 30px 30px 50px 30px;
    }
    
    .auth-form-container {
        padding: 30px;
    }
    
    .auth-header h1 {
        font-size: 24px;
    }
}

/* Checkbox styles */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin: 0;
    cursor: pointer;
}

.checkbox-group label {
    margin: 0;
    cursor: pointer;
}

/* Strength meter for password */
.password-strength {
    margin-top: 8px;
    height: 4px;
    border-radius: 2px;
    background: #e5e7eb;
    overflow: hidden;
}

.password-strength-bar {
    height: 100%;
    width: 0;
    transition: width 0.3s, background 0.3s;
}

.password-strength-text {
    font-size: 11px;
    margin-top: 4px;
    color: var(--gray);
}