/* Authentication Page Styles */
body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.auth-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius-2xl);
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.25),
        0 0 0 1px rgba(255, 255, 255, 0.1);
    width: 100%;
    max-width: 480px;
    padding: var(--spacing-3xl);
    position: relative;
    z-index: 10;
    transition: transform var(--transition-normal);
}

.auth-container:hover {
    transform: translateY(-5px);
}

.auth-form {
    padding: 0;
}

.form-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    color: var(--gray-800);
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
}

.form-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 2px;
}

.input-group {
    position: relative;
    margin-bottom: var(--spacing-xl);
}

.input-group i {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    font-size: 1.1rem;
    transition: all var(--transition-fast);
    z-index: 2;
}

.input-group input {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-lg) 3rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius-lg);
    font-size: 1rem;
    font-weight: 500;
    background: white;
    transition: all var(--transition-fast);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.input-group label {
    position: absolute;
    left: 3rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-500);
    pointer-events: none;
    transition: all var(--transition-fast);
    background-color: white;
    padding: 0 var(--spacing-sm);
    font-size: 1rem;
    font-weight: 500;
}

.input-group input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 
        0 0 0 3px rgba(99, 102, 241, 0.1),
        0 4px 14px rgba(0, 0, 0, 0.1);
    transform: translateY(-1px);
}

.input-group input:focus + label,
.input-group input:valid + label {
    top: 0;
    font-size: 0.75rem;
    color: var(--primary-color);
    font-weight: 600;
}

.input-group input:focus ~ i {
    color: var(--primary-color);
    transform: translateY(-50%) scale(1.1);
}

.btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: var(--spacing-lg) var(--spacing-xl);
    border: none;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 700;
    width: 100%;
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-fast);
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn:hover {
    background: linear-gradient(135deg, var(--primary-dark), #3730a3);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

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

.recover {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.recover a {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.auth-separator {
    text-align: center;
    margin: var(--spacing-xl) 0;
    position: relative;
    color: var(--gray-500);
    font-weight: 500;
}

.auth-separator::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gray-300);
    z-index: 1;
}

.auth-separator span {
    background: white;
    padding: 0 var(--spacing-lg);
    position: relative;
    z-index: 2;
}

.auth-toggle {
    text-align: center;
    color: var(--gray-600);
    font-weight: 500;
}

.auth-toggle a {
    color: var(--primary-color);
    font-weight: 700;
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* Message Styles */
.messageDiv {
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
    text-align: center;
}

.messageDiv.success {
    background-color: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.messageDiv.error {
    background-color: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* Form Animation */
.auth-form.slide-in {
    animation: slideIn 0.5s ease-out;
}

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

/* Loading State */
.btn.loading {
    position: relative;
    color: transparent;
}

.btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Responsive Design */
@media (max-width: 480px) {
    .auth-container {
        margin: var(--spacing-md);
        padding: var(--spacing-xl);
    }
    
    .form-title {
        font-size: 2rem;
    }
    
    .input-group input {
        padding: var(--spacing-md) var(--spacing-sm) var(--spacing-md) 2.5rem;
    }
    
    .input-group label {
        left: 2.5rem;
    }
    
    .input-group i {
        left: var(--spacing-sm);
    }
}