:root {
    /* Colors */
    --primary: #4e73df;
    --primary-dark: #224abe;
    --secondary: #858796;
    --success: #1cc88a;
    --danger: #e74a3b;
    --warning: #f6c23e;
    --info: #36b9cc;
    --light: #f8f9fc;
    --dark: #5a5c69;
    --white: #ffffff;
    --gray: #858796;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Fonts */
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;

    /* Borders */
    --radius-md: 0.375rem;
    --radius-2xl: 1rem;

    /* Shadows */
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition: all 0.3s ease;
}

/* Login Page Styles */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: var(--spacing-md);
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-2xl);
    animation: slideUp 0.5s ease-out;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.login-logo {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    box-shadow: var(--shadow-lg);
}

.login-logo svg {
    width: 40px;
    height: 40px;
    fill: var(--white);
}

.login-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--dark);
    margin-bottom: var(--spacing-xs);
}

.login-subtitle {
    font-size: var(--font-size-sm);
    color: var(--gray);
    margin-bottom: 0;
}

.login-form .form-group {
    margin-bottom: var(--spacing-lg);
}

.login-form .form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--dark);
}

.login-form .form-control {
    width: 100%;
    box-sizing: border-box;
    padding: 0.875rem 1rem;
    font-size: var(--font-size-base);
    border: 2px solid var(--light);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.login-form .form-control:focus {
    border-color: var(--primary);
}

.login-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.remember-me {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.remember-me input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
}

.forgot-password {
    font-size: var(--font-size-sm);
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

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

.login-btn {
    width: 100%;
    padding: 0.875rem;
    font-size: var(--font-size-base);
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    border-radius: var(--radius-md);
    color: var(--white);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.login-footer {
    text-align: center;
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--light);
}

.login-footer p {
    font-size: var(--font-size-sm);
    color: var(--gray);
    margin: 0;
}

/* Loading State */
.login-btn.loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.login-btn.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid var(--white);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Alert Animation */
.alert {
    animation: fadeInDown 0.4s ease-out;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 480px) {
    .login-card {
        padding: var(--spacing-xl);
    }

    .login-title {
        font-size: var(--font-size-xl);
    }
}