:root {
    --primary: #4361ee;
    --primary-dark: #3a0ca3;
    --primary-light: rgba(67, 97, 238, 0.1);
    --secondary: #6c757d;
    --secondary-light: rgba(108, 117, 125, 0.1);
    --success: #2ecc71;
    --success-dark: #27ae60;
    --info: #00b4d8;
    --info-dark: #0096b4;
    --warning: #f39c12;
    --warning-dark: #e67e22;
    --danger: #e74c3c;
    --danger-dark: #c0392b;
    --light: #f8f9fa;
    --dark: #343a40;
    --gray: #95a5a6;
    --white: #ffffff;
    --border-color: #e9ecef;
    --card-shadow: 0 0.125rem 0.375rem rgba(0, 0, 0, 0.05);
    --card-shadow-hover: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.1);
}

body {
    background-color: #f5f7fb;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: #495057;
    line-height: 1.6;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 450px;
}

.card {
    border: none;
    border-radius: 0.75rem;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    background-color: var(--white);
    overflow: hidden;
}

    .card:hover {
        box-shadow: var(--card-shadow-hover);
        transform: translateY(-3px);
    }

.card-header {
    background: linear-gradient(to right, var(--primary), var(--primary-dark)) !important;
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
}

.card-title {
    font-weight: 600;
    margin-bottom: 0;
    display: flex;
    align-items: center;
    color: white;
}

    .card-title i {
        margin-right: 0.5rem;
    }

.card-body {
    padding: 1.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.form-control {
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
    min-height: 50px;
}

    .form-control:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 0.2rem var(--primary-light);
    }

.input-group-lg > .form-control,
.input-group-lg > .form-select,
.input-group-lg > .input-group-text {
    min-height: 50px;
}

.input-group-text {
    background-color: var(--light);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem 0 0 0.5rem;
    min-height: 50px;
}

.input-group .form-control {
    border-left: none;
    border-radius: 0 0.5rem 0.5rem 0;
}

.remember-forgot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.custom-checkbox .custom-control-input:checked ~ .custom-control-label::before {
    background-color: var(--primary);
    border-color: var(--primary);
}

.forgot-password {
    color: var(--primary);
    font-weight: 500;
}

    .forgot-password:hover {
        color: var(--primary-dark);
        text-decoration: none;
    }

.register-link {
    text-align: center;
    margin-top: 1rem;
    color: #6c757d;
}

    .register-link a {
        color: var(--primary);
        font-weight: 500;
    }

        .register-link a:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }

.btn-login {
    background: linear-gradient(to right, var(--primary), var(--primary-dark));
    border: none;
    border-radius: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
    color: white;
    width: 100%;
    min-height: 50px;
}

    .btn-login:hover {
        background: linear-gradient(to right, var(--primary-dark), var(--primary));
        transform: translateY(-2px);
        box-shadow: var(--card-shadow-hover);
    }

.text-danger {
    color: var(--danger) !important;
    font-size: 0.875rem;
}

.input-validation-error {
    border-color: var(--danger);
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

.validation-summary {
    display: none !important;
}

.field-validation-error {
    display: none !important;
}

@media (max-width: 768px) {
    .login-container {
        padding: 1rem;
    }

    .remember-forgot {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}