:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --light-bg: #ecf0f1;
    --dark-text: #2c3e50;
    --light-text: #7f8c8d;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

    100% {
        transform: rotate(360deg);
    }
}

.login-container {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    animation: slideUp 0.6s ease-out;
}

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

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

.logo-container {
    text-align: center;
    margin-bottom: 2rem;
}

.logo {
    width: 80px;
    height: 80px;
    margin-bottom: 1rem;
    border-radius: 50%;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.company-name {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.system-name {
    color: var(--light-text);
    font-size: 0.9rem;
    margin-bottom: 0;
}

.form-floating {
    margin-bottom: 1.5rem;
    position: relative;
    transition: transform 0.3s ease;
}

    .form-floating:hover {
        transform: translateY(-2px);
    }

.form-control {
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 1rem 1rem 1rem 3rem;
    font-size: 1rem;
    transition: all 0.3s ease;
}

    .form-control:focus {
        border-color: var(--secondary-color);
        box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
    }

.form-floating label {
    padding-left: 3rem;
    color: var(--light-text);
}

    .form-floating label i {
        position: absolute;
        left: 1rem;
        top: 50%;
        transform: translateY(-50%);
        color: var(--light-text);
    }

.form-check {
    margin-bottom: 1.5rem;
}

.form-check-label {
    color: var(--dark-text);
    font-size: 0.9rem;
}

.btn-login {
    width: 100%;
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
    border: none;
    color: white;
    padding: 1rem;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

    .btn-login:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 16px rgba(52, 152, 219, 0.3);
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    }

.alert {
    border-radius: 12px;
    margin-bottom: 1.5rem;
    border: none;
}

.text-danger {
    font-size: 0.8rem;
    margin-top: 0.25rem;
}

@media (max-width: 480px) {
    .login-container {
        margin: 1rem;
        padding: 2rem;
    }

    .company-name {
        font-size: 1.5rem;
    }
}