.container.mt-5 {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 150px); 
    padding: 20px;
    flex-grow: 1;
}

.row.justify-content-center {
    width: 100%;
    display: flex;
    justify-content: center;
}

.col-md-6 {
    flex: 0 0 100%;
    max-width: 500px;
}


.card {
    background-color: #1e1e1e;
    border: 1px solid #333;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    color: #e0e0e0;
    width: 100%;
    animation: fadeIn 0.5s ease-in-out;
}

.card-header {
    background-color: #252525;
    border-bottom: 1px solid #333;
    padding: 20px;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    text-align: center;
}

.card-header h1 {
    margin: 0 0 10px 0;
    font-size: 1.8rem;
    color: #00ffcc; 
}

.card-header p {
    margin: 0;
    color: #a0a0a0;
}

.card-body {
    padding: 30px;
    text-align: center;
}

.btn.btn-primary {
    background-color: #00ffcc;
    color: #121212;
    border: none;
    padding: 12px 25px;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.btn.btn-primary:hover {
    background-color: #00e6b8;
    transform: translateY(-2px);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 480px) {
    .card-body {
        padding: 20px;
    }

    .card-header h1 {
        font-size: 1.5rem;
    }
    .btn.btn-primary {
        font-size: 1rem;
    }
}