body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f7f6;
    color: #333;
    line-height: 1.6;
}

header {
    background-color: #007bff;
    color: white;
    padding: 20px;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header h1 {
    margin: 0;
    font-size: 1.8em;
}

main {
    padding: 20px;
    max-width: 800px;
    margin: 20px auto;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

main p {
    text-align: center;
    margin-bottom: 30px;
    font-size: 1.1em;
}

.button-container {
    display: flex;
    flex-direction: column;
    gap: 15px; /* Spasi antar tombol */
    margin-bottom: 40px;
}

.button {
    display: flex;
    flex-direction: column;
    padding: 18px 25px;
    text-decoration: none;
    border-radius: 8px;
    font-weight: bold;
    text-align: center;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.button span {
    font-size: 1.2em;
    margin-bottom: 5px;
}

.button small {
    font-size: 0.9em;
    opacity: 0.8;
}

.primary-button {
    background-color: #28a745; /* Hijau */
    color: white;
}

.primary-button:hover {
    background-color: #218838;
    transform: translateY(-2px);
}

.secondary-button {
    background-color: #ffc107; /* Kuning */
    color: #333;
}

.secondary-button:hover {
    background-color: #e0a800;
    transform: translateY(-2px);
}

.tertiary-button {
    background-color: #17a2b8; /* Biru muda */
    color: white;
}

.tertiary-button:hover {
    background-color: #138496;
    transform: translateY(-2px);
}

.tips-section {
    border-top: 1px solid #eee;
    padding-top: 30px;
    margin-top: 30px;
}

.tips-section h2 {
    text-align: center;
    color: #007bff;
    margin-bottom: 20px;
    font-size: 1.5em;
}

.tips-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tips-section ul li {
    background-color: #e9f7ef;
    border-left: 5px solid #28a745;
    padding: 10px 15px;
    margin-bottom: 10px;
    border-radius: 4px;
}

footer {
    text-align: center;
    padding: 20px;
    margin-top: 30px;
    background-color: #333;
    color: white;
    font-size: 0.9em;
}

/* Responsif untuk layar lebih besar */
@media (min-width: 768px) {
    .button-container {
        flex-direction: row; /* Tombol berjajar horizontal di layar lebih besar */
        justify-content: center;
    }

    .button {
        flex: 1; /* Agar tombol memiliki lebar yang sama */
        max-width: 30%; /* Batasi lebar maksimum */
    }

    header h1 {
        font-size: 2.5em;
    }
}