body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: #333;
    background-image: url('https://source.unsplash.com/1600x900/?construction,tools'); /* Gambar background modern */
    background-size: cover;
    background-position: center;
    position: relative;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6); /* Overlay gelap */
    z-index: 1;
}

.container {
    background-color: #ffffff;
    padding: 40px 60px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    text-align: center;
    max-width: 700px;
    width: 90%;
    position: relative;
    z-index: 2;
    transform: translateY(0);
    animation: fadeIn 1s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header h1 {
    font-size: 2.8em;
    color: #2c3e50;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 15px;
}

.header h1::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: #3498db;
    border-radius: 2px;
}

.content p {
    font-size: 1.2em;
    line-height: 1.8;
    margin-bottom: 25px;
    color: #555;
}

.button {
    display: inline-block;
    background-color: #3498db;
    color: #ffffff;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1.1em;
    transition: background-color 0.3s ease, transform 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.button:hover {
    background-color: #2980b9;
    transform: translateY(-3px);
}

.footer {
    margin-top: 40px;
    border-top: 1px solid #eee;
    padding-top: 20px;
    color: #777;
    font-size: 0.9em;
}

/* Responsiveness */
@media (max-width: 768px) {
    .container {
        padding: 30px;
        width: 95%;
    }
    .header h1 {
        font-size: 2em;
    }
    .content p {
        font-size: 1em;
    }
    .button {
        padding: 12px 25px;
        font-size: 1em;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 20px;
    }
    .header h1 {
        font-size: 1.6em;
    }
    .content p {
        font-size: 0.9em;
    }
}