/* Reset default CSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Body */
body {
    font-family: 'Arial', sans-serif;
    background-color: #d6f0ff; /* Biru Ice */
    color: #333;
    line-height: 1.6;
    padding: 0;
}

/* Navbar */
header {
    background-color: #001f3f; /* Biru tua */
    padding: 20px 0;
    text-align: center;
}

header .logo img {
    width: 150px;
    margin-bottom: 10px;
}

header nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 20px;
}

header nav ul li {
    display: inline-block;
}

header nav ul li a {
    color: #ffffff;
    padding: 10px 15px;
    border-radius: 5px;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 1px;
    transition: background-color 0.3s, transform 0.3s;
}

header nav ul li a:hover {
    background-color: #00e5ff; /* Biru Neon */
    transform: scale(1.1);
}

/* Main Content */
.main-content {
    padding: 50px 10px;
}

.hero {
    text-align: center;
    padding: 50px 0;
}

.hero h1 {
    font-size: 36px;
    margin-bottom: 20px;
    color: #001f3f;
}

.hero p {
    font-size: 18px;
    color: #333;
}

.cta-button {
    background-color: #00e5ff;
    color: #fff;
    padding: 12px 25px;
    border-radius: 5px;
    font-size: 16px;
    text-transform: uppercase;
    font-weight: bold;
    transition: background-color 0.3s;
}

.cta-button:hover {
    background-color: #0077cc;
}

.promotions {
    padding: 50px 0;
    background-color: #ffffff;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    margin-bottom: 50px;
}

.promotions h2 {
    text-align: center;
    font-size: 30px;
    margin-bottom: 30px;
    color: #001f3f;
}

.promo-cards {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.promo-card {
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: 0px 4px 15px rgba(0, 0, 0, 0.1);
    padding: 25px;
    width: 300px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.promo-card:hover {
    transform: translateY(-10px);
    box-shadow: 0px 10px 30px rgba(0, 0, 0, 0.2);
}

.promo-card h3 {
    font-size: 24px;
    color: #001f3f;
    margin-bottom: 15px;
}

.promo-card p {
    font-size: 16px;
    color: #555;
    margin-bottom: 25px;
}

.promo-card a {
    background-color: #00e5ff;
    color: #ffffff;
    padding: 10px 20px;
    border-radius: 5px;
    text-transform: uppercase;
    font-weight: bold;
    transition: background-color 0.3s;
}

.promo-card a:hover {
    background-color: #0077cc;
}

/* Responsive Design */
@media (max-width: 768px) {
    /* Hero Section */
    .hero h1 {
        font-size: 28px;
    }

    .hero p {
        font-size: 16px;
    }

    /* Navbar - toggle for mobile */
    header nav ul {
        flex-direction: column;
        gap: 15px;
    }

    header nav ul li a {
        padding: 15px;
    }

    /* Promo Cards */
    .promo-cards {
        flex-direction: column;
        gap: 15px;
        justify-content: center;
    }

    .promo-card {
        width: 90%;
        margin: 0 auto;
    }

    /* Buttons */
    .cta-button {
        padding: 10px 20px;
        font-size: 14px;
    }

    /* Section padding */
    section {
        padding: 20px 10px;
    }
}

/* Mobile-friendly improvements */
@media (max-width: 480px) {
    .hero h1 {
        font-size: 24px;
    }

    .hero p {
        font-size: 14px;
    }

    .promo-card h3 {
        font-size: 20px;
    }

    .promo-card p {
        font-size: 14px;
    }
}