body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
    color: #333;
}

header {
    background: linear-gradient(135deg, #38a9ce, #4fd1c5);
    color: white;
    text-align: center;
    padding: 2em 1em;
}
header h1 {
    margin: 0;
    font-size: 2.5em;
}

section {
    padding: 2em;
    max-width: 1100px;
    margin: 2em auto;
    background-color: white;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    border-radius: 10px;
}

h2 {
    color: #38a9ce;
    margin-bottom: 1em;
}

.ulul {
    list-style: none;
    padding: 0;
}

.lili {
    padding-left: 30px;
    position: relative;
    margin-bottom: 10px;
}

.lili::before {
    content: "✔";
    position: absolute;
    left: 0;
    color: #38a9ce;
    font-weight: bold;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.gallery-grid img {
    width: 100%;
    height: auto;
    object-fit: cover;
    cursor: pointer;
    border-radius: 8px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.gallery-grid img:hover {
    transform: scale(1.03);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

a {
    color: #38a9ce;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

#lightbox {
    display: none;
    position: fixed;
    z-index: 1000;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

#lightbox.visible {
    opacity: 1;
}

.lightbox-content {
    position: relative;
    animation: popIn 0.3s ease forwards;
}

@keyframes popIn {
    0% {
        transform: scale(0.7);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

#lightbox img {
    max-width: 90%;
    max-height: 90%;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0,0,0,0.4);
    transition: all 0.3s;
}

.close-btn {
    position: absolute;
    top: -15px;
    right: -15px;
    background: #fff;
    color: #333;
    border-radius: 50%;
    width: 35px;
    height: 35px;
    text-align: center;
    line-height: 35px;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    transition: background 0.2s, transform 0.2s;
}

.close-btn:hover {
    background: #ff5555;
    color: #fff;
    transform: scale(1.1);
}


