* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    background-color: #f5f5f5;
    padding: 20px;
    font-family: sans-serif;
}

/* 網格容器：桌機與平板橫式每行 4 個 */
.gallery-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    max-width: 1600px;
    margin: 0 auto;
}

.gallery-item {
    position: relative;
    background-color: #000; 
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.2s ease, opacity 0.2s ease;
    cursor: pointer;
    aspect-ratio: 16 / 9; 
}

/* 懸浮效果：往上飄一點點，並且讓稍微變亮或維持原本亮度（這裡用輕微透明度做視覺反饋） */
.gallery-item:hover {
    transform: translateY(-5px);
    opacity: 0.9; /* 滑鼠移上去時有一點點點透，暗示可以點擊 */
}

/* 控制網格內的影片與預覽圖 */
.grid-video {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover; 
}

/* 📱 手機直式：每行 1 個 */
@media (max-width: 768px) {
    .gallery-container {
        grid-template-columns: repeat(1, 1fr);
        gap: 20px;
    }
}

/* 🎬 燈箱彈出視窗（保留原本設定） */
.video-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}
.video-content {
    width: 90%;
    max-width: 800px;
}
.video-content video {
    width: 100%;
    border-radius: 4px;
}
.close-btn {
    position: absolute;
    top: 20px;
    right: 30px;
    color: #fff;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
}