/* Mobile-first CSS */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: sans-serif;
    background: #f4f4f4;
    color: #333;
    max-width: 100vw;
    overflow-x: hidden;
}

header {
    background: #fff;
    padding: 1rem;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

main {
    padding: 1rem;
}

.video-item {
    display: flex;
    flex-direction: column;
    margin-bottom: 1rem;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.video-thumbnail {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.video-title {
    font-size: 1rem;
    padding: 0.5rem;
}

.video-views {
    font-size: 0.8rem;
    color: #666;
    padding: 0 0.5rem 0.5rem;
}

.video-player {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 ratio */
    background: #000;
}

.video-player iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

#video-info {
    padding: 1rem 0;
}

#share-btn {
    background: #007bff;
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    margin: 1rem 0;
    width: 100%;
}

#recommendations .video-item {
    flex-direction: row;
    align-items: center;
}

#recommendations .video-thumbnail {
    width: 40%;
    aspect-ratio: 16/9;
}

#recommendations .video-info {
    padding: 0.5rem;
    flex: 1;
}

.banner-placeholder {
    position: sticky;
    bottom: 0;
    background: #ddd;
    text-align: center;
    padding: 1rem;
    font-size: 0.8rem;
}

/* Skeleton loading */
.skeleton-video, .skeleton-player, .skeleton-title, .skeleton-views {
    background: #e0e0e0;
    border-radius: 4px;
    animation: pulse 1.5s infinite;
}

.skeleton-video {
    height: 200px;
    margin-bottom: 1rem;
}

.skeleton-player {
    height: 200px;
}

.skeleton-title {
    height: 1.5rem;
    width: 80%;
    margin-bottom: 0.5rem;
}

.skeleton-views {
    height: 1rem;
    width: 50%;
}

@keyframes pulse {
    0% { background-color: #e0e0e0; }
    50% { background-color: #d0d0d0; }
    100% { background-color: #e0e0e0; }
}

/* Media queries for larger screens */
@media (min-width: 768px) {
    main {
        max-width: 800px;
        margin: 0 auto;
    }

    #video-list {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 1rem;
    }
}