/**
 * YouTube Facade - Lightweight Lazy Loading
 * Заменяет тяжелые YouTube iframes на легкие превью
 * Загружает видео только при клике пользователя
 */

.youtube-facade {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    background-color: #000;
    cursor: pointer;
    overflow: hidden;
    border-radius: 12px;
}

.youtube-facade img {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.youtube-facade:hover img {
    transform: translate(-50%, -50%) scale(1.05);
}

/* Play Button */
.youtube-facade::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 68px;
    height: 48px;
    background-color: rgba(255, 0, 0, 0.9);
    border-radius: 12px;
    z-index: 1;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.youtube-facade:hover::before {
    background-color: rgba(255, 0, 0, 1);
    transform: translate(-50%, -50%) scale(1.1);
}

/* Play Triangle */
.youtube-facade::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-40%, -50%);
    width: 0;
    height: 0;
    border-left: 20px solid white;
    border-top: 12px solid transparent;
    border-bottom: 12px solid transparent;
    z-index: 2;
    transition: transform 0.3s ease;
}

.youtube-facade:hover::after {
    transform: translate(-40%, -50%) scale(1.1);
}

/* Active state - when iframe is loaded */
.youtube-facade.youtube-facade--active {
    cursor: default;
}

.youtube-facade.youtube-facade--active::before,
.youtube-facade.youtube-facade--active::after {
    display: none;
}

/* Iframe styles */
.youtube-facade iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 12px;
}

/* Loading state */
.youtube-facade.youtube-facade--loading {
    background: linear-gradient(
        90deg,
        #000 25%,
        #333 50%,
        #000 75%
    );
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .youtube-facade::before {
        width: 56px;
        height: 40px;
    }

    .youtube-facade::after {
        border-left: 16px solid white;
        border-top: 10px solid transparent;
        border-bottom: 10px solid transparent;
    }
}

@media (max-width: 480px) {
    .youtube-facade::before {
        width: 48px;
        height: 34px;
        border-radius: 8px;
    }

    .youtube-facade::after {
        border-left: 14px solid white;
        border-top: 8px solid transparent;
        border-bottom: 8px solid transparent;
    }
}