/**
 * 動画ポスター画像フォールバック
 */

.hero-video-container {
    position: relative;
    background: linear-gradient(135deg, #1a1f3a 0%, #0a0e27 100%);
    background-image: url('../assets/video-poster.svg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* 動画読み込み前の表示 */
.hero-video[poster] {
    background-color: #0a0e27;
}

/* 動画読み込み中のスケルトン */
.hero-video:not([src]) {
    background: linear-gradient(
        90deg,
        #1a1f3a 0%,
        #2a2f4a 50%,
        #1a1f3a 100%
    );
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
}

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

/* 低速接続時の静的画像表示 */
.hero-static-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}