/* 商品詳細ページ: メディアカルーセル */
.media-carousel {
    position: relative;
    background: #000;
}

.media-carousel-viewport {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.media-carousel-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s ease;
}

.media-carousel-slide.is-active {
    opacity: 1;
    visibility: visible;
}

.media-carousel-slide img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
}

.media-carousel-button {
    width: 40px;
    height: 40px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 4px;
    background: rgba(25, 31, 42, 0.92);
    color: #fff;
    font-size: 1.35rem;
    line-height: 1;
    cursor: pointer;
}

.media-carousel-button:hover,
.media-carousel-button:focus-visible {
    background: rgba(0, 176, 255, 0.9);
    outline: 2px solid #fff;
    outline-offset: 2px;
}

.media-carousel-controls {
    display: grid;
    grid-template-columns: 40px minmax(0, 1fr) 40px;
    align-items: center;
    gap: 0.75rem;
    padding: 0.55rem 0.75rem;
    background: #11141b;
}

.media-carousel-dots {
    display: flex;
    justify-content: center;
    gap: 0.55rem;
    padding: 0;
}

.media-carousel-dot {
    width: 10px;
    height: 10px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.55);
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
}

.media-carousel-dot.is-active {
    border-color: var(--accent-color);
    background: var(--accent-color);
}

@media (max-width: 600px) {
    .media-carousel-button {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }
}

/* 商品詳細ページ: ダウンロードボタン */
.download-btn {
    display: block;
    width: 100%;
    box-sizing: border-box;
    margin-top: 0.75rem;
    margin-bottom: 0.75rem;
    padding: 0.85rem 1rem;
    font-size: 0.95rem;
    font-weight: 800;
    text-align: center;
    text-decoration: none;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: #2a2d38;
    color: #64748b;
    cursor: default;
    transition: all 0.3s ease;
    pointer-events: none;
}

.download-btn.ready {
    background: linear-gradient(135deg, #00b0ff 0%, #0077ff 100%);
    color: #ffffff;
    cursor: pointer;
    pointer-events: auto;
    border: none;
    box-shadow: 0 4px 15px rgba(0, 176, 255, 0.4);
}

.download-btn.ready:hover {
    background: linear-gradient(135deg, #00c3ff 0%, #0088ff 100%);
    box-shadow: 0 6px 20px rgba(0, 176, 255, 0.6);
    transform: translateY(-2px);
}

/* 商品詳細ページ: レイアウトとプレビュー */
.detail-container {
    background-color: var(--container-bg);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    border-radius: 4px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
}

.back-link {
    color: var(--accent-color);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    display: inline-block;
    margin-bottom: 1.5rem;
    transition: transform 0.2s;
}

.back-link:hover { transform: translateX(-4px); }

.detail-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.25rem;
    margin-bottom: 2.5rem;
}

.detail-header h2 {
    margin: 0 0 0.5rem 0;
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-color);
}

@media (max-width: 768px) {
    .detail-container { padding: 1.25rem; }
    .detail-header h2 { font-size: 1.5rem; line-height: 1.35; }
    .detail-header { margin-bottom: 1.75rem; }
}

.detail-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 3rem;
}

@media (max-width: 968px) {
    .detail-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 2.5rem;
    }
}

.demo-placeholder-container {
    position: relative;
    width: 100%;
    max-width: 720px;
    background-color: #1a1c23;
    border: 1px solid rgba(0, 176, 255, 0.25);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 1rem;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.demo-video-wrapper,
.checkerboard-pattern {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background-color: #14151a;
    background-image:
        linear-gradient(45deg, #222530 25%, transparent 25%),
        linear-gradient(-45deg, #222530 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #222530 75%),
        linear-gradient(-45deg, transparent 75%, #222530 75%);
    background-size: 24px 24px;
    background-position: 0 0, 0 12px, 12px -12px, -12px 0;
}

.media-badge {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    background-color: rgba(15, 23, 42, 0.85);
    color: #ffffff;
    padding: 0.3rem 0.7rem;
    font-size: 0.75rem;
    font-weight: 800;
    border-radius: 4px;
    z-index: 10;
    pointer-events: none;
    letter-spacing: 0.5px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.demo-mp4-video,
.demo-video-wrapper img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
}