/* カタログテーマページ用のスタイル */

.idea-section {
    padding: 3rem 0;
}

.idea-section h2 {
    margin-bottom: 2rem;
    font-size: 1.8rem;
}

/* カタログインデックスページと同じグリッド構造 */
.idea-grid-wrapper,
.theme-grid-wrapper {
    position: relative;
    overflow: visible;
    margin-top: 2rem;
}

.idea-grid,
.theme-grid {
    display: flex;
    gap: 1.5rem;
    overflow-x: auto;
    overflow-y: visible;
    padding-bottom: 1rem;
    padding-top: 4px;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    cursor: grab;
    user-select: none;
    will-change: scroll-position;
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    overscroll-behavior-x: contain;
}

.idea-grid:active,
.theme-grid:active {
    cursor: grabbing;
}

.idea-grid::-webkit-scrollbar,
.theme-grid::-webkit-scrollbar {
    display: none;
}

/* カードスタイル - カタログインデックスページと同じ */
.idea-item,
.theme-card {
    flex: 0 0 auto;
    min-width: 320px;
    width: 320px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    display: block;
    position: relative;
    z-index: 1;
    user-select: none;
    -webkit-user-drag: none;
    scroll-snap-align: start;
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    overflow: hidden;
}

.idea-item {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.idea-item:hover,
.theme-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(141, 208, 255, 0.1);
    z-index: 10;
}

.idea-item h3,
.theme-card h3 {
    margin: 0 0 0.75rem;
    font-size: 1.2rem;
    color: var(--text);
}

.idea-item p,
.theme-card p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-dim);
    line-height: 1.7;
}

/* カード内のコンテンツ */
.idea-item-content {
    padding: 0;
}

/* サムネイル画像 */
.site-preview {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: var(--bg-alt);
    border: none;
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    margin: -1.5rem -1.5rem 0.75rem;
    display: block;
    cursor: pointer;
}

.idea-item .site-preview {
    order: -1;
}

.site-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.site-preview-fallback {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    background:
        radial-gradient(circle at 20% 20%, rgba(141, 208, 255, 0.22), transparent 55%),
        radial-gradient(circle at 80% 30%, rgba(146, 255, 226, 0.18), transparent 55%),
        var(--bg-alt);
    color: var(--text);
}

.site-preview-fallback-inner {
    display: grid;
    gap: 0.5rem;
    justify-items: center;
    text-align: center;
    padding: 0.75rem 1rem;
}

.site-preview-favicon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border);
}

.site-preview-domain {
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.site-preview-url {
    font-size: 0.8rem;
    color: var(--text-dim);
    word-break: break-all;
}

.idea-item:hover .site-preview img,
.theme-card:hover .site-preview img {
    transform: scale(1.05);
}

.site-preview-loading {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dim);
    font-size: 0.9rem;
    background: var(--bg-alt);
}

/* スクロールボタン */
.scroll-button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 20;
    transition: all 0.3s ease;
    opacity: 0;
    pointer-events: none;
    color: var(--text);
    font-size: 1.5rem;
    font-weight: 300;
    backdrop-filter: blur(10px);
    line-height: 1;
}

.scroll-button:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg);
    transform: translateY(-50%) scale(1.1);
}

.scroll-button:active {
    transform: translateY(-50%) scale(0.95);
}

.scroll-button-left {
    left: -24px;
}

.scroll-button-right {
    right: -24px;
}

.idea-grid-wrapper:not(.scroll-start) .scroll-button-left,
.idea-grid-wrapper:not(.scroll-end) .scroll-button-right,
.theme-grid-wrapper:not(.scroll-start) .scroll-button-left,
.theme-grid-wrapper:not(.scroll-end) .scroll-button-right {
    opacity: 1;
    pointer-events: auto;
}

.idea-grid-wrapper.scroll-start .scroll-button-left,
.theme-grid-wrapper.scroll-start .scroll-button-left {
    opacity: 0;
    pointer-events: none;
}

.idea-grid-wrapper.scroll-end .scroll-button-right,
.theme-grid-wrapper.scroll-end .scroll-button-right {
    opacity: 0;
    pointer-events: none;
}

/* レスポンシブ対応 */
@media (min-width: 1040px) {
    .idea-grid-wrapper,
    .theme-grid-wrapper {
        width: calc(320px * 3 + 1.5rem * 2);
        max-width: 100%;
        margin: 0 auto;
    }
}

@media (min-width: 696px) and (max-width: 1039px) {
    .idea-grid-wrapper,
    .theme-grid-wrapper {
        width: calc(320px * 2 + 1.5rem * 1);
        max-width: 100%;
        margin: 0 auto;
    }
}

@media (max-width: 695px) {
    .idea-item,
    .theme-card {
        min-width: 280px;
        width: 280px;
    }
    
    .idea-grid-wrapper,
    .theme-grid-wrapper {
        width: 280px;
        max-width: 100%;
        margin: 0 auto;
    }
    
    .scroll-button {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
    
    .scroll-button-left {
        left: -20px;
    }
    
    .scroll-button-right {
        right: -20px;
    }
}