/**
 * Kashiwazaki SEO Image Viewer - Lightbox CSS
 */

/* ベースリセット */
.ksiv-lightbox *,
.ksiv-lightbox *::before,
.ksiv-lightbox *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Lightbox コンテナ */
.ksiv-lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999999;
    display: none;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: #fff;
}

.ksiv-lightbox.is-active {
    display: block;
}

.ksiv-lightbox.is-visible .ksiv-lightbox-overlay {
    opacity: 1;
}

.ksiv-lightbox.is-visible .ksiv-lightbox-container {
    opacity: 1;
}

/* オーバーレイ */
.ksiv-lightbox-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* メインコンテナ */
.ksiv-lightbox-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* ヘッダー */
.ksiv-lightbox-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.5), transparent);
    z-index: 10;
}

/* カウンター */
.ksiv-lightbox-counter {
    font-size: 16px;
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.ksiv-lightbox-separator {
    margin: 0 4px;
    opacity: 0.7;
}

/* アクションボタン群 */
.ksiv-lightbox-actions {
    display: flex;
    gap: 8px;
}

/* ボタン共通スタイル */
.ksiv-lightbox-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 8px;
    color: #fff;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.1s ease;
}

.ksiv-lightbox-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.ksiv-lightbox-btn:active {
    transform: scale(0.95);
}

.ksiv-lightbox-btn svg {
    width: 24px;
    height: 24px;
}

/* 情報パネルトグルボタン（アクティブ状態） */
.ksiv-lightbox-info-toggle.is-active {
    background: rgba(255, 255, 255, 0.3);
}

/* メインコンテンツエリア */
.ksiv-lightbox-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 80px 60px;
    overflow: hidden;
}

/* ナビゲーションボタン */
.ksiv-lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 80px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 8px;
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease, opacity 0.2s ease;
    z-index: 10;
}

.ksiv-lightbox-nav:hover {
    background: rgba(255, 255, 255, 0.2);
}

.ksiv-lightbox-nav:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.ksiv-lightbox-nav:disabled:hover {
    background: rgba(255, 255, 255, 0.1);
}

.ksiv-lightbox-prev {
    left: 10px;
}

.ksiv-lightbox-next {
    right: 10px;
}

.ksiv-lightbox-nav svg {
    width: 40px;
    height: 40px;
}

/* 画像ラッパー */
.ksiv-lightbox-image-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: calc(100% - 120px);
    max-height: 100%;
    overflow: hidden;
}

/* 画像コンテナ */
.ksiv-lightbox-image-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 100%;
    max-height: 100%;
    cursor: grab;
    overflow: hidden;
}

.ksiv-lightbox-image-container.is-dragging {
    cursor: grabbing;
}

.ksiv-lightbox-image-container.is-zoomed {
    cursor: grab;
}

/* 画像 */
.ksiv-lightbox-image {
    max-width: 100%;
    max-height: calc(100vh - 160px);
    object-fit: contain;
    user-select: none;
    -webkit-user-drag: none;
    transition: transform 0.1s ease-out, opacity 0.3s ease;
    transform-origin: center center;
}

.ksiv-lightbox-image.is-loading {
    opacity: 0;
}

/* ローディング */
.ksiv-lightbox-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: none;
}

.ksiv-lightbox-loading.is-active {
    display: block;
}

.ksiv-lightbox-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid rgba(255, 255, 255, 0.2);
    border-top-color: #fff;
    border-radius: 50%;
    animation: ksiv-spin 0.8s linear infinite;
}

@keyframes ksiv-spin {
    to {
        transform: rotate(360deg);
    }
}

/* 画像情報パネル */
.ksiv-lightbox-info-panel {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: rgba(0, 0, 0, 0.85);
    border-radius: 12px;
    padding: 16px 20px;
    min-width: 320px;
    max-width: 90%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    z-index: 10;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.ksiv-lightbox-info-panel.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.ksiv-lightbox-info-content {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ksiv-lightbox-info-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
}

.ksiv-lightbox-info-label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    white-space: nowrap;
    flex-shrink: 0;
}

.ksiv-lightbox-info-value {
    color: #fff;
    font-size: 13px;
    text-align: right;
    word-break: break-all;
}

.ksiv-lightbox-info-value.is-warning {
    color: #ff9800;
}

/* URL行 */
.ksiv-lightbox-info-url-row {
    flex-direction: column;
    gap: 8px;
}

.ksiv-lightbox-info-url-container {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 12px;
    border-radius: 6px;
    position: relative;
}

.ksiv-info-url {
    flex: 1;
    font-size: 12px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: left;
}

.ksiv-lightbox-copy-url {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 4px;
    color: #fff;
    cursor: pointer;
    transition: background 0.2s ease;
}

.ksiv-lightbox-copy-url:hover {
    background: rgba(255, 255, 255, 0.2);
}

.ksiv-lightbox-copy-feedback {
    position: absolute;
    right: 50px;
    top: 50%;
    transform: translateY(-50%);
    background: #4caf50;
    color: #fff;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
    white-space: nowrap;
}

.ksiv-lightbox-copy-feedback.is-visible {
    opacity: 1;
}

/* ズームコントロール */
.ksiv-lightbox-zoom-controls {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 0, 0, 0.7);
    padding: 8px 12px;
    border-radius: 8px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.ksiv-lightbox-zoom-controls .ksiv-lightbox-btn {
    width: 36px;
    height: 36px;
}

.ksiv-lightbox-zoom-controls .ksiv-lightbox-btn svg {
    width: 20px;
    height: 20px;
}

.ksiv-lightbox-zoom-level {
    min-width: 50px;
    text-align: center;
    font-size: 13px;
    font-weight: 500;
}

/* 画像の拡大アイコン（フロントエンド） */
.ksiv-image-wrapper {
    position: relative;
    display: inline-block;
}

.ksiv-zoom-icon {
    position: absolute;
    width: 28px;
    height: 28px;
    background: rgba(0, 0, 0, 0.65);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.ksiv-image-wrapper:hover .ksiv-zoom-icon {
    opacity: 1;
}

.ksiv-zoom-icon svg {
    width: 18px;
    height: 18px;
    color: #fff;
}

/* 画像単位での位置 */
.ksiv-zoom-icon.position-bottom-right {
    bottom: 8px;
    right: 8px;
}

.ksiv-zoom-icon.position-bottom-left {
    bottom: 8px;
    left: 8px;
}

.ksiv-zoom-icon.position-top-right {
    top: 8px;
    right: 8px;
}

.ksiv-zoom-icon.position-top-left {
    top: 8px;
    left: 8px;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .ksiv-lightbox-content {
        padding: 70px 10px;
    }

    .ksiv-lightbox-nav {
        width: 40px;
        height: 60px;
    }

    .ksiv-lightbox-nav svg {
        width: 30px;
        height: 30px;
    }

    .ksiv-lightbox-prev {
        left: 5px;
    }

    .ksiv-lightbox-next {
        right: 5px;
    }

    .ksiv-lightbox-image-wrapper {
        max-width: calc(100% - 80px);
    }

    .ksiv-lightbox-info-panel {
        min-width: 280px;
        padding: 12px 16px;
        bottom: 100px;
    }

    .ksiv-lightbox-header {
        padding: 12px 16px;
    }

    .ksiv-lightbox-btn {
        width: 40px;
        height: 40px;
    }

    .ksiv-lightbox-counter {
        font-size: 14px;
    }

    .ksiv-lightbox-zoom-controls {
        bottom: 15px;
        padding: 6px 10px;
    }
}

@media (max-width: 480px) {
    .ksiv-lightbox-info-panel {
        min-width: auto;
        width: calc(100% - 32px);
        left: 16px;
        right: 16px;
        transform: translateY(20px);
    }

    .ksiv-lightbox-info-panel.is-visible {
        transform: translateY(0);
    }

    .ksiv-lightbox-info-row {
        flex-direction: column;
        gap: 4px;
    }

    .ksiv-lightbox-info-value {
        text-align: left;
    }
}

/* キーボードフォーカス */
.ksiv-lightbox-btn:focus-visible,
.ksiv-lightbox-nav:focus-visible,
.ksiv-lightbox-copy-url:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 2px;
}

/* 単独画像の場合、ナビゲーションを非表示 */
.ksiv-lightbox.is-single .ksiv-lightbox-nav {
    display: none;
}

.ksiv-lightbox.is-single .ksiv-lightbox-counter {
    display: none;
}

/* アニメーション無効設定への対応 */
@media (prefers-reduced-motion: reduce) {
    .ksiv-lightbox-overlay,
    .ksiv-lightbox-container,
    .ksiv-lightbox-info-panel,
    .ksiv-lightbox-image,
    .ksiv-lightbox-btn,
    .ksiv-lightbox-nav,
    .ksiv-zoom-icon,
    .ksiv-lightbox-copy-feedback {
        transition: none;
    }

    .ksiv-lightbox-spinner {
        animation: none;
    }
}