/**
 * 学習進捗管理 - 柔軟構造対応フロントエンドCSS
 * assets/css/frontend-flexible.css
 */

/* 基本設定 */
.spt-progress-tracker.spt-flexible {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 20px 0;
    --understood-color: #e6f7e6;
    --mastered-color: #ffebcc;
    --primary-color: #0073aa;
    --border-color: #ddd;
    --background-color: #f9f9f9;
    line-height: 1.6;
}

/* デバッグ・エラー表示 */
.spt-no-data {
    text-align: center;
    padding: 40px 20px;
    background: #f8f9fa;
    border: 2px dashed #ddd;
    border-radius: 8px;
    color: #666;
}

.spt-no-data p {
    margin: 10px 0;
    font-size: 16px;
}

/* 科目（進捗バー付きヘッダー） */
.spt-subject-flexible {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    overflow: hidden;
}

/* 科目コンテンツ：デフォルトで非表示 */
.spt-subject-content {
    display: none !important;
    padding: 20px;
    background: white;
}

/* 科目が展開状態の場合のみ表示 */
.spt-subject.expanded .spt-subject-content {
    display: block !important;
}

/* 科目ヘッダー（進捗バー付き） */
.spt-subject-header {
    cursor: pointer;
    transition: background-color 0.2s ease;
    user-select: none;
    padding: 15px 20px 12px 20px;
    background: var(--background-color);
}

.spt-subject-header:hover {
    background-color: #f0f0f0;
}

.spt-subject-title-container {
    width: 100%;
}

.spt-subject-title {
    margin: 0 0 8px 0;
    color: #333;
    font-size: 1.4em;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
}

/* トグルボタン */
.spt-subject-toggle {
    font-size: 0.8em;
    transition: transform 0.2s ease;
    display: inline-block;
    width: 20px;
    text-align: center;
    color: var(--primary-color);
    font-weight: bold;
}

.spt-percent {
    font-weight: normal;
    color: #666;
    font-size: 0.9em;
    margin-left: auto;
    background: white;
    padding: 2px 8px;
    border-radius: 12px;
    border: 1px solid #ddd;
}

/* ヘッダー内進捗バー */
.spt-progress-bar-header {
    height: 6px;
    background: #f1f1f1;
    border-radius: 3px;
    overflow: hidden;
    margin-top: 8px;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.1);
}

.spt-progress-fill-header {
    height: 100%;
    transition: width 0.5s ease;
    border-radius: 3px;
}

/* 章（進捗バー付きヘッダー） */
.spt-chapters {
    display: grid;
    gap: 12px;
}

.spt-chapter {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    transition: all 0.2s ease;
    background: white;
}

/* 章コンテンツ：デフォルトで非表示 */
.spt-chapter-content {
    display: none !important;
    padding: 15px;
    background: white;
    border-top: 1px solid var(--border-color);
}

/* 章が展開状態の場合のみ表示 */
.spt-chapter.expanded .spt-chapter-content {
    display: block !important;
}

.spt-chapter:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.spt-chapter.completed {
    border-color: #4CAF50;
}

.spt-chapter.mastered {
    border-color: #FF9800;
}

.spt-chapter-header {
    background: var(--background-color);
    padding: 12px 15px 8px 15px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.spt-chapter-header:hover {
    background: #f0f0f0;
}

.spt-chapter.completed .spt-chapter-header {
    background: var(--understood-color);
}

.spt-chapter.mastered .spt-chapter-header {
    background: var(--mastered-color);
}

.spt-chapter-title-container {
    width: 100%;
}

.spt-chapter-top {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

/* 章のトグルボタン */
.spt-chapter-toggle {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 50%;
    font-weight: bold;
    font-size: 14px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
    transition: transform 0.2s ease;
    color: var(--primary-color);
}

.spt-chapter-title {
    flex: 1;
    font-weight: 600;
    font-size: 16px;
    color: #333;
}

.spt-chapter-percent {
    font-size: 14px;
    color: #666;
    background: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: 500;
    min-width: 40px;
    text-align: center;
    border: 1px solid #ddd;
}

/* 章内進捗バー */
.spt-progress-bar-chapter {
    height: 4px;
    background: #f1f1f1;
    border-radius: 2px;
    overflow: hidden;
    margin-top: 4px;
    box-shadow: inset 0 1px 1px rgba(0,0,0,0.1);
}

.spt-progress-fill-chapter {
    height: 100%;
    transition: width 0.5s ease;
    border-radius: 2px;
}

/* 節（進捗バー付きヘッダー） */
.spt-section {
    margin-bottom: 15px;
    border: 1px solid #e5e5e5;
    border-radius: 4px;
    overflow: hidden;
    background: white;
}

.spt-section.completed {
    border-color: #4CAF50;
}

.spt-section.mastered {
    border-color: #FF9800;
}

.spt-section-header {
    background: #f8f8f8;
    padding: 10px 12px 6px 12px;
    font-weight: 500;
    font-size: 14px;
}

.spt-section.completed .spt-section-header {
    background: var(--understood-color);
}

.spt-section.mastered .spt-section-header {
    background: var(--mastered-color);
}

.spt-section-title-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.spt-section-title {
    color: #333;
}

.spt-section-percent {
    font-size: 12px;
    color: #666;
    background: white;
    padding: 2px 6px;
    border-radius: 8px;
    min-width: 30px;
    text-align: center;
    border: 1px solid rgba(0,0,0,0.1);
}

/* 節内進捗バー */
.spt-progress-bar-section {
    height: 3px;
    background: #f1f1f1;
    border-radius: 1.5px;
    overflow: hidden;
    margin-top: 2px;
    box-shadow: inset 0 1px 1px rgba(0,0,0,0.1);
}

.spt-progress-fill-section {
    height: 100%;
    transition: width 0.5s ease;
    border-radius: 1.5px;
}

/* 項目 */
.spt-items {
    padding: 12px;
    display: grid;
    gap: 8px;
}

.spt-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    border: 1px solid #f0f0f0;
    border-radius: 4px;
    background: white;
    transition: all 0.2s ease;
}

.spt-item:hover {
    border-color: #ddd;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.spt-item.understood {
    background: var(--understood-color);
    border-color: #c8e6c9;
}

.spt-item.mastered {
    background: var(--mastered-color);
    border-color: #ffcc80;
}

.spt-item-title {
    font-size: 14px;
    font-weight: 500;
    color: #333;
}

.spt-item-checks {
    display: flex;
    gap: 15px;
}

.spt-check-label {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    padding: 6px 10px;
    border-radius: 4px;
    transition: background-color 0.2s ease;
    font-size: 13px;
    user-select: none;
    border: 1px solid transparent;
}

.spt-check-label:hover {
    background-color: rgba(0,115,170,0.1);
    border-color: rgba(0,115,170,0.2);
}

.spt-check-label input {
    cursor: pointer;
    margin: 0;
}

.spt-check-label span {
    font-weight: 500;
}

/* 読み取り専用項目 */
.spt-items-readonly {
    padding: 12px;
    background: #f8f9fa;
    border-radius: 4px;
    margin: 12px;
}

.spt-items-readonly p {
    margin: 0 0 10px 0;
    font-size: 13px;
    color: #666;
}

.spt-items-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.spt-item-readonly {
    background: white;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    color: #666;
    border: 1px solid #e0e0e0;
}

/* コントロールボタン */
.spt-controls {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.spt-reset-btn {
    background: #f9f9f9;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 13px;
    color: #dc3232;
    transition: all 0.2s ease;
    font-weight: 500;
}

.spt-reset-btn:hover {
    background: #f0f0f0;
    border-color: #dc3232;
    color: #a00;
}

/* カウントダウン */
.spt-countdown {
    background: var(--primary-color);
    color: white;
    text-align: center;
    padding: 15px 20px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    margin-top: 20px;
}

.spt-countdown-days {
    font-size: 1.5em;
    font-weight: bold;
    color: #ffeb3b;
    margin: 0 5px;
}

.spt-countdown.post-exam {
    background: #666;
    color: #ccc;
}

/* エラーメッセージ */
.spt-no-structure,
.spt-no-sections {
    text-align: center;
    color: #666;
    font-style: italic;
    padding: 20px;
    background: var(--background-color);
    border-radius: 6px;
    border: 1px dashed var(--border-color);
    margin: 15px 0;
}

/* 処理中状態 */
.spt-item.processing {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.spt-item.processing::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 10px;
    width: 16px;
    height: 16px;
    margin-top: -8px;
    border: 2px solid #ddd;
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 状態の強制設定 */
.spt-subject:not(.expanded) .spt-subject-content {
    display: none !important;
}

.spt-chapter:not(.expanded) .spt-chapter-content {
    display: none !important;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .spt-progress-tracker.spt-flexible {
        margin: 15px 0;
    }
    
    .spt-subject-flexible {
        margin-bottom: 15px;
    }
    
    .spt-subject-header {
        padding: 12px 15px 10px 15px;
    }
    
    .spt-subject-title {
        font-size: 1.2em;
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .spt-percent {
        order: 3;
        margin-left: 0;
        margin-top: 4px;
    }
    
    .spt-subject-content {
        padding: 15px;
    }
    
    .spt-chapter-header {
        padding: 10px 12px 6px 12px;
    }
    
    .spt-chapter-top {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .spt-chapter-percent {
        order: 3;
        margin-top: 4px;
    }
    
    .spt-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .spt-item-checks {
        width: 100%;
        justify-content: flex-start;
    }
    
    .spt-check-label {
        min-height: 40px;
        padding: 8px 12px;
        background: rgba(255,255,255,0.8);
        border: 1px solid rgba(0,0,0,0.1);
        border-radius: 6px;
        flex: 1;
        justify-content: center;
    }
    
    .spt-controls {
        flex-direction: column;
    }
    
    .spt-reset-btn {
        padding: 12px 16px;
        font-size: 14px;
    }
    
    .spt-items-list {
        flex-direction: column;
        gap: 4px;
    }
    
    .spt-item-readonly {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .spt-subject-header {
        padding: 10px 12px 8px 12px;
    }
    
    .spt-subject-content {
        padding: 12px;
    }
    
    .spt-chapter-header {
        padding: 8px 10px 6px 10px;
    }
    
    .spt-chapter-content {
        padding: 12px;
    }
    
    .spt-section-header {
        padding: 8px 10px 4px 10px;
    }
    
    .spt-items {
        padding: 10px;
    }
    
    .spt-item {
        padding: 10px;
    }
    
    .spt-countdown {
        padding: 12px 15px;
        font-size: 14px;
    }
    
    .spt-countdown-days {
        font-size: 1.3em;
    }
    
    .spt-progress-bar-header {
        height: 4px;
    }
    
    .spt-progress-bar-chapter {
        height: 3px;
    }
    
    .spt-progress-bar-section {
        height: 2px;
    }
}

/* 印刷用スタイル */
@media print {
    .spt-controls {
        display: none !important;
    }
    
    .spt-chapter-content {
        display: block !important;
    }
    
    .spt-subject-content {
        display: block !important;
    }
    
    .spt-progress-tracker.spt-flexible {
        box-shadow: none;
    }
    
    .spt-subject-flexible,
    .spt-chapter,
    .spt-section {
        box-shadow: none;
        break-inside: avoid;
    }
    
    .spt-reset-btn {
        display: none;
    }
}

/* フォーカス・アクセシビリティ */
.spt-subject-header:focus,
.spt-chapter-header:focus,
.spt-check-label:focus-within,
.spt-reset-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 高コントラストモード */
@media (prefers-contrast: high) {
    .spt-progress-tracker.spt-flexible {
        --border-color: #000;
        --understood-color: #d4edda;
        --mastered-color: #fff3cd;
    }
    
    .spt-item {
        border-width: 2px;
    }
    
    .spt-check-label:hover {
        background-color: #000;
        color: #fff;
    }
}

/* 進捗バーのアニメーション効果 */
.spt-progress-fill-header,
.spt-progress-fill-chapter,
.spt-progress-fill-section {
    position: relative;
    overflow: hidden;
}

.spt-progress-fill-header::after,
.spt-progress-fill-chapter::after,
.spt-progress-fill-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background-image: linear-gradient(
        -45deg,
        rgba(255, 255, 255, 0.2) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 255, 255, 0.2) 50%,
        rgba(255, 255, 255, 0.2) 75%,
        transparent 75%,
        transparent
    );
    background-size: 20px 20px;
    animation: move 2s linear infinite;
}

@keyframes move {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 20px 20px;
    }
}

/* トグル状態の視覚的フィードバック */
.spt-subject.expanded .spt-subject-toggle {
    transform: rotate(90deg);
}

.spt-chapter.expanded .spt-chapter-toggle {
    transform: rotate(45deg);
}

/* スムーズなトランジション */
.spt-subject-content,
.spt-chapter-content {
    overflow: hidden;
    transition: all 0.3s ease;
}

/* ホバー時の3D効果 */
.spt-subject-flexible:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.spt-chapter:hover {
    transform: translateY(-1px);
}

/* 読み取り専用モード */
.spt-progress-tracker[data-interactive="false"] .spt-chapter-header {
    cursor: default;
}

.spt-progress-tracker[data-interactive="false"] .spt-item-checks {
    display: none;
}

.spt-progress-tracker[data-interactive="false"] .spt-controls {
    display: none;
}