/* 学習進捗チェックリスト - 3段階理解度対応版（カウントダウン機能削除版） */

:root {
    --primary-color: #1c5aa3;
    --primary-hover: #0f4785;
    --stage1-color: #ffc107;      /* 1段階目：黄色（理解度低） */
    --stage1-hover: #e0a800;
    --stage2-color: #17a2b8;      /* 2段階目：青色（理解度中） */
    --stage2-hover: #138496;
    --stage3-color: #28a745;      /* 3段階目：緑色（理解度高） */
    --stage3-hover: #1e6b34;
    --error-color: #c82333;
    --warning-color: #e0a800;
    --border-color: #c3c4c7;
    --background-light: #f8f9fa;
    --text-color: #1a1a1a;
    --text-muted: #495057;
    --shadow-light: 0 2px 8px rgba(0,0,0,0.12);
    --shadow-medium: 0 4px 16px rgba(0,0,0,0.15);
    --shadow-heavy: 0 6px 20px rgba(0,0,0,0.2);
    --white: #ffffff;
}

#study-checklist-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
    background: transparent;
}

/* カテゴリーセクション */
.category-section {
    margin-bottom: 28px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    background: var(--white);
    transition: all 0.3s ease;
}

.category-section:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-heavy);
}

.category-header {
    background: var(--white);
    padding: 22px 28px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background-color 0.1s ease;
    border-bottom: 2px solid var(--background-light);
    user-select: none;
}

.category-header:hover {
    background: var(--background-light);
    border-bottom-color: var(--primary-color);
}

.category-header:active {
    background: #e9ecef;
}

.category-header h3 {
    margin: 0;
    font-size: 1.5em;
    color: var(--text-color);
    flex: 1;
    font-weight: 700;
}

/* トグルボタン（アコーディオン） */
.toggle-btn {
    background: transparent !important;
    border: none !important;
    color: var(--primary-color) !important;
    font-size: 1.2em !important;
    font-weight: 700 !important;
    cursor: pointer !important;
    padding: 5px 10px !important;
    border-radius: 4px !important;
    transition: all 0.2s ease !important;
    margin-left: 15px !important;
    min-width: 30px !important;
}

.toggle-btn:hover {
    background: var(--background-light) !important;
    color: var(--primary-hover) !important;
}

.toggle-btn.active {
    color: var(--primary-hover) !important;
    background: var(--background-light) !important;
}

.progress-info {
    display: flex;
    align-items: center;
    margin: 0 25px;
}

/* 3段階プログレスバー */
.progress-bar {
    width: 240px;
    height: 14px;
    background: #e9ecef;
    border-radius: 8px;
    overflow: hidden;
    margin-right: 18px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.15);
    border: 1px solid #ced4da;
    position: relative;
}

.progress-fill {
    height: 100%;
    border-radius: 8px;
    transition: width 0.3s ease;
    position: relative;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* 3段階グラデーション */
.progress-fill.mixed-stages {
    background: linear-gradient(90deg, 
        var(--stage1-color) 0%, 
        var(--stage1-color) 33.33%, 
        var(--stage2-color) 33.33%, 
        var(--stage2-color) 66.66%, 
        var(--stage3-color) 66.66%, 
        var(--stage3-color) 100%);
}

.progress-fill.stage1-only {
    background: var(--stage1-color);
}

.progress-fill.stage2-only {
    background: var(--stage2-color);
}

.progress-fill.stage3-only {
    background: var(--stage3-color);
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 2.5s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-text {
    font-weight: 800;
    color: var(--stage3-color);
    min-width: 55px;
    font-size: 1.1em;
}

/* カテゴリーコンテンツ */
.category-content {
    padding: 28px;
    background: var(--white);
    border-top: 2px solid var(--background-light);
    display: none; /* 初期は非表示 */
}

.category-content.show {
    display: block !important;
}

.category-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
    padding-bottom: 22px;
    border-bottom: 2px solid var(--background-light);
    flex-wrap: wrap; /* レスポンシブ対応 */
    gap: 15px;
}

.category-stats p {
    margin: 0;
    color: var(--text-muted);
    font-size: 1.2em;
    font-weight: 600;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 3段階統計表示 */
.stage-stats {
    display: flex;
    gap: 15px;
    align-items: center;
    margin-top: 10px;
    flex-wrap: wrap; /* 小画面対応 */
}

.stage-indicator {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9em;
    font-weight: 600;
}

.stage-indicator .stage-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.stage-indicator.stage1 .stage-dot {
    background: var(--stage1-color);
}

.stage-indicator.stage2 .stage-dot {
    background: var(--stage2-color);
}

.stage-indicator.stage3 .stage-dot {
    background: var(--stage3-color);
}

.reset-category-btn {
    background: #e9ecef;
    color: #6c757d;
    border: 1px solid #dee2e6;
    padding: 8px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.2s ease;
    box-shadow: none;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: unset;
    margin-left: 16px;
}

.reset-category-btn:hover {
    background: #dee2e6;
    color: #495057;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.reset-category-btn:before {
    content: "🗑️";
    font-size: 14px;
}

/* ページネーション */
.pagination-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 25px 0;
    gap: 18px;
}

.pagination-controls button {
    background: var(--primary-color);
    color: var(--white);
    border: 2px solid var(--primary-hover);
    padding: 10px 18px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-light);
}

.pagination-controls button:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.pagination-controls button:disabled {
    background: #95a5a6;
    border-color: #7f8c8d;
    cursor: not-allowed;
    transform: none;
    opacity: 0.7;
}

.page-info {
    font-weight: 700;
    color: var(--text-color);
    min-width: 70px;
    text-align: center;
    font-size: 1.1em;
}

/* ページグリッド - 重要な修正箇所 */
.pages-grid {
    display: grid !important;
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr)) !important;
    gap: 8px !important;
    margin-top: 25px !important;
    width: 100% !important;
    box-sizing: border-box !important;
}

/* 3段階ページボタン - 重要な修正箇所 */
.page-btn {
    width: 40px !important;
    height: 40px !important;
    border: 2px solid #ced4da !important;
    background: var(--white) !important;
    border-radius: 6px !important;
    cursor: pointer !important;
    font-weight: 700 !important;
    font-size: 14px !important;
    transition: all 0.1s ease !important;
    position: relative !important;
    color: var(--text-color) !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    box-shadow: var(--shadow-light) !important;
    box-sizing: border-box !important;
    margin: 0 !important;
    padding: 0 !important;
    min-width: 40px !important;
    max-width: 40px !important;
    min-height: 40px !important;
    max-height: 40px !important;
    outline: none !important;
    -webkit-tap-highlight-color: transparent !important;
    -webkit-touch-callout: none !important;
    -webkit-user-select: none !important;
    -moz-user-select: none !important;
    -ms-user-select: none !important;
    user-select: none !important;
}

.page-btn:hover:not(:disabled) {
    border-color: var(--primary-color) !important;
    background: rgba(28, 90, 163, 0.1) !important;
    transform: translateY(-1px) !important;
    box-shadow: var(--shadow-medium) !important;
    outline: none !important;
}

.page-btn:focus {
    outline: none !important;
    -webkit-tap-highlight-color: transparent !important;
    box-shadow: 0 0 0 2px var(--primary-color) !important;
}

.page-btn:active {
    outline: none !important;
    -webkit-tap-highlight-color: transparent !important;
    transform: translateY(0px) !important;
}

/* 理解度段階別スタイル - 重要な修正箇所 */

/* 1段階目: 理解度低（黄色） */
.page-btn.stage1 {
    background: linear-gradient(135deg, var(--stage1-color), #f0b90b) !important;
    border-color: var(--stage1-hover) !important;
    color: #1a1a1a !important;
    box-shadow: var(--shadow-medium) !important;
    text-shadow: 1px 1px 2px rgba(255,255,255,0.3) !important;
}

.page-btn.stage1:hover {
    background: linear-gradient(135deg, var(--stage1-hover), #d4a509) !important;
    transform: translateY(-1px) !important;
    box-shadow: var(--shadow-heavy) !important;
}

/* 2段階目: 理解度中（青色） */
.page-btn.stage2 {
    background: linear-gradient(135deg, var(--stage2-color), #20c997) !important;
    border-color: var(--stage2-hover) !important;
    color: var(--white) !important;
    box-shadow: var(--shadow-medium) !important;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3) !important;
}

.page-btn.stage2:hover {
    background: linear-gradient(135deg, var(--stage2-hover), #1b9c7c) !important;
    transform: translateY(-1px) !important;
    box-shadow: var(--shadow-heavy) !important;
}

/* 3段階目: 理解度高（緑色） */
.page-btn.stage3 {
    background: linear-gradient(135deg, var(--stage3-color), #34ce57) !important;
    border-color: var(--stage3-hover) !important;
    color: var(--white) !important;
    box-shadow: var(--shadow-medium) !important;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3) !important;
}

.page-btn.stage3:hover {
    background: linear-gradient(135deg, var(--stage3-hover), #25a244) !important;
    transform: translateY(-1px) !important;
    box-shadow: var(--shadow-heavy) !important;
}

.page-btn:disabled {
    opacity: 0.5 !important;
    cursor: not-allowed !important;
    transform: none !important;
}

/* グローバルアクション */
.global-actions {
    text-align: center;
    margin-top: 45px;
    padding-top: 35px;
    border-top: 3px solid var(--background-light);
}

.shortcode-display .global-actions {
    display: none !important;
}

#reset-all-btn {
    background: var(--error-color);
    color: var(--white);
    border: 2px solid #a71e2a;
    padding: 16px 32px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.2em;
    font-weight: 700;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-medium);
}

#reset-all-btn:hover {
    background: #a71e2a;
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

/* メッセージ表示 */
.checklist-message {
    border-radius: 4px !important;
    font-weight: 600;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2) !important;
    border: 1px solid rgba(255,255,255,0.2);
}

.checklist-message-success {
    background: var(--stage3-color) !important;
    border-color: var(--stage3-hover) !important;
}

.checklist-message-error {
    background: var(--error-color) !important;
    border-color: #a71e2a !important;
}

/* 理解度説明パネル */
.understanding-legend {
    background: var(--background-light);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 15px 20px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap; /* レスポンシブ対応 */
    gap: 10px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9em;
    font-weight: 600;
}

.legend-item .color-sample {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: 2px solid #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.legend-item.stage1 .color-sample {
    background: var(--stage1-color);
}

.legend-item.stage2 .color-sample {
    background: var(--stage2-color);
}

.legend-item.stage3 .color-sample {
    background: var(--stage3-color);
}

/* =========== レスポンシブデザイン =========== */

/* スマートフォン中サイズ */
@media (max-width: 768px) {
    #study-checklist-container {
        padding: 15px;
    }
    
    .category-header {
        flex-direction: column;
        align-items: flex-start;
        padding: 18px 22px;
    }
    
    .progress-info {
        margin: 18px 0 12px 0;
        align-self: stretch;
        width: 100%;
    }
    
    .progress-bar {
        width: 100%;
        max-width: 320px;
        flex: 1;
        height: 16px;
    }
    
    .category-content {
        padding: 22px;
    }
    
    .category-stats {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .stage-stats {
        justify-content: flex-start;
        gap: 10px;
    }
    
    .category-stats p {
        font-size: 1.0em;
    }
    
    .reset-category-btn {
        align-self: flex-end;
        margin-left: 0;
        margin-top: 10px;
        width: 32px;
        height: 32px;
    }
    
    .reset-category-btn:before {
        font-size: 12px;
    }
    
    .pages-grid {
        grid-template-columns: repeat(auto-fill, minmax(34px, 1fr)) !important;
        gap: 5px !important;
    }
    
    .page-btn {
        width: 34px !important;
        height: 34px !important;
        min-width: 34px !important;
        max-width: 34px !important;
        min-height: 34px !important;
        max-height: 34px !important;
        font-size: 11px !important;
    }
    
    .page-btn.stage1::after,
    .page-btn.stage2::after,
    .page-btn.stage3::after {
        display: none !important;
    }
    
    .pagination-controls {
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .understanding-legend {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
    
    .legend-item {
        font-size: 0.8em;
    }
    
    .legend-item .color-sample {
        width: 16px;
        height: 16px;
    }
}

/* スマートフォン小サイズ */
@media (max-width: 480px) {
    .category-header h3 {
        font-size: 1.3em;
    }
    
    .category-content {
        padding: 18px;
    }
    
    .category-stats p {
        font-size: 0.9em;
    }
    
    .pages-grid {
        grid-template-columns: repeat(auto-fill, minmax(32px, 1fr)) !important;
        gap: 4px !important;
    }
    
    .page-btn {
        width: 32px !important;
        height: 32px !important;
        min-width: 32px !important;
        max-width: 32px !important;
        min-height: 32px !important;
        max-height: 32px !important;
        font-size: 10px !important;
        border-width: 2px !important;
    }
    
    .page-btn.stage1::after,
    .page-btn.stage2::after,
    .page-btn.stage3::after {
        display: none !important;
    }
    
    .progress-bar {
        height: 14px;
    }
    
    #reset-all-btn {
        padding: 14px 28px;
        font-size: 1.1em;
    }
    
    .reset-category-btn {
        width: 30px;
        height: 30px;
        margin-left: 10px;
    }
    
    .reset-category-btn:before {
        font-size: 11px;
    }
}

/* 極小スマートフォン */
@media (max-width: 360px) {
    .category-stats p {
        font-size: 0.8em;
    }
    
    .pages-grid {
        grid-template-columns: repeat(auto-fill, minmax(30px, 1fr)) !important;
        gap: 3px !important;
    }
    
    .page-btn {
        width: 30px !important;
        height: 30px !important;
        min-width: 30px !important;
        max-width: 30px !important;
        min-height: 30px !important;
        max-height: 30px !important;
        font-size: 9px !important;
    }
    
    .page-btn.stage1::after,
    .page-btn.stage2::after,
    .page-btn.stage3::after {
        display: none !important;
    }
    
    .category-header {
        padding: 15px 18px;
    }
    
    .category-content {
        padding: 15px;
    }
    
    .reset-category-btn {
        width: 28px;
        height: 28px;
        margin-left: 8px;
    }
    
    .reset-category-btn:before {
        font-size: 10px;
    }
}

/* 管理画面用の調整 */
.admin-page .pages-grid {
    gap: 4px !important;
}

.admin-page .page-btn {
    width: 36px !important;
    height: 36px !important;
    min-width: 36px !important;
    max-width: 36px !important;
    min-height: 36px !important;
    max-height: 36px !important;
    font-size: 12px !important;
}

.admin-page .page-btn.stage1::after,
.admin-page .page-btn.stage2::after,
.admin-page .page-btn.stage3::after {
    display: none !important;
}

.admin-page #study-checklist-container {
    background: transparent;
    border: none;
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
}

.admin-page .global-actions {
    display: block !important;
}

/* 管理画面タブコンテンツ */
.tab-content {
    margin-top: 20px;
}

.checklist-content {
    margin-top: 20px;
}

/* ページ表示制御 - 重要な修正箇所 */
.page-btn.hidden {
    display: none !important;
}

.page-btn.visible {
    display: flex !important;
}

/* ショートコード表示時の全体リセットボタン非表示 */
.shortcode-container .global-actions,
.shortcode-container #reset-all-btn {
    display: none !important;
}

/* アクセシビリティ対応 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

/* フォーカス状態の改善 */
.page-btn:focus,
.toggle-btn:focus,
.reset-category-btn:focus,
#reset-all-btn:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: none !important;
    -webkit-tap-highlight-color: transparent !important;
    -webkit-touch-callout: none !important;
    -webkit-user-select: none !important;
    -moz-user-select: none !important;
    -ms-user-select: none !important;
    user-select: none !important;
    box-shadow: 0 0 0 1px var(--primary-color) !important;
}

/* すべての要素のデフォルトアウトライン削除 */
* {
    outline: none !important;
    -webkit-tap-highlight-color: transparent !important;
    -webkit-touch-callout: none !important;
}

*:focus {
    outline: none !important;
    -webkit-tap-highlight-color: transparent !important;
}

*:active {
    outline: none !important;
    -webkit-tap-highlight-color: transparent !important;
}

*:visited {
    outline: none !important;
}

/* ボタン要素の特別処理 */
button,
input[type="button"],
input[type="submit"],
.page-btn,
.reset-category-btn,
#reset-all-btn {
    outline: none !important;
    -webkit-tap-highlight-color: transparent !important;
    -webkit-touch-callout: none !important;
    -webkit-user-select: none !important;
    -moz-user-select: none !important;
    -ms-user-select: none !important;
    user-select: none !important;
}

button:focus,
input[type="button"]:focus,
input[type="submit"]:focus {
    outline: none !important;
    -webkit-tap-highlight-color: transparent !important;
    box-shadow: 0 0 0 1px var(--primary-color) !important;
}

button:active,
input[type="button"]:active,
input[type="submit"]:active {
    outline: none !important;
    -webkit-tap-highlight-color: transparent !important;
}

/* Firefox専用の内部ボーダー削除 */
button::-moz-focus-inner,
input[type="button"]::-moz-focus-inner,
input[type="submit"]::-moz-focus-inner {
    border: 0 !important;
    outline: none !important;
}

/* 印刷時のスタイル */
@media print {
    #study-checklist-container {
        max-width: none;
        padding: 0;
        box-shadow: none;
    }
    
    .category-section {
        page-break-inside: avoid;
        break-inside: avoid;
        border-color: #000 !important;
    }
    
    .reset-category-btn,
    #reset-all-btn,
    .pagination-controls,
    .global-actions {
        display: none !important;
    }
    
    .page-btn {
        border-color: #000 !important;
        color: #000 !important;
        background: white !important;
        box-shadow: none !important;
    }
    
    .page-btn.stage1,
    .page-btn.stage2,
    .page-btn.stage3 {
        background: #e0e0e0 !important;
        border-color: #000 !important;
        color: #000 !important;
    }
}