/* 共通クラス */
.hidden {
    display: none !important;
}

:root {
    --primary-color: #4a6bff;
    --primary-hover: #3a5bee;
    --secondary-color: #f8f9fa;
    --text-color: #333;
    --text-light: #666;
    --border-color: #e0e0e0;
    --card-bg: #fff;
    --hover-bg: #f5f8ff;
    --sidebar-bg: #f0f2f5;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --light-gray: #f8f9fa;
    --gray: #6c757d;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --selected-item: #e3eaff;
}

/* ダークテーマ変数 */
[data-theme="dark"] {
    --primary-color: #5c79ff;
    --primary-hover: #4a6bff;
    --secondary-color: #2d3748;
    --text-color: #e2e8f0;
    --text-light: #a0aec0;
    --border-color: #4a5568;
    --card-bg: #1a202c;
    --hover-bg: #2d3748;
    --sidebar-bg: #171923;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    --selected-item: #3a466b;
    --light-gray: #2d3748;
    --gray: #a0aec0;
}

/* ヘッダーとユーザー情報のスタイル修正 */
.header {
    position: relative;
    z-index: 10;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

.user-info img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.user-name {
    font-weight: 500;
    color: var(--text-color);
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* エディタービューコンテナ */
.editor-view {
    display: none;
}

.editor-view.active {
    display: block;
}

/* エディタコンテナのレイアウト */
.editor-container {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    height: calc(100vh - 220px);
    min-height: 500px;
}

/* 問題リストパネル（左側） */
.problem-list-panel {
    width: 35%;
    min-width: 280px;
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}

.panel-header {
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h2 {
    margin: 0;
    font-size: 1.2rem;
}

.problem-count {
    font-size: 0.9rem;
    color: var(--text-light);
}

.panel-toolbar {
    padding: 10px 15px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.tool-button {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.tool-button:hover {
    background-color: var(--hover-bg);
}

.tool-button i {
    font-size: 1.1rem;
    color: var(--text-color);
}

.tool-button.danger:hover {
    background-color: var(--danger-color);
}

.tool-button.danger:hover i {
    color: white;
}

.search-container {
    position: relative;
    flex-grow: 1;
    flex-basis: 0;
    min-width: 0;
    max-width: 100%;
    overflow: hidden;
    margin-right: 5px;
}

.search-container input {
    width: 100%;
    padding: 8px 12px;
    padding-right: 30px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--card-bg);
    color: var(--text-color);
    box-sizing: border-box;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-container i {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

.problem-list {
    flex-grow: 1;
    overflow-y: auto;
    padding: 10px;
}

/* ソート可能なリスト */
.sortable-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sortable-list li {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 8px;
    padding: 12px 15px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.sortable-list li:hover {
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.sortable-list li.selected {
    background-color: var(--selected-item);
    border-color: var(--primary-color);
}

.sortable-list li.sortable-ghost {
    opacity: 0.5;
    background-color: var(--hover-bg);
}

.sortable-list li .problem-preview {
    font-size: 0.9rem;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 4px;
}

.sortable-list li .problem-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-light);
}

.sortable-list li .drag-handle {
    cursor: grab;
    margin-right: 8px;
    color: var(--text-light);
}

/* 問題編集パネル（右側） */
.problem-edit-panel {
    flex-grow: 1;
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}

.autosave-status {
    font-size: 0.8rem;
    color: var(--text-light);
}

.no-selection-message {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--text-light);
    text-align: center;
}

.no-selection-message i {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.5;
}

.problem-editor {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
}

.problem-editor.hidden {
    display: none;
}

.editor-form {
    max-width: 800px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group .required {
    color: var(--danger-color);
}

/* リッチテキストエディター */
.rich-text-toolbar {
    display: flex;
    gap: 5px;
    margin-bottom: 5px;
    padding: 5px;
    background-color: var(--light-gray);
    border-radius: 4px;
}

.rich-text-toolbar button {
    background: none;
    border: none;
    width: 30px;
    height: 30px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.rich-text-toolbar button:hover {
    background-color: var(--hover-bg);
}

.rich-text-editor {
    min-height: 120px;
    max-height: 300px;
    overflow-y: auto;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--card-bg);
    color: var(--text-color);
}

.rich-text-editor:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(74, 107, 255, 0.25);
}

.rich-text-editor[data-placeholder]:empty:before {
    content: attr(data-placeholder);
    color: var(--gray);
}

.rich-text-editor img {
    max-width: 100%;
    height: auto;
}

.character-counter {
    margin-top: 5px;
    font-size: 0.8rem;
    text-align: right;
    color: var(--text-light);
}

/* 検証フィードバック */
.validation-message {
    padding: 10px 12px;
    border-radius: 4px;
    margin-top: 15px;
}

.validation-message.error {
    background-color: rgba(220, 53, 69, 0.1);
    border-left: 3px solid var(--danger-color);
    color: var(--danger-color);
}

.validation-message.warning {
    background-color: rgba(255, 193, 7, 0.1);
    border-left: 3px solid var(--warning-color);
    color: var(--warning-color);
}

.validation-message.success {
    background-color: rgba(40, 167, 69, 0.1);
    border-left: 3px solid var(--success-color);
    color: var(--success-color);
}

/* アクションボタン */
.action-buttons {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 8px 16px;
    background-color: var(--gray);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.action-btn i {
    font-size: 0.9rem;
}

.action-btn:hover {
    background-color: var(--text-light);
}

/* エディタアクション */
.editor-actions {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
}

.left-actions {
    display: flex;
    gap: 10px;
}

.right-actions {
    display: flex;
    gap: 15px;
}

/* テンプレートビュー */
.templates-container {
    padding: 20px;
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.description {
    color: var(--text-light);
    margin-bottom: 30px;
}

.template-category {
    margin-bottom: 30px;
}

.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 15px;
}

.template-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.template-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: var(--primary-color);
}

.template-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.template-card h4 {
    margin: 0 0 10px 0;
}

.template-card p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-light);
}

.empty-state {
    text-align: center;
    padding: 30px;
    color: var(--text-light);
    background-color: var(--light-gray);
    border-radius: 8px;
    grid-column: 1 / -1;
}

.empty-state i {
    font-size: 1.2rem;
    margin-right: 5px;
}

/* インポートビュー */
.import-container {
    padding: 20px;
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.import-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.import-option {
    background-color: var(--secondary-color);
    border-radius: 8px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.import-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.import-option h3 {
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.import-option p {
    color: var(--text-light);
    margin-bottom: 15px;
}

/* 設定ビュー */
.settings-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.settings-section {
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
}

.settings-section h3 {
    margin-top: 0;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.settings-options {
    display: grid;
    grid-gap: 15px;
}

.settings-option {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.settings-option label {
    display: flex;
    flex-direction: column;
}

.setting-description {
    color: var(--text-light);
    font-size: 0.8rem;
    margin-top: 3px;
}

.settings-select {
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--card-bg);
    color: var(--text-color);
}

/* モダンなトグルスイッチ */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: all 0.3s ease;
    border-radius: 28px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: all 0.3s ease;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-switch:hover .toggle-slider {
    background-color: var(--text-light);
}

.toggle-switch:hover .toggle-slider:before {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

input:checked + .toggle-slider {
    background-color: var(--primary-color);
    box-shadow: inset 0 2px 4px rgba(74, 107, 255, 0.2);
}

input:checked + .toggle-slider:before {
    transform: translateX(24px);
    box-shadow: 0 2px 8px rgba(74, 107, 255, 0.3);
}

input:focus + .toggle-slider {
    box-shadow: 0 0 0 3px rgba(74, 107, 255, 0.25);
}

/* ダークテーマ対応 */
[data-theme="dark"] .toggle-slider {
    background-color: var(--border-color);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .toggle-slider:before {
    background-color: var(--card-bg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] input:checked + .toggle-slider {
    background-color: var(--primary-color);
    box-shadow: inset 0 2px 4px rgba(92, 121, 255, 0.2);
}

[data-theme="dark"] input:checked + .toggle-slider:before {
    box-shadow: 0 2px 8px rgba(92, 121, 255, 0.3);
}

/* プレビューモーダル */
.preview-mode-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.preview-tab {
    padding: 10px 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-light);
    border-bottom: 3px solid transparent;
}

.preview-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.preview-mode {
    display: none;
}

.preview-mode.active {
    display: block;
}

.preview-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    max-width: 500px;
    margin: 0 auto;
}

.card-front,
.card-back {
    padding: 20px;
}

.card-front h3,
.card-back h3 {
    margin-top: 0;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.card-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 0;
}

.test-mode {
    max-width: 600px;
    margin: 0 auto;
}

.test-question-header {
    margin-top: 0;
}

.show-answer-btn {
    margin: 20px 0;
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.test-answer.hidden {
    display: none;
}

#previewCode {
    max-width: 100%;
    overflow-x: auto;
}

.modal-button {
    padding: 8px 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

/* テンプレートファイル */
.template-files {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.template-file {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-color);
    transition: all 0.2s;
}

.template-file:hover {
    border-color: var(--primary-color);
    background-color: var(--hover-bg);
}

.template-file i {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

/* 画像から作成ビュースタイル */
.image-create-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

.image-create-container h2 {
    margin-bottom: 10px;
}

.image-create-container .description {
    color: var(--text-light);
    margin-bottom: 25px;
}

.image-upload-section {
    margin-bottom: 30px;
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 40px 20px;
    text-align: center;
    background-color: var(--secondary-color);
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 20px;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: var(--hover-bg);
}

.upload-area i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    display: block;
}

.upload-area p {
    margin-bottom: 20px;
    color: var(--text-light);
}

.upload-area input[type="file"] {
    display: none;
}

.browse-btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.2s;
}

.browse-btn:hover {
    background-color: var(--primary-hover);
}

.selected-images {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.image-preview-item {
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    padding-bottom: 75%; /* 4:3 aspect ratio */
}

.image-preview-item img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-preview-item .remove-image {
    position: absolute;
    top: 5px;
    right: 5px;
    background-color: rgba(255, 255, 255, 0.7);
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1;
}

.image-preview-item .remove-image:hover {
    background-color: rgba(255, 59, 48, 0.7);
    color: white;
}

.image-generation-options {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.image-generation-options h3 {
    margin-top: 0;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.option-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.option-item {
    margin-bottom: 15px;
}

.option-item.full-width {
    grid-column: 1 / -1;
}

.option-item label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.option-item .form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--card-bg);
    color: var(--text-color);
}

.option-item textarea.form-control {
    min-height: 80px;
}

.option-item .form-text {
    display: block;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 5px;
}

.image-actions {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.primary-btn, .secondary-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
}

.primary-btn:hover {
    background-color: var(--primary-hover);
}

.primary-btn:disabled, .secondary-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.secondary-btn {
    background-color: var(--secondary-color);
    color: var(--text-color);
}

.secondary-btn:hover {
    background-color: var(--border-color);
}

.image-processing-status {
    margin-top: 20px;
}

.status-item {
    background-color: var(--card-bg);
    border-radius: 6px;
    padding: 12px 15px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.status-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.status-pending {
    color: var(--gray);
}

.status-processing {
    color: var(--primary-color);
}

.status-success {
    color: var(--success-color);
}

.status-error {
    color: var(--danger-color);
}

.status-image-name {
    flex-grow: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.status-action {
    margin-left: auto;
}

/* レスポンシブデザイン - 大幅強化版 */

/* ダッシュボードコンテナの基本レスポンシブ */
.dashboard-container {
    display: flex;
    min-height: 100vh;
    flex-direction: row;
}

/* タブレット横向き (1024px以下) */
@media (max-width: 1024px) {
    .dashboard-container {
        flex-direction: column;
    }
    
    .dashboard-sidebar {
        width: 100%;
        height: auto;
        order: -1;
    }
    
    .sidebar-nav ul {
        display: flex;
        overflow-x: auto;
        padding: 10px;
        gap: 10px;
        white-space: nowrap;
    }
    
    .sidebar-nav li {
        flex-shrink: 0;
        padding: 8px 16px;
        border-radius: 20px;
        background-color: var(--card-bg);
        border: 1px solid var(--border-color);
    }
    
    .sidebar-nav li.active {
        background-color: var(--primary-color);
        color: white;
    }
    
    .dashboard-main {
        width: 100%;
        padding: 10px;
    }
    
    .user-info {
        padding: 10px 20px;
        border-bottom: 1px solid var(--border-color);
    }
}

/* タブレット縦向き (992px以下) */
@media (max-width: 992px) {
    .editor-container {
        flex-direction: column;
        height: auto;
        gap: 15px;
    }
    
    .problem-list-panel {
        width: 100%;
        min-width: 100%;
        height: 250px;
        order: 2;
    }
    
    .problem-edit-panel {
        height: auto;
        min-height: 400px;
        order: 1;
    }
    
    .import-options {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 15px;
    }
    
    .template-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 15px;
    }
    
    .image-generation-options .option-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .selected-images {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 10px;
    }
}

/* スマートフォン横向き (768px以下) */
@media (max-width: 768px) {
    /* ヘッダー調整 */
    .top {
        padding: 10px 15px;
        align-items: center;
    }
    
    .top-left {
        gap: 10px;
    }

    .top-left h1 {
        font-size: 1.2rem;
        margin: 0;
    }
    
    /* サイドバーナビゲーション */
    .sidebar-nav ul {
        gap: 5px;
        padding: 5px 10px;
    }
    
    .sidebar-nav li {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
    
    .sidebar-nav li span i {
        margin-right: 4px;
    }
    
    /* メインコンテンツ */
    .dashboard-main {
        padding: 5px;
    }
    
    /* エディタ調整 */
    .problem-list-panel {
        height: 200px;
    }
    
    .panel-toolbar {
        flex-wrap: wrap;
        padding: 10px;
        gap: 8px;
    }
    
    .search-container {
        order: -1;
        width: 100%;
        margin-bottom: 10px;
    }
    
    .action-buttons {
        flex-direction: column;
        width: 100%;
        gap: 8px;
    }
    
    .editor-actions {
        flex-direction: column;
        gap: 15px;
    }
    
    .right-actions {
        justify-content: stretch;
        flex-direction: column;
        gap: 8px;
    }
    
    /* ウェルカム画面 */
    .welcome-options {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 15px;
    }
    
    .welcome-option {
        padding: 20px 15px;
    }
    
    .option-icon {
        font-size: 2rem;
    }
    
    .welcome-option h3 {
        font-size: 1.1rem;
    }
    
    /* インポートオプション */
    .import-options {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .import-option {
        padding: 15px;
    }
    
    .import-icon {
        font-size: 2rem;
    }
    
    /* テンプレート */
    .template-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 10px;
    }
    
    .template-card {
        padding: 15px 10px;
    }
    
    /* 設定画面 */
    .settings-container {
        padding: 15px;
    }
    
    .settings-option {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .toggle-switch {
        align-self: flex-start;
    }
    
    /* 画像アップロード */
    .upload-area {
        padding: 30px 15px;
    }
    
    .upload-area i {
        font-size: 2.5rem;
    }
    
    .selected-images {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 8px;
    }
    
    .image-actions {
        flex-direction: column;
        gap: 10px;
    }
    
    .primary-btn, .secondary-btn {
        width: 100%;
        justify-content: center;
    }
}

/* スマートフォン縦向き (480px以下) */
@media (max-width: 480px) {
    /* ヘッダー */
    .top {
        padding: 12px 15px;
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .top-left {
        align-items: center;
        gap: 10px;
    }
    
    .home-btn {
        font-size: 0.9rem;
        padding: 4px 8px;
    }
    
    .top-left h1 {
        font-size: 1.1rem;
    }
    
    /* サイドバー */
    .user-info {
        padding: 8px 15px;
        flex-direction: column;
        align-items: center;
        gap: 8px;
        text-align: center;
    }
    
    .user-avatar img {
        width: 28px;
        height: 28px;
    }
    
    .user-name {
        font-size: 0.9rem;
    }
    
    .sidebar-nav ul {
        padding: 5px;
        gap: 3px;
    }
    
    .sidebar-nav li {
        padding: 5px 10px;
        font-size: 0.8rem;
    }
    
    /* メインコンテンツ */
    .dashboard-main {
        padding: 5px;
    }
    
    /* ウェルカム画面 */
    .welcome-container {
        padding: 15px;
    }
    
    .welcome-options {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .welcome-option {
        padding: 15px;
    }
    
    .option-icon {
        font-size: 1.8rem;
        margin-bottom: 10px;
    }
    
    .welcome-option h3 {
        font-size: 1rem;
        margin-bottom: 8px;
    }
    
    .welcome-option p {
        font-size: 0.9rem;
        margin-bottom: 12px;
    }
    
    .option-button {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
    
    /* インポート */
    .import-container {
        padding: 15px;
    }
    
    .import-option {
        padding: 12px;
    }
    
    .import-option h3 {
        font-size: 1rem;
        margin-bottom: 8px;
    }
    
    .ai-text-input {
        min-height: 80px;
        font-size: 0.9rem;
    }
    
    .option-controls {
        flex-direction: column;
        gap: 10px;
    }
    
    /* 設定 */
    .settings-section {
        padding: 15px;
        margin-bottom: 15px;
    }
    
    .settings-section h3 {
        font-size: 1.1rem;
        margin-bottom: 15px;
    }
    
    /* 画像作成 */
    .image-create-container {
        padding: 15px;
    }
    
    .upload-area {
        padding: 25px 10px;
    }
    
    .upload-area p {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }
    
    .browse-btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
    
    .selected-images {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
        gap: 6px;
    }
    
    .option-item label {
        font-size: 0.9rem;
        margin-bottom: 4px;
    }
    
    .form-control {
        padding: 8px;
        font-size: 0.9rem;
    }
    
    /* モーダル */
    .modal-container {
        width: 95%;
        margin: 10px;
        max-height: 90vh;
        overflow-y: auto;
    }
    
    .modal-body {
        max-height: 60vh;
    }
    
    .modal-footer {
        flex-direction: column;
        gap: 8px;
    }
    
    .modal-button, .modal-cancel {
        width: 100%;
        justify-content: center;
    }
    
    /* プレビューコンテナ */
    .preview-content {
        max-width: 95%;
        max-height: 85%;
        padding: 15px;
    }
    
    .preview-close {
        top: 8px;
        right: 12px;
        font-size: 20px;
    }
}

/* 極小画面 (320px以下) */
@media (max-width: 320px) {
    .top-left h1 {
        font-size: 1rem;
    }
    
    .sidebar-nav li {
        font-size: 0.75rem;
        padding: 4px 8px;
    }
    
    .welcome-option {
        padding: 12px;
    }
    
    .option-icon {
        font-size: 1.5rem;
    }
    
    .welcome-option h3 {
        font-size: 0.95rem;
    }
    
    .welcome-option p {
        font-size: 0.85rem;
    }
    
    .selected-images {
        grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    }
    
    .upload-area {
        padding: 20px 8px;
    }
    
    .form-control {
        padding: 6px;
        font-size: 0.85rem;
    }
}

/* ランドスケープモード調整 */
@media (max-height: 500px) and (orientation: landscape) {
    .dashboard-container {
        flex-direction: row;
    }
    
    .dashboard-sidebar {
        width: 200px;
        height: 100vh;
        overflow-y: auto;
    }
    
    .sidebar-nav ul {
        flex-direction: column;
        padding: 10px 5px;
    }
    
    .sidebar-nav li {
        width: 100%;
        margin-bottom: 5px;
    }
    
    .user-info {
        padding: 8px;
        border-bottom: 1px solid var(--border-color);
    }
    
    .user-avatar img {
        width: 24px;
        height: 24px;
    }
    
    .user-name {
        font-size: 0.8rem;
    }
    
    .dashboard-main {
        flex: 1;
        height: 100vh;
        overflow-y: auto;
        padding: 10px;
    }
    
    .modal-container {
        max-height: 80vh;
    }
    
    .problem-list-panel {
        height: 150px;
    }
}

/* --- ここから追加 --- */
.modal-content {
    background-color: var(--background-color);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-width: 500px;
    position: relative;
    z-index: 1001;
    animation: modal-appear 0.3s ease-out;
}

/* モーダルのサイズバリエーション */
.modal-content.modal-lg {
    max-width: 800px; /* 大きなモーダルの幅 */
}

.modal-content.modal-sm {
    max-width: 400px; /* 小さなモーダルの幅 */
}


.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
    margin-bottom: 15px;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.4em;
    color: var(--text-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.8em;
    cursor: pointer;
    color: var(--text-color-secondary);
    padding: 5px;
    line-height: 1;
}

.modal-close:hover {
    color: var(--primary-color);
}

.modal-body {
    margin-bottom: 20px;
    max-height: 70vh;
    overflow-y: auto;
}

.modal-body .form-group {
    margin-bottom: 15px;
}

.modal-body .form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: var(--text-color);
}

.modal-body .form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-background);
    color: var(--text-color);
    box-sizing: border-box;
    font-size: 1em; /* フォントサイズを標準化 */
}

.modal-body .form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--primary-color-light);
}

.modal-body textarea.form-control {
    min-height: 80px; /* テキストエリアの最小高さを設定 */
    resize: vertical; /* 垂直方向のリサイズのみ許可 */
}

.modal-body .form-text.text-muted {
    font-size: 0.85em;
    color: var(--text-color-secondary);
    margin-top: 5px;
    display: block;
}


.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.modal-button, .modal-cancel {
    padding: 10px 20px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.2s ease;
    font-size: 1em; /* ボタンのフォントサイズ */
}

.modal-button {
    background-color: var(--primary-color);
    color: white;
}

.modal-button:hover {
    background-color: var(--primary-color-dark);
}

.modal-button.secondary { /* セカンダリボタンのスタイル */
    background-color: var(--secondary-color);
    color: var(--text-color);
}

.modal-button.secondary:hover {
    background-color: var(--border-color);
}

.modal-cancel {
    background-color: var(--secondary-color);
    color: var(--text-color);
}

.modal-cancel:hover {
    background-color: var(--border-color);
}

/* 画像生成モーダルのプレビュー */
.image-preview-container {
    width: 100%;
    max-height: 300px; /* プレビューの高さを制限 */
    overflow: hidden; /* はみ出した部分は隠す */
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--input-background);
}

#uploadedImagePreview {
    max-width: 100%;
    max-height: 100%; /* コンテナの高さに合わせる */
    object-fit: contain; /* アスペクト比を保ちつつフィット */
    display: block;
}


@keyframes modal-appear {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
/* --- 追加ここまで --- */

/* 画像プレビューコンテナ */
.preview-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.preview-container.active {
    display: flex;
}

.preview-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.preview-close {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 24px;
    cursor: pointer;
    color: #666;
    z-index: 1001;
}

.preview-close:hover {
    color: #000;
}

.preview-image {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
    display: block;
    margin: 0 auto;
}