/* ==================== 1. デザインシステム (CSS変数) ==================== */
:root {
    --bg-app: #090d16;
    --bg-panel: #111827;
    --bg-card: #1f2937;
    --bg-input: #111827;
    --border-color: #374151;
    --border-glow: rgba(6, 182, 212, 0.2);

    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    /* テーマアクセント (ネオン調) */
    --accent-cyan: #06b6d4;
    --accent-cyan-glow: rgba(6, 182, 212, 0.4);
    --accent-emerald: #10b981;
    --accent-emerald-glow: rgba(16, 185, 129, 0.3);
    --accent-rose: #ef4444;
    --accent-rose-glow: rgba(239, 68, 68, 0.3);
    --accent-amber: #f59e0b;
    --accent-amber-glow: rgba(245, 158, 11, 0.3);

    /* フォントファミリー */
    --font-sans: 'Outfit', 'Noto Sans JP', sans-serif;
    --font-mono: 'Fira Code', monospace;

    /* シャドウと角丸 */
    --shadow-main: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 15px var(--accent-cyan-glow);
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;

    --transition-speed: 0.25s;
}

/* ==================== 2. 基本スタイル & リセット ==================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-app);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-height: 100vh;
    padding: 1rem;
    gap: 1rem;
}

/* ==================== 3. ヘッダー ==================== */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-main);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, #0891b2, #0284c7);
    border-radius: var(--radius-md);
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.4);
}

.logo-icon i {
    width: 20px;
    height: 20px;
    color: white;
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo h1 span {
    color: var(--accent-cyan);
}

/* 問題切り替えナビ */
.question-nav {
    display: flex;
    gap: 0.5rem;
    background-color: rgba(0, 0, 0, 0.2);
    padding: 0.25rem;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    
    /* 横スクロール対応 */
    overflow-x: auto;
    white-space: nowrap;
    max-width: 65%;
    -webkit-overflow-scrolling: touch;
    
    /* スクロールバーをお洒落に表示 (Firefox) */
    scrollbar-width: thin;
    scrollbar-color: var(--accent-cyan) rgba(0, 0, 0, 0.2);
}

/* スクロールバーをお洒落に表示 (Chrome, Safari, Edge) */
.question-nav::-webkit-scrollbar {
    height: 4px; /* 横スクロールバーの高さ */
    display: block;
}

.question-nav::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 999px;
}

.question-nav::-webkit-scrollbar-thumb {
    background: var(--accent-cyan);
    border-radius: 999px;
}

.question-nav::-webkit-scrollbar-thumb:hover {
    background: var(--accent-cyan-glow);
}

.nav-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-speed);
    
    /* ボタンの縮小防止 */
    flex-shrink: 0;
}

.nav-btn:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.nav-btn.active {
    color: var(--bg-app);
    background-color: var(--accent-cyan);
    box-shadow: 0 0 10px var(--accent-cyan-glow);
}

/* ==================== 4. メインレイアウト ==================== */
.app-main {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 1rem;
    flex: 1;
    min-height: 0; /* スクロール制御用 */
}

/* 左側カード: 問題文 */
.problem-intro-card {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-main);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    overflow-y: auto;
}

.problem-header {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.type-tag {
    align-self: flex-start;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--accent-cyan);
    background-color: rgba(6, 182, 212, 0.1);
    padding: 0.25rem 0.6rem;
    border-radius: 9999px;
    border: 1px solid rgba(6, 182, 212, 0.2);
}

.problem-title {
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.3;
}

.problem-body {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    white-space: pre-wrap;
}

/* 右側カード: ワークスペース */
.workspace-card {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-main);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    min-height: 0; /* スクロール制御 */
    overflow-y: auto;
}

.ws-content {
    display: none;
    flex-direction: column;
    height: 100%;
    min-height: 0;
}

.ws-content.active {
    display: flex;
}

/* ==================== 5. 問題形式A: ドラッグ＆ドロップ ==================== */
.topology-container {
    flex: 1;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    border: 1px dashed var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    min-height: 350px;
    overflow-x: auto;
}

.topology-canvas {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* ネットワークノード基本 */
.network-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 140px;
    padding: 1rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-align: center;
    font-size: 0.85rem;
    font-weight: 600;
    gap: 0.5rem;
    transition: all var(--transition-speed);
}

.network-node .node-icon {
    width: 48px;
    height: 48px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    color: var(--accent-cyan);
}

.network-node .node-icon i {
    width: 24px;
    height: 24px;
}

/* コネクタ線 */
.connector-line {
    width: 30px;
    height: 2px;
    background-color: var(--border-color);
    position: relative;
}

.connector-line::after {
    content: '';
    position: absolute;
    right: 0;
    top: -3px;
    width: 8px;
    height: 8px;
    border-top: 2px solid var(--border-color);
    border-right: 2px solid var(--border-color);
    transform: rotate(45deg);
}

/* ネットワークゾーン */
.network-zone {
    border: 2px dashed rgba(6, 182, 212, 0.2);
    border-radius: var(--radius-lg);
    padding: 1.5rem 1rem 1rem 1rem;
    position: relative;
    display: flex;
    justify-content: center;
}

.zone-title {
    position: absolute;
    top: -12px;
    left: 15px;
    background-color: var(--bg-panel);
    padding: 0 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-cyan);
    letter-spacing: 0.5px;
}

.dmz-zone {
    border-color: rgba(245, 158, 11, 0.3);
}
.dmz-zone .zone-title {
    color: var(--accent-amber);
}

.internal-zone {
    border-color: rgba(16, 185, 129, 0.3);
}
.internal-zone .zone-title {
    color: var(--accent-emerald);
}

/* ドロップスロット */
.slot-node {
    border-style: dashed;
    border-color: var(--accent-cyan);
    background-color: rgba(6, 182, 212, 0.02);
    width: 160px;
    min-height: 120px;
    justify-content: center;
}

.slot-label {
    font-size: 0.75rem;
    color: var(--accent-cyan);
    font-weight: 700;
}

.dmz-zone .slot-node {
    border-color: var(--accent-amber);
    background-color: rgba(245, 158, 11, 0.02);
}
.dmz-zone .slot-label {
    color: var(--accent-amber);
}

.internal-zone .slot-node {
    border-color: var(--accent-emerald);
    background-color: rgba(16, 185, 129, 0.02);
}
.internal-zone .slot-label {
    color: var(--accent-emerald);
}

.drop-zone {
    width: 100%;
    min-height: 70px;
    border: 1px dashed rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: rgba(0, 0, 0, 0.15);
    transition: all var(--transition-speed);
}

.drop-zone.hovered {
    background-color: rgba(6, 182, 212, 0.15);
    border-color: var(--accent-cyan);
}

/* ドラッグ可能なアイテム */
.draggable-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    cursor: grab;
    user-select: none;
    transition: all var(--transition-speed);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.draggable-item:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-2px);
    box-shadow: 0 0 12px var(--accent-cyan-glow);
}

.draggable-item:active {
    cursor: grabbing;
}

.draggable-item i {
    color: var(--accent-cyan);
    width: 18px;
    height: 18px;
}

.draggable-item.dragging {
    opacity: 0.4;
    border-style: dashed;
}

/* ドラッグアイテムコンテナ */
.draggable-items-container {
    margin-top: 1.5rem;
    background-color: rgba(0, 0, 0, 0.1);
    padding: 1.25rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.draggable-items-container h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.items-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

/* ドロップされたアイテムのスタイル調整 */
.drop-zone .draggable-item {
    width: 100%;
    justify-content: center;
    font-size: 0.8rem;
    padding: 0.5rem;
    cursor: grab;
}

/* ==================== 6. 問題形式B: ACLテーブル設定 ==================== */
.acl-editor-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    flex: 1;
}

.table-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

.table-responsive {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: rgba(0, 0, 0, 0.15);
}

.acl-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.acl-table th, .acl-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.acl-table th {
    background-color: rgba(0, 0, 0, 0.3);
    color: var(--text-secondary);
    font-weight: 600;
}

.acl-table select, .acl-table input {
    background-color: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    width: 100%;
    outline: none;
    transition: all var(--transition-speed);
}

.acl-table select:focus, .acl-table input:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 5px var(--accent-cyan-glow);
}

/* 暗黙の拒否インフォ */
.implicit-deny-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 0.5rem 0;
}

.badge {
    padding: 0.2rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
}

.badge-deny {
    background-color: rgba(239, 68, 68, 0.15);
    border: 1px solid var(--accent-rose);
    color: var(--accent-rose);
}

/* ==================== 7. 問題形式C: 簡易ターミナル ==================== */
.terminal-container {
    background-color: #05070c;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    display: flex;
    flex-direction: column;
    height: 300px;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.8);
    overflow: hidden;
}

.terminal-header {
    display: flex;
    align-items: center;
    background-color: #121824;
    border-bottom: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    position: relative;
}

.terminal-buttons {
    display: flex;
    gap: 0.4rem;
}

.t-btn {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.t-btn.red { background-color: #ef4444; }
.t-btn.yellow { background-color: #f59e0b; }
.t-btn.green { background-color: #10b981; }

.terminal-title {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.terminal-body {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.terminal-line {
    font-size: 0.85rem;
    line-height: 1.4;
    white-space: pre-wrap;
    word-break: break-all;
}

.command-input-echo {
    color: #38bdf8;
    font-weight: 500;
}

.system-output {
    color: #e2e8f0;
}

.system-error {
    color: var(--accent-rose);
}

.terminal-input-row {
    display: flex;
    align-items: center;
    background-color: #080c14;
    padding: 0.5rem 1rem;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.terminal-prompt {
    color: #10b981;
    font-size: 0.85rem;
    margin-right: 0.5rem;
    user-select: none;
}

#terminal-input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: #e2e8f0;
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

/* ターミナル問題の選択肢 */
.terminal-choices-container {
    margin-top: 1.5rem;
}

.terminal-choices-container h3 {
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.choices-grid {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.choice-option {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.85rem 1.2rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-speed);
}

.choice-option:hover {
    border-color: var(--accent-cyan);
    background-color: rgba(6, 182, 212, 0.02);
}

.choice-option.selected {
    border-color: var(--accent-cyan);
    background-color: rgba(6, 182, 212, 0.05);
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.1);
}

.choice-badge {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    min-width: 24px;
    height: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 700;
}

.choice-option.selected .choice-badge {
    background-color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    color: var(--bg-app);
}

.choice-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.choice-option.selected .choice-text {
    color: var(--text-primary);
}

/* ==================== 8. フッターコントロール ==================== */
.app-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-main);
}

/* 判定ステータス */
.result-status {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1rem;
    padding: 0.4rem 1rem;
    border-radius: var(--radius-md);
    animation: slideIn 0.3s ease-out;
}

.result-status.success {
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--accent-emerald);
    color: var(--accent-emerald);
}

.result-status.error {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--accent-rose);
    color: var(--accent-rose);
}

.result-icon {
    display: flex;
    align-items: center;
}

.result-icon i {
    width: 20px;
    height: 20px;
}

/* ボタン基本 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 700;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-speed);
}

.btn-primary {
    background-color: var(--accent-cyan);
    color: var(--bg-app);
    box-shadow: 0 4px 10px rgba(6, 182, 212, 0.2);
}

.btn-primary:hover {
    background-color: #22d3ee;
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.4);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--text-secondary);
}

.btn-outline {
    background: none;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

.btn-accent {
    background-color: var(--accent-emerald);
    color: var(--bg-app);
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.2);
}

.btn-accent:hover {
    background-color: #34d399;
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.4);
    transform: translateY(-1px);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
}

.btn-danger-sm {
    background-color: rgba(239, 68, 68, 0.15);
    color: var(--accent-rose);
    border: 1px solid var(--accent-rose);
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-speed);
}

.btn-danger-sm:hover {
    background-color: var(--accent-rose);
    color: white;
}

.hidden {
    display: none !important;
}

/* ==================== 9. 解説モーダル ==================== */
.explanation-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-speed) ease-in-out;
}

.explanation-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.explanation-modal {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 650px;
    max-height: 80%;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    transform: scale(0.95);
    transition: transform var(--transition-speed) ease-in-out;
}

.explanation-overlay.active .explanation-modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.btn-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
}

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

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
    white-space: pre-wrap;
}

.modal-body strong {
    color: var(--text-primary);
}

/* ==================== 10. アニメーション ==================== */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 11. レレスポンシブ対応 ==================== */
@media (max-width: 1024px) {
    .app-main {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
    }
    .app-container {
        height: auto;
        max-height: none;
        overflow-y: auto;
    }
    .workspace-card {
        min-height: 450px;
    }
}

/* ==================== 12. 問題形式D: ドロップダウンクイズ ==================== */
.dropdown-quiz-container {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    padding: 0.5rem;
}

.dropdown-quiz-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: border-color var(--transition-speed);
}

.dropdown-quiz-item:hover {
    border-color: rgba(6, 182, 212, 0.5);
}

.dropdown-quiz-label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.dropdown-quiz-select {
    background-color: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.6rem 0.8rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    outline: none;
    width: 100%;
    transition: all var(--transition-speed);
    cursor: pointer;
}

.dropdown-quiz-select:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 5px var(--accent-cyan-glow);
}

.dropdown-quiz-select:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

/* ==================== 13. 謖・､ｺ譖ｸ繝√ぉ繝・け繝ｪ繧ｹ繝・(Linux繧ｿ繝ｼ繝溘リ繝ｫ逕ｨ) ==================== */
.task-instructions-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-main);
}

.instructions-card-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0;
}

.task-checklist {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.task-checklist li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.task-checklist li i {
    flex-shrink: 0;
    margin-top: 2px;
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
}

.task-checklist li.completed {
    color: rgba(255, 255, 255, 0.3) !important;
    text-decoration: line-through;
}

.task-checklist li.completed i {
    color: var(--accent-emerald) !important;
}

/* ==================== 14. 繝€繧､繧｢繧ｰ繝ｩ繝繧ｯ繝ｪ繝・け諡｡螟ｧ讖溯・ ==================== */
#problem-diagram {
    cursor: pointer;
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid transparent;
    transition: all var(--transition-speed);
}

#problem-diagram:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px var(--accent-cyan-glow);
}

.diagram-zoom-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    cursor: pointer;
    transition: color var(--transition-speed);
}

.diagram-zoom-hint:hover {
    color: var(--accent-cyan);
}

.diagram-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(9, 13, 22, 0.95);
    backdrop-filter: blur(8px);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.diagram-modal.active {
    opacity: 1;
    pointer-events: auto;
}

.diagram-modal-content {
    position: relative;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    width: 96vw;
    height: 92vh;
    max-width: 96vw;
    max-height: 92vh;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: auto;
}

#diagram-modal-body {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#diagram-modal-body svg {
    width: 100% !important;
    height: 100% !important;
    max-width: 94vw;
    max-height: 85vh;
    display: block;
}

.diagram-close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all var(--transition-speed);
}

.diagram-close-btn:hover {
    background-color: var(--accent-rose);
    border-color: var(--accent-rose);
    box-shadow: 0 0 10px var(--accent-rose-glow);
}





/* ==================== 13. 指示書チェックリスト (Linuxターミナル用) ==================== */







/* ==================== 15. Mermaidダイアグラム ネオンダークテーマ調整 ==================== */
.mermaid svg .edgePath .path,
.mermaid svg .edgePath path,
.mermaid svg path.path,
.mermaid svg .edgePaths .edgePath path,
#diagram-modal-body svg .edgePath .path,
#diagram-modal-body svg .edgePath path,
#diagram-modal-body svg path.path,
#diagram-modal-body svg .edgePaths .edgePath path {
    stroke: var(--accent-cyan) !important;
    stroke-width: 2px !important;
    fill: none !important;
}

.mermaid svg marker path,
#diagram-modal-body svg marker path {
    fill: var(--accent-cyan) !important;
    stroke: var(--accent-cyan) !important;
}

.mermaid svg .cluster rect,
#diagram-modal-body svg .cluster rect {
    fill: rgba(255, 255, 255, 0.02) !important;
    stroke: var(--border-color) !important;
    stroke-width: 1.5px !important;
    stroke-dasharray: 4, 4 !important;
}

.mermaid svg .cluster rect:first-of-type,
#diagram-modal-body svg .cluster rect:first-of-type {
    fill: rgba(255, 255, 255, 0.02) !important;
}

.mermaid svg .node rect,
.mermaid svg .node circle,
.mermaid svg .node polygon,
#diagram-modal-body svg .node rect,
#diagram-modal-body svg .node circle,
#diagram-modal-body svg .node polygon {
    fill: var(--bg-card) !important;
    stroke: var(--accent-cyan) !important;
    stroke-width: 1.5px !important;
}

.mermaid svg .node .label,
#diagram-modal-body svg .node .label {
    color: var(--text-primary) !important;
    font-weight: 500 !important;
}

.mermaid svg .cluster text,
#diagram-modal-body svg .cluster text {
    fill: var(--accent-cyan) !important;
    font-weight: bold !important;
}

.mermaid svg .edgeLabel,
#diagram-modal-body svg .edgeLabel {
    color: var(--text-secondary) !important;
    font-size: 0.8rem !important;
}

.mermaid svg .edgeLabel rect,
#diagram-modal-body svg .edgeLabel rect {
    fill: var(--bg-panel) !important;
    opacity: 0.9 !important;
}