/* ===== CSS Variables (Design Tokens) ===== */
:root {
    --color-primary: #10598A;
    --color-primary-hover: #0d4a73;
    --color-primary-light: #e8f2f8;
    --color-primary-glow: rgba(16, 89, 138, 0.15);
    --color-accent: #0e7fbd;
    --color-success: #06d6a0;
    --color-danger: #ef476f;
    --color-bg: #f0f2f8;
    --color-bg-card: #ffffff;
    --color-bg-subtle: #f7f8fc;
    --color-text: #1e1e2e;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.04);
    --shadow-glow: 0 0 20px var(--color-primary-glow);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Segoe UI', 'Yu Gothic UI', 'Meiryo', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 15px;
    overflow-y: scroll;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ===== Container ===== */
.container {
    width: 84%;
    max-width: 1200px;
    min-width: 900px;
    margin: 0 auto;
    padding: 24px 16px;
}

/* ===== Header ===== */
h1 {
    text-align: center;
    margin-bottom: 24px;
    color: var(--color-text);
    font-size: 1.4em;
    font-weight: 700;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

/* ===== Floating Search Bar ===== */
.floating-search {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-bg-card);
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--color-border);
    padding: 10px 16px;
    transform: translateY(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.floating-search.visible {
    transform: translateY(0);
}
.floating-search-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    gap: 12px;
    align-items: center;
}
.floating-title {
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    font-size: 13px;
    font-weight: 700;
    color: var(--color-text);
    flex-shrink: 0;
}
.floating-logo {
    height: 22px;
}
.floating-search-inner input {
    flex: 1;
    height: 38px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0 14px;
    font-size: 14px;
    font-family: inherit;
    color: var(--color-text);
    background: var(--color-bg-subtle);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.floating-search-inner input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}
.floating-search-inner .btn {
    padding: 8px 20px;
    font-size: 14px;
    flex-shrink: 0;
}

/* ===== Input Area ===== */
.input-area {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-md);
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    border: 1px solid var(--color-border-light);
    transition: box-shadow var(--transition-base);
}
.input-area:focus-within {
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: rgba(67, 97, 238, 0.2);
}

textarea {
    width: 100%;
    max-width: 640px;
    height: 110px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    font-size: 15px;
    resize: vertical;
    font-family: inherit;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg-subtle);
    transition: border-color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
}
textarea::placeholder {
    color: var(--color-text-muted);
}
textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: #fff;
    box-shadow: 0 0 0 4px var(--color-primary-glow);
}

.btn-row {
    display: flex;
    justify-content: flex-end;
    margin-top: 12px;
    gap: 12px;
    align-items: center;
    width: 100%;
    max-width: 640px;
}

.btn {
    background: var(--color-primary);
    color: #fff;
    border: none;
    padding: 10px 32px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
    letter-spacing: 0.02em;
}
.btn:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(16, 89, 138, 0.3);
}
.btn:active {
    transform: translateY(0) scale(0.98);
}
.btn:disabled {
    background: var(--color-border);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.hint {
    color: var(--color-text-muted);
    font-size: 13px;
}

.ai-disclaimer {
    margin: 12px 0px -14px 0px;
    color: var(--color-text-muted);
    font-size: 12px;
    text-align: center;
}

/* ===== Loading Animation ===== */
.loading {
    display: none;
    padding: 32px 20px;
}
.loading.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.loading-container {
    max-width: 520px;
    margin: 0 auto;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border-light);
}

.loading-title {
    font-size: 16px;
    color: var(--color-text);
    font-weight: 700;
    margin-bottom: 20px;
    text-align: center;
}

.loading-steps {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.loading-step {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    background: var(--color-bg-subtle);
    border-radius: var(--radius-sm);
    border-left: 3px solid transparent;
    transition: all var(--transition-slow);
    opacity: 0.35;
}
.loading-step.active {
    opacity: 1;
    border-left-color: var(--color-primary);
    background: var(--color-primary-light);
    transform: translateX(4px);
}
.loading-step.done {
    opacity: 0.6;
    border-left-color: var(--color-success);
    background: #f0fdf4;
}

.loading-step-icon {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}
.loading-step-icon .spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 2.5px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}
.loading-step.active .loading-step-icon .spinner { display: inline-block; }
.loading-step.active .loading-step-icon .icon-default { display: none; }
.loading-step.done .loading-step-icon .icon-default { display: none; }
.loading-step.done .loading-step-icon::after {
    content: '\2713';
    color: var(--color-success);
    font-weight: bold;
    font-size: 18px;
}

.loading-step-text {
    font-size: 14px;
    color: var(--color-text-secondary);
}
.loading-step.active .loading-step-text {
    font-weight: 600;
    color: var(--color-text);
}

.loading-dots::after {
    content: '';
    animation: dots 1.5s steps(4, end) infinite;
}
@keyframes dots {
    0% { content: ''; } 25% { content: '.'; } 50% { content: '..'; } 75% { content: '...'; }
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-progress {
    margin-top: 18px;
    height: 4px;
    background: var(--color-border);
    border-radius: 2px;
    overflow: hidden;
}
.loading-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), #1a7ab5);
    border-radius: 2px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    width: 0%;
    position: relative;
}
.loading-progress-bar::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 1.5s infinite;
}
@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ===== Result Question ===== */
.result-question {
    width: 100%;
    font-weight: 600;
    color: var(--color-text);
    font-size: 15px;
    white-space: pre-wrap;
    line-height: 1.6;
    padding: 14px 18px;
    background: #fff;
    border: 3px solid var(--color-primary);
    border-radius: var(--radius-sm);
    margin-bottom: 4px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}
.result-question::before {
    content: '質問';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 2px 10px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 1px;
    white-space: nowrap;
}
.result-question:empty { display: none; }

/* ===== Result Area: Left-Right Layout ===== */
.result {
    margin-bottom: 20px;
    display: none;
    gap: 16px;
    animation: slideUp 0.4s ease;
    flex-wrap: wrap;
}
.result.active { display: flex; }

@keyframes slideUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.result-left {
    flex: 1;
    min-width: 0;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: 24px 28px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border-light);
}
.result-right {
    width: 290px;
    flex-shrink: 0;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border-light);
}
.result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 8px;
}
.btn-pdf {
    background: var(--color-bg-subtle);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    padding: 5px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
    white-space: nowrap;
}
.btn-pdf:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-1px);
}
.result h3,
.history-item h3 {
    margin-bottom: 14px;
    color: var(--color-text);
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 8px;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: -0.01em;
}
/* result-header内のh3はborderを消す（headerが持つため） */
.result-header h3,
.history-item .result-header h3 {
    margin: 0;
    border: none;
    padding: 0;
}

/* ===== Answer Text ===== */
.answer {
    line-height: 1.7;
    font-size: 15px;
}
.answer h1 {
    font-size: 1.05em;
    margin: 16px 0 12px;
    color: #fff;
    background: linear-gradient(135deg, var(--color-primary), #1a7ab5);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    display: block;
    text-align: left;
    letter-spacing: 0;
}
.answer h1:first-child { margin-top: 0; }
.answer h2 {
    font-size: 1.15em;
    margin: 14px 0 8px;
    color: var(--color-text);
    padding-bottom: 6px;
    border-bottom: 2px solid var(--color-primary-light);
}
.answer h3 {
    font-size: 1.05em;
    margin: 10px 0 4px;
    color: var(--color-text);
    border: none;
    padding: 0;
}
.answer p, .answer br + br { margin: 0; }
.answer ul, .answer ol { margin: 4px 0 4px 20px; }
.answer li { margin-bottom: 2px; line-height: 1.6; }

/* ===== Step List (番号付きリストのステップバッジ表示) ===== */
.answer ol.step-list {
    list-style: none;
    margin: 12px 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.answer ol.step-list .step-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: var(--color-bg-subtle);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    line-height: 1.6;
    transition: background var(--transition-fast), box-shadow var(--transition-fast);
}
.answer ol.step-list .step-item:hover {
    background: var(--color-primary-light);
    box-shadow: var(--shadow-sm);
}
.answer ol.step-list .step-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 26px;
    height: 26px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 1px;
    letter-spacing: 0;
}
.answer table {
    border-collapse: collapse;
    margin: 10px 0;
    font-size: 14px;
    width: 100%;
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.answer th, .answer td {
    border: 1px solid var(--color-border);
    padding: 8px 14px;
    text-align: left;
}
.answer th {
    background: var(--color-primary-light);
    font-weight: 600;
    color: var(--color-text);
}
.answer tr:nth-child(even) { background: var(--color-bg-subtle); }
.answer tr:hover { background: #e8f2f8; }
.answer blockquote {
    color: var(--color-primary-hover);
    border-left: 3px solid var(--color-primary);
    padding: 6px 16px;
    margin: 8px 0;
    background: var(--color-primary-light);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.answer code {
    background: var(--color-primary-light);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
    color: var(--color-primary-hover);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}
.answer pre {
    background: #0d1117;
    color: #e6edf3;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 16px 0;
    border: 1px solid #30363d;
    position: relative;
}
.answer pre code,
.answer pre code.hljs {
    background: none;
    padding: 14px 20px 16px;
    color: inherit;
    font-size: 13.5px;
    line-height: 1.75;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    display: block;
}
.answer hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 8px 0;
}
.answer .quote {
    color: var(--color-primary-hover);
    border-left: 3px solid var(--color-primary);
    padding-left: 12px;
    margin: 4px 0;
    display: block;
}
.answer a.pdf-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 1px dashed var(--color-primary);
    transition: color var(--transition-fast), border-color var(--transition-fast);
}
.answer a.pdf-link:hover {
    color: var(--color-primary-hover);
    border-bottom-style: solid;
}
.mermaid-chart {
    background: var(--color-bg-subtle);
    border-radius: var(--radius-md);
    padding: 12px;
    margin: 10px 0;
    text-align: center;
    overflow-x: auto;
    border: 1px solid var(--color-border-light);
}
.mermaid-chart svg { max-width: 100%; height: auto; }

/* ===== Sources ===== */
.sources h4 {
    margin-bottom: 12px;
    color: var(--color-text);
    font-size: 15px;
    font-weight: 700;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 8px;
    letter-spacing: -0.01em;
}
.source-item {
    background: var(--color-bg-subtle);
    border: 1px solid var(--color-border-light);
    border-left: 4px solid var(--color-primary);
    padding: 12px 14px;
    margin-bottom: 10px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 14px;
    line-height: 1.5;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.source-item:hover {
    transform: translateX(2px);
    box-shadow: var(--shadow-sm);
}
.source-item .source-rank {
    font-size: 18px;
    min-width: 24px;
    text-align: center;
    filter: grayscale(0.2);
}
.source-item .source-body { flex: 1; min-width: 0; }
.source-item .source-label {
    font-weight: 600;
    margin-bottom: 4px;
    font-size: 13px;
}
.source-item a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}
.source-item a:hover {
    text-decoration: underline;
    color: var(--color-primary-hover);
}
.source-item .preview {
    color: var(--color-text-muted);
    font-size: 12px;
    margin-top: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
}
.source-item .pdf-preview-toggle {
    display: inline-block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--color-primary);
    cursor: pointer;
    user-select: none;
    font-weight: 500;
}
.source-item .pdf-preview-toggle:hover { text-decoration: underline; }
.source-item .pdf-preview-frame {
    margin-top: 8px;
    display: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.source-item .pdf-preview-frame.open { display: block; }
.source-item .pdf-preview-frame iframe { width: 100%; height: 280px; border: none; }

/* ===== History ===== */
.history { margin-top: 48px; }
.history-item {
    margin-bottom: 48px;
    animation: fadeIn 0.3s ease;
}
.history-item .q {
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 10px;
    font-size: 15px;
    white-space: pre-wrap;
    display: flex;
    align-items: center;
    gap: 6px;
}
.history-item .q::before {
    content: 'Q';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}
.history-item .history-body {
    display: flex;
    gap: 16px;
}
.history-item .result-left,
.history-item .result-right {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: 18px 22px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}
.history-item .result-left { flex: 1; min-width: 0; }
.history-item .result-right { width: 340px; flex-shrink: 0; }
.history-item .result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 8px;
}
.history-item .result-header h3 {
    margin: 0;
    border: none;
    padding: 0;
}

/* ===== Print ===== */
@page { margin: 10mm 15mm; }
@media print {
    /* 全体リセット */
    body { background: #fff; font-size: 11px; }
    .container { width: 100%; min-width: 0; padding: 0; margin: 0; }

    /* 不要な要素を全て非表示 */
    .floating-search, .input-area, .loading, .btn-pdf { display: none !important; }

    /* タイトルを印刷用デザインで表示 */
    h1 {
        display: flex !important;
        justify-content: center;
        font-size: 18px;
        font-weight: 700;
        color: #000;
        margin-bottom: 16px;
        padding: 10px 0;
        border-bottom: 3px solid #000;
        letter-spacing: 0.05em;
    }
    h1 img { display: none; }

    /* 印刷対象でない要素を非表示 */
    .result:not(.print-target) { display: none !important; }
    .history-item:not(.print-target) { display: none !important; }

    /* 印刷対象の共通スタイル */
    .print-target { display: block !important; box-shadow: none; }

    /* 印刷対象が最新回答(.result)の場合 */
    .result.print-target { gap: 0; }

    /* 印刷対象が履歴(.history-item)の場合 */
    .history-item.print-target .q { display: none; }
    .history-item.print-target .history-body { display: block; }

    /* 質問文を印刷時に表示（実DOM要素で改行を保持） */
    .print-target .result-question {
        display: flex !important;
        font-size: 13px;
        padding: 8px 12px;
        margin-bottom: 12px;
        border-radius: 4px;
        white-space: pre-wrap;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    .print-target .result-question::before {
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    /* 回答エリアを1カラムに */
    .print-target .result-left {
        width: 100%;
        padding: 0;
        box-shadow: none;
        border: none;
        background: none;
    }
    .print-target .result-header { border-bottom: none; margin-bottom: 8px; }
    .print-target .result-header h3 { font-size: 14px; border-bottom: 1px solid #10598A; padding-bottom: 4px; }
    .print-target .result-right {
        width: 100%;
        padding: 12px 0 0;
        box-shadow: none;
        border: none;
        border-top: 1px solid #ccc;
        margin-top: 16px;
        background: none;
    }

    /* 回答テキスト調整 */
    .print-target .answer { font-size: 11px; line-height: 1.6; }
    .print-target .answer h1 { font-size: 12px; padding: 5px 10px; margin: 8px 0 6px; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
    .print-target .answer h2 { font-size: 11.5px; margin: 6px 0 4px; }
    .print-target .answer h3 { font-size: 11px; margin: 5px 0 3px; }
    .print-target .answer table { font-size: 10px; }
    .print-target .answer th, .print-target .answer td { padding: 3px 6px; }
    .print-target .answer pre { font-size: 9px; padding: 6px 10px; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
    .print-target .answer code { font-size: 10px; }
    .print-target .answer blockquote { -webkit-print-color-adjust: exact; print-color-adjust: exact; }

    /* 参考ソース */
    .print-target .sources h4 { font-size: 11px; }
    .print-target .source-item { font-size: 10px; padding: 6px 8px; margin-bottom: 4px; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
    .print-target .source-item .preview { font-size: 9px; }

    /* ステップリスト */
    .print-target .answer ol.step-list { gap: 4px; }
    .print-target .answer ol.step-list .step-item { padding: 5px 8px; font-size: 10px; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
    .print-target .answer ol.step-list .step-badge { min-width: 18px; height: 18px; font-size: 9px; -webkit-print-color-adjust: exact; print-color-adjust: exact; }

    /* mermaid図 */
    .print-target .mermaid-chart { break-inside: avoid; }
    .print-target .mermaid-chart svg { max-width: 100%; height: auto; }

    /* フッター */
    .print-target::after {
        content: 'k-Report AIマニュアル検索';
        display: block;
        margin-top: 20px;
        padding-top: 8px;
        border-top: 1px solid #ccc;
        font-size: 9px;
        color: #94a3b8;
        text-align: right;
    }

    /* ページ分割制御 */
    .print-target .source-item { break-inside: avoid; }
    .print-target .answer table { break-inside: avoid; }
}

/* ===== Responsive (optional future) ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}