/* 問題ページ専用スタイル */

/* セクション共通 */
section {
    background-color: white;
    border-radius: 10px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

section h2 {
    color: #333;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    display: inline-block;
    position: relative;
    padding-bottom: 0.5rem;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

/* 問題セクション */
.question h2::after {
    background: linear-gradient(90deg, #FF6B6B 0%, #FF8E8E 100%);
}

/* ヒントセクション */
.hint h2::after {
    background: linear-gradient(90deg, #FFA726 0%, #FFB74D 100%);
}

.hint details {
    background-color: #fff8e1;
    border: 2px solid #ffd54f;
    border-radius: 8px;
    padding: 1rem;
}

.hint summary {
    cursor: pointer;
    font-weight: 600;
    color: #f57c00;
    user-select: none;
    padding: 0.5rem;
    transition: color 0.3s;
}

.hint summary:hover {
    color: #e65100;
}

.hint-content {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #ffd54f;
}

/* 解答セクション */
.answer h2::after {
    background: linear-gradient(90deg, #4CAF50 0%, #6BC56F 100%);
}

.answer details {
    background-color: #e8f5e9;
    border: 2px solid #66bb6a;
    border-radius: 8px;
    padding: 1rem;
}

.answer summary {
    cursor: pointer;
    font-weight: 600;
    color: #2e7d32;
    user-select: none;
    padding: 0.5rem;
    transition: color 0.3s;
}

.answer summary:hover {
    color: #1b5e20;
}

.answer-content {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #66bb6a;
}

/* コードコンテナ */
.code-container {
    margin: 1rem 0;
}

.code-container h3,
.code-container h4 {
    color: #555;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.code-container pre {
    background-color: #f4f4f4;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 1rem;
    overflow-x: auto;
    font-size: 0.95rem;
    line-height: 1.6;
}

.code-container code {
    font-family: 'Consolas', 'Monaco', 'Andale Mono', 'Ubuntu Mono', monospace;
    color: #333;
}

/* コード内のハイライト */
.highlight {
    background-color: #ffeb3b;
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
    font-weight: 600;
}

/* デモエリア - 実行結果表示用 */
.demo {
    margin: 1.5rem 0;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border: 2px dashed #dee2e6;
    border-radius: 8px;
    min-height: 300px;  /* 最低高さを確保 */
    box-sizing: border-box;
}

/* 実行結果の内部コンテナ */
.demo > div:first-of-type {
    min-height: 200px;  /* 実行結果エリアの最低高さ */
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: row;  /* デフォルトは横並び */
    box-sizing: border-box;
}

/* 縦並びレイアウトが必要な場合 */
.demo > div.column-layout {
    flex-direction: column;
}

.demo h3,
.demo h4,
.demo h5 {
    color: #495057;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    width: 100%;  /* 見出しは幅いっぱいに */
}

.demo-note {
    margin-top: 1rem;
    padding: 0.5rem;
    background-color: #fff3cd;
    border-left: 4px solid #ffc107;
    color: #856404;
    font-size: 0.9rem;
}

/* 技術説明ボックス */
.technical-explanation {
    margin: 1.5rem 0;
    padding: 1.5rem;
    background-color: #e3f2fd;
    border-left: 4px solid #2196f3;
    border-radius: 5px;
}

.technical-explanation h4 {
    color: #1565c0;
    margin-bottom: 1rem;
}

.technical-explanation ul,
.technical-explanation ol {
    margin-left: 1.5rem;
    line-height: 1.8;
}

.technical-explanation li {
    margin-bottom: 0.5rem;
}

/* ソリューションメソッド */
.solution-method {
    margin: 2rem 0;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: 8px;
    border: 1px solid #dee2e6;
}

.solution-method h4 {
    color: #28a745;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

/* キーポイント */
.key-point {
    margin-top: 2rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
    border: 2px solid #667eea;
    border-radius: 10px;
}

.key-point h4 {
    color: #667eea;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.key-point ul {
    margin-left: 1.5rem;
    line-height: 1.8;
}

.key-point p {
    line-height: 1.8;
    color: #495057;
}

/* テーブル */
table {
    width: 100%;
    margin: 1rem 0;
    border-collapse: collapse;
    background-color: white;
}

table thead {
    background-color: #f8f9fa;
}

table th,
table td {
    padding: 0.75rem;
    text-align: left;
    border: 1px solid #dee2e6;
}

table th {
    font-weight: 600;
    color: #495057;
}

table tbody tr:hover {
    background-color: #f8f9fa;
}

/* プロパティテーブル */
.property-table table,
.axis-table {
    font-size: 0.95rem;
}

.property-table code,
.axis-table code {
    background-color: #f4f4f4;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9rem;
}

/* 値の例 */
.value-examples {
    margin: 1.5rem 0;
}

/* 軸のデモ */
.axis-demo {
    margin: 1.5rem 0;
}

.axis-demo h4 {
    color: #495057;
    margin-bottom: 0.5rem;
}

/* パターン */
.patterns {
    margin-top: 2rem;
}

/* ナビゲーション */
.problem-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
}

.nav-link {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    font-weight: 600;
}

.nav-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.nav-link.prev {
    background: linear-gradient(135deg, #6c757d 0%, #868e96 100%);
}

.nav-link.prev:hover {
    box-shadow: 0 4px 12px rgba(108, 117, 125, 0.4);
}

/* レスポンシブ */
@media (max-width: 768px) {
    section {
        padding: 1.5rem;
    }

    .code-container pre {
        font-size: 0.85rem;
        padding: 0.75rem;
    }

    .problem-nav {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-link {
        width: 100%;
        text-align: center;
    }

    table {
        font-size: 0.85rem;
    }

    table th,
    table td {
        padding: 0.5rem;
    }
}