@charset "UTF-8";

/* ========================================================
   周期表一覧ページ (Gridレイアウト)
======================================================== */
.periodic-table-wrapper {
    width: 100%;
    overflow-x: auto;
    /* 端の要素がホバー拡大時に切れないようにするための余白 */
    padding: 15px; 
    padding-bottom: 20px;
    box-sizing: border-box;
}

.page-description {
    margin-bottom: 20px;
    font-size: 0.95rem;
    color: #555;
}

/* 18列 × 7行〜 のグリッドシステム */
.periodic-table-grid {
    display: grid;
    grid-template-columns: repeat(18, minmax(45px, 1fr));
    grid-template-rows: repeat(7, auto) 20px auto auto;
    gap: 4px;
    min-width: 800px;
}

/* --- 配置用クラス --- */
.col-1 { grid-column: 1; }
.col-2 { grid-column: 2; }
.col-3 { grid-column: 3; }
.col-4 { grid-column: 4; }
.col-5 { grid-column: 5; }
.col-6 { grid-column: 6; }
.col-7 { grid-column: 7; }
.col-8 { grid-column: 8; }
.col-9 { grid-column: 9; }
.col-10 { grid-column: 10; }
.col-11 { grid-column: 11; }
.col-12 { grid-column: 12; }
.col-13 { grid-column: 13; }
.col-14 { grid-column: 14; }
.col-15 { grid-column: 15; }
.col-16 { grid-column: 16; }
.col-17 { grid-column: 17; }
.col-18 { grid-column: 18; }
.row-1 { grid-row: 1; }
.row-2 { grid-row: 2; }
.row-3 { grid-row: 3; }
.row-4 { grid-row: 4; }
.row-5 { grid-row: 5; }
.row-6 { grid-row: 6; }
.row-7 { grid-row: 7; }
.row-8 { grid-row: 8; margin-top: 15px; } 
.row-9 { grid-row: 9; }
.row-10 { grid-row: 10; }

/* 元素の各セル */
.element-cell {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 4px;
    text-decoration: none;
    color: #333;
    transition: transform 0.2s, box-shadow 0.2s;
    background-color: #fff;
    position: relative; /* バッジの絶対配置の基準 */
}

.element-cell:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    z-index: 2;
}

.element-cell .atomic-number {
    font-size: 0.7rem;
    align-self: flex-start;
    color: #666;
}

.element-cell .symbol {
    font-size: 1.2rem;
    font-weight: bold;
    margin: 2px 0;
}

.element-cell .name {
    font-size: 0.7rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

/* カテゴリ別カラーリング */
.category-alkali_metal { background-color: #ffcc99; }
.category-alkaline_earth { background-color: #ffff99; }
.category-transition_metal { background-color: #ffb3b3; }
.category-post_transition { background-color: #cccccc; }
.category-metalloid { background-color: #ccccff; }
.category-nonmetal { background-color: #99ff99; }
.category-halogen { background-color: #99ffff; }
.category-noble_gas { background-color: #ff99cc; }
.category-lanthanide { background-color: #ff99ff; }
.category-actinide { background-color: #e6b3ff; }
.category-unknown { background-color: #e0e0e0; }

/* ========================================================
   元素詳細ページ
======================================================== */
.element-detail-card {
    border: 2px solid #ddd;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 30px;
    background-color: #fafafa;
}

.element-detail-header {
    text-align: center;
    margin-bottom: 20px;
}

.element-detail-header .atomic-number {
    font-size: 1.2rem;
    color: #555;
}

.element-detail-header .element-symbol {
    font-size: 4rem;
    margin: 0;
    line-height: 1;
    color: #222;
}

.element-detail-header .element-name-ja {
    font-size: 1.5rem;
    font-weight: bold;
    margin-top: 5px;
}

.element-detail-header .element-name-en {
    font-size: 1rem;
    color: #777;
}

.element-info-table {
    width: 100%;
    border-collapse: collapse;
}

.element-info-table th, 
.element-info-table td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: left;
}

.element-info-table th {
    background-color: #f0f0f0;
    width: 30%;
}

.element-section {
    margin-bottom: 30px;
}

.element-section h2 {
    font-size: 1.3rem;
    border-bottom: 2px solid #007bff;
    padding-bottom: 5px;
    margin-bottom: 15px;
}

.element-description,
.episode-text {
    line-height: 1.6;
    color: #444;
}

.mnemonic-box {
    background-color: #fff3cd;
    border-left: 4px solid #ffeeba;
    padding: 15px;
    border-radius: 4px;
    font-weight: bold;
    color: #856404;
}

.episode-box {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 15px;
}

.episode-title {
    font-weight: bold;
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.btn-quiz-search {
    display: inline-block;
    padding: 15px 30px;
    background-color: #4CAF50;
    color: white;
    font-size: 1.1rem;
    font-weight: bold;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.2s;
}

.btn-quiz-search:hover {
    background-color: #43a047;
}

/* ========================================================
   絞り込み機能 (Filter UI)
======================================================== */
.category-filter-area {
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.filter-label {
    font-weight: bold;
    margin-right: 10px;
    font-size: 0.9rem;
}

.btn-filter {
    padding: 6px 12px;
    border: 1px solid #ccc;
    background-color: #fff;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.btn-filter:hover {
    background-color: #f0f0f0;
}

.btn-filter.is-active {
    background-color: #007bff;
    color: #fff;
    border-color: #007bff;
}

.element-cell.is-dimmed {
    opacity: 0.15;
    pointer-events: none;
    filter: grayscale(100%);
}

.placeholder-cell {
    background-color: #f5f5f5 !important;
    border: 1px dashed #ccc !important;
    color: #999;
    pointer-events: none;
}
.placeholder-cell:hover {
    transform: none !important;
    box-shadow: none !important;
    z-index: 1 !important;
}
.placeholder-cell .symbol {
    font-size: 0.85rem;
    color: #777;
    margin-top: 5px;
}

/* ========================================================
   学習・検定機能スタイル
======================================================== */

/* 一覧ページ：進捗エリア */
.learning-progress-area {
    background-color: #f8f9fa;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 20px;
}

.progress-label {
    font-weight: bold;
    font-size: 0.95rem;
}

.progress-label .progress-count {
    font-size: 1.2rem;
    color: #333;
}

.progress-bar-wrap {
    width: 100%;
    height: 12px;
    background-color: #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar-inner {
    height: 100%;
    background: linear-gradient(90deg, #4caf50, #81c784);
    border-radius: 10px;
    transition: width 1s ease-in-out;
}

/* 一覧ページ：バッジマーク */
.is-learned-cell {
    border: 2px solid #9e9e9e !important;
}

.learned-mark {
    position: absolute;
    top: -6px;
    left: -6px; /* 💮と被らないよう左上に変更 */
    font-size: 0.9rem;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    z-index: 2;
}

.passed-mark {
    position: absolute;
    top: -8px;
    right: -8px; /* 右上に配置 */
    font-size: 1.2rem;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    z-index: 3;
    animation: bounce 2s infinite;
}

/* 詳細ページ：アクションエリア */
.element-action-area {
    text-align: center;
    margin-bottom: 30px;
    background: #fdfdfd;
    padding: 20px;
    border: 1px solid #eee;
    border-radius: 8px;
}

.action-block {
    margin: 15px 0;
}

.action-divider {
    margin: 20px 0;
    border: 0;
    border-top: 1px dashed #ccc;
}

.btn-element-action {
    display: inline-block;
    padding: 12px 30px;
    font-size: 1.1rem;
    font-weight: bold;
    font-family: 'Meiryo', sans-serif;
    border-radius: 30px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
    max-width: 400px;
}

.btn-guest { background-color: #9e9e9e; color: #fff; }
.btn-guest:hover { background-color: #757575; }

/* 学習（既読）ボタン */
.btn-learn { background-color: #f5f5f5; color: #333; border: 2px solid #ccc; }
.btn-learn:hover { background-color: #e0e0e0; transform: translateY(-2px); }
.btn-learned { background-color: #e0e0e0; color: #777; border: 2px solid #ccc; cursor: default; }

/* 検定挑戦ボタン */
.btn-exam-challenge {
    background-color: #ff9800;
    color: #fff;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
.btn-exam-challenge:hover {
    background-color: #e68a00;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

/* 検定合格バッジ */
.exam-passed-badge {
    display: inline-block;
    width: 100%;
    max-width: 400px;
    background: #fff3cd;
    color: #856404;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: bold;
    font-size: 1.1rem;
    border: 2px solid #ffeeba;
    box-sizing: border-box;
}

.coming-soon-text {
    font-size: 0.85rem;
    color: #888;
}


/* ========================================================
   スマートフォン向けレスポンシブ調整 (max-width: 768px)
======================================================== */
.scroll-hint-sp {
    display: none;
    text-align: right;
    font-size: 0.85rem;
    color: #007bff;
    font-weight: bold;
    margin-bottom: 10px;
    animation: bounceRight 2s infinite;
}

@keyframes bounceRight {
    0%, 20%, 50%, 80%, 100% { transform: translateX(0); }
    40% { transform: translateX(5px); }
    60% { transform: translateX(3px); }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-3px); }
    60% { transform: translateY(-1px); }
}

@media screen and (max-width: 768px) {
    .scroll-hint-sp { display: block; }
    .periodic-table-wrapper {
        padding-bottom: 10px;
        box-shadow: inset -15px 0 10px -15px rgba(0, 0, 0, 0.3);
    }
    .filter-label { width: 100%; margin-bottom: 5px; }
    .btn-filter { padding: 6px 10px; font-size: 0.75rem; }
    .element-cell { padding: 3px; }
    .element-cell .symbol { font-size: 1.1rem; }
    .element-cell .name { font-size: 0.6rem; }
    .element-detail-card { padding: 15px; }
    .element-detail-header .element-symbol { font-size: 3rem; }
    .element-info-table th { width: 40%; }
    .te-quiz-links .btn-quiz-search {
        display: block; width: 100%; box-sizing: border-box; padding: 15px 10px; text-align: center;
    }
}