/* CSS変数定義 */
:root {
    --primary-color: #609;
    --secondary-color: #00f;
    --accent-color: #ffc;
    --text-color: #333;
    --bg-color: #fff;
    --focus-color: #0066cc;
    --header-gradient: linear-gradient(to bottom, #fff 0%, #999 100%);
    --container-width: 980px;
    --content-width: 71%;
    --sidebar-width: 27%;
    --transition-speed: 0.3s;
}

/* ダークモード対応 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1a;
        --text-color: #e0e0e0;
    }
}

/* リセットCSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ベーススタイル */
html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Noto Sans", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI", Meiryo, sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-color);
    background-image: url(https://shikakuseek.com/sozai/kabe_check27.gif);
    background-attachment: fixed;
    text-align: center;
}

/* リンクスタイル - アクセシビリティ改善 */
a {
    color: inherit;
    text-decoration: underline;
    transition: all var(--transition-speed) ease;
}

a:hover,
a:active {
    text-decoration: none;
}

a:focus {
    outline: 2px solid var(--focus-color);
    outline-offset: 2px;
    text-decoration: none;
}

a img {
    border: none;
    max-width: 100%;
    height: auto;
}

/* メインコンテナ */
.container {
    width: var(--container-width);
    min-width: 320px;
    background: var(--bg-color);
    margin: 0 auto;
    padding: 0 15px;
    text-align: left;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
    position: relative;
}

/* ヘッダー */
.header {
    background: var(--bg-color);
    overflow: hidden;
}

.header h1 {
    padding: 3px 15px;
    margin: 0 0 10px;
    text-align: center;
    color: var(--primary-color);
    line-height: 1.2;
    font-size: 0.8rem;
    text-shadow: 1px 2px 1px #999;
    background: var(--header-gradient);
    border-radius: 4px;
}

.header-content {
    display: flex;
    gap: 2%;
    align-items: flex-start;
    flex-wrap: wrap;
}

.headerlogo {
    flex: 0 0 30%;
    min-width: 225px;
    padding: 5px 0 0;
    background-color: var(--bg-color);
}

.headerlogo img {
    display: block;
    max-width: 100%;
    height: auto;
}

.header-right {
    flex: 1;
    min-width: 300px;
}

/* 検索フォーム */
#cse-search-box {
    margin-bottom: 10px;
}

#cse-search-box div {
    display: flex;
    gap: 4px;
}

#cse-search-box input[type="text"] {
    flex: 1;
    padding: 4px;
    border: 1px solid #ccc;
    border-radius: 4px 0 0 4px;
    font-size: 14px;
}

#cse-search-box input[type="submit"] {
    padding: 4px 12px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    transition: background var(--transition-speed);
    font-size: 14px;
}

#cse-search-box input[type="submit"]:hover {
    background: #45a049;
}

.header h2 {
    font-size: 0.7rem;
    line-height: 1.4;
    border: 1px dashed var(--secondary-color);
    background-color: var(--accent-color);
    margin: 5px 0;
    padding: 4px;
    border-radius: 4px;
}

/* パンくずリスト */
.breadcrumb {
    margin: 10px 0;
    padding: 0 15px;
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 14px;
}

.breadcrumb li::after {
    content: " > ";
    margin-left: 8px;
    color: #666;
}

.breadcrumb li:last-child::after {
    content: "";
}

.breadcrumb a {
    color: #0066cc;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.contentup {
    padding: 0 0 15px;  
    border-top: 3px solid #666;
    background-color: var(--bg-color);
    text-align: center;
    clear: both;
}

.contentdown {
    width: 100%;
    background-color: var(--bg-color);
    text-align: center;
    clear: both;
    padding-bottom: 10px;
}

/* メインレイアウト */
.main-layout {
    display: flex;
    gap: 2%;
    margin: 0 auto;
}

/* コンテンツエリア */
.content {
    width: var(--content-width);
    background-color: var(--bg-color);
}

.content > p {
    padding: 0 15px;
    margin-bottom: 10px;
    color: #d00;
    font-weight: bold;
}

/* メインコンテンツの左右カラム */
.content-columns {
    display: flex;
    gap: 4%;
    margin-bottom: 20px;
}

.mainrightleft,
.mainrightright {
    width: 48%;
    background: var(--bg-color);
}

/* 見出しスタイル */
h3 {
    font-size: 16px;
    font-weight: 700;
    margin: 0 0 3px 3px;
    padding: 3px 0 2px 15px;
    border-bottom: 2px solid #414141;
    background: url(https://shikakuseek.com/sozai/yajirusi3.gif) no-repeat left center;
}

h4 {
    font-size: 18px;
    font-weight: 700;
    margin: 5px 0 20px;
    padding: 0 0 0 20px;
    border-bottom: 2px double #414141;
    background: url(https://shikakuseek.com/sozai/yajirusi.gif) no-repeat left center;
}

/* カテゴリ説明 */
.cate_m {
    font-size: 14px;
    font-weight: 400;
    margin: 0 0 15px 3px;
    padding: 3px 0 10px 12px;
    background: url(https://shikakuseek.com/sozai/aicon_112.gif) no-repeat left top;
}

/* 情報ボックス */
.info {
    margin: 5px 0 0;
    padding: 5px 5px 10px 17px;
    border: 1px solid var(--secondary-color);
    background: #6666ff url(https://shikakuseek.com/sozai/timg.gif) repeat;
    color: #fff;
    font-weight: 700;
    text-align: center;
}

.info-box {
    margin: 15px 0;
    padding: 15px;
    border: 1px solid #ddd;
    background-color: #f9f9f9;
    border-radius: 4px;
}

.info-box h4 {
    margin: 0 0 10px 0;
    padding: 0;
    background: none;
    border: none;
    color: #333;
    font-size: 16px;
}

.point-box {
    margin: 15px 0;
    padding: 15px;
    border: 1px solid #ffd700;
    background-color: #fffacd;
    border-radius: 4px;
}

.point-box h4 {
    margin: 0 0 10px 0;
    padding: 0;
    background: none;
    border: none;
    color: #333;
    font-size: 16px;
}

.summary-box {
    margin: 15px 0;
    padding: 15px;
    border: 2px solid #4299e1;
    background-color: #e6f3ff;
    border-radius: 4px;
}

.related-links {
    margin: 15px 0;
    padding: 15px;
    border: 1px solid #ccc;
    background-color: #f5f5f5;
    border-radius: 4px;
}

.related-links h3 {
    margin: 0 0 10px 0;
    padding: 0;
    background: none;
    border: none;
}

.related-links ul {
    list-style: disc;
    padding-left: 20px;
}

.info_box {
    margin: 0 0 10px;
    padding: 5px;
    border: 1px solid var(--secondary-color);
    border-top: none;
    background-color: var(--accent-color);
    text-align: center;
}

/* テーブルスタイル */
.table-wrapper {
    overflow-x: auto;
    margin: 15px 0;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
    font-size: 14px;
}

.data-table caption {
    font-weight: bold;
    margin-bottom: 10px;
    font-size: 16px;
}

.data-table th,
.data-table td {
    border: 1px solid #ddd;
    padding: 8px 12px;
    text-align: left;
}

.data-table th {
    background-color: #f5f5f5;
    font-weight: bold;
}

.data-table tr:nth-child(even) {
    background-color: #f9f9f9;
}

/* 試験データグリッド */
.exam-data-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    padding: 10px;
}

.data-item {
    background: #f9f9f9;
    padding: 10px;
    border-radius: 4px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.data-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.data-item.highlight {
    background: #fffacd;
    border: 2px solid #ffd700;
}

.data-item-label {
    font-size: 11px;
    color: #666;
    margin-bottom: 4px;
}

.data-item-value {
    font-size: 18px;
    font-weight: bold;
    color: #333;
    margin-bottom: 4px;
}

.data-item-value.large {
    font-size: 22px;
    color: #d00;
}

.data-item-change {
    font-size: 10px;
}

.data-item-change.positive {
    color: #0a0;
}

.data-item-change.negative {
    color: #d00;
}

.data-item-change.neutral {
    color: #666;
}

.data-source {
    margin-top: 10px;
    padding: 8px;
    border-top: 1px solid #ddd;
    font-size: 11px;
}

/* カテゴリコンテナ */
.catecontainer {
    padding: 3px 0 10px;
    margin: 5px 0;
    background-color: var(--bg-color);
    clear: both;
}

.catecontainer p {
    font-size: 0.8rem;
    padding: 0 15px;
    line-height: 1.6;
}

/* FAQ セクション */
.faq {
    margin: 20px 0;
    padding: 0 15px;
}

.faq-item {
    background-color: var(--accent-color);
    border: 1px dashed var(--secondary-color);
    border-radius: 4px;
    padding: 15px 20px;
    margin: 10px 0;
}

.faq-question {
    font-weight: bold;
    font-size: 15px;
    margin: 0 0 8px;
    padding-left: 20px;
    background: url(https://shikakuseek.com/sozai/aicon_112.gif) no-repeat left 2px;
    line-height: 1.6;
    color: #000;
}

.faq-answer {
    margin: 0;
    padding-left: 20px;
    background: url(https://shikakuseek.com/sozai/aicon_109.gif) no-repeat left 4px;
    line-height: 1.6;
    color: #333;
    font-size: 14px;
}

/* サイドバー */
.sidebar1 {
    width: var(--sidebar-width);
    padding-bottom: 10px;
}

.sidebar1 > p {
    padding: 5px 10px;
    margin-bottom: 10px;
    background: #f5f5f5;
    border-left: 3px solid var(--primary-color);
}

/* メニュー */
.menu1 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 10px 15px;
    font-weight: bold;
    font-size: 14px;
    border-radius: 4px 4px 0 0;
    margin: 0;
    box-sizing: border-box;
}

.menu_box {
    background: white;
    border: 1px solid #ddd;
    border-top: none;
    margin-bottom: 20px;
    border-radius: 0 0 4px 4px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    padding: 0;
    text-align: left;
    box-sizing: border-box;
}

.menu_box.shopping {
    text-align: center;
    padding: 10px;
}

/* ナビゲーションリスト */
.subs {
    list-style: none;
    background-color: var(--bg-color);
    padding: 0;
}

.subs ul {
    list-style: none;
    padding: 0;
    background: #f9f9f9;
}

.subs li {
    list-style: none;
    margin: 0;
}

.subs a {
    display: block;
    padding: 10px 15px;
    background-color: var(--bg-color);
    transition: all var(--transition-speed);
    text-decoration: none;
    color: var(--text-color);
    border-bottom: 1px solid #f0f0f0;
}

.subs > li > ul > li > a:hover {
    background: #f0f0f0;
    color: var(--primary-color);
    text-decoration: none;
    padding-left: 20px;
}

.subs ul a {
    padding: 10px 15px 10px 30px;
    font-size: 14px;
    border-bottom: 1px solid #f0f0f0;
}

.subs ul a:hover {
    background: #f0f0f0;
    color: var(--primary-color);
    padding-left: 35px;
}

.subs ul li ul a {
    padding: 10px 15px 10px 45px;
    font-size: 13px;
    color: #555;
}

.subs ul li ul a:hover {
    color: var(--primary-color);
    background: #f0f0f0;
    padding-left: 50px;
}

/* フッター */
.footer {
    padding: 10px 0;
    background: var(--bg-color);
    clear: both;
    margin: 0 -15px;
}

.footer-nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    padding: 10px 0;
    background: #e0e0e0;
    border-top: 1px solid #999;
}

.footer-nav li {
    font-size: 0.8rem;
}

.footer-nav a {
    color: #333;
    text-decoration: none;
}

.footer-nav a:hover {
    text-decoration: underline;
}

.footer-info {
    color: #303;
    margin: 0;
    padding: 5px 15px;
    line-height: 1.5;
    font-size: 0.6rem;
    text-align: center;
}

.footer-info p {
    margin: 5px 0;
    padding: 0;
}

.copyright {
    color: #999;
    font-size: 0.6rem;
    text-align: center;
    padding: 5px 15px;
}

/* ページトップボタン */
.pagetop {
    position: fixed;
    bottom: 60px;
    right: 40px;
    padding: 20px;
    background: #fff;
    border-radius: 10px;
    font-size: 18px;
    opacity: 0.4;
    border: 5px solid #666;
    color: #000;
    text-decoration: none;
    transition: all var(--transition-speed);
    z-index: 1000;
    display: none;
}

.pagetop:hover {
    opacity: 0.85;
    color: #fff;
    background: #7e7a7a;
}

.pagetop.show {
    display: block;
}

/* ハンバーガーメニュー */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 10px;
    background: none;
    border: none;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 3px 0;
    transition: 0.3s;
    display: block;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* レスポンシブデザイン - タブレット */
@media only screen and (max-width: 768px) {
    .hamburger {
        display: flex;
        position: fixed;
        top: 15px;
        right: 15px;
        z-index: 1001;
    }
    
    .sidebar1 {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        height: 100vh;
        background: white;
        transition: left 0.3s ease;
        overflow-y: auto;
        z-index: 1000;
        padding-top: 60px;
        box-shadow: 2px 0 5px rgba(0,0,0,0.1);
    }
    
    .sidebar1.active {
        left: 0;
    }

    .container {
        width: 90%;
        min-width: 320px;
    }

    .header-content {
        flex-direction: column;
    }

    .headerlogo {
        flex: none;
        width: 100%;
        text-align: center;
    }

    .header-right {
        flex: none;
        width: 100%;
    }

    .header h2 {
        margin: 10px 0;
    }

    .main-layout {
        flex-direction: column;
    }

    .content,
    .sidebar1 {
        width: 100%;
    }

    .pagetop {
        bottom: 30px;
        right: 8px;
        padding: 10px;
    }
}

/* レスポンシブデザイン - スマートフォン */
@media only screen and (max-width: 480px) {
    body {
        font-size: 16px;
    }

    .container {
        width: 100%;
        padding: 0;
        box-shadow: none;
    }

    .header h1 {
        font-size: 12px;
        padding: 8px;
        line-height: 1.3;
    }

    .header h2 {
        font-size: 13px;
        padding: 8px;
        margin: 5px;
    }

    .headerlogo img {
        max-width: 180px;
        height: auto;
    }

    #cse-search-box input[type="text"] {
        width: 100%;
        font-size: 16px;
        padding: 10px;
    }

    #cse-search-box input[type="submit"] {
        padding: 10px 20px;
        font-size: 16px;
    }

    .content-columns {
        flex-direction: column;
        gap: 0;
    }

    .mainrightleft,
    .mainrightright {
        width: 100%;
        margin-bottom: 20px;
    }

    .exam-data-grid {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 8px;
    }

    .data-item {
        padding: 12px;
    }

    .data-item-value {
        font-size: 16px;
    }

    .data-item-value.large {
        font-size: 20px;
    }

    .sidebar1 {
        width: 100%;
        padding: 0 8px;
    }

    .menu1, .menu_box {
        margin-left: 0;
        margin-right: 0;
        border-left: none;
        border-right: none;
        width: 100%;
    }

    .menu1 {
        font-size: 14px;
        padding: 12px;
        border-radius: 0;
    }

    .subs a {
        padding: 12px 15px;
        font-size: 14px;
        border-bottom: 1px solid #e0e0e0;
    }

    .subs ul a {
        padding: 12px 15px 12px 25px;
        font-size: 14px;
    }

    .subs ul li ul a {
        padding: 12px 15px 12px 35px;
        font-size: 13px;
    }

    .faq-item {
        padding: 12px;
        margin: 8px;
    }

    .faq-question {
        font-size: 14px;
        line-height: 1.5;
        margin: 12px 0 8px;
    }

    .faq-answer {
        font-size: 13px;
        line-height: 1.6;
        padding-left: 15px;
    }

    .footer-nav ul {
        flex-direction: column;
        gap: 0;
    }

    .footer-nav li {
        display: block;
        padding: 10px;
        border-bottom: 1px solid #ccc;
    }

    .footer-info {
        padding: 10px;
        font-size: 11px;
    }

    h1 { font-size: 18px; }
    h2 { font-size: 16px; }
    h3 { 
        font-size: 15px; 
        padding: 10px 0 10px 20px; 
    }
    h4 { 
        font-size: 16px; 
        padding: 10px 0 10px 25px; 
    }

    h3 a, h4 a {
        display: block;
        padding: 12px 0;
        margin: -12px 0;
    }

    .cate_m {
        padding: 10px 0 15px 15px;
        font-size: 14px;
    }

    .pagetop {
        bottom: 20px;
        right: 10px;
        padding: 12px;
        font-size: 16px;
        border-width: 2px;
        opacity: 0.7;
    }

    .contentup {
        padding: 8px;
        border-top: 1px solid #666;
    }

    .contentdown {
        display: none;
    }

    .info_box, .menu_box, .catecontainer {
        margin: 0 8px 15px;
    }

    p {
        padding: 0 10px;
    }
}

/* アクセシビリティ向上 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms;
        animation-iteration-count: 1;
        transition-duration: 0.01ms;
        scroll-behavior: auto;
    }
}

/* Print対応 */
@media print {
    .contentup,
    .contentdown,
    .pagetop,
    #cse-search-box,
    .hamburger,
    .sidebar-overlay {
        display: none;
    }

    body {
        background: none;
    }

    .container {
        width: 100%;
        box-shadow: none;
    }
}