/* ===================================
   リセット・ベース
   =================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-accent: #00d3f8;
    --color-text: #333;
    --color-text-sub: #8a8a8a;
    --color-bg-gray: #f7f7f7;
    --color-white: #fff;
    --font-ja: 'Noto Sans JP', sans-serif;
    --font-en: 'senobi-gothic', sans-serif;
    --max-width: 1200px;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-ja);
    color: var(--color-text);
    background: var(--color-white);
    line-height: 1.8;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

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

.sp-only {
    display: none;
}

/* ===================================
   ヘッダー
   =================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 200;
}

.header-inner {
    width: 100%;
    padding: 0 80px;
}

.header-nav ul {
    display: flex;
    justify-content: flex-end;
    gap: 40px;
    padding: 32px 0;
}

.header-nav a {
    font-family: var(--font-en);
    font-size: 16px;
    color: var(--color-text);
    transition: color 0.3s;
}

.header-nav a:hover {
    color: var(--color-accent);
}

/* サブページヘッダー */
.site-header--sub {
    background: var(--color-white);
}

.site-header--sub .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

.header-logo a {
    display: flex;
    align-items: baseline;
    gap: 12px;
}

.header-logo-title {
    font-family: var(--font-en);
    font-size: 18px;
    color: var(--color-text);
}

.header-logo-subtitle {
    font-family: var(--font-en);
    font-size: 12px;
    color: var(--color-accent);
    letter-spacing: 2.4px;
}

.site-header--sub .header-nav ul {
    padding: 0;
}

.site-header--sub .header-nav a {
    font-size: 14px;
}

/* ===================================
   ヒーロー
   =================================== */
.hero {
    position: relative;
    width: 100%;
    height: 652px;
    overflow: hidden;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    z-index: 10;
}

.hero-title {
    font-size: 0;
    line-height: 1;
}

.hero-logo {
    width: 305px;
    height: auto;
}

.hero-catchcopy {
    font-size: 16px;
    color: var(--color-text);
    letter-spacing: 2.56px;
    margin-top: 48px;
}

/* ===================================
   セクション共通
   =================================== */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-title {
    font-family: var(--font-ja);
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
}

.section-subtitle {
    font-family: var(--font-en);
    font-size: 16px;
    color: var(--color-accent);
    margin-top: 8px;
}

/* ===================================
   最新コンテンツ
   =================================== */
.latest-articles {
    padding: 80px 120px;
    max-width: 1440px;
    margin: 0 auto;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px 24px;
}

.article-card a {
    display: block;
}

.article-thumbnail {
    width: 100%;
    aspect-ratio: 286 / 150;
    overflow: hidden;
    background: #d9d9d9;
}

.article-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.article-card a:hover .article-thumbnail img {
    transform: scale(1.05);
}

.no-thumbnail {
    width: 100%;
    height: 100%;
    background: #d9d9d9;
}

.article-meta {
    padding-top: 8px;
}

.article-category {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 10px;
    color: var(--color-text);
}

.category-dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--color-accent);
}

.article-title {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-text);
    margin-top: 4px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
}

.article-date {
    display: block;
    font-size: 12px;
    color: var(--color-text-sub);
    margin-top: 4px;
}

.section-more {
    text-align: center;
    margin-top: 48px;
}

.more-link {
    display: inline-block;
    font-size: 14px;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    padding: 12px 40px;
    border-radius: 100px;
    transition: background 0.3s, color 0.3s;
}

.more-link:hover {
    background: var(--color-accent);
    color: var(--color-white);
}

/* ===================================
   お問い合わせ
   =================================== */
.contact-section {
    background: var(--color-bg-gray);
    padding: 84px 0;
    text-align: center;
}

.contact-description {
    font-size: 14px;
    color: var(--color-text);
    margin-top: 32px;
}

.contact-button {
    display: inline-block;
    background: var(--color-accent);
    color: var(--color-white);
    font-size: 20px;
    font-weight: 700;
    padding: 14px 80px;
    border-radius: 100px;
    margin-top: 16px;
    transition: opacity 0.3s;
}

.contact-button:hover {
    opacity: 0.8;
}

/* ===================================
   フッター
   =================================== */
.site-footer {
    padding: 60px 0 40px;
    text-align: center;
}

.footer-logo-img {
    width: 200px;
    height: auto;
    margin: 0 auto;
    display: block;
}

.footer-nav {
    margin-top: 40px;
}

.footer-nav ul {
    display: flex;
    justify-content: center;
    gap: 24px;
}

.footer-nav a {
    font-size: 12px;
    color: var(--color-text);
    transition: color 0.3s;
}

.footer-nav a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    margin-top: 40px;
}

.footer-bottom a {
    font-size: 12px;
    color: var(--color-text-sub);
}

.copyright {
    font-size: 12px;
    color: var(--color-text-sub);
    margin-top: 16px;
}

/* ===================================
   ハンバーガーメニュー
   =================================== */
.hamburger {
    display: none;
    position: relative;
    width: 30px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 200;
    padding: 0;
}

.hamburger span {
    display: block;
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-accent);
    transition: transform 0.3s, opacity 0.3s;
}

.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 8px; }
.hamburger span:nth-child(3) { top: 16px; }

.hamburger.is-active span:nth-child(1) {
    top: 8px;
    transform: rotate(45deg);
}

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

.hamburger.is-active span:nth-child(3) {
    top: 8px;
    transform: rotate(-45deg);
}

.mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.95);
    z-index: 199;
    justify-content: center;
    align-items: center;
}

.mobile-overlay.is-active {
    display: flex;
}

.mobile-overlay ul {
    text-align: center;
}

.mobile-overlay li {
    margin-bottom: 32px;
}

.mobile-overlay a {
    font-size: 18px;
    color: var(--color-text);
}

/* ===================================
   コンテンツ一覧
   =================================== */
.contents-archive {
    padding: 160px 120px 80px;
    max-width: 1440px;
    margin: 0 auto;
}

.contents-archive .articles-grid {
    grid-template-columns: repeat(4, 1fr);
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 60px;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 8px;
    font-size: 14px;
    color: var(--color-text);
    border: 1px solid #ddd;
    border-radius: 4px;
    transition: background 0.3s, color 0.3s, border-color 0.3s;
}

.pagination a:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.pagination .current {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

.pagination .dots {
    border: none;
}

/* ===================================
   お問い合わせページ
   =================================== */
.contact-page {
    padding: 120px 80px 80px;
    max-width: 800px;
    margin: 0 auto;
}

.contact-page-description {
    text-align: center;
    font-size: 14px;
    color: var(--color-text);
    margin-bottom: 48px;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
}

.required {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    color: var(--color-white);
    background: var(--color-accent);
    padding: 2px 8px;
    border-radius: 2px;
    margin-left: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    font-family: var(--font-ja);
    color: var(--color-text);
    border: 1px solid #ddd;
    border-radius: 4px;
    background: var(--color-white);
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form-group textarea {
    resize: vertical;
}

.form-submit {
    text-align: center;
}

.form-submit .contact-button {
    border: none;
    cursor: pointer;
    font-family: var(--font-ja);
}

.contact-errors {
    max-width: 600px;
    margin: 0 auto 24px;
    padding: 16px;
    background: #fef2f2;
    border: 1px solid #fca5a5;
    border-radius: 4px;
    color: #dc2626;
    font-size: 14px;
}

.contact-success {
    text-align: center;
    font-size: 16px;
    color: var(--color-text);
    line-height: 2;
}

.contact-success .contact-button {
    margin-top: 32px;
}

/* ===================================
   Coming soon
   =================================== */
.coming-soon-page {
    padding: 160px 80px 120px;
    text-align: center;
}

.coming-soon-text {
    font-family: var(--font-en);
    font-size: 20px;
    color: var(--color-text-sub);
    letter-spacing: 2px;
}

/* ===================================
   パンくずリスト
   =================================== */
.breadcrumb {
    padding: 80px 80px 0;
    max-width: 1440px;
    margin: 0 auto;
}

.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0;
    font-size: 12px;
    color: var(--color-text-sub);
    list-style: none;
}

.breadcrumb li::after {
    content: '>';
    margin: 0 8px;
    color: var(--color-text-sub);
}

.breadcrumb li:last-child::after {
    display: none;
}

.breadcrumb a {
    color: var(--color-text-sub);
    transition: color 0.3s;
}

.breadcrumb a:hover {
    color: var(--color-accent);
}

/* ===================================
   記事ページ
   =================================== */
.single-container {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 60px;
    padding: 40px 80px 80px;
    max-width: 1440px;
    margin: 0 auto;
}

.single-main {
    min-width: 0;
}

.single-header {
    margin-bottom: 32px;
}

.single-categories {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.single-category {
    display: inline-block;
    font-size: 12px;
    color: var(--color-white);
    background: var(--color-accent);
    padding: 4px 12px;
    border-radius: 2px;
    transition: opacity 0.3s;
}

.single-category:hover {
    opacity: 0.8;
}

.single-title {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.5;
    color: var(--color-text);
}

.single-date {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--color-text-sub);
    margin-top: 16px;
}

.single-date-modified::before {
    content: '｜';
    margin-right: 12px;
}

.single-thumbnail {
    margin-bottom: 40px;
}

.single-thumbnail img {
    width: 100%;
    height: auto;
    border-radius: 4px;
}

.single-content {
    font-size: 16px;
    line-height: 2;
    color: var(--color-text);
}

.single-content h2 {
    font-size: 24px;
    font-weight: 700;
    margin: 48px 0 24px;
    padding: 12px 16px;
    border-left: 4px solid var(--color-accent);
    background: var(--color-bg-gray);
}

.single-content h3 {
    font-size: 20px;
    font-weight: 700;
    margin: 40px 0 20px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-accent);
}

.single-content h4 {
    font-size: 18px;
    font-weight: 700;
    margin: 32px 0 16px;
}

.single-content p {
    margin-bottom: 24px;
}

.single-content ul,
.single-content ol {
    margin: 0 0 24px 24px;
    list-style: revert;
}

.single-content li {
    margin-bottom: 8px;
}

.single-content blockquote {
    margin: 24px 0;
    padding: 24px;
    background: var(--color-bg-gray);
    border-left: 4px solid var(--color-accent);
    font-style: italic;
}

.single-content img {
    max-width: 100%;
    height: auto;
    margin: 24px 0;
    border-radius: 4px;
}

.single-content a {
    color: var(--color-accent);
    text-decoration: underline;
}

.single-content a:hover {
    text-decoration: none;
}

.single-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
}

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

.single-content th {
    background: var(--color-bg-gray);
    font-weight: 700;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* 関連記事 */
.related-articles {
    margin-top: 80px;
    padding-top: 60px;
    border-top: 1px solid #eee;
}

.related-articles .articles-grid {
    grid-template-columns: repeat(3, 1fr);
}

/* ===================================
   サイドバー
   =================================== */
.sidebar {
    position: sticky;
    top: 80px;
    align-self: start;
}

.sidebar-widget {
    margin-bottom: 40px;
}

.sidebar-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-accent);
    margin-bottom: 16px;
}

.sidebar-category-list li {
    border-bottom: 1px solid #eee;
}

.sidebar-category-list a {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    font-size: 14px;
    color: var(--color-text);
    transition: color 0.3s;
}

.sidebar-category-list a:hover {
    color: var(--color-accent);
}

.category-count {
    color: var(--color-text-sub);
    font-size: 12px;
}

.sidebar-popular-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.sidebar-popular-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    transition: opacity 0.3s;
}

.sidebar-popular-item a:hover {
    opacity: 0.7;
}

.popular-rank {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    font-size: 12px;
    font-weight: 700;
    color: var(--color-white);
    background: var(--color-accent);
    border-radius: 50%;
}

.popular-thumbnail {
    flex-shrink: 0;
    width: 64px;
    height: 48px;
    overflow: hidden;
    border-radius: 2px;
    background: #d9d9d9;
}

.popular-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.popular-title {
    font-size: 13px;
    line-height: 1.5;
    color: var(--color-text);
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
}

/* ===================================
   レスポンシブ：スマホ（599px以下）
   =================================== */
@media (max-width: 599px) {
    .sp-only {
        display: inline;
    }

    .header-inner {
        padding: 0 20px;
    }

    .header-nav {
        display: none;
    }

    .site-header--sub .header-inner {
        display: flex;
        align-items: center;
        height: 56px;
    }

    .header-logo a {
        flex-direction: column;
        gap: 2px;
        line-height: 1.2;
    }

    .header-logo-title {
        font-size: 4.2vw;
    }

    .header-logo-subtitle {
            font-size: 2.2vw;
    letter-spacing: 0.2vw;
    }

    .hamburger {
        display: block;
        position: absolute;
        top: 28px;
        right: 20px;
    }

    .site-header--sub .hamburger {
        top: 50%;
        transform: translateY(-50%);
    }

    .hero {
        height: 480px;
    }

    .hero-logo {
        width: 200px;
    }

    .footer-logo-img {
        width: 160px;
    }

    .hero-catchcopy {
        font-size: 13px;
        letter-spacing: 1.5px;
        margin-top: 24px;
    }

    .latest-articles {
        padding: 48px 20px;
    }

    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px 16px;
    }

    .article-title {
        font-size: 12px;
    }

    .article-date {
        font-size: 10px;
    }

    .section-header {
        margin-bottom: 32px;
    }

    .section-title {
        font-size: 20px;
    }

    .section-subtitle {
        font-size: 13px;
    }

    .contact-section {
        padding: 48px 20px;
    }

    .contact-description {
        font-size: 13px;
    }

    .contact-button {
        font-size: 16px;
        padding: 14px 48px;
    }

    .footer-title {
        font-size: 20px;
    }

    .footer-nav ul {
        flex-direction: column;
        gap: 16px;
    }

    .contents-archive {
        padding: 80px 20px 48px;
    }

    .contents-archive .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .breadcrumb {
        padding: 72px 20px 0;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .breadcrumb ol {
        flex-wrap: nowrap;
        white-space: nowrap;
    }

    .single-container {
        grid-template-columns: 1fr;
        gap: 48px;
        padding: 24px 20px 48px;
    }

    .single-title {
        font-size: 22px;
    }

    .single-content h2 {
        font-size: 20px;
    }

    .single-content h3 {
        font-size: 18px;
    }

    .related-articles .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .sidebar {
        position: static;
    }

    .contact-page {
        padding: 80px 20px 48px;
    }
}