/* ===== Japanese Class - Clean Rewrite ===== */
@import url('https://fonts.googleapis.com/css2?family=Zen+Kaku+Gothic+New:wght@400;500;700;900&family=Noto+Sans+JP:wght@400;500;700&family=Noto+Serif+JP:wght@400;700&family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary: #5B21B6;
    --primary-light: #7C3AED;
    --primary-pale: #EDE9FE;
    --text: #1E1B4B;
    --text-light: #6B7280;
    --border: #E5E7EB;
    --bg: #F5F3FF;
    --bg-alt: #FAF5FF;
    --white: #FFFFFF;
    --radius: 12px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Noto Sans JP', 'Zen Kaku Gothic New', sans-serif; color: var(--text); background: var(--bg); line-height: 1.8; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* --- Layout --- */
.container { max-width: 1060px; margin: 0 auto; padding: 0 24px; }
.main-wrap { min-height: 100vh; display: flex; flex-direction: column; }
.main-content { flex: 1; padding-top: 76px; }
.sidebar-layout { display: grid; grid-template-columns: 1fr 280px; gap: 32px; align-items: start; padding-top: 32px; padding-bottom: 80px; }
.content-area { min-width: 0; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

/* --- Header --- */
.site-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(245, 243, 255, 0.9); backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent; transition: all 0.3s;
}
.site-header.scrolled { border-bottom-color: var(--border); box-shadow: 0 2px 20px rgba(91,33,182,0.06); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.logo img { height: 40px; width: auto; }
.nav-list { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-link { display: inline-flex; align-items: center; gap: 4px; padding: 8px 16px; font-size: 0.95rem; font-weight: 500; color: var(--text); border-radius: 8px; transition: all 0.2s; }
.nav-link:hover, .nav-link.active { background: var(--primary-pale); color: var(--primary); }
.nav-dropdown { position: relative; }
.nav-dropdown-menu { display: none; position: absolute; top: 100%; left: 0; background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 8px; min-width: 220px; box-shadow: 0 12px 40px rgba(0,0,0,0.1); z-index: 100; }
.nav-dropdown:hover .nav-dropdown-menu { display: block; }
.nav-dropdown-item { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 8px; font-size: 0.9rem; transition: background 0.2s; }
.nav-dropdown-item:hover { background: var(--primary-pale); }
.nav-dropdown-item img { width: 28px; height: 28px; }
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.hamburger span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; }
.mobile-menu { display: none; position: fixed; top: 72px; left: 0; right: 0; background: var(--white); border-bottom: 1px solid var(--border); padding: 16px 24px; z-index: 999; }
.mobile-menu.open { display: block; }
.mobile-menu a { display: block; padding: 12px 0; font-size: 1rem; color: var(--text); border-bottom: 1px solid var(--border); }

/* --- Hero --- */
.hero {
    position: relative; padding: 64px 24px; overflow: hidden;
    background: linear-gradient(160deg, #1E1B4B 0%, #3B1F7A 40%, #5B21B6 100%);
    text-align: center;
}
.hero::before {
    content: 'あいうえおかきくけこさしすせそたちつてとなにぬねのはひふへほまみむめもやゆよらりるれろわをん';
    position: absolute; inset: -20px; font-family: 'Noto Serif JP', serif;
    font-size: 4rem; line-height: 1.4; letter-spacing: 0.4em;
    color: rgba(255,255,255,0.04); word-break: break-all; overflow: hidden; pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; max-width: 660px; margin: 0 auto; }
.hero h1 { font-size: 2.5rem; font-weight: 800; line-height: 1.35; margin-bottom: 20px; color: #FFFFFF; }
.hero p { font-size: 1.05rem; color: rgba(255,255,255,0.72); margin-bottom: 36px; line-height: 1.8; }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }

/* --- Buttons --- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; font-size: 0.95rem; font-weight: 600; border-radius: 10px; transition: all 0.25s; text-align: center; border: none; cursor: pointer; text-decoration: none; }
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(91,33,182,0.25); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: var(--white); }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }

/* --- Section --- */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); }
.section-header { text-align: center; margin-bottom: 44px; }
.section-title { font-size: 1.8rem; font-weight: 800; margin-bottom: 10px; }
.section-subtitle { font-size: 1rem; color: var(--text-light); max-width: 560px; margin: 0 auto; }

/* --- Cards --- */
.card { background: var(--white); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); transition: all 0.25s; }
.card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(91,33,182,0.1); border-color: var(--primary-pale); }
.card a { display: block; }
.card-body { padding: 16px 20px 20px; }
.card-cat { display: inline-block; font-size: 0.78rem; font-weight: 600; color: var(--primary); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.04em; }
.card-title { font-size: 1rem; margin-bottom: 8px; line-height: 1.5; }
.card-title a { color: var(--text); }
.card-title a:hover { color: var(--primary); }
.card-excerpt { font-size: 0.85rem; color: var(--text-light); line-height: 1.7; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-meta { display: flex; gap: 14px; font-size: 0.78rem; color: var(--text-light); }

/* --- Category Card --- */
.cat-card { display: block; background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 20px; text-align: center; transition: all 0.25s; }
.cat-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(91,33,182,0.1); border-color: var(--primary-pale); }
.cat-card img { width: 48px; height: 48px; margin-bottom: 14px; }
.cat-card h3 { font-size: 1rem; margin-bottom: 6px; }
.cat-card p { font-size: 0.82rem; color: var(--text-light); margin-bottom: 8px; line-height: 1.6; }
.cat-card .count { font-size: 0.75rem; color: var(--primary); font-weight: 600; }

/* --- Level Tabs --- */
.level-tabs { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 32px; }
.level-tab { padding: 8px 20px; border-radius: 8px; font-size: 0.9rem; font-weight: 600; border: 2px solid var(--border); color: var(--text-light); background: var(--white); transition: all 0.2s; cursor: pointer; }
.level-tab:hover { border-color: var(--primary); color: var(--primary); }
.level-tab.active { background: var(--primary); color: var(--white); border-color: var(--primary); }
.level-panel { display: none; }
.level-panel.active { display: block; }
.level-empty { text-align: center; padding: 48px 20px; color: var(--text-light); }

/* --- Breadcrumbs --- */
.breadcrumbs { font-size: 0.85rem; color: var(--text-light); margin-bottom: 24px; padding-top: 8px; }
.breadcrumbs a { color: var(--text-light); }
.breadcrumbs a:hover { color: var(--primary); }

/* --- Article Body --- */
.article-body { font-size: 1rem; line-height: 2; }
.article-body h2 { font-size: 1.4rem; margin: 36px 0 14px; padding-bottom: 8px; border-bottom: 2px solid var(--primary-pale); }
.article-body h3 { font-size: 1.15rem; margin: 24px 0 10px; }
.article-body p { margin-bottom: 16px; }
.article-body a { color: var(--primary); font-weight: 600; }
.article-body a:hover { text-decoration: underline; }
.article-body blockquote { margin: 24px 0; padding: 20px 24px; background: var(--primary-pale); border-left: 4px solid var(--primary); border-radius: 0 var(--radius) var(--radius) 0; }
.article-body blockquote p { margin-bottom: 0; }

/* --- Example Block --- */
.example-block { background: #1E1B4B; border-radius: var(--radius); padding: 28px; margin: 20px 0; text-align: center; }
.example-text { font-family: 'Noto Serif JP', serif; font-size: 2.2rem; color: #FFFFFF; letter-spacing: 0.1em; margin-bottom: 6px; line-height: 1.5; }
.example-reading { font-family: 'Inter', sans-serif; font-size: 0.88rem; color: #A78BFA; margin-bottom: 4px; }
.example-translation { font-size: 0.82rem; color: #9CA3AF; }

/* --- Article Tags --- */
.article-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border); }
.article-tag { font-size: 0.82rem; color: var(--primary); background: var(--primary-pale); padding: 4px 12px; border-radius: 20px; }

/* --- Article Meta --- */
.article-meta { display: flex; gap: 16px; font-size: 0.85rem; color: var(--text-light); margin-bottom: 32px; flex-wrap: wrap; }
.article-meta a { color: var(--primary); }

/* --- Article Info Card --- */
.info-card { background: var(--bg-alt); border-radius: var(--radius); padding: 20px; }
.info-row { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 0.88rem; }
.info-row:last-child { border-bottom: none; }
.info-label { color: var(--text-light); }

/* --- Related --- */
.related { margin-top: 48px; padding-top: 40px; border-top: 1px solid var(--border); }
.related h2 { font-size: 1.3rem; margin-bottom: 24px; }

/* --- Sidebar --- */
.sidebar { position: sticky; top: 90px; }
.sidebar-widget { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; }
.sidebar-title { font-size: 0.95rem; font-weight: 700; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 2px solid var(--primary-pale); }
.sidebar-list { list-style: none; }
.sidebar-list li { border-bottom: 1px solid var(--border); }
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list a { display: flex; justify-content: space-between; padding: 10px 0; font-size: 0.88rem; color: var(--text); transition: color 0.2s; }
.sidebar-list a:hover { color: var(--primary); }
.sidebar-list .count { color: var(--primary); font-weight: 600; font-size: 0.82rem; }
.sidebar-search { display: flex; gap: 8px; }
.sidebar-search input { flex: 1; padding: 10px 14px; border: 2px solid var(--border); border-radius: 8px; font-size: 0.9rem; }
.sidebar-search input:focus { outline: none; border-color: var(--primary); }
.sidebar-search button { padding: 10px 18px; background: var(--primary); color: var(--white); border-radius: 8px; font-weight: 600; font-size: 0.85rem; }
.sidebar-cta { background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: var(--white); border: none; }
.sidebar-cta .sidebar-title { color: var(--white); border-bottom-color: rgba(255,255,255,0.2); }
.sidebar-cta p { font-size: 0.88rem; color: rgba(255,255,255,0.8); margin-bottom: 14px; }
.sidebar-cta a { display: inline-block; background: var(--white); color: var(--primary); padding: 10px 24px; border-radius: 8px; font-weight: 600; font-size: 0.88rem; }

/* Mini article cards in sidebar */
.mini-card { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.mini-card:last-child { border-bottom: none; }
.mini-card-img { width: 64px; height: 44px; border-radius: 6px; overflow: hidden; flex-shrink: 0; background: var(--primary-pale); }
.mini-card-img img { width: 100%; height: 100%; object-fit: cover; }
.mini-card-body { flex: 1; min-width: 0; }
.mini-card-title { font-size: 0.82rem; font-weight: 600; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.mini-card-title a { color: var(--text); }
.mini-card-title a:hover { color: var(--primary); }
.mini-card-date { font-size: 0.72rem; color: var(--text-light); margin-top: 3px; }

/* --- Search --- */
.search-form { display: flex; gap: 10px; margin-bottom: 28px; }
.search-form input { flex: 1; padding: 12px 16px; border: 2px solid var(--border); border-radius: 10px; font-size: 0.95rem; }
.search-form input:focus { outline: none; border-color: var(--primary); }
.search-form button { padding: 12px 24px; background: var(--primary); color: var(--white); border-radius: 10px; font-weight: 600; }

/* --- Pagination --- */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; }
.pg-link { padding: 8px 16px; border: 2px solid var(--border); border-radius: 8px; font-size: 0.88rem; font-weight: 600; color: var(--text-light); transition: all 0.2s; }
.pg-link:hover { border-color: var(--primary); color: var(--primary); }
.pg-link.pg-active { background: var(--primary); color: var(--white); border-color: var(--primary); }

/* --- FAQ --- */
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 10px; background: var(--white); overflow: hidden; }
.faq-q { width: 100%; padding: 18px 20px; display: flex; justify-content: space-between; align-items: center; font-size: 0.95rem; font-weight: 600; text-align: left; cursor: pointer; }
.faq-q .icon { font-size: 1.2rem; color: var(--primary); transition: transform 0.3s; }
.faq-q.open .icon { transform: rotate(45deg); }
.faq-a { padding: 0 20px 18px; font-size: 0.9rem; color: var(--text-light); line-height: 1.8; display: none; }
.faq-a.open { display: block; }
.faq-a a { color: var(--primary); }

/* --- Newsletter --- */
.newsletter { background: linear-gradient(135deg, var(--primary), var(--primary-light)); padding: 64px 0; text-align: center; color: var(--white); }
.newsletter h2 { font-size: 1.5rem; margin-bottom: 8px; color: var(--white); }
.newsletter p { color: rgba(255,255,255,0.75); margin-bottom: 24px; }
.newsletter form { display: flex; gap: 10px; max-width: 440px; margin: 0 auto; }
.newsletter input { flex: 1; padding: 14px 18px; border: none; border-radius: 10px; font-size: 0.95rem; }
.newsletter button { padding: 14px 28px; background: var(--white); color: var(--primary); border-radius: 10px; font-weight: 700; font-size: 0.95rem; }

/* --- Footer --- */
.site-footer { background: #1E1B4B; color: rgba(255,255,255,0.7); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand p { font-size: 0.85rem; line-height: 1.7; margin-top: 14px; }
.site-footer h4 { color: var(--white); font-size: 0.9rem; margin-bottom: 16px; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: rgba(255,255,255,0.6); font-size: 0.85rem; transition: color 0.2s; }
.site-footer a:hover { color: var(--white); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; text-align: center; font-size: 0.8rem; }

/* --- Legal Pages --- */
.legal-page { max-width: 780px; margin: 0 auto; padding: 32px 0 80px; }
.legal-page h1 { margin-bottom: 8px; }
.legal-date { color: var(--text-light); font-size: 0.88rem; margin-bottom: 36px; }
.legal-page h2 { font-size: 1.25rem; margin: 28px 0 10px; }
.legal-page p { color: var(--text-light); line-height: 1.9; margin-bottom: 14px; }
.legal-page a { color: var(--primary); text-decoration: underline; }

/* --- Form --- */
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.88rem; font-weight: 600; margin-bottom: 6px; }
.form-group input, .form-group textarea { width: 100%; padding: 12px 16px; border: 2px solid var(--border); border-radius: 10px; font-size: 0.95rem; font-family: inherit; }
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); }
.form-group textarea { min-height: 140px; resize: vertical; }

/* --- About --- */
.about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 32px; }
.about-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 20px; text-align: center; }
.about-card h3 { font-size: 1rem; margin: 12px 0 8px; }
.about-card p { font-size: 0.85rem; color: var(--text-light); line-height: 1.6; }

/* --- Responsive --- */
@media (max-width: 1024px) {
    .sidebar-layout { grid-template-columns: 1fr; }
    .sidebar { position: static; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .nav-list { display: none; }
    .hamburger { display: flex; }
    .hero h1 { font-size: 2rem; }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-2 { grid-template-columns: 1fr; }
    .section { padding: 48px 0; }
    .footer-grid { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .hero h1 { font-size: 1.6rem; }
    .hero p { font-size: 0.95rem; }
    .grid-3 { grid-template-columns: 1fr; }
    .section-title { font-size: 1.5rem; }
    .example-text { font-size: 1.7rem; }
    .example-block { padding: 20px 14px; }
    .newsletter form { flex-direction: column; }
}