:root {
    --nb-navy-950: #142131;
    --nb-navy-900: #1d3042;
    --nb-navy-800: #2f485d;
    --nb-blue-600: #416f8b;
    --nb-blue-100: #e9f0f3;
    --nb-ink: #28343b;
    --nb-muted: #68747a;
    --nb-line: #dce2df;
    --nb-paper: #fbfcfa;
    --nb-surface: #ffffff;
    --nb-tint: #f2f5f2;
    --nb-tint-blue: #eef3f5;
    --nb-success: #477468;
    --nb-danger: #a14444;
    --nb-radius: 6px;
    --nb-shadow: 0 1px 2px rgba(20, 33, 49, .05);
    --nb-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Yu Gothic UI", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}

html { scroll-behavior: smooth; }
body.nb-site { background: var(--nb-paper); color: var(--nb-ink); font-family: var(--nb-font-sans); line-height: 1.75; margin: 0; }
.nb-site *, .nb-site *::before, .nb-site *::after { box-sizing: border-box; }
.nb-site img { height: auto; max-width: 100%; }
.nb-site a { color: var(--nb-blue-600); text-decoration-thickness: 1px; text-underline-offset: .2em; }
.nb-site a:hover { color: var(--nb-navy-900); }
.nb-site button, .nb-site input, .nb-site select, .nb-site textarea { font: inherit; }
.nb-site button, .nb-site input, .nb-site select, .nb-site textarea { border-color: var(--nb-line); }
.nb-site :focus-visible { outline: 3px solid rgba(65, 111, 139, .32); outline-offset: 3px; }
.nb-shell { margin-inline: auto; max-width: 1180px; padding-inline: clamp(16px, 4vw, 34px); width: 100%; }
.nb-main { min-height: 60vh; }
.nb-skip-link { background: #fff; left: 1rem; padding: .6rem 1rem; position: fixed; top: -100px; z-index: 100010; }
.nb-skip-link:focus { top: 1rem; }

.nb-site-header { background: rgba(255, 255, 255, .98); border-bottom: 1px solid var(--nb-line); color: var(--nb-navy-900); position: relative; z-index: 1000; }
.nb-site-header__inner { align-items: center; display: grid; gap: .75rem 1.5rem; grid-template-columns: minmax(11rem, 1fr) auto auto; min-height: 66px; position: relative; }
.nb-site-brand { color: var(--nb-navy-900) !important; font-size: clamp(1.05rem, 2.3vw, 1.28rem); font-weight: 650; letter-spacing: .02em; text-decoration: none; }
.nb-primary-nav { grid-column: 2; grid-row: 1; }
.nb-menu, .nb-footer-menu { display: flex; flex-wrap: wrap; gap: .4rem 1.25rem; list-style: none; margin: 0; padding: 0; }
.nb-menu a { color: var(--nb-navy-800) !important; display: block; padding: .55rem .15rem; text-decoration: none; }
.nb-menu .current-menu-item > a, .nb-menu a:hover { text-decoration: underline; text-decoration-thickness: 2px; }
.nb-menu-toggle { display: none; }
.nb-menu-toggle, .nb-search-toggle { background: var(--nb-surface); border: 1px solid var(--nb-line); border-radius: var(--nb-radius); color: var(--nb-navy-800); cursor: pointer; padding: .42rem .7rem; }
.nb-search-toggle { grid-column: 3; grid-row: 1; }
.nb-header-search { background: var(--nb-surface); border-bottom: 1px solid var(--nb-line); box-shadow: var(--nb-shadow); left: 0; padding: .8rem max(16px, calc((100vw - 1112px) / 2)); position: absolute; right: 0; top: 100%; }
.nb-header-search[hidden], .nb-primary-nav[hidden] { display: none; }
.nb-header-search .search-form { display: flex; gap: .5rem; margin: auto; max-width: 720px; }
.nb-header-search label { flex: 1; }
.nb-header-search input[type="search"] { min-height: 42px; padding: .5rem; width: 100%; }
.nb-header-search input[type="submit"] { min-height: 42px; }

.nb-hero { background: var(--nb-tint-blue); border-bottom: 1px solid var(--nb-line); color: var(--nb-ink); padding: clamp(2.8rem, 7vw, 4.8rem) 0; }
.nb-hero .nb-shell { border-left: 3px solid var(--nb-blue-600); padding-left: clamp(1.2rem, 4vw, 2rem); }
.nb-hero h1 { color: var(--nb-navy-900); font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 650; letter-spacing: .01em; line-height: 1.2; margin: 0 0 .55rem; }
.nb-hero p:last-child { color: var(--nb-muted); font-size: clamp(1rem, 2vw, 1.12rem); margin: 0; max-width: 43rem; }
.nb-eyebrow { color: var(--nb-muted); font-size: .78rem; font-weight: 700; letter-spacing: .08em; margin: 0 0 .3rem; }
.nb-section { padding: clamp(2.8rem, 6vw, 4.5rem) 0; }
.nb-section--tint { background: var(--nb-tint); }
.nb-section__heading { align-items: end; display: flex; gap: 1rem; justify-content: space-between; margin-bottom: 1.5rem; }
.nb-section__heading h2, .nb-archive-section > h2 { color: var(--nb-navy-900); font-size: clamp(1.45rem, 3.4vw, 1.9rem); font-weight: 650; line-height: 1.35; margin: 0; }

.nb-card-grid { display: grid; gap: clamp(1rem, 2.5vw, 1.6rem); }
.nb-card-grid--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.nb-card-grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.nb-post-grid { align-items: start; display: grid; gap: 1.1rem; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.nb-card { background: var(--nb-surface); border: 1px solid var(--nb-line); border-radius: var(--nb-radius); box-shadow: var(--nb-shadow); min-width: 0; overflow: hidden; }
.nb-card__body { padding: clamp(1rem, 2.5vw, 1.35rem); }
.nb-card__title { font-size: clamp(1.1rem, 2.1vw, 1.28rem); font-weight: 650; line-height: 1.5; margin: .3rem 0 .55rem; overflow-wrap: anywhere; }
.nb-card__title a { color: var(--nb-navy-900); text-decoration: none; }
.nb-card__title a:hover { text-decoration: underline; }
.nb-card__meta { align-items: center; color: var(--nb-muted); display: flex; flex-wrap: wrap; font-size: .82rem; gap: .35rem .8rem; margin: 0; }
.nb-post-card__image { aspect-ratio: 5 / 2; background: var(--nb-tint); display: block; overflow: hidden; }
.nb-post-card__image img { height: 100%; object-fit: cover; transition: transform .25s ease; width: 100%; }
.nb-post-card__image:hover img { transform: scale(1.025); }
.nb-badge { background: var(--nb-blue-100); border-radius: 4px; color: var(--nb-navy-800); font-weight: 700; padding: .16rem .48rem; }
.nb-novel-card { border-top: 2px solid var(--nb-blue-600); }
.nb-tool-card__icon { align-items: center; background: var(--nb-blue-100); border-radius: 4px; color: var(--nb-navy-900); display: inline-flex; font-weight: 750; justify-content: center; min-height: 2.6rem; min-width: 2.6rem; padding: .35rem; }

.nb-list-page, .nb-article-layout, .nb-reading-page, .nb-tool-layout, .nb-not-found { padding-bottom: clamp(4rem, 8vw, 7rem); }
.nb-page-header { border-bottom: 1px solid var(--nb-line); margin-bottom: clamp(1.6rem, 4vw, 2.6rem); padding: clamp(2.2rem, 6vw, 4rem) 0 clamp(1.2rem, 3vw, 1.8rem); }
.nb-page-header h1 { color: var(--nb-navy-900); font-size: clamp(1.8rem, 5vw, 2.8rem); font-weight: 650; line-height: 1.3; margin: 0; overflow-wrap: anywhere; }
.nb-page-header--compact { margin-bottom: 1.75rem; padding-bottom: 1.25rem; }
.nb-page-header--episode { margin-bottom: .5rem; padding-bottom: 1rem; }
.nb-page-header--episode h1 { font-size: clamp(1.7rem, 4.5vw, 2.7rem); }
.nb-category-guide { background: var(--nb-tint); border: 1px solid var(--nb-line); border-radius: var(--nb-radius); margin: 0 0 2rem; padding: 1rem 1.2rem; }
.nb-category-guide h2 { font-size: 1.05rem; margin: 0 0 .6rem; }
.nb-category-guide ul { display: flex; flex-wrap: wrap; gap: .5rem; list-style: none; margin: 0; padding: 0; }
.nb-category-guide a { background: var(--nb-surface); border: 1px solid var(--nb-line); border-radius: 4px; display: flex; gap: .5rem; padding: .35rem .7rem; text-decoration: none; }
.nb-category-guide a span { color: var(--nb-muted); }
.nb-archive-section + .nb-archive-section { margin-top: 3rem; }
.nb-archive-section > h2 { margin-bottom: 1rem; }
.nb-empty { background: var(--nb-tint); border: 1px dashed #acb6c0; padding: 2rem; text-align: center; }

.nb-article { margin-inline: auto; max-width: 850px; }
.nb-article__hero { margin: 0 0 2rem; }
.nb-entry-content { font-size: 1.04rem; }
.nb-entry-content > * { max-width: 100%; }
.nb-entry-content h2 { border-bottom: 1px solid var(--nb-line); color: var(--nb-navy-900); font-weight: 650; margin-top: 2.6em; padding-bottom: .4em; }
.nb-entry-content h3 { border-left: 4px solid var(--nb-blue-600); padding-left: .7em; }
.nb-article__categories a { background: var(--nb-blue-100); border-radius: 4px; font-size: .82rem; padding: .2rem .6rem; text-decoration: none; }
.nb-site .sns-share .sns-button,
.nb-site .sns-share .sns-button:hover,
.nb-site .sns-share .sns-button:focus,
.nb-site .sns-share .sns-button .social-icon,
.nb-site .sns-share .sns-button .button-caption,
.nb-site .sns-share .sns-button .share-count { color: #fff !important; }
.nb-post-navigation { display: grid; gap: 1rem; grid-template-columns: 1fr 1fr; margin: 3rem auto; max-width: 850px; }
.nb-post-navigation a { border: 1px solid var(--nb-line); display: block; padding: 1rem; }

.nb-reading-page { max-width: 1240px; }
.nb-reading-page > .nb-novel { margin-inline: auto; max-width: 960px; }
.nb-tool-layout { max-width: 1120px; }
.nb-search-filter { display: grid; gap: .6rem; grid-template-columns: minmax(12rem, 1fr) auto auto; margin-top: 1rem; }
.nb-search-filter input, .nb-search-filter select, .nb-search-filter button { min-height: 44px; padding: .45rem .65rem; width: 100%; }
.nb-search-results { display: grid; gap: 1rem; }
.nav-links { display: flex; flex-wrap: wrap; gap: .4rem; justify-content: center; margin-top: 2rem; }
.nav-links .page-numbers { align-items: center; border: 1px solid var(--nb-line); display: inline-flex; height: auto; justify-content: center; line-height: 1.4; min-height: 2.75rem; min-width: 2.75rem; padding: .45rem .75rem; text-align: center; white-space: nowrap; width: auto; }
.nav-links .page-numbers.prev, .nav-links .page-numbers.next { min-width: max-content; }
.nav-links .current { background: var(--nb-navy-900); color: #fff; }
.nb-quick-links { display: flex; flex-wrap: wrap; gap: .6rem; margin: 2rem 0; }
.nb-quick-links a { border: 1px solid var(--nb-line); padding: .6rem 1rem; }

.nb-site-footer { background: var(--nb-navy-950); color: #d7e0e4; padding: 2.6rem 0 1rem; }
.nb-site-footer a { color: #e8f1fa; }
.nb-site-footer__inner { display: grid; gap: 2rem; grid-template-columns: 1fr auto; }
.nb-site-footer__copyright { border-top: 1px solid #ffffff26; font-size: .8rem; margin: 2rem auto 0; max-width: 1112px; padding: 1rem 16px 0; text-align: center; }

@media (max-width: 800px) {
    .nb-site-header { position: sticky; top: 0; }
    .nb-site-header__inner { grid-template-columns: minmax(0, 1fr) auto auto; }
    .nb-search-toggle { grid-column: 2; }
    .nb-menu-toggle { display: inline-flex; gap: .35rem; grid-column: 3; grid-row: 1; }
    .nb-primary-nav { background: #fff; border-bottom: 1px solid var(--nb-line); border-top: 1px solid var(--nb-line); box-shadow: var(--nb-shadow); grid-column: 1 / -1; left: 0; padding: .5rem clamp(16px, 4vw, 34px) 1rem; position: absolute; right: 0; top: 100%; }
    .nb-menu { display: grid; gap: 0; }
    .nb-menu a { border-bottom: 1px solid var(--nb-line); padding: .7rem 0; }
    .nb-post-grid, .nb-card-grid--two, .nb-card-grid--three { grid-template-columns: 1fr; }
    .nb-post-grid .nb-post-card:first-child { grid-row: auto; }
    .nb-post-card__image { aspect-ratio: 2 / 1; }
    .nb-site-footer__inner { grid-template-columns: 1fr; }
    .nb-footer-menu { display: grid; }
}

@media (max-width: 540px) {
    .nb-menu-toggle span:last-child { display: none; }
    .nb-section__heading { align-items: flex-start; flex-direction: column; }
    .nb-search-filter { grid-template-columns: 1fr; }
    .nb-post-navigation { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}