/*
 * 9ブログ 公開サイト用 CSS
 *
 * すべてのセレクタは .nb- プレフィクス（NineBlog）で
 * Social9 既存 CSS / 聖徳太子（.sh2-）/ 旧 Shotoku/blog（.shb-）と衝突しない。
 *
 * デザイン方針:
 *   - 聖徳太子2.0 と同系統のラベンダー（#7c5cff）+ 9 のアクセント（ティール）
 *   - 一般訪問者にも美しい LP として機能する
 *   - **ヘッダー・フッター・一覧（カードグリッド）は画面幅いっぱいまで使う**
 *     （`--nb-max: none` で制限なし。広い画面では PC ブラウザの全領域を活用）
 *   - **記事本文（.nb-post）は読みやすさ最優先で 880px 上限**
 *     （line-height 1.85。横長すぎると行頭→行末の視線移動が辛いため、
 *     ここだけは意図的に上限を残す。詳しくは .nb-post のコメント参照）
 *   - 携帯版は @media (max-width: 480px) で padding を 16px に絞り、
 *     カードは 1 列、ヘッダー CTA は折り返す
 */

:root {
    --nb-primary: #7c5cff;
    --nb-primary-700: #6442e6;
    --nb-primary-100: #ece7ff;
    --nb-accent: #1f9d8e;             /* 9 のティール */
    --nb-accent-soft: #e6f7f4;
    --nb-bg: #ffffff;
    --nb-bg-soft: #faf8ff;
    --nb-bg-alt: #f3effd;
    --nb-text: #1f1933;
    --nb-text-soft: #4a4660;
    --nb-text-mute: #6b6680;
    --nb-border: #e6e0f7;
    --nb-border-strong: #cabff0;
    --nb-radius: 12px;
    --nb-radius-lg: 18px;
    --nb-shadow: 0 8px 24px rgba(124, 92, 255, 0.08);
    --nb-shadow-lg: 0 18px 48px rgba(124, 92, 255, 0.16);
    /* ヘッダー・フッター・一覧などの「外枠」は画面いっぱいに広げる（PC で左右の余白を活用）。
       中身の上限を絞りたい個別箇所では .nb-narrow / .nb-post の固有 max-width を使う。 */
    --nb-max: none;
    /* フォーム・狭幅セクション用。読みやすさを保ちつつ、旧 760px より少し広めに */
    --nb-narrow: 1100px;
    /* 記事本文（.nb-post）の上限。横長すぎると視線移動が辛いため意図的に狭く保つ */
    --nb-read: 880px;
    --nb-font: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic UI', system-ui, -apple-system, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

.nb-body {
    margin: 0;
    background: var(--nb-bg);
    color: var(--nb-text);
    font-family: var(--nb-font);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

.nb-skip-link {
    position: absolute;
    left: -9999px;
    top: auto;
    width: 1px; height: 1px;
    overflow: hidden;
}
.nb-skip-link:focus {
    position: fixed;
    left: 16px; top: 16px;
    width: auto; height: auto;
    padding: 8px 16px;
    background: var(--nb-primary);
    color: #fff;
    border-radius: 8px;
    z-index: 9999;
}

.nb-container {
    /* PC: 画面幅いっぱい（左右 32px パディングで端に貼り付かない）
       携帯: @media (max-width: 480px) で 16px に縮める */
    width: 100%;
    max-width: var(--nb-max);
    margin: 0 auto;
    padding: 0 32px;
}
/* 個別ページで「やや狭め」にしたいときに付与（フォーム等） */
.nb-narrow { max-width: var(--nb-narrow); }

/* ===== Header ===== */
.nb-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--nb-border);
}
.nb-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
    gap: 8px 12px;
    min-height: 68px;
    padding: 8px 0;
    /* 狭いデスクトップでも「記事を書く」が2行目に落ちないよう 1 行を維持（必要なら横スクロール） */
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-gutter: stable;
}
.nb-header-tools {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    flex-shrink: 0;
    gap: 8px 12px;
}
.nb-lang-group {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}
.nb-lang-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--nb-text-mute);
    letter-spacing: 0.02em;
    white-space: nowrap;
    line-height: 1.2;
}
.nb-lang-select {
    font-size: 13px;
    padding: 6px 26px 6px 8px;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    background: var(--nb-bg);
    color: var(--nb-text);
    min-width: 104px;
    max-width: 140px;
    cursor: pointer;
}
.nb-lang-select:hover {
    background: #eef2ff;
}
.nb-nav {
    /* 圧縮されてもメニュー文字が1文字ずつ縦に折り返されないよう、コンテンツ幅は維持。
       入りきらない場合は親 .nb-header-inner の overflow-x: auto で横スクロールに任せる。 */
    flex: 0 1 auto;
    min-width: 0;
    flex-shrink: 0;
}

@media (max-width: 1180px) {
    .nb-nav-list { gap: 4px; }
    .nb-nav-list a {
        padding: 8px 10px;
        font-size: 13px;
    }
    .nb-lang-select {
        min-width: 100px;
        font-size: 12px;
        padding: 6px 24px 6px 6px;
    }
}

@media (max-width: 880px) {
    .nb-header-inner {
        flex-wrap: nowrap;
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
    }
    .nb-nav { display: none; }
    .nb-nav-toggle { display: inline-flex; }
    .nb-header-cta .nb-btn-ghost { display: none; }
    .nb-header-tools {
        width: auto;
        margin-left: auto;
        justify-content: flex-end;
        flex-wrap: nowrap;
        flex-shrink: 0;
    }
    .nb-lang-label {
        max-width: 4.5rem;
    }
    .nb-lang-select {
        min-width: 0;
        max-width: 120px;
        flex: 0 1 auto;
    }
}
.nb-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--nb-text);
    flex-shrink: 0;
}
.nb-brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px; height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--nb-primary) 0%, var(--nb-accent) 100%);
    color: #fff;
    font-weight: 800;
    font-size: 20px;
    box-shadow: var(--nb-shadow);
}
.nb-brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.nb-brand-name { font-weight: 700; font-size: 17px; }
.nb-brand-tag  { font-size: 11px; color: var(--nb-text-mute); letter-spacing: 0.04em; }

.nb-nav-list {
    display: flex;
    flex-wrap: nowrap;
    gap: 6px;
    list-style: none;
    list-style: none;
    margin: 0;
    padding: 0;
}
.nb-nav-list li {
    flex-shrink: 0;
}
.nb-nav-list a {
    display: inline-block;
    white-space: nowrap;
    padding: 8px 14px;
    border-radius: 999px;
    text-decoration: none;
    color: var(--nb-text-soft);
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
}
.nb-nav-list a:hover { background: var(--nb-bg-alt); color: var(--nb-primary-700); }
.nb-nav-list a[aria-current="page"] {
    background: var(--nb-primary-100);
    color: var(--nb-primary-700);
    font-weight: 700;
}

.nb-header-cta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}
.nb-header-user {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--nb-primary-100);
    color: var(--nb-primary-700);
    font-weight: 700;
    text-decoration: none;
}

.nb-nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    background: transparent;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    width: 44px;
    height: 44px;
    padding: 0;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}
.nb-nav-toggle:hover { background: #eef2ff; }
.nb-nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--nb-text);
    border-radius: 2px;
}

.nb-nav-mobile {
    display: none;
    border-top: 1px solid var(--nb-border);
    background: #fff;
    box-shadow: 0 12px 24px rgba(31, 25, 51, 0.08);
}
.nb-nav-mobile:not([hidden]) {
    display: block;
}
.nb-nav-mobile ul {
    list-style: none;
    margin: 0;
    padding: 8px 0 16px;
}
.nb-nav-mobile li a {
    display: flex;
    align-items: center;
    padding: 14px 24px;
    min-height: 48px;
    line-height: 1.3;
    color: var(--nb-text);
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    border-bottom: 1px solid var(--nb-border);
}
.nb-nav-mobile li:last-child a { border-bottom: none; }
.nb-nav-mobile li a:hover,
.nb-nav-mobile li a:focus-visible {
    background: var(--nb-bg-soft);
    color: var(--nb-primary-700);
    outline: none;
}

/* ===== Buttons ===== */
.nb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: 999px;
    border: 1.5px solid transparent;
    background: transparent;
    color: var(--nb-text);
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.15s;
    line-height: 1.2;
}
.nb-btn:hover { transform: translateY(-1px); }
.nb-btn-primary {
    background: linear-gradient(135deg, var(--nb-primary) 0%, var(--nb-accent) 100%);
    color: #fff;
    box-shadow: var(--nb-shadow);
}
.nb-btn-primary:hover { box-shadow: var(--nb-shadow-lg); }
.nb-btn-ghost {
    background: transparent;
    color: var(--nb-text-soft);
    border-color: var(--nb-border-strong);
}
.nb-btn-ghost:hover { background: var(--nb-bg-soft); color: var(--nb-primary-700); }
.nb-btn-sm { padding: 6px 14px; font-size: 13px; }
.nb-btn-lg { padding: 14px 28px; font-size: 16px; }
.nb-btn-block { width: 100%; }

/* ===== Hero（LP のヒーロー） ===== */
.nb-hero {
    position: relative;
    padding: 80px 0 64px;
    background: linear-gradient(180deg, var(--nb-bg-soft) 0%, var(--nb-bg) 100%);
    overflow: hidden;
}
.nb-hero::before {
    content: '';
    position: absolute;
    top: -120px; right: -80px;
    width: 360px; height: 360px;
    background: radial-gradient(circle, var(--nb-primary-100) 0%, transparent 70%);
    pointer-events: none;
}
.nb-hero::after {
    content: '';
    position: absolute;
    bottom: -120px; left: -120px;
    width: 360px; height: 360px;
    background: radial-gradient(circle, var(--nb-accent-soft) 0%, transparent 70%);
    pointer-events: none;
}
.nb-hero-inner {
    position: relative;
    text-align: center;
    z-index: 1;
}
.nb-hero-eyebrow {
    display: inline-block;
    padding: 6px 14px;
    background: var(--nb-primary-100);
    color: var(--nb-primary-700);
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 20px;
}
.nb-hero-title {
    font-size: clamp(32px, 5vw, 52px);
    line-height: 1.25;
    font-weight: 800;
    margin: 0 0 16px;
    letter-spacing: -0.01em;
    background: linear-gradient(135deg, var(--nb-primary-700) 0%, var(--nb-accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.nb-hero-lead {
    font-size: clamp(15px, 2vw, 18px);
    color: var(--nb-text-soft);
    max-width: 640px;
    margin: 0 auto 32px;
}
.nb-hero-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

/* ===== Section ===== */
.nb-section { padding: 64px 0; }
.nb-section-soft { background: var(--nb-bg-soft); }
.nb-section-head { text-align: center; margin-bottom: 40px; }
.nb-section-eyebrow {
    color: var(--nb-accent);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.nb-section-title {
    font-size: clamp(22px, 3vw, 30px);
    font-weight: 800;
    margin: 8px 0 12px;
    color: var(--nb-text);
}
.nb-section-lead {
    color: var(--nb-text-soft);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Principles ===== */
.nb-principles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}
.nb-principle {
    background: #fff;
    border: 1px solid var(--nb-border);
    border-radius: var(--nb-radius-lg);
    padding: 24px;
    transition: transform 0.15s, box-shadow 0.15s;
}
.nb-principle:hover { transform: translateY(-2px); box-shadow: var(--nb-shadow); }
.nb-principle-icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 44px; height: 44px;
    border-radius: 12px;
    background: var(--nb-primary-100);
    color: var(--nb-primary-700);
    font-size: 22px;
    margin-bottom: 16px;
}
.nb-principle-title { font-weight: 700; font-size: 16px; margin: 0 0 8px; }
.nb-principle-desc  { font-size: 14px; color: var(--nb-text-soft); margin: 0; }

/* ===== Posts grid（一覧） ===== */
.nb-posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.nb-post-card {
    background: #fff;
    border: 1px solid var(--nb-border);
    border-radius: var(--nb-radius-lg);
    overflow: hidden;
    transition: transform 0.15s, box-shadow 0.15s;
    display: flex;
    flex-direction: column;
}
.nb-post-card:hover { transform: translateY(-3px); box-shadow: var(--nb-shadow-lg); }
.nb-post-card a { color: inherit; text-decoration: none; }
.nb-post-card-body { padding: 20px; flex: 1; display: flex; flex-direction: column; gap: 10px; }
.nb-post-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: nowrap;
    max-width: 100%;
    min-height: 1.4em;
    font-size: 12px;
    color: var(--nb-text-mute);
    line-height: 1.35;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.nb-post-card-meta > span:last-child {
    flex-shrink: 0;
    white-space: nowrap;
    text-align: right;
}
.nb-post-card-cat {
    display: inline-block;
    padding: 3px 10px;
    background: var(--nb-primary-100);
    color: var(--nb-primary-700);
    border-radius: 999px;
    font-weight: 700;
    font-size: 11px;
}
.nb-post-card-title {
    font-size: 17px;
    font-weight: 700;
    line-height: 1.5;
    margin: 0;
    color: var(--nb-text);
}
.nb-post-card-excerpt {
    color: var(--nb-text-soft);
    font-size: 14px;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.nb-post-card-foot {
    margin-top: auto;
    display: flex; justify-content: space-between; align-items: center;
    font-size: 12px; color: var(--nb-text-mute);
}
.nb-post-card-author {
    display: inline-flex; align-items: center; gap: 6px;
}
.nb-post-card-author-mark {
    display: inline-flex; align-items: center; justify-content: center;
    width: 24px; height: 24px;
    border-radius: 50%;
    background: var(--nb-accent-soft);
    color: var(--nb-accent);
    font-size: 11px; font-weight: 700;
}
.nb-post-card-author-mark.is-ai { background: var(--nb-primary-100); color: var(--nb-primary-700); }

/* ===== Post（記事詳細） =====
   読書効率（1行あたり 60〜90 文字）を守るため、本文だけは意図的に狭めに保つ。
   全幅にすると改行が長くなりすぎて視線が次行頭に戻れず読みにくい。 */
.nb-post {
    max-width: var(--nb-read);
    margin: 0 auto;
    padding: 48px 24px 80px;
}
.nb-post-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--nb-border);
}
.nb-post-cat {
    display: inline-block;
    padding: 4px 12px;
    background: var(--nb-primary-100);
    color: var(--nb-primary-700);
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 14px;
    text-decoration: none;
}
.nb-post-title {
    font-size: clamp(24px, 4vw, 36px);
    line-height: 1.4;
    font-weight: 800;
    margin: 0 0 20px;
    color: var(--nb-text);
}
.nb-post-meta {
    display: flex; flex-wrap: wrap; gap: 14px;
    align-items: center;
    color: var(--nb-text-mute);
    font-size: 13px;
}
.nb-post-author {
    display: inline-flex; align-items: center; gap: 8px;
}
.nb-post-author-mark {
    display: inline-flex; align-items: center; justify-content: center;
    width: 28px; height: 28px;
    border-radius: 50%;
    background: var(--nb-accent-soft);
    color: var(--nb-accent);
    font-weight: 700; font-size: 12px;
}
.nb-post-author-mark.is-ai { background: var(--nb-primary-100); color: var(--nb-primary-700); }

.nb-post-body {
    font-size: 17px;
    line-height: 1.95;
    color: var(--nb-text);
    word-wrap: break-word;
}
.nb-post-body h2 {
    font-size: 26px;
    font-weight: 800;
    margin: 48px 0 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--nb-primary-100);
}
.nb-post-body h3 {
    font-size: 21px;
    font-weight: 700;
    margin: 32px 0 12px;
}
.nb-post-body p { margin: 0 0 20px; }
.nb-post-body ul, .nb-post-body ol { padding-left: 1.5em; margin: 0 0 20px; }
.nb-post-body li { margin: 6px 0; }
.nb-post-body blockquote {
    border-left: 4px solid var(--nb-primary);
    background: var(--nb-bg-soft);
    margin: 20px 0;
    padding: 12px 20px;
    color: var(--nb-text-soft);
    border-radius: 0 8px 8px 0;
}
.nb-post-body code {
    background: var(--nb-bg-alt);
    color: var(--nb-primary-700);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: 'SFMono-Regular', Menlo, Consolas, monospace;
    word-break: break-word;
}
.nb-post-body pre {
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding: 14px 16px;
    background: var(--nb-bg-alt);
    border: 1px solid var(--nb-border);
    border-radius: 10px;
    font-size: 14px;
    line-height: 1.55;
}
.nb-post-body table {
    display: block;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.nb-post-body a {
    color: var(--nb-primary-700);
    text-decoration: underline;
    text-decoration-color: var(--nb-primary-100);
    text-underline-offset: 3px;
}
.nb-post-body a:hover { text-decoration-color: var(--nb-primary); }
.nb-post-body img { max-width: 100%; height: auto; border-radius: var(--nb-radius); margin: 20px 0; }

.nb-post-tags {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--nb-border);
    display: flex; flex-wrap: wrap; gap: 8px;
}
.nb-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--nb-bg-soft);
    border: 1px solid var(--nb-border);
    color: var(--nb-text-soft);
    border-radius: 999px;
    font-size: 12px;
    text-decoration: none;
}
.nb-tag:hover { background: var(--nb-primary-100); color: var(--nb-primary-700); border-color: var(--nb-primary-100); }

/* ===== Pagination ===== */
.nb-pagination {
    display: flex; justify-content: center; gap: 6px;
    margin-top: 48px;
}
.nb-pagination a, .nb-pagination span {
    min-width: 40px; height: 40px;
    display: inline-flex; align-items: center; justify-content: center;
    padding: 0 12px;
    border-radius: 8px;
    border: 1px solid var(--nb-border);
    text-decoration: none;
    color: var(--nb-text-soft);
    font-weight: 600;
    font-size: 14px;
}
.nb-pagination a:hover { background: var(--nb-bg-soft); color: var(--nb-primary-700); }
.nb-pagination .nb-page-current {
    background: var(--nb-primary);
    color: #fff;
    border-color: var(--nb-primary);
}
.nb-pagination .nb-page-disabled { opacity: 0.4; }

/* ===== Sidebar ===== */
.nb-with-sidebar {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 40px;
}
.nb-sidebar { display: flex; flex-direction: column; gap: 24px; }
.nb-sidebar-block {
    background: #fff;
    border: 1px solid var(--nb-border);
    border-radius: var(--nb-radius-lg);
    padding: 20px;
}
.nb-sidebar-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--nb-text-mute);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin: 0 0 12px;
}
.nb-sidebar-list { list-style: none; padding: 0; margin: 0; }
.nb-sidebar-list li { padding: 6px 0; border-bottom: 1px solid var(--nb-border); }
.nb-sidebar-list li:last-child { border-bottom: none; }
.nb-sidebar-list a {
    display: flex; justify-content: space-between; align-items: center;
    color: var(--nb-text-soft);
    text-decoration: none;
    font-size: 14px;
}
.nb-sidebar-list a:hover { color: var(--nb-primary-700); }
.nb-sidebar-count {
    font-size: 11px;
    color: var(--nb-text-mute);
    background: var(--nb-bg-soft);
    padding: 2px 8px;
    border-radius: 999px;
}

@media (max-width: 880px) {
    .nb-with-sidebar { grid-template-columns: 1fr; }
}

/* ===== Forms（投稿フォーム） ===== */
.nb-form { display: flex; flex-direction: column; gap: 20px; }
.nb-form-row { display: flex; flex-direction: column; gap: 6px; }
.nb-form-row label {
    font-size: 13px;
    font-weight: 700;
    color: var(--nb-text-soft);
}
.nb-form-row .nb-form-help {
    font-size: 12px;
    color: var(--nb-text-mute);
    line-height: 1.6;
}
.nb-form-row input[type="text"],
.nb-form-row input[type="url"],
.nb-form-row select,
.nb-form-row textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--nb-border);
    border-radius: 10px;
    font-family: inherit;
    font-size: 15px;
    color: var(--nb-text);
    background: #fff;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.nb-form-row textarea {
    min-height: 320px;
    resize: vertical;
    line-height: 1.7;
    font-family: 'SFMono-Regular', Menlo, Consolas, 'Noto Sans JP', monospace;
    font-size: 14px;
}
.nb-form-row input:focus,
.nb-form-row select:focus,
.nb-form-row textarea:focus {
    outline: none;
    border-color: var(--nb-primary);
    box-shadow: 0 0 0 3px rgba(124, 92, 255, 0.18);
}
.nb-form-actions {
    display: flex; justify-content: flex-end; gap: 8px;
    margin-top: 8px;
}
.nb-form-error {
    background: #fff1f0;
    border: 1px solid #ffb4ad;
    color: #b91d3f;
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 14px;
}
.nb-form-success {
    background: var(--nb-accent-soft);
    border: 1px solid var(--nb-accent);
    color: #0e6d61;
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 14px;
}
.nb-form-notice {
    background: var(--nb-bg-soft);
    border: 1px dashed var(--nb-border-strong);
    color: var(--nb-text-soft);
    padding: 14px 16px;
    border-radius: 10px;
    font-size: 13px;
    line-height: 1.6;
}

/* ===== Footer ===== */
.nb-footer {
    background: var(--nb-bg-soft);
    border-top: 1px solid var(--nb-border);
    padding: 56px 0 28px;
    margin-top: 80px;
}
.nb-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 32px;
}
.nb-footer-desc { color: var(--nb-text-mute); font-size: 13px; max-width: 320px; margin-top: 12px; }
.nb-footer-col h4 {
    font-size: 13px;
    font-weight: 700;
    color: var(--nb-text);
    margin: 0 0 12px;
    letter-spacing: 0.04em;
}
.nb-footer-col ul { list-style: none; padding: 0; margin: 0; }
.nb-footer-col li { padding: 4px 0; }
.nb-footer-col a {
    color: var(--nb-text-soft);
    font-size: 13px;
    text-decoration: none;
}
.nb-footer-col a:hover { color: var(--nb-primary-700); }
.nb-footer-bottom {
    margin-top: 32px;
    padding-top: 16px;
    border-top: 1px solid var(--nb-border);
    color: var(--nb-text-mute);
    font-size: 12px;
}

@media (max-width: 720px) {
    /* タブレット〜小型 PC: 左右パディングを少し抑える */
    .nb-container { padding: 0 20px; }
    .nb-header-inner { gap: 10px; min-height: 60px; }
    .nb-brand-tag { display: none; }
    .nb-footer-grid { grid-template-columns: 1fr 1fr; }
    .nb-hero { padding: 56px 0 48px; }
    .nb-section { padding: 48px 0; }
    .nb-post { padding: 32px 16px 56px; }
    .nb-post-body { font-size: 16px; }
    .nb-post-body h2 { font-size: 22px; margin-top: 36px; }
    .nb-post-body h3 { font-size: 18px; }
    .nb-posts-grid { gap: 16px; }
    .nb-pagination { flex-wrap: wrap; gap: 8px; }
}

/* ===== Empty / status ===== */
.nb-empty {
    text-align: center;
    padding: 80px 24px;
    color: var(--nb-text-mute);
}
.nb-empty-icon { font-size: 48px; margin-bottom: 16px; }

/* ===== Showcase（最新記事ショーケース） ===== */
.nb-showcase {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 16px;
    grid-auto-flow: dense;
}
.nb-showcase .nb-post-card:first-child {
    grid-row: span 2;
}
.nb-showcase .nb-post-card:first-child .nb-post-card-title {
    font-size: 22px;
}
@media (max-width: 880px) {
    .nb-showcase { grid-template-columns: 1fr; grid-template-rows: auto; }
    .nb-showcase .nb-post-card:first-child { grid-row: auto; }
}

/* ===== Misc ===== */
.nb-divider {
    border: none;
    border-top: 1px solid var(--nb-border);
    margin: 48px 0;
}
.nb-text-center { text-align: center; }
.nb-mt-4 { margin-top: 32px; }

/* ===== 9ブログ自律執筆エージェント表示（AIバッジ / 原典 / CTA / 撤回） ===== */
.nb-ai-badge {
    display: flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, #fff8ed, #fef3e0);
    border: 1px solid #f3d6a0;
    border-radius: var(--nb-radius);
    padding: 12px 16px;
    margin: 16px 0 8px;
    font-size: 13px;
    color: #6b4f1a;
}
.nb-ai-badge-mark {
    flex: 0 0 auto;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #f4a93f;
    color: #fff;
    font-weight: 700;
    font-size: 13px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    letter-spacing: 0.5px;
}
.nb-ai-badge-text { line-height: 1.6; }
.nb-ai-badge-text strong { color: #5a3f10; }
.nb-ai-badge-text a { color: #b56a14; text-decoration: underline; }

.nb-retracted {
    background: #fde8e8;
    border: 1px solid #f5b5b5;
    color: #8a1f1f;
    padding: 12px 16px;
    border-radius: var(--nb-radius);
    margin: 12px 0;
    font-weight: 600;
}

.nb-citations {
    background: var(--nb-bg-soft);
    border: 1px solid var(--nb-border);
    border-radius: var(--nb-radius-lg);
    padding: 24px 28px;
    margin: 32px 0 24px;
}
.nb-citations-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--nb-text);
    margin: 0 0 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--nb-border);
}
.nb-citations-list {
    list-style: decimal;
    padding-left: 20px;
    margin: 0 0 12px;
}
.nb-citations-item {
    margin: 6px 0;
    font-size: 13px;
    color: var(--nb-text-soft);
    line-height: 1.7;
}
.nb-citations-item a {
    color: var(--nb-primary-700);
    text-decoration: underline;
    word-break: break-all;
}
.nb-citations-meta {
    margin-left: 8px;
    color: var(--nb-text-mute);
    font-size: 12px;
}
.nb-citations-meta span:not(:last-child)::after { content: ' / '; color: var(--nb-border-strong); }
.nb-citations-note {
    font-size: 12px;
    color: var(--nb-text-mute);
    margin: 8px 0 0;
}

.nb-cta-discuss {
    text-align: center;
    margin: 28px 0 8px;
    padding: 20px;
    background: linear-gradient(135deg, var(--nb-accent-soft), #ffffff);
    border: 1px solid #c5e9e3;
    border-radius: var(--nb-radius-lg);
}
.nb-cta-discuss .nb-btn-primary {
    background: var(--nb-accent);
    border-color: var(--nb-accent);
    font-weight: 700;
}
.nb-cta-discuss .nb-btn-primary:hover {
    background: #178074;
}

/* ===== 記事末尾：聖徳太子2.0 への導線 ===== */
.nb-shotoku-promo {
    margin: 36px 0 24px;
    padding: 0;
    border: 1px solid #e5e7eb;
    border-radius: var(--nb-radius-lg);
    background: linear-gradient(145deg, #f5f3ff 0%, #fff 45%, #fff8ed 100%);
    box-shadow: var(--nb-shadow-lg);
}
.nb-shotoku-promo-inner {
    padding: 28px 24px 24px;
}
.nb-shotoku-promo-kicker {
    margin: 0 0 8px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--nb-primary-700);
}
.nb-shotoku-promo-title {
    margin: 0 0 12px;
    font-size: 22px;
    line-height: 1.35;
    color: var(--nb-text);
}
.nb-shotoku-promo-lead {
    margin: 0 0 20px;
    font-size: 15px;
    line-height: 1.65;
    color: var(--nb-text-soft);
}
.nb-shotoku-promo-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}
.nb-shotoku-promo-primary.nb-btn-primary {
    font-weight: 700;
}
@media (max-width: 600px) {
    .nb-shotoku-promo-actions { flex-direction: column; align-items: stretch; }
    .nb-shotoku-promo-actions .nb-btn { width: 100%; text-align: center; }
}

/* ===== Growth Bridge（Social9 ファミリー導線） ===== */
.nb-growth-family {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--dt-border, #e5e7eb);
}
.nb-growth-family-label {
    margin: 0 0 8px;
    font-size: 12px;
    font-weight: 600;
    color: var(--dt-text-muted, #6b7280);
    letter-spacing: 0.02em;
}
.nb-growth-family-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 14px;
    margin: 0;
    padding: 0;
    list-style: none;
}
.nb-growth-family-list a {
    font-size: 13px;
    color: var(--dt-accent, #6366f1);
    text-decoration: none;
}
.nb-growth-family-list a:hover {
    text-decoration: underline;
}

/* ===== ペルソナ一覧ページ ===== */
.nb-personas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
    margin: 24px 0;
}
.nb-persona-card {
    background: #fff;
    border: 1px solid var(--nb-border);
    border-radius: var(--nb-radius-lg);
    padding: 20px;
    box-shadow: var(--nb-shadow);
    transition: box-shadow 0.15s;
}
.nb-persona-card:hover { box-shadow: var(--nb-shadow-lg); }
.nb-persona-card-head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}
.nb-persona-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--nb-primary), var(--nb-accent));
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
}
.nb-persona-name { font-weight: 700; font-size: 16px; color: var(--nb-text); }
.nb-persona-role {
    display: inline-block;
    font-size: 11px;
    background: var(--nb-primary-100);
    color: var(--nb-primary-700);
    padding: 2px 8px;
    border-radius: 999px;
    margin-top: 2px;
}
.nb-persona-bio {
    font-size: 13px;
    color: var(--nb-text-soft);
    line-height: 1.6;
    margin: 6px 0 12px;
}
.nb-persona-topics { display: flex; flex-wrap: wrap; gap: 4px; }
.nb-persona-topic {
    font-size: 11px;
    background: var(--nb-bg-alt);
    color: var(--nb-text-mute);
    padding: 2px 6px;
    border-radius: 4px;
}

/* =====================================================
 * トレンディング深掘り（人気記事 → 関連深掘り記事）
 * ===================================================== */
.nb-parent-link {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    background: linear-gradient(135deg, rgba(124,92,255,0.08), rgba(20,184,166,0.06));
    border: 1px solid rgba(124,92,255,0.25);
    border-radius: 10px;
    padding: 10px 14px;
    margin: 12px 0 18px;
    font-size: 13.5px;
    line-height: 1.6;
    color: var(--nb-text);
}
.nb-parent-link a { color: var(--nb-accent); text-decoration: none; }
.nb-parent-link a:hover { text-decoration: underline; }
.nb-parent-link-mark {
    flex: 0 0 auto;
    font-weight: 700;
    color: var(--nb-accent);
    font-size: 16px;
    line-height: 1;
    padding-top: 2px;
}

.nb-followups {
    background: var(--nb-bg-alt);
    border: 1px solid var(--nb-border);
    border-radius: 12px;
    padding: 18px 20px;
    margin: 16px 0 24px;
}
.nb-followups-title {
    font-size: 16px;
    font-weight: 700;
    margin: 0 0 4px;
    color: var(--nb-text);
}
.nb-followups-note {
    font-size: 12.5px;
    color: var(--nb-text-mute);
    margin: 0 0 14px;
}
.nb-followups-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.nb-followups-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 10px 12px;
    background: #fff;
    border: 1px solid var(--nb-border);
    border-radius: 8px;
    transition: box-shadow 0.15s, transform 0.15s;
}
.nb-followups-item:hover {
    box-shadow: 0 2px 10px rgba(124,92,255,0.10);
    transform: translateY(-1px);
}
.nb-followups-link {
    display: flex;
    gap: 10px;
    align-items: center;
    text-decoration: none;
    color: var(--nb-text);
    font-weight: 600;
    line-height: 1.4;
}
.nb-followups-link:hover { color: var(--nb-accent); }
.nb-followups-depth {
    flex: 0 0 auto;
    font-size: 11px;
    font-weight: 700;
    background: var(--nb-accent);
    color: #fff;
    padding: 2px 8px;
    border-radius: 999px;
    letter-spacing: 0.02em;
}
.nb-followups-text { flex: 1; font-size: 14px; }
.nb-followups-meta {
    margin-top: 4px;
    margin-left: 56px;
    font-size: 11.5px;
    color: var(--nb-text-mute);
}
@media (max-width: 600px) {
    .nb-followups-meta { margin-left: 0; }
}

/* =====================================================
 * 記事一覧上部: トピック検索 + 広報AI提案（nineblog/posts.php #nb-posts-topic）
 * ===================================================== */
.nb-posts-topic-hub {
    margin: 0 0 28px;
    padding: 20px 18px;
    background: var(--nb-bg-alt, #fafafa);
    border: 1px solid #e5e7eb;
    border-radius: 14px;
}
.nb-posts-topic-lead {
    font-size: 14px;
    line-height: 1.65;
    color: var(--nb-text-soft);
    margin: 0 0 14px;
}
.nb-posts-topic-main { display: flex; flex-direction: column; gap: 8px; }
.nb-posts-topic-label {
    font-size: 14px;
    font-weight: 700;
    color: var(--nb-text);
}
.nb-posts-topic-textarea {
    width: 100%;
    box-sizing: border-box;
    min-height: 100px;
    max-height: 220px;
    resize: vertical;
    font-size: 15px;
    padding: 10px 12px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-family: inherit;
    background: #fff;
    color: var(--nb-text);
}
.nb-posts-topic-textarea:focus {
    outline: none;
    border-color: var(--nb-accent);
    box-shadow: 0 0 0 3px rgba(124, 92, 255, 0.15);
}
.nb-posts-topic-hint {
    font-size: 12px;
    color: var(--nb-text-mute);
    margin: 0;
}
.nb-posts-topic-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-top: 6px;
}
.nb-posts-topic-form-inline { display: inline; margin: 0; }
.nb-posts-topic-details { margin-top: 10px; font-size: 13px; color: var(--nb-text-soft); }
.nb-posts-topic-details summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--nb-text);
}
.nb-posts-topic-options {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 420px;
}
.nb-posts-topic-input {
    width: 100%;
    box-sizing: border-box;
    font-size: 14px;
    padding: 8px 10px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-family: inherit;
    background: #fff;
}
.nb-posts-topic-note { font-size: 12px; color: var(--nb-text-mute); margin: 0; }

.nb-suggest-flash {
    padding: 12px 14px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    line-height: 1.55;
}
.nb-suggest-flash--ok {
    background: rgba(20, 184, 166, 0.12);
    border: 1px solid rgba(20, 184, 166, 0.35);
    color: var(--nb-text);
}
.nb-suggest-flash--err {
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.35);
    color: var(--nb-text);
}
.nb-suggest-hp {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* ===== トピックガイド（guides.php） ===== */
.nb-guides-cat-block {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--nb-border);
}
.nb-guides-cat-title { font-size: 1.35rem; margin: 0 0 0.5rem; }
.nb-guides-cat-title a { color: inherit; text-decoration: none; }
.nb-guides-cat-title a:hover { text-decoration: underline; }
.nb-guides-cat-count { font-size: 0.9rem; color: var(--nb-text-mute); font-weight: normal; }
.nb-guides-cat-lead { margin: 0 0 1rem; color: var(--nb-text-soft); line-height: 1.6; }
.nb-guides-post-list { margin: 0; padding-left: 1.25rem; line-height: 1.75; }
.nb-guides-post-meta { color: var(--nb-text-mute); font-size: 0.85rem; margin-left: 0.5rem; }
.nb-guides-more { margin: 0.75rem 0 0; }
.nb-muted { color: var(--nb-text-mute); }

/* ===== 狭い携帯（320〜480px）向け最終調整 ===== */
@media (max-width: 480px) {
    .nb-container { padding: 0 16px; }
    .nb-hero-actions .nb-btn { width: 100%; justify-content: center; }
    .nb-footer { padding: 40px 0 24px; margin-top: 56px; }
    .nb-footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .nb-posts-topic-hub { padding: 16px 14px; }
    .nb-posts-topic-actions { flex-direction: column; align-items: stretch; }
    .nb-posts-topic-actions .nb-btn { width: 100%; justify-content: center; }
    .nb-header-cta { flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
    .nb-header-cta .nb-btn-primary { flex: 1 1 auto; min-width: 0; justify-content: center; }
    .nb-index-search-row { flex-direction: column; }
    .nb-index-search-btn { width: 100%; justify-content: center; }
}

/* ===== Index（トップ = 記事一覧のみ） ===== */
.nb-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}
.nb-index-main {
    padding-top: 28px;
    padding-bottom: 48px;
}

/* ===== Index 検索・ジャンル ===== */
.nb-index-toolbar {
    margin-bottom: 28px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.nb-index-search-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--nb-text-soft);
    margin-bottom: 8px;
}
.nb-index-search-row {
    display: flex;
    gap: 10px;
    align-items: stretch;
}
.nb-index-search-input {
    flex: 1 1 auto;
    min-width: 0;
    padding: 12px 14px;
    font-size: 15px;
    border: 1px solid var(--nb-border);
    border-radius: var(--nb-radius-sm, 10px);
    background: var(--nb-bg);
    color: var(--nb-text);
    transition: border-color var(--nb-transition, 0.18s ease), box-shadow var(--nb-transition, 0.18s ease);
}
.nb-index-search-input:focus {
    outline: none;
    border-color: var(--nb-primary, #6366f1);
    box-shadow: var(--nb-shadow-focus, 0 0 0 3px rgba(99, 102, 241, 0.18));
}
.nb-index-search-btn {
    flex: 0 0 auto;
    white-space: nowrap;
}
.nb-index-genre-nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
}
.nb-index-genre-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
    margin: 0;
    padding: 0;
}
.nb-index-genre-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    font-size: 14px;
    font-weight: 600;
    color: var(--nb-text-soft);
    background: var(--nb-bg-soft);
    border: 1px solid var(--nb-border);
    border-radius: 999px;
    text-decoration: none;
    transition: background var(--nb-transition, 0.18s ease), border-color var(--nb-transition, 0.18s ease), color var(--nb-transition, 0.18s ease);
}
.nb-index-genre-btn:hover {
    background: var(--nb-accent-soft, #eef2ff);
    border-color: var(--nb-accent-border, rgba(99, 102, 241, 0.35));
    color: var(--nb-primary-700, #4338ca);
}
.nb-index-genre-btn--active {
    background: var(--nb-accent-soft, #eef2ff);
    border-color: var(--nb-primary, #6366f1);
    color: var(--nb-primary-700, #4338ca);
}
.nb-index-genre-count {
    font-size: 12px;
    font-weight: 500;
    color: var(--nb-text-mute);
    background: var(--nb-bg);
    border-radius: 999px;
    padding: 1px 7px;
    min-width: 1.5em;
    text-align: center;
}
.nb-index-genre-btn--active .nb-index-genre-count {
    color: var(--nb-primary-700, #4338ca);
}
.nb-index-filter-status {
    margin: 0;
    font-size: 14px;
    color: var(--nb-text-soft);
}

/* 日本の生活シリーズ（海外読者向けハイライト） */
.nb-index-japan-life {
    margin: 0 0 32px;
    padding: 24px 20px;
    border: 1px solid var(--nb-border, #e5e7eb);
    border-radius: var(--nb-radius, 12px);
    background: linear-gradient(135deg, rgba(238, 242, 255, 0.55) 0%, rgba(255, 255, 255, 0.95) 100%);
    box-shadow: var(--nb-shadow-sm, 0 2px 8px rgba(16, 24, 40, 0.04));
}
.nb-index-japan-life-head {
    margin-bottom: 20px;
}
.nb-index-japan-life-eyebrow {
    margin: 0 0 6px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--nb-primary, #6366f1);
}
.nb-index-japan-life-title {
    margin: 0 0 8px;
    font-size: clamp(20px, 3vw, 24px);
    font-weight: 700;
    color: var(--nb-text, #111827);
}
.nb-index-japan-life-lead {
    margin: 0;
    font-size: 14px;
    line-height: 1.65;
    color: var(--nb-text-soft, #4b5563);
    max-width: 62ch;
}
.nb-index-japan-life-grid {
    margin-bottom: 16px;
}
.nb-index-japan-life-more-wrap {
    margin: 0;
    text-align: center;
}
@media (max-width: 768px) {
    .nb-index-japan-life {
        padding: 18px 14px;
    }
}