/* ============================================
   Design Tokens
============================================ */
:root {
    /* Colors */
    --color-green: #2C5F3F;

    /* Enwit Green */
    --color-green-light: #D9E5DC;

    /* 薄緑 */
    --color-burgundy: #8B1A3D;

    /* Burgundy(中央六角形) */
    --color-brown: #8B7355;

    /* Earth Brown */
    --color-cream: #F5F0E1;

    /* 紙の色 */
    --color-text: #2C2C2C;
    --color-text-soft: #555555;
    --color-text-mute: #888888;
    --color-line: #DDDDDD;
    --color-bg: #FFFFFF;
    --color-bg-soft: #FAF8F3;
    --color-bg-section: #F5F2EC;

    /* Typography */
    --font-serif: 'Noto Serif JP', '游明朝', YuMincho, serif;
    --font-sans: 'Noto Sans JP', '游ゴシック', YuGothic, sans-serif;

    /* Spacing */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 40px;
    --space-xl: 64px;
    --space-2xl: 96px;
    --space-3xl: 128px;

    /* Container */
    --container-max: 1080px;
    --container-narrow: 880px;
    --paper: #f3efe4;
    --paper2: #efe9da;
    --ink: #23231f;
    --ink-soft: #5b594f;
    --green: #2c4636;
    --green-soft: #5a7363;
    --rule: #c8c0ac;
    --rule-soft: #ddd6c4;
    --root-bg: #ece4d2;
    --dark-green: #2c4636;

    /* .hook の背景 */
}

/* ============================================
   Reset & Base
============================================ */
* {
    box-sizing: border-box;
    margin: 0 auto;
    padding: 0;
}

/* ============================================
   6D戦略中核ページ - スタイルシート
   Pinegrow Web Editor 用
   
   デザイン基盤:
   - 書籍カバーと統一されたタイポグラフィ・色
   - Enwit Green / Burgundy / Earth Brown を基調
   - 自然界モチーフを尊重した余白設計
============================================ */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background: var(--paper);
    color: var(--ink);
}

body.page-6d-strategy {
    font-family: var(--font-sans);
    color: var(--color-text);
    line-height: 1.8;
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
    transition: opacity 0.2s, color 0.2s;
}

a:hover {
    opacity: 0.75;
}

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

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ============================================
   Site Header
============================================ */
.site-header {
    background-color: var(--color-green);
    color: var(--color-bg);
    padding: var(--space-sm) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.header-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

.brand-link {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-name {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.brand-sub {
    font-size: 0.7rem;
    opacity: 0.8;
    letter-spacing: 0.1em;
}

.header-nav {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.header-nav a {
    font-size: 0.9rem;
    font-weight: 500;
}

/* ============================================
   Hero
============================================ */
.hero {
    background-color: var(--color-cream);
    background-image: linear-gradient(135deg, rgba(217, 229, 220, 0.3) 0%, transparent 100%);
    padding: var(--space-3xl) 0;
    border-bottom: 1px solid var(--color-line);
    grid-area: 2 / 1 / 3 / 2;
    max-width: 100%;
}

.hero-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: grid;
    grid-template-columns: 1.2fr 1.2fr;
    align-items: center;
}

.hero-inner > * {
    min-width: 0;
}

.hero-hexagon {
    display: block;
    width: 100%;
    max-width: 480px;
    height: auto;
    margin: 0 auto;
}

.hero-tagline {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--color-brown);
    letter-spacing: 0.08em;
    margin-bottom: var(--space-sm);
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 5rem;
    font-weight: 700;
    color: var(--color-green);
    line-height: 1;
    letter-spacing: 0.02em;
    margin-bottom: var(--space-sm);
}

.hero-subtitle {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    letter-spacing: 0.04em;
}

.hero-lead {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--color-text-soft);
    margin-bottom: var(--space-lg);
}

.hero-cta {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

@media (min-width:600px) and (max-width:899px) {
    .hero-visual {
        max-width: 80%;
        display: flex;
        justify-content: center;
        align-items: center;
    }
}

/* ============================================
   Buttons
============================================ */
.btn {
    display: inline-block;
    padding: 14px 28px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    border-radius: 4px;
    transition: all 0.2s;
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--color-green);
    color: white;
    border-color: var(--color-green);
}

.btn-primary:hover {
    background-color: var(--color-burgundy);
    border-color: var(--color-burgundy);
    opacity: 1;
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-green);
    border-color: var(--color-green);
}

.btn-secondary:hover {
    background-color: var(--color-green);
    color: white;
    opacity: 1;
}

/* ============================================
   Section Common
============================================ */
.section-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-green);
    text-align: center;
    letter-spacing: 0.04em;
    line-height: 1.4;
    margin-bottom: var(--space-md);
}

.section-title .section-prefix {
    display: block;
    margin-bottom: var(--space-sm);
}

.section-prefix {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: var(--color-brown);
    text-align: center;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
    font-weight: 400;
}

.section-lead {
    font-size: 1rem;
    text-align: center;
    color: var(--color-text-soft);
    max-width: 700px;
    margin: 0 auto var(--space-xl);
    line-height: 1.9;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

/* ============================================
   Intro
============================================ */
.intro {
    padding: var(--space-2xl) 0;
    background-color: var(--color-bg);
}

.intro-content {
    max-width: var(--container-narrow);
    margin: 0 auto;
}

.lead-text {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--color-green);
    text-align: center;
    margin-bottom: var(--space-lg);
    line-height: 1.7;
    letter-spacing: 0.04em;
}

.intro-content p {
    font-size: 1rem;
    line-height: 2;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

/* ============================================
   Negative Spiral
============================================ */
.negative-spiral {
    padding: var(--space-2xl) 0;
    background-color: var(--color-bg-section);
}

.spiral-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.spiral-item {
    background-color: var(--color-bg);
    padding: var(--space-md);
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    border-left: 4px solid var(--color-burgundy);
}

.spiral-icon {
    width: 28px;
    height: 28px;
    background-color: var(--color-green);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    font-weight: 700;
    flex-shrink: 0;
}

.spiral-item p {
    font-size: 0.95rem;
    font-weight: 500;
}

.spiral-statement {
    text-align: center;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-green);
    font-weight: 500;
    letter-spacing: 0.06em;
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--color-line);
    margin-top: var(--space-lg);
}

/* ============================================
   Framework (6D)
============================================ */
.framework {
    padding: var(--space-3xl) 0 var(--space-xl);
    background-color: var(--color-bg);
}

.framework-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.hexagon-area {
    display: flex;
    justify-content: center;
    margin: var(--space-xl) 0 var(--space-2xl);
}

.hexagon-image {
    max-width: 700px;
    width: 100%;
}

.d-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    max-width: var(--container-narrow);
    margin: 0 auto;
}

.d-card {
    background-color: var(--color-bg-soft);
    padding: var(--space-lg);
    border-radius: 8px;
    border-top: 4px solid var(--color-green);
    transition: transform 0.2s, box-shadow 0.2s;
}

.d-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(44, 95, 63, 0.08);
}

.d-card-header {
    display: flex;
    align-items: baseline;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.d-letter {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-burgundy);
    line-height: 1;
}

.d-name {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    color: var(--color-green);
    font-weight: 700;
}

.d-jp {
    font-size: 0.9rem;
    color: var(--color-brown);
    letter-spacing: 0.1em;
}

.d-desc {
    font-size: 0.95rem;
    line-height: 1.9;
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

.d-link {
    color: var(--color-green);
    font-size: 0.9rem;
    font-weight: 500;
    border-bottom: 1px solid var(--color-green);
    padding-bottom: 2px;
}

/* ============================================
   3+1 Views
============================================ */
.three-plus-one {
    padding: var(--space-3xl) 0 var(--space-xl);
    background-color: var(--color-bg-section);
}

.view-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    max-width: var(--container-narrow);
    margin: 0 auto;
}

.view-item {
    text-align: center;
    padding: var(--space-md);
}

.view-item img {
    width: 100%;
    max-width: 160px;
    margin: 0 auto var(--space-md);
}

.view-icon {
    width: 100px;
    height: 100px;
    background-color: var(--color-bg);
    border: 2px solid var(--color-green);
    border-radius: 50%;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: var(--color-green);
}

.view-bird::before {
    content: "鳥";
    font-size: 2rem;
}

.view-insect::before {
    content: "虫";
    font-size: 2rem;
}

.view-fish::before {
    content: "魚";
    font-size: 2rem;
}

.view-dormouse::before {
    content: "?";
    font-size: 2.5rem;
    font-weight: 700;
}

.view-name {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: var(--color-green);
    margin-bottom: var(--space-sm);
    font-weight: 700;
}

.view-desc {
    font-size: 0.9rem;
    color: var(--color-text-soft);
}

.view-special .view-icon {
    border-style: dashed;
    border-color: var(--color-burgundy);
    color: var(--color-burgundy);
}

.view-special .view-name {
    color: var(--color-burgundy);
}

.view-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-mute);
    margin-top: 4px;
}

/* ============================================
   Concepts
============================================ */
.concepts {
    padding: var(--space-3xl) 0 var(--space-xl);
    background-color: var(--color-bg);
}

.concept-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.concept-card {
    background-color: var(--color-bg-soft);
    padding: var(--space-md);
    border-radius: 6px;
    border-left: 3px solid var(--color-green);
}

.concept-name {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--color-green);
    font-weight: 700;
    margin-bottom: 4px;
}

.concept-reading {
    font-size: 0.85rem;
    color: var(--color-text-mute);
    font-weight: 400;
}

.concept-d {
    font-size: 0.8rem;
    color: var(--color-brown);
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
    font-weight: 500;
}

.concept-desc {
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--color-text);
}

.concept-note {
    text-align: center;
    font-size: 0.95rem;
    color: var(--color-text-soft);
    max-width: 720px;
    margin: 0 auto;
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-line);
}

/* ============================================
   Evidence (Tags)
============================================ */
.evidence {
    padding: var(--space-3xl) 0 0 ;
    background: linear-gradient(180deg, var(--color-bg-section) 0%, var(--color-bg) 100%);
}

/* デスクトップ：画像を見せ、evidence-tags を隠す */
.evidence-tags {
    display: none;
}

/* ============================================
   Official Book
============================================ */
.official-book {
    padding: var(--space-3xl) 0;
    background-color: var(--color-bg-section);
}

.book-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: var(--space-2xl);
    align-items: center;
    max-width: var(--container-narrow);
    margin: 0 auto;
}

.book-cover-area {
    text-align: center;
}

.book-cover {
    max-width: 280px;
    margin: 0 auto;
    box-shadow: 0 12px 32px rgba(0,0,0,0.15);
}

.book-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--color-green);
    font-weight: 700;
    line-height: 1.4;
    margin: var(--space-sm) 0;
}

.book-subtitle {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--color-brown);
    margin-bottom: var(--space-sm);
}

.book-author {
    font-size: 0.9rem;
    color: var(--color-text-soft);
    margin-bottom: var(--space-md);
}

.book-desc {
    font-size: 0.95rem;
    line-height: 1.9;
    margin-bottom: var(--space-md);
}

.book-meta {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.meta-item {
    display: inline-block;
    padding: 4px 12px;
    background-color: white;
    color: var(--color-green);
    font-size: 0.85rem;
    border: 1px solid var(--color-green);
    border-radius: 4px;
}

.book-cta {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

/* ============================================
   Citation
============================================ */
.citation {
    padding: var(--space-2xl) 0;
    background-color: var(--color-bg);
}

.citation-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    max-width: var(--container-narrow);
    margin: 0 auto;
}

.citation-block {
    background-color: var(--color-bg-soft);
    padding: var(--space-lg);
    border-radius: 6px;
    border-top: 3px solid var(--color-brown);
}

.citation-block h3 {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: var(--color-green);
    margin-bottom: var(--space-sm);
    font-weight: 700;
}

.citation-format {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.7;
    padding: var(--space-sm) 0;
}

.citation-en {
    font-size: 0.9rem;
    color: var(--color-text-soft);
    line-height: 1.7;
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px dashed var(--color-line);
}

.citation-note {
    font-size: 0.85rem;
    color: var(--color-text-soft);
    margin-top: var(--space-sm);
}

/* ============================================
   Final CTA
============================================ */
.final-cta {
    padding: var(--space-3xl) 0;
    background: linear-gradient(135deg, var(--color-green) 0%, #1f4530 100%);
    color: white;
}

.cta-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: var(--space-xl);
    font-weight: 700;
    letter-spacing: 0.04em;
}

.cta-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    max-width: var(--container-narrow);
    margin: 1rem auto;
}

.cta-card {
    background-color: rgba(255,255,255,0.08);
    padding: var(--space-lg);
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.2);
    position: relative;
    transition: background-color 0.2s, transform 0.2s;
}

.cta-card:hover {
    background-color: rgba(255,255,255,0.15);
    transform: translateY(-2px);
    opacity: 1;
}

.cta-card h3 {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    margin-bottom: var(--space-sm);
    letter-spacing: 0.04em;
}

.cta-card p {
    font-size: 0.9rem;
    line-height: 1.8;
    opacity: 0.9;
}

.cta-arrow {
    position: absolute;
    bottom: var(--space-md);
    right: var(--space-md);
    font-size: 1.5rem;
}

/* ============================================
   Site Footer
============================================ */
.site-footer {
    background-color: #464444;
    color: #cccccc;
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-2xl);
    color: #204832;
    background-color: transparent;
}

.footer-publisher {
    font-size: 0.8rem;
    color: var(--color-text-mute);
    letter-spacing: 0.1em;
    margin-bottom: 4px;
}

.footer-name {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: white;
    margin-bottom: var(--space-md);
}

.footer-copyright {
    font-size: 0.75rem;
    color: var(--color-text-mute);
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.footer-col h4 {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    color: var(--color-green-light);
    margin-bottom: var(--space-sm);
    font-weight: 700;
}

.footer-col a {
    display: block;
    font-size: 0.85rem;
    margin-bottom: var(--space-xs);
    color: #aaaaaa;
}

/* =====================
   バイオミミクリー接続ブロック
   ===================== */
.biomimicry-link {
    padding: var(--space-xl) 0;
    background: var(--color-bg-section);
    border-top: 1px solid var(--color-line);
    border-bottom: 1px solid var(--color-line);
}

.biomimicry-link__inner {
    max-width: var(--container-narrow);
    margin: 0 auto;
    border-left: 3px solid var(--color-green);
    padding-left: var(--space-lg);
}

.biomimicry-link__body {
    color: var(--color-text);
    line-height: var(--line-height-body);
    margin-top: var(--space-sm);
    margin-bottom: var(--space-md);
}

.biomimicry-link__more {
    display: inline-block;
    font-family: var(--font-serif);
    color: var(--color-green);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    letter-spacing: 0.04em;
}

.biomimicry-link__more:hover {
    text-decoration: underline;
}

.section-divider {
    background-color: white;
    height: 2rem;
}

@media (max-width: 600px) {
    .biomimicry-link__inner {
        padding-left: var(--space-md);
    }
}

/* ============================================
   Responsive
============================================ */
@media (max-width: 900px) {
    .hero-inner {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        text-align: center;
        display: grid;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-title {
        font-size: 4rem;
    }

    .d-grid {
        grid-template-columns: 1fr;
    }

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

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

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

    .book-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .citation-grid {
        grid-template-columns: 1fr;
    }

    .cta-grid {
        grid-template-columns: 1fr;
    }

    .cta-grid .cta-card[style*="grid-column"] {
        grid-column: span 1;
    }

    .footer-inner {
        grid-template-columns: 1fr;
    }

    .evidence {
        padding: var(--space-3xl) 0 0 !important;
    }

    @media (max-width: 900px) {
        section.evidence img {
            display: none;
        }

        .evidence-tags {
            display: flex;
            max-width: var(--container-narrow);
            margin: 0 auto 0;
            display: flex;
            flex-direction: column;
            gap: var(--space-md);
        }
    }

    .tag-group {
        display: flex;
        flex-wrap: wrap;
        gap: var(--space-sm);
        align-items: center;
        padding: var(--space-md);
        background-color: var(--color-bg);
        border-radius: 6px;
    }

    .tag-label {
        font-family: var(--font-serif);
        font-size: 0.85rem;
        color: var(--color-green);
        font-weight: 700;
        letter-spacing: 0.1em;
        min-width: 100px;
        border-right: 2px solid var(--color-green);
        padding-right: var(--space-sm);
        margin-right: var(--space-sm);
    }

    .tag {
        display: inline-block;
        padding: 4px 12px;
        background-color: var(--color-green-light);
        color: var(--color-green);
        font-size: 0.8rem;
        border-radius: 12px;
        letter-spacing: 0.04em;
    }

    .evidence-link {
        display: block;
        text-align: center;
        font-size: 1rem;
        color: var(--color-green);
        font-weight: 500;
    }
}

@media (max-width: 600px) {
    .header-nav {
        display: none;
    }

    .hero-title {
        font-size: 3rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .concept-grid,
    .spiral-grid,
    .view-grid {
        grid-template-columns: 1fr;
    }
}

/* ---- section header ---- */
.eyebrow {
    text-align: center;
    color: var(--green-soft);
    font-family: "Cormorant Garamond",serif;
    font-style: italic;
    font-size: 18px;
    letter-spacing: .04em;
    margin-bottom: 10px;
}

.eyebrow .jp {
    font-family: "Noto Serif JP",serif;
    font-style: normal;
    font-size: 13px;
    letter-spacing: .25em;
    display: block;
    margin-top: 4px;
    color: var(--ink-soft);
}

h2.title {
    text-align: center;
    font-family: "Noto Serif JP",serif;
    font-weight: 600;
    font-size: clamp(30px,5vw,44px);
    letter-spacing: .06em;
    color: var(--ink);
    position: relative;
    padding-bottom: 18px;
    margin-bottom: 18px;
}

h2.title::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 54px;
    height: 1px;
    background: var(--green);
}

.lead {
    text-align: center;
    max-width: 620px;
    margin: 0 auto 8px;
    color: var(--ink-soft);
    font-size: 15.5px;
    line-height: 2;
}

.lead b {
    color: var(--green);
    font-weight: 500;
}

/* ---- pair groups ---- */
.pair {
    margin-top: 56px;
}

.pair-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-bottom: 20px;
    width: fit-content;
    margin-inline: auto;
}

.pair-label::before,
.pair-label::after {
    content: "";
    height: 1px;
    width: 46px;
    background: var(--rule);
}

.pair-label span {
    font-family: "Noto Serif JP",serif;
    font-size: 13px;
    letter-spacing: .32em;
    color: var(--green-soft);
}

.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
}

@media (max-width:680px){
    .row {
        grid-template-columns: 1fr;
        gap: 18px;
    }
}

/* ---- specimen card ---- */
.card {
    position: relative;
    background: linear-gradient(180deg,#fbf9f3,#f6f2e7);
    border: 1px solid var(--rule);
    padding: 30px 30px 28px;
    opacity: 0;
    transform: translateY(14px);
    animation: rise .7s cubic-bezier(.2,.7,.2,1) forwards;
}

@keyframes rise{
    to {
        opacity: 1;
        transform: none;
    }
}

/* corner ticks */
.card::before,
.card::after {
    content: "";
    position: absolute;
    width: 12px;
    height: 12px;
    border: 1px solid var(--green);
    opacity: .5;
}

.card::before {
    top: 7px;
    left: 7px;
    border-right: none;
    border-bottom: none;
}

.card::after {
    bottom: 7px;
    right: 7px;
    border-left: none;
    border-top: none;
}

.card-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}

.axis-en {
    font-family: "Cormorant Garamond",serif;
    font-weight: 600;
    font-size: 13px;
    letter-spacing: .34em;
    text-transform: uppercase;
    color: var(--green);
}

.axis-jp {
    font-family: "Noto Serif JP",serif;
    font-weight: 600;
    font-size: 21px;
    letter-spacing: .08em;
    margin-top: 3px;
    color: var(--ink);
}

.logo {
    flex: 0 0 auto;
    height: 46px;
    width: auto;
    max-width: 150px;
    object-fit: contain;
    object-position: right center;
    filter: grayscale(1) contrast(1.05);
    opacity: .9;
}

.logo.sq {
    max-width: 46px;
}

.think {
    font-size: 14.5px;
    line-height: 2.05;
    color: var(--ink-soft);
}

div.think {
    min-height: 6rem;
}

.think .em {
    color: var(--green);
    font-weight: 400;
}

.cardfoot {
    margin-top: 18px;
    padding-top: 13px;
    border-top: 1px dotted var(--rule);
    display: flex;
    align-items: baseline;
    gap: 10px;
}

.concept {
    font-family: "Cormorant Garamond",serif;
    font-weight: 600;
    font-size: 17px;
    letter-spacing: .02em;
    color: var(--ink);
}

.reading {
    font-size: 10.5px;
    letter-spacing: .18em;
    color: var(--green-soft);
}

/* stagger */
.row .card:nth-child(2) {
    animation-delay: .09s;
}

.pair:nth-child(3) .card {
    animation-delay: .05s;
}

.pair:nth-child(4) .card {
    animation-delay: .1s;
}

/* ---- closing hook ---- */
.hook {
    margin-top: 64px;
    text-align: center;
    border: 1px solid var(--rule);
    color: #eef2ec;
    padding: 30px 26px;
    background: var(--dark-green);
}

.hook .k {
    font-family: "Cormorant Garamond",serif;
    font-style: italic;
    font-size: 16px;
    letter-spacing: .05em;
    color: #bcd2c4;
    display: block;
    margin-bottom: 10px;
}

.hook p {
    font-size: 14.5px;
    line-height: 2;
    color: #e7ede8;
}

.hook .book {
    font-family: "Noto Serif JP",serif;
    font-weight: 500;
    color: #fff;
}

.note {
    max-width: 760px;
    margin: 40px auto 0;
    text-align: center;
    font-size: 11.5px;
    line-height: 1.9;
    color: #9a9484;
    border-top: 1px solid var(--rule-soft);
    padding-top: 18px;
}

/* Amazon CTA button (#book-view) */
.btn--secondary {
    background-color: transparent;
    color: var(--color-green);
    border-color: var(--color-green);
}

.btn--secondary:hover {
    background-color: var(--color-green);
    color: white;
    opacity: 1;
}

.btn--amazon {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn--amazon .icon-amazon {
    width: 1.1em;
    height: 1.1em;
}