.concepts-index[data-astro-cid-6vdlxo5s]{background:var(--c-bg, #FAFAF7)}.concepts-hero[data-astro-cid-6vdlxo5s]{padding:72px 32px 16px;background:linear-gradient(180deg,var(--c-bg-2, #F4F0E8) 0%,var(--c-bg, #FAFAF7) 100%);border-bottom:1px solid var(--c-border, #D8D3C8)}.concepts-hero-inner[data-astro-cid-6vdlxo5s]{max-width:1200px;margin:0 auto}.concepts-eyebrow[data-astro-cid-6vdlxo5s]{font-family:var(--font-mono);font-size:var(--fs-xs);font-weight:500;letter-spacing:.18em;color:var(--c-navy, #1A2B5C);margin:0 0 12px}.concepts-h1[data-astro-cid-6vdlxo5s]{font-family:var(--font-serif-jp);font-size:var(--fs-2xl);font-weight:600;line-height:var(--lh-tight);color:var(--c-ink, #2b2a27);margin:0 0 16px}.concepts-intro[data-astro-cid-6vdlxo5s]{font-size:var(--fs-sm);line-height:var(--lh-relaxed);color:var(--c-ink-2, #45423c);margin:0;max-width:600px}.concepts-container[data-astro-cid-6vdlxo5s]{max-width:1200px;margin:0 auto;padding:24px 32px 80px;display:grid;grid-template-columns:1fr 300px;gap:48px}.concepts-main[data-astro-cid-6vdlxo5s]{min-width:0}.concepts-search[data-astro-cid-6vdlxo5s]{margin-bottom:20px}#search-box[data-astro-cid-6vdlxo5s]{--pagefind-ui-scale: 1;--pagefind-ui-primary: var(--c-navy, #1A2B5C);--pagefind-ui-text: var(--c-ink, #2b2a27);--pagefind-ui-background: #fff;--pagefind-ui-border: var(--c-border, #D8D3C8);--pagefind-ui-border-width: 1px;--pagefind-ui-border-radius: 0;--pagefind-ui-font: var(--font-sans-jp)}.search-unavailable[data-astro-cid-6vdlxo5s]{font-size:var(--fs-sm);color:var(--c-muted, #6B6760);padding:12px 16px;background:var(--c-bg-2, #F4F0E8);border:1px solid var(--c-border, #D8D3C8)}.concepts-section-title[data-astro-cid-6vdlxo5s]{font-family:var(--font-serif-jp);font-size:var(--fs-lg);font-weight:600;color:var(--c-ink, #2b2a27);margin:0 0 16px;display:flex;align-items:center;gap:10px}.concepts-theme-dot[data-astro-cid-6vdlxo5s]{width:12px;height:12px;border-radius:50%;flex-shrink:0}.concepts-theme-count[data-astro-cid-6vdlxo5s]{font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--c-muted, #6B6760);font-weight:400}.concepts-theme-header[data-astro-cid-6vdlxo5s]{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.concepts-theme-header[data-astro-cid-6vdlxo5s] .concepts-section-title[data-astro-cid-6vdlxo5s]{margin-bottom:0}.concepts-see-all[data-astro-cid-6vdlxo5s]{font-size:var(--fs-sm);font-weight:500;color:var(--c-navy, #1A2B5C);text-decoration:none;transition:opacity .2s}.concepts-see-all[data-astro-cid-6vdlxo5s]:hover{opacity:.7}.concepts-latest[data-astro-cid-6vdlxo5s]{margin-bottom:48px}.concepts-latest[data-astro-cid-6vdlxo5s] .concept-card-summary[data-astro-cid-6vdlxo5s]{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.6;max-height:3.2em}.concepts-theme-section[data-astro-cid-6vdlxo5s]{margin-bottom:56px;padding-top:32px;border-top:1px solid var(--c-border, #D8D3C8)}.concepts-cards[data-astro-cid-6vdlxo5s]{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.concepts-cards--4col[data-astro-cid-6vdlxo5s]{grid-template-columns:repeat(4,1fr)}.concept-card[data-astro-cid-6vdlxo5s]{min-width:0}.concept-card-link[data-astro-cid-6vdlxo5s]{display:flex;flex-direction:column;gap:8px;text-decoration:none;height:100%;background:#fff;border:1px solid var(--c-border, #D8D3C8);transition:box-shadow .2s,border-color .2s}.concept-card-link[data-astro-cid-6vdlxo5s]:hover{box-shadow:0 8px 24px #1a2b5c14;border-color:var(--c-navy, #1A2B5C)}.concept-card-thumb[data-astro-cid-6vdlxo5s]{display:block;aspect-ratio:16 / 7;overflow:hidden;background:var(--theme-tint, #F4F0E8)}.concept-card-thumb[data-astro-cid-6vdlxo5s] img[data-astro-cid-6vdlxo5s]{display:block;width:100%;height:100%;object-fit:cover}.concept-card-meta[data-astro-cid-6vdlxo5s]{display:flex;align-items:center;gap:6px;padding:0 12px;flex-wrap:wrap}.concept-card-theme[data-astro-cid-6vdlxo5s]{font-size:var(--fs-xs);font-weight:600;padding:3px 8px;background:var(--theme-color, #1A2B5C);color:var(--theme-ink, #fff)}.concept-card-date[data-astro-cid-6vdlxo5s]{font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--c-muted, #6B6760)}.concept-card-new[data-astro-cid-6vdlxo5s]{font-family:var(--font-mono);font-size:var(--fs-xs);font-weight:700;color:#e53e3e;background:#fed7d7;padding:2px 6px}.concept-card-title[data-astro-cid-6vdlxo5s]{font-family:var(--font-serif-jp);font-size:var(--fs-md);font-weight:600;line-height:1.5;color:var(--c-ink, #2b2a27);margin:0;padding:0 12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.concepts-latest[data-astro-cid-6vdlxo5s] .concept-card-title[data-astro-cid-6vdlxo5s]{padding-bottom:0}.concept-card-summary[data-astro-cid-6vdlxo5s]{font-size:var(--fs-sm);line-height:1.6;color:var(--c-ink-2, #45423c);margin:0;padding:0 12px 12px;flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;max-height:3.2em}.concept-card--small[data-astro-cid-6vdlxo5s] .concept-card-title[data-astro-cid-6vdlxo5s]{font-size:var(--fs-sm)}.concept-card--small[data-astro-cid-6vdlxo5s] .concept-card-summary[data-astro-cid-6vdlxo5s]{font-size:var(--fs-xs)}.concepts-sidebar[data-astro-cid-6vdlxo5s]{position:sticky;top:100px;align-self:start;display:flex;flex-direction:column;gap:32px}.sidebar-section[data-astro-cid-6vdlxo5s]{background:#fff;border:1px solid var(--c-border, #D8D3C8);padding:20px}.sidebar-title[data-astro-cid-6vdlxo5s]{font-family:var(--font-serif-jp);font-size:var(--fs-sm);font-weight:600;color:var(--c-ink, #2b2a27);margin:0 0 16px;padding-bottom:12px;border-bottom:1px solid var(--c-border, #D8D3C8)}.sidebar-themes[data-astro-cid-6vdlxo5s]{list-style:none;padding:0;margin:0}.sidebar-theme-link[data-astro-cid-6vdlxo5s]{display:flex;align-items:center;gap:10px;padding:8px 0;text-decoration:none;color:var(--c-ink, #2b2a27);font-size:var(--fs-sm);transition:color .2s;border-bottom:1px solid rgba(216,211,200,.5)}.sidebar-theme-link[data-astro-cid-6vdlxo5s]:last-child{border-bottom:0}.sidebar-theme-link[data-astro-cid-6vdlxo5s]:hover{color:var(--c-navy, #1A2B5C)}.sidebar-theme-dot[data-astro-cid-6vdlxo5s]{width:10px;height:10px;border-radius:50%;flex-shrink:0}.sidebar-theme-label[data-astro-cid-6vdlxo5s]{flex:1}.sidebar-theme-count[data-astro-cid-6vdlxo5s]{font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--c-muted, #6B6760)}.sidebar-popular[data-astro-cid-6vdlxo5s]{list-style:none;padding:0;margin:0}.sidebar-popular-link[data-astro-cid-6vdlxo5s]{display:flex;align-items:flex-start;gap:10px;padding:8px 0;text-decoration:none;color:var(--c-ink, #2b2a27);font-size:var(--fs-xs);line-height:1.5;transition:color .2s;border-bottom:1px solid rgba(216,211,200,.5)}.sidebar-popular-link[data-astro-cid-6vdlxo5s]:last-child{border-bottom:0}.sidebar-popular-link[data-astro-cid-6vdlxo5s]:hover{color:var(--c-navy, #1A2B5C)}.sidebar-popular-rank[data-astro-cid-6vdlxo5s]{font-family:var(--font-mono);font-size:var(--fs-xs);font-weight:700;color:var(--c-navy, #1A2B5C);background:var(--c-bg-2, #F4F0E8);width:22px;height:22px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.sidebar-popular-title[data-astro-cid-6vdlxo5s]{flex:1}.sidebar-cta[data-astro-cid-6vdlxo5s]{background:var(--c-navy, #1A2B5C);text-align:center}.sidebar-cta-text[data-astro-cid-6vdlxo5s]{font-size:var(--fs-sm);color:#fff;margin:0 0 16px;line-height:var(--lh-normal)}.sidebar-cta-button[data-astro-cid-6vdlxo5s]{display:block;padding:12px;background:#fff;color:var(--c-navy, #1A2B5C);font-size:var(--fs-sm);font-weight:600;text-decoration:none;transition:background .2s,color .2s}.sidebar-cta-button[data-astro-cid-6vdlxo5s]:hover{background:var(--c-gold, #EFC862);color:var(--c-navy, #1A2B5C)}@media(max-width:1100px){.concepts-cards[data-astro-cid-6vdlxo5s],.concepts-cards--4col[data-astro-cid-6vdlxo5s]{grid-template-columns:repeat(2,1fr)}}@media(max-width:900px){.concepts-container[data-astro-cid-6vdlxo5s]{grid-template-columns:1fr;gap:48px}.concepts-sidebar[data-astro-cid-6vdlxo5s]{position:static;display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.sidebar-cta[data-astro-cid-6vdlxo5s]{grid-column:1 / -1}}@media(max-width:640px){.concepts-hero[data-astro-cid-6vdlxo5s]{padding:80px 20px 32px}.concepts-container[data-astro-cid-6vdlxo5s]{padding:32px 20px 60px}.concepts-cards[data-astro-cid-6vdlxo5s],.concepts-cards--4col[data-astro-cid-6vdlxo5s],.concepts-sidebar[data-astro-cid-6vdlxo5s]{grid-template-columns:1fr}}