:root{--color-bg-base: #faf6ef;--color-bg-surface: #ffffff;--color-bg-subtle: #f5efe6;--color-text-main: #2d2a26;--color-text-muted: #6e685e;--color-text-light: #9b9488;--color-period-triassic: #ba5d38;--color-period-jurassic: #2d6a4f;--color-period-cretaceous-early: #4a90e2;--color-period-cretaceous-late: #2a75d3;--color-diet-carnivore: #c84646;--color-diet-herbivore: #3f8a52;--color-diet-omnivore: #d9822b;--color-diet-piscivore: #2e86ab;--color-primary: #2d6a4f;--color-primary-hover: #1e4d38;--color-secondary: #e07a5f;--color-audio-active: #e07a5f;--color-focus: #3b82f6;--color-border: #e8dfd3;--font-family-kids: "Zen Maru Gothic", "M PLUS Rounded 1c", -apple-system, BlinkMacSystemFont, "Hiragino Maru Gothic ProN", sans-serif;--font-family-body: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;--radius-sm: .5rem;--radius-md: 1rem;--radius-lg: 1.5rem;--radius-full: 9999px;--shadow-sm: 0 2px 6px rgba(45, 42, 38, .04);--shadow-card: 0 6px 18px rgba(45, 42, 38, .07);--shadow-button: 0 4px 12px rgba(45, 42, 38, .12)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-family:var(--font-family-body);background-color:var(--color-bg-base);color:var(--color-text-main);line-height:1.6;-webkit-text-size-adjust:100%}body{min-height:100vh;display:flex;flex-direction:column}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer;border:none;background:none}.font-kids{font-family:var(--font-family-kids);letter-spacing:.04em}.btn-large{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:4rem;min-width:4rem;padding:.8rem 1.6rem;border-radius:var(--radius-lg);font-family:var(--font-family-kids);font-size:1.25rem;font-weight:700;box-shadow:var(--shadow-button);transition:transform .15s ease,background-color .15s ease,box-shadow .15s ease;user-select:none;-webkit-tap-highlight-color:transparent}.btn-large:active{transform:scale(.97)}.container{width:100%;max-width:960px;margin-left:auto;margin-right:auto;padding-left:1rem;padding-right:1rem}@media(min-width:640px){.container{padding-left:1.5rem;padding-right:1.5rem}}.card{background-color:var(--color-bg-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);border:1px solid var(--color-border);overflow:hidden;transition:transform .2s ease,box-shadow .2s ease}.card:hover{transform:translateY(-3px);box-shadow:0 10px 24px #2d2a261a}.site-header[data-astro-cid-37fxchfa]{background-color:var(--color-bg-surface);border-bottom:2px solid var(--color-border);position:sticky;top:0;z-index:50}.header-container[data-astro-cid-37fxchfa]{display:flex;align-items:center;justify-content:space-between;height:4rem}.logo[data-astro-cid-37fxchfa]{display:flex;align-items:center;gap:.5rem;font-size:1.4rem;font-weight:900;color:var(--color-text-main)}.logo-mark[data-astro-cid-37fxchfa]{font-size:1.8rem}.nav[data-astro-cid-37fxchfa]{display:flex;gap:1rem}.nav-link[data-astro-cid-37fxchfa]{font-size:1.1rem;font-weight:700;padding:.5rem .9rem;border-radius:var(--radius-full);background-color:var(--color-bg-subtle);color:var(--color-text-main);transition:background-color .15s ease}.nav-link[data-astro-cid-37fxchfa]:hover{background-color:var(--color-border)}.main-content[data-astro-cid-37fxchfa]{flex:1;padding-bottom:4rem}.site-footer[data-astro-cid-37fxchfa]{background-color:var(--color-bg-subtle);border-top:2px solid var(--color-border);padding:3rem 0 2rem;margin-top:auto}.footer-container[data-astro-cid-37fxchfa]{display:flex;flex-direction:column;gap:2rem}.footer-nav[data-astro-cid-37fxchfa]{display:flex;flex-direction:column;gap:1.5rem}.footer-links[data-astro-cid-37fxchfa]{display:flex;gap:1.5rem;font-size:1.1rem;font-weight:700}.footer-links[data-astro-cid-37fxchfa] a[data-astro-cid-37fxchfa]:hover{color:var(--color-primary);text-decoration:underline}.parent-section[data-astro-cid-37fxchfa]{background-color:var(--color-bg-surface);padding:1.25rem 1.5rem;border-radius:var(--radius-md);border:1px solid var(--color-border)}.parent-title[data-astro-cid-37fxchfa]{font-size:.95rem;font-weight:700;color:var(--color-text-main);margin-bottom:.4rem}.parent-text[data-astro-cid-37fxchfa]{font-size:.85rem;color:var(--color-text-muted);line-height:1.6;margin-bottom:.6rem}.parent-links[data-astro-cid-37fxchfa]{display:flex;align-items:center;gap:.5rem;font-size:.85rem;color:var(--color-primary)}.parent-links[data-astro-cid-37fxchfa] a[data-astro-cid-37fxchfa]{text-decoration:underline}.footer-bottom[data-astro-cid-37fxchfa]{text-align:center;font-size:.8rem;color:var(--color-text-light);border-top:1px solid var(--color-border);padding-top:1.5rem}