:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;--bg:#faf6ec;--surface:#fffdf6;--fg:#2d2a26;--muted:#6b6356;--border:#e1cba0;--border-strong:#d9c091;--chat-bg:var(--bg);--wood-bg:#f3e8ce;--wood-line:#eee0c3;--wood-line-soft:#e1cba059;--border-wood:#e1cba0;--on-wood:#6e5230;--wood-chip:#faf3e2;--wood-chip-hover:#f0e2bf;--accent:#3f6b45;--accent-hover:#2f5234;--accent-shadow:#2b4a30;--on-accent:#fff;--focus-ring:#3f6b4524;--student-bg:#efe2c4;--student-border:#e1cba0;--ai-bg:#eef1e2;--ai-border:#d5dec1;--row-hover:#e6d3ab73;--row-current:#e6d3ab;--row-current-border:#d9c091;--menu-hover:#f3ead6;--menu-divider:#ebddbe;--shadow-menu:0 8px 22px #6e523029;--disabled-bg:#ede4cf;--disabled-fg:#8a7f6e;--accent-soft:var(--student-bg);--leaf:var(--accent);--leaf-soft:var(--ai-bg);--border-leaf:var(--ai-border);--notice-bg:#f0e9de;--notice-fg:#655b4d;--danger:#9a4a35;--danger-tint:#9a4a351f;--radius:.875rem;--ease-out:cubic-bezier(.2, .7, .2, 1)}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--fg);font-family:var(--font-zen-maru), "Zen Maru Gothic", "Hiragino Maru Gothic ProN", "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;line-height:1.7}.visually-hidden{clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}a,button{-webkit-tap-highlight-color:transparent}