:root{--font-en:"Hanken Grotesk", "Zen Kaku Gothic New", system-ui, sans-serif;--font-jp:"Zen Kaku Gothic New", "Hanken Grotesk", system-ui, sans-serif;--bg:#f4f1ea;--surface:#fff;--surface-2:#faf8f3;--surface-3:#f0ece2;--ink:#23241f;--ink-2:#5e6057;--ink-3:#8d8f84;--line:#e7e2d6;--line-2:#efebe1;--primary:#2f7d5b;--primary-deep:#245f46;--primary-ink:#1f5440;--primary-soft:#e6f0ea;--primary-tint:#f0f6f2;--speak:#2f7d5b;--speak-soft:#e6f0ea;--speak-ink:#1f5440;--listen:#3f72a6;--listen-soft:#e8eef6;--listen-ink:#2b507c;--write:#c07a3c;--write-soft:#f6ecdf;--write-ink:#8c531f;--read:#8a5fa6;--read-soft:#f0e9f5;--read-ink:#5f3d78;--amber:#d98a3d;--amber-soft:#f8ecdc;--good:#2f7d5b;--good-soft:#e6f0ea;--bad:#c2533f;--bad-soft:#f6e6e1;--r-xs:8px;--r-sm:12px;--r:16px;--r-lg:22px;--r-xl:28px;--pill:999px;--sh-sm:0 1px 2px #28261e0d, 0 1px 3px #28261e0a;--sh:0 2px 6px #28261e0d, 0 6px 18px #28261e0d;--sh-lg:0 8px 30px #28261e1a;--sidebar-w:248px;--maxw:1080px;--bottomnav-h:64px;--topbar-h:56px}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font-en);background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;line-height:1.5}button{cursor:pointer;color:inherit;background:0 0;border:none;font-family:inherit}input,textarea{font-family:inherit}a{color:inherit;text-decoration:none}:lang(ja),.jp{font-family:var(--font-jp)}.en{font-family:var(--font-en);letter-spacing:-.01em}::selection{background:var(--primary-soft)}.app{width:100%;min-height:100vh}.shell-scroll{margin-left:var(--sidebar-w);min-width:0}.page{max-width:var(--maxw);margin:0 auto;padding:40px 48px 96px}.sidebar{width:var(--sidebar-w);background:var(--surface);border-right:1px solid var(--line);z-index:20;flex-direction:column;flex-shrink:0;height:100vh;padding:22px 16px 18px;display:flex;position:fixed;top:0;left:0}.brand{align-items:center;gap:10px;padding:6px 10px 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