:root{--bg-primary:#ffffff;--bg-secondary:#f7f7f5;--bg-tertiary:#efede9;--bg-card:#ffffff;--bg-hover:#f1f1ef;--text-primary:#1a1a1a;--text-secondary:#6b6b6b;--text-muted:#9b9b9b;--text-inverse:#ffffff;--border-color:#e5e5e3;--border-focus:#2383e2;--accent-blue:#2383e2;--accent-blue-light:#e8f2fd;--accent-green:#0f9d58;--accent-green-light:#e6f4ea;--accent-orange:#e8803a;--accent-orange-light:#fdf0e6;--accent-red:#e03e3e;--accent-red-light:#fdecea;--accent-purple:#6940a5;--accent-purple-light:#f0ebfa;--difficulty-beginner:#0f9d58;--difficulty-beginner-bg:#e6f4ea;--difficulty-lower-mid:#2383e2;--difficulty-lower-mid-bg:#e8f2fd;--difficulty-mid:#e8803a;--difficulty-mid-bg:#fdf0e6;--difficulty-upper-mid:#e03e3e;--difficulty-upper-mid-bg:#fdecea;--status-todo:#9b9b9b;--status-todo-bg:#f1f1ef;--status-doing:#2383e2;--status-doing-bg:#e8f2fd;--status-done:#0f9d58;--status-done-bg:#e6f4ea;--shadow-sm:0 1px 3px rgba(0,0,0,0.06);--shadow-md:0 4px 12px rgba(0,0,0,0.08);--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--nav-height:64px;--header-height:56px;--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;--font-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace}[data-theme=dark]{--bg-primary:#191919;--bg-secondary:#1f1f1f;--bg-tertiary:#252525;--bg-card:#1f1f1f;--bg-hover:#2b2b2b;--text-primary:#e6e6e6;--text-secondary:#9b9b9b;--text-muted:#6b6b6b;--text-inverse:#1a1a1a;--border-color:#2f2f2f;--border-focus:#529cda;--accent-blue:#529cda;--accent-blue-light:#1a2d3d;--accent-green:#4caf73;--accent-green-light:#1a2d23;--accent-orange:#e8903a;--accent-orange-light:#2d2015;--accent-red:#e05050;--accent-red-light:#2d1a1a;--accent-purple:#9b72cf;--accent-purple-light:#231a33;--difficulty-beginner:#4caf73;--difficulty-beginner-bg:#1a2d23;--difficulty-lower-mid:#529cda;--difficulty-lower-mid-bg:#1a2d3d;--difficulty-mid:#e8903a;--difficulty-mid-bg:#2d2015;--difficulty-upper-mid:#e05050;--difficulty-upper-mid-bg:#2d1a1a;--status-todo:#6b6b6b;--status-todo-bg:#2b2b2b;--status-doing:#529cda;--status-doing-bg:#1a2d3d;--status-done:#4caf73;--status-done-bg:#1a2d23;--shadow-sm:0 1px 3px rgba(0,0,0,0.3);--shadow-md:0 4px 12px rgba(0,0,0,0.4)}*,:after,:before{box-sizing:border-box;padding:0;margin:0}html{height:100%;font-size:16px}body,html{max-width:100vw;overflow-x:hidden}body{min-height:100%;display:flex;flex-direction:column;color:var(--text-primary);background:var(--bg-primary);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color .2s ease,color .2s ease}a{color:inherit;text-decoration:none}button{cursor:pointer}button,input,textarea{font-family:var(--font-sans)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.BottomNav_nav__UE8yb{position:fixed;bottom:0;left:0;right:0;height:var(--nav-height);background:var(--bg-card);border-top:1px solid var(--border-color);display:flex;align-items:stretch;z-index:100;padding-bottom:env(safe-area-inset-bottom,0)}.BottomNav_item__YVhtQ{flex:1 1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:var(--text-muted);transition:color .15s ease;-webkit-tap-highlight-color:transparent;padding:8px 4px}.BottomNav_item__YVhtQ:active{background:var(--bg-hover)}.BottomNav_active__jBKAp{color:var(--accent-blue)}.BottomNav_iconWrap__N3pqN{display:flex;align-items:center;justify-content:center;width:24px;height:24px}.BottomNav_label__wTS_m{font-size:10px;font-weight:500;letter-spacing:.02em}