:root{--brand-yellow:#ffe800;--brand-yellow-strong:#f2dc00;--brand-cyan:#29abe2;--brand-cyan-strong:#1b93c6;--brand-dark:#12141c;--bg:#f4f6f8;--surface:#fff;--surface-sunken:#eef1f4;--border:#dfe3e8;--border-strong:#c7ccd4;--text:#12141c;--text-muted:#5f6672;--text-on-dark:#f2f4f7;--text-on-dark-muted:#a7aebc;--accent:var(--brand-cyan);--accent-strong:var(--brand-cyan-strong);--action:var(--brand-yellow);--action-strong:var(--brand-yellow-strong);--on-action:var(--brand-dark);--focus:var(--brand-cyan);--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-full:999px;--shadow-1:0 1px 2px #12141c0f;--shadow-2:0 6px 20px #12141c1a;--content-max:720px}*{box-sizing:border-box;margin:0;padding:0}html,body{max-width:100vw;overflow-x:hidden}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic,system-ui,sans-serif;line-height:1.7}a{color:inherit;text-decoration:none}:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-1)}.page-title{font-size:1.5rem;line-height:1.3}.muted{color:var(--text-muted);font-size:.9rem}.btn{border-radius:var(--radius-sm);cursor:pointer;border:1px solid #0000;align-items:center;gap:8px;padding:10px 20px;font-family:inherit;font-size:.95rem;font-weight:600;display:inline-flex}.btn-primary{background:var(--action);color:var(--on-action)}.btn-primary:hover{background:var(--action-strong)}.btn-ghost{border-color:var(--border-strong);color:var(--text);background:0 0}.btn-ghost:hover{background:var(--surface-sunken)}.icon-btn{border-radius:var(--radius-full);background:var(--action);width:44px;height:44px;color:var(--on-action);cursor:pointer;border:1px solid #0000;flex:none;justify-content:center;align-items:center;display:inline-flex}.icon-btn:hover{background:var(--action-strong)}.icon-btn svg{width:22px;height:22px}.icon-btn-on-dark{color:var(--text-on-dark);background:0 0;border-color:#ffffff3d}.icon-btn-on-dark:hover{background:#ffffff1f;border-color:#fff6}.card-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;display:grid}@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}