:root{--bg:#f6f7f9;--panel:#fff;--text:#111827;--muted:#6b7280;--brand:#06c755;--brand-600:#05b24d;--brand-soft:#e9f9ee;--ring:#e6f6ec;--radius:12px;--shadow:0 6px 24px rgba(2,6,23,.08);--maxw:1120px}*{box-sizing:border-box}body{margin:0;font-family:Helvetica Neue,Helvetica,Segoe UI,Arial,Noto Sans JP,Hiragino Kaku Gothic ProN,Meiryo,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:var(--bg);color:var(--text)}a{color:inherit;text-decoration:none}.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:16px}.header{position:-webkit-sticky;position:sticky;top:0;z-index:10;background:var(--panel);border-bottom:1px solid #e5e7eb;-webkit-backdrop-filter:saturate(180%) blur(6px);backdrop-filter:saturate(180%) blur(6px)}.brand{font-weight:700;letter-spacing:.2px}.nav{display:flex;gap:10px;overflow-x:auto;padding:6px 0}.nav a{padding:10px 14px;border-radius:12px;color:#1f2937;background:var(--brand-soft);transition:all .2s ease;white-space:nowrap;border:1px solid #e5e7eb}.nav a:hover{background:#dcf5e6;border-color:#c9eed8}.mobile-menu{display:none;position:relative}.summary-toggle{cursor:pointer;font-size:22px;padding:6px 10px;border-radius:10px}.summary-toggle:hover{background:var(--ring)}.menu-panel{position:absolute;right:0;top:44px;background:#fff;border:1px solid #e5e7eb;border-radius:var(--radius);box-shadow:var(--shadow);padding:8px;width:220px}@media (max-width:768px){.nav.desktop{display:none}.mobile-menu{display:block}}.hero h1{margin:0 0 6px;font-size:22px}.muted{color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));grid-gap:14px;gap:14px}.card{background:var(--panel);border:1px solid #e5e7eb;border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);transition:transform .15s ease,box-shadow .15s ease}.card:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(2,6,23,.12)}.card h2{margin:0 0 8px;font-size:16px}.card p{margin:0;color:var(--muted)}.card .cta{display:none}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 14px;border-radius:10px;border:1px solid transparent;background:var(--brand);color:#fff;font-weight:600;box-shadow:0 4px 18px rgba(6,199,85,.25)}.btn:hover{background:var(--brand-600)}.footer{color:var(--muted);text-align:center}.settings-leftnav__link{outline:none;transition:background-color .15s ease,box-shadow .15s ease,border-color .15s ease}.settings-leftnav__link:hover{background:#eef8f2;border-color:#c9eed8}.settings-leftnav__link:focus-visible{box-shadow:0 0 0 2px #9de6c0}.settings-leftnav__link[aria-current=page]{font-weight:600}