:root{--bg:#fff;--ink:#16181d;--muted:#6b7280;--line:#e5e7eb;--surface:#f7f7f6;--accent:#0f766e;--accent-ink:#0b5750;--danger:#b42318;--ok:#067647;--radius-btn:8px;--radius-card:12px;--radius-input:6px}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--ink);margin:0;font-family:-apple-system,BlinkMacSystemFont,Helvetica Neue,Hiragino Kaku Gothic ProN,Yu Gothic,Meiryo,sans-serif;font-size:16px;line-height:1.6}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}h1{letter-spacing:-.01em;margin:0 0 8px;font-size:30px;line-height:1.25}h2{margin:0 0 12px;font-size:20px;line-height:1.3}p{margin:0 0 12px}small,.caption{color:var(--muted);font-size:13px}.container{max-width:880px;margin:0 auto;padding:32px 24px 64px}.narrow{max-width:420px}.appbar{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;max-width:880px;margin:0 auto;padding:16px 24px;display:flex}.brand{letter-spacing:-.01em;color:var(--ink);font-weight:700}.btn{border-radius:var(--radius-btn);cursor:pointer;border:1px solid #0000;justify-content:center;align-items:center;gap:8px;padding:10px 16px;font-size:15px;font-weight:600;transition:background .15s,border-color .15s,opacity .15s;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--ink);color:#fff}.btn-primary:hover:not(:disabled){background:#000}.btn-secondary{color:var(--ink);border-color:var(--line);background:#fff}.btn-secondary:hover:not(:disabled){border-color:var(--ink)}.btn-danger{color:var(--danger);border-color:var(--line);background:#fff}.btn-danger:hover:not(:disabled){border-color:var(--danger)}.btn-block{width:100%}.field{margin-bottom:16px}.field label{margin-bottom:6px;font-size:14px;font-weight:600;display:block}.input{border:1px solid var(--line);border-radius:var(--radius-input);width:100%;color:var(--ink);background:#fff;padding:10px 12px;font-size:15px}.input:focus{outline:2px solid var(--accent);outline-offset:0;border-color:var(--accent)}.help{color:var(--muted);margin-top:6px;font-size:13px}.card{border:1px solid var(--line);border-radius:var(--radius-card);padding:24px}.section{margin-top:40px}.row{justify-content:space-between;align-items:center;gap:16px;display:flex}.plan-actions{align-items:center;gap:12px;display:flex}.meter{background:var(--surface);border-radius:999px;height:8px;overflow:hidden}.meter>span{background:var(--accent);height:100%;display:block}.badge{border:1px solid var(--line);border-radius:999px;padding:2px 8px;font-size:12px;font-weight:700}.badge-pro{color:var(--accent-ink);border-color:var(--accent)}.alert{border-radius:var(--radius-input);margin-bottom:16px;padding:10px 12px;font-size:14px}.alert-error{color:var(--danger);background:#fdf3f2;border:1px solid #f3c7c2}.alert-ok{color:var(--ok);background:#f1f9f4;border:1px solid #c6e6d3}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.empty{color:var(--muted);text-align:center;padding:24px 0}.muted{color:var(--muted)}.stack>*+*{margin-top:8px}@media (width<=560px){.plan-actions{flex-direction:column;align-items:stretch}.plan-actions .btn{width:100%}}