:root{--bg: #ffffff;--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{margin:0;background:var(--bg);color:var(--ink);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{font-size:30px;line-height:1.25;margin:0 0 8px;letter-spacing:-.01em}h2{font-size:20px;line-height:1.3;margin:0 0 12px}p{margin:0 0 12px}small,.caption{font-size:13px;color:var(--muted)}.container{max-width:880px;margin:0 auto;padding:32px 24px 64px}.narrow{max-width:420px}.appbar{display:flex;align-items:center;justify-content:space-between;max-width:880px;margin:0 auto;padding:16px 24px;border-bottom:1px solid var(--line)}.brand{font-weight:700;letter-spacing:-.01em;color:var(--ink)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:600;padding:10px 16px;border-radius:var(--radius-btn);border:1px solid transparent;cursor:pointer;transition:background .15s,border-color .15s,opacity .15s}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--ink);color:#fff}.btn-primary:hover:not(:disabled){background:#000}.btn-secondary{background:#fff;color:var(--ink);border-color:var(--line)}.btn-secondary:hover:not(:disabled){border-color:var(--ink)}.btn-danger{background:#fff;color:var(--danger);border-color:var(--line)}.btn-danger:hover:not(:disabled){border-color:var(--danger)}.btn-block{width:100%}.field{margin-bottom:16px}.field label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}.input{width:100%;font-size:15px;padding:10px 12px;border:1px solid var(--line);border-radius:var(--radius-input);background:#fff;color:var(--ink)}.input:focus{outline:2px solid var(--accent);outline-offset:0;border-color:var(--accent)}.help{font-size:13px;color:var(--muted);margin-top:6px}.card{border:1px solid var(--line);border-radius:var(--radius-card);padding:24px}.section{margin-top:40px}.row{display:flex;align-items:center;justify-content:space-between;gap:16px}.meter{height:8px;background:var(--surface);border-radius:999px;overflow:hidden}.meter>span{display:block;height:100%;background:var(--accent)}.badge{font-size:12px;font-weight:700;padding:2px 8px;border-radius:999px;border:1px solid var(--line)}.badge-pro{color:var(--accent-ink);border-color:var(--accent)}.alert{font-size:14px;padding:10px 12px;border-radius:var(--radius-input);margin-bottom:16px}.alert-error{color:var(--danger);border:1px solid #f3c7c2;background:#fdf3f2}.alert-ok{color:var(--ok);border:1px solid #c6e6d3;background:#f1f9f4}.token-list{list-style:none;margin:0;padding:0}.token-item{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;border-top:1px solid var(--line)}.token-item:first-child{border-top:0}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.token-reveal{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-input);padding:12px 14px}.token-reveal .mono{word-break:break-all}.empty{color:var(--muted);padding:24px 0;text-align:center}.muted{color:var(--muted)}.stack>*+*{margin-top:8px}