:root{--bg: #f0f0f0;--panel: #e0e0e0;--panel-2: #d0d0d0;--text: #101010;--muted: #666666;--accent: #3366cc;--danger: #cc3333}*{box-sizing:border-box}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans JP,"Apple Color Emoji","Segoe UI Emoji";background:var(--bg);color:var(--text)}header{padding:16px 20px;border-bottom:1px solid #cccccc;background:linear-gradient(180deg,#f0f0f0,#e0e0e0);position:sticky;top:0;z-index:10}h1{margin:0;font-size:18px;letter-spacing:.02em}.container{display:grid;grid-template-columns:1fr;gap:16px;padding:16px;margin:0 auto}.card{background:#fff;border:1px solid #cccccc;border-radius:14px;overflow:hidden}.card>.head{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid #cccccc;background:var(--panel-2)}.card>.body{padding:12px}textarea{width:100%;min-height:140px;max-height:45vh;resize:vertical;background:#fff;color:var(--text);border:1px solid #cccccc;border-radius:10px;padding:10px 12px;font-size:14px;line-height:1.45}.controls{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:8px}button{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid #cccccc;background:#e0e0e0;color:var(--text);padding:8px 12px;font-weight:600;border-radius:10px;cursor:pointer}button:hover{background:#d0d0d0}.muted{color:var(--muted);font-size:12px}.canvas-wrap{display:grid;grid-template-columns:1fr;gap:8px;justify-items:center;padding:8px}canvas{background:transparent;border-radius:12px;width:100%;aspect-ratio:1/1}.legend{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted)}.legend-bar{width:220px;height:10px;border-radius:999px;border:1px solid #cccccc;background:linear-gradient(90deg,red,#ff0,#0f0,#0ff,#00f,#f0f)}.error{color:var(--danger);font-size:13px;white-space:pre-wrap}.stat{font-size:12px;color:var(--muted)}label{font-size:12px;color:#000}input[type=number]{width:80px;padding:6px 8px;border-radius:8px;border:1px solid #cccccc;background:#fff;color:var(--text)}