:root{--bg: #0d1018;--panel: #1a2030;--line: #2c364c;--ink: #eef2fb;--dim: #95a3c0;--accent: #d0a040;--beam: #ffd86a;--calib: #58c7ff;--target: #6be38f;--bad: #e0654a}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#141a2a,var(--bg));color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,sans-serif;display:flex;justify-content:center;-webkit-user-select:none;user-select:none}#app{width:100%;max-width:600px;padding:12px 12px 26px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:26px;letter-spacing:3px;font-weight:800;color:var(--accent)}.sub{margin:2px 0 0;color:var(--dim);font-size:13px}.bar{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center;margin:9px 0}.seg{display:inline-flex;background:var(--panel);border:1px solid var(--line);border-radius:999px;overflow:hidden}.seg button{background:none;border:none;color:var(--dim);padding:6px 13px;font:600 13px system-ui;cursor:pointer}.seg button.active{background:var(--accent);color:#20180a}.btn{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:7px 14px;border-radius:999px;font:700 13px system-ui;cursor:pointer}.btn:hover{border-color:var(--accent)}.status{text-align:center;min-height:20px;margin:6px 0;color:var(--dim);font-size:13px;font-weight:600}.status b{color:var(--ink)}.calibcard{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin:8px auto;max-width:520px;font-size:13px;color:var(--dim)}.calibcard .row{display:flex;gap:8px;align-items:center;justify-content:center;flex-wrap:wrap}.calibcard label{color:var(--calib);font-weight:700}.calibcard input{width:78px;background:#0e1422;border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:6px 8px;font:700 14px ui-monospace,monospace;text-align:center}.calibcard .res{font-weight:700}.calibcard .res.ok{color:var(--target)}.calibcard .res.no{color:var(--bad)}.calibcard .small{font-size:11.5px;opacity:.9}.stage{position:relative;display:flex;justify-content:center}canvas{width:100%;max-width:520px;height:auto;display:block;border-radius:8px;background:#070a12;box-shadow:0 12px 34px #0000008c;touch-action:none;cursor:grab}canvas.grabbing{cursor:grabbing}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#070a12c7;border-radius:8px;backdrop-filter:blur(3px)}.overlay.hidden{display:none}.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px 26px;text-align:center;max-width:360px}.card h2{margin:0 0 6px;font-size:24px;color:var(--accent)}.card p{margin:6px 0;color:var(--dim);font-size:14px}.card .row{display:flex;gap:8px;justify-content:center;margin-top:14px}.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:10px;line-height:1.5}.hint b{color:var(--accent)}