:root{
  --ink:#1B2A4A; --teal:#2E7D8F; --amber:#B5651D; --line:#e3e9ec;
  --bg:#f7f9fa; --panel:#ffffff; --muted:#5a6270;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:#1d2733}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 22px;background:var(--ink);color:#fff}
.brand{font-weight:700;letter-spacing:.3px}.brand .dot{color:var(--teal);margin:0 3px}
.tag{font-size:12px;color:#aebfd6;text-transform:uppercase;letter-spacing:1px}
.wrap{max-width:1040px;margin:0 auto;padding:22px 18px 60px}
.intro h1{margin:.2em 0 .1em;color:var(--ink);font-size:30px}
.subtitle{color:var(--amber);font-weight:600;margin:.1em 0 .5em}
.mission{color:var(--muted);max-width:70ch;line-height:1.5}
.stage{display:flex;gap:16px;margin-top:16px;flex-wrap:wrap}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px;box-shadow:0 1px 3px rgba(20,40,60,.05);flex:1 1 100%}
.signal-panel{flex:2 1 560px}.arm-panel{flex:1 1 240px;display:flex;flex-direction:column}
.panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.panel-head h2{font-size:15px;margin:0;color:var(--ink)}
.legend{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:6px}
.legend i{width:12px;height:3px;display:inline-block;border-radius:2px;margin-left:8px}
canvas{width:100%;height:auto;background:#fff;border-radius:8px}
#arm{background:linear-gradient(#f4f8f9,#e9eff1)}
.playbar{display:flex;align-items:center;gap:10px;margin-top:10px}
.btn{background:var(--teal);color:#fff;border:none;border-radius:8px;padding:8px 14px;font-weight:600;cursor:pointer}
.btn.ghost{background:#eef2f4;color:var(--ink)}
.scorebox{margin-left:auto;color:var(--muted);font-size:14px}.scorebox b{font-size:18px;margin-left:4px}
.pipeline-strip{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin:2px 0 14px}
.blk{background:#eef5f6;border:1px solid #d4e2e5;color:var(--ink);border-radius:7px;padding:5px 10px;font-size:13px;font-weight:600}
.blk.out{background:var(--ink);color:#fff;border-color:var(--ink)}
.arrow{color:var(--amber);font-weight:700}
.controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.ctrl{display:flex;flex-direction:column;gap:4px;font-size:13px}
.ctrl-row{display:flex;justify-content:space-between}.ctrl-row output{color:var(--teal);font-weight:700}
.ctrl input[type=range]{width:100%;accent-color:var(--teal)}
.ctrl small{color:var(--muted)}
.row{display:flex;gap:26px;margin-top:16px;flex-wrap:wrap}
.row h3{font-size:13px;margin:0 0 6px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.btnrow{display:flex;gap:8px;flex-wrap:wrap}
.toggle{border:1px solid #d4e2e5;background:#fff;border-radius:20px;padding:6px 14px;font-size:13px;cursor:pointer;color:var(--muted)}
.toggle.on{background:var(--teal);color:#fff;border-color:var(--teal)}
.debrief{margin-top:16px;background:#eef5f6;border-left:4px solid var(--teal);padding:12px 14px;border-radius:6px;color:var(--ink);line-height:1.5}
.foot{margin-top:26px;color:var(--muted);font-size:12px;text-align:center}
.foot code{background:#eef2f4;padding:1px 5px;border-radius:4px}