:root{color-scheme:dark;--bg:#0c151c;--panel:#101f29;--ink:#e8eef0;--muted:#a9bbc6;--line:#354956;--gold:#f4c674;--cyan:#75dbd2;font-family:system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0}main{max-width:1220px;margin:auto;padding:48px 32px}header{max-width:790px;margin-bottom:32px}.eyebrow{font-size:12px;font-weight:650;letter-spacing:.13em;color:var(--muted)}h1{font-size:clamp(38px,6vw,66px);line-height:1.05;letter-spacing:-.045em;margin:18px 0}h1 span{color:var(--gold)}.intro{font-size:19px;line-height:1.6;color:var(--muted);max-width:640px}.workbench{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(300px,1fr);gap:28px;align-items:start}.field-panel{border:1px solid var(--line);background:var(--panel);border-radius:12px;overflow:hidden}.field-top{padding:18px 20px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font:11px ui-monospace,monospace;color:var(--muted)}#field{display:block;width:100%;height:auto;touch-action:none;cursor:crosshair}#field text{font:13px ui-monospace,monospace;fill:var(--ink)}.legend{display:flex;flex-wrap:wrap;gap:12px 22px;padding:16px 20px 0;font-size:12px}.legend span{display:flex;align-items:center;gap:8px}.legend i{width:22px;border-top:2px solid var(--gold)}.legend .fixed{border-top:2px dashed var(--cyan)}.field-hint{font-size:13px;line-height:1.5;color:var(--muted);padding:0 20px}#result{border-top:1px solid var(--line);padding:18px 20px;margin:16px 0 0;min-height:94px;line-height:1.6;font-size:15px}.controls{padding:4px 0}label{font-size:14px;font-weight:550;display:block}input,select,button{font:inherit;color:inherit}input[type=number],select{background:#172a37;border:1px solid #526977;border-radius:6px;min-height:44px;font-size:16px;padding:8px 10px}input[type=number]{width:94px;text-align:right}input[type=range]{width:100%;min-height:44px;accent-color:var(--gold);margin:4px 0}input[type=checkbox]{width:18px;height:18px;accent-color:var(--gold)}select{width:100%;margin:10px 0}button{min-height:44px;border:1px solid #526977;border-radius:6px;background:#172a37;padding:10px 14px;cursor:pointer;font-size:14px;font-weight:600}button:disabled{opacity:.55;cursor:wait}.primary{background:var(--gold);color:#17212a;border-color:var(--gold);flex:1}.primary span{margin-left:8px}button.quiet{background:transparent;color:var(--muted);margin-top:18px}.buttons{display:flex;gap:8px;margin:14px 0}.control-heading{display:flex;justify-content:space-between;align-items:center}.note{font-size:13px;line-height:1.6;color:var(--muted)}#angle-note{min-height:21px;margin-top:0}output{float:right;font-variant-numeric:tabular-nums}.toggles label{display:flex;align-items:center;gap:9px;min-height:44px}.calculation{padding:16px 0;border-block:1px solid var(--line);margin:14px 0 20px}.calculation p{margin:8px 0}.calculation p:not(.note):not(.eyebrow),.mono{font:13px/1.8 ui-monospace,monospace;font-variant-numeric:tabular-nums}.mono{min-height:80px;overflow-wrap:anywhere}details{margin-top:20px;border-top:1px solid var(--line);padding-top:10px}summary{cursor:pointer;min-height:44px;padding:12px 0;font-size:14px;font-weight:600}details p{line-height:1.6;font-size:14px}.explanation{display:grid;grid-template-columns:1fr 1fr;gap:56px;margin-top:48px;border-top:1px solid var(--line);padding-top:28px}h2{font-size:25px;letter-spacing:-.02em}article p:not(.eyebrow){font-size:15px;line-height:1.8;color:var(--muted)}strong{color:var(--ink);font-weight:600}footer{font-size:12px;line-height:1.8;color:var(--muted);max-width:820px;border-top:1px solid var(--line);padding-top:22px;margin-top:36px}:focus-visible{outline:3px solid var(--cyan);outline-offset:4px}@media(hover:hover){button:hover:not(:disabled){filter:brightness(1.12)}summary:hover{color:var(--gold)}}@media(max-width:780px){main{padding:28px 18px}.workbench,.explanation{grid-template-columns:1fr;gap:24px}.controls{padding:0 4px}.explanation{margin-top:28px}.field-top{font-size:10px}.intro{font-size:17px}}