style.css

:root{color-scheme:dark;--bg:#091316;--panel:#0e1b1f;--line:#25383d;--text:#e7eeea;--muted:#8b9d9f;--cyan:#87d5c7;--gold:#dfad7b;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);overscroll-behavior:none}button,a,input,summary{-webkit-tap-highlight-color:transparent}button,input,summary{font:inherit}button,a{transition:background .18s,color .18s,border-color .18s}button{color:inherit;background:transparent;border:1px solid var(--line);cursor:pointer;border-radius:5px;padding:10px 14px}button:hover{background:#1c3035;border-color:#507078}button:focus-visible,summary:focus-visible,a:focus-visible{outline:2px solid var(--gold);outline-offset:4px}button:disabled{opacity:.4;cursor:wait}a{color:var(--cyan);text-decoration:none}header{max-width:1600px;margin:auto;padding:25px 36px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{font-size:19px;letter-spacing:-.4px;color:var(--text);font-weight:600}.brand span{font-size:12px;letter-spacing:2px;font-weight:400;color:var(--cyan);margin-left:10px}.head-actions{display:flex;gap:10px}.head-actions button{font-size:12px;border:0;color:var(--muted)}main{max-width:1600px;margin:auto;padding:24px 36px 12px}nav{display:flex;gap:6px}nav button{border:0;padding:12px 17px;color:var(--muted);font-size:13px}nav button b{font-weight:500}nav button span{font-size:10px;color:#627c82;margin-right:9px}nav button.active{background:#1c3437;color:var(--cyan)}.intro{display:flex;justify-content:space-between;align-items:end;padding:27px 0 30px;gap:24px}.eyebrow,.section-caption{font-size:10px;letter-spacing:1.8px;color:var(--cyan);font-weight:600}.eyebrow{margin:0 0 13px}h1{font-size:clamp(30px,3.4vw,53px);font-weight:450;letter-spacing:-1.8px;margin:0;line-height:1.15}.intro>p{font-size:14px;color:var(--muted);margin:0 0 6px;max-width:360px;line-height:1.7}.workbench{display:grid;grid-template-columns:minmax(0,1fr) 300px;border:1px solid var(--line);border-radius:8px;overflow:hidden}.stage{position:relative;min-width:0;background:radial-gradient(ellipse at 55% 45%,#14292e,transparent 67%),#0d191d;height:600px;min-height:480px}canvas{width:100%;height:100%;display:block;touch-action:none;cursor:crosshair;outline-offset:-4px}.stage-top,.stage-bottom{position:absolute;left:24px;right:24px;display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:10px;color:var(--muted);pointer-events:none}.stage-top{top:22px}.stage-top i{display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--cyan);margin-right:6px}.stage-bottom{bottom:20px}.legend{display:flex;gap:7px;align-items:center}.dot{width:6px;height:6px;border-radius:50%;display:inline-block}.teal{background:var(--cyan)}.amber{background:var(--gold);margin-left:12px}aside{padding:26px 24px;background:#101c20;border-left:1px solid var(--line)}.section-caption{color:var(--muted);letter-spacing:1.3px;font-size:10px}.presets{display:flex;gap:7px;margin:15px 0 27px}.presets button{flex:1;height:56px;padding:6px;color:var(--cyan);border-color:#2a4247}.presets svg{width:45px;height:30px;stroke:currentColor;fill:none;stroke-width:2}.result{border-top:1px solid var(--line);padding-top:23px;margin-top:10px}.metric{display:flex;align-items:baseline;gap:7px;margin:10px 0}.metric strong{font-size:39px;font-weight:400;letter-spacing:-1px;font-variant-numeric:tabular-nums}.metric span{font-size:12px;color:var(--muted)}#status{font-size:12px;color:var(--cyan);min-height:38px;line-height:1.5}.coordinates{display:flex;justify-content:space-between;gap:8px;font-size:11px;color:var(--muted);margin:10px 0 24px}.coordinates output{font-variant-numeric:tabular-nums;color:var(--text)}.primary{width:100%;background:var(--cyan);color:#092221;border-color:var(--cyan);padding:13px;font-size:13px}.primary:hover{background:#afe4d8;border-color:#afe4d8}.primary>span:first-child{margin-right:6px}.progress-track{height:2px;background:#263d42;margin-top:9px}#progress{height:100%;width:0;background:var(--gold)}.quiet{font-size:11px;color:var(--muted);line-height:1.7}.utilities{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:14px;margin-top:22px;gap:10px}.utilities button{border:0;padding:6px 0;font-size:11px;color:var(--muted)}details{margin-top:22px}summary{font-size:12px;cursor:pointer;color:var(--text);padding:8px 0}.zone-row{display:flex;align-items:center;gap:8px;font-size:12px;margin-top:11px}.zone-row input{min-width:0;flex:1}.zone-row output{width:36px;text-align:right;font-variant-numeric:tabular-nums}input[type=range]{accent-color:var(--cyan);cursor:pointer}#branch-controls label{display:flex;justify-content:space-between;font-size:12px;margin-top:16px}#load{width:100%;margin:18px 0}.branch-options{display:flex;gap:4px}.branch-options button{flex:1;padding:10px 4px;font-size:12px}.branch-options .active{background:#234045;border-color:var(--cyan);color:var(--cyan)}footer{display:flex;justify-content:space-between;gap:20px;padding:19px 0;font-size:11px;line-height:1.7;color:var(--muted)}footer p{margin:0}footer>div{display:flex;gap:20px}dialog{max-width:580px;width:calc(100% - 36px);background:var(--panel);color:var(--text);border:1px solid #40575b;border-radius:12px;padding:38px;line-height:1.8;font-size:14px}dialog::backdrop{background:#000a;backdrop-filter:blur(5px)}dialog h2{font-size:28px;font-weight:450}#close-method{position:absolute;right:12px;top:8px;font-size:25px;border:0;padding:4px 10px}[hidden]{display:none!important}@media(min-width:1500px){.stage{height:650px}}@media(max-width:950px){header{padding:20px}main{padding:20px}.workbench{grid-template-columns:minmax(0,1fr) 260px}aside{padding:22px 18px}.stage{height:580px}.intro>p{max-width:240px}.stage-top,.stage-bottom{left:16px;right:16px}}@media(max-width:700px){header{padding:17px 16px}.brand{font-size:16px}.brand span{font-size:9px;letter-spacing:1px;margin-left:5px}.head-actions{gap:0}.head-actions button{padding:8px;font-size:11px}main{padding:14px}nav{justify-content:space-between;gap:2px}nav button{font-size:11px;padding:10px 7px}nav button span{margin-right:4px}.intro{display:block;padding:25px 2px}.intro>p{margin:12px 0 0;max-width:none;font-size:12px}h1{font-size:34px;letter-spacing:-1px}.eyebrow{font-size:9px}.workbench{display:flex;flex-direction:column}.stage{height:440px;min-height:0}.stage-top{top:16px;font-size:9px}.stage-bottom{font-size:8px;bottom:14px}aside{border-left:0;border-top:1px solid var(--line);padding:22px}.presets{margin:12px 0 20px}.result{position:relative}.metric strong{font-size:32px}.coordinates{position:absolute;right:0;top:27px;display:block;text-align:right}.coordinates output{display:block;margin-top:8px}footer{display:block;font-size:10px}footer>div{margin-top:12px}dialog{padding:28px}.stage-bottom>span{max-width:120px;text-align:right}}
#zone-select{display:flex;justify-content:space-between;align-items:center;margin:0 0 22px;font-size:12px;color:var(--muted)}#zones{font:inherit;background:#14272c;color:var(--text);border:1px solid #45636a;border-radius:4px;padding:7px 12px;min-width:72px}#controls[open]{max-height:320px;overflow-y:auto;padding-right:6px}
/* Desktop is an instrument panel, not a scrolling landing page. */
canvas:focus{outline:none}canvas.keyboard-focus:focus{outline:2px solid var(--gold);outline-offset:-4px}
#base-control{display:flex;align-items:center;justify-content:space-between;margin:8px 0 12px;font-size:12px;color:var(--muted)}#base-mode{font:inherit;color:var(--text);background:#14272c;border:1px solid #45636a;border-radius:4px;padding:6px}
#angle-row{border-top:1px solid var(--line);margin-top:12px;padding-top:12px;font-size:12px}#angle-value{float:right}#base-angle{width:100%;margin:12px 0 3px}
.view-tools{position:absolute;right:16px;bottom:42px;display:flex;gap:3px}.view-tools button{padding:4px 9px;background:#102126cc;color:var(--muted);font-size:16px}
.presets svg{max-width:100%}
@media(min-width:701px){
 html{height:100%;overflow:hidden}
 body{height:100dvh;display:flex;flex-direction:column;overflow:hidden}
 header{width:100%;flex:none;padding:14px 28px}
 main{width:100%;flex:1;min-height:0;display:flex;flex-direction:column;padding:12px 28px 0}
 nav{flex:none}nav button{padding:9px 15px}
 .intro{flex:none;padding:13px 0 17px;align-items:center}
 .eyebrow{margin-bottom:6px}h1{font-size:clamp(26px,2.2vw,36px);letter-spacing:-1px}
 .intro>p{margin:0;max-width:440px;font-size:13px}
 .workbench{flex:1;min-height:0;grid-template-columns:minmax(0,1fr) 280px}
 .stage{height:100%;min-height:0}
 aside{min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:17px 20px;scrollbar-width:thin;scrollbar-color:#45636a transparent}
 .presets{margin:10px 0 15px}.presets button{height:43px}
 #zone-select{margin-bottom:12px}
 .result{padding-top:13px;margin-top:5px}.metric{margin:5px 0}.metric strong{font-size:32px}
 #status{min-height:20px}.coordinates{margin:9px 0 15px}
 .primary{padding:10px}.quiet{margin:8px 0;font-size:10px}
 details{margin-top:12px}.utilities{padding-top:8px;margin-top:12px}
 footer{flex:none;padding:10px 0;font-size:10px}
}
@media(min-width:701px) and (max-height:740px){
 header{padding-top:10px;padding-bottom:10px}.intro{padding:9px 0 11px}
 .intro .eyebrow{display:none}h1{font-size:27px}
 aside{padding:12px 17px}.presets{margin:7px 0 10px}.presets button{height:34px}
 .result{padding-top:8px}.metric strong{font-size:27px}.coordinates{margin:5px 0 10px}
 details{margin-top:7px}.utilities{margin-top:8px;padding-top:5px}
}
@media(min-width:701px) and (max-width:1000px){
 header{padding-left:18px;padding-right:18px}main{padding-left:18px;padding-right:18px}
 .workbench{grid-template-columns:minmax(0,1fr) 240px}.intro>p{max-width:270px;font-size:12px}
}
@media(min-width:701px) and (max-height:560px){
 header{padding-top:6px;padding-bottom:6px}main{padding-top:6px}
 nav button{padding-top:6px;padding-bottom:6px}.intro{padding:6px 0 9px}h1{font-size:22px}
 footer{padding:5px 0}.stage-top{top:12px}.stage-bottom{bottom:12px}
}