@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@600;700&family=DM+Sans:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');
:root{color-scheme:dark;--bg:#090e17;--panel:#101927;--raised:#182437;--line:#28364b;--fg:#eaf1fc;--muted:#a0b0c7;--app-accent:#77e4c4;--danger:#ff8f9c;--font:'DM Sans',system-ui,sans-serif;--display:'Barlow Condensed','Arial Narrow',sans-serif;--mono:'JetBrains Mono',monospace}
:root[data-theme=light]{color-scheme:light;--bg:#eef2f6;--panel:#fff;--raised:#e6edf4;--line:#c5d1df;--fg:#17273a;--muted:#52647a;--danger:#a6213b}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font);font-size:15px;line-height:1.6}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:var(--fg);background:var(--raised);border:1px solid var(--line);border-radius:9px;min-height:44px;padding:9px 15px;font-weight:600;font-size:13px;transition:background .15s,border-color .15s}button:hover{border-color:var(--app-accent);background:color-mix(in srgb,var(--app-accent) 10%,var(--raised))}button.primary{color:#07131e;background:var(--app-accent);border-color:transparent}button.active,button[aria-pressed=true]{border-color:var(--app-accent);background:color-mix(in srgb,var(--app-accent) 16%,var(--panel))}button.primary.active,button.primary[aria-pressed=true]{color:var(--fg)}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,canvas:focus-visible{outline:2px solid var(--app-accent);outline-offset:4px}a{color:inherit;text-underline-offset:4px}h1,h2,h3,p{margin:0}h1{font:700 clamp(42px,5.8vw,78px)/1.02 var(--display);letter-spacing:-.02em}h2{font:600 26px/1.15 var(--display)}h3{font-size:16px;line-height:1.4}button svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7}input[type=range]{width:100%;min-height:44px;accent-color:var(--app-accent);cursor:pointer}input[type=number],input[type=text],input[type=color],select,textarea{width:100%;min-width:0;min-height:44px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--fg);padding:9px 11px;font-size:16px}input[type=color]{padding:4px;cursor:pointer}textarea{resize:vertical;font-family:var(--mono);font-size:13px;line-height:1.7}select{cursor:pointer}output{font:500 12px var(--mono);color:var(--app-accent);white-space:nowrap}label{display:block;font-size:13px;color:var(--muted)}[hidden]{display:none!important}.sr-only,.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:15px;top:-80px;z-index:100;background:var(--app-accent);color:#08121a;padding:12px 20px;border-radius:8px}.skip-link:focus{top:10px}
.app-header{min-height:76px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:18px;padding:15px max(24px,calc((100vw - 1440px)/2));background:var(--bg)}.app-header a{text-decoration:none;font-size:13px;letter-spacing:.04em;font-weight:700;display:inline-flex;align-items:center;min-height:44px;gap:10px}.app-header a:before{content:'↖';color:var(--app-accent);font-size:22px}.app-header nav,.header-actions{display:flex;align-items:center;gap:10px}.app-header .header-label{font:11px var(--mono);color:var(--muted);letter-spacing:.08em}.app-header [data-theme-toggle]{width:44px;padding:0;font-size:20px}.app-main{max-width:1440px;margin:auto;padding:38px 24px 44px}.app-intro{margin-bottom:27px;max-width:970px}.eyebrow{font:500 11px var(--mono);letter-spacing:.13em;text-transform:uppercase;color:var(--app-accent);margin-bottom:13px}.app-intro>p:last-child{color:var(--muted);font-size:15px;max-width:720px;margin-top:13px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:22px;align-items:start}.stage-card{min-width:0;overflow:hidden;background:var(--panel);border:1px solid var(--line);border-radius:17px;position:relative}.stage-toolbar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;padding:14px 18px;border-bottom:1px solid var(--line)}.stage-toolbar p,.stage-toolbar .readout{color:var(--muted);font-size:12px}.stage-toolbar .eyebrow{margin:0}.stage-card canvas{display:block;width:100%;max-width:100%}.canvas-wrap{position:relative;min-width:0;background:#080f1c}.stage-caption{padding:13px 18px;color:var(--muted);font-size:12px;border-top:1px solid var(--line)}.controls{display:grid;gap:16px;min-width:0}.control-section{border:1px solid var(--line);border-radius:14px;padding:20px;background:var(--panel);min-width:0}.control-section h2{font-size:23px;margin-bottom:15px}.control-section h3{margin-bottom:12px}.control-section>p{font-size:12px;color:var(--muted);margin-top:10px}.field{margin-top:16px}.field:first-child{margin-top:0}.field>span,.field>label,.field>p{margin-bottom:7px;display:block}.range-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:5px}.range-row label{color:var(--fg)}.button-row{display:flex;flex-wrap:wrap;gap:8px}.button-row>*{flex:1 1 auto}.button-row.compact>*{flex:0 0 auto}.control-section .button-row{margin-top:12px}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:1px;background:var(--line);border-top:1px solid var(--line)}.stat{background:var(--panel);padding:14px 17px;min-width:0}.stat span,.stat small,.stat dt{display:block;color:var(--muted);font-size:11px}.stat strong,.stat b,.stat dd{display:block;font:600 25px var(--display);margin:3px 0 0;overflow-wrap:anywhere}.stat output{font-size:21px}.learn-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:24px}.learn-card{padding:22px;border:1px solid var(--line);border-radius:14px;background:color-mix(in srgb,var(--panel) 65%,var(--bg));min-width:0}.learn-card .eyebrow{font-size:10px;margin-bottom:8px}.learn-card h2,.learn-card h3{margin-bottom:10px}.learn-card p,.learn-card li{font-size:13px;color:var(--muted);line-height:1.8}.learn-card code{color:var(--app-accent);font-size:12px}.learn-card a{color:var(--fg)}.learn-card ul{padding-left:18px}.status{font-size:12px;color:var(--muted);min-height:22px;margin-top:10px}.status.error{color:var(--danger)}.badge{display:inline-block;font:10px var(--mono);padding:5px 9px;border:1px solid var(--line);border-radius:30px;color:var(--app-accent);white-space:nowrap}.app-footer{margin-top:30px;border-top:1px solid var(--line);padding-top:18px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;font-size:11px;color:var(--muted)}.app-footer a{color:var(--fg)}.tabs{display:flex;gap:5px;flex-wrap:wrap}.tabs button{font-size:12px;min-width:44px}.legend{display:flex;gap:16px;flex-wrap:wrap;font-size:11px;color:var(--muted)}.legend i{display:inline-block;width:8px;height:8px;background:var(--color,var(--app-accent));border-radius:50%;margin-right:6px}.empty-message{padding:30px;color:var(--muted);text-align:center}.app-header,.app-main{padding-left:max(20px,env(safe-area-inset-left));padding-right:max(20px,env(safe-area-inset-right))}:root[data-theme=light] output,:root[data-theme=light] .eyebrow,:root[data-theme=light] .badge{color:color-mix(in srgb,var(--app-accent) 35%,#102b43)}
@media(min-width:1480px){.app-header{padding-inline:calc((100vw - 1400px)/2)}}
@media(max-width:1050px){.workspace{grid-template-columns:minmax(0,1fr) 280px;gap:16px}.control-section{padding:17px}.learn-grid{gap:15px}.app-main{padding-top:28px}}
@media(max-width:800px){.workspace{grid-template-columns:minmax(0,1fr)}.controls{grid-template-columns:repeat(2,minmax(0,1fr))}.controls>.control-section:only-child{grid-column:1/-1}.learn-grid{grid-template-columns:minmax(0,1fr)}.app-intro{margin-bottom:22px}.app-header .header-label{display:none}.app-main{padding-inline:max(16px,env(safe-area-inset-left));padding-bottom:calc(30px + env(safe-area-inset-bottom))}.app-header{min-height:68px;padding-block:10px}.stage-toolbar{padding:12px 14px}.learn-card{padding:20px}}
@media(max-width:480px){.controls{grid-template-columns:minmax(0,1fr)}.app-main{padding-inline:12px;padding-top:24px}.app-header{padding-inline:14px}.app-header a{font-size:11px}.app-intro h1{font-size:49px}.app-intro>p:last-child{font-size:13px}.stage-toolbar{gap:8px}.stage-toolbar button{padding-inline:11px}.stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.stat{padding:11px 13px}.button-row button{font-size:12px}.stage-caption{font-size:11px}.learn-card p,.learn-card li{font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}