:root{--gold:#F3B85D;--sun-glow:rgb(255 170 80/.10)}
*{box-sizing:border-box}
html{color-scheme:dark}
body{margin:0;background:var(--fai-bg);color:var(--fai-ink);font:400 1rem/1.6 var(--fai-body);overflow-x:hidden}
a{color:inherit}
button,input{font:inherit}
:where(a,button,input,summary,.sun-stage):focus-visible{outline:2px solid var(--fai-focus);outline-offset:4px;border-radius:4px}
em{font-style:normal;color:var(--gold)}
main{max-width:1320px;margin:0 auto;padding:0 max(16px,4vw) 48px}

.hero{display:grid;grid-template-columns:minmax(0,11fr) minmax(0,13fr);grid-template-areas:"copy sun" "console sun";column-gap:clamp(24px,4vw,64px);align-items:center;min-height:calc(100svh - var(--fai-bar-h));padding:clamp(16px,3vh,40px) 0}
.copy{grid-area:copy;align-self:end}
.eyebrow{margin:0 0 18px;font:600 .72rem/1 var(--fai-mono);letter-spacing:.18em;text-transform:uppercase;color:var(--gold)}
h1,h2{font-family:var(--fai-display);font-weight:500;margin:0;letter-spacing:-.01em}
h1{font-size:clamp(3rem,4.9vw,5.2rem);line-height:.98}
.lede{margin:22px 0 28px;max-width:34ch;color:var(--fai-ink-2);font-size:1.06rem}
.button{display:inline-flex;align-items:center;gap:14px;min-height:48px;padding:12px 20px;background:var(--fai-accent);color:var(--fai-accent-ink);font-weight:600;font-size:.95rem;text-decoration:none;border-radius:2px;transition:background .2s}
.button:hover{background:#FFB27A}

.sun{grid-area:sun;margin:0;min-width:0;position:relative}
.sun::before{content:"";position:absolute;inset:8%;border-radius:50%;background:radial-gradient(closest-side,var(--sun-glow),transparent);pointer-events:none}
.sun-stage{position:relative;width:100%;max-width:min(760px,calc(100svh - var(--fai-bar-h) - 80px));aspect-ratio:1;margin:0 auto;touch-action:pan-y;cursor:grab;border-radius:50%}
.sun-stage.dragging{cursor:grabbing;touch-action:none}
.poster,canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
canvas{opacity:0;transition:opacity .8s ease}
.sun-stage.ready canvas{opacity:1}
.sun-stage.ready .poster{opacity:0;transition:opacity .8s ease .2s}
figcaption{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:6px 14px;margin-top:6px;font:500 .74rem/1.4 var(--fai-mono);color:var(--fai-ink-2)}
.dot{width:7px;height:7px;border-radius:50%;background:var(--fai-line)}
.sun-stage.ready+figcaption .dot,figure:has(.ready) .dot{background:var(--gold);box-shadow:0 0 8px var(--gold)}
#renderer-label{color:var(--fai-ink)}

.console{grid-area:console;align-self:start;display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px 18px;align-items:center;margin-top:36px;padding:18px 0 0;border-top:1px solid var(--fai-line);max-width:440px}
.console label{display:flex;justify-content:space-between;gap:12px;font:500 .78rem/1 var(--fai-mono);color:var(--fai-ink-2);min-width:9.5em}
.console output{color:var(--fai-ink)}
input[type=range]{width:100%;height:32px;margin:0;background:transparent;accent-color:var(--fai-accent);cursor:pointer}
input[type=range]:disabled{opacity:.45;cursor:not-allowed}
.buttons{grid-column:1/-1;display:flex;gap:10px;margin-top:4px}
button{min-height:44px;padding:8px 16px;background:transparent;color:var(--fai-ink);border:1px solid var(--fai-line);border-radius:2px;cursor:pointer;font:500 .82rem/1 var(--fai-mono);transition:border-color .2s,color .2s}
button:hover:not(:disabled){border-color:var(--fai-accent);color:var(--fai-accent)}
button:disabled{opacity:.5;cursor:not-allowed}
button[aria-pressed=true]{border-color:var(--gold);color:var(--gold)}

.signal{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:20px 32px;align-items:center;padding:36px 0;border-top:1px solid var(--fai-line)}
h2{font-size:clamp(1.8rem,3vw,2.6rem);line-height:1.05;grid-column:1/-1}
.signal-path{display:flex;flex-wrap:wrap;gap:10px;margin:0;padding:0;list-style:none;counter-reset:s}
.signal-path li{counter-increment:s;padding:10px 14px;border:1px solid var(--fai-line);border-radius:2px;color:var(--fai-ink-2);font-size:.92rem;transition:border-color .3s,color .3s,background .3s}
.signal-path li::before{content:"0" counter(s) " ";font:600 .72rem var(--fai-mono);color:var(--fai-ink-2)}
.signal-path b{color:var(--fai-ink);font-weight:600}
.signal-path li.active{border-color:var(--gold);color:var(--fai-ink);background:rgb(243 184 93/.08)}
.pulse{border-color:var(--gold);color:var(--gold)}
#pulse-status{grid-column:1/-1;margin:0;font:500 .78rem/1.5 var(--fai-mono);color:var(--fai-ink-2)}

.tech{border-top:1px solid var(--fai-line);padding:4px 0}
.tech summary{min-height:44px;display:flex;align-items:center;cursor:pointer;font:500 .85rem/1 var(--fai-mono);color:var(--fai-ink-2)}
.tech summary:hover{color:var(--fai-ink)}
.tech ul{margin:4px 0 16px;padding-left:1.2em;color:var(--fai-ink-2);font-size:.92rem;max-width:72ch}
.honest{margin:20px 0 0;font:400 .76rem/1.5 var(--fai-mono);color:var(--fai-ink-2)}

@media (max-width:860px){
  .hero{grid-template-columns:minmax(0,1fr);grid-template-areas:"copy" "sun" "console";min-height:0;row-gap:8px}
  .copy{align-self:start;padding-top:12px}
  .sun-stage{max-width:520px}
  .console{max-width:none;margin-top:12px}
  .signal{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:420px){.lede{margin:16px 0 22px}.console{grid-template-columns:minmax(0,1fr);gap:4px}.console label{min-width:0}.buttons button{flex:1}}
@media (prefers-reduced-motion:reduce){canvas,.sun-stage.ready .poster,.signal-path li,button,.button{transition:none}}