:root{color-scheme:light;--brand:#22a9f8;--brand-deep:#01017c;--brand-soft:#edf8ff;--line:#d5e5f3;--muted:#4c6584;--font:system-ui,-apple-system,"Segoe UI",sans-serif}
*{box-sizing:border-box}
body{margin:0;background:#fff;color:var(--brand-deep);font-family:var(--font);font-size:15px;line-height:1.6}
button,input,summary{font:inherit}
button,summary,label{ -webkit-tap-highlight-color:transparent}
button{cursor:pointer}
[hidden]{display:none!important}
.comparison{max-width:960px;margin:auto;padding:28px;border:1px solid var(--line);border-radius:24px;background:linear-gradient(145deg,var(--brand-soft),#fff 28%)}
.intro .eyebrow{display:flex;gap:9px;align-items:center;font-size:11px;font-weight:750;letter-spacing:.13em;text-transform:uppercase}
.color-mark{width:18px;height:18px;border-radius:50%;background:conic-gradient(#357bc3,#9563bf,#d06464,#d8bb58,#7b9b5b,#357bc3);box-shadow:inset 0 0 0 4px #ffffff9c}
h1{font-size:clamp(23px,3.5vw,32px);letter-spacing:-.035em;line-height:1.18;margin:12px 0 8px;font-weight:740}
.intro p{color:var(--muted);margin:0;font-size:15px}
.profiles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;border:0;padding:0;margin:24px 0 22px}
.profiles>*{min-width:0}
.profiles label{position:relative;cursor:pointer}
.profiles input{position:absolute;opacity:0;width:1px;height:1px}
.profiles label>span{display:block;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;transition:background .16s,border-color .16s}
.profiles strong{display:block;font-size:14px;letter-spacing:-.02em}
.profiles small{display:block;color:var(--muted);font-size:12px;margin-top:2px}
.profiles input:checked+span{border-color:var(--brand-deep);background:var(--brand-deep);color:#fff;box-shadow:0 4px 12px #01017c14}
.profiles input:checked+span small{color:#e0f2ff}
.profiles input:focus-visible+span,button:focus-visible,summary:focus-visible,.chart-aid input:focus-visible+.switch{outline:3px solid var(--brand-deep);outline-offset:4px}
.scene-row{display:flex;gap:12px;justify-content:space-between;align-items:center;margin-bottom:12px}
.scene-picker{display:flex;padding:3px;background:#f1f5fa;border-radius:10px;gap:3px}
.scene-picker button{border:0;border-radius:7px;background:transparent;color:var(--muted);padding:8px 13px;font-size:13px;font-weight:650;min-height:40px}
.scene-picker button[aria-pressed=true]{background:#fff;color:var(--brand-deep);box-shadow:0 1px 5px #16335b14}
.scene-hint{font-size:12px;color:var(--muted)}
.scene-hint span{margin-left:4px;font-size:19px}
.stage{position:relative;aspect-ratio:16/9;isolation:isolate;border-radius:16px;background:#f6f5f2;overflow:hidden}
.stage canvas,.base-image{display:block;width:100%;height:100%;object-fit:cover}
.stage canvas{position:absolute;inset:0}
.simulated{clip-path:inset(0 0 0 var(--split))}
.stage-label{position:absolute;top:14px;z-index:2;border:1px solid #ffffff8c;border-radius:6px;padding:5px 10px;background:#fffffff0;color:var(--brand-deep);font-size:11px;font-weight:700;letter-spacing:.02em;pointer-events:none;box-shadow:0 2px 8px #1a315c0a}
.original-label{left:14px}
.simulation-label{right:14px;background:var(--brand-deep);color:#fff;border-color:#ffffff52}
.divider{position:absolute;inset-block:0;left:var(--split);width:2px;background:#fff;box-shadow:0 0 0 1px #01017c24;transform:translateX(-50%);z-index:3;pointer-events:none}
.divider>span{display:flex;gap:7px;align-items:center;justify-content:center;position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);border:3px solid #fff;width:48px;height:48px;border-radius:50%;background:var(--brand-deep);color:#fff;font-size:25px;line-height:1;box-shadow:0 3px 18px #01017c33}
.divider i{width:1px;height:14px;background:#ffffff70}
.comparison-range{position:absolute;inset:0;z-index:4;margin:0;width:100%;height:100%;opacity:0;cursor:ew-resize;touch-action:pan-y}
.stage.focused{outline:3px solid var(--brand-deep);outline-offset:4px}
.stage.focused .divider>span{box-shadow:0 0 0 4px var(--brand-deep)}
.view-controls{display:flex;justify-content:center;gap:4px;margin:12px 0 18px}
.view-controls button{border:1px solid transparent;border-radius:7px;background:transparent;color:var(--muted);padding:6px 12px;font-size:12px;min-height:40px}
.view-controls button[aria-pressed=true]{border-color:var(--line);background:var(--brand-soft);color:var(--brand-deep);font-weight:650}
.chart-aid{display:flex;gap:10px;align-items:center;font-size:13px;cursor:pointer;padding:0 0 18px;width:fit-content;min-height:44px}
.chart-aid input{position:absolute;opacity:0;width:1px;height:1px}
.switch{flex:0 0 36px;height:22px;background:#bbc9d9;border-radius:22px;padding:3px;transition:background .15s}
.switch:after{content:"";display:block;height:16px;width:16px;border-radius:50%;background:white;transition:transform .15s}
.chart-aid input:checked+.switch{background:var(--brand-deep)}
.chart-aid input:checked+.switch:after{transform:translateX(14px)}
.observation{display:flex;align-items:flex-start;gap:12px;border-top:1px solid var(--line);padding-top:18px}
.observation-icon{flex:none;font-size:24px;color:var(--brand);line-height:1.3}
.observation p{margin:0;font-size:14px;line-height:1.65}
.notes{margin-top:17px;color:var(--muted);font-size:12px;line-height:1.6}
.notes p{margin:0 0 10px}
.notes strong{font-weight:700}
summary{cursor:pointer;width:fit-content;color:var(--brand-deep);font-size:12px;padding:5px 0;min-height:32px}
.notes details[open] summary{margin-bottom:8px}
a{color:var(--brand-deep);text-decoration-thickness:1px;text-underline-offset:3px}
.load-error{color:var(--muted);font-size:13px;padding:12px;background:var(--brand-soft);border-radius:8px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:540px){.comparison{padding:18px 14px;border-radius:18px}.intro p{font-size:14px}.profiles{gap:5px;margin:20px 0 17px}.profiles label>span{padding:10px 6px;text-align:center;border-radius:9px}.profiles strong{font-size:12px}.profiles small{font-size:10px}.scene-hint{display:none}.scene-picker{width:100%}.scene-picker button{flex:1}.stage{border-radius:11px}.stage-label{top:9px;padding:3px 7px;font-size:10px}.original-label{left:9px}.simulation-label{right:9px}.divider>span{width:42px;height:42px;border-width:2px}.view-controls{gap:0}.view-controls button{padding:6px 10px}.observation p{font-size:13px}.notes{font-size:11px}.chart-aid{font-size:12px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}
@media(max-width:380px){.profiles{grid-template-columns:minmax(0,1fr);gap:5px}.profiles label>span{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:9px 12px;text-align:left;min-height:44px}.profiles strong{font-size:13px}.profiles small{font-size:11px;margin:0;white-space:nowrap}}