:root{--bg:#fff;--fg:#16181d;--muted:#555b66;--line:#d9dce2;--card:#f6f7f9;--accent:#1f5fd6;--accent-fg:#fff;--pass:#13734a;--warn:#8a5a00;--fail:#b3261e;--radius:12px;--max:1080px}
@media (prefers-color-scheme:dark){:root{--bg:#121417;--fg:#eceef2;--muted:#a9afba;--line:#2c3038;--card:#1b1e23;--accent:#7aa7ff;--accent-fg:#0b1020;--pass:#5fd39b;--warn:#f2c14e;--fail:#ff8a80}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--fg)}
a{color:var(--accent)}a:focus-visible,button:focus-visible,input:focus-visible,label:focus-within,summary:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:var(--bg);padding:8px;z-index:9}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
header.site{border-bottom:1px solid var(--line)}header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px;flex-wrap:wrap}
.brand{font-weight:800;font-size:1.1rem;text-decoration:none;color:var(--fg)}nav a{margin-left:14px;text-decoration:none;display:inline-block;padding:10px 0}
h1{font-size:clamp(1.6rem,4.5vw,2.4rem);line-height:1.15;margin:20px 0 6px}h2{font-size:1.35rem;margin:0 0 8px}h3{font-size:1.05rem;margin:14px 0 6px}
.lead{color:var(--muted);margin:0 0 14px;font-size:1.05rem}
.privacy-note::before{content:"🔒";speak:never}.privacy-note{display:inline-flex;gap:6px;align-items:center;font-size:.95rem;color:var(--fg);background:var(--card);border:1px solid var(--line);border-radius:999px;padding:4px 12px;margin:0 0 14px}
.drop{border:2px dashed var(--line);border-radius:var(--radius);padding:22px 16px;text-align:center;background:var(--card);transition:border-color .15s}
.drop.over{border-color:var(--accent)}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 20px;border-radius:10px;border:0;background:var(--accent);color:var(--accent-fg);font:inherit;font-weight:700;cursor:pointer;text-decoration:none}
.btn.secondary{background:transparent;color:var(--accent);border:2px solid var(--accent)}
.drop .row{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:6px}
.drop p{margin:6px 0;color:var(--muted)}
.vh{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
#results{margin:22px 0 40px}#results[hidden]{display:none}
.card{border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:0 0 16px;background:var(--bg)}
.card header{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;flex-wrap:wrap}
.chip{font-weight:700;font-size:.9rem;border-radius:999px;padding:3px 10px;border:2px solid currentColor;white-space:nowrap}
.chip.pass{color:var(--pass)}.chip.warn{color:var(--warn)}.chip.fail{color:var(--fail)}
.chip.pass::before{content:"✓ "}.chip.warn::before{content:"! "}.chip.fail::before{content:"✕ "}
.metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:8px;margin:10px 0;padding:0;list-style:none}
.metrics li{background:var(--card);border-radius:8px;padding:8px 10px}.metrics b{display:block;font-size:1.15rem}
.metrics span{font-size:.85rem;color:var(--muted)}
details{margin-top:8px}summary{cursor:pointer;font-weight:600;padding:6px 0}
.explain{color:var(--fg)}.explain p{margin:6px 0}.muted{color:var(--muted)}
.previews{display:flex;gap:18px;flex-wrap:wrap;align-items:flex-end;margin:10px 0}
.previews figure{margin:0}.previews figcaption{font-size:.85rem;color:var(--muted)}
canvas.true{display:block;image-rendering:auto;border-radius:4px;background:#000}
.zoomed{image-rendering:pixelated}
.overlay-wrap{position:relative;max-width:640px}.overlay-wrap canvas{width:100%;height:auto;display:block;border-radius:6px}
.toggle-row{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;flex-wrap:wrap}
.seg button{flex:1 1 auto;font:inherit;min-height:44px;padding:8px 14px;border:0;background:var(--card);color:var(--fg);cursor:pointer}
.seg button[aria-pressed=true]{background:var(--accent);color:var(--accent-fg);font-weight:700}
.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin:10px 0}
.fields label{font-size:.9rem;font-weight:600;display:block}
.fields input{width:100%;font:inherit;min-height:44px;padding:8px 10px;border-radius:8px;border:1px solid var(--line);background:var(--bg);color:var(--fg)}
/* Mock feeds */
.feed-viewport{overflow:hidden;border-radius:10px;border:1px solid var(--line)}
.feed-scale{transform-origin:0 0}
.feed{--fbg:#fff;--ffg:#0f0f0f;--fmuted:#606060;--ph:#e5e5e5;--ph2:#d4d4d4;background:var(--fbg);color:var(--ffg);font-family:Roboto,Arial,sans-serif;padding:20px}
.feed.dark{--fbg:#0f0f0f;--ffg:#f1f1f1;--fmuted:#aaa;--ph:#272727;--ph2:#3a3a3a}
.feed .topbar{display:flex;align-items:center;gap:16px;margin:-4px 0 18px}.feed .topbar .menu{width:24px;height:16px;border-top:3px solid var(--ph2);border-bottom:3px solid var(--ph2);position:relative}
.feed .topbar .search{flex:1;max-width:520px;height:38px;border-radius:20px;border:1px solid var(--ph2);margin:0 auto}.feed .topbar .av{width:32px;height:32px;border-radius:50%;background:var(--ph2)}
.vthumb{position:relative;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:var(--ph)}
.vthumb img{width:100%;height:100%;object-fit:contain;background:#000;display:block}
.dur{position:absolute;right:6px;bottom:6px;background:rgba(0,0,0,.8);color:#fff;font:500 12px/1 Roboto,Arial,sans-serif;padding:3px 4px;border-radius:4px}
.meta{display:flex;gap:12px;margin-top:12px}.meta .av{flex:0 0 36px;height:36px;border-radius:50%;background:var(--ph2)}
.meta .t{font-size:16px;font-weight:500;line-height:22px;margin:0 0 4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.meta .s{font-size:14px;color:var(--fmuted);line-height:20px}
.bar{height:12px;border-radius:6px;background:var(--ph2);margin:4px 0 8px}.bar.w80{width:80%}.bar.w60{width:60%}.bar.w40{width:40%}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:40px 16px}
.feed.mobile{padding:0 0 12px}.feed.mobile .topbar{padding:10px 12px;margin:0 0 8px}.feed.mobile .vthumb{border-radius:0}.feed.mobile .meta{padding:0 12px 18px}
.srow{display:flex;gap:16px;margin-bottom:16px}.srow .vthumb{flex:0 0 360px}.srow .info{flex:1;min-width:0}.srow .t{font-size:18px;line-height:26px;font-weight:400;margin:0 0 6px}
.srow .ch{display:flex;align-items:center;gap:8px;margin:10px 0;font-size:13px;color:var(--fmuted)}.srow .ch i{width:24px;height:24px;border-radius:50%;background:var(--ph2);display:inline-block}
.yours{outline:3px dashed #e8a400;outline-offset:3px}
/* Offer variants */
.kit-footer{margin-top:18px;padding-top:12px;border-top:1px solid var(--line);font-size:.95rem;color:var(--muted)}
.kit-card{border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:var(--radius);padding:16px;background:var(--card);margin:0 0 16px}
.kit-card .tip{margin:0 0 10px}.kit-card .who{font-size:.9rem;color:var(--muted);margin:8px 0 0}
.kit-banner{background:var(--card);border-bottom:1px solid var(--line);font-size:.9rem;text-align:center;padding:6px 12px}
footer.site{border-top:1px solid var(--line);margin-top:30px;padding:18px 0 30px;font-size:.9rem;color:var(--muted)}
footer.site a{margin-right:14px}
.ad-slot{margin:0 0 16px;padding-bottom:14px;border-bottom:1px solid var(--line);text-align:center;overflow:hidden}.ad-slot .ad-label{margin:0 0 4px;font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}.ad-slot iframe,.ad-slot img{max-width:100%}
.prose{max-width:720px}.prose li{margin:4px 0}
.err{color:var(--fail);font-weight:600}
@media (max-width:600px){nav a{margin-left:10px}.card{padding:12px}.srow .vthumb{flex-basis:360px}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
.summary{list-style:none;padding:0;margin:8px 0 12px;display:flex;flex-wrap:wrap;gap:8px}.summary li{display:flex;align-items:center;gap:8px;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:6px 10px;min-height:44px}