:root{
  --paper:#eef1ec; --panel:#ffffff; --ink:#0f1e1a; --muted:#56645e; --line:#d3dad4;
  --gold:#f5b800; --real:#17803d; --ai:#c4161c; --warn:#9a6700; --warnbg:#fff7dc;
  --font:"Bricolage Grotesque",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
@media (prefers-color-scheme: dark){
  :root{
    --paper:#0c1512; --panel:#131f1b; --ink:#eef3ef; --muted:#9db0a8; --line:#26352f;
    --gold:#f5b800; --real:#4cc27a; --ai:#ff6b6b; --warn:#f5b800; --warnbg:#251d06;
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:400 1.0625rem/1.6 var(--font)}
a{color:inherit}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px}

.top{max-width:1100px;margin:0 auto;padding:20px 20px 0;display:flex;justify-content:space-between;align-items:center}
.mark{display:inline-flex;align-items:center;gap:8px;font-weight:800;font-size:1.25rem;letter-spacing:-.02em;text-decoration:none}
.dot{width:12px;height:12px;border-radius:50%;background:var(--gold)}
.toplink{font-size:.95rem;color:var(--muted);text-underline-offset:4px}

main{max-width:1100px;margin:0 auto;padding:0 20px}
.banner{background:var(--warnbg);color:var(--warn);border:1px solid var(--warn);border-radius:10px;padding:10px 14px;margin:20px 0 0}

.hero{display:grid;grid-template-columns:1fr;gap:36px;padding:44px 0 56px}
h1{font-weight:800;font-size:clamp(2.7rem,9vw,5.2rem);line-height:.98;letter-spacing:-.035em;margin:0 0 20px}
.lead{font-size:clamp(1.1rem,2.6vw,1.3rem);line-height:1.5;margin:0 0 20px;max-width:34ch}
.privacy{display:flex;gap:10px;align-items:flex-start;color:var(--muted);font-size:.98rem;margin:0;max-width:40ch}
.privacy svg{flex:none;margin-top:3px}

/* The viewfinder: the whole upload area is a camera frame. */
.frame{position:relative;background:var(--panel);aspect-ratio:4/3;display:grid;place-items:center;border-radius:4px;overflow:hidden}
.frame .c{position:absolute;width:34px;height:34px;border:0 solid var(--gold);pointer-events:none;z-index:3}
.c.tl{top:12px;left:12px;border-top-width:5px;border-left-width:5px}
.c.tr{top:12px;right:12px;border-top-width:5px;border-right-width:5px}
.c.bl{bottom:12px;left:12px;border-bottom-width:5px;border-left-width:5px}
.c.br{bottom:12px;right:12px;border-bottom-width:5px;border-right-width:5px}

#drop{position:absolute;inset:0;z-index:2;display:grid;place-items:center;padding:28px;text-align:center;cursor:pointer;font-weight:600;font-size:1.2rem;letter-spacing:-.01em}
#drop:hover #droptext,#drop.over #droptext{background:var(--gold);color:#0f1e1a;border-color:var(--gold)}
#droptext{border:2px solid var(--ink);padding:14px 22px;border-radius:999px;transition:background .15s,border-color .15s}
#file{display:none}
#preview{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:var(--panel);z-index:1;pointer-events:none}
#preview:not([hidden])+#drop{align-items:end;justify-items:center}
#preview:not([hidden])+#drop #droptext{background:var(--panel);font-size:.95rem;padding:8px 16px;margin-bottom:6px;white-space:nowrap}

.loading .loadbody{width:min(86%,420px);text-align:center}
.loading p{margin:0 0 16px;color:var(--muted)}
.bar{height:8px;background:var(--line);border-radius:999px;overflow:hidden}
.bar>div{height:100%;width:0;background:var(--gold);transition:width .2s}

/* Result */
#result{margin-top:26px}
#verdict{font-weight:800;font-size:clamp(2rem,6vw,2.8rem);letter-spacing:-.03em;line-height:1.05;margin:0 0 6px}
#verdict.real{color:var(--real)} #verdict.ai{color:var(--ai)} #verdict.unsure{color:var(--warn)}
#prob{margin:0 0 18px;color:var(--muted)}
.bar.big{height:12px;overflow:visible;position:relative;background:linear-gradient(90deg,var(--real),var(--gold) 50%,var(--ai));border-radius:999px}
.bar.big #probbar{background:transparent;position:relative;border-radius:999px;transition:width .5s ease}
.bar.big #probbar::after{content:"";position:absolute;right:-11px;top:50%;width:22px;height:22px;margin-top:-11px;border-radius:50%;background:var(--panel);border:4px solid var(--ink)}
#thrmark{position:absolute;top:-5px;bottom:-5px;width:2px;background:var(--ink);opacity:.45}
.scale{display:flex;justify-content:space-between;font-size:.9rem;color:var(--muted);margin:10px 0 0}
#notes{padding-left:20px;color:var(--muted);margin:16px 0 0}
#notes li{margin:4px 0}
.error{color:var(--ai);font-weight:600;margin:16px 0 0}

/* Content sections */
.how,.limits{padding:44px 0;border-top:1px solid var(--line)}
h2{font-weight:800;font-size:1.7rem;letter-spacing:-.025em;line-height:1.15;margin:0 0 20px}
#verdict{margin:0 0 6px}
.how ol{list-style:none;counter-reset:s;padding:0;margin:0;display:grid;gap:22px}
.how li{counter-increment:s;position:relative;padding-left:56px;max-width:60ch}
.how li::before{content:counter(s);position:absolute;left:0;top:-3px;width:38px;height:38px;border-radius:50%;background:var(--gold);color:#0f1e1a;font-weight:800;display:grid;place-items:center}
.limits p{max-width:60ch;margin:0 0 16px}
.limits ul{margin:0;padding:0;list-style:none;display:grid;gap:10px;max-width:60ch}
.limits li{padding-left:18px;border-left:4px solid var(--gold);color:var(--muted)}

footer{max-width:1100px;margin:0 auto;padding:28px 20px 48px;border-top:1px solid var(--line);color:var(--muted);font-size:.95rem}
footer p{margin:0;max-width:60ch}

@media (min-width:860px){
  .hero{grid-template-columns:1fr 1.05fr;align-items:center;gap:64px;padding:72px 0 80px}
  .how ol{grid-template-columns:repeat(3,1fr);gap:36px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .bar>div,.bar.big #probbar,#droptext{transition:none}
}
[hidden]{display:none !important}