/* Drift — one stylesheet, no framework.
   Red belongs to the result and to nothing else, so every control and every
   surface stays quiet enough for it to read as signal. */

:root{
  --bg:#f4f5f6; --panel:#fff; --ink:#11161a; --muted:#69737b;
  --line:#dde2e6; --line2:#eef1f3;
  --accent:#e5484d; --accent-soft:#fdeced;
  --ok:#2f7d5b; --stage:#1a2026;
  --r:10px;
  --sans:"Space Grotesk",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme=light]){
    --bg:#0e1114; --panel:#161b20; --ink:#e8edf0; --muted:#92a0a9;
    --line:#262e35; --line2:#1d242a; --accent:#ff6369; --accent-soft:#2a1719;
    --ok:#5dba8c; --stage:#0a0d10;
  }
}
:root[data-theme=dark]{
  --bg:#0e1114; --panel:#161b20; --ink:#e8edf0; --muted:#92a0a9;
  --line:#262e35; --line2:#1d242a; --accent:#ff6369; --accent-soft:#2a1719;
  --ok:#5dba8c; --stage:#0a0d10;
}

*{box-sizing:border-box}
/* The browser's own [hidden] rule is a bare attribute selector, so any class
   that sets `display` silently outranks it and the element stays on screen.
   .thumb and .busy both did exactly that; dark mode hid the evidence because
   the stray blocks matched the panel behind them. */
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 var(--sans);
  overflow-x:hidden;-webkit-font-smoothing:antialiased}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
a{color:inherit}
.num,b{font-variant-numeric:tabular-nums}

/* ---- chrome ---- */
.top{border-bottom:1px solid var(--line);background:var(--panel);position:sticky;top:0;z-index:20}
.top .row{display:flex;align-items:center;justify-content:space-between;height:58px}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:18px;
  letter-spacing:-.02em;text-decoration:none}
.brand svg{flex:none}
.top nav{display:flex;gap:20px;font-size:14.5px}
.top nav a{color:var(--muted);text-decoration:none}
.top nav a:hover{color:var(--ink)}
/* Sits with the nav links rather than floating: it is a setting, not an action. */
.themeBtn{display:grid;place-items:center;width:32px;height:32px;padding:0;margin:-5px 0;
  border:1px solid var(--line);border-radius:8px;background:var(--panel);
  color:var(--muted);cursor:pointer;transition:color .15s,border-color .15s}
.themeBtn:hover{color:var(--ink);border-color:var(--muted)}
.themeBtn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ---- hero ---- */
.hero{padding:52px 0 30px;max-width:40ch}
.hero h1{font-size:clamp(34px,5.6vw,52px);line-height:1.04;letter-spacing:-.035em;
  font-weight:700;margin:0 0 16px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p{margin:0 0 8px;font-size:17.5px;color:var(--muted);max-width:52ch}
.privacy{font-size:14.5px !important;color:var(--ok) !important}

/* ---- drop zones ---- */
.drops{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:14px 0 0}
.drop{position:relative;border:1.5px dashed var(--line);border-radius:var(--r);
  background:var(--panel);min-height:190px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:10px;cursor:pointer;
  transition:border-color .15s,background .15s;overflow:hidden;padding:18px}
.drop:hover,.drop:focus-visible{border-color:var(--accent);outline:none}
.drop.over{border-color:var(--accent);background:var(--accent-soft)}
.drop.has{border-style:solid;border-color:var(--line);padding:0}
.slot{position:absolute;top:10px;left:12px;font:600 12px var(--mono);color:var(--muted);
  background:var(--panel);border:1px solid var(--line);border-radius:5px;
  width:22px;height:22px;display:grid;place-items:center;z-index:2}
.thumb{display:block;width:100%;height:190px;object-fit:contain;background:var(--stage)}
.dropText{text-align:center;line-height:1.35}
.dropText strong{display:block;font-size:15px;font-weight:600}
.dropText span{display:block;font-size:13.5px;color:var(--muted)}
.drop.has .dropText{position:absolute;bottom:0;left:0;right:0;background:rgba(10,13,16,.78);
  color:#fff;padding:7px;backdrop-filter:blur(3px)}
.drop.has .dropText span{color:#b9c4cb}

.tryLine{font-size:14.5px;color:var(--muted);margin:14px 0 0}
.tryLine a{color:var(--accent);text-decoration:none;font-weight:500}
.tryLine a:hover{text-decoration:underline}

/* ---- readout ---- */
.result{margin:34px 0 0}
.readout{display:grid;grid-template-columns:repeat(auto-fit,minmax(118px,1fr));
  gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);
  overflow:hidden}
.cell{background:var(--panel);padding:13px 14px}
.cell span{display:block;font-size:11.5px;letter-spacing:.03em;color:var(--muted);margin-bottom:3px}
.cell b{font:500 21px/1.1 var(--mono);letter-spacing:-.02em}
.cell b.accent{color:var(--accent)}
.verdict{margin:14px 0 0;font-size:15.5px}
.verdict.warn{color:var(--accent)}

/* ---- viewer ---- */
.viewer{margin:18px 0 0;border:1px solid var(--line);border-radius:var(--r);
  overflow:hidden;background:var(--panel)}
.tabs{display:flex;gap:0;border-bottom:1px solid var(--line);background:var(--line2)}
.tab{appearance:none;border:0;background:none;font:500 14px var(--sans);color:var(--muted);
  padding:11px 16px;cursor:pointer;border-bottom:2px solid transparent}
.tab:hover{color:var(--ink)}
.tab.is-on{color:var(--ink);border-bottom-color:var(--accent);background:var(--panel)}
.stage{background:var(--stage);display:grid;place-items:center;padding:16px;position:relative}
#out{max-width:100%;height:auto;display:block;border-radius:4px}
#swipe{position:absolute;left:16px;right:16px;bottom:12px;width:calc(100% - 32px);accent-color:var(--accent)}

/* ---- controls ---- */
.controls{display:grid;grid-template-columns:1fr 1fr auto;gap:18px;align-items:start;
  margin:16px 0 0;padding:16px;border:1px solid var(--line);border-radius:var(--r);
  background:var(--panel)}
.ctl span{display:block;font-size:13.5px;font-weight:500;margin-bottom:6px}
.ctl small{display:block;font-weight:400;color:var(--muted);font-size:12.5px}
.ctl input[type=range]{width:100%;accent-color:var(--accent)}
.ctl.check{display:flex;gap:9px;align-items:flex-start}
.ctl.check input{margin-top:3px;accent-color:var(--accent);width:16px;height:16px}
.ctl.check span{margin:0}
.actions{display:flex;gap:8px;align-self:center}
.btn{appearance:none;font:500 14px var(--sans);padding:9px 15px;border-radius:7px;
  border:1px solid var(--accent);background:var(--accent);color:#fff;cursor:pointer;white-space:nowrap}
.btn:hover{filter:brightness(1.07)}
.btn.ghost{background:none;color:var(--muted);border-color:var(--line)}
.btn.ghost:hover{color:var(--ink);border-color:var(--muted);filter:none}

/* ---- busy ---- */
.busy{display:flex;align-items:center;gap:13px;margin:30px 0;color:var(--muted);font-size:15px}
.spinner{width:19px;height:19px;border:2px solid var(--line);border-top-color:var(--accent);
  border-radius:50%;animation:spin .7s linear infinite;flex:none}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---- how ---- */
.how{margin:64px 0 0;padding-top:30px;border-top:1px solid var(--line)}
.how h2{font-size:23px;letter-spacing:-.02em;margin:0 0 18px;font-weight:600}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.steps h3{font:500 14px var(--mono);color:var(--accent);margin:0 0 7px;letter-spacing:-.01em}
.steps p{margin:0;font-size:14.5px;color:var(--muted);line-height:1.6}

/* ---- examples page ---- */
.exGrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px;margin:8px 0 0}
.ex{border:1px solid var(--line);border-radius:var(--r);background:var(--panel);overflow:hidden;
  display:flex;flex-direction:column}
.exPair{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line)}
.exPair img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block;background:var(--stage)}
.exBody{padding:14px 15px;display:flex;flex-direction:column;gap:7px;flex:1}
.exBody h3{margin:0;font-size:16.5px;font-weight:600;letter-spacing:-.01em}
.exBody p{margin:0;font-size:14px;color:var(--muted);line-height:1.5;flex:1}
.truth{font:400 12.5px var(--mono);color:var(--muted);background:var(--line2);
  border-radius:6px;padding:7px 9px}
.truth b{color:var(--ink);font-weight:500}
.ex .btn{align-self:flex-start;text-decoration:none;display:inline-block}
.lede{font-size:17px;color:var(--muted);max-width:60ch;margin:0 0 26px}

/* ---- footer ---- */
.foot{margin:70px 0 0;border-top:1px solid var(--line);background:var(--panel);
  padding:24px 0 34px;font-size:14px;color:var(--muted)}
.foot p{margin:0 0 7px}
.foot a{color:var(--muted)}
.foot a:hover{color:var(--ink)}
.foot .links{display:flex;gap:16px;flex-wrap:wrap}

@media (max-width:760px){
  .hero{padding:34px 0 22px}
  .drops{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;gap:20px}
  .controls{grid-template-columns:1fr;gap:16px}
  .actions{align-self:stretch}
  .btn{flex:1}
  .tab{padding:10px 12px;font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  .spinner{animation-duration:2s}
  *{transition:none !important}
}

/* ---- support link ----
   A quiet outline button rather than a plain link: visible enough to be found,
   restrained enough that it never competes with the result. */
.coffee{display:inline-flex;align-items:center;gap:8px;margin-top:4px;
  padding:8px 15px;border:1px solid var(--line);border-radius:999px;
  background:var(--panel);color:var(--muted);text-decoration:none;
  font-size:14px;font-weight:500;transition:color .15s,border-color .15s}
.coffee:hover{color:var(--accent);border-color:var(--accent)}
.coffee:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ---- theme switch ---- */
@media (prefers-reduced-motion:no-preference){
  body,.top,.drop,.panel,.viewer,.stage,.ctl,.ex,.foot{
    transition:background-color .18s ease,border-color .18s ease,color .18s ease}
}