:root{
  --ground:#ECEEF1; --surface:#FFFFFF; --surface-2:#F5F6F8; --ink:#14161A; --muted:#5C636E;
  --line:#D7DBE0; --line-strong:#AEB5BE; --pad-off:#DDE1E6; --btn:#14161A; --btn-ink:#FFFFFF;
  --t1:#EE5044; --t2:#F09E1C; --t3:#14A893; --t4:#626CEB;
  --ok:#15804A; --ok-bg:#E2F3E9; --warn:#9A6200; --warn-bg:#FBEFD6; --fail:#C22F2C; --fail-bg:#FBE3E2;
  --focus:#626CEB;
  --sans:"Instrument Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --ground:#101215; --surface:#181B1F; --surface-2:#1F2328; --ink:#E8EBEE; --muted:#98A1AC;
    --line:#2B3036; --line-strong:#454C55; --pad-off:#262A30; --btn:#E8EBEE; --btn-ink:#101215;
    --t1:#FF6B5F; --t2:#FFB43A; --t3:#2CCFB6; --t4:#8A91FF;
    --ok:#52C585; --ok-bg:#15291E; --warn:#EBAE45; --warn-bg:#2C2414; --fail:#FF6D66; --fail-bg:#321819;
    --focus:#8A91FF;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --ground:#101215; --surface:#181B1F; --surface-2:#1F2328; --ink:#E8EBEE; --muted:#98A1AC;
  --line:#2B3036; --line-strong:#454C55; --pad-off:#262A30; --btn:#E8EBEE; --btn-ink:#101215;
  --t1:#FF6B5F; --t2:#FFB43A; --t3:#2CCFB6; --t4:#8A91FF;
  --ok:#52C585; --ok-bg:#15291E; --warn:#EBAE45; --warn-bg:#2C2414; --fail:#FF6D66; --fail-bg:#321819;
  --focus:#8A91FF;
}
*{box-sizing:border-box}
body{margin:0}
body{background:var(--ground);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}
.app{max-width:1060px;margin:0 auto;padding-inline:20px;padding-block:32px 72px;display:flex;flex-direction:column;gap:22px}
h1,h2,h3{margin:0;text-wrap:balance}
p{margin:0}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--focus);outline-offset:2px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* Header */
.head{display:flex;gap:16px;align-items:center}
.logo{display:grid;grid-template-columns:repeat(8,7px);grid-auto-rows:7px;gap:3px;padding:9px;background:var(--btn);border-radius:10px;flex:none}
.logo i{border-radius:2px;background:var(--pad-off);opacity:.35}
.logo i.r0{background:var(--t1);opacity:1}.logo i.r1{background:var(--t2);opacity:1}.logo i.r2{background:var(--t3);opacity:1}.logo i.r3{background:var(--t4);opacity:1}
.head h1{font-size:clamp(28px,4.2vw,40px);font-stretch:78%;font-weight:680;letter-spacing:-.01em;line-height:1.05}
.head p{color:var(--muted);margin-top:4px}

/* Inputs */
.inputs{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.drop{position:relative;background:var(--surface);border:1.5px dashed var(--line-strong);border-radius:14px;padding:16px 18px;display:flex;flex-direction:column;gap:10px;transition:border-color .15s,background .15s}
.drop.over{border-color:var(--focus);background:var(--surface-2)}
.drop.loaded{border-style:solid;border-color:var(--line)}
.drop.error{border-style:solid;border-color:var(--fail)}
.step{display:flex;align-items:baseline;gap:10px}
.step b{font-family:var(--mono);font-size:12px;font-weight:500;color:var(--muted);border:1px solid var(--line-strong);border-radius:99px;min-width:22px;height:22px;display:inline-grid;place-items:center;flex:none}
.step h2{font-size:17px;font-weight:620;font-stretch:90%}
.step .ext{font-family:var(--mono);font-size:12.5px;color:var(--muted);font-weight:400}
.hint{color:var(--muted);font-size:14px}
.drop .file{display:flex;flex-direction:column;gap:2px;min-width:0}
.drop .file .name{font-weight:600;overflow-wrap:anywhere}
.drop .file .meta{font-family:var(--mono);font-size:12.5px;color:var(--muted);overflow-wrap:anywhere}
.drop .err{color:var(--fail);font-size:14px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.drop .row{margin-top:auto}
.btn-sec{background:var(--surface-2);border:1px solid var(--line);border-radius:8px;padding:7px 14px;cursor:pointer;font-size:14px;font-weight:550}
.btn-sec:hover{border-color:var(--line-strong)}
.privacy{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:13.5px;margin-top:-8px}
.privacy svg{flex:none}

/* Result */
.result{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:24px;display:flex;flex-direction:column;gap:24px}
.rhead{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;flex-wrap:wrap}
.rhead h2{font-size:22px;font-weight:650;font-stretch:85%}
.rhead .sub{color:var(--muted);font-size:14px;margin-top:2px;overflow-wrap:anywhere}
.pill{display:inline-flex;align-items:center;gap:6px;border-radius:99px;padding:3px 10px;font-size:12.5px;font-weight:600;letter-spacing:.02em;white-space:nowrap}
.pill.example{background:var(--surface-2);border:1px dashed var(--line-strong);color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:11.5px}
.pill.ok{background:var(--ok-bg);color:var(--ok)}.pill.warn{background:var(--warn-bg);color:var(--warn)}.pill.fail{background:var(--fail-bg);color:var(--fail)}
.chips{display:flex;gap:8px;flex-wrap:wrap}

/* Pad grid */
.padwrap{display:flex;flex-direction:column;gap:12px}
.pads{display:grid;grid-template-columns:minmax(72px,170px) repeat(8,minmax(0,52px));gap:6px;align-items:center}
.pads .colh{font-family:var(--mono);font-size:11.5px;color:var(--muted);text-align:center}
.pads .rowh{display:flex;align-items:center;gap:8px;min-width:0;font-size:13.5px}
.pads .rowh .dot{width:9px;height:9px;border-radius:3px;flex:none}
.pads .rowh span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pads .rowh.touched span{font-weight:650}
.pad{aspect-ratio:1;max-width:100%;border-radius:7px;background:var(--pad-off);position:relative}
.pad.same{background:var(--c);opacity:.3}
.pad.changed{background:var(--c);box-shadow:0 0 0 1px var(--c),0 0 14px -2px var(--c)}
.pad.new{background:var(--c);box-shadow:inset 0 0 0 3px var(--surface),0 0 0 2px var(--c),0 0 14px -2px var(--c)}
.pad.deleted{background:transparent;border:1.5px dashed var(--c)}
.pad.deleted::after{content:"";position:absolute;left:18%;right:18%;top:50%;height:1.5px;background:var(--c);transform:rotate(-45deg)}
.legend{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.legend span{display:inline-flex;align-items:center;gap:7px}
.legend .pad{width:14px;border-radius:4px;--c:var(--muted)}
.legend .pad.new{box-shadow:inset 0 0 0 2px var(--surface),0 0 0 1.5px var(--c)}
.legend .pad.changed{box-shadow:none}

/* Columns */
.cols{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:28px;align-items:start}
.cols h3{font-size:15px;font-weight:650;display:flex;gap:8px;align-items:baseline;margin-bottom:10px}
.cols h3 small{font-family:var(--mono);font-weight:400;color:var(--muted);font-size:12.5px}
.groups{display:flex;flex-direction:column;gap:8px}
.group{border:1px solid var(--line);border-radius:10px;background:var(--surface)}
.group summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:9px;padding:9px 12px;font-weight:600;font-size:14px}
.group summary::-webkit-details-marker{display:none}
.group summary .dot{width:9px;height:9px;border-radius:3px;flex:none;background:var(--muted)}
.group summary .cnt{margin-left:auto;font-family:var(--mono);font-size:12px;color:var(--muted);font-weight:400}
.group summary::after{content:"";width:7px;height:7px;border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);transform:rotate(-45deg);margin-left:4px;transition:transform .15s}
.group[open] summary::after{transform:rotate(45deg)}
.group ul{list-style:none;margin:0;padding:0 12px 10px;display:flex;flex-direction:column;gap:6px}
.group li{display:grid;gap:1px;font-size:13.5px;padding-top:6px;border-top:1px solid var(--line)}
.group li .path{color:var(--muted);font-size:12.5px;overflow-wrap:anywhere}
.group li .what{font-family:var(--mono);font-size:12.5px;overflow-wrap:anywhere}
.empty{color:var(--muted);font-size:14px;border:1px dashed var(--line);border-radius:10px;padding:14px}

.checks{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.checks li{display:grid;grid-template-columns:22px 1fr;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}
.checks li:last-child{border-bottom:0}
.checks .ic{width:22px;height:22px;border-radius:50%;display:grid;place-items:center}
.checks .ic svg{width:13px;height:13px}
.checks .ok .ic{background:var(--ok-bg);color:var(--ok)}
.checks .warn .ic{background:var(--warn-bg);color:var(--warn)}
.checks .fail .ic{background:var(--fail-bg);color:var(--fail)}
.checks .t{font-weight:600;font-size:14px}
.checks .d{color:var(--muted);font-size:13px;overflow-wrap:anywhere}

.notes{background:var(--warn-bg);border-radius:12px;padding:14px 16px;display:flex;flex-direction:column;gap:8px}
.notes h3{font-size:14px;color:var(--warn);font-weight:650}
.notes ul{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:4px;font-size:13.5px}

.missing{border:1.5px dashed var(--warn);border-radius:12px;padding:14px 16px;display:flex;flex-direction:column;gap:8px}
.missing.over{background:var(--warn-bg)}
.missing.done{border-color:var(--line);border-style:solid}
.smp{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.smp li{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap;padding:8px 0;border-top:1px solid var(--line)}
.smp li:first-child{border-top:0}
.smp .sn{display:flex;flex-direction:column;min-width:0;flex:1 1 260px}
.smp .nm{font-family:var(--mono);font-size:13px;overflow-wrap:anywhere}
.smp .hint{font-size:12.5px;overflow-wrap:anywhere}
.smp .sa{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.smp select{font:inherit;font-size:13.5px;color:var(--ink);background:var(--surface-2);border:1px solid var(--line);border-radius:8px;padding:6px 8px;max-width:100%}

/* Save */
.save{display:flex;gap:16px;align-items:center;flex-wrap:wrap;padding-top:20px;border-top:1px solid var(--line)}
.btn{background:var(--btn);color:var(--btn-ink);border:0;border-radius:10px;padding:12px 20px;font-weight:650;font-size:15px;cursor:pointer;display:inline-flex;gap:9px;align-items:center}
.btn:disabled{opacity:.35;cursor:not-allowed}
.save .out{display:flex;flex-direction:column;min-width:0;flex:1 1 240px}
.save .out .n{font-weight:600;overflow-wrap:anywhere}
.save .out .m{font-family:var(--mono);font-size:12.5px;color:var(--muted)}
.savemsg{font-size:14px;flex-basis:100%}
.savemsg.ok{color:var(--ok)}.savemsg.warn{color:var(--warn)}.savemsg.fail{color:var(--fail)}.savemsg.muted{color:var(--muted)}
.upload{font-size:13.5px;color:var(--muted);flex-basis:100%}
.upload a{color:var(--ink)}

.status{display:flex;gap:10px;align-items:center;color:var(--muted);font-size:14px}
.spin{width:16px;height:16px;border-radius:50%;border:2px solid var(--line);border-top-color:var(--ink);animation:sp .8s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.spin{animation:none}.group summary::after{transition:none}}

@media (max-width:860px){.cols{grid-template-columns:1fr}}
@media (max-width:720px){.inputs{grid-template-columns:1fr}.result{padding:18px}}
@media (max-width:520px){
  .pads{grid-template-columns:52px repeat(8,minmax(0,1fr));gap:4px}
  .pads .rowh span{display:none}
  .pads .rowh::after{content:attr(data-short);font-family:var(--mono);font-size:12px}
  .head{align-items:flex-start}
  .logo{grid-template-columns:repeat(8,5px);grid-auto-rows:5px;gap:2px;padding:7px}
}