:root{
  --bg:#F1F1F2;
  --card:#FFFFFF;
  --ink:#111214;
  --muted:#6B7078;
  --line:#E2E4E7;
  --sky:#8FD8F8;
  --sky-deep:#1D8FD1;
  --sky-soft:#E8F5FD;
  --warn:#A8412F;
  --ok:#12A37B;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  font-size:16px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
.sr-only{
  position:absolute;width:1px;height:1px;overflow:hidden;
  clip:rect(0 0 0 0);white-space:nowrap;
}

.shell{max-width:920px;margin:0 auto;padding:0 clamp(12px,3vw,24px)}

.topbar{background:rgba(241,241,242,.92);backdrop-filter:blur(10px);position:sticky;top:0;z-index:10}
.topbar .row{display:flex;align-items:baseline;gap:12px;padding:12px 0;flex-wrap:wrap}
.logo{font-weight:850;letter-spacing:.16em;font-size:17px}
.tagline{font-size:12.5px;color:var(--muted)}

h1{
  font-size:clamp(28px,7.5vw,46px);line-height:1.05;letter-spacing:-.03em;
  font-weight:850;text-transform:uppercase;margin:22px 0 10px;
}
.lead{color:#33383E;font-size:clamp(14.5px,3.6vw,17px);margin:0 0 20px;max-width:56ch}

.card{
  background:var(--card);border:1px solid var(--line);border-radius:20px;
  padding:clamp(14px,3.6vw,24px);margin-bottom:12px;
}
.card h2{font-size:14px;font-weight:800;text-transform:uppercase;letter-spacing:.08em;margin:0 0 14px}

/* зона загрузки */
.drop{
  border:2px dashed #D6DEE5;border-radius:18px;background:#FCFDFE;
  padding:clamp(22px,6vw,36px) 14px;text-align:center;cursor:pointer;
  display:flex;flex-direction:column;gap:6px;
  transition:border-color .15s,background .15s;
}
.drop:hover,.drop:focus-visible{border-color:var(--sky-deep);outline:none}
.drop.over{border-color:var(--sky-deep);background:var(--sky-soft)}
.drop-title{font-size:clamp(15px,4vw,19px);font-weight:750;letter-spacing:-.01em}
.drop-hint{font-size:clamp(11.5px,3vw,13.5px);color:var(--muted)}

.files{list-style:none;margin:14px 0 0;padding:0;max-height:240px;overflow:auto}
.files li{
  display:flex;align-items:center;gap:10px;padding:9px 11px;font-size:13.5px;
  border:1px solid var(--line);border-radius:12px;margin-bottom:6px;
}
.files .nm{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.files .sz{color:var(--muted);font-size:12px;flex-shrink:0}
.files .x{
  border:none;background:none;color:var(--muted);font-size:18px;line-height:1;
  cursor:pointer;padding:2px 5px;border-radius:6px;flex-shrink:0;
}
.files .x:hover{color:var(--warn);background:var(--bg)}
.files .bad{color:var(--warn);font-size:12px}

/* режимы */
.modes{display:grid;grid-template-columns:1fr;gap:8px;margin-bottom:4px}
@media (min-width:540px){ .modes{grid-template-columns:repeat(3,1fr)} }
.mode{
  display:flex;flex-direction:column;align-items:flex-start;gap:3px;
  border:1.5px solid var(--line);border-radius:16px;background:var(--card);
  padding:13px;cursor:pointer;font:inherit;color:var(--ink);text-align:left;
  transition:border-color .14s,background .14s,transform .12s;
}
.mode:hover{border-color:var(--sky-deep)}
.mode:active{transform:scale(.99)}
.mode.is-on{border-color:var(--sky-deep);background:var(--sky-soft)}
.mode-ico{width:30px;height:30px;border-radius:9px;margin-bottom:5px;border:1px solid var(--line)}
.ico-transparent{
  background-image:linear-gradient(45deg,#DDE3E0 25%,transparent 25%,transparent 75%,#DDE3E0 75%),
                   linear-gradient(45deg,#DDE3E0 25%,transparent 25%,transparent 75%,#DDE3E0 75%);
  background-size:10px 10px;background-position:0 0,5px 5px;background-color:#fff;
}
.ico-color{background:linear-gradient(135deg,#8FD8F8,#1D8FD1)}
.ico-blur{background:linear-gradient(135deg,#F1C9EF,#A855F7);filter:blur(2px)}
.mode-name{font-weight:700;font-size:15px}
.mode-note{font-size:12.5px;color:var(--muted)}

.opt{margin-top:16px}
.opt > label{display:block;font-size:13px;font-weight:650;margin-bottom:8px}
.swatches{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.sw{
  width:34px;height:34px;border-radius:10px;border:2px solid var(--line);
  background:var(--sw);cursor:pointer;padding:0;
}
.sw.is-on{border-color:var(--ink);box-shadow:0 0 0 2px #fff inset}
input[type=color]{
  width:44px;height:34px;padding:0;border:1px solid var(--line);
  border-radius:10px;background:none;cursor:pointer;
}
.rangerow{display:flex;align-items:center;gap:12px}
input[type=range]{flex:1;accent-color:var(--sky-deep);margin:0}
.rangerow output{font-variant-numeric:tabular-nums;font-size:14px;min-width:30px;text-align:right;color:var(--muted)}

.go{
  display:block;width:100%;margin-top:18px;padding:14px;border:none;border-radius:999px;
  background:var(--sky-deep);color:#fff;font:inherit;font-size:16px;font-weight:700;
  cursor:pointer;text-align:center;text-decoration:none;
}
.go:hover{background:#15709F}
.go:disabled{background:#DCE5EB;color:#93A0AB;cursor:default}
.ghost{
  display:block;width:100%;margin-top:9px;padding:12px;border:1.5px solid var(--line);
  border-radius:999px;background:none;font:inherit;font-size:15px;font-weight:650;
  cursor:pointer;color:var(--ink);
}
.ghost:hover{border-color:var(--sky-deep);color:var(--sky-deep)}

.progress{height:6px;border-radius:3px;background:var(--bg);overflow:hidden;margin-top:14px}
.progress i{display:block;height:100%;width:0;background:var(--sky-deep);transition:width .2s}
.status{margin:10px 0 0;font-size:14px;color:var(--muted);min-height:21px}
.status.err{color:var(--warn)}
.status.ok{color:var(--ok)}

/* результат */
.preview{
  border-radius:16px;overflow:hidden;min-height:140px;
  background-image:linear-gradient(45deg,#DDE3E0 25%,transparent 25%,transparent 75%,#DDE3E0 75%),
                   linear-gradient(45deg,#DDE3E0 25%,transparent 25%,transparent 75%,#DDE3E0 75%);
  background-size:20px 20px;background-position:0 0,10px 10px;background-color:#fff;
  display:flex;align-items:center;justify-content:center;
}
.preview img{max-height:min(60vh,520px);width:auto}
.preview .zipbox{padding:28px 16px;text-align:center;color:var(--muted);font-size:14px}

.notes ul{margin:0;padding-left:18px;font-size:14px;color:#33383E}
.notes li{margin-bottom:7px}
.foot{padding:18px 0 40px;color:var(--muted);font-size:12.5px}

@media (prefers-reduced-motion:reduce){*{transition:none!important}}