:root{
  --bg:#ffffff;
  --ink:#16181d;
  --muted:#5b6270;
  --line:#e3e6ec;
  --line2:#c9ced8;
  --soft:#f6f7f9;
  --accent:#1f6feb;
  --accent-ink:#ffffff;
  --ok:#0f6e56;
  --warn:#854f0b;
  --radius:12px;
}

*{box-sizing:border-box}

html,body{margin:0;padding:0}

body{
  background:var(--bg);
  color:var(--ink);
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}

.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 20px;border-bottom:1px solid var(--line);
}
.brand{font-weight:600;font-size:15px}
.badge{
  font-size:12px;color:var(--muted);border:1px solid var(--line2);
  border-radius:999px;padding:3px 10px;
}

main{max-width:780px;margin:0 auto;padding:28px 20px 64px}

h1{
  font-size:30px;line-height:1.25;font-weight:600;
  margin:0 0 8px;letter-spacing:-0.01em;
}
.sub{margin:0 0 22px;color:var(--muted);font-size:16px}

.drop{
  border:1.5px dashed var(--line2);border-radius:var(--radius);
  background:var(--soft);padding:28px 18px;text-align:center;
  transition:border-color .15s,background .15s;
}
.drop.over{border-color:var(--accent);background:#eef4ff}
.drop.has{border-style:solid;border-color:var(--accent);background:#eef4ff}

.drop-icon{
  width:34px;height:34px;margin:0 auto 10px;border-radius:8px;
  background:var(--line2);position:relative;
}
.drop-icon::after{
  content:"";position:absolute;left:50%;top:9px;width:2px;height:10px;
  background:#fff;transform:translateX(-50%);
}
.drop-icon::before{
  content:"";position:absolute;left:50%;top:15px;width:12px;height:12px;
  border:2px solid #fff;border-top:0;border-right:0;
  transform:translateX(-50%) rotate(-45deg);
}
.drop-title{margin:0 0 4px;font-weight:500}
.drop-sub{margin:0 0 6px;color:var(--muted);font-size:14px}
.drop-hint{margin:0;color:var(--muted);font-size:13px}

.link-btn{
  background:none;border:0;padding:0;color:var(--accent);
  font:inherit;text-decoration:underline;cursor:pointer;
}

.controls{
  display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;
  margin-top:16px;
}
.ctl{display:flex;flex-direction:column;gap:5px;font-size:13px;color:var(--muted)}
.ctl select{
  font:inherit;color:var(--ink);padding:9px 10px;min-width:190px;
  border:1px solid var(--line2);border-radius:9px;background:#fff;
}
button.primary{
  font:inherit;font-weight:500;color:var(--accent-ink);background:var(--accent);
  border:0;border-radius:9px;padding:11px 22px;cursor:pointer;
}
button.primary:disabled{background:#b9c2d0;cursor:not-allowed}
button.primary:not(:disabled):hover{background:#1a5fd0}

.status{margin-top:18px}
.bar{height:6px;background:var(--line);border-radius:99px;overflow:hidden}
.barfill{height:100%;width:0;background:var(--accent);transition:width .2s}
.barfill.indet{
  width:35%;animation:slide 1.1s ease-in-out infinite;
}
@keyframes slide{0%{margin-left:-35%}100%{margin-left:100%}}
.status p{margin:8px 0 0;font-size:14px;color:var(--muted)}

.result{margin-top:26px;border-top:1px solid var(--line);padding-top:18px}
.result-head{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;
  justify-content:space-between;margin-bottom:14px;
}
.result-head h2{margin:0;font-size:18px;font-weight:600}
.actions{display:flex;flex-wrap:wrap;gap:8px}
.actions button{
  font:inherit;font-size:14px;background:#fff;color:var(--ink);
  border:1px solid var(--line2);border-radius:8px;padding:8px 13px;cursor:pointer;
}
.actions button:hover{border-color:var(--accent);color:var(--accent)}

.out{
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--soft);padding:14px;max-height:460px;overflow:auto;
}
.seg{display:flex;gap:12px;padding:7px 0;border-bottom:1px solid var(--line)}
.seg:last-child{border-bottom:0}
.ts{
  flex:0 0 auto;font-variant-numeric:tabular-nums;font-size:13px;
  color:var(--muted);padding-top:2px;min-width:62px;
}
.seg p{margin:0;word-break:break-word;overflow-wrap:anywhere}

.prose{margin-top:56px;padding-top:32px;border-top:1px solid var(--line)}
.prose h2{font-size:21px;font-weight:600;margin:34px 0 10px}
.prose h3{font-size:16px;font-weight:600;margin:22px 0 6px}
.prose p{margin:0 0 12px}
.prose ol{margin:0 0 12px;padding-left:22px}
.prose li{margin-bottom:7px}
.prose code{
  background:var(--soft);border:1px solid var(--line);border-radius:5px;
  padding:1px 5px;font-size:14px;
}
.lead{
  background:var(--soft);border-left:3px solid var(--accent);
  padding:12px 14px;border-radius:0 8px 8px 0;
}
.small{font-size:14px;color:var(--muted)}

.langlist{
  display:flex;flex-wrap:wrap;gap:6px;margin-top:12px;
}
.langlist span{
  font-size:13px;background:var(--soft);border:1px solid var(--line);
  border-radius:6px;padding:3px 8px;color:var(--muted);
}

.foot{
  border-top:1px solid var(--line);padding:18px 20px;
  text-align:center;color:var(--muted);font-size:13px;
}
.foot p{margin:0}

@media (max-width:600px){
  main{padding:20px 14px 48px}
  h1{font-size:25px}
  .sub{font-size:15px}
  .drop{padding:22px 12px}
  .ctl select{min-width:0;width:100%}
  .ctl{width:100%}
  button.primary{width:100%}
  .controls{gap:10px}
  .result-head{flex-direction:column;align-items:flex-start}
  .actions button{flex:1 1 auto}
  .ts{min-width:54px;font-size:12px}
  .prose{margin-top:40px}
}