@font-face {
  font-family: "Inter";
  src: url("../fonts/inter-variable.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --surface-2: #f4f4f5;
  --border: #e4e4e7;
  --border-strong: #d4d4d8;
  --text: #18181b;
  --muted: #71717a;
  --accent: #ea580c;
  --accent-soft: #fff4ec;
  --ring: rgba(234, 88, 12, .28);
  --ok: #16a34a;
  --err: #dc2626;
  --err-soft: #fef2f2;
  --btn: #18181b;
  --btn-text: #fafafa;
  --shadow: 0 1px 2px rgba(24, 24, 27, .04), 0 12px 32px -16px rgba(24, 24, 27, .12);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0c;
    --surface: #141416;
    --surface-2: #1c1c1f;
    --border: #27272a;
    --border-strong: #3f3f46;
    --text: #f4f4f5;
    --muted: #a1a1aa;
    --accent: #fb923c;
    --accent-soft: rgba(251, 146, 60, .1);
    --ring: rgba(251, 146, 60, .35);
    --ok: #4ade80;
    --err: #f87171;
    --err-soft: rgba(248, 113, 113, .1);
    --btn: #f4f4f5;
    --btn-text: #18181b;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 32px -16px rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 "Inter", system-ui, -apple-system, "Segoe UI", "Nirmala UI", "Noto Sans Devanagari", sans-serif;
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
.wrap { width: 100%; max-width: 720px; margin: 0 auto; padding: 0 16px; }

/* top bar */
.topbar { border-bottom: 1px solid var(--border); background: var(--surface); }
.topbar-inner { height: 56px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -.01em; text-decoration: none; }
.logo {
  width: 28px; height: 28px; border-radius: 7px; display: grid; place-items: center;
  background: var(--accent); color: #fff; font-size: 17px; line-height: 1;
}
.icon-link { color: var(--muted); display: grid; place-items: center; width: 36px; height: 36px; border-radius: 8px; }
.icon-link:hover { color: var(--text); background: var(--surface-2); }

/* panels */
main { flex: 1; }
main.wrap { padding-top: 40px; }
.panel {
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  padding: 20px; margin-bottom: 16px; box-shadow: var(--shadow);
}
.panel-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 12px; }
h2 { margin: 0; font-size: 15px; font-weight: 600; }

/* drop zone */
.drop {
  position: relative; display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 40px 20px; text-align: center; cursor: pointer;
  border: 1.5px dashed var(--border-strong); border-radius: 12px;
  transition: border-color .15s, background-color .15s;
}
.drop:hover, .drop.over { border-color: var(--accent); background: var(--accent-soft); }
.drop:focus-within { outline: 3px solid var(--ring); outline-offset: 2px; }
.drop input { position: absolute; inset: 0; opacity: 0; pointer-events: none; }
.drop-icon {
  width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; margin-bottom: 6px;
  background: var(--surface-2); color: var(--muted);
}
.drop:hover .drop-icon, .drop.over .drop-icon { color: var(--accent); }
.drop-title { font-weight: 600; }
.drop-sub { color: var(--muted); font-size: 13px; }
.u { text-decoration: underline; text-underline-offset: 3px; color: var(--text); }

/* chosen file */
.file { display: flex; align-items: center; gap: 12px; padding: 12px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface-2); }
.file.over { border-color: var(--accent); }
.file-icon { flex: none; width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; background: var(--surface); border: 1px solid var(--border); color: var(--muted); }
.file-text { min-width: 0; flex: 1; }
.file-name { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-meta { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.file.err .file-meta { color: var(--err); }

/* settings */
.fields { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field > span { font-size: 12px; font-weight: 500; color: var(--muted); }
select {
  appearance: none; -webkit-appearance: none; width: 100%; height: 38px; padding: 0 32px 0 11px;
  font: inherit; font-size: 14px; color: var(--text); background-color: var(--surface);
  border: 1px solid var(--border); border-radius: 9px; cursor: pointer; text-overflow: ellipsis;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 17px) 52%, calc(100% - 12px) 52%;
  background-size: 5px 5px; background-repeat: no-repeat;
}
select:hover:not(:disabled) { border-color: var(--border-strong); }
select:focus-visible { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--ring); }
select:disabled { opacity: .55; cursor: default; }

.device { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 14px; }
.switches { display: flex; flex-wrap: wrap; gap: 10px 24px; }
.switch { display: inline-flex; align-items: center; gap: 10px; font-size: 14px; cursor: pointer; user-select: none; }
.switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.knob { position: relative; width: 34px; height: 20px; border-radius: 99px; background: var(--border-strong); transition: background-color .15s; }
.knob::after { content: ""; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: #fff; box-shadow: 0 1px 2px rgba(0, 0, 0, .25); transition: transform .15s; }
.switch input:checked + .knob { background: var(--accent); }
.switch input:checked + .knob::after { transform: translateX(14px); }
.switch input:focus-visible + .knob { box-shadow: 0 0 0 3px var(--ring); }
.switch input:disabled + .knob { opacity: .5; }
.switch:has(input:disabled) { cursor: default; color: var(--muted); }
.chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 99px;
  font-size: 12px; font-weight: 500; color: var(--muted); background: var(--surface-2); border: 1px solid var(--border);
}
.chip::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--muted); }
.chip.on::before { background: var(--ok); }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 38px; padding: 0 16px;
  font: inherit; font-size: 14px; font-weight: 500; color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: 9px; cursor: pointer; transition: background-color .15s, border-color .15s, opacity .15s;
}
.btn:hover:not(:disabled) { background: var(--surface-2); border-color: var(--border-strong); }
.btn:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--ring); }
.btn.primary { width: 100%; height: 46px; margin-top: 18px; font-size: 15px; font-weight: 600; color: var(--btn-text); background: var(--btn); border-color: var(--btn); }
.btn.primary:hover:not(:disabled) { background: var(--btn); border-color: var(--btn); opacity: .88; }
.btn.ghost { background: transparent; }
.btn.small { height: 32px; padding: 0 12px; font-size: 13px; }
.btn:disabled { opacity: .45; cursor: default; }

/* progress */
.steps { list-style: none; display: flex; align-items: center; gap: 10px; margin: 0 0 22px; padding: 0; counter-reset: step; flex-wrap: wrap; }
.steps li { counter-increment: step; display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 500; color: var(--muted); }
.steps li::before {
  content: counter(step); width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center;
  font-size: 12px; font-weight: 600; border: 1px solid var(--border-strong); color: var(--muted); background: var(--surface);
}
.steps li + li::after { order: -1; content: ""; width: 24px; height: 1px; background: var(--border-strong); }
.steps li.active { color: var(--text); }
.steps li.active::before { border-color: var(--accent); color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.steps li.done { color: var(--text); }
.steps li.done::before { content: "✓"; border-color: var(--ok); background: var(--ok); color: var(--surface); }

.progress-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 8px; }
#status { font-weight: 600; white-space: pre-line; overflow-wrap: anywhere; }
#status.err { color: var(--err); font-weight: 500; }
.side { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.bar { height: 6px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.bar > div { height: 100%; width: 0; border-radius: inherit; background: var(--accent); transition: width .3s ease; }
.bar.busy > div { width: 35%; animation: slide 1.3s ease-in-out infinite; }
.bar.err > div { background: var(--err); }
@keyframes slide { from { transform: translateX(-100%); } to { transform: translateX(290%); } }
.quote {
  margin: 14px 0 0; padding: 10px 12px; border-radius: 9px; background: var(--surface-2);
  color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.downloads { display: flex; flex-direction: column; gap: 8px; }
.downloads:not(:empty) { margin-top: 18px; }
.dl {
  display: flex; align-items: center; gap: 12px; padding: 10px 12px; text-decoration: none;
  border: 1px solid var(--border); border-radius: 12px; transition: border-color .15s, background-color .15s;
}
.dl:hover { border-color: var(--border-strong); background: var(--surface-2); }
.dl.main { border-color: var(--accent); background: var(--accent-soft); }
.dl-badge {
  flex: none; width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center;
  font-size: 11px; font-weight: 700; letter-spacing: .02em; text-transform: uppercase;
  background: var(--surface); border: 1px solid var(--border); color: var(--muted);
}
.dl.main .dl-badge { color: var(--accent); border-color: var(--accent); }
.dl-text { min-width: 0; flex: 1; display: flex; flex-direction: column; }
.dl-text b { font-weight: 600; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dl-text small { color: var(--muted); font-size: 12px; }
.dl-icon { flex: none; color: var(--muted); display: grid; }
.dl.main .dl-icon { color: var(--accent); }

.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 14px; margin-top: 18px; }
.note { color: var(--muted); font-size: 13px; }
.actions:not(:has(.btn:not([hidden]))) { display: none; }

.details { margin-top: 16px; border-top: 1px solid var(--border); padding-top: 12px; }
.details summary { cursor: pointer; color: var(--muted); font-size: 13px; width: max-content; }
.details summary:hover { color: var(--text); }
pre {
  margin: 10px 0 0; padding: 12px; max-height: 220px; overflow: auto; border-radius: 9px; background: var(--surface-2);
  font: 12px/1.6 ui-monospace, "Cascadia Mono", Consolas, monospace; white-space: pre-wrap; overflow-wrap: anywhere;
}

/* preview */
.table-wrap { max-height: 440px; overflow: auto; border: 1px solid var(--border); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { padding: 9px 12px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: 0; }
th { position: sticky; top: 0; z-index: 1; background: var(--surface-2); font-size: 12px; font-weight: 600; color: var(--muted); }
td:first-child { width: 1%; white-space: nowrap; color: var(--muted); font: 12px/1.9 ui-monospace, "Cascadia Mono", Consolas, monospace; }
td:nth-child(3) { font-family: "Nirmala UI", "Noto Sans Devanagari", "Inter", system-ui, sans-serif; }

/* footer */
.foot { display: flex; justify-content: space-between; padding-top: 24px; padding-bottom: 32px; color: var(--muted); font-size: 13px; }
.foot a { text-decoration: none; }
.foot a:hover { color: var(--text); }

@media (max-width: 600px) {
  main.wrap { padding-top: 20px; }
  .panel { padding: 16px; border-radius: 14px; }
  .fields { grid-template-columns: 1fr; }
  .drop { padding: 32px 16px; }
  .steps { gap: 10px; flex-wrap: nowrap; }
  .steps li { gap: 6px; font-size: 12px; white-space: nowrap; }
  .steps li::before { width: 20px; height: 20px; font-size: 11px; }
  .steps li + li::after { display: none; }
}