:root {
  color-scheme: light;
  --bg: oklch(1 0 0);
  --surface: oklch(0.965 0.004 270);
  --ink: oklch(0.205 0.022 270);
  --muted: oklch(0.49 0.025 270);
  --line: oklch(0.885 0.008 270);
  --primary: oklch(0.45 0.18 270);
  --primary-hover: oklch(0.39 0.17 270);
  --accent: oklch(0.69 0.135 205);
  --danger: oklch(0.53 0.19 28);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; min-height: 100vh; }
button, input, select { font: inherit; }
button, summary, .file-row { -webkit-tap-highlight-color: transparent; }

.site-header {
  height: 64px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand { color: var(--ink); text-decoration: none; font-weight: 720; letter-spacing: -.02em; }
.brand-mark { color: var(--primary); margin-right: 8px; }
.local-badge { color: var(--muted); font-size: 13px; }

main { max-width: 1120px; margin: 0 auto; padding: 72px 24px 48px; }
.intro { max-width: 760px; margin-bottom: 40px; }
.eyebrow { margin: 0 0 12px; color: var(--primary); font-size: 12px; font-weight: 750; letter-spacing: .14em; }
h1 { margin: 0; max-width: 720px; font-size: 2.625rem; line-height: 1.12; letter-spacing: -.035em; text-wrap: balance; }
.intro > p:last-child { max-width: 650px; margin: 18px 0 0; color: var(--muted); font-size: 17px; line-height: 1.65; }

.workspace { display: grid; grid-template-columns: minmax(0, 2fr) minmax(270px, 1fr); gap: 32px; align-items: start; }
.converter { min-width: 0; }
.file-list { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.file-row { min-height: 94px; padding: 18px; display: grid; grid-template-columns: 36px minmax(0, 1fr) auto; gap: 14px; align-items: center; cursor: pointer; background: var(--bg); transition: background-color 180ms ease-out, box-shadow 180ms ease-out; }
.file-row + .file-row { border-top: 1px solid var(--line); }
.file-row:hover { background: var(--surface); }
.file-row[data-dragover="true"] { position: relative; z-index: 1; background: color-mix(in oklch, var(--primary) 8%, var(--bg)); box-shadow: inset 0 0 0 2px var(--primary); }
.file-row[data-dragover="true"] .file-copy small { color: var(--primary); }
.file-row[data-ready="true"] .step { border-color: var(--accent); background: color-mix(in oklch, var(--accent) 14%, var(--bg)); color: var(--ink); }
.file-row:focus-within { outline: 3px solid color-mix(in oklch, var(--primary) 28%, transparent); outline-offset: -3px; }
.step { width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: var(--muted); font-size: 13px; font-weight: 700; }
.file-copy { min-width: 0; display: grid; gap: 4px; }
.file-copy strong { font-size: 15px; }
.file-copy small { color: var(--muted); line-height: 1.35; }
.file-action { position: relative; max-width: 180px; min-height: 40px; padding: 0 14px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 8px; color: var(--primary); font-size: 14px; font-weight: 680; overflow: hidden; }
.file-action span { width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-action input { position: absolute; inset: 0; width: 100%; opacity: 0; cursor: pointer; }
.template-controls { min-width: 210px; display: grid; gap: 8px; }
.template-controls .file-action { width: 100%; max-width: none; }
.select-control select { min-width: 210px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.advanced { margin: 18px 0; border-bottom: 1px solid var(--line); }
.advanced summary { padding: 12px 2px 16px; cursor: pointer; color: var(--muted); font-weight: 650; }
.advanced summary:hover { color: var(--ink); }
.option-grid { padding: 4px 0 22px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.option-grid label { display: grid; gap: 7px; color: var(--muted); font-size: 13px; }
input[type="number"], select { width: 100%; height: 42px; padding: 0 10px; border: 1px solid var(--line); border-radius: 7px; background: var(--bg); color: var(--ink); }
input:focus-visible, select:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid color-mix(in oklch, var(--primary) 28%, transparent); outline-offset: 2px; }

.primary { width: 100%; min-height: 52px; border: 0; border-radius: 9px; background: var(--primary); color: white; font-weight: 750; cursor: pointer; }
.primary:hover { background: var(--primary-hover); }
.primary:disabled { opacity: .55; cursor: wait; }

.side-panel { border-left: 1px solid var(--line); padding-left: 28px; }
.status { display: grid; grid-template-columns: 12px 1fr; gap: 12px; align-items: start; }
.status-dot { width: 9px; height: 9px; margin-top: 6px; border-radius: 50%; background: var(--muted); }
.status[data-state="ready"] .status-dot, .status[data-state="success"] .status-dot { background: var(--accent); }
.status[data-state="working"] .status-dot { background: var(--primary); animation: pulse 1.1s ease-in-out infinite; }
.status[data-state="error"] .status-dot { background: var(--danger); }
.status strong { font-size: 15px; }
.status p { margin: 5px 0 0; color: var(--muted); font-size: 14px; line-height: 1.55; }
.template-info { margin: 24px 0 0; }
.template-info div { padding: 11px 0; display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line); font-size: 13px; }
.template-info dt { color: var(--muted); }
.template-info dd { margin: 0; text-align: right; }
.transfer-note { margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--line); }
.transfer-note strong { font-size: 14px; }
.transfer-note p { margin: 8px 0 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
code { padding: 2px 5px; border-radius: 4px; background: var(--surface); color: var(--ink); }
footer { max-width: 1120px; margin: 0 auto; padding: 22px 24px 34px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }

@keyframes pulse { 50% { opacity: .35; transform: scale(.75); } }
@media (max-width: 800px) {
  main { padding-top: 48px; }
  .workspace { grid-template-columns: 1fr; }
  .side-panel { border-left: 0; border-top: 1px solid var(--line); padding: 24px 0 0; }
  .option-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .site-header, main, footer { padding-left: 16px; padding-right: 16px; }
  .local-badge { display: none; }
  .file-row { grid-template-columns: 32px minmax(0, 1fr); }
  h1 { font-size: 2rem; }
  .file-action, .template-controls { grid-column: 2; width: 100%; max-width: none; min-width: 0; }
  .select-control select { min-width: 0; }
  .option-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; } }