:root {
  --bg: #f5f6f8; --card: #fff; --text: #16181d; --muted: #667085; --line: #e3e6ec;
  --accent: #1f6feb; --accent-text: #fff; --ok: #1a7f37; --err: #cf222e; --warn: #9a6700;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1115; --card: #171a21; --text: #e6e8ec; --muted: #8b93a3; --line: #2a2f3a;
          --accent: #4c8dff; --ok: #3fb950; --err: #f85149; --warn: #d29922; }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); }
h1 { font-size: 22px; margin: 0 0 4px; } h2 { font-size: 16px; margin: 0 0 12px; }
.muted { color: var(--muted); } .small { font-size: 13px; } .error { color: var(--err); min-height: 1.2em; }
code { font-size: 12.5px; background: var(--bg); padding: 1px 5px; border-radius: 4px; word-break: break-all; }
.center { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 16px; }
.narrow { width: 100%; max-width: 360px; display: grid; gap: 12px; }
.wrap { max-width: 860px; margin: 0 auto; padding: 16px; }
label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
input { font: inherit; color: var(--text); background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 9px 10px; width: 100%; }
input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
button { font: inherit; border-radius: 8px; padding: 9px 14px; border: 1px solid var(--line); background: var(--card); color: var(--text); cursor: pointer; }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
button.ghost { background: transparent; }
button:disabled { opacity: .5; cursor: not-allowed; }
button.small { padding: 4px 10px; font-size: 13px; }
.topbar { display: flex; align-items: center; gap: 12px; padding: 12px 16px; background: var(--card); border-bottom: 1px solid var(--line); }
.spacer { flex: 1; } .row { display: flex; align-items: center; gap: 8px; }
.tabs { display: flex; gap: 4px; max-width: 860px; margin: 12px auto 0; padding: 0 16px; }
.tabs button { border: none; background: none; border-bottom: 2px solid transparent; border-radius: 0; color: var(--muted); }
.tabs button[aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }
.grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; align-items: end; }
.span2 { grid-column: span 2; } .span3 { grid-column: span 3; }
.stepper { display: flex; gap: 8px; }
@media (max-width: 600px) { .grid4 { grid-template-columns: 1fr 1fr; } .span3 { grid-column: span 2; } }
.drops { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 14px 0; }
@media (max-width: 600px) { .drops { grid-template-columns: 1fr; } }
.drop { border: 2px dashed var(--line); border-radius: var(--radius); padding: 22px 14px; display: grid; gap: 4px; text-align: center; cursor: pointer; min-height: 96px; align-content: center; }
.drop.big { min-height: 160px; margin-top: 12px; }
.drop.over, .drop:focus { border-color: var(--accent); outline: none; }
.drop.has-file { border-style: solid; border-color: var(--ok); }
.drop-file { word-break: break-all; }
.queue { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.queue li { border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; display: grid; gap: 6px; }
.q-top { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.q-name { font-weight: 600; word-break: break-all; flex: 1; min-width: 0; }
.q-meta { font-size: 13px; color: var(--muted); }
.bar { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; }
.bar > i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .2s; }
li.done .bar > i { background: var(--ok); } li.failed .bar > i { background: var(--err); }
li.done .q-status { color: var(--ok); } li.failed .q-status, li.conflict .q-status { color: var(--err); }
.history { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.history th, .history td { text-align: left; padding: 7px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
.history td:nth-child(2) { word-break: break-all; }
.toast { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 8px; max-width: calc(100% - 32px); }