:root {
  --bg: #f5f7fa; --fg: #17202a; --mut: #5b6876; --card: #fff; --line: #d6dde5; --acc: #0b5cad; --acc2: #e8f1fb;
  --ok: #1d7a3e; --warn: #9a5b00; --err: #b3261e; --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; color: var(--fg); background: var(--bg);
}
* { box-sizing: border-box; }
body { margin: 0; }
h1 { font-size: 1.6rem; margin: 0; }
h2 { font-size: 1.2rem; margin: 0 0 .75rem; }
.top, main, .foot { max-width: 1180px; margin: 0 auto; padding: 1rem; }
.sub { margin: .25rem 0 0; color: var(--mut); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 1rem 1.25rem; margin-bottom: 1rem; }
.small, .note { font-size: .875rem; color: var(--mut); }
.k { color: var(--mut); min-width: 4rem; display: inline-block; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: 1rem; background: #fff; padding: .5rem; z-index: 10; }
.vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
:focus-visible { outline: 3px solid #f2a900; outline-offset: 2px; }
button { font: inherit; padding: .5rem 1rem; border-radius: 6px; border: 1px solid var(--acc); background: var(--acc); color: #fff; cursor: pointer; }
button.secondary { background: #fff; color: var(--acc); }
button:disabled { opacity: .5; cursor: not-allowed; }
input, select { font: inherit; padding: .35rem .5rem; border: 1px solid var(--line); border-radius: 4px; max-width: 100%; }
input[type=number] { width: 9rem; }
input[aria-invalid=true] { border-color: var(--err); outline: 1px solid var(--err); }
fieldset { border: 1px solid var(--line); border-radius: 6px; margin: 0 0 .75rem; }
.banner { padding: .5rem .75rem; border-radius: 6px; margin: .5rem 0 0; }
.warn { background: #fff4e0; border: 1px solid #f0c27a; color: #5b3a00; }
.msg { padding: .75rem 1rem; border-radius: 6px; margin-bottom: 1rem; background: #fdecea; border: 1px solid #f3b4ae; color: #6b1510; }
.msg.info { background: var(--acc2); border-color: #b5d0ee; color: #0a3767; }
.drop { border: 2px dashed var(--line); border-radius: 8px; padding: 1.5rem; text-align: center; cursor: pointer; }
.drop.over, .drop:hover { border-color: var(--acc); background: var(--acc2); }
.link { color: var(--acc); text-decoration: underline; }
.upinfo { margin-top: .75rem; display: grid; gap: .25rem; }
progress { width: 100%; height: 1rem; }
.jobbar { display: flex; flex-wrap: wrap; gap: .5rem 1rem; align-items: center; margin-bottom: .75rem; }
.state { font-weight: 600; padding: .2rem .6rem; border-radius: 99px; background: var(--acc2); color: var(--acc); }
.state.bad { background: #fdecea; color: var(--err); }
.state.good { background: #e6f4ea; color: var(--ok); }
.badge { display: inline-block; font-size: .75rem; font-weight: 600; padding: .05rem .45rem; border-radius: 4px; border: 1px solid currentColor; margin-left: .35rem; }
.b-confirmed { color: var(--ok); } .b-heuristic { color: var(--warn); } .b-manual { color: var(--acc); }
.detect { margin-bottom: .75rem; }
.detect p { margin: .25rem 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr)); gap: .75rem 1rem; margin-bottom: .5rem; }
.f { display: flex; flex-direction: column; gap: .2rem; font-size: .9rem; }
.f[hidden] { display: none; }
.mode label { margin-right: 1.25rem; }
.issues { padding-left: 1.2rem; }
.issues li.error { color: var(--err); } .issues li.warning { color: var(--warn); }
.tabs { display: flex; gap: .25rem; border-bottom: 1px solid var(--line); margin-bottom: .75rem; }
.tabs [role=tab] { background: #fff; color: var(--fg); border: 1px solid var(--line); border-bottom: none; border-radius: 6px 6px 0 0; }
.tabs [aria-selected=true] { background: var(--acc); color: #fff; border-color: var(--acc); }
.vlist { position: relative; height: 22rem; overflow: auto; border: 1px solid var(--line); border-radius: 4px; font: 13px/20px var(--mono); background: #fbfcfd; margin-top: .5rem; }
.vlist .rows { position: absolute; left: 0; right: 0; top: 0; }
.vlist .r { height: 20px; white-space: pre; padding: 0 .5rem; }
.vlist .o { color: var(--mut); }
.vlist .x { color: var(--err); font-weight: 600; }
.imgwrap { overflow: auto; max-height: 75vh; border: 1px solid var(--line); background: #222; }
canvas { display: block; max-width: 100%; height: auto; image-rendering: pixelated; }
.codecs { display: grid; grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr)); gap: .5rem 1rem; }
.codec { display: flex; gap: .5rem; align-items: flex-start; }
.codec .small { display: block; }
.row { display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; align-items: center; margin: .5rem 0 1rem; }
.tw { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { border-bottom: 1px solid var(--line); padding: .4rem .5rem; text-align: right; vertical-align: top; white-space: nowrap; }
td.l.mid, td.l.bad { white-space: normal; }
caption { caption-side: bottom; text-align: left; padding-top: .4rem; }
th:first-child, td:first-child { text-align: left; }
td.l, th.l { text-align: left; }
thead th { background: #eef2f6; position: sticky; top: 0; }
.ok { color: var(--ok); font-weight: 600; } .bad { color: var(--err); font-weight: 600; } .mid { color: var(--warn); }
.chart { margin: 1rem 0; }
.chart figcaption { margin-bottom: .25rem; }
.chart svg { width: 100%; max-width: 760px; height: auto; }
.chart text { font: 12px system-ui, sans-serif; fill: var(--fg); }
details { margin: .5rem 0; }
summary { cursor: pointer; font-weight: 600; }
dl.kv { display: grid; grid-template-columns: max-content 1fr; gap: .2rem 1rem; font-size: .875rem; margin: .5rem 0; }
dl.kv dt { color: var(--mut); }
dl.kv dd { margin: 0; overflow-wrap: anywhere; }
.foot { color: var(--mut); }
@media (max-width: 640px) {
  .card { padding: .75rem; }
  h1 { font-size: 1.3rem; }
  .vlist { font-size: 11px; }
  dl.kv { grid-template-columns: 1fr; }
  input[type=number] { width: 100%; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }