:root {
  --bg: #f7f7f5;
  --fg: #1d1d1f;
  --muted: #5f6368;
  --card: #ffffff;
  --border: #d9d9d6;
  --accent: #0b6bcb;
  --accent-fg: #ffffff;
  --ok: #1a7f37;
  --fail: #c62828;
  --warn: #9a6700;
  --hr: #c2185b;
  --safe: #1a7f37;
  --safe-bg: #e9f6ec;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161618;
    --fg: #ececec;
    --muted: #a0a0a6;
    --card: #1f1f22;
    --border: #3a3a3f;
    --accent: #5aa9ff;
    --accent-fg: #0b1a2b;
    --ok: #4cc26a;
    --fail: #ff6b6b;
    --warn: #e3b341;
    --hr: #f06292;
    --safe: #4cc26a;
    --safe-bg: #15271b;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }  /* even for elements styled with a display */
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}
main { max-width: 52rem; margin: 0 auto; padding: 2rem 16px 3rem; }
h1 { margin: 0; font-size: 2rem; letter-spacing: -.02em; display: flex; align-items: center; gap: .6rem; }
h1 .mark { width: 2.6rem; height: 2.4rem; flex: none; }
h1 .mark .hole { fill: var(--bg); }
.tagline { margin: 0 0 .75rem; color: var(--muted); font-weight: 600; }
h2 { margin: 0 0 .5rem; font-size: 1.15rem; }
a { color: var(--accent); }
.lede { font-size: 1.1rem; margin: 0 0 .5rem; }
header { margin-bottom: 1.5rem; }
.top { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; }
#lang {
  font: inherit;
  font-size: .9rem;
  color: var(--fg);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .3rem .5rem;
}
.privacy {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--safe-bg);
  border: 1px solid var(--safe);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin-top: 1rem;
}
.privacy h2 { color: var(--safe); margin-bottom: .25rem; }
.privacy p { margin: 0; }
.privacy .more { margin-top: .4rem; font-size: .9rem; color: var(--muted); }
.lock { width: 2rem; height: 2rem; flex: none; color: var(--safe); }
.lock.small { width: 1em; height: 1em; vertical-align: -.12em; }
.privacy-note { margin: .6rem 0 0; font-size: .9rem; font-weight: 600; color: var(--safe); }

section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}
section p { margin: 0; }
section p.note { margin-top: .5rem; font-size: .9rem; color: var(--muted); }
footer { color: var(--muted); font-size: .9rem; margin-top: 1.5rem; }

.drop {
  display: block;
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 2rem 1rem;
  text-align: center;
  cursor: pointer;
  color: var(--muted);
}
.drop.over, .drop:hover { border-color: var(--accent); color: var(--fg); }
.drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.drop:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }
#filelist { margin: .75rem 0 0; padding-inline-start: 1.25rem; }
#filelist:empty { display: none; }

.actions { display: flex; flex-wrap: wrap; gap: .75rem 1rem; align-items: center; margin-top: 1rem; }
button, .button {
  font: inherit;
  font-weight: 600;
  border: 0;
  border-radius: 8px;
  padding: .6rem 1.2rem;
  background: var(--accent);
  color: var(--accent-fg);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
button:disabled { opacity: .5; cursor: default; }
button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--border); }
.force { color: var(--muted); font-size: .95rem; }
#status { margin-top: .75rem; color: var(--muted); }
#status:empty { display: none; }

.error { color: var(--fail); font-weight: 600; }
.table-wrap { overflow-x: auto; margin-bottom: .75rem; }
td { unicode-bidi: plaintext; }
table { border-collapse: collapse; width: 100%; font-variant-numeric: tabular-nums; }
th, td { padding: .35rem .6rem; border-bottom: 1px solid var(--border); white-space: nowrap; }
td, tr:first-child th { text-align: end; }
tr th:first-child { text-align: start; font-weight: 500; color: var(--muted); }
td:last-child, tr:first-child th:last-child { font-weight: 700; }
#notes { margin-bottom: .75rem; }
#checks, #warnings { list-style: none; padding: 0; margin: 0 0 1rem; }
#checks li { padding-inline-start: 1.5rem; }
#checks li::before { display: inline-block; width: 1.5rem; margin-inline-start: -1.5rem; font-weight: 700; }
#checks li.ok::before { content: "✓"; color: var(--ok); }
#checks li.fail::before { content: "✗"; color: var(--fail); }
#checks li.fail { color: var(--fail); }
#warnings li { color: var(--warn); }
#warnings li.fail { color: var(--fail); font-weight: 600; }
#warnings li::before { content: "⚠ "; }

.chart, .track { display: block; width: 100%; border: 1px solid var(--border); border-radius: 8px; touch-action: none; }
.chart { height: 200px; margin-top: .75rem; cursor: ew-resize; }
.track { height: 320px; margin-top: .75rem; }
.legend { display: flex; flex-wrap: wrap; gap: .2rem 1rem; margin: .4rem 0 0; font-size: .85rem; color: var(--muted); }
.swatch { display: inline-block; width: 1.2em; height: .25em; vertical-align: .2em; border-radius: 2px; }
.swatch.speed { background: var(--accent); }
.swatch.hr { background: var(--hr); }
.bounds { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; align-items: center; margin-top: .75rem; }
.bounds input { font: inherit; font-variant-numeric: tabular-nums; width: 6.5em; padding: .25rem .4rem;
  color: var(--fg); background: var(--bg); border: 1px solid var(--border); border-radius: 6px; }
#keep { color: var(--muted); }
#track-box .force { display: block; margin-top: .5rem; }
#trim-hint:empty { display: none; }

@media (max-width: 600px) {
  main { padding-top: 1.25rem; }
  section { padding: 1rem; }
  table { font-size: .85rem; }
  th, td { padding: .3rem .25rem; white-space: normal; }
  .privacy { gap: .6rem; padding: .9rem 1rem; }
  .lock { width: 1.4rem; height: 1.4rem; }
}