* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #ffffff;
  --surface: #f4f4f5;
  --surface2: #e7e7ea;
  --border: #d0d0d5;
  --text: #18181b;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent2: #e4e4e7;
  --ok: #15803d;
  --bad: #b91c1c;
  --btn: #27272a;
  --btn-text: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #191919;
    --surface: #232323;
    --surface2: #2c2c2c;
    --border: #3a3a3a;
    --text: #e6e6e6;
    --muted: #9a9a9a;
    --accent: #6b93e6;
    --accent2: #2f2f2f;
    --ok: #5cbf6a;
    --bad: #e06c6c;
    --btn: #e6e6e6;
    --btn-text: #191919;
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 15px;
}

#app {
  max-width: 620px;
  margin: 2.5rem auto;
  padding: 0 1rem;
}

h1 { font-size: 1.4rem; font-weight: 600; margin-bottom: .5rem; }
h2 { font-size: 1.15rem; font-weight: 600; margin-bottom: 1rem; }
h3 { font-size: .95rem; font-weight: 600; margin: 0; }
h4 { font-size: .9rem; font-weight: 600; }
p  { margin-bottom: 1rem; color: var(--muted); }
p.note { font-size: .85rem; }
code { background: var(--surface); padding: .05rem .3rem; border: 1px solid var(--border); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .85em; }

section { margin-bottom: 2rem; }

/* file picker */
.file-pick {
  display: inline-block;
  padding: .5rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
}
.file-pick:hover, .file-pick:focus-within { border-color: var(--accent); }
.file-pick input { display: none; }

#file-list { margin-top: .7rem; font-size: .9rem; color: var(--muted); }
.file-item { padding: .15rem 0; }

.error { color: var(--bad); margin-top: .5rem; font-size: .9rem; }

/* config form */
.form-row { display: flex; gap: 1.5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.form-row label { display: flex; flex-direction: column; gap: .3rem; font-size: .85rem; color: var(--muted); }
select, input[type=number] {
  padding: .35rem .5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: .95rem;
}

/* buttons */
button {
  font-size: .95rem;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: .4rem .8rem;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button:active { background: var(--surface2); }
button:disabled { opacity: .5; cursor: default; border-color: var(--border); }

.primary {
  background: var(--btn);
  color: var(--btn-text);
  border-color: var(--btn);
  padding: .5rem 1.4rem;
  font-weight: 500;
}
.primary:hover { border-color: var(--btn); opacity: .9; }
.primary.small { padding: .35rem .8rem; font-size: .88rem; }

.link-btn {
  background: none;
  border: none;
  color: var(--muted);
  text-decoration: underline;
  padding: .3rem 0;
  font-size: .9rem;
}
.link-btn:hover { color: var(--text); }

/* ABX header + live score */
.abx-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
.abx-head h2 { margin-bottom: .3rem; }
.score-live { font-size: .9rem; color: var(--muted); font-variant-numeric: tabular-nums; }

/* transport */
.transport { display: flex; align-items: center; gap: .5rem; margin: 1rem 0 1.2rem; }
.tp-btn { padding: .35rem .7rem; font-size: .88rem; min-width: 58px; }
.seek {
  flex: 1;
  height: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
  cursor: pointer;
}
.seek-fill { height: 100%; width: 0%; background: var(--accent); }
.time { font-size: .8rem; color: var(--muted); font-variant-numeric: tabular-nums; min-width: 78px; text-align: right; }

/* switch buttons A / B / X */
.player-row { display: flex; gap: .8rem; justify-content: center; margin-bottom: 1.3rem; }
.play-btn {
  width: 96px;
  height: 84px;
  font-size: 1.6rem;
  font-weight: 600;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.play-btn.accent { border-color: var(--border); }
.play-btn.active { background: var(--surface2); border-color: var(--accent); border-width: 2px; }
.play-btn .sub { font-size: .62rem; font-weight: 400; color: var(--muted); margin-top: .2rem; }

.prompt { text-align: center; color: var(--text); font-weight: 500; margin-bottom: .7rem; }

/* answer buttons */
.answer-row { display: flex; gap: .8rem; justify-content: center; margin-bottom: 1.2rem; }
.ans-btn { min-width: 120px; height: 44px; font-size: 1rem; font-weight: 500; }

/* history */
#history { display: flex; gap: .35rem; flex-wrap: wrap; justify-content: center; margin-bottom: 1rem; }
#history .dot { width: 14px; height: 14px; border: 1px solid var(--border); background: var(--surface); }
#history .dot.correct { background: var(--ok); border-color: var(--ok); }
#history .dot.wrong   { background: var(--bad); border-color: var(--bad); }
#history .dot.answered { background: var(--muted); border-color: var(--muted); }
#history .dot.current { border-color: var(--accent); border-width: 2px; }

#btn-abort { display: block; margin: 0 auto; }

/* processing progress */
#processing { margin-top: 1rem; color: var(--muted); }
#processing-text { font-weight: 500; color: var(--text); margin-bottom: .4rem; }
.progress-bar { height: 8px; background: var(--surface); border: 1px solid var(--border); overflow: hidden; margin-bottom: .3rem; }
.progress-fill { height: 100%; width: 0%; background: var(--accent); transition: width .15s linear; }
.progress-fill.done { background: var(--ok); }
#processing-detail { font-size: .8rem; }

/* per-codec results */
#results-by-codec { margin-bottom: 1.5rem; }
.results-bitrate { text-align: left; margin-bottom: .8rem; color: var(--muted); font-size: .9rem; }
.codec-result {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .55rem .8rem;
  border: 1px solid var(--border);
  border-top: none;
}
.codec-result:first-of-type { border-top: 1px solid var(--border); }
.codec-name { font-weight: 600; min-width: 56px; }
.codec-score { min-width: 62px; font-variant-numeric: tabular-nums; }
.codec-pval { min-width: 100px; font-size: .9rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.codec-verdict { flex: 1; text-align: right; font-weight: 500; }

/* per-track results */
#results-per-track { margin-bottom: 1.5rem; }
#results-per-track h3 { margin-bottom: .7rem; }
.track-group { margin-bottom: 1rem; }
.track-group h4 { margin-bottom: .3rem; }
.track-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.track-table td { padding: .28rem .5rem; border-bottom: 1px solid var(--border); font-variant-numeric: tabular-nums; }
.track-table td:first-child { color: var(--muted); }
.track-table td.right { text-align: right; white-space: nowrap; }

/* report */
.report-block { margin-bottom: 1.5rem; }
.report-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: .3rem; }
.report {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: .9rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .8rem;
  line-height: 1.5;
  color: var(--text);
  overflow-x: auto;
  white-space: pre;
}

/* raw table */
#results-table { width: 100%; border-collapse: collapse; margin-bottom: 1rem; font-size: .85rem; }
#results-table th, #results-table td { padding: .3rem .5rem; border-bottom: 1px solid var(--border); text-align: center; }
#results-table th { font-weight: 600; color: var(--muted); }

/* codec checkboxes */
.codec-checks { border: 1px solid var(--border); padding: .7rem .9rem; margin-bottom: 1rem; }
.codec-checks legend { font-size: .85rem; color: var(--muted); padding: 0 .3rem; }
.codec-checks label { margin-right: 1.2rem; cursor: pointer; }

.check-row { display: block; font-size: .85rem; color: var(--muted); cursor: pointer; margin-bottom: 1rem; }
.check-row input { margin-right: .4rem; }

.trial-file { text-align: center; color: var(--text); font-size: .95rem; margin-bottom: .5rem; }

/* submission block */
.submit-block { border: 1px solid var(--border); padding: 1rem; margin-bottom: 1.5rem; }
.submit-block h3 { margin-bottom: .4rem; }
.submit-block .form-row { margin-bottom: .7rem; }
.full-field { display: flex; flex-direction: column; gap: .3rem; font-size: .85rem; color: var(--muted); margin-bottom: .8rem; }
.full-field textarea, .form-row input[type=text] {
  padding: .35rem .5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  font: inherit;
  font-size: .95rem;
  width: 100%;
  resize: vertical;
}
.submit-row { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.submit-status { font-size: .88rem; color: var(--muted); }
.submit-status.ok { color: var(--ok); }
.submit-status.err { color: var(--bad); }

.results-actions { display: flex; align-items: center; gap: 1.2rem; flex-wrap: wrap; }

.app-footer { margin-top: 2.5rem; padding-top: 1rem; border-top: 1px solid var(--border); color: var(--muted); font-size: .8rem; font-variant-numeric: tabular-nums; }

details { margin-bottom: 1rem; }
details summary { cursor: pointer; color: var(--muted); margin-bottom: .5rem; }