/* subtitle-tools — lightweight own brand. Light + dark via prefers-color-scheme.
   No external fonts, no network, no third-party CSS. */

:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --ink: #16202c;
  --ink-soft: #55637a;
  --line: #dbe1ea;
  --accent: #2f6df0;
  --accent-ink: #ffffff;
  --ok: #12855a;
  --err-bg: #fdecec;
  --err-ink: #a3231f;
  --err-line: #f2b8b6;
  --field: #ffffff;
  --code-bg: #eef1f6;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(20, 32, 48, .06), 0 6px 20px rgba(20, 32, 48, .05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e131a;
    --panel: #161d27;
    --ink: #e8edf4;
    --ink-soft: #9aa7ba;
    --line: #2a3543;
    --accent: #5b8dff;
    --accent-ink: #0b1220;
    --ok: #4ad9a0;
    --err-bg: #2c1618;
    --err-ink: #ff9d99;
    --err-line: #5a2a2c;
    --field: #0f151d;
    --code-bg: #202a37;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 20px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.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;
}

code {
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  font-size: .86em;
  background: var(--code-bg);
  padding: .05em .35em;
  border-radius: 5px;
}

/* --- header --- */
.app-header {
  flex: none;
  padding: 12px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 9px;
  color: var(--accent-ink); background: var(--accent);
  flex: none;
}
.brand-text h1 {
  margin: 0; font-size: 19px; font-weight: 700; letter-spacing: -.01em;
}
.tagline { margin: 1px 0 0; font-size: 13px; color: var(--ink-soft); }
.tagline strong { color: var(--ink); }

/* --- workspace: two columns on desktop, stacked on mobile, always fits the fold --- */
.workspace {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(340px, 1fr) 1fr;
  gap: 16px;
  padding: 16px 20px;
  overflow: hidden;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
  min-height: 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.panel-input { overflow: auto; }

.panel-title {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--ink-soft);
}
.panel-title + .panel-title { margin-top: 14px; }

/* --- dropzone --- */
.dropzone {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
  gap: 2px;
  padding: 16px;
  border: 1.5px dashed var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  cursor: pointer;
  transition: border-color .12s, background .12s;
}
.dropzone:hover, .dropzone:focus-visible { border-color: var(--accent); outline: none; }
.dropzone.dragover { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, var(--bg)); }
.dropzone.has-file { border-style: solid; border-color: var(--ok); }
.drop-icon { font-size: 22px; line-height: 1; color: var(--accent); }
.drop-main { font-size: 14px; }
.drop-sub { font-size: 12px; color: var(--ink-soft); }
.drop-loaded { margin-top: 4px; font-size: 13px; font-weight: 600; color: var(--ok); }

/* secondary (bilingual) file slot — smaller sibling of the main dropzone */
.dropzone-sm { padding: 10px 12px; gap: 1px; }
.dropzone-sm .drop-main { font-size: 13px; }
.field-label {
  display: block;
  font-size: 13px; font-weight: 600;
  margin-bottom: 4px;
}
.opt-badge {
  display: inline-block;
  font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em;
  vertical-align: middle;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, var(--panel));
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--line));
  border-radius: 999px;
  padding: 1px 7px;
  margin-left: 6px;
}

/* --- controls --- */
.transform-row { margin-bottom: 8px; }
select, input[type="number"], input[type="text"] {
  font: inherit;
  color: var(--ink);
  background: var(--field);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 9px;
}
select { width: 100%; }
select:focus, input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.params { margin-bottom: 12px; }
.pgroup > label {
  display: block;
  font-size: 13px; font-weight: 600;
  margin-bottom: 4px;
}
.pgroup input[type="number"] { width: 130px; }
.hint { margin: 6px 0 0; font-size: 12px; color: var(--ink-soft); }

.anchor {
  display: flex; align-items: center; gap: 6px;
  margin-top: 8px;
}
.anchor-lbl { font-size: 12px; font-weight: 600; width: 62px; flex: none; }
.anchor input { flex: 1; min-width: 0; }
.anchor .arrow { color: var(--ink-soft); flex: none; }

/* frame-rate resync: two labelled selects with an arrow between */
.fps-row { display: flex; align-items: flex-end; gap: 10px; }
.fps-row > div { flex: 1; min-width: 0; }
.fps-row select { width: 100%; }
.fps-row .arrow { color: var(--ink-soft); flex: none; padding-bottom: 8px; }

/* checkbox option rows (cleanup, transcript, split) */
.pgroup .check {
  display: flex; align-items: flex-start; gap: 8px;
  font-size: 13px; font-weight: 500;
  margin-bottom: 6px; cursor: pointer;
}
.pgroup .check input[type="checkbox"] {
  margin: 2px 0 0; width: 15px; height: 15px; flex: none; accent-color: var(--accent);
}
.pgroup .check code { font-weight: 400; }
/* partial-shift / split use full-width standalone text inputs (not the flex anchors) */
.pgroup[data-for="shift-after"] input[type="text"],
.pgroup[data-for="split"] input[type="text"] { width: 100%; }
.pgroup[data-for="shift-after"] input[type="number"] { width: 130px; }

/* --- actions --- */
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: auto; padding-top: 6px; }
.btn {
  font: inherit; font-weight: 600;
  padding: 9px 16px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

/* --- output --- */
.panel-output { }
.out-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.out-meta { font-size: 12px; color: var(--ink-soft); }
.status {
  margin: 8px 0;
  font-size: 13px;
  color: var(--ink-soft);
  padding: 8px 10px;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--line);
}
.status.ok { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, var(--line)); }
.status.error {
  color: var(--err-ink);
  background: var(--err-bg);
  border-color: var(--err-line);
  font-weight: 600;
}
/* --- honest reported-flag notices (enforceGap / rebalance) --- */
.notices { flex: none; display: flex; flex-direction: column; gap: 6px; margin: 0 0 8px; }
.notice {
  font-size: 12.5px; line-height: 1.5;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink-soft);
  /* residual/QC notices can quote a raw cue's long unbreakable token (the exact
     "unbreakable word" case splitLongCues leaves in its residual list). Without
     this it forces the column past the viewport and .workspace clips it. */
  overflow-wrap: anywhere;
  word-break: break-word;
}
.notice.good { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, var(--line)); }
.notice.warn { color: var(--err-ink); background: var(--err-bg); border-color: var(--err-line); }
.notice ul { margin: 5px 0 0; padding-left: 18px; }
.notice li { margin: 2px 0; }

/* autoFix change log — a scrollable list of every mutation + honest residuals */
.notice.changelog { max-height: 34vh; overflow: auto; }
.changelog .cl-head { font-weight: 700; margin-bottom: 4px; color: var(--ink); }
.changelog ol { margin: 4px 0 0; padding-left: 20px; }
.changelog li { margin: 3px 0; line-height: 1.45; }
.changelog li .cl-op {
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  font-size: .82em; font-weight: 700;
}
.changelog li.residual { color: var(--err-ink); }
.changelog .cl-empty { color: var(--ok); font-weight: 600; }

.preview {
  flex: 1;
  min-height: 0;
  width: 100%;
  resize: none;
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--field);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  overflow: auto;
  white-space: pre;
}

/* --- reading-speed readout (on-page, replaces the preview for the CPS report) --- */
.readout {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.readout-summary {
  flex: none;
  font-size: 13px; font-weight: 600;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--bg);
}
.readout-summary.good { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, var(--line)); }
.readout-summary.warn { color: var(--err-ink); background: var(--err-bg); border-color: var(--err-line); }
.readout-tablewrap {
  flex: 1;
  min-height: 0;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field);
}
.readout-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
}
.readout-table th, .readout-table td {
  padding: 5px 10px;
  text-align: right;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.readout-table th:last-child, .readout-table td:last-child { text-align: left; }
.readout-table thead th {
  position: sticky; top: 0;
  background: var(--panel);
  color: var(--ink-soft);
  font-size: 11px; text-transform: uppercase; letter-spacing: .05em;
  z-index: 1;
}
.readout-table tr.too-fast td {
  color: var(--err-ink);
  background: var(--err-bg);
  font-weight: 600;
}

/* --- QC report: compact threshold grid + left-aligned finding table --- */
.qc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px 10px;
}
.qc-grid > div { min-width: 0; }
.qc-grid label {
  display: block;
  font-size: 12px; font-weight: 600;
  margin-bottom: 3px;
}
.pgroup .qc-grid input[type="number"] { width: 100%; }
.readout-table.qc-table td, .readout-table.qc-table th { text-align: left; }
.readout-table.qc-table td:first-child, .readout-table.qc-table th:first-child {
  text-align: right; width: 3.2em; color: var(--ink-soft);
}
.readout-table.qc-table td:nth-child(2) { font-weight: 600; white-space: nowrap; }
.readout-table.qc-table td:last-child { white-space: normal; color: var(--ink-soft); }

/* --- footer --- */
.app-footer {
  flex: none;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 8px 20px;
  border-top: 1px solid var(--line);
  background: var(--panel);
  font-size: 12px; color: var(--ink-soft);
}

/* --- mobile: stack, keep input + result both in the fold --- */
@media (max-width: 760px) {
  .workspace {
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(0, 1fr);
    gap: 12px;
    padding: 12px;
  }
  .panel { padding: 12px; }
  .panel-input { flex: none; max-height: 58vh; }
  .dropzone { padding: 12px; }
  .actions .btn { flex: 1 1 auto; }
  .app-footer { display: none; }
}