/* OCR Lab — one stylesheet, both themes, no external fonts. */

:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel2: #1c2330;
  --ink: #e6edf3;
  --ink-dim: #9aa7b4;
  --line: #2a3441;
  --accent: #4c9aff;
  --accent-ink: #08131f;
  --ok: #3fb950;
  --warn: #d29922;
  --bad: #f85149;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 10px;
}

:root[data-theme="light"] {
  --bg: #f6f8fa;
  --panel: #ffffff;
  --panel2: #f0f3f6;
  --ink: #1f2328;
  --ink-dim: #5b6570;
  --line: #d8dee4;
  --accent: #0969da;
  --accent-ink: #ffffff;
  --ok: #1a7f37;
  --warn: #9a6700;
  --bad: #cf222e;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
}

code, pre, .mono { font-family: var(--mono); }
.mono { font-size: 0.92em; }
.small { font-size: 0.86em; }
.muted { color: var(--ink-dim); }
.hidden { display: none !important; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
a { color: var(--accent); }
a:hover { text-decoration: underline; }
kbd {
  font-family: var(--mono); font-size: 0.82em; padding: 1px 5px;
  border: 1px solid var(--line); border-radius: 4px; background: var(--panel2);
}

/* --- top bar ------------------------------------------------------------- */

.topbar {
  display: flex; flex-wrap: wrap; gap: 10px;
  align-items: center; justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.brand .title { font-weight: 650; font-size: 1.08em; letter-spacing: 0.01em; }
.brand .back { text-decoration: none; font-size: 0.86em; color: var(--ink-dim); }
.brand .back:hover { color: var(--accent); }
.session { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.credits { font-family: var(--mono); font-size: 0.84em; color: var(--ink-dim); }

/* --- buttons ------------------------------------------------------------- */

.btn {
  font: inherit; cursor: pointer;
  background: var(--accent); color: var(--accent-ink);
  border: 1px solid transparent; border-radius: 8px;
  padding: 8px 14px;
}
.btn:hover:not(:disabled) { filter: brightness(1.08); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.small { padding: 5px 10px; font-size: 0.86em; }
.btn.tiny { padding: 3px 8px; font-size: 0.78em; }
.btn.ghost {
  background: transparent; color: var(--ink); border-color: var(--line);
}
.btn.ghost:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); filter: none; }
.btn.primary { font-weight: 600; }
.linkbtn {
  font: inherit; cursor: pointer; background: none; border: 0; padding: 0;
  color: var(--accent); text-decoration: underline;
}
a.linkbtn { text-decoration: underline; }

/* --- layout -------------------------------------------------------------- */

main { max-width: 1080px; margin: 0 auto; padding: 24px 20px 8px; }
.intro h1 { font-size: 1.55em; line-height: 1.25; margin: 0 0 10px; }
.intro p { margin: 0 0 10px; max-width: 74ch; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  margin: 18px 0;
}
.cardhead {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; margin-bottom: 10px;
}
.cardhead h2 { font-size: 1.05em; margin: 0; }
.card > p:first-of-type { margin-top: 0; }

.row { display: flex; align-items: center; flex-wrap: wrap; }
.row.gap { gap: 10px; margin-top: 14px; }
.row.gap.tight { margin-top: 8px; gap: 8px; }
.checkline { display: flex; align-items: center; gap: 6px; font-size: 0.86em; color: var(--ink-dim); }

/* --- badges + notices ---------------------------------------------------- */

.badge {
  font-family: var(--mono); font-size: 0.76em; text-transform: uppercase;
  letter-spacing: 0.04em; padding: 3px 8px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--ink-dim); white-space: nowrap;
}
.badge.good { color: var(--ok); border-color: var(--ok); }
.badge.warn { color: var(--warn); border-color: var(--warn); }
.badge.bad { color: var(--bad); border-color: var(--bad); }
.badge.soft { background: var(--panel2); }

.notice {
  border: 1px solid var(--line); border-left-width: 3px;
  border-radius: 6px; padding: 10px 12px; margin: 12px 0;
  background: var(--panel2); font-size: 0.9em;
}
.notice p { margin: 0 0 6px; }
.notice p:last-child { margin-bottom: 0; }
.notice.good { border-left-color: var(--ok); }
.notice.warn { border-left-color: var(--warn); }
.notice.bad { border-left-color: var(--bad); }
.bad { color: var(--bad); }

.empty {
  border: 1px dashed var(--line); border-radius: 8px;
  padding: 16px; color: var(--ink-dim); font-size: 0.9em;
}

/* --- dropzones ----------------------------------------------------------- */

.dropzone {
  border: 2px dashed var(--line); border-radius: 10px;
  padding: 22px 16px; text-align: center; cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone:hover, .dropzone:focus-visible { border-color: var(--accent); outline: none; }
.dropzone.over { border-color: var(--accent); background: var(--panel2); }
.dropzone p { margin: 0 0 6px; }
.dropzone p:last-child { margin-bottom: 0; }

details.help { margin-top: 12px; font-size: 0.9em; }
details.help summary { cursor: pointer; color: var(--ink-dim); }
details.help summary:hover { color: var(--accent); }
details.help p { max-width: 78ch; }

/* --- key/value grid ------------------------------------------------------ */

.kvgrid {
  display: grid; grid-template-columns: minmax(120px, 200px) 1fr;
  gap: 4px 14px; font-size: 0.88em; margin: 4px 0 2px;
}
.kvgrid .k { color: var(--ink-dim); }
.kvgrid .v { font-family: var(--mono); font-size: 0.94em; word-break: break-word; }
.kvgrid .v.bad { color: var(--bad); }

/* --- canvas -------------------------------------------------------------- */

.canvaswrap {
  margin-top: 14px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--panel2); overflow: auto; max-height: 62vh;
}
.canvaswrap canvas { display: block; max-width: 100%; height: auto; }

/* --- progress ------------------------------------------------------------ */

.progress { margin-top: 14px; }
.steps { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.step {
  font-size: 0.76em; font-family: var(--mono); padding: 2px 8px;
  border: 1px solid var(--line); border-radius: 999px; color: var(--ink-dim);
}
.step.active { border-color: var(--accent); color: var(--accent); }
.step.done { border-color: var(--ok); color: var(--ok); }
.bar { height: 5px; background: var(--panel2); border-radius: 999px; overflow: hidden; }
.bar .fill { height: 100%; width: 0; background: var(--accent); transition: width 0.25s ease; }

/* --- recognised lines ---------------------------------------------------- */

.lines { list-style: none; margin: 14px 0 0; padding: 0; }
.lines li.line {
  border: 1px solid var(--line); border-radius: 8px;
  padding: 8px 10px; margin-bottom: 8px; background: var(--panel2);
}
.lines li.line.weak { border-left: 3px solid var(--warn); }
.lines li.muted { padding: 10px 0; font-size: 0.9em; }
.linehead { display: flex; align-items: center; gap: 10px; margin-bottom: 4px; }
.linehead .num { color: var(--ink-dim); font-size: 0.8em; }
.linehead .conf { font-size: 0.8em; }
.linehead .conf.good { color: var(--ok); }
.linehead .conf.ok { color: var(--warn); }
.linehead .conf.bad { color: var(--bad); }
.linehead button { margin-left: auto; }
.linetext { font-size: 1.02em; word-break: break-word; }

/* --- AI output ----------------------------------------------------------- */

.formgrid {
  display: grid; grid-template-columns: minmax(140px, 220px) 1fr;
  gap: 8px 14px; align-items: center; margin: 14px 0 6px;
}
.formgrid label { font-size: 0.9em; color: var(--ink-dim); }
.formgrid select, .formgrid input[type="text"] {
  font: inherit; padding: 7px 9px; border-radius: 7px;
  border: 1px solid var(--line); background: var(--bg); color: var(--ink);
  width: 100%; max-width: 460px;
}
input[type="search"] {
  font: inherit; padding: 7px 9px; border-radius: 7px; flex: 1 1 240px;
  border: 1px solid var(--line); background: var(--bg); color: var(--ink);
}

.summary { font-size: 1.02em; margin: 10px 0; }
.outblock { border-top: 1px solid var(--line); padding-top: 12px; margin-top: 14px; }
.outhead { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.outhead h3 { font-size: 0.95em; margin: 0; }
.prose { max-width: 80ch; }
.prose.pre { white-space: pre-wrap; }
.prose h3, .prose h4, .prose h5 { margin: 14px 0 6px; font-size: 1em; }
.prose p { margin: 0 0 10px; }
.prose ul, .prose ol { margin: 0 0 10px; padding-left: 22px; }
.prose blockquote {
  margin: 0 0 10px; padding: 4px 12px; border-left: 3px solid var(--line);
  color: var(--ink-dim);
}
.prose table { border-collapse: collapse; margin: 0 0 12px; font-size: 0.92em; }
.prose th, .prose td { border: 1px solid var(--line); padding: 5px 9px; text-align: left; }
.prose th { background: var(--panel2); }

pre.code {
  background: var(--panel2); border: 1px solid var(--line); border-radius: 8px;
  padding: 10px 12px; overflow-x: auto; font-size: 0.86em; margin: 8px 0 0;
}
ul.flags { margin: 8px 0 0; padding-left: 20px; font-size: 0.92em; }
ul.flags li { margin-bottom: 4px; }
ul.flags li.muted { list-style: none; margin-left: -20px; }

/* --- history ------------------------------------------------------------- */

.history { list-style: none; margin: 12px 0 0; padding: 0; }
.history li.hitem {
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px;
  margin-bottom: 8px; background: var(--panel2);
}
.history li.muted { font-size: 0.9em; }
.hhead { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }

/* --- footer -------------------------------------------------------------- */

footer {
  max-width: 1080px; margin: 0 auto; padding: 18px 20px 40px;
  border-top: 1px solid var(--line); color: var(--ink-dim);
}
footer p { max-width: 82ch; margin: 0 0 8px; }

/* --- narrow -------------------------------------------------------------- */

@media (max-width: 620px) {
  main { padding: 16px 14px 8px; }
  .card { padding: 14px; }
  .kvgrid, .formgrid { grid-template-columns: 1fr; }
  .kvgrid .k { margin-top: 6px; }
  .formgrid label { margin-top: 6px; }
  .intro h1 { font-size: 1.3em; }
}

/* --- past-scans panel ----------------------------------------------------- */

.overlay {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 72px 16px 24px;
  background: rgba(0, 0, 0, 0.55);
  overflow-y: auto;
}
:root[data-theme="light"] .overlay { background: rgba(20, 24, 28, 0.38); }

.overlay .panel {
  width: min(760px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.4);
  max-height: calc(100vh - 96px);
  overflow-y: auto;
}
.panelhead {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.panelhead h2 { font-size: 1.05em; margin: 0 0 4px; }
.panelhead .row.gap.tight { margin-top: 0; }
.overlay .history { max-height: none; }

@media (max-width: 620px) {
  .overlay { padding: 56px 10px 16px; }
  .overlay .panel { padding: 14px; }
}