:root {
  --bg: #f6f4ef;
  --panel: #ffffff;
  --ink: #1d1c1a;
  --muted: #6b675f;
  --line: #dcd7cc;
  --accent: #1f5fae;
  --accent-ink: #ffffff;
  --warn-bg: #fff4d6;
  --warn-ink: #7a5300;
  --bad: #b3261e;
  --ok: #2e7d32;
  --gap: #d93025;
  --anchor: #1f5fae;
  --scan-bg: #3a3936;
  --note-bg: #f3efe4;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1b1b1d; --panel: #242427; --ink: #ebe9e4; --muted: #a09c93;
    --line: #3a3a3e; --accent: #7fb0f0; --accent-ink: #10131a;
    --warn-bg: #3b3222; --warn-ink: #f3d28b; --bad: #f28b82; --ok: #81c995;
    --gap: #ff6b5e; --anchor: #7fb0f0; --scan-bg: #111112; --note-bg: #2b2a26;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #1b1b1d; --panel: #242427; --ink: #ebe9e4; --muted: #a09c93;
  --line: #3a3a3e; --accent: #7fb0f0; --accent-ink: #10131a;
  --warn-bg: #3b3222; --warn-ink: #f3d28b; --bad: #f28b82; --ok: #81c995;
  --gap: #ff6b5e; --anchor: #7fb0f0; --scan-bg: #111112; --note-bg: #2b2a26;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg); color: var(--ink);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
  display: flex; flex-direction: column;
}
button, select, input {
  font: inherit; color: inherit; background: var(--panel);
  border: 1px solid var(--line); border-radius: 6px; padding: 4px 10px;
}
button { cursor: pointer; }
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: .45; cursor: default; }
button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.bar {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 8px 14px; border-bottom: 1px solid var(--line); background: var(--panel);
}
.brand { margin-right: 6px; }
.spacer { flex: 1; }
.date { color: var(--muted); }
.date.warn { color: var(--warn-ink); background: var(--warn-bg); padding: 2px 8px; border-radius: 6px; }
.toggle { display: flex; align-items: center; gap: 4px; color: var(--muted); }

.banner { padding: 8px 14px; background: var(--warn-bg); color: var(--warn-ink); border-bottom: 1px solid var(--line); }
.banner code { user-select: all; }

main { flex: 1; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(360px, 1fr); min-height: 0; }

.scan { position: relative; overflow: hidden; background: var(--scan-bg); cursor: grab; touch-action: none; }
.scan.dragging { cursor: grabbing; }
.stage { position: absolute; left: 0; top: 0; transform-origin: 0 0; }
.stage img { display: block; user-select: none; -webkit-user-drag: none; }
.overlay { position: absolute; left: 0; top: 0; pointer-events: none; overflow: visible; }
.overlay .word { fill: none; stroke: #e0a800; stroke-width: 2; opacity: .55; }
.overlay .anchor { fill: rgba(31, 95, 174, .12); stroke: var(--anchor); stroke-width: 3; }
.overlay .focus { fill: rgba(217, 48, 37, .12); stroke: var(--gap); stroke-width: 6; }
.overlay .found { fill: rgba(46, 125, 50, .15); stroke: var(--ok); stroke-width: 4; }
.scanmsg {
  position: absolute; left: 50%; top: 16px; transform: translateX(-50%);
  background: var(--panel); color: var(--ink); padding: 6px 12px; border-radius: 6px;
  box-shadow: 0 2px 8px rgba(0,0,0,.3);
}
.hint { position: absolute; bottom: 8px; left: 12px; color: #cfcac0; font-size: 12px; pointer-events: none; }

.side { display: flex; flex-direction: column; min-height: 0; border-left: 1px solid var(--line); background: var(--panel); }
.tabs { display: flex; flex-wrap: wrap; gap: 4px; padding: 8px 10px 0; border-bottom: 1px solid var(--line); }
.tab {
  border: 1px solid var(--line); border-bottom: none; border-radius: 6px 6px 0 0;
  padding: 4px 10px; max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  background: var(--bg); color: var(--muted);
}
.tab.active { background: var(--panel); color: var(--ink); border-color: var(--accent); position: relative; top: 1px; }
.tab.note { font-style: italic; }
.tab .dot { color: var(--gap); }
.tab.add { border-style: dashed; }

.editorwrap { flex: 1.4; min-height: 160px; display: flex; }
#editor {
  flex: 1; resize: none; border: none; padding: 12px 14px; background: var(--panel); color: var(--ink);
  font: 15px/1.55 Georgia, "Times New Roman", serif; outline: none;
}
#editor[readonly] { background: var(--note-bg); color: var(--muted); font-family: ui-monospace, monospace; font-size: 13px; }
#editor.note { background: var(--note-bg); }

.savebar { display: flex; align-items: center; gap: 8px; padding: 6px 10px; border-top: 1px solid var(--line); }
.status { color: var(--muted); }
.status.dirty { color: var(--warn-ink); }
.status.error { color: var(--bad); }
.status.ok { color: var(--ok); }

.panel { flex: 1; min-height: 120px; overflow: auto; border-top: 1px solid var(--line); padding: 8px 10px; }
.panel h3 { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin: 4px 0 6px; }
.panel .empty { color: var(--muted); }
.gap {
  display: grid; grid-template-columns: auto 1fr auto; gap: 8px; align-items: baseline;
  padding: 6px 8px; border-radius: 6px; cursor: pointer; border: 1px solid transparent;
}
.gap:hover { background: var(--bg); }
.gap.active { border-color: var(--gap); }
.gap .n { color: var(--muted); font-variant-numeric: tabular-nums; }
.gap .ctx { font-family: Georgia, serif; }
.gap .ctx mark { background: none; color: var(--gap); font-weight: 600; }
.gap .where { font-size: 12px; color: var(--muted); white-space: nowrap; }
.gap .where.miss { color: var(--bad); }
.notelist li { margin: 2px 0; cursor: pointer; }
.notelist li.miss { color: var(--muted); cursor: default; }

.modal { position: fixed; inset: 0; background: rgba(0,0,0,.4); display: flex; align-items: center; justify-content: center; }
.modal[hidden] { display: none; }
.modalbox { background: var(--panel); color: var(--ink); border-radius: 10px; padding: 18px; width: min(460px, 92vw); box-shadow: 0 8px 30px rgba(0,0,0,.35); }
.modalbox input { width: 100%; margin-top: 6px; }
.modalbtns { display: flex; justify-content: flex-end; gap: 8px; margin-top: 14px; }

@media (max-width: 800px) {
  main { grid-template-columns: 1fr; grid-template-rows: 55vh auto; }
  .side { border-left: none; border-top: 1px solid var(--line); }
}

/* batch / date pickers */
.picker { max-width: 22em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.picker::after { content: " ▾"; color: var(--muted); }
.pop { position: fixed; z-index: 20; background: var(--panel); color: var(--ink); border: 1px solid var(--line);
  border-radius: 10px; box-shadow: 0 8px 30px rgba(0,0,0,.3); width: min(520px, 94vw); max-height: 70vh;
  display: flex; flex-direction: column; padding: 8px; gap: 8px; }
.pop[hidden] { display: none; }
.poplist { overflow: auto; }
.poplist .grp { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); margin: 8px 4px 2px; }
.poplist .empty { color: var(--muted); padding: 10px 4px; }
.row { display: block; width: 100%; text-align: left; border: 0; border-radius: 6px; padding: 6px 8px; background: none; }
.row:hover, .row.sel { background: var(--note-bg); }
.row.cur { box-shadow: inset 3px 0 0 var(--accent); }
.row .sub { display: block; color: var(--muted); font-size: 12px; }
.day { display: flex; align-items: center; gap: 6px; padding: 3px 4px; border-radius: 6px; flex-wrap: wrap; }
.day.sel { background: var(--note-bg); }
.day .dl { width: 9.5em; flex: none; }
.day.guess .dl { color: var(--warn-ink); }
.chip { padding: 1px 8px; font-size: 12px; border-radius: 12px; }
.chip.cur { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.chip.art { border-color: var(--ok); }
.chip.gaps { border-color: var(--gap); }
.chip.none { color: var(--muted); border-style: dashed; }

/* administration page */
.adminlink { color: var(--accent); text-decoration: none; padding: 0 6px; }
.adminlink:hover { text-decoration: underline; }
.atabs { display: flex; gap: 4px; margin-left: 12px; }
.atabs button.active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.adminpage { overflow: auto; }
.adminmain { display: block; flex: none; padding: 16px 20px 40px; width: min(1100px, 100%); margin: 0 auto; }
.adminmain h2 { margin: 6px 0 4px; }
.hint2 { color: var(--muted); max-width: 70ch; }
.amsg { padding: 8px 12px; border-radius: 6px; background: var(--note-bg); }
.amsg.bad { background: var(--warn-bg); color: var(--warn-ink); }
.atable { border-collapse: collapse; width: 100%; margin: 10px 0; }
.atable th, .atable td { text-align: left; padding: 6px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.atable th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.atable .n { text-align: right; font-variant-numeric: tabular-nums; }
.atable tfoot td { font-weight: 600; border-top: 2px solid var(--line); border-bottom: 0; }
.atable a { color: var(--accent); }
.muted { color: var(--muted); font-size: 12px; }
.warnc { color: var(--warn-ink); }
.addform, .filters { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin: 12px 0; }
.addform input { min-width: 18em; }
button.danger { background: var(--bad); color: #fff; border-color: var(--bad); }