/* ════════════════════════════════════════════════════════════════════════
 * ForMath — Studenttool werkblad — stylesheet
 * ════════════════════════════════════════════════════════════════════════
 * Tokens en look-and-feel overgenomen uit de authortool (app.css), zodat
 * beide tools identiek aanvoelen: lichte paper-UI, dunne --rule-lijnen,
 * mosterd-oker accent, Fraunces/IBM Plex Sans/JetBrains Mono.
 * Ondersteunt licht/donker via [data-theme] op <html>.
 * ════════════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600&family=IBM+Plex+Sans:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Tokens (gelijk aan authortool) ──────────────────────────────────── */
:root {
  --bg:           #f6f4ed;
  --bg-panel:     #fbfaf5;
  --bg-sunken:    #ede9dd;

  --ink:          #1c1f26;
  --ink-soft:     #4d5260;
  --ink-dim:      #87889a;

  --rule:         #dcd7c6;
  --rule-strong:  #b8b09a;

  --accent:       #ae7a15;
  --accent-ink:   #6a4807;
  --accent-soft:  #efe0b6;

  --ok:           #2f6d3f;
  --ok-soft:      #dcead0;
  --warn:         #a25d09;
  --warn-soft:    #f5e4c4;
  --err:          #983018;
  --err-soft:     #f4d6ce;

  --margin-red:   #c98a8a;     /* rode kantlijn op het schrift */
  --margin-green: #5f9c5f;     /* groene kopstreep */
  --rule-line:    #cdd9e6;     /* liniaallijnen (blauwig, schrift) */

  --font-display: 'Fraunces', 'Iowan Old Style', Georgia, serif;
  --font-ui:      'IBM Plex Sans', -apple-system, 'Segoe UI', sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', Menlo, monospace;

  --radius:       4px;
  --radius-lg:    8px;

  --line-h:       44px;
  --header-h:     58px;
  --bar-h:        46px;
  --side-w:       clamp(280px, 22vw, 380px);
  --side-wide-w:  clamp(170px, 12vw, 220px);
  --shadow:       0 6px 22px -10px rgba(40,36,28,0.30);
}

[data-theme="dark"] {
  --bg:           #1c1b17;
  --bg-panel:     #232118;
  --bg-sunken:    #16150f;
  --ink:          #ece8dc;
  --ink-soft:     #b3afa3;
  --ink-dim:      #837f73;
  --rule:         #3a372d;
  --rule-strong:  #524d3f;
  --accent:       #d9b860;
  --accent-ink:   #e8cf86;
  --accent-soft:  #4a3f22;
  --margin-red:   #8a4f4f;
  --margin-green: #4f6f4f;
  --rule-line:    #2f3b48;
}

/* ── Reset & basis ───────────────────────────────────────────────────── */
* { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

html, body {
  height: 100%;
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body { overflow: hidden; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 500; }
button { font-family: inherit; cursor: pointer; color: inherit; }

/* ── App-frame ───────────────────────────────────────────────────────── */
.app { display: flex; flex-direction: column; height: 100vh; }

/* ── Header (licht, zoals authortool) ────────────────────────────────── */
.app-header {
  flex-shrink: 0;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 16px 28px 13px;
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
  z-index: 50;
}

.brand { display: flex; align-items: baseline; gap: 12px; }

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 32px;
  color: var(--accent);
  transform: translateY(4px);
  flex-shrink: 0;
}
.brand-mark svg { width: 36px; height: 32px; display: block; }

.brand h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.brand-sub {
  font-family: var(--font-ui);
  font-weight: 400;
  font-size: 14px;
  color: var(--ink-dim);
  margin-left: 4px;
  letter-spacing: 0.02em;
}

/* Taalkiezer in de header (i18n) */
.lang-select {
  align-self: center;
  margin-left: auto;
  margin-right: 10px;
  font-family: var(--font-ui);
  font-size: 12px;
  padding: 4px 8px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--bg-panel);
  color: var(--ink);
  cursor: pointer;
}
.lang-select:hover { border-color: var(--rule-strong); }

.header-settings-btn {
  align-self: center;
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--ink-dim);
  transition: color .15s, border-color .15s, background .15s;
}
.header-settings-btn svg { width: 19px; height: 19px; }
.header-settings-btn:hover {
  color: var(--ink);
  border-color: var(--rule-strong);
  background: var(--bg-sunken);
}

/* ── App body ────────────────────────────────────────────────────────── */
.app-body { flex: 1; display: flex; min-height: 0; }

/* ── Zijbalken ───────────────────────────────────────────────────────── */
.side {
  width: var(--side-w);
  flex-shrink: 0;
  background: var(--bg-panel);
  color: var(--ink);
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.side-wide { width: var(--side-wide-w); }
.side-right { border-right: none; border-left: 1px solid var(--rule); }
/* Resultaat even breed als Opgaven (overschrijft side-wide) */
.side-right.side-wide { width: var(--side-w); }

/* Versleepbare kolomgrens tussen Opgaven|schrift en schrift|Resultaat.
   De Batches-kolom heeft GEEN resizer en blijft dus vast. Een geslepen breedte
   wordt als inline-width op de aside gezet (overschrijft var(--side-w)). */
.col-resizer {
  flex: 0 0 6px;
  align-self: stretch;
  cursor: col-resize;
  background: transparent;
  transition: background .12s;
  z-index: 5;
}
.col-resizer:hover,
.col-resizer.dragging { background: var(--accent-soft); }

.side-head {
  padding: 15px 16px 11px;
  border-bottom: 1px solid var(--rule);
  flex-shrink: 0;
}
.side-head h2 {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}
.side-head p { font-size: 12px; color: var(--ink-dim); margin-top: 2px; }

.side-empty, .side-loading, .opg-loading {
  padding: 18px 16px;
  font-size: 13px;
  color: var(--ink-dim);
  font-style: italic;
}

.side-foot {
  padding: 8px 16px;
  font-size: 11.5px;
  color: var(--ink-dim);
  border-top: 1px solid var(--rule);
  text-align: center;
  flex-shrink: 0;
}

/* Opgavenlijst: boxes met dunne rand, vulkleur = schermkleur, gelijke breedte */
.opg-list { flex: 1; overflow-y: auto; padding: 12px; min-height: 0; }

.opg {
  width: 100%;
  padding: 6px 12px;
  margin-bottom: 15px;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .12s, background .12s, transform .06s;
}
.opg:last-child { margin-bottom: 4px; }
.opg:hover { border-color: var(--rule-strong); }
.opg:active { transform: translateY(1px); }
.opg.active {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.opg-head { margin-bottom: 8px; }

/* Batch-rechthoeken in de linker kolom — zelfde stijl als opgave-boxes */
.batch-list { padding: 12px; }
.batch-item {
  width: 100%;
  padding: 12px 12px;
  margin-bottom: 15px;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 14px;
  color: var(--ink);
  transition: border-color .12s, background .12s, transform .06s;
}
.batch-item:hover { border-color: var(--rule-strong); }
.batch-item:active { transform: translateY(1px); }
.batch-item.active {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

/* nummer: klassiek (Fraunces), klein, blauw */
.opg-id {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 12.5px;
  color: #1a6fc4;
  letter-spacing: 0.01em;
}

/* preview: links uitgelijnd, vaste breedte, schermkleur-achtergrond,
   afgekapt als de opgave breder is dan de box */
.opg-preview {
  display: block;
  width: 100%;
  overflow: hidden;
  background: var(--bg);
  padding: 4px 0;
  min-height: 40px;
}
.opg-preview math-field {
  display: block;
  background: transparent;
  border: none;
  max-width: 100%;
  font-size: 16px;
  --smart-fence-color: var(--ink);
}
.opg-preview svg, .opg-preview img { max-width: 100%; height: auto; display: block; }
.opg-preview-fallback { color: var(--ink-dim); font-size: 14px; }

.refresh-btn { transition: background .12s, border-color .12s; }
.refresh-btn:hover { background: var(--bg-sunken) !important; border-color: var(--rule-strong) !important; }

/* ── Midden: scroll + paneel + balk ──────────────────────────────────── */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  background: var(--bg-sunken);
}

.scroll { flex: 1; overflow-y: auto; padding: 24px; min-height: 0; }

/* ── De "pagina" (schrift) — lijnen altijd zichtbaar via achtergrond ──── */
.page {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  min-height: 100%;
  background-color: var(--bg-panel);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0 40px 60px;
  overflow: hidden;
}

/* Liniaallijnen: liggen op een aparte laag binnen de page, beginnen 20px van
   de linkerrand, lopen tot de rechterrand, en starten verticaal pas op de
   eerste schrijfregel (--page-lines-top) zodat er GEEN lijnen boven de
   knoppenbalk verschijnen. */
.page::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 40px;
  top: var(--page-lines-top, 130px);
  bottom: 0;
  pointer-events: none;
  z-index: 1;
  /* Laag 1 (bovenop): de EERSTE lijn groen — een enkele 2px groene lijn op
     de onderrand van de eerste regel (knoppenbalk-regel), niet herhalend.
     Laag 2: de gewone grijze liniaallijnen, herhalend. */
  background-image:
    linear-gradient(var(--margin-green), var(--margin-green)),
    repeating-linear-gradient(
      to bottom,
      transparent,
      transparent calc(var(--line-h) - 1px),
      var(--rule-line) calc(var(--line-h) - 1px),
      var(--rule-line) var(--line-h)
    );
  background-position:
    0 calc(var(--line-h) - 2px),
    0 0;
  background-size:
    100% 2px,
    100% 100%;
  background-repeat:
    no-repeat,
    repeat-y;
}

/* ── PROBEERSEL: liniaallijnen laten MEEGROEIEN met de rijhoogte ──────────
   Terug te draaien in één stap: verwijder de class "lines-per-row" op
   <div class="page"> in werkblad.html (dan vallen de regels hieronder weg en
   keert de vaste-periode liniatuur terug). Probleem: de repeating-gradient
   hierboven heeft een VASTE periode (--line-h), maar de .rl-rijen groeien mee
   met hoge expressies → cumulatieve drift t.o.v. de lijnen. Oplossing: teken
   de grijze liniaallijn als onderrand PER .rl-rij (groeit mee), en laat
   .page::after alleen nog de groene kopstreep tekenen. De rode kantlijn
   (.page::before), de gaatjes (.holes) en de actieve-regel-highlight
   (.rl.active, mustard gradient) blijven ongemoeid. */
.page.lines-per-row::after {
  background-image: linear-gradient(var(--margin-green), var(--margin-green));
  background-position: 0 calc(var(--line-h) - 2px);
  background-size: 100% 2px;
  background-repeat: no-repeat;
}
.page.lines-per-row .rl {
  border-bottom: 1px solid var(--rule-line);
}
/* Eerste regel (knoppenbalk): geen grijze onderrand — daar ligt de groene
   kopstreep van ::after al. */
.page.lines-per-row .rl:first-child {
  border-bottom: none;
}

/* Rode kantlijn: 2px vóór de linkerkant van de knoppenbalk (die op 92px
   t.o.v. de pagerand staat) → op 90px. Loopt mee vanaf de eerste regel. */
.page::before {
  content: "";
  position: absolute;
  left: 90px;
  top: 50px;                 /* begin 50px vanaf de bovenkant van het werkblad */
  bottom: 0;
  width: 0;
  border-left: 2px solid var(--margin-red);
  pointer-events: none;
  z-index: 2;
}

/* Perforatiegaatjes — gelijkmatig verdeeld: midden + symmetrisch boven/onder */
.holes {
  position: absolute;
  top: 12%; bottom: 12%; left: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;   /* drie gaten: boven, midden, onder gelijk verdeeld */
  pointer-events: none;
  z-index: 2;
}
.holes span {
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--bg-sunken);
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.20);
}
[data-theme="dark"] .holes span { background: #0e0d09; }

/* Naam-veld — net boven de eerste schrijfregel, rechts uitgelijnd */
.naam-bar {
  position: absolute;
  z-index: 4;
  top: calc(var(--page-lines-top, 130px) - 34px);
  right: 40px;
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--ink-soft);
  text-align: right;
}

/* Opgavenummer — op DEZELFDE regel als 'Naam:' (zelfde top), links uitgelijnd met
   de expressie-inhoud van de regels eronder. Absolute posities meten vanaf de
   padding-box van .page (padding-left 40px), maar de regel-inhoud (normale flow)
   begint ná die padding: 40 (.page) + 56 (.rules margin) + 6 (.rl padding) = 102px
   — dus 12px rechts van de rode kantlijn (op 90px), net als de expressies. */
.opgave-nr {
  position: absolute;
  z-index: 4;
  top: calc(var(--page-lines-top, 130px) - 34px);
  left: 102px;
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--ink-soft);
}

/* Knoppenbalk — op de eerste schrijfregel, 3px ruimte boven en onder.
   De regelhoogte is --line-h (38px); de balk wordt 38 - 6 = 32px hoog. */
.quick-buttons {
  position: absolute;
  z-index: 4;
  top: calc(var(--page-lines-top, 130px) + 1px);
  left: 92px;
  right: 40px;
  height: calc(var(--line-h) - 6px);
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: nowrap;
  padding: 0 6px;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
}

/* Groene kop-streep — ligt mee als gewone scheidslijn (niet meer nodig als
   losse balk, maar we houden het element verborgen zodat de HTML klopt) */
.green-bar { display: none; }

.qb {
  min-width: 28px; height: 26px;
  padding: 0 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  background: var(--bg-panel);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--ink);
  flex-shrink: 0;
  transition: background .12s, border-color .12s, transform .06s;
}
.qb:hover { background: var(--accent-soft); border-color: var(--accent); }
.qb:active { transform: translateY(1px); }
.qb-icon { font-size: 14px; }
.qb-sub  { font-size: 9px; align-self: flex-end; color: var(--ink-soft); }
.qb-base { font-size: 12px; }
.qb-sup  { font-size: 9px; align-self: flex-start; }
.qb-pi   { font-size: 14px; }
.qb-pm   { font-size: 17px; font-weight: 600; }
.qb-frac {
  display: inline-flex; flex-direction: column; align-items: center;
  line-height: 1; font-size: 9px;
}
.qb-frac-top { border-bottom: 1.5px solid currentColor; padding: 0 3px 1px; }
.qb-frac-bot { padding: 1px 3px 0; }
.qb-sep { width: 1px; height: 16px; background: var(--rule); margin: 0 3px; flex-shrink: 0; }

/* ── Regels (notebook lines) ─────────────────────────────────────────── */
.rules {
  position: relative;
  z-index: 3;
  margin-left: 56px;
  padding-top: var(--page-lines-top, 130px);
}

.rl {
  position: relative;
  display: flex;
  align-items: center;
  min-height: var(--line-h);
  padding: 2px 0 2px 6px;
  box-sizing: border-box;
}
.rl.active {
  background: linear-gradient(90deg, rgba(174,122,21,0.07), transparent 60%);
}
.rl .editor {
  flex: 1;
  min-height: calc(var(--line-h) - 4px);
  font-size: 17px;
  border: none;
  background: transparent;
  outline: none;
  --mathfield-caret-color: var(--accent);
}
math-field, .editor { font-size: 17px; }

/* Regel 1 van de opgave: de begin-expressie gerenderd in blauw, READ-ONLY
   (alleen ter info; de student werkt op de kopie eronder). */
.opgave-mf {
  flex: 1;
  font-size: 17px;
  color: #1a6fc4;
  pointer-events: none;
  --mf-color: #1a6fc4;
  background: transparent;
  border: none;
}
.opgave-label { color: #1a6fc4; font-size: 17px; }

/* Regel 5: opgavenummer (blauw) + opdracht + expressie, netjes op één regel */
.rl-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 12.5px;
  color: #1a6fc4;
  letter-spacing: 0.01em;
  margin-left: 4px;
}
.rl-opgave {
  font-family: var(--font-display);
  font-size: 12.5px;
  color: var(--accent-ink);
  margin-right: 4px;
}
.expr-mf {
  display: inline-block;
  background: transparent;
  border: none;
  font-size: 17px;
  vertical-align: middle;
  --smart-fence-color: var(--ink);
}

.lf-btn {
  flex-shrink: 0;
  margin-left: 8px;
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--bg);
  background: var(--ok);
  border: none;
  border-radius: var(--radius);
  transition: filter .12s, transform .06s;
}
.lf-btn:hover { filter: brightness(1.08); }
.lf-btn:active { transform: translateY(1px); }

/* Klaar-boodschap achter de uitkomst zodra de opgave voltooid is (geen LF meer). */
.klaar-badge {
  flex-shrink: 0;
  margin-left: 16px;
  padding: 4px 12px;
  font-family: var(--font-ui);
  font-size: 12.5px;
  font-weight: 600;
  color: #f2d94e;            /* gele letters */
  background: #579a6b;       /* lichter groen dan --ok (#2f6d3f) */
  border-radius: var(--radius);
  white-space: nowrap;
}

/* abc-fork: badge op ELKE spoor-regel ("uitrekenen spoor +/−"). Absoluut
   gepositioneerd links-van-midden zodat hij op elke regel op dezelfde plek staat
   en zich per spoor herhaalt. +spoor goud, −spoor groen. */
.spoor-badge {
  position: absolute;
  left: 280px;
  top: 50%;
  transform: translateY(-50%);
  padding: 2px 10px;
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  border: 1px solid transparent;
  border-radius: var(--radius);
  white-space: nowrap;
  pointer-events: none;
}
.spoor-plus {
  color: var(--accent-ink);
  background: var(--accent-soft);
  border-color: var(--accent);
}
.spoor-min {
  color: #2f5d4a;
  background: #dcebe2;
  border-color: #4f8a6a;
}
/* abc-fork: hint-markering over het ±-teken bij de splitsing in twee sporen */
.split-hint-box {
  border: 2px solid var(--accent);
  background: rgba(174, 122, 21, 0.15);
  border-radius: 4px;
}

/* ── abc-fork: verticale split — twee kolommen naast elkaar (+ links, − rechts) ── */
.split-container {
  display: flex;
  align-items: flex-start;
  margin: 2px 0;
  position: relative;
}
.split-col {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 0 14px;
}
.split-col-head {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  padding: 2px 0 4px;
}
.split-plus .split-col-head { color: var(--accent-ink); }
.split-min  .split-col-head { color: #2f5d4a; }
.split-divider {
  flex: 0 0 2px;
  align-self: stretch;
  background: var(--rule-strong);
  margin: 0 6px;
}
.split-row {
  display: flex;
  align-items: center;
  min-height: var(--line-h);
  padding: 2px 0 2px 22px;
  border-bottom: 1px solid var(--rule-line);
  position: relative;
}
/* Vinkje/kruisje links in de kolom-regel */
.split-check {
  position: absolute;
  left: 2px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  font-weight: 700;
}
.split-check.goed { color: var(--ok); }
.split-check.fout { color: var(--err); }
.split-row.active {
  background: linear-gradient(90deg, rgba(174, 122, 21, 0.07), transparent 60%);
}
.split-min .split-row.active {
  background: linear-gradient(90deg, rgba(79, 138, 106, 0.10), transparent 60%);
}
.split-editor { flex: 1; min-height: calc(var(--line-h) - 4px); font-size: 17px; }

/* knoppenbalk: "splits ±" (actie) en "S = { }" (insert) */
.qb-splits-label, .qb-set {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  padding: 0 4px;
}
.qb-splits { color: var(--accent-ink); }

.margin-mark {
  position: absolute;
  left: -76px;               /* gecentreerd in de kolom tussen lijnen-start en kantlijn */
  top: 50%;
  transform: translateY(-50%);
  font-size: 15px;
  font-weight: 700;
  width: 70px;
  text-align: center;
}
.margin-mark.fout { color: var(--err); }
.margin-mark.goed { color: var(--ok); }

.empty-state {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 70px 20px;
  color: var(--ink-dim);
  font-size: 15px;
  font-style: italic;
}
.empty-state .icon { font-size: 32px; font-style: normal; }

/* ── Toetsenbord-paneel ──────────────────────────────────────────────── */
.kb-panel {
  flex-shrink: 0;
  background: var(--bg-panel);
  border-top: 1px solid var(--rule);
  padding: 8px 12px;
  display: none;
}
.kb-panel.open { display: block; }
.kb-grid { display: flex; flex-wrap: wrap; gap: 6px; max-width: 560px; margin: 0 auto; }
.kb-key {
  min-width: 40px; height: 38px;
  padding: 0 10px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-panel);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 17px;
  user-select: none;
  transition: background .12s, transform .06s;
}
.kb-key:hover { background: var(--accent-soft); }
.kb-key:active { transform: translateY(1px); }

/* ── Statusbalk (licht) ──────────────────────────────────────────────── */
.bar {
  flex-shrink: 0;
  height: var(--bar-h);
  background: var(--bg-panel);
  color: var(--ink-soft);
  border-top: 1px solid var(--rule);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  gap: 12px;
}
.bar-l { display: flex; align-items: center; gap: 16px; font-size: 12.5px; }
.bar-r { display: flex; align-items: center; gap: 8px; }

.bar .dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--ink-dim);
  margin-right: 7px;
  flex-shrink: 0;
}
.bar .dot.ok { background: var(--ok); }
.bar .dot.er { background: var(--err); }
.bar .dot.warn { background: var(--warn); }

#line-info, #block-info { font-family: var(--font-mono); font-size: 12px; }
#block-info { color: var(--accent-ink); font-weight: 600; }

.bar-btn {
  padding: 6px 12px;
  font-family: var(--font-ui);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink-soft);
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  transition: background .12s, border-color .12s, color .12s;
  white-space: nowrap;
}
.bar-btn:hover { background: var(--bg-sunken); border-color: var(--rule-strong); color: var(--ink); }
.bar-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ── Overlays (hints, pinpoint, schema) ──────────────────────────────── */
.hints-overlay, .pinpoint-overlay, .svg-overlay {
  position: fixed; inset: 0;
  background: rgba(28,31,38,0.40);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 24px;
}
.hints-overlay.open, .pinpoint-overlay.open, .svg-overlay.open { display: flex; }

.hints-popup, .pinpoint-popup, .svg-popup {
  background: var(--bg);
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  max-width: 460px; width: 100%;
  max-height: 80vh;
  overflow: hidden;
  display: flex; flex-direction: column;
  animation: pop-in .16s ease-out;
}
.svg-popup { max-width: 760px; }
@keyframes pop-in {
  from { opacity: 0; transform: translateY(8px) scale(.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.hints-header, .pinpoint-header, .svg-header {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--rule);
  background: var(--bg-panel);
}
.hints-header h3, .pinpoint-header h3, .svg-header h3 {
  font-size: 15px; flex: 1; color: var(--ink);
}
.step-badge, .hints-step-badge {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  padding: 3px 9px;
  background: var(--accent-soft);
  color: var(--accent-ink);
  border-radius: 999px;
}
.hints-close, .svg-close, .dialog-close {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  background: transparent; border: none;
  border-radius: var(--radius);
  font-size: 18px; color: var(--ink-dim);
  transition: background .12s, color .12s;
}
.hints-close:hover, .svg-close:hover, .dialog-close:hover {
  background: var(--bg-sunken); color: var(--ink);
}
.hints-body, .pinpoint-body, .svg-body { padding: 16px; overflow-y: auto; }

.hint-sectie-titel {
  font-size: 11.5px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em;
  margin: 4px 0 8px;
}
.hint-sectie-titel.hoog { color: var(--err); }
.hint-sectie-titel.laag { color: var(--accent-ink); }
.hint-item {
  padding: 10px 12px; margin-bottom: 8px;
  background: var(--bg-panel);
  border-left: 3px solid var(--ink-dim);
  border-radius: var(--radius);
  font-size: 13.5px; line-height: 1.4;
}
.hint-item.hoog { border-left-color: var(--err); background: var(--err-soft); }
.hint-item.laag { border-left-color: var(--accent); background: var(--accent-soft); }
.hint-leeg { color: var(--ink-dim); font-style: italic; font-size: 13px; }

.pinpoint-btn {
  margin-top: 12px; padding: 8px 16px;
  background: var(--ink); color: var(--bg);
  border: none; border-radius: var(--radius);
  font-size: 13px; font-weight: 500;
}
.pinpoint-btn:hover { background: var(--accent-ink); }

/* ── Settings-dialog ─────────────────────────────────────────────────── */
.dialog-overlay {
  position: fixed; inset: 0;
  background: rgba(28,31,38,0.40);
  display: flex; align-items: center; justify-content: center;
  z-index: 300; padding: 24px;
}
.dialog {
  background: var(--bg);
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  max-width: 440px; width: 100%;
  overflow: hidden;
  animation: pop-in .16s ease-out;
}
.dialog-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--rule);
  background: var(--bg-panel);
}
.dialog-head h2 { font-size: 16px; color: var(--ink); }
.dialog-body { padding: 18px; }
.dialog-foot {
  padding: 12px 18px;
  border-top: 1px solid var(--rule);
  display: flex; justify-content: flex-end;
  background: var(--bg-panel);
}
.setting-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.setting-label { font-size: 14px; font-weight: 500; }
.setting-help { font-size: 12px; color: var(--ink-dim); margin-top: 2px; }

.theme-toggle { display: flex; gap: 6px; }
.theme-toggle button {
  display: flex; align-items: center; gap: 6px;
  padding: 7px 12px; font-size: 12.5px;
  background: var(--bg-panel);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  color: var(--ink-soft);
  transition: background .12s, border-color .12s, color .12s;
}
.theme-toggle button svg { width: 15px; height: 15px; }
.theme-toggle button:hover { background: var(--bg-sunken); }
.theme-toggle button.active {
  background: var(--accent-soft); border-color: var(--accent); color: var(--accent-ink);
}

.btn {
  font-family: var(--font-ui);
  font-size: 14px; font-weight: 500;
  padding: 8px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: var(--bg-panel);
  color: var(--ink);
  transition: background .15s, border-color .15s, transform .1s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn-primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); }

/* ── Scrollbars ──────────────────────────────────────────────────────── */
.opg-list::-webkit-scrollbar, .scroll::-webkit-scrollbar,
.hints-body::-webkit-scrollbar { width: 9px; }
.opg-list::-webkit-scrollbar-thumb, .scroll::-webkit-scrollbar-thumb,
.hints-body::-webkit-scrollbar-thumb { background: rgba(140,135,120,0.4); border-radius: 6px; }
.opg-list::-webkit-scrollbar-thumb:hover, .scroll::-webkit-scrollbar-thumb:hover { background: rgba(140,135,120,0.6); }

/* ── Toegankelijkheid ────────────────────────────────────────────────── */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

/* ── Responsief ──────────────────────────────────────────────────────── */
@media (max-width: 1100px) { .side-wide { display: none; } }
@media (max-width: 820px) {
  .side { width: 200px; }
  .bar-btn { padding: 6px 9px; font-size: 11.5px; }
}
