/* ============================================================
   endgame.css — app-specifieke opmaak van EndgamePrep: bord,
   zijbalk, zettenlijst en de vensters van het spel. Header,
   knoppen, info-venster en footer komen uit style.css; de kleuren
   en lettertypen zijn de tokens uit style.css.
   ============================================================ */

:root {
  /* Vakgrootte = max(ondergrens, min(maximum, hoogte-limiet, breedte-limiet)).
     --chrome-h: hoogte van header, footer, paddings, doel/status en knoppen samen,
     plus vaste ruimte voor drie regels conceptuitleg (zo blijft het bord bij
     matzetten en concepten even groot).
     Breedte: de inhoud is nooit breder dan --max-width (style.css), daarvan af:
     main-padding 28 + gaps 24 + zijbalk + zettenlijst + ranklabels 22
     + padding bordkaart 20 = 534px */
  --chrome-h: 380px;
  --sq: max(44px, min(90px, calc((100vh - var(--chrome-h)) / 8), calc((min(100vw, var(--max-width)) - 534px) / 8)));
  --board: calc(8 * var(--sq));
  /* Houten bord: per veld een houttegel (images/bord), geschaald naar de
     veldgrootte; de kleuren zijn de terugval als een tegel niet laadt */
  --tile-light: url('../images/bord/light.png');
  --tile-dark:  url('../images/bord/dark.png');
  --white-sq:   #f0d9b5;
  --black-sq:   #b58863;
  --sel:        rgba(20, 85, 30, 0.55);
  --last:       rgba(155, 199, 0, 0.40);
  --sidebar-w:  220px;
  --info-w:     220px;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--parchment-mid); }
::-webkit-scrollbar-thumb { background: var(--rule); border-radius: 3px; }
* { scrollbar-width: thin; scrollbar-color: var(--rule) var(--parchment-mid); }

/* Op de computer past alles in één scherm: het bord schaalt mee, niets scrollt */
body {
  height: 100vh;
  overflow: hidden;
}

/* style.css zet display op .btn; het hidden-attribuut moet blijven werken */
.btn[hidden] { display: none; }

/* ── HOOFDINDELING: drie perkamentkaarten op het hout ───────────────────────── */
main {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr var(--info-w);
  gap: 12px;
  overflow: hidden;
  min-height: 0;
  padding: 12px 14px;
  max-width: var(--max-width);
  line-height: normal;
}

#sidebar,
#boardArea,
#infoPanel {
  background: var(--parchment);
  border: 1px solid var(--parchment-dark);
  border-radius: 2px;
  box-shadow: 0 6px 26px rgba(0, 0, 0, 0.42);
  padding: 10px;
  min-height: 0;
}

/* ── ZIJBALK ────────────────────────────────────────────────────────────────── */
#sidebar {
  overflow: hidden;          /* de lange panelen scrollen zelf */
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Panelen: Matzetten vast, Pionnen- en Toreneindspel delen de rest met eigen scrollbalk */
.sidebar-panel { display: flex; flex-direction: column; gap: 4px; min-height: 0; }
.panel-fixed { flex: none; }
.panel-scroll { flex: 1 1 0; }
.panel-scroll .panel-body { overflow-y: auto; min-height: 0; padding-right: 2px; }

/* Keuzelijst alleen op mobiel */
#mobilePicker { display: none; }
#exerciseSelect {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 8px 10px;
  border: 1px solid var(--rule-heavy);
  border-radius: 3px;
  background: var(--parchment);
  color: var(--ink);
}

.sidebar-section { display: flex; flex-direction: column; gap: 6px; }

.section-title {
  font-family: var(--font-ui);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-light);
  padding-bottom: 4px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 2px;
}

.diff-group-label {
  font-family: var(--font-ui);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  margin-top: 6px;
  margin-bottom: 2px;
}

.endgame-item,
.color-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 6px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 0.82rem;
  transition: background 0.12s;
  border: 1px solid transparent;
}
.endgame-item:hover,
.color-item:hover { background: var(--parchment-dark); }
.endgame-item:has(input:checked),
.color-item:has(input:checked) {
  background: var(--parchment-dark);
  border-color: var(--gold);
}
.endgame-item input,
.color-item input { display: none; }

.piece-icons { display: flex; align-items: center; gap: 1px; flex-shrink: 0; }
.piece-icons img { width: 22px; height: 22px; object-fit: contain; display: block; }

/* Vaste breedte voor witte stukken (3 × 22px + 2 × 1px gap = 68px), links uitgelijnd;
   zo staan de scheidingsstreep en de zwarte koning in alle rijen onder elkaar */
.endgame-item > span:nth-child(2) {
  width: 68px;
}

.vs-sep {
  flex-shrink: 0;
  width: 1px;
  height: 16px;
  background: var(--rule);
}

/* Concepten */
.concept-list { display: flex; flex-direction: column; gap: 1px; }
/* Lange namen (vooral in het Duits) mogen over twee regels */
.concept-item { line-height: 1.3; }
.endgame-item.concept-item > .concept-name { width: auto; }

/* Kleurkiezer */
#colorMenu { display: flex; flex-direction: column; gap: 4px; }
.color-item { gap: 7px; padding: 5px 8px; }
.color-item img { width: 22px; height: 22px; object-fit: contain; flex-shrink: 0; }

/* ── BORD ───────────────────────────────────────────────────────────────────── */
#boardArea {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  min-width: 0;
}

/* Bord met ranklabels links en lijnlabels eronder */
#boardWrap {
  display: grid;
  grid-template-areas:
    "ranks board"
    ".     files";
  grid-template-columns: 22px var(--board);
  grid-template-rows: var(--board) 22px;
  user-select: none;
}

.rank-labels {
  grid-area: ranks;
  display: flex;
  flex-direction: column;
}
.rank-labels span {
  height: var(--sq);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 4px;
  font-size: 0.68rem;
  color: var(--ink-light);
  font-family: var(--font-ui);
}

.file-labels {
  grid-area: files;
  display: flex;
}
.file-labels span {
  width: var(--sq);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 3px;
  font-size: 0.68rem;
  color: var(--ink-light);
  font-family: var(--font-ui);
}

.chessboard {
  grid-area: board;
  display: grid;
  grid-template-columns: repeat(8, var(--sq));
  grid-template-rows: repeat(8, var(--sq));
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  position: relative;
}

.chessboard::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 2px solid var(--rule-heavy);
  pointer-events: none;
  z-index: 1;
}

.sq {
  width: var(--sq);
  height: var(--sq);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  /* Twee lagen: markering (--hl, gekozen veld of laatste zet) over de houttegel */
  background-image: var(--hl, none), var(--tile);
  background-size: cover;
  background-position: center;
}
/* --dot: kleur van de stippen voor mogelijke zetten; licht op donker hout */
.sq.light { background-color: var(--white-sq); --tile: var(--tile-light); --dot: rgba(0, 0, 0, 0.30); }
.sq.dark  { background-color: var(--black-sq); --tile: var(--tile-dark);  --dot: rgba(255, 240, 215, 0.45); }

.sq.selected  { --hl: linear-gradient(var(--sel), var(--sel)); }
.sq.last-from,
.sq.last-to   { --hl: linear-gradient(var(--last), var(--last)); }

/* Mogelijke zetten */
.sq.possible::after {
  content: '';
  position: absolute;
  width: 30%;
  height: 30%;
  border-radius: 50%;
  background: var(--dot);
  pointer-events: none;
}
.sq.possible.cap::after {
  width: 90%;
  height: 90%;
  border-radius: 50%;
  background: transparent;
  border: 4px solid var(--dot);
}

/* Vluchtroutes: rode stip op de velden waar de koning van de tegenstander heen kan */
.sq.escape::before {
  content: '';
  position: absolute;
  width: 28%;
  height: 28%;
  border-radius: 50%;
  background: rgba(210, 40, 40, 0.70);
  pointer-events: none;
  z-index: 2;
}

.piece {
  width: 88%;
  height: 88%;
  object-fit: contain;
  pointer-events: none;
  display: block;
}

.drag-ghost {
  position: fixed;
  width: var(--sq);
  height: var(--sq);
  object-fit: contain;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  filter: drop-shadow(2px 4px 6px rgba(0, 0, 0, 0.5));
}

/* Doel, uitleg en status onder het bord, even breed als het bord */
#goalText,
#conceptText,
#statusBar {
  width: calc(var(--board) + 24px);
  max-width: 100%;
}
#goalText {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink);
  min-height: 1em;
}
#conceptText {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.4;
  color: var(--ink-mid);
}
#statusBar {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 22px;
}
#statusText {
  font-size: 0.78rem;
  color: var(--ink-mid);
  font-style: italic;
  flex: 1;
}
.thinking {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--gold);
  animation: pulse 1.2s ease-in-out infinite;
}
.thinking.hidden { display: none; }
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* Knoppen onder het bord: de volle breedte van de kaart, gecentreerd, zodat ze
   ook bij een klein bord op twee regels passen; compacter dan de standaard .btn */
#boardControls {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
  margin-top: 4px;
}
.control-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 10px;
  align-items: center;
}
#boardControls .btn {
  height: 32px;
  padding: 0 10px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
#boardControls .btn[hidden] { display: none; }

.btn-escape.escape-active {
  background: rgba(180, 30, 30, 0.12);
  border-color: rgba(180, 30, 30, 0.55);
  color: #b01e1e;
}

/* Hint: toont even de zet zelf (SAN, dus geen hoofdletters afdwingen) */
.btn-hint { min-width: 110px; justify-content: center; }
.btn-hint.hint-active {
  background: var(--burgundy);
  color: var(--parchment);
  border-color: var(--burgundy);
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: none;
}

/* ── ZETTENLIJST ────────────────────────────────────────────────────────────── */
#infoPanel {
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#moveList {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  line-height: 1.6;
  flex: 1;
  overflow-y: auto;
  word-break: break-word;
}
.move-row { display: flex; align-items: baseline; gap: 2px; padding: 1px 0; }
.move-num { color: var(--ink-light); font-size: 0.72rem; min-width: 22px; }
.move {
  padding: 1px 4px;
  border-radius: 2px;
  margin: 1px 2px 1px 0;
  cursor: default;
}
.move.user-move { color: var(--burgundy); font-weight: 700; }
.move.comp-move { color: var(--ink-mid); }
.move.clickable { cursor: pointer; }
.move.clickable:hover { background: var(--parchment-dark); }

.move.browsing {
  background: var(--gold-light);
  color: var(--ink);
  font-weight: 700;
  border-radius: 3px;
  outline: 1px solid var(--gold);
}

/* ── VENSTERS VAN HET SPEL (opbouw .sm-overlay/.sm-modal uit style.css) ─────── */
.game-modal { text-align: center; }
.modal-icon { font-size: 2.2rem; margin-bottom: 8px; line-height: 1.2; }
.modal-text { font-size: 0.92rem; color: var(--ink-mid); margin-bottom: 8px; line-height: 1.5; }
.modal-sub  { font-size: 0.82rem; color: var(--ink-light); margin-bottom: 16px; line-height: 1.5; }
.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 18px;
}

/* Promotie */
.promo-options {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 12px;
}
.promo-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  border: 1px solid var(--rule-heavy);
  background: var(--parchment-mid);
  border-radius: 3px;
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--ink-mid);
  transition: border-color 0.12s, background 0.12s;
}
.promo-btn:hover { border-color: var(--gold); background: var(--parchment-dark); }
.promo-piece { width: 52px; height: 52px; display: block; }

/* ── TOAST ──────────────────────────────────────────────────────────────────── */
#toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--ink);
  color: var(--parchment);
  padding: 9px 20px;
  border-radius: 3px;
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  z-index: 2000;
  white-space: nowrap;
}
#toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── RESPONSIEF ─────────────────────────────────────────────────────────────── */
/*
  Breekpunten (zijbalk en zettenlijst altijd even breed):
    > 960px   desktop   220 + 220px,  max. 90px vakjes
    801-960px tablet L  175 + 175px,  60px vakjes
    701-800px tablet S  145 + 145px,  50px vakjes
    ≤ 700px   mobiel    flex-kolom,   fluid bord
  breedte-constante = 28 + 24 + zijbalk + zettenlijst + 22 + 20
*/

@media (max-width: 960px) {
  :root {
    --sidebar-w: 175px;
    --info-w:    175px;
    --sq: max(44px, min(60px, calc((100vh - var(--chrome-h)) / 8), calc((min(100vw, var(--max-width)) - 444px) / 8)));
  }
}

@media (max-width: 800px) {
  :root {
    --sidebar-w: 145px;
    --info-w:    145px;
    --sq: max(44px, min(50px, calc((100vh - var(--chrome-h)) / 8), calc((min(100vw, var(--max-width)) - 384px) / 8)));
  }
  /* Smalste zijbalk: koppen met minder letterafstand, anders vallen ze buiten de kaart */
  .section-title { letter-spacing: 0.08em; }
}

/* Lage schermen (laptops): compactere header en footer, meer hoogte voor het bord */
@media (min-width: 701px) and (max-height: 800px) {
  :root { --chrome-h: 350px; }
  .site-header { padding: 4px 20px; }
  .header-logo-icon { width: 40px; height: 40px; }
  .site-footer { padding: 0.4rem 1rem 0.35rem; }
}

/* Nog lager: het bord blijft minstens 44px per veld; de pagina mag dan scrollen
   in plaats van dat knoppen onder de kaart wegvallen */
@media (min-width: 701px) and (max-height: 702px) {
  body { height: auto; min-height: 100vh; overflow-y: auto; }
}

/* Mobiel (≤ 700px) */
@media (max-width: 700px) {
  :root {
    /* 50 = main-padding 12 + kaartpadding en rand 10 + ranklabels 18 + speling 10 */
    --sq: clamp(36px, calc((100vw - 50px) / 8), 52px);
  }

  body {
    height: auto;
    min-height: 100dvh;
    overflow-y: auto;
  }

  main {
    display: flex;
    flex-direction: column;
    padding: 6px;
    gap: 6px;
    overflow: visible;
  }

  /* Boven het bord: "Speel als" en één keuzelijst; de panelen vervallen */
  #sidebar {
    padding: 8px 10px;
    overflow: visible;
    flex-shrink: 0;
    gap: 8px;
  }
  .sidebar-panel { display: none; }
  #mobilePicker { display: flex; }

  #boardArea { padding: 8px 4px; }

  /* Ranklabels iets smaller */
  #boardWrap { grid-template-columns: 18px var(--board); }
  .rank-labels span { padding-right: 2px; font-size: 0.6rem; }
  .file-labels span { font-size: 0.6rem; }

  /* Grotere touch-targets */
  #boardControls .btn { height: 40px; min-width: 40px; font-size: 0.82rem; padding: 0 12px; }

  #boardControls { margin-top: 6px; }
  .control-row { justify-content: center; gap: 6px; }

  /* Zettenlijst als compacte strip onder het bord */
  #infoPanel { max-height: 150px; flex-shrink: 0; }

  #toast { bottom: 16px; }

  /* Kleurkiezer: compacte rij */
  #colorMenu { flex-direction: row; gap: 4px; }
  .color-item { padding: 4px 8px; flex-shrink: 0; }
}