:root {
  --bg: #f5f3ee;
  --paper: #fffdf8;
  --ink: #1b1b1b;
  --muted: #6b6a63;
  --accent: #7a2a1f;
  --accent-2: #b5401f;
  --line: #3a3a3a;
  --soft-line: #cfcac0;
  --good: #2a8a3e;
  --bad: #b42828;
  --shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
}

button, input, select, textarea {
  font: inherit;
}

/* === Generator page === */
.generator-page {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.app-header h1 {
  font-size: 2.2rem;
  margin-bottom: 0.3rem;
  color: var(--accent);
}
.app-header p {
  color: var(--muted);
  margin-top: 0;
}

.phase {
  background: var(--paper);
  border: 1px solid var(--soft-line);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow);
}
.phase.hidden { display: none; }

#theme-form {
  display: grid;
  gap: 1rem;
  max-width: 520px;
}
#theme-form label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-weight: bold;
}
#theme-form input,
#theme-form select {
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--soft-line);
  border-radius: 4px;
  background: white;
}
button {
  padding: 0.65rem 1.2rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s;
}
button:hover:not(:disabled) { background: var(--accent-2); }
button:disabled { opacity: 0.6; cursor: wait; }
button.primary { background: var(--good); }
button.primary:hover:not(:disabled) { background: #226b31; }

.concept-card h3 {
  margin: 0 0 0.3rem;
  color: var(--accent);
  font-size: 1.6rem;
}
.concept-card .narrative {
  font-style: italic;
  color: #333;
  margin-bottom: 1rem;
}
.categories-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}
.category {
  border: 1px solid var(--soft-line);
  border-radius: 6px;
  padding: 0.8rem;
  background: #faf7f0;
}
.category h4 {
  margin: 0 0 0.4rem;
  color: var(--accent-2);
}
.category ul {
  margin: 0;
  padding-left: 1.2rem;
}

.concept-actions {
  margin-top: 1rem;
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.error-box {
  margin-top: 1rem;
  padding: 0.7rem 1rem;
  background: #fbe9e7;
  color: var(--bad);
  border-left: 4px solid var(--bad);
  border-radius: 4px;
}
.error-box.hidden { display: none; }

.spinner {
  width: 44px;
  height: 44px;
  border: 5px solid var(--soft-line);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  margin: 1rem 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

#result-links a.primary-link {
  display: inline-block;
  margin-right: 0.6rem;
  margin-top: 0.5rem;
  padding: 0.6rem 1rem;
  background: var(--accent);
  color: white;
  text-decoration: none;
  border-radius: 4px;
}
#result-links a.primary-link:hover { background: var(--accent-2); }

.app-footer {
  margin-top: 2.5rem;
  text-align: center;
  color: var(--muted);
}
#history-list { margin-top: 1rem; text-align: left; }
#history-list.hidden { display: none; }
#history-list ul { list-style: none; padding: 0; }
#history-list li {
  padding: 0.3rem 0;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
#history-list li a { flex: 0 1 auto; }
.hist-diff { color: var(--accent-2); font-size: 0.85rem; font-weight: bold; }
.hist-date { color: var(--muted); font-size: 0.85rem; flex: 1; }
.hist-delete {
  background: transparent;
  color: var(--bad);
  border: 1px solid transparent;
  padding: 0.1rem 0.5rem;
  font-size: 0.9rem;
  cursor: pointer;
  border-radius: 4px;
}
.hist-delete:hover:not(:disabled) {
  background: #fbe9e7;
  border-color: var(--bad);
}

/* === Puzzle page === */
.puzzle-page {
  background: var(--bg);
  padding: 0 1rem 4rem;
}

.puzzle-toolbar {
  max-width: 1400px;
  margin: 0 auto 1rem;
  padding: 0.8rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--soft-line);
}
.puzzle-toolbar .tb-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: bold;
}
.puzzle-toolbar .tb-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.puzzle-toolbar .tb-btn {
  padding: 0.55rem 1rem;
  background: var(--accent);
  color: white;
  text-decoration: none;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.92rem;
}
.puzzle-toolbar .tb-btn:hover { background: var(--accent-2); }
.puzzle-toolbar .tb-btn.is-generating {
  pointer-events: none;
  opacity: 0.75;
  cursor: progress;
}

.puzzle-statement,
.puzzle-main,
.answer-section {
  max-width: 1400px;
  margin: 0 auto 1.5rem;
}

.puzzle-main {
  --board-zoom: 1;
  --text-zoom: 1;
  display: flex;
  gap: 1.5rem;
  align-items: stretch;
  flex-wrap: wrap;
}
.puzzle-main .puzzle-board {
  flex: 0 1 auto;
  max-width: 100%;
  margin: 0;
}
.puzzle-main .clues-box {
  flex: 1 1 320px;
  max-width: 520px;
  display: flex;
  flex-direction: column;
}
.puzzle-main .clues-box h2 {
  font-size: calc(1.35rem * var(--board-zoom) * var(--text-zoom));
}
.puzzle-main .clues-list {
  flex: 1 1 auto;
}
.puzzle-main .clues-list li {
  font-size: calc(0.98rem * var(--board-zoom) * var(--text-zoom));
  line-height: 1.45;
  padding: calc(0.5rem * var(--board-zoom)) 0;
}
@media (max-width: 900px) {
  .puzzle-main { flex-direction: column; }
  .puzzle-main .clues-box { max-width: none; width: 100%; }
}

.puzzle-header {
  padding: 1.2rem 1.6rem;
  background: var(--paper);
  border: 1px solid var(--soft-line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}
.puzzle-header h1 {
  margin: 0 0 0.3rem;
  color: var(--accent);
  font-size: 2rem;
}
.puzzle-header .narrative {
  margin: 0.3rem 0;
  font-style: italic;
  font-size: 1.05rem;
}
.puzzle-header .meta {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.clues-box {
  background: var(--paper);
  border: 1px solid var(--soft-line);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  box-shadow: var(--shadow);
}
.clues-box h2 {
  margin-top: 0;
  color: var(--accent);
}
.clues-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.clues-list li {
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--soft-line);
  font-size: 0.98rem;
  line-height: 1.4;
}
.clues-list li:last-child { border-bottom: none; }
.clue-num {
  font-weight: bold;
  color: var(--accent-2);
  margin-right: 0.3rem;
}

.grid-box {
  background: var(--paper);
  border: 1px solid var(--soft-line);
  border-radius: 8px;
  padding: 0.8rem;
  box-shadow: var(--shadow);
  overflow-x: auto;
  text-align: center;
}

.grid-controls {
  display: flex;
  gap: 1.4rem;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 0.8rem;
  padding: 0.5rem 0.8rem;
  background: #faf7f0;
  border: 1px solid var(--soft-line);
  border-radius: 6px;
}
.grid-controls label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--muted);
  white-space: nowrap;
}
.grid-controls input[type="range"] {
  width: 160px;
  accent-color: var(--accent);
  cursor: pointer;
}
.grid-controls .zoom-val {
  font-weight: bold;
  color: var(--accent);
  min-width: 3.2em;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.grid-controls .zoom-reset {
  padding: 0.3rem 0.7rem;
  font-size: 0.85rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.puzzle-grid {
  border-collapse: collapse;
  margin: 0 auto;
  font-size: calc(1rem * var(--board-zoom, 1) * var(--text-zoom, 1));
}
.puzzle-grid th,
.puzzle-grid td {
  border: 1px solid var(--line);
  padding: 0;
}
.puzzle-grid .cat-header {
  background: #e8dcc5;
  font-weight: bold;
  padding: 6px 8px;
  text-align: center;
  border-bottom: 2px solid var(--line);
  font-size: calc(1rem * var(--board-zoom) * var(--text-zoom));
}
.puzzle-grid .elem-header {
  height: calc(140px * var(--board-zoom));
  width: calc(36px * var(--board-zoom));
  min-width: calc(36px * var(--board-zoom));
  max-width: calc(36px * var(--board-zoom));
  background: #f0e8d7;
  vertical-align: bottom;
  padding: 0;
  text-align: center;
}
.puzzle-grid .elem-header.vertical > div {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  display: inline-block;
  padding: 6px 2px;
  font-size: calc(0.95rem * var(--board-zoom) * var(--text-zoom));
  white-space: nowrap;
  font-weight: normal;
}
.puzzle-grid .row-cat-header {
  background: #e8dcc5;
  font-weight: bold;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  padding: 8px 6px;
  text-align: center;
  border-right: 2px solid var(--line);
  font-size: calc(1rem * var(--board-zoom) * var(--text-zoom));
}
.puzzle-grid .row-elem-header {
  background: #f0e8d7;
  padding: 6px 10px;
  text-align: right;
  font-weight: normal;
  font-size: calc(1rem * var(--board-zoom) * var(--text-zoom));
  white-space: nowrap;
  min-width: calc(110px * var(--board-zoom));
}
.puzzle-grid .grid-cell {
  width: calc(36px * var(--board-zoom));
  min-width: calc(36px * var(--board-zoom));
  height: calc(36px * var(--board-zoom));
  background: white;
  text-align: center;
  cursor: pointer;
  user-select: none;
  font-size: calc(1.35rem * var(--board-zoom) * var(--text-zoom));
  font-weight: bold;
  line-height: 1;
}
.puzzle-grid .grid-cell:hover { background: #fff3d6; }
.puzzle-grid .grid-cell[data-state="check"] { color: var(--good); }
.puzzle-grid .grid-cell[data-state="x"] { color: var(--bad); }
.puzzle-grid .thick-right { border-right: 2px solid var(--line); }
.puzzle-grid tr.section-start > td,
.puzzle-grid tr.section-start > th { border-top: 2px solid var(--line); }
.puzzle-grid .corner {
  background: #e8dcc5;
  border: 1px solid var(--line);
}

.answer-section {
  background: var(--paper);
  border: 1px solid var(--soft-line);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  box-shadow: var(--shadow);
}
.answer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.answer-header h2 {
  margin: 0;
  color: var(--accent);
}

.answer-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.8rem;
  table-layout: fixed;
}
.answer-table th,
.answer-table td {
  border: 1px solid var(--line);
  padding: 0.45rem 0.6rem;
  text-align: left;
  width: 25%;
}
.answer-table th {
  background: #e8dcc5;
}
.answer-table .solution-cell {
  color: var(--muted);
}
.answer-table:not(.hidden-solution) .solution-cell {
  color: var(--ink);
  font-weight: bold;
}

@media print {
  @page { size: A4 landscape; margin: 8mm; }

  /* Fuerza tamaños base: ignora el zoom interactivo al imprimir */
  .puzzle-main {
    --board-zoom: 1 !important;
    --text-zoom: 1 !important;
  }

  html, body { background: white !important; }
  body.puzzle-page {
    background: white !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .puzzle-toolbar { display: none !important; }
  #toggle-solution, #print-btn { display: none !important; }
  .grid-controls { display: none !important; }

  .puzzle-statement,
  .puzzle-main,
  .puzzle-board,
  .puzzle-header,
  .clues-box,
  .grid-box,
  .answer-section {
    background: white !important;
    background-color: white !important;
    box-shadow: none !important;
    border: none !important;
    max-width: none !important;
    margin: 0 !important;
    padding: 0 !important;
  }
  /* En horizontal aprovechamos el ancho: tablero + pistas lado a lado */
  .puzzle-main {
    display: flex !important;
    flex-direction: row !important;
    gap: 8mm !important;
    align-items: flex-start !important;
  }
  .puzzle-main .puzzle-board { flex: 0 0 auto !important; }
  .puzzle-main .clues-box {
    flex: 1 1 auto !important;
    position: static !important;
    max-width: none !important;
    min-height: 0 !important;
  }
  .clues-box { padding: 0 !important; }
  .grid-box { padding: 0 !important; }
  .answer-section { padding: 0 !important; }
  .puzzle-header { padding: 0 0 0.5rem !important; margin-bottom: 0.5rem !important; }

  /* Esquina vacía del tablero: sin fondo marrón en PDF/impresión */
  .puzzle-grid .corner {
    background: white !important;
    background-color: white !important;
    border-color: transparent !important;
  }

  /* Nunca cortar el tablero */
  .puzzle-board,
  .grid-box,
  .puzzle-grid {
    page-break-inside: avoid !important;
    break-inside: avoid !important;
  }
  /* Evita separar cabecera del resto por un salto no deseado */
  .puzzle-statement,
  .puzzle-main {
    page-break-before: auto !important;
    break-before: auto !important;
  }

  /* Solución siempre en página propia */
  .answer-section:not(.hidden-solution) {
    page-break-before: always !important;
    break-before: page !important;
    page-break-inside: avoid !important;
    break-inside: avoid !important;
  }

  /* Si la solución está oculta, no imprimirla */
  .answer-section.hidden-solution { display: none !important; }
}