/* Korean Connections — unified NYT cream tile styling for S1 + S2 */

:root {
  --cream: #ece9e0;
  --cream-hover: #e2dfd5;
  --pool-grey: #e4e4e2;
  --pool-grey-hover: #d8d8d4;
  --text-dark: #2a2a28;
  --text-muted: #6b6b68;
  --ease-out: ease-out;
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --tile-radius: 8px;
  --tile-gap: 8px;
  --tile-outline-width: 1px;
  --tile-outline: #8a8a86;
  --tile-outline-hover: #6b6b68;
  --tile-select-width: 2px;
  --board-max: 560px;
  --board-pad: 20px;
  --tile-font: clamp(1.2rem, 4.4vw, 1.55rem);
  --tile-english-font: clamp(0.58rem, 2.2vw, 0.72rem);
  --label-font: clamp(0.92rem, 2.9vw, 1.08rem);
  --incorrect-red: rgba(160, 40, 40, 0.78);
  --select-ring: #2a2a28;
  --selected-bg: #000;

  /* Category palette — darker tints for Section 1 */
  --cat-green-fill: #b8ccc0;
  --cat-green-hover: #a8beb2;
  --cat-green-label: #4a6b52;

  --cat-blue-fill: #b4c4d8;
  --cat-blue-hover: #a4b4cc;
  --cat-blue-label: #4a5a78;

  --cat-purple-fill: #c0b4c8;
  --cat-purple-hover: #b0a4b8;
  --cat-purple-label: #5e4a68;

  --cat-orange-fill: rgba(242, 173, 115, 0.35);
  --cat-orange-hover: rgba(242, 173, 115, 0.45);
  --cat-orange-label: #9a7050;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text-dark);
  background: #fff;
  line-height: 1.4;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.app-header {
  width: min(100%, var(--board-max) + var(--board-pad) * 2);
  max-width: calc(var(--board-max) + var(--board-pad) * 2);
  margin: 0 auto;
  padding: 20px var(--board-pad) 4px;
}

.header-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.app-title {
  margin: 0;
  font-size: clamp(1.28rem, 4.2vw, 1.68rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-align: left;
  color: var(--text-dark);
}

.puzzle-label {
  margin: 0;
  font-size: clamp(0.72rem, 2.4vw, 0.82rem);
  font-weight: 500;
  color: var(--text-muted);
  text-align: right;
  white-space: nowrap;
  flex-shrink: 0;
}

.mode-nav {
  margin: 6px 0 0;
  font-size: 0.82rem;
}

.mode-link {
  color: var(--text-muted);
  text-decoration: none;
}

.mode-link:hover {
  color: var(--text-dark);
  text-decoration: underline;
}

.mode-link.is-active {
  color: var(--text-dark);
  font-weight: 600;
  text-decoration: none;
}

.mode-divider {
  margin: 0 0.4em;
  color: #c8c8c4;
  font-weight: 400;
}

#play-top.section {
  padding-top: 8px;
  padding-bottom: 8px;
}

.section {
  width: min(100%, var(--board-max) + var(--board-pad) * 2);
  max-width: calc(var(--board-max) + var(--board-pad) * 2);
  margin: 0 auto;
  padding: 20px var(--board-pad);
}

#pool.section {
  padding-top: 8px;
}

.board-width {
  width: 100%;
  max-width: var(--board-max);
  margin: 0 auto;
}

.section-divider {
  border: none;
  height: 1px;
  margin: 4px auto;
  max-width: var(--board-max);
  width: calc(100% - var(--board-pad) * 2);
  background: #e6e6e2;
}

/* --- Shared tile base (S1 slots + S2 pool) — identical cell size --- */
.tile-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--tile-gap);
  width: 100%;
  position: relative;
}

/* Shared tile look — Section 1 slots and Section 2 pool */
.tile {
  width: 100%;
  aspect-ratio: 2 / 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 10px;
  background: var(--cream);
  color: var(--text-dark);
  font-weight: 700;
  font-size: var(--tile-font);
  text-align: center;
  border: none;
  border-radius: var(--tile-radius);
  box-shadow: inset 0 0 0 var(--tile-outline-width) var(--tile-outline);
  word-break: keep-all;
  overflow-wrap: break-word;
  line-height: 1.25;
  hyphens: none;
  transition:
    background 135ms var(--ease-out),
    box-shadow 135ms var(--ease-out),
    transform 100ms var(--ease-out),
    color 135ms var(--ease-out);
  position: relative;
  z-index: 1;
}

/* --- Section 1: Category board --- */
.category-board {
  display: flex;
  flex-direction: column;
  gap: calc(var(--tile-gap) * 2);
  width: 100%;
}

.category-row {
  display: flex;
  flex-direction: column;
  gap: var(--tile-gap);
}

.category-label {
  font-weight: 700;
  font-size: var(--label-font);
  text-align: center;
  color: var(--text-dark);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 0;
  padding: 0 4px;
}

/* Section 1 category colors */
.cat-green .category-label { color: var(--cat-green-label); }
.cat-blue .category-label { color: var(--cat-blue-label); }
.cat-purple .category-label { color: var(--cat-purple-label); }
.cat-orange .category-label { color: var(--cat-orange-label); }

#category-board .cat-green .drop-slot:not(.incorrect) {
  background: var(--cat-green-fill);
}
#category-board .cat-blue .drop-slot:not(.incorrect) {
  background: var(--cat-blue-fill);
}
#category-board .cat-purple .drop-slot:not(.incorrect) {
  background: var(--cat-purple-fill);
}
#category-board .cat-orange .drop-slot:not(.incorrect) {
  background: var(--cat-orange-fill);
}

#category-board .cat-green .drop-slot.empty:hover:not(.incorrect) {
  background: var(--cat-green-hover);
}
#category-board .cat-blue .drop-slot.empty:hover:not(.incorrect) {
  background: var(--cat-blue-hover);
}
#category-board .cat-purple .drop-slot.empty:hover:not(.incorrect) {
  background: var(--cat-purple-hover);
}
#category-board .cat-orange .drop-slot.empty:hover:not(.incorrect) {
  background: var(--cat-orange-hover);
}

#category-board .drop-slot:not(.incorrect):hover {
  box-shadow: inset 0 0 0 var(--tile-outline-width) var(--tile-outline-hover);
}

.drop-slot.empty {
  cursor: pointer;
}

.drop-slot.filled {
  cursor: pointer;
}

#category-board .drop-slot.filled.selected {
  background: var(--selected-bg);
  color: #fff;
  box-shadow: none;
}

#category-board .drop-slot.filled.selected .slot-english {
  color: rgba(255, 255, 255, 0.75);
}

#category-board .drop-slot.filled.incorrect.selected {
  background: var(--selected-bg);
  color: #fff;
}

.drop-slot.with-translation {
  flex-direction: column;
  gap: 2px;
  padding: 8px 6px;
}

.drop-slot .slot-korean {
  font-size: var(--tile-font);
  font-weight: 700;
  line-height: 1.15;
}

.drop-slot .slot-english {
  font-size: var(--tile-english-font);
  font-weight: 500;
  line-height: 1.2;
  color: var(--text-muted);
}

.drop-slot.filled.incorrect {
  background: var(--incorrect-red);
  color: var(--text-dark);
  box-shadow: inset 0 0 0 var(--tile-outline-width) var(--tile-outline);
}

.drop-slot.filled.incorrect:hover {
  background: var(--incorrect-red);
  box-shadow: inset 0 0 0 var(--tile-outline-width) var(--tile-outline);
}

/* Section 2 — light grey pool tiles */
#tile-grid .pool-tile {
  background: var(--pool-grey);
}

#tile-grid .pool-tile:hover:not(.selected) {
  background: var(--pool-grey-hover);
  box-shadow: inset 0 0 0 var(--tile-outline-width) var(--tile-outline-hover);
}

.pool-tile {
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
}

#tile-grid .pool-tile.selected {
  background: var(--selected-bg);
  color: #fff;
  box-shadow: none;
  transform: scale(1.04);
}

#tile-grid .pool-tile.selected:hover {
  background: var(--selected-bg);
  color: #fff;
  box-shadow: none;
}

.pool-tile.pressable:active:not(.selected) {
  transform: scale(0.98);
}

/* --- Section 2: Hint + pool controls --- */
.pool-hint {
  margin: 0 0 10px;
  font-size: clamp(0.78rem, 2.4vw, 0.88rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  text-align: center;
}

.pool-hint.return-active {
  cursor: pointer;
  color: var(--text-dark);
  font-weight: 500;
}

.pool-controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
  width: 100%;
  margin-top: 12px;
}

.pool-controls--three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.score-result {
  margin: 14px 0 0;
  font-size: clamp(0.95rem, 3vw, 1.1rem);
  font-weight: 600;
  color: var(--text-dark);
  text-align: center;
}

.score-result.score-perfect {
  color: var(--cat-green-label);
}

.pool-controls .btn-pill.is-disabled,
.pool-controls .btn-pill:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.pool-tile--locked {
  cursor: default;
  opacity: 0.85;
}

.pool-controls .btn-pill {
  width: 100%;
  min-width: 0;
  min-height: 30px;
  padding: 5px 4px;
  font-size: 0.8rem;
  font-weight: 500;
  text-align: center;
  line-height: 1.2;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #c8c8c4;
  color: var(--text-dark);
  background: #fafaf8;
  border-radius: 20px;
}

.pool-controls .btn-pill:hover {
  background: #f0f0ec;
  color: var(--text-dark);
  border-color: #a8a8a4;
}

.pool-controls .btn-pill:active {
  background: #e8e8e4;
}

/* --- Buttons --- */
.pressable {
  transition: transform 120ms var(--ease-out);
}

.btn-pill {
  padding: 10px 28px;
  border-radius: 24px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid var(--text-dark);
  background: #fff;
  color: var(--text-dark);
}

.btn-pill:hover {
  background: #f5f5f2;
}

.btn-pill.ready {
  background: var(--text-dark);
  color: #fff;
}

.btn-pill.ready:hover {
  background: #1a1a18;
}

/* --- Win modal --- */
/* Must not set display:flex unless .visible — otherwise [hidden] is overridden in Firefox */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 20px;
  pointer-events: none;
}

.modal-backdrop.visible {
  display: flex;
  pointer-events: auto;
}

.modal-backdrop[hidden] {
  display: none !important;
  pointer-events: none !important;
}

.results-modal {
  position: relative;
  background: #fff;
  border-radius: 12px;
  padding: 32px 28px;
  max-width: 340px;
  width: 100%;
  text-align: center;
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 250ms var(--ease-out), transform 250ms var(--ease-out);
}

.modal-close-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 28px;
  height: 28px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
  border-radius: 6px;
}

.modal-close-btn:hover {
  color: var(--text-dark);
  background: #f0f0ec;
}

.modal-backdrop.visible .results-modal {
  opacity: 1;
  transform: scale(1);
}

.modal-title {
  margin: 0 0 8px;
  font-size: 1.35rem;
  font-weight: 600;
}

.modal-sub {
  margin: 0 0 24px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

@media (max-width: 520px) {
  :root {
    --board-max: 100%;
    --tile-gap: 6px;
    --tile-font: clamp(0.82rem, 3.4vw, 1rem);
    --tile-english-font: clamp(0.5rem, 2vw, 0.62rem);
    --label-font: clamp(0.8rem, 3.1vw, 0.92rem);
  }

  .section {
    padding: 16px 12px;
  }

  .tile {
    aspect-ratio: 5 / 4;
    padding: 6px 4px;
    line-height: 1.15;
  }

  .drop-slot.with-translation {
    padding: 5px 3px;
    gap: 1px;
  }

  .drop-slot .slot-korean {
    line-height: 1.1;
  }

  .drop-slot .slot-english {
    line-height: 1.1;
  }

  #tile-grid .pool-tile.selected {
    transform: scale(1.02);
  }

  #tile-grid .pool-tile.selected:hover {
    transform: scale(1.02);
  }

  /* Practice + One Shot: fit on one screen (iPhone 11 / Pixel) */
  body.placement-mode {
    min-height: 100dvh;
    max-height: 100dvh;
    overflow: hidden;
  }

  body.placement-mode .app-header {
    padding: 8px 12px 2px;
  }

  body.placement-mode .app-title {
    font-size: 1.05rem;
  }

  body.placement-mode .puzzle-label {
    font-size: 0.68rem;
  }

  body.placement-mode .mode-nav {
    margin-top: 3px;
    font-size: 0.72rem;
  }

  body.placement-mode #play-top.section {
    padding: 4px 12px 2px;
  }

  body.placement-mode #pool.section {
    padding: 2px 12px 2px;
    padding-bottom: max(2px, env(safe-area-inset-bottom));
  }

  body.placement-mode .section-divider {
    margin: 2px auto;
  }

  body.placement-mode .category-board {
    gap: 4px;
  }

  body.placement-mode .category-row {
    gap: 2px;
  }

  body.placement-mode .category-label {
    font-size: 0.6rem;
    line-height: 1.1;
    padding: 0;
    letter-spacing: 0.01em;
  }

  body.placement-mode .pool-hint {
    margin: 0 0 4px;
    font-size: 0.66rem;
    line-height: 1.15;
  }

  body.placement-mode .pool-controls {
    margin-top: 10px;
    gap: 4px;
  }

  body.placement-mode .pool-controls .btn-pill {
    min-height: 26px;
    padding: 3px 2px;
    font-size: 0.7rem;
  }

  body.placement-mode .score-result {
    margin: 4px 0 0;
    font-size: 0.82rem;
  }

  body.placement-mode .tile {
    aspect-ratio: auto;
    height: calc((100dvh - 14.25rem) / 8);
    min-height: 44px;
    padding: 3px 2px;
  }

  body.placement-mode .drop-slot.with-translation {
    padding: 2px 1px;
    gap: 0;
  }

  body.placement-mode .drop-slot .slot-korean {
    font-size: clamp(0.72rem, 3vw, 0.88rem);
  }

  body.placement-mode .drop-slot .slot-english {
    font-size: clamp(0.46rem, 1.8vw, 0.56rem);
  }
}

@supports not (height: 100dvh) {
  @media (max-width: 520px) {
    body.placement-mode {
      min-height: 100vh;
      max-height: 100vh;
    }

    body.placement-mode .tile {
      height: calc((100vh - 14.25rem) / 8);
    }
  }
}