:root {
  color-scheme: light;
  --ink: #202124;
  --muted: #67727e;
  --line: #d8dde3;
  --surface: #ffffff;
  --page: #f5f7f8;
  --accent: #0f766e;
  --accent-dark: #115e59;
  --gold: #c58724;
  --cell: minmax(0, 1fr);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--page);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-text-size-adjust: 100%;
}

button,
input {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 24px;
  min-height: 100vh;
  padding: 24px;
}

.workspace,
.sidebar {
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent-dark);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 0.95;
}

h2 {
  margin-bottom: 12px;
  font-size: 1rem;
}

.actions,
.controls {
  display: flex;
  align-items: end;
  gap: 10px;
  flex-wrap: wrap;
}

.controls {
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

input {
  width: 100%;
  min-width: 120px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 12px;
  color: var(--ink);
  background: #fff;
}

#themeInput {
  min-width: 220px;
}

button {
  min-width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease, border 120ms ease;
}

button:hover {
  transform: translateY(-1px);
}

button:disabled {
  cursor: progress;
  opacity: 0.62;
  transform: none;
}

.primary-button {
  padding: 0 18px;
  border-color: var(--accent);
  background: var(--accent);
  color: white;
  font-weight: 800;
}

.text-button {
  padding: 0 14px;
}

.icon-button {
  width: 42px;
  font-size: 1.2rem;
}

.status-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  min-height: 34px;
  padding: 10px 2px 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.board-panel {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 0;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.crossword-grid {
  display: grid;
  width: min(72vh, 100%);
  max-width: 760px;
  aspect-ratio: 1;
  border: 2px solid var(--ink);
  background: var(--ink);
  gap: 1px;
}

.cell {
  position: relative;
  display: block;
  min-width: 0;
  min-height: 0;
  background: #fff;
  color: var(--ink);
  font-weight: 800;
  text-transform: uppercase;
  user-select: none;
}

.cell.block {
  background: var(--ink);
}

.cell.correct {
  background: #edf8f2;
}

.cell.wrong {
  background: #fff0f0;
  box-shadow: inset 0 0 0 3px #cf3d3d;
}

.number {
  position: absolute;
  top: 2px;
  left: 3px;
  font-size: clamp(0.42rem, 1.1vw, 0.72rem);
  line-height: 1;
  color: var(--gold);
  font-weight: 900;
}

.letter {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  place-items: center;
  font-size: clamp(0.78rem, 2.3vw, 1.9rem);
  line-height: 1;
  opacity: 0;
  pointer-events: none;
}

.show-answers .letter {
  opacity: 1;
}

.cell-input {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  border: 0;
  border-radius: 0;
  padding: 0;
  background: transparent;
  color: var(--ink);
  font-size: clamp(0.78rem, 2.3vw, 1.9rem);
  font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  font-weight: 800;
  line-height: 1;
  text-align: center;
  text-transform: uppercase;
  caret-color: var(--accent);
  overflow: hidden;
  white-space: nowrap;
}

.cell-input:focus {
  outline: 3px solid var(--accent);
  outline-offset: -3px;
  background: #e9fbf7;
}

.show-answers .cell-input {
  color: transparent;
  caret-color: transparent;
}

.celebration {
  position: absolute;
  left: 50%;
  bottom: 28px;
  z-index: 4;
  display: grid;
  gap: 4px;
  min-width: min(360px, calc(100% - 36px));
  padding: 14px 18px;
  border: 1px solid #9bc9b3;
  border-radius: 8px;
  background: #f1fff7;
  color: #14532d;
  text-align: center;
  box-shadow: 0 16px 38px rgba(32, 33, 36, 0.18);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 12px) scale(0.98);
  transition: opacity 160ms ease, transform 160ms ease;
}

.celebration.visible {
  opacity: 1;
  transform: translate(-50%, 0) scale(1);
}

.celebration strong {
  font-size: 1.1rem;
}

.celebration span {
  color: #2f6846;
  font-size: 0.9rem;
}

.sidebar {
  display: grid;
  align-content: start;
  gap: 16px;
}

.sidebar section {
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.clue-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 1.35rem;
}

.clue-list li {
  padding-left: 4px;
  color: var(--muted);
  line-height: 1.35;
}

.clue-list strong {
  color: var(--ink);
}

.word-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.word-chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 4px 9px;
  border: 1px solid #b7d7d3;
  border-radius: 999px;
  background: #eef9f7;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 800;
  text-decoration: none;
  text-transform: uppercase;
  filter: blur(5px);
  opacity: 0.55;
}

.word-chip:focus {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.word-bank.show-answers .word-chip {
  filter: none;
  opacity: 1;
}

@media (max-width: 920px) {
  .app-shell {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  .topbar {
    align-items: flex-start;
  }

  .crossword-grid {
    width: min(92vw, 680px);
  }
}

@media (max-width: 640px) {
  body {
    background: var(--surface);
  }

  .app-shell {
    gap: 14px;
    min-height: 100svh;
    padding: calc(10px + env(safe-area-inset-top)) 10px calc(14px + env(safe-area-inset-bottom));
  }

  .topbar {
    display: grid;
    gap: 12px;
    margin-bottom: 12px;
  }

  h1 {
    font-size: 2rem;
    line-height: 1.05;
  }

  .actions {
    display: grid;
    grid-template-columns: 42px 1fr 1fr;
    gap: 8px;
    width: 100%;
  }

  .actions button {
    width: 100%;
    padding-inline: 8px;
    white-space: nowrap;
  }

  .controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding: 12px;
  }

  .controls .primary-button {
    grid-column: 1 / -1;
  }

  input {
    min-width: 0;
    height: 44px;
  }

  .status-row {
    display: grid;
    gap: 4px;
    min-height: 0;
    padding-top: 8px;
    font-size: 0.82rem;
  }

  .board-panel {
    width: calc(100vw - 20px);
    padding: 8px;
    border-left: 0;
    border-right: 0;
    border-radius: 0;
  }

  .crossword-grid {
    width: min(calc(100vw - 36px), 74svh);
    max-width: none;
  }

  .number {
    top: 1px;
    left: 2px;
    font-size: 0.52rem;
  }

  .letter,
  .cell-input {
    font-size: clamp(1rem, 5.4vw, 1.75rem);
  }

  .sidebar {
    gap: 10px;
  }

  .sidebar section {
    padding: 12px;
    border-left: 0;
    border-right: 0;
    border-radius: 0;
  }

  .clue-list {
    gap: 8px;
    padding-left: 1.2rem;
    font-size: 0.9rem;
  }

  .word-chip {
    min-height: 28px;
    font-size: 0.72rem;
  }

  .celebration {
    bottom: 16px;
    min-width: calc(100% - 24px);
  }
}

@media (max-width: 380px) {
  .actions {
    grid-template-columns: 42px 1fr;
  }

  #revealButton {
    grid-column: 1 / -1;
  }
}

@media print {
  body {
    background: #fff;
  }

  .controls,
  .actions,
  .status-row,
  .word-bank {
    display: none;
  }

  .app-shell {
    display: block;
    padding: 0;
  }

  .workspace,
  .sidebar section {
    break-inside: avoid;
  }

  .cell .letter {
    opacity: 0;
  }
}