:root {
  --bg: #f4f1ea;
  --panel: #ffffff;
  --text: #222;
  --muted: #6b6b6b;
  --square: #d8d2bf;
  --grid: #f4f1ea;
  --tw: #d9463b;
  --dw: #f0a3a0;
  --tl: #2f6fb3;
  --dl: #a8cde8;
  --tile: #f3d9a4;
  --tile-edge: #c9a86a;
  --preview: #ffe36e;
  --cursor: #1f8f4e;
  --accent: #1f8f4e;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 24px 0;
  flex-wrap: wrap;
}
h1 { margin: 0; font-size: 22px; }
.status { font-size: 13px; color: var(--muted); }
.status.error { color: var(--tw); font-weight: 600; }

main {
  display: flex;
  gap: 24px;
  padding: 16px 24px 32px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.board-wrap { flex: 0 1 auto; max-width: 100%; }

#board {
  --cell: min(36px, calc((100vw - 48px - 16px) / 16));
  display: grid;
  grid-template-columns: calc(var(--cell) * 0.6) repeat(15, var(--cell));
  grid-template-rows: calc(var(--cell) * 0.6) repeat(15, var(--cell));
  gap: 2px;
  padding: 6px;
  background: var(--grid);
  border-radius: 6px;
  outline: none;
  user-select: none;
}
#board:focus-visible { box-shadow: 0 0 0 2px var(--accent); }

.label {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--muted);
}

.cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--square);
  border-radius: 3px;
  font-size: calc(var(--cell) * 0.24);
  font-weight: 700;
  color: rgba(255, 255, 255, 0.95);
  cursor: pointer;
}
.cell.TW { background: var(--tw); }
.cell.DW, .cell.STAR { background: var(--dw); color: #7a2a26; }
.cell.TL { background: var(--tl); }
.cell.DL { background: var(--dl); color: #1f4d78; }
.cell.STAR { font-size: calc(var(--cell) * 0.5); }

.cell.tile, .cell.preview {
  background: var(--tile);
  color: #2b2b2b;
  font-size: calc(var(--cell) * 0.55);
  box-shadow: inset 0 -2px 0 var(--tile-edge);
}
.cell.preview { background: var(--preview); }
.cell.blank .letter { color: #b0372e; }
.cell .pts {
  position: absolute;
  right: 2px;
  bottom: 0;
  font-size: calc(var(--cell) * 0.22);
  font-weight: 600;
}

.cell.cursor { outline: 3px solid var(--cursor); outline-offset: -1px; z-index: 1; }
.cell.cursor::after {
  position: absolute;
  top: -2px;
  right: 1px;
  font-size: calc(var(--cell) * 0.3);
  color: var(--cursor);
  font-weight: 900;
}
.cell.cursor.across::after { content: "→"; }
.cell.cursor.down::after { content: "↓"; }
.cell.invalid { box-shadow: inset 0 0 0 2px var(--tw); }

.hint { font-size: 13px; color: var(--muted); max-width: 640px; line-height: 1.5; }
kbd {
  font-family: inherit;
  font-size: 12px;
  border: 1px solid #bbb;
  border-bottom-width: 2px;
  border-radius: 3px;
  padding: 0 4px;
  background: #fff;
}

.panel {
  flex: 1 1 280px;
  max-width: 460px;
  background: var(--panel);
  border-radius: 8px;
  padding: 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}
.panel label { font-weight: 600; display: block; margin-bottom: 6px; }
.muted { color: var(--muted); font-weight: 400; font-size: 13px; }

#rack {
  width: 100%;
  font-size: 22px;
  letter-spacing: 6px;
  text-transform: uppercase;
  padding: 8px 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
}
.rack-tiles { display: flex; gap: 4px; margin: 8px 0 12px; min-height: 36px; }
.rack-tile {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: var(--tile);
  box-shadow: inset 0 -2px 0 var(--tile-edge);
  border-radius: 3px;
  font-weight: 700;
  font-size: 18px;
}
.rack-tile .pts { position: absolute; right: 2px; bottom: 0; font-size: 9px; }

.buttons { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
button {
  font: inherit;
  padding: 8px 14px;
  border-radius: 6px;
  border: 1px solid #ccc;
  background: #fff;
  cursor: pointer;
}
button:hover { background: #f2f2f2; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
button.primary:hover { filter: brightness(1.08); }
button:disabled { opacity: 0.5; cursor: default; }

#warnings .warn {
  background: #fdecea;
  color: #8a2a22;
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 13px;
  margin-bottom: 10px;
}

#results {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
  max-height: 60vh;
  overflow-y: auto;
}
#results li {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2px 8px;
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid transparent;
}
#results li:hover { background: #fbf6e3; }
#results li.selected { background: #fff3c4; border-color: #e6cf73; }
#results .word { font-weight: 700; letter-spacing: 1px; }
#results .word .blank { color: #b0372e; }
#results .score { font-weight: 700; font-size: 18px; text-align: right; }
#results .meta { grid-column: 1 / -1; font-size: 12px; color: var(--muted); }
#results .play { grid-column: 1; justify-self: start; margin-top: 4px; padding: 4px 12px; }
#results .not-valid {
  grid-column: 2;
  align-self: center;
  margin-top: 4px;
  padding: 4px 8px;
  font-size: 12px;
  border: none;
  background: none;
  color: var(--muted);
  text-decoration: underline;
}
#results .not-valid:hover { color: var(--tw); background: none; }
#word-changes-list { list-style: none; padding: 0; margin: 8px 0 0; display: flex; flex-wrap: wrap; gap: 6px; }
#word-changes-list li { background: #f4f1ea; border-radius: 6px; padding: 2px 4px 2px 8px; font-weight: 600; font-size: 13px; }
#word-changes-list li.added { color: var(--accent); }
#word-changes-list li.blocked { color: var(--tw); }
#word-changes-list button { padding: 2px 6px; font-size: 12px; margin-left: 4px; color: var(--text); }
.unknown-word { display: inline-block; font-weight: 700; margin: 2px 8px 2px 0; }
.unknown-word button { padding: 2px 8px; font-size: 12px; margin-left: 2px; }
.bingo { color: var(--accent); font-weight: 700; }

.dict-load { margin-top: 16px; font-size: 13px; }
.dict-load summary { cursor: pointer; color: var(--muted); }

#tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 6px;
}
.tab {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 6px 6px 12px;
  border-radius: 6px;
  background: #e6e1d4;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
  user-select: none;
}
.tab:hover { background: #ddd6c5; }
.tab.active { background: var(--panel); color: var(--text); font-weight: 600; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1); }
.tab-close {
  border: none;
  background: none;
  padding: 0 6px;
  font-size: 16px;
  line-height: 1;
  color: inherit;
  border-radius: 4px;
}
.tab-close:hover { background: rgba(0, 0, 0, 0.08); }
.tab-add {
  padding: 6px 12px;
  font-size: 14px;
  background: transparent;
  border: 1px dashed #bbb;
  color: var(--muted);
}