* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: #121213;
  color: #fff;
  font-family: 'Clear Sans', 'Helvetica Neue', Arial, sans-serif;
  min-height: 100vh;
}

.app {
  max-width: 500px;
  margin: 0 auto;
  padding: 16px;
}

header {
  text-align: center;
  border-bottom: 1px solid #3a3a3c;
  padding-bottom: 12px;
  margin-bottom: 24px;
}

header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

header .subtitle {
  color: #818384;
  font-size: 0.85rem;
  margin-top: 4px;
}

/* Guess input */
.guess-input-area {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

#guessInput {
  flex: 1;
  background: #121213;
  border: 2px solid #565758;
  border-radius: 4px;
  color: #fff;
  font-size: 1.4rem;
  letter-spacing: 0.15em;
  padding: 10px 12px;
  text-align: center;
  text-transform: uppercase;
  outline: none;
}

#guessInput:focus {
  border-color: #818384;
}

/* Tile row */
.tile-row {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin-bottom: 10px;
}

.tile {
  width: 62px;
  height: 62px;
  border: 2px solid #565758;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  text-transform: uppercase;
  cursor: pointer;
  user-select: none;
  transition: background 0.1s;
  color: #fff;
  background: #121213;
}

.tile[data-state="X"] {
  background: #3a3a3c;
  border-color: #3a3a3c;
}

.tile[data-state="I"] {
  background: #b59f3b;
  border-color: #b59f3b;
}

.tile[data-state="O"] {
  background: #538d4e;
  border-color: #538d4e;
}

.tile.empty {
  background: #121213;
  border-color: #565758;
  cursor: default;
}

/* Legend */
.tile-legend {
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 0.78rem;
  color: #818384;
  margin-bottom: 20px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: 3px;
}

.legend-tile.gray  { background: #3a3a3c; }
.legend-tile.yellow { background: #b59f3b; }
.legend-tile.green  { background: #538d4e; }

/* Controls */
.controls {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 24px;
}

button {
  background: #538d4e;
  border: none;
  border-radius: 4px;
  color: #fff;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 12px 24px;
  text-transform: uppercase;
  transition: opacity 0.1s;
}

button:hover:not(:disabled) { opacity: 0.85; }
button:disabled { background: #3a3a3c; color: #818384; cursor: default; }

#resetBtn {
  background: #3a3a3c;
}

#resetBtn:hover { opacity: 0.85; }

/* Status message */
.status {
  text-align: center;
  font-size: 0.85rem;
  color: #e63946;
  min-height: 20px;
  margin-bottom: 16px;
}

/* History */
.history {
  margin-bottom: 24px;
}

.history-label {
  color: #818384;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.history-row {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin-bottom: 6px;
}

.history-tile {
  width: 44px;
  height: 44px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #fff;
}

.history-tile.X { background: #3a3a3c; }
.history-tile.I { background: #b59f3b; }
.history-tile.O { background: #538d4e; }

/* Results */
.results {
  border-top: 1px solid #3a3a3c;
  padding-top: 20px;
}

.results.hidden { display: none; }

.remaining-count {
  text-align: center;
  font-size: 0.95rem;
  color: #818384;
  margin-bottom: 16px;
}

.remaining-count strong {
  color: #fff;
}

.suggestions-label {
  color: #818384;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.suggestions-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.suggestion-chip {
  background: #1a1a1b;
  border: 1px solid #3a3a3c;
  border-radius: 4px;
  padding: 6px 12px;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #d7dadc;
}

.solved-banner {
  text-align: center;
  background: #538d4e;
  border-radius: 6px;
  padding: 16px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}