/* Container styling */
.container {
  max-width: 650px;
  margin: 1rem auto;
  padding: 1rem 1.5rem;
  background: #fff;
  color: #333;
  font-family: Arial, sans-serif;
  border: 1px solid #ccc;
  border-radius: 8px;
  text-align: center;
  box-sizing: border-box;
}

/* Logo container */
.logo-container img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 1rem auto;
}

/* Hint */
.hint {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  min-height: 1.4em;
}

/* Word display */
.word {
  font-size: 2rem;
  letter-spacing: 0.3rem;
  margin-bottom: 1rem;
  font-weight: bold;
}

/* Letters container */
.letters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 1rem;
}

/* Letter buttons */
.letters button {
  width: 36px;
  height: 36px;
  font-size: 1.1rem;
  font-weight: bold;
  cursor: pointer;
  border: 2px solid #555;
  border-radius: 4px;
  background: #f0f0f0;
  color: #555;
  transition: background-color 0.3s, color 0.3s;
  user-select: none;
}

.letters button:hover:not(:disabled) {
  background-color: #ddd;
  color: #222;
}

.letters button:disabled {
  background-color: #bbb;
  color: #888;
  cursor: default;
}

/* Message */
.message {
  font-size: 1.2rem;
  min-height: 1.4em;
  margin-bottom: 1rem;
}

/* Buttons */
#resetBtn, #hintBtn, #solveBtn, #homeBtn, #playBtn {
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s;
  margin: 0.2rem 0.3rem 0.2rem 0;
  color: white;
}

/* Play button */
#playBtn {
  background-color: #555;
  display: block;
  margin: 0 auto 1.5rem auto;
}

#playBtn:hover {
  background-color: #333;
}

/* Reset button */
#resetBtn {
  background-color: #555;
}

#resetBtn:hover {
  background-color: #333;
}

/* Home button */
#homeBtn {
  background-color: #777;
  margin-left: 0.3rem;
}

#homeBtn:hover {
  background-color: #555;
}

/* Hint and Solve buttons */
#hintBtn, #solveBtn {
  background-color: #2883e9;
  margin-left: 0;
}

#hintBtn:hover:not(:disabled),
#solveBtn:hover:not(:disabled) {
  background-color: #0f61c4;
}

#hintBtn:disabled {
  background-color: #bbb;
  color: #888;
  cursor: default;
}

/* Difficulty selector */
.difficulty-selector {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 1rem;
  user-select: none;
}

.difficulty-row {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.difficulty-circle {
  width: 80px;
  height: 80px;
  border: 3px solid #555;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s, border-color 0.3s;
  color: #555;
}

.difficulty-circle:hover {
  background-color: #ddd;
  border-color: #333;
  color: #222;
}

.difficulty-circle.selected {
  background-color: #333;
  border-color: #111;
  color: white;
}

/* Decade selector */
.decade-selector {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 1rem;
  user-select: none;
}

.decade-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.decade-circle {
  width: 60px;
  height: 60px;
  border: 3px solid #666;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s, border-color 0.3s;
  color: #666;
  font-size: 0.85rem;
}

.decade-circle:hover {
  background-color: #eee;
  border-color: #444;
  color: #222;
}

.decade-circle.selected {
  background-color: #444;
  border-color: #222;
  color: white;
}

/* Footer */
.footer {
  margin-top: 2rem;
  font-size: 0.9rem;
  color: #555;
}

/* Responsive adjustments */
@media (max-width: 700px) {
  .difficulty-circle {
    width: 60px;
    height: 60px;
    font-size: 0.8rem;
  }
  .decade-circle {
    width: 50px;
    height: 50px;
    font-size: 0.7rem;
  }
  #resetBtn, #hintBtn, #solveBtn, #homeBtn, #playBtn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
  }
  .word {
    font-size: 1.5rem;
    letter-spacing: 0.2rem;
  }
  .letters button {
    width: 30px;
    height: 30px;
    font-size: 1rem;
  }
}

@media (max-width: 400px) {
  .container {
    padding: 0.5rem 1rem;
  }
  .difficulty-circle, .decade-circle {
    width: 45px;
    height: 45px;
    font-size: 0.65rem;
  }
  .letters button {
    width: 26px;
    height: 26px;
    font-size: 0.9rem;
  }
}