body {
  font-family: 'Poppins', 'Arial', sans-serif;
  background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
  margin: 0;
  padding: 20px;
  min-height: 100vh;
  color: #2c3e50;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.95);
  padding: 2rem;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.2);
  animation: fadeIn 0.5s ease-out;
  backdrop-filter: blur(10px);
}

.game-controls {
  margin-bottom: 2rem;
  text-align: center;
  display: flex;
  gap: 1rem;
  justify-content: center;
  align-items: center;
}

.control-btn {
  padding: 0.8rem 1.5rem;
  font-size: 1.1rem;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: bold;
}

#start-btn {
  background: linear-gradient(145deg, #4CAF50, #45a049);
  color: white;
  box-shadow: 0 4px 15px rgba(76,175,80,0.3);
  transform: translateY(0);
  transition: all 0.3s ease;
}

#start-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(76,175,80,0.4);
}

#end-btn {
  background: linear-gradient(145deg, #f44336, #d32f2f);
  color: white;
  box-shadow: 0 4px 15px rgba(244,67,54,0.3);
  transform: translateY(0);
  transition: all 0.3s ease;
}

#end-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(244,67,54,0.4);
}

#difficulty-select {
  padding: 0.8rem 1.5rem;
  font-size: 1.1rem;
  border: 2px solid #ddd;
  border-radius: 5px;
  background: white;
  cursor: pointer;
  transition: all 0.3s ease;
}

#difficulty-select:hover {
  border-color: #4CAF50;
}

.game-container {
    text-align: center;
    margin: 20px auto;
    padding: 20px;
    background-color: #f5f5f5;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    max-width: 600px;
}

#puzzle-display {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin: 20px 0;
    min-height: 100px;
    padding: 10px;
}

.letter-tile {
    width: 50px;
    height: 50px;
    background: linear-gradient(145deg, #ffffff, #f0f0f0);
    border: none;
    border-radius: 15px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: bold;
    color: #2c3e50;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 0 4px;
    box-shadow: 5px 5px 15px rgba(0,0,0,0.1),
                -5px -5px 15px rgba(255,255,255,0.8);
}

.letter-tile:hover {
    transform: translateY(-5px);
    background: linear-gradient(145deg, #3498db, #2980b9);
    color: #fff;
    box-shadow: 0 10px 20px rgba(52,152,219,0.3);
}

.game-message {
    font-size: 20px;
    color: #666;
    margin: 20px 0;
}

.restart-btn, .clear-btn {
    padding: 10px 20px;
    font-size: 1.2em;
    background: linear-gradient(145deg, #4CAF50, #45a049);
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin: 5px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 20px;
    transition: background-color 0.3s;
}

.restart-btn:hover {
    background-color: #45a049;
}

.game-controls {
    margin: 20px 0;
}

#puzzle-display {
    font-size: 2.5rem;
    font-weight: bold;
    letter-spacing: 0.5rem;
    padding: 1rem 2rem;
    background-color: #f0f0f0;
    border-radius: 8px;
    margin-bottom: 1rem;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-transform: uppercase;
    transition: all 0.3s ease;
}

#puzzle-display.correct {
    background-color: #4CAF50;
    color: white;
    transform: scale(1.1);
}

#puzzle-display.error {
    background-color: #f44336;
    color: white;
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

#puzzle-display {
    font-size: 2rem;
    font-weight: bold;
    letter-spacing: 0.2rem;
    margin: 1rem 0;
    padding: 1.5rem;
    border-radius: 8px;
    background-color: #f0f0f0;
    transition: all 0.3s ease;
    text-align: center;
    width: 90%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

#puzzle-display.correct {
  background: #4CAF50;
  color: white;
  transform: scale(1.02);
}

#puzzle-display.error {
  background: #ff5252;
  color: white;
  animation: shake 0.5s;
}

.points-animation {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2rem;
  color: #4CAF50;
  animation: floatUp 1s ease-out;
  pointer-events: none;
}

input[type="text"] {
  padding: 0.8rem;
  font-size: 1.2rem;
  border: 2px solid #ddd;
  border-radius: 5px;
  width: 100%;
  box-sizing: border-box;
}

button {
  padding: 0.8rem 1.5rem;
  font-size: 1.1rem;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.3s ease;
}

#submit-btn {
  background: #4CAF50;
  color: white;
}

#hint-btn {
  background: #2196F3;
  color: white;
}

.button-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.score-board {
    display: flex;
    justify-content: space-around;
    margin: 25px 0;
    padding: 1.2rem;
    background: linear-gradient(145deg, #ffffff, #f8f9fa);
    border-radius: 16px;
    box-shadow: 8px 8px 16px rgba(0,0,0,0.1),
                -8px -8px 16px rgba(255,255,255,0.8);
    position: relative;
    overflow: hidden;
}

.found-words {
    width: 90%;
    margin-top: 1rem;
    padding: 1rem;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.found-words h3 {
    margin: 0 0 0.5rem 0;
    color: #333;
    font-size: 1.1rem;
}

.word-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.found-word {
    background: linear-gradient(145deg, #e8f5e9, #c8e6c9);
    color: #2e7d32;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.95rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(46,125,50,0.15);
    transition: all 0.3s ease;
}

.found-word:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(46,125,50,0.25);
}

.score-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.score-item .label {
  color: #666;
}

.score-item #score,
.score-item #streak,
.score-item #timer {
  font-weight: bold;
  font-size: 1.5rem;
  color: #2196F3;
  min-width: 4ch;
  padding: 0.5rem;
  border-radius: 8px;
  background: rgba(33, 150, 243, 0.1);
  transition: all 0.3s ease;
}

.score-item #timer.warning {
  color: #ff9800;
  background: rgba(255, 152, 0, 0.1);
  animation: pulse 1s infinite;
}

.score-item #timer.danger {
  color: #f44336;
  background: rgba(244, 67, 54, 0.1);
  animation: pulse 0.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

@keyframes floatUp {
  0% { opacity: 1; transform: translate(-50%, -50%); }
  100% { opacity: 0; transform: translate(-50%, -150%); }
}

/* Responsive design */
@media (max-width: 600px) {
  .container {
    padding: 1rem;
  }
  #puzzle-display {
    font-size: 1.5rem;
  }
  .score-board {
    flex-direction: column;
    gap: 1rem;
    align-items: center;
  }
}