/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Poppins', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea, #764ba2);
  margin: 0;
  padding: 20px;
  color: #333;
  transition: background 0.5s ease;
}

.converter {
  background: rgba(255, 255, 255, 0.95);
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  width: 100%;
  max-width: 450px;
  box-sizing: border-box;
  transition: all 0.3s ease;
}

.converter h1 {
  text-align: center;
  margin-bottom: 25px;
  color: #4a4a4a;
  font-weight: 600;
  font-size: 2rem;
  position: relative;
  padding-bottom: 10px;
}

.converter h1::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #667eea, #764ba2);
  border-radius: 3px;
}

.input-group {
  margin-bottom: 20px;
}

.input-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: #555;
}

.converter input,
.converter select {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 1rem;
  margin-bottom: 15px;
  transition: all 0.3s;
  font-family: 'Poppins', sans-serif;
}

.converter input:focus,
.converter select:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.converter button {
  width: 100%;
  padding: 14px;
  background: linear-gradient(90deg, #667eea, #764ba2);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
  margin-top: 10px;
  font-family: 'Poppins', sans-serif;
}

.converter button:hover {
  background: linear-gradient(90deg, #5a6fd6, #6a429a);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.converter button:active {
  transform: translateY(0);
}

.result {
  margin-top: 25px;
  padding: 15px;
  background: rgba(102, 126, 234, 0.1);
  border-radius: 8px;
  font-size: 1.1rem;
  word-wrap: break-word;
  text-align: center;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}

/* Success and error states */
.result.success {
  background: rgba(72, 187, 120, 0.1);
  color: #2f855a;
  border-left: 3px solid #48bb78;
}

.result.error {
  background: rgba(245, 101, 101, 0.1);
  color: #c53030;
  border-left: 3px solid #f56565;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

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

.converter button:hover {
  animation: pulse 1s infinite;
  background: linear-gradient(90deg, #5a6fd6, #6a429a);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

/* Responsive design */
@media (max-width: 768px) {
  .converter {
    padding: 25px;
  }
  
  .converter h1 {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .converter {
    padding: 20px;
  }
  
  .converter h1 {
    font-size: 1.6rem;
    margin-bottom: 20px;
  }
  
  .converter input,
  .converter select,
  .converter button {
    padding: 10px;
    font-size: 0.95rem;
  }
  
  .result {
    font-size: 1rem;
    padding: 12px;
  }
}