/* General Styles */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
  }
  
  header {
    background: #333;
    color: #fff;
    padding: 10px 20px;
    text-align: left;
  }
  
  nav {
    position: fixed;
    top: 0;
    right: 0;
  }
  
  .menu-toggle {
    display: none;
  }
  
  .hamburger {
    font-size: 24px;
    cursor: pointer;
    display: inline-block;
  }
  
  .menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: none;
    position: absolute;
    top: 40px;
    right: 0;
    background: #333;
    border: 1px solid #444;
  }
  
  .menu li {
    padding: 10px 20px;
  }
  
  .menu a {
    color: #fff;
    text-decoration: none;
  }
  
  .menu-toggle:checked ~ .menu {
    display: block;
  }
  
  main {
    padding: 20px;
  }
  
  footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    bottom: 0;
    width: 100%;
}

/* Converter UI */
.converter-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 80px;
}

.converter-panel {
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 20px;
  width: min(640px, 95%);
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

#conversion-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 16px;
}

#conversion-tabs .tab {
  margin: 4px;
  padding: 8px 14px;
  border: 1px solid #007bff;
  border-radius: 6px;
  background: #f8f9fa;
  color: #007bff;
  cursor: pointer;
}

#conversion-tabs .tab.selected {
  background: #007bff;
  color: #fff;
}

#conversion-tabs .tab:hover {
  filter: brightness(0.95);
}

.converter-panel label {
  display: block;
  margin: 8px 0;
  font-weight: 600;
}

.converter-panel input,
.converter-panel select {
  width: 100%;
  padding: 8px;
  margin-top: 4px;
  border-radius: 4px;
  border: 1px solid #ccc;
}

.select-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 8px 0 16px;
}

#convert-btn {
  appearance: none;
  background: #007bff;
  border: 0;
  color: white;
  padding: 10px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  width: 100%;
}

#convert-btn:hover {
  background: #0056b3;
}

#conversion-result {
  margin-top: 14px;
  font-weight: 700;
  font-size: 1rem;
}

@media (max-width: 600px) {
  .select-row {
    grid-template-columns: 1fr;
  }
}