/* General */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: #001d57; /* Latar belakang biru gelap */
}

.container {
  background: white;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
  width: 100%;
  max-width: 400px;
}

/* Header */
header h1 {
  text-align: center;
  margin-bottom: 20px;
  color: #001d57;
  font-size: 22px;
  font-weight: bold;
}

/* Form Groups */
.form-group {
  margin-bottom: 15px;
}

label {
  display: block;
  margin-bottom: 8px;
  color: #333;
  font-weight: bold;
}

input, select {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  border: 1px solid #ddd;
  border-radius: 8px;
  transition: border-color 0.3s ease;
}

input:focus, select:focus {
  border-color: #87cefa;
  outline: none;
}

/* Swap Button */
.swap-group {
  text-align: center;
  margin: 15px 0;
}

#swapButton {
  background-color: #87CEFA; /* Biru Langit */
  border: none;
  border-radius: 50%;
  padding: 15px;
  font-size: 18px;
  color: white;
  cursor: pointer;
  box-shadow: 0 6px 10px rgba(0, 0, 0, 0.2);
  transition: background-color 0.3s ease, transform 0.2s ease;
}

#swapButton:hover {
  background-color: #5faad7; /* Biru Langit Gelap */
  transform: scale(1.1);
}

/* Convert Button */
.convert-button {
  background-color: #007bff;
  border: none;
  border-radius: 8px;
  padding: 14px 20px;
  font-size: 18px;
  color: white;
  font-weight: bold;
  cursor: pointer;
  width: 100%;
  box-shadow: 0 6px 10px rgba(0, 0, 0, 0.2);
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.convert-button:hover {
  background-color: #0056b3;
  transform: scale(1.05);
}

/* Result Box */
.result-box {
  margin-top: 15px;
  padding: 15px;
  font-size: 16px;
  color: #333;
  text-align: center;
  background-color: #f0f4ff;
  border: 1px solid #87cefa;
  border-radius: 8px;
}

/* Footer */
footer {
  text-align: center;
  margin-top: 20px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
}