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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #001F3F; /* Background biru tua */
  display: flex;
  justify-content: center;
  align-items: flex-start; /* Posisi atas */
  min-height: 100vh;
  padding: 20px;
  overflow-y: auto; /* Scroll vertikal */
}

.container {
  background: #ffffff;
  border-radius: 20px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15); /* Bayangan tegas */
  padding: 40px;
  width: 100%;
  max-width: 600px; /* Ukuran lebih besar */
  margin-bottom: 20px;
}

header h1 {
  font-size: 28px; /* Ukuran header lebih besar */
  color: #333;
  text-align: center;
  margin-bottom: 30px;
}

label {
  display: block;
  font-size: 16px;
  font-weight: bold;
  margin-bottom: 8px;
  color: #555;
}

input {
  padding: 15px;
  width: 100%;
  font-size: 18px; /* Font input lebih besar */
  border-radius: 10px;
  border: 1px solid #ccc;
  margin-bottom: 20px;
  text-align: center;
  font-weight: bold;
}

.currency-selectors {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.input-group select {
  padding: 15px;
  font-size: 16px;
  border-radius: 10px;
  border: 1px solid #ccc;
  width: 100%;
}

/* Tombol swap */
.swap-group {
  display: flex;
  justify-content: center;
  margin: 20px 0;
}

#swapButton {
  background-color: #ffffff;
  color: #007BFF;
  border: 2px solid #ccc;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  font-size: 22px; /* Ukuran font lebih besar */
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  transition: background-color 0.3s ease;
}

#swapButton:hover {
  background-color: #f1f1f1;
}

.result-box {
  margin-top: 20px;
  font-size: 18px;
  font-weight: bold;
  color: #333;
  background-color: #f8f8f8;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

button[type="submit"] {
  padding: 15px;
  background-color: #00BFFF; /* Warna biru langit */
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 18px; /* Font lebih besar */
  cursor: pointer;
  width: 100%;
  transition: background-color 0.3s ease;
}

button[type="submit"]:hover {
  background-color: #1E90FF; /* Warna biru hover */
}

footer {
  margin-top: 30px;
  font-size: 14px;
  color: #666;
  text-align: center;
}

/* Responsiveness */
@media (max-width: 768px) {
  .container {
    padding: 20px;
    max-width: 95%;
  }

  input {
    font-size: 16px; /* Font input lebih kecil untuk mobile */
  }

  select {
    font-size: 14px;
    padding: 12px;
  }

  #swapButton {
    width: 50px;
    height: 50px;
    font-size: 20px;
  }

  button[type="submit"] {
    font-size: 16px;
    padding: 12px;
  }

  header h1 {
    font-size: 24px;
  }
}

@media (min-width: 769px) {
  .container {
    max-width: 700px;
  }
}