/* General */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f6f8;
  color: #333;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  text-align: center;
  background: #4cafef;
  color: white;
  padding: 2rem 1rem;
}

main {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 2rem;
}

.donation-box {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  text-align: center;
  width: 100%;
  max-width: 400px;
}

button {
  background: #4cafef;
  color: white;
  border: none;
  padding: 12px 20px;
  margin: 10px 0;
  border-radius: 8px;
  cursor: pointer;
  width: 100%;
  font-size: 1rem;
  transition: background 0.3s ease;
}

button:hover {
  background: #3a9ad9;
}

.custom-donation {
  margin-top: 2rem;
  text-align: left;
}

label {
  display: block;
  margin: 0.5rem 0 0.2rem;
}

input {
  width: 100%;
  padding: 10px;
  margin-bottom: 1rem;
  border-radius: 6px;
  border: 1px solid #ccc;
}

#calculatedAmount {
  font-weight: bold;
  margin-top: 0.5rem;
}

footer {
  text-align: center;
  padding: 1rem;
  background: #eee;
}