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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #121212;
  color: #f0f0f0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  padding: 20px;
}

.container {
  background-color: #1e1e1e;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  max-width: 500px;
  width: 100%;
  text-align: center;
}

h1 {
  margin-bottom: 30px;
  font-size: 24px;
  color: #00ffff;
}

form {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

input[type="text"] {
  padding: 12px;
  border: none;
  border-radius: 8px;
  background-color: #2a2a2a;
  color: #ffffff;
  font-size: 16px;
}

input[type="text"]:focus {
  outline: none;
  border: 1px solid #00ffff;
}

button {
  padding: 12px;
  background: linear-gradient(to right, #00ffff, #0077ff);
  border: none;
  border-radius: 8px;
  color: #000;
  font-weight: bold;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background: linear-gradient(to right, #0077ff, #00ffff);
}

#balanceResult {
  margin-top: 20px;
  font-size: 18px;
  color: #ffffff;
}