body {
  background-color: #111;
  color: #fff;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 0;
  text-align: center;
}

h1 {
  margin-top: 40px;
  font-size: 32px;
  color: #00ffd8;
}

#tokenRate {
  margin: 10px 0 30px;
  font-size: 18px;
  color: #ccc;
}

button {
  padding: 10px 20px;
  border: none;
  background-color: #00ffd8;
  color: #000;
  font-weight: bold;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover {
  background-color: #00cbb4;
}

input,
select {
  padding: 10px;
  border-radius: 6px;
  border: none;
  margin: 0 5px;
  background-color: #222;
  color: #fff;
  width: 150px;
}

input::placeholder {
  color: #999;
}

#walletAddress {
  margin-top: 15px;
  color: #00ff95;
  font-weight: bold;
  font-size: 14px;
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 999;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.9);
}

.modal-content {
  background-color: #222;
  margin: 10% auto;
  padding: 20px;
  border: 1px solid #888;
  width: 300px;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(0, 255, 216, 0.5);
}

.modal-content h2 {
  color: #00ffd8;
  margin-bottom: 20px;
}

.wallet-option {
  padding: 12px;
  margin: 10px 0;
  border: 1px solid #00ffd8;
  border-radius: 8px;
  cursor: pointer;
  background-color: #000;
  color: #fff;
  transition: background 0.3s;
}

.wallet-option:hover {
  background-color: #00ffd8;
  color: #000;
}

.close {
  float: right;
  font-size: 22px;
  font-weight: bold;
  cursor: pointer;
  color: #fff;
}

.close:hover {
  color: #f00;
}