body {
  background-color: #0f0f0f;
  color: #e4e6eb;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 0;
  animation: fadeIn 1s ease-in;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.alert {
  background-color: #ff3860;
  color: #fff;
  padding: 15px;
  text-align: center;
  font-weight: bold;
  font-size: 1rem;
  animation: slideDown 0.5s ease-in-out;
}
@keyframes slideDown {
  from { transform: translateY(-50px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.container {
  padding: 40px 20px;
  text-align: center;
}
h1 {
  font-size: 2.5rem;
  margin-bottom: 30px;
  color: #00d1b2;
  animation: pulse 2s infinite alternate;
}
@keyframes pulse {
  from { color: #00d1b2; }
  to { color: #23d160; }
}
.cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}
.card {
  background: linear-gradient(135deg, #2c3e50, #4ca1af);
  color: #fff;
  border: none;
  margin: 10px;
  padding: 25px;
  width: 260px;
  border-radius: 15px;
  box-shadow: 0 0 15px rgba(0, 209, 178, 0.5);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
  transform: translateY(-10px) scale(1.05);
  box-shadow: 0 0 25px rgba(0, 209, 178, 0.8);
}
.card h2 {
  color: #ffd700;
  margin-bottom: 10px;
}
.card p {
  margin: 5px 0;
}
.card button {
  background-color: #ffdd57;
  border: none;
  color: #000;
  padding: 10px 15px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: bold;
  margin-top: 10px;
  transition: background-color 0.3s ease;
}
.card button:hover {
  background-color: #ffe082;
}
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0; top: 0;
  width: 100%; height: 100%;
  background-color: rgba(0,0,0,0.85);
}
.modal-content {
  background: #1c1c1c;
  margin: 10% auto;
  padding: 30px;
  width: 90%;
  max-width: 450px;
  color: #fff;
  border-radius: 10px;
  position: relative;
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}
.modal-content .wallet {
  word-break: break-word;
  font-weight: bold;
  font-size: 1.1rem;
  color: #00d1b2;
}
.close {
  position: absolute;
  top: 10px; right: 20px;
  color: #ff3860;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
}