body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #121212;
  color: #e0e0e0;
}

.container {
  max-width: 800px;
  margin: auto;
  padding: 20px;
}

h1 {
  text-align: center;
  font-size: 2.5em;
  margin-bottom: 20px;
}

.orange { color: orange; }
.white { color: white; }
.green { color: green; }

.card {
  background-color: #1e1e1e;
  padding: 20px;
  border-radius: 15px;
  box-shadow: 0 0 15px #000;
  margin-bottom: 20px;
}

button {
  background-color: #333;
  color: #fff;
  border: none;
  padding: 12px 20px;
  border-radius: 10px;
  cursor: pointer;
  margin-top: 10px;
}

button:hover {
  background-color: #555;
}

input {
  padding: 10px;
  margin: 5px;
  border-radius: 10px;
  border: none;
  width: calc(100% - 22px);
}

.tx-section {
  background-color: #222;
  padding: 15px;
  border-radius: 10px;
  margin-bottom: 10px;
}

.hidden { display: none; }