body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #121212;
  color: #f0f0f0;
  text-align: center;
  margin: 0;
  padding: 40px;
}

h1 {
  font-size: 28px;
  margin-bottom: 20px;
  color: #f1c40f;
}

input {
  padding: 10px;
  width: 280px;
  font-size: 16px;
  border: 1px solid #444;
  border-radius: 6px;
  background-color: #1e1e1e;
  color: #fff;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  background-color: #f1c40f;
  color: #000;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  margin-left: 10px;
  font-weight: bold;
}

button:hover {
  background-color: #d4ac0d;
}

table {
  margin: 30px auto;
  width: 95%;
  border-collapse: collapse;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

th, td {
  padding: 12px 16px;
  border-bottom: 1px solid #333;
}

th {
  background-color: #1e1e1e;
  color: #f1c40f;
  font-weight: 600;
}

tr:hover {
  background-color: #1c1c1c;
}

a {
  color: #f1c40f;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.summary-row {
  background-color: #162414;
  font-weight: bold;
  text-align: right;
  color: #f1c40f;
}

.buy {
  color: #27ae60;
  font-weight: bold;
}

.sell {
  color: #e74c3c;
  font-weight: bold;
}