body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #1e1e2f;
  color: #eee;
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 900px;
  margin: auto;
  background: #2a2a40;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0,0,0,0.3);
}

h1, h2 {
  text-align: center;
  color: #00adb5;
}

.expense-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  justify-content: center;
}

.expense-form input, .expense-form button {
  padding: 10px;
  border: none;
  border-radius: 6px;
  font-size: 16px;
}

.expense-form input {
  flex: 1;
  background: #3a3a55;
  color: #fff;
}

.expense-form button {
  background: #00adb5;
  color: #fff;
  cursor: pointer;
  transition: background 0.2s ease-in-out;
}

.expense-form button:hover {
  background: #009ba8;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 30px;
}

thead {
  background: #393963;
}

th, td {
  padding: 12px;
  text-align: center;
  border-bottom: 1px solid #555;
}

.delete-btn {
  background: #ff5252;
  color: white;
  padding: 5px 10px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.delete-btn:hover {
  background: #e63946;
}

.chart-section {
  max-width: 400px;
  margin: 20px auto;
}