body {
  font-family: Arial, sans-serif;
  background: #f2f2f2;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 800px;
  margin: 20px auto;
  padding: 15px;
}

h2 {
  text-align: center;
  margin-bottom: 20px;
}

.card {
  background: #fff;
  padding: 15px;
  margin-bottom: 15px;
  border-radius: 6px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

input, select, button {
  width: 100%;
  padding: 10px;
  margin-top: 8px;
  box-sizing: border-box;
}

button {
  background: #007bff;
  color: white;
  border: none;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  background: #0056b3;
}

.pdf-btn {
  background: green;
  margin-top: 10px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

table, th, td {
  border: 1px solid #ccc;
}

th, td {
  padding: 8px;
  text-align: center;
}

.total {
  text-align: right;
  margin-top: 10px;
}

/* Mobile friendly */
@media (max-width: 600px) {
  table {
    font-size: 12px;
  }

  input, select, button {
    font-size: 14px;
  }
}