* {
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

body {
  min-height: 100vh;
  margin: 0;
  background: linear-gradient(135deg, #1e3c72, #2a5298);
  display: flex;
  align-items: center;
  justify-content: center;
}

.card {
  background: #fff;
  width: 95%;
  max-width: 600px;
  padding: 20px;
  border-radius: 14px;
  box-shadow: 0 15px 40px rgba(0,0,0,0.25);
}

h1 {
  text-align: center;
  margin: 0;
  color: #1e3c72;
}

.subtitle {
  text-align: center;
  color: #666;
  margin-bottom: 15px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

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

th {
  background: #f1f3f8;
  font-size: 14px;
}

input {
  width: 70px;
  padding: 6px;
  border-radius: 6px;
  border: 1px solid #ccc;
}

button {
  cursor: pointer;
  border: none;
  border-radius: 8px;
}

.add {
  width: 100%;
  margin-top: 12px;
  padding: 10px;
  background: linear-gradient(135deg, #1e3c72, #2a5298);
  color: #fff;
  font-size: 15px;
}

.remove {
  background: #e74c3c;
  color: #fff;
  padding: 5px 8px;
}

.total {
  margin-top: 15px;
  text-align: center;
  font-size: 18px;
  font-weight: bold;
  color: #2a5298;
}