body {
  margin: 0;
  padding: 0;
  font-family: "Inter", sans-serif;
  background-color: #f5f7fa;
  color: #333;
}

.container {
  max-width: 700px;
  margin: 3rem auto;
  padding: 2rem;
  background-color: #ffffff;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
}

h1 {
  text-align: center;
  color: #2d3748;
  margin-bottom: 2rem;
}

.assignment {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr auto;
  gap: 1rem;
  margin-bottom: 1rem;
  align-items: center;
}

input[type="text"],
input[type="number"] {
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 1rem;
  background-color: #f9f9f9;
}

.delete-button {
  background-color: transparent;
  color: #e53e3e;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
}

.delete-button:hover {
  color: #c53030;
}

.buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

button {
  padding: 0.75rem 1.25rem;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background-color: #4f46e5;
  color: white;
  transition: background-color 0.2s;
}

button:hover {
  background-color: #4338ca;
}

.results {
  margin-top: 2rem;
  text-align: center;
}

#result {
  font-size: 1.5rem;
  color: #1a202c;
}

#target {
  font-size: 1.1rem;
  color: #4a5568;
  margin-top: 0.5rem;
}

@media (max-width: 768px) {
  .container {
    margin: 1rem;
    padding: 1rem;
  }

  .assignment {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .buttons {
    flex-direction: column;
    align-items: center;
  }

  button {
    width: 100%;
  }
}