body {
  font-family: system-ui, sans-serif;
  background: #f7f9fc;
  color: #222;
  margin: 0;
  padding: 2rem;
}

main {
  max-width: 700px;
  margin: auto;
  background: white;
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
}

h1 {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 0.25rem;
}

p {
  text-align: center;
  margin-top: 0;
  color: #666;
}

.form-section h2 {
  margin-top: 2rem;
}

.skirt-options {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  flex-wrap: wrap;
  margin: 1rem 0;
}

.option {
  flex: 1;
  text-align: center;
  padding: 1rem;
  border: 2px solid #ccc;
  border-radius: 0.75rem;
  cursor: pointer;
  transition: 0.3s;
  background: #fff;
}

.option i {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  display: block;
}

.option strong {
  display: block;
  margin-bottom: 0.25rem;
}

.option span {
  font-size: 0.85rem;
  color: #666;
}

.option.active {
  border-color: #007bff;
  background: #eaf3ff;
  color: #007bff;
}

.inputs {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.inputs div {
  flex: 1;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

input[type="number"] {
  width: 100%;
  box-sizing: border-box;
  padding: 0.6rem;
  border: 1px solid #ccc;
  border-radius: 0.5rem;
  font-size: 1rem;
}

#result {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid #ddd;
}

#result p {
  font-size: 1.1rem;
  margin: 0.5rem 0;
}