.legacy{font-family:"Segoe UI", Tahoma, Geneva, Verdana, sans-serif;background-color:var(--bg-color);color:var(--text-main);}
.legacy .container{background-color:var(--card-bg);border-radius:20px;box-shadow:var(--shadow);border:1px solid var(--border-color);}
.legacy h1{
  text-align:center;
  margin-bottom:10px;
}
.legacy p.intro{
  text-align:center;
  color:var(--muted);
  margin-bottom:30px;
}
.legacy .form-group{ margin-bottom:20px; }
.legacy .form-row{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:20px;
  margin-bottom:25px;
}
@media (max-width: 600px){.legacy .form-row{ grid-template-columns:1fr; }}
.legacy label{
  font-weight:600;
  margin-bottom:6px;
  display:block;
}
.legacy input[type="number"]{
  width:100%;
  padding:14px;
  border:2px solid var(--border-color);
  border-radius:10px;
  font-size:1em;
  background-color:var(--card-bg);
  color:var(--text-main);
}
.legacy .checkbox-group{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(200px, 1fr));
  gap:15px;
  margin-bottom:25px;
}
.legacy .checkbox-item{
  display:flex;
  align-items:flex-start;
  padding:15px;
  border:2px solid var(--border-color);
  border-radius:12px;
  background-color:var(--card-bg);
}
.legacy .checkbox-item input{
  margin-right:10px;
  transform:scale(1.2);
}
.legacy .btn-calcular{
  width:100%;
  padding:18px;
  background: linear-gradient(135deg, #28a745, #20c997);
  color:white;
  border:none;
  border-radius:12px;
  font-size:1.2em;
  cursor:pointer;
}
.legacy #result{ margin-top:30px; }
.legacy table{
  width:100%;
  border-collapse:collapse;
  margin-top:20px;
}
.legacy th, .legacy td{
  padding:12px;
  text-align:right;
}
.legacy th{ text-align:left; }
.legacy tr.final td{
  font-size:1.3em;
  font-weight:bold;
  color:#28a745;
}