:root{
  --bg:#f3dca4;
  --line:#d44aa3;
  --right:#bfe3bf;
  --text:#1c1c1c;
  --shadow:0 10px 30px rgba(0,0,0,.12);
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:var(--sans);
  background:#fff;
  display:flex;
  justify-content:center;
  padding:22px 10px 50px;
  color:var(--text);
}
.sheet{
  width:min(860px, 100%);
  background:var(--bg);
  border:2px solid var(--line);
  box-shadow:var(--shadow);
}
h1{
  margin:0;
  padding:14px 16px 8px;
  text-align:center;
  font-size:34px;
  font-weight:900;
}
.panel{ border-top:2px solid var(--line); }
.row{
  display:grid;
  grid-template-columns: 1fr 240px;
  border-top:1px solid var(--line);
}
.label{
  padding:10px 12px;
  text-align:center;
  font-size:14px;
  letter-spacing:.4px;
  text-transform:uppercase;
  border-right:1px solid var(--line);
}
.field{
  background:var(--right);
  padding:8px 10px;
}
select, input{
  width:100%;
  padding:10px 10px;
  border:1px solid rgba(0,0,0,.25);
  border-radius:10px;
  font-size:15px;
  outline:none;
}
select:focus, input:focus{ box-shadow:0 0 0 3px rgba(0,0,0,.12); }

.middle{
  display:grid;
  grid-template-columns: 1fr 240px;
  border-top:2px solid var(--line);
  min-height:180px;
}
.dxBox{
  display:flex;
  align-items:center;
  justify-content:center;
  position:relative;
  border-right:1px solid var(--line);
}
.dxLabel{
  position:absolute;
  top:50%;
  left:50%;
  transform:translate(-50%,-50%);
  font-size:20px;
  font-weight:900;
  letter-spacing:2px;
  opacity:.75;
}
.dxSelect{
  position:absolute;
  right:14px;
  top:50%;
  transform:translateY(-50%);
  width:170px;
  font-weight:800;
}
.resultBox{
  background:var(--right);
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  border-left:1px solid var(--line);
}
.resultLabel{
  padding:12px 10px;
  text-align:center;
  border-bottom:1px solid var(--line);
  font-weight:900;
  letter-spacing:.6px;
}
.resultValue{
  flex:1;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  font-size:34px;
  font-weight:1000;
  font-family:var(--mono);
}
.unit{
  font-size:14px;
  font-family:var(--sans);
  font-weight:800;
  opacity:.8;
}
.status{
  border-top:2px solid var(--line);
  padding:10px 12px;
  background:#fff;
  text-align:center;
  font-weight:800;
}
.hint{
  padding:8px 12px 12px;
  text-align:center;
  font-weight:800;
  color:#0b3d2e;
}
.footer{
  border-top:2px solid var(--line);
  padding:10px 12px;
  text-align:center;
  background:#f0b060;
  font-weight:900;
}
@media (max-width: 650px){
  .row, .middle{ grid-template-columns: 1fr; }
  .label{ border-right:none; border-bottom:1px solid var(--line); }
  .dxBox{ min-height:120px; border-right:none; border-bottom:1px solid var(--line); }
  .dxSelect{ position:static; transform:none; margin-top:14px; width:min(240px, 90%); }
}


/* --- BSA / Superficie corporal (Du Bois) --- */
.bsa{
  border-top:2px solid var(--line);
  background:#fff7dd;
  padding:12px 12px 14px;
  display:none; /* se habilita solo cuando corresponde */
}
.bsaTitle{
  text-align:center;
  font-weight:1000;
  letter-spacing:.4px;
  margin-bottom:10px;
}
.bsaGrid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:10px;
  margin-bottom:10px;
}
.bsaLabel{
  font-size:12px;
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:.35px;
  margin-bottom:6px;
  text-align:center;
}
.bsaActions{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  flex-wrap:wrap;
}
.bsaActions button{
  padding:10px 12px;
  border-radius:10px;
  border:1px solid rgba(0,0,0,.25);
  background:#f0b060;
  font-weight:1000;
}
.bsaOut{
  font-family:var(--mono);
  font-weight:1000;
}
.bsaNote{
  margin-top:8px;
  text-align:center;
  font-size:12px;
  font-weight:800;
  color:#3a3a3a;
  opacity:.9;
}
/* Inputs deshabilitados: que se note */
input:disabled{
  opacity:.55;
  filter:grayscale(.25);
  cursor:not-allowed;
}
@media (max-width: 650px){
  .bsaGrid{ grid-template-columns: 1fr; }
}

/* Volver */
.backBtn{
  position:sticky;
  top:10px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:10px 0 0 10px;
  padding:8px 12px;
  border-radius:12px;
  text-decoration:none;
  color:#1c1c1c;
  font-weight:1000;
  border:1px solid rgba(0,0,0,.25);
  background:#fff;
  box-shadow:0 8px 18px rgba(0,0,0,.10);
}
.backBtn:hover{ filter:brightness(.98); }

/* Volver (abajo) */
.backWrap{
  border-top:2px solid var(--line);
  background:#fff;
  padding:10px 12px;
  display:flex;
  justify-content:center;
}
.backBtn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 14px;
  border-radius:12px;
  text-decoration:none;
  color:#1c1c1c;
  font-weight:1000;
  border:1px solid rgba(0,0,0,.25);
  background:#fff;
  box-shadow:0 8px 18px rgba(0,0,0,.10);
}
.backBtn:hover{ filter:brightness(.98); }