/* Estilos generales de form.html */
* {
  margin: 0; padding: 0; box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}
body {
  background: linear-gradient(135deg, #1e1e2f, #2a2a3b);
  color: #fff; text-align: center; padding: 20px;
  display: flex; flex-direction: column; min-height: 100vh;
}
header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 15px 20px; background: rgba(255,255,255,0.1); border-radius: 10px;
  margin-bottom: 30px;
}
#img-santuli { width:60px; height:60px; border-radius:50%; border:2px solid #fff; }
#titulo-SEM { font-size:2rem; font-weight:bold; }
.logo-SEM { width:50px; height:50px; border-radius:50%; }
main { flex:1; max-width:600px; margin:0 auto; width:100%; }
h1 { margin-bottom:20px; font-size:2.5rem; text-transform:uppercase; letter-spacing:2px; }
form {
  background: rgba(255,255,255,0.1); padding:20px; border-radius:10px;
}
label { display:block; margin-top:15px; text-align:left; font-weight:500; }
input, textarea, button {
  width:100%; padding:10px; margin-top:5px; border:none; border-radius:5px; font-size:1rem;
}
input, textarea {
  background: rgba(255,255,255,0.15); color:#fff;
}
input::placeholder, textarea::placeholder {
  color: rgba(255,255,255,0.6);
}
button {
  background:#ff9f1c; color:#1e1e2f; font-weight:bold; cursor:pointer;
  transition:background 0.3s, transform 0.2s; margin-top:20px;
}
button:hover {
  background:#ffcc00; transform:translateY(-2px);
}
footer {
  margin-top:30px; padding:15px;
  background:rgba(255,255,255,0.1); border-radius:10px;
  font-size:0.9rem;
}
@media (max-width:768px) {
  h1 { font-size:2rem; }
  header { flex-direction:column; gap:15px; }
}

/* Estilo del botón “Volver” */
.btn-volver {
  display: inline-block;
  margin: 20px 0;
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.1);
  color: #ff9f1c;
  font-weight: bold;
  text-decoration: none;
  border: 2px solid #ff9f1c;
  border-radius: 5px;
  transition: background 0.3s, color 0.3s, transform 0.2s;
}

.btn-volver:hover {
  background: #ff9f1c;
  color: #1e1e2f;
  transform: translateY(-2px);
}