:root{
  --bg-1:#f2f5f8;
  --bg-2:#ffffff;
  --accent:#4f8cff;
  --accent-light:#4f8cff;
  --text:#1d1d1d;
  --radius:14px;
  --shadow:0 4px 10px rgba(0,0,0,.1);
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:"Poppins",Arial,sans-serif;
  background:var(--bg-1);color:var(--text);
  display:flex;flex-direction:column;
}

header{padding:14px 24px;background:var(--bg-2);box-shadow:var(--shadow)}
header h1{font-size:1.3rem;font-weight:600}

main#app{
  flex:1;display:flex;gap:24px;padding:24px;
  max-width:1600px;width:100%;margin:auto;
}

#sceneWrapper{
  flex:1 1 0;min-width:280px;min-height:500px;
  background:#000;border-radius:var(--radius);box-shadow:var(--shadow);
  position:relative;overflow:hidden;
}
#scene{width:100%;height:100%;}

#panel{
  width:280px;flex-shrink:0;display:flex;flex-direction:column;gap:18px;
  background:var(--bg-2);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;
}

input[type=file]{background:var(--accent-light);padding:10px;border-radius:var(--radius);border:none;font-size:.9rem}
.axis-row{display:flex;gap:8px}
button{cursor:pointer;padding:10px 14px;border:none;border-radius:var(--radius);font-size:.9rem;font-weight:500;transition:transform .15s}
button:hover{transform:translateY(-2px)}
button.active,button.primary{background:var(--accent);color:#fff}
button.secondary{background:var(--accent-light);color:var(--accent)}
button.secondary.light{background:transparent;color:var(--text)}
button:disabled{opacity:.5;cursor:not-allowed;transform:none}

label.stack{display:flex;flex-direction:column;gap:4px;font-size:.85rem}
input[type=number]{padding:6px 10px;border-radius:8px;border:1px solid #cbd6e2;font-size:.9rem}
.hint{font-size:.72rem;line-height:1.3;color:#666}

.modal{position:fixed;inset:0;background:rgba(0,0,0,.45);display:flex;justify-content:center;align-items:center;z-index:99}
.hidden{display:none}
.modal-content{
  width:clamp(280px,90vw,480px);max-height:90vh;
  background:var(--bg-2);border-radius:var(--radius);
  padding:24px;display:flex;flex-direction:column;gap:18px;box-shadow:var(--shadow)
}
.modal-content h2{font-size:1.1rem;font-weight:600}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-grid label{display:flex;flex-direction:column;font-size:.85rem;gap:4px}
.preview-box{flex:1;border:1px solid #dfe4ea;border-radius:8px;background:#fafafa;padding:8px;overflow:auto}
.buttons-row{display:flex;gap:12px}

@media(max-width:960px){
  main#app{flex-direction:column}
  #panel{width:100%;flex-direction:row;flex-wrap:wrap;gap:12px;padding:16px}
  #panel label.stack,#panel button.primary{flex:1}
  #sceneWrapper{height:60vh;min-height:60vh}
}

/* Popup contraseña */
.modal-content.pwd{gap:14px;width:clamp(260px,80vw,340px)}
.modal-content.pwd input{
  padding:8px 10px;border:1px solid #cbd6e2;border-radius:var(--radius);
  font-size:.9rem;width:100%;
}
.pwd-msg{font-size:.8rem;color:#d9534f;text-align:center}

/* … estilos anteriores idénticos … */
.form-grid label{display:flex;flex-direction:column;font-size:.85rem;gap:4px}
.form-grid select{padding:6px 10px;border:1px solid #cbd6e2;border-radius:8px;font-size:.9rem}

/* popup contraseña extra */
.modal-content.pwd{gap:14px;width:clamp(260px,80vw,340px)}
.modal-content.pwd input{padding:8px 10px;border:1px solid #cbd6e2;border-radius:var(--radius);font-size:.9rem;width:100%}
.pwd-msg{font-size:.8rem;color:#d9534f;text-align:center}



.centrado {
  text-align: center; /* Centra el texto horizontalmente */
  margin-top: 0px;
  margin-bottom: 0px;
}

.centrado h4 {
  font-size: 1.8rem;
  margin: 0;
}

.centrado h6 {
  font-size: 1rem;
  font-weight: normal;
  color: #555;
  margin-top: 5px;
}