/* HUD y capas comunes de los modos 3D del lab (se apoya en los tokens de nucleo.css) */
body { overflow: hidden; }
#escena { position: fixed; left: 0; right: 0; top: 0; bottom: 0; touch-action: none; }
#escena canvas { display: block; width: 100%; height: 100%; }
.hud { position: fixed; top: 0; left: 0; right: 0; z-index: 3; display: grid; grid-template-columns: 1fr auto 1fr; align-items: start;
  gap: 12px; padding: 16px clamp(16px, 3vw, 40px); pointer-events: none; }
.hud a, .hud button { pointer-events: auto; }
.hud .izq { display: flex; gap: clamp(14px, 2vw, 26px); align-items: center; min-width: 0; }
.hud .der { display: flex; justify-content: flex-end; gap: clamp(14px, 2vw, 26px); align-items: center; min-width: 0; }
.volver { color: var(--texto); text-decoration: none; display: inline-grid; place-items: center; width: 42px; height: 42px; flex: none;
  border: 1px solid var(--linea); border-radius: 999px; font-size: 18px; background: rgba(13,13,16,.6); }
.volver:hover { border-color: var(--acento); }
.dato .k { font-size: 10px; letter-spacing: .18em; color: var(--tenue); text-transform: uppercase; white-space: nowrap; }
.dato .v { font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }
.centro { text-align: center; }
.grande .v { font-family: Unbounded, sans-serif; font-size: clamp(26px, 3vw, 40px); color: var(--acento); line-height: 1; }
.grande .k { margin-top: 4px; }
.barrita { width: clamp(80px, 12vw, 180px); height: 6px; border-radius: 999px; background: var(--linea); overflow: hidden; margin-top: 7px; }
.barrita i { display: block; height: 100%; width: 0; background: var(--acento); border-radius: inherit; transition: width .15s; }
.vidas { display: flex; gap: 4px; font-size: 18px; color: var(--error); margin-top: 4px; }
.vidas i.perdida { color: var(--linea-2); }
#cartel { position: fixed; left: 0; right: 0; top: 30%; z-index: 4; text-align: center; pointer-events: none; opacity: 0; }
#cartel b { display: block; font-family: Unbounded, sans-serif; font-weight: 800; font-size: clamp(34px, 6vw, 84px); color: var(--c); letter-spacing: -.02em; }
#cartel span { display: block; margin-top: 8px; font-size: 13px; letter-spacing: .16em; text-transform: uppercase; color: var(--texto); }
#cartel.ver { animation: cartel 1.6s ease-out; }
@keyframes cartel { 0% { opacity: 0; transform: scale(.85); } 12% { opacity: 1; transform: scale(1.04); } 22% { transform: scale(1); } 75% { opacity: 1; } 100% { opacity: 0; transform: translateY(-20px); } }
#teclado { position: fixed; left: 0; right: 0; bottom: 0; z-index: 3; display: none; justify-content: center;
  padding: 8px 6px calc(10px + env(safe-area-inset-bottom)); background: linear-gradient(transparent, var(--fondo) 22%); }
#teclado.ver { display: flex; }
#teclado .kb { width: 100%; }
.velo { position: fixed; inset: 0; z-index: 5; display: grid; place-items: center; padding: 16px; background: rgba(13,13,16,.74); }
.velo[hidden] { display: none; }
.carta { width: min(460px, 100%); background: var(--panel); border: 1px solid var(--linea); border-radius: 14px; padding: 28px; }
.carta h2 { margin: 0 0 8px; font-family: Unbounded, sans-serif; font-size: 30px; letter-spacing: -.02em; line-height: 1.1; }
.carta h2 span { color: var(--acento); }
.carta p { margin: 0 0 22px; color: #a3a1ab; font-size: 14px; line-height: 1.6; }
.carta .num { font-family: Unbounded, sans-serif; font-size: 44px; color: var(--acento); margin: 4px 0 14px; }
.carta ul { list-style: none; margin: 0 0 22px; padding: 0; display: grid; gap: 10px; }
.carta li { display: flex; gap: 12px; align-items: flex-start; font-size: 14px; line-height: 1.5; color: #c9c7cf; }
.carta li i { color: var(--acento); font-size: 18px; margin-top: 1px; }
.empezar { width: 100%; height: 52px; border-radius: 999px; border: 0; background: var(--acento); color: var(--acento-tinta);
  font: 700 15px "JetBrains Mono", monospace; letter-spacing: .06em; cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 10px; }
.empezar:active { transform: translateY(1px); }
.empezar kbd { font: inherit; font-size: 11px; padding: 3px 7px; border-radius: 6px; background: rgba(0,0,0,.14); }
@media (max-width: 760px) {
  .hud { padding: 12px 14px; }
  .hud .solo-desk { display: none; }
  .dato .v { font-size: 18px; }
  .barrita { width: 58px; }
  .hud { gap: 8px; }
  .hud .izq, .hud .der { gap: 12px; }
  .grande .v { font-size: 24px; }
  .vidas { font-size: 13px; gap: 2px; }
  .volver { width: 38px; height: 38px; }
}
@media (pointer: coarse) { .empezar kbd { display: none; } }