/* === Relieve 3D — cinco montes y Gernika en la cabecera del index === */
/* CSS 3D nativo (perspective + translateZ), sin librerías ni dependencias. */

.v34-relief {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: clamp(110px, 18vw, 170px);
  z-index: 1;
  perspective: 900px;
  pointer-events: none;
  overflow: hidden;
}

.v34-relief-3d {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.3s ease-out;
  will-change: transform;
}

.v34-relief-layer {
  position: absolute;
  inset: 0;
}

.v34-relief-back {
  transform: translateZ(-150px) scale(1.3);
  opacity: 0.32;
  filter: blur(1.5px);
}

.v34-relief-mid {
  transform: translateZ(-65px) scale(1.12);
  opacity: 0.5;
  filter: blur(0.6px);
}

.v34-relief-front {
  transform: translateZ(25px);
}

.v34-relief-peak {
  position: absolute;
  bottom: 0;
  left: var(--x, 50%);
  transform: translateX(-50%);
}

.v34-relief-peak svg {
  display: block;
  width: var(--w, 40px);
  height: auto;
}

.v34-relief-glyph {
  fill: none;
  stroke: var(--col, var(--v34-brass-2, #e4aa4b));
  stroke-width: 3.2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.v34-relief-front .v34-relief-peak {
  pointer-events: auto;
  cursor: default;
}

.v34-relief-front .v34-relief-peak b {
  position: absolute;
  left: 50%;
  bottom: 100%;
  transform: translateX(-50%) translateY(-4px);
  white-space: nowrap;
  font: 700 0.68rem/1 var(--mono, ui-monospace, monospace);
  letter-spacing: 0.02em;
  color: var(--v34-brass-2, #e4aa4b);
  opacity: 0;
  transition: opacity 0.18s ease;
}

.v34-relief-front .v34-relief-peak:hover b,
.v34-relief-front .v34-relief-peak:focus-visible b {
  opacity: 1;
}

.v34-relief-gernika {
  position: absolute;
  left: var(--x, 50%);
  bottom: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--v34-brass-2, #e4aa4b);
  box-shadow: 0 0 16px 3px rgba(226, 170, 76, 0.65);
  transform: translateX(-50%);
  pointer-events: auto;
}

.v34-relief-gernika::after {
  content: 'Gernika';
  position: absolute;
  left: 50%;
  bottom: 100%;
  transform: translateX(-50%) translateY(-4px);
  white-space: nowrap;
  font: 700 0.68rem/1 var(--mono, ui-monospace, monospace);
  color: var(--v34-bone, #f4f0e6);
  opacity: 0;
  transition: opacity 0.18s ease;
}

.v34-relief-gernika:hover::after,
.v34-relief-gernika:focus-visible::after {
  opacity: 1;
}

@media (max-width: 680px) {
  .v34-relief {
    height: 90px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .v34-relief-3d {
    transition: none !important;
  }
}