/* ==========================================================================
   Componentes reutilizables
   ========================================================================== */

/* ---------- Botones ---------- */

.btn {
  --btn-bg: var(--navy-700);
  --btn-fg: var(--on-dark);
  --btn-bd: var(--line-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0.75rem 1.35rem;
  border: 1px solid var(--btn-bd);
  border-radius: var(--r-pill);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-weight: 600;
  font-size: var(--step-0);
  letter-spacing: 0.005em;
  text-align: center;
  cursor: pointer;
  transition:
    transform var(--t-fast) var(--ease),
    box-shadow var(--t-mid) var(--ease),
    background-color var(--t-mid) var(--ease),
    border-color var(--t-mid) var(--ease),
    opacity var(--t-mid) var(--ease);
}

.btn:active { transform: scale(0.97); }

.btn[disabled],
.btn[aria-disabled='true'] {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.btn--primary {
  --btn-bg: linear-gradient(135deg, var(--sunset-hi), var(--sunset) 58%, var(--gold-deep));
  --btn-fg: oklch(0.16 0.04 40);
  --btn-bd: transparent;
  font-weight: 700;
  box-shadow: var(--shadow-glow);
}
.btn--primary:hover { box-shadow: 0 14px 34px -12px oklch(0.685 0.196 42 / 0.7); }

.btn--gold {
  --btn-bg: linear-gradient(135deg, var(--gold), var(--gold-deep));
  --btn-fg: oklch(0.20 0.05 70);
  --btn-bd: transparent;
  font-weight: 700;
}

.btn--ghost {
  --btn-bg: oklch(1 0 0 / 0.06);
  --btn-fg: var(--on-dark);
  --btn-bd: var(--line-strong);
  backdrop-filter: blur(10px);
}
.btn--ghost:hover { --btn-bg: oklch(1 0 0 / 0.12); }

.btn--quiet {
  --btn-bg: transparent;
  --btn-bd: transparent;
  --btn-fg: var(--on-dark-mid);
  min-height: 40px;
  padding: 0.4rem 0.75rem;
  font-weight: 500;
}
.btn--quiet:hover { --btn-fg: var(--on-dark); }

.btn--danger {
  --btn-bg: transparent;
  --btn-bd: oklch(0.640 0.200 25 / 0.45);
  --btn-fg: var(--danger-soft);
}
.btn--danger:hover { --btn-bg: oklch(0.640 0.200 25 / 0.12); }

.btn--wa {
  /* verde de WhatsApp oscurecido: con el verde claro, el texto blanco quedaba
     en 3,32:1. Así se mantiene el color reconocible y se lee */
  --btn-bg: oklch(0.52 0.132 152);
  --btn-fg: oklch(0.99 0 0);
  --btn-bd: transparent;
  font-weight: 700;
}

.btn--block { width: 100%; }
.btn--sm { min-height: 40px; padding: 0.5rem 1rem; font-size: var(--step--1); }

/* Sobre fondo claro el fantasma cambia de piel para no desaparecer */
.section--light .btn--ghost,
.on-light .btn--ghost {
  --btn-bg: oklch(1 0 0 / 0.9);
  --btn-fg: var(--on-light);
  --btn-bd: oklch(0.235 0.045 262 / 0.22);
  backdrop-filter: none;
}
.section--light .btn--ghost:hover,
.on-light .btn--ghost:hover {
  --btn-bg: oklch(1 0 0);
  --btn-bd: oklch(0.235 0.045 262 / 0.45);
}
.section--light .empty,
.section--light .detail__note { color: var(--on-light-mid); }

/* Botón de icono */
.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: oklch(1 0 0 / 0.06);
  color: var(--on-dark);
  transition: background-color var(--t-mid) var(--ease), transform var(--t-fast) var(--ease);
}
.icon-btn:hover { background: oklch(1 0 0 / 0.14); }
.icon-btn:active { transform: scale(0.94); }
.icon-btn svg { width: 20px; height: 20px; }

/* ---------- Chips de categoría ---------- */

.chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 40px;
  padding: 0.45rem 0.95rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-strong);
  background: oklch(1 0 0 / 0.05);
  color: var(--on-dark-mid);
  font-size: var(--step--1);
  font-weight: 600;
  white-space: nowrap;
  scroll-snap-align: start;
  transition:
    background-color var(--t-mid) var(--ease),
    color var(--t-mid) var(--ease),
    border-color var(--t-mid) var(--ease),
    transform var(--t-fast) var(--ease);
}
.chip:hover { color: var(--on-dark); background: oklch(1 0 0 / 0.11); }
.chip:active { transform: scale(0.96); }
.chip[aria-pressed='true'] {
  background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  border-color: transparent;
  color: oklch(0.20 0.05 70);
}

/* ---------- Rieles horizontales ---------- */

.rail {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  margin-inline: calc(var(--gutter) * -1);
  padding-inline: var(--gutter);
  padding-block: 0.25rem 0.75rem;
  /* sin esto el ajuste magnético arranca el riel desplazado por el relleno */
  scroll-padding-inline: var(--gutter);
}
.rail::-webkit-scrollbar { display: none; }
.rail > * { scroll-snap-align: start; }

.rail--chips { gap: 0.5rem; scroll-snap-type: x proximity; }

/* ---------- Tarjeta de producto ---------- */

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}
@media (min-width: 560px) { .product-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; } }
@media (min-width: 960px) { .product-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.1rem; } }

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--navy-800), var(--navy-900));
  overflow: hidden;
  transition:
    transform var(--t-mid) var(--ease),
    border-color var(--t-mid) var(--ease),
    box-shadow var(--t-mid) var(--ease);
}
@media (hover: hover) {
  .card:hover {
    transform: translate3d(0, -3px, 0);
    border-color: var(--line-strong);
    box-shadow: var(--shadow-md);
  }
}

.card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  background:
    radial-gradient(80% 80% at 50% 20%, var(--navy-700), var(--navy-950));
  overflow: hidden;
}
.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--t-slow) var(--ease-soft);
}
@media (hover: hover) { .card:hover .card__media img { transform: scale(1.045); } }

.card__media[data-fallback] img { display: none; }
.card__media[data-fallback]::after {
  content: attr(data-fallback);
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 0.75rem;
  text-align: center;
  font-family: var(--font-display);
  font-size: var(--step--1);
  color: var(--gold);
  background:
    radial-gradient(120% 90% at 50% 110%, oklch(0.685 0.196 42 / 0.28), transparent 70%),
    var(--navy-900);
}

.card__body {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.7rem 0.75rem 0.75rem;
  flex: 1;
}
@media (min-width: 560px) { .card__body { padding: 0.85rem 0.95rem 0.95rem; } }

.card__name {
  font-family: var(--font-ui);
  font-size: var(--step-0);
  font-weight: 650;
  line-height: 1.25;
  letter-spacing: -0.008em;
  color: var(--on-dark);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__desc {
  font-size: var(--step--1);
  line-height: 1.42;
  color: var(--on-dark-low);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
@media (max-width: 559px) { .card__desc { display: none; } }

.card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.5rem;
}
/* pantallas muy estrechas: un precio de seis cifras se montaba encima del
   botón naranja de agregar */
@media (max-width: 359px) {
  .card__foot { gap: 0.3rem; }
  .card__price b { font-size: 0.95rem; }
}

.card__price {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  min-width: 0;
}
.card__price small {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--on-dark-low);
}
.card__price b {
  font-size: var(--step-1);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
  letter-spacing: -0.01em;
}

.card__add {
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-pill);
  background: linear-gradient(135deg, var(--sunset-hi), var(--sunset));
  color: oklch(0.16 0.04 40);
  box-shadow: var(--shadow-glow);
  transition: transform var(--t-fast) var(--ease), filter var(--t-mid) var(--ease);
}
.card__add:hover { filter: brightness(1.08); }
.card__add:active { transform: scale(0.9); }
.card__add svg { width: 20px; height: 20px; }
.card__add.is-added { animation: pop var(--t-slow) var(--ease); }

@keyframes pop {
  0%   { transform: scale(1); }
  45%  { transform: scale(1.22); }
  100% { transform: scale(1); }
}

.card__tag {
  position: absolute;
  top: 0.55rem;
  left: 0.55rem;
  z-index: var(--z-raised);
  padding: 0.2rem 0.55rem;
  border-radius: var(--r-pill);
  background: oklch(0.13 0.045 262 / 0.75);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line-strong);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--gold);
}

.card__open {
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: inherit;
}
/* la tarjeta recorta lo que se sale, así que el anillo de foco se dibuja hacia
   dentro; si no, con teclado no se veía dónde estaba parado */
.card__open:focus-visible { outline-offset: -3px; }
.card__foot { position: relative; z-index: 3; }

.card.is-out .card__media { filter: grayscale(0.75) brightness(0.62); }
.card.is-out .card__add { display: none; }

/* Tarjeta destacada del riel */
.card--rail { flex: 0 0 auto; width: 68vw; max-width: 290px; }
@media (min-width: 560px) { .card--rail { width: 264px; max-width: none; } }

/* ---------- Stepper de cantidad ---------- */

.stepper {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  padding: 0.2rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-strong);
  background: oklch(1 0 0 / 0.06);
}
.stepper button {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--r-pill);
  color: var(--on-dark);
  transition: background-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.stepper button:hover { background: oklch(1 0 0 / 0.14); }
.stepper button:active { transform: scale(0.9); }
.stepper button[disabled] { opacity: 0.35; cursor: not-allowed; }
.stepper output {
  min-width: 2ch;
  text-align: center;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.stepper svg { width: 16px; height: 16px; }

/* ---------- Buscador ---------- */

.search {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1 1 auto;
  min-width: 0;
}
.search svg {
  position: absolute;
  left: 0.95rem;
  width: 18px;
  height: 18px;
  color: var(--on-dark-low);
  pointer-events: none;
}
.search input {
  width: 100%;
  min-height: 48px;
  padding: 0.6rem 2.6rem 0.6rem 2.85rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-strong);
  background: oklch(1 0 0 / 0.06);
  color: var(--on-dark);
  font-size: var(--step-0);
  transition: border-color var(--t-mid) var(--ease), background-color var(--t-mid) var(--ease);
}
.search input::placeholder { color: var(--on-dark-low); }
.search input:focus {
  outline: none;
  border-color: var(--gold);
  background: oklch(1 0 0 / 0.10);
}
.search input:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
.search__clear {
  position: absolute;
  right: 0.5rem;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--r-pill);
  color: var(--on-dark-mid);
}
.search__clear:hover { background: oklch(1 0 0 / 0.12); }
.search__clear[hidden] { display: none; }
.search__clear svg { position: static; width: 16px; height: 16px; color: currentColor; }

/* ---------- Panel (drawer / bottom sheet) ---------- */

.scrim {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: oklch(0.08 0.03 262 / 0.72);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-mid) var(--ease);
}
.scrim.is-open { opacity: 1; pointer-events: auto; }

.panel {
  position: fixed;
  z-index: var(--z-panel);
  display: flex;
  flex-direction: column;
  background: var(--navy-950);
  color: var(--on-dark);
  box-shadow: var(--shadow-lg);
  visibility: hidden;
  transition:
    transform var(--t-slow) var(--ease),
    visibility 0s linear var(--t-slow);
}
.panel.is-open {
  visibility: visible;
  transition:
    transform var(--t-slow) var(--ease),
    visibility 0s;
}

/* móvil: hoja inferior */
.panel {
  inset: auto 0 0 0;
  max-height: min(92svh, 780px);
  border-radius: var(--r-xl) var(--r-xl) 0 0;
  border-top: 1px solid var(--line-strong);
  transform: translate3d(0, 100%, 0);
}
.panel.is-open { transform: translate3d(0, 0, 0); }

@media (min-width: 900px) {
  .panel {
    inset: 0 0 0 auto;
    width: min(440px, 100%);
    max-height: none;
    border-radius: 0;
    border-top: 0;
    border-left: 1px solid var(--line-strong);
    transform: translate3d(100%, 0, 0);
  }
  .panel.is-open { transform: translate3d(0, 0, 0); }
}

.panel__grip {
  width: 42px;
  height: 4px;
  border-radius: var(--r-pill);
  background: var(--navy-600);
  margin: 0.6rem auto 0;
}
@media (min-width: 900px) { .panel__grip { display: none; } }

.panel__head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
}
.panel__title {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 700;
  flex: 1;
  min-width: 0;
}
.panel__body {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding: 1rem;
}
.panel__foot {
  padding: 0.9rem 1rem calc(0.9rem + var(--safe-b));
  border-top: 1px solid var(--line);
  background: var(--navy-900);
  display: grid;
  gap: 0.6rem;
}

/* ---------- Línea de carrito ---------- */

.line {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
}
.line:last-child { border-bottom: 0; }
.line__media {
  width: 64px;
  aspect-ratio: 1;
  border-radius: var(--r-sm);
  overflow: hidden;
  background: var(--navy-800);
}
.line__media img { width: 100%; height: 100%; object-fit: cover; }
.line__name { font-weight: 600; font-size: var(--step--1); line-height: 1.3; }
.line__variant { font-size: 0.76rem; color: var(--gold); font-weight: 600; }
.line__price { font-size: 0.8rem; color: var(--on-dark-low); font-variant-numeric: tabular-nums; }
.line__right { display: flex; flex-direction: column; align-items: flex-end; gap: 0.4rem; }
.line__total { font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }

/* ---------- Formularios ---------- */

.field { display: grid; gap: 0.35rem; }
.field > label {
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--on-dark-mid);
}
.field .req { color: var(--sunset); }
.field input,
.field textarea,
.field select {
  width: 100%;
  min-height: 48px;
  padding: 0.7rem 0.9rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--line-strong);
  background: oklch(1 0 0 / 0.05);
  color: var(--on-dark);
  transition: border-color var(--t-mid) var(--ease), background-color var(--t-mid) var(--ease);
}
.field textarea { min-height: 84px; resize: vertical; line-height: 1.5; }
.field input::placeholder,
.field textarea::placeholder { color: var(--on-dark-low); }
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--gold);
  background: oklch(1 0 0 / 0.09);
}
.field input:focus-visible,
.field textarea:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
.field .hint { font-size: 0.76rem; color: var(--on-dark-low); }
.field .error {
  display: none;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--danger-soft);
}
.field[data-invalid] input,
.field[data-invalid] textarea { border-color: var(--danger); }
.field[data-invalid] .error { display: block; }

.choice-grid { display: grid; gap: 0.65rem; }
@media (min-width: 480px) { .choice-grid { grid-template-columns: 1fr 1fr; } }

.choice {
  display: grid;
  gap: 0.25rem;
  padding: 1rem;
  text-align: left;
  border-radius: var(--r-md);
  border: 1px solid var(--line-strong);
  background: oklch(1 0 0 / 0.05);
  transition: border-color var(--t-mid) var(--ease), background-color var(--t-mid) var(--ease), transform var(--t-fast) var(--ease);
}
.choice:active { transform: scale(0.985); }
.choice[aria-pressed='true'] {
  border-color: var(--gold);
  background: oklch(0.855 0.150 84 / 0.12);
}
.choice svg { width: 24px; height: 24px; color: var(--gold); }
.choice b { font-size: var(--step-0); font-weight: 700; }
.choice span { font-size: var(--step--1); color: var(--on-dark-low); line-height: 1.4; }

/* Selector de variantes */
.variants { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.variant {
  flex: 0 1 auto;
  display: grid;
  gap: 0.1rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--line-strong);
  background: oklch(1 0 0 / 0.05);
  text-align: left;
  transition: border-color var(--t-mid) var(--ease), background-color var(--t-mid) var(--ease), transform var(--t-fast) var(--ease);
}
.variant:active { transform: scale(0.97); }
.variant b { font-size: var(--step--1); font-weight: 650; }
.variant span { font-size: 0.8rem; font-weight: 700; color: var(--gold); font-variant-numeric: tabular-nums; }
.variant[aria-pressed='true'] {
  border-color: var(--gold);
  background: oklch(0.855 0.150 84 / 0.14);
}

/* ---------- Toast ---------- */

/* Los avisos nunca deben quedar encima del carrito, del dock ni del botón de
   WhatsApp: van centrados abajo y no capturan el puntero. */
.toaster {
  position: fixed;
  left: 50%;
  bottom: calc(var(--dock-h) + var(--safe-b) + 0.75rem);
  translate: -50% 0;
  z-index: var(--z-toast);
  display: grid;
  gap: 0.5rem;
  width: min(420px, calc(100vw - 2rem));
  pointer-events: none;
}
@media (min-width: 900px) { .toaster { bottom: 1.75rem; width: min(440px, 42vw); } }

.toast {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.7rem 0.9rem;
  border-radius: var(--r-md);
  border: 1px solid var(--line-strong);
  background: oklch(0.25 0.064 261 / 0.96);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-lg);
  font-size: var(--step--1);
  font-weight: 600;
  pointer-events: none;
  animation: toast-in var(--t-slow) var(--ease);
}
.toast[data-out] { animation: toast-out var(--t-mid) var(--ease) forwards; }
.toast__dot {
  width: 30px; height: 30px;
  flex: 0 0 auto;
  display: grid; place-items: center;
  border-radius: var(--r-pill);
  background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  color: oklch(0.20 0.05 70);
}
.toast__dot svg { width: 17px; height: 17px; }
.toast--warn .toast__dot { background: linear-gradient(135deg, var(--danger-soft), var(--danger)); color: oklch(0.99 0 0); }

@keyframes toast-in {
  from { opacity: 0; transform: translate3d(0, 12px, 0) scale(0.97); }
  to   { opacity: 1; transform: none; }
}
@keyframes toast-out {
  to { opacity: 0; transform: translate3d(0, 8px, 0) scale(0.98); }
}

/* ---------- Adornos de marca ---------- */

.orn {
  pointer-events: none;
  user-select: none;
  mix-blend-mode: screen;
  opacity: 0.9;
}

.divider-orn {
  display: block;
  width: min(420px, 70%);
  margin: 0 auto;
  mix-blend-mode: screen;
  opacity: 0.85;
}

/* ---------- Estados vacíos ---------- */

.empty {
  display: grid;
  justify-items: center;
  gap: 0.6rem;
  padding: 2.5rem 1rem;
  text-align: center;
  color: var(--on-dark-low);
}
.empty img { width: 92px; opacity: 0.85; mix-blend-mode: screen; }
.empty b { font-family: var(--font-display); font-size: var(--step-2); color: var(--on-dark); }
.empty p { font-size: var(--step--1); max-width: 34ch; }

/* ==========================================================================
   Flechas de los carruseles
   ========================================================================== */

.rail-wrap {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
}

.rail-nav {
  position: absolute;
  top: 50%;
  translate: 0 -50%;
  z-index: var(--z-raised);
  display: none;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-strong);
  background: oklch(0.17 0.055 261 / 0.92);
  backdrop-filter: blur(10px);
  color: var(--on-dark);
  box-shadow: var(--shadow-md);
  transition:
    opacity var(--t-mid) var(--ease),
    background-color var(--t-mid) var(--ease),
    transform var(--t-fast) var(--ease);
}
.rail-nav--prev { left: calc(var(--gutter) * -1 + 2px); }
.rail-nav--next { right: calc(var(--gutter) * -1 + 2px); }
.rail-nav:hover { background: oklch(0.25 0.064 261 / 0.98); }
.rail-nav:active { transform: translate(0, -50%) scale(0.92); }
.rail-nav[disabled] { opacity: 0; pointer-events: none; }

/* Solo con puntero fino y espacio suficiente: en pantalla táctil se desliza. */
@media (min-width: 900px) and (hover: hover) and (pointer: fine) {
  .rail-wrap.has-nav .rail-nav { display: grid; }
}

/* En secciones claras las flechas se invierten. */
.section--light .rail-nav {
  background: oklch(1 0 0 / 0.94);
  border-color: var(--shell-line);
  color: var(--on-light);
}
.section--light .rail-nav:hover { background: oklch(1 0 0); }

/* ==========================================================================
   Ecualizador y cargador
   ========================================================================== */

.eq {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 14px;
}
.eq i {
  width: 3px;
  height: 100%;
  border-radius: 2px;
  background: currentColor;
  transform-origin: bottom;
  animation: eq-bounce 900ms ease-in-out infinite;
}
.eq i:nth-child(2) { animation-delay: 160ms; }
.eq i:nth-child(3) { animation-delay: 320ms; }

@keyframes eq-bounce {
  0%, 100% { transform: scaleY(0.35); }
  50% { transform: scaleY(1); }
}

@media (prefers-reduced-motion: reduce) {
  .eq i { animation: none; transform: scaleY(0.7); }
}

.spinner {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid oklch(1 0 0 / 0.25);
  border-top-color: currentColor;
  animation: spin 720ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Degradado en los bordes del carrusel: deja claro que hay más y evita que
   una tarjeta quede cortada a medias debajo de la flecha. */
.rail-wrap {
  --rail-fade: oklch(0.17 0.055 261);
}
.quick .rail-wrap { --rail-fade: oklch(0.15 0.05 261); }
.gallery .rail-wrap { --rail-fade: oklch(0.13 0.045 262); }
.historia .rail-wrap { --rail-fade: oklch(0.15 0.05 262); }
.section--light .rail-wrap { --rail-fade: oklch(0.968 0.006 250); }

.rail-wrap::before,
.rail-wrap::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 10px;
  width: 76px;
  z-index: 1;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-mid) var(--ease);
}
.rail-wrap::before {
  left: calc(var(--gutter) * -1);
  background: linear-gradient(90deg, var(--rail-fade) 22%, transparent);
}
.rail-wrap::after {
  right: calc(var(--gutter) * -1);
  background: linear-gradient(270deg, var(--rail-fade) 22%, transparent);
}

@media (min-width: 900px) and (hover: hover) and (pointer: fine) {
  .rail-wrap.can-prev::before,
  .rail-wrap.can-next::after { opacity: 1; }
}