:root {
  --dow-red: #e30613;
  --dow-red-deep: #9a0410;
  --dow-black: #0a0a0a;
  --dow-ink: #111111;
  --dow-white: #f7f5f2;
  --dow-muted: rgba(247, 245, 242, 0.62);
  --font-display: "Bebas Neue", sans-serif;
  --font-body: "Outfit", sans-serif;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --panel-duration: 700ms;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--dow-white);
  background: var(--dow-black);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.gateway {
  position: relative;
  height: 100dvh;
  width: 100%;
  overflow: hidden;
}

/* ——— Brand ——— */
.brand {
  position: absolute;
  top: clamp(1.25rem, 3vw, 2rem);
  left: 50%;
  transform: translateX(-50%);
  z-index: 30;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
  pointer-events: none;
  animation: brand-in 1s var(--ease-out) both;
}

.brand__link {
  pointer-events: auto;
  display: block;
  line-height: 0;
  filter: drop-shadow(0 8px 28px rgba(0, 0, 0, 0.45));
  transition: transform 400ms var(--ease-out);
}

.brand__link:hover {
  transform: scale(1.04);
}

.brand__logo {
  display: block;
  width: clamp(148px, 22vw, 220px);
  height: auto;
}

.brand__tagline {
  font-size: clamp(0.7rem, 1.2vw, 0.85rem);
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dow-muted);
  text-align: center;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.7);
  transition: opacity 400ms ease, transform 400ms var(--ease-out);
}

.panels[data-active="publicidad"] .brand__tagline,
.panels[data-active="tecnologia"] .brand__tagline {
  opacity: 0;
  transform: translateY(-6px);
}

/* ——— Panels ——— */
.panels {
  display: flex;
  height: 100%;
  width: 100%;
}

.panel {
  position: relative;
  flex: 1 1 50%;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  overflow: hidden;
  min-width: 0;
  cursor: pointer;
  transition: flex-grow var(--panel-duration) var(--ease-out);
  isolation: isolate;
}

.panels[data-active="publicidad"] .panel--publicidad,
.panels[data-active="tecnologia"] .panel--tecnologia {
  flex-grow: 2.35;
}

.panels[data-active="publicidad"] .panel--tecnologia,
.panels[data-active="tecnologia"] .panel--publicidad {
  flex-grow: 0.72;
}

.panel__atmosphere {
  position: absolute;
  inset: 0;
  z-index: 0;
  transform: scale(1.08);
  transition:
    transform var(--panel-duration) var(--ease-out),
    filter var(--panel-duration) var(--ease-out);
}

.panel--publicidad .panel__atmosphere {
  background:
    radial-gradient(ellipse 80% 60% at 20% 80%, rgba(227, 6, 19, 0.55), transparent 55%),
    radial-gradient(ellipse 50% 40% at 90% 20%, rgba(255, 80, 60, 0.25), transparent 50%),
    linear-gradient(160deg, #2a0508 0%, #6e0810 38%, #e30613 72%, #ff4a3a 100%);
}

.panel--publicidad .panel__atmosphere::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      -18deg,
      transparent 0,
      transparent 46px,
      rgba(255, 255, 255, 0.03) 46px,
      rgba(255, 255, 255, 0.03) 47px
    );
  opacity: 0.7;
  mix-blend-mode: soft-light;
}

.panel--publicidad .panel__atmosphere::after {
  content: "";
  position: absolute;
  inset: -10%;
  background:
    radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.12), transparent 28%),
    radial-gradient(circle at 70% 70%, rgba(0, 0, 0, 0.35), transparent 40%);
  animation: glow-drift 12s ease-in-out infinite alternate;
}

.panel--tecnologia .panel__atmosphere {
  background:
    radial-gradient(ellipse 70% 50% at 80% 75%, rgba(40, 90, 120, 0.35), transparent 55%),
    radial-gradient(ellipse 40% 35% at 15% 25%, rgba(227, 6, 19, 0.12), transparent 45%),
    linear-gradient(200deg, #000000 0%, #0d1116 45%, #151c24 78%, #1a2430 100%);
}

.panel--tecnologia .panel__atmosphere::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 70% at 60% 50%, black 20%, transparent 75%);
  opacity: 0.55;
}

.panel--tecnologia .panel__atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, transparent 40%, rgba(120, 180, 220, 0.06) 50%, transparent 60%);
  background-size: 200% 100%;
  animation: scan-sweep 9s linear infinite;
}

.panel__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: rgba(0, 0, 0, 0.28);
  transition: background var(--panel-duration) var(--ease-out);
}

.panel:hover .panel__veil,
.panels[data-active="publicidad"] .panel--publicidad .panel__veil,
.panels[data-active="tecnologia"] .panel--tecnologia .panel__veil {
  background: rgba(0, 0, 0, 0.08);
}

.panels[data-active="publicidad"] .panel--tecnologia .panel__veil,
.panels[data-active="tecnologia"] .panel--publicidad .panel__veil {
  background: rgba(0, 0, 0, 0.55);
}

.panel:hover .panel__atmosphere,
.panels[data-active="publicidad"] .panel--publicidad .panel__atmosphere,
.panels[data-active="tecnologia"] .panel--tecnologia .panel__atmosphere {
  transform: scale(1);
  filter: saturate(1.1) brightness(1.05);
}

.panels[data-active="publicidad"] .panel--tecnologia .panel__atmosphere,
.panels[data-active="tecnologia"] .panel--publicidad .panel__atmosphere {
  filter: saturate(0.55) brightness(0.65);
}

/* ——— Content ——— */
.panel__content {
  position: relative;
  z-index: 2;
  width: min(100%, 28rem);
  padding: clamp(2rem, 6vw, 4.5rem) clamp(1.25rem, 4vw, 3rem);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.85rem;
  transition: transform var(--panel-duration) var(--ease-out);
}

.panel--tecnologia .panel__content {
  align-items: flex-end;
  text-align: right;
}

.panel__label {
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 9vw, 7.5rem);
  line-height: 0.9;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition:
    transform var(--panel-duration) var(--ease-out),
    letter-spacing var(--panel-duration) var(--ease-out),
    opacity 400ms ease;
}

.panel__hint {
  max-width: 16rem;
  font-size: clamp(0.9rem, 1.5vw, 1.05rem);
  font-weight: 300;
  line-height: 1.45;
  color: var(--dow-muted);
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 450ms var(--ease-out) 80ms,
    transform 450ms var(--ease-out) 80ms;
}

.panel--tecnologia .panel__hint {
  margin-left: auto;
}

.panel__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-top: 0.35rem;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 450ms var(--ease-out) 140ms,
    transform 450ms var(--ease-out) 140ms;
}

.panel__cta::after {
  content: "";
  display: block;
  width: 2rem;
  height: 1px;
  background: currentColor;
  transition: width 400ms var(--ease-out);
}

.panel--tecnologia .panel__cta {
  flex-direction: row-reverse;
}

.panel:hover .panel__hint,
.panel:hover .panel__cta,
.panels[data-active="publicidad"] .panel--publicidad .panel__hint,
.panels[data-active="publicidad"] .panel--publicidad .panel__cta,
.panels[data-active="tecnologia"] .panel--tecnologia .panel__hint,
.panels[data-active="tecnologia"] .panel--tecnologia .panel__cta {
  opacity: 1;
  transform: translateY(0);
}

.panel:hover .panel__cta::after,
.panels[data-active="publicidad"] .panel--publicidad .panel__cta::after,
.panels[data-active="tecnologia"] .panel--tecnologia .panel__cta::after {
  width: 3.25rem;
}

.panel:hover .panel__label,
.panels[data-active="publicidad"] .panel--publicidad .panel__label,
.panels[data-active="tecnologia"] .panel--tecnologia .panel__label {
  letter-spacing: 0.05em;
  transform: translateY(-4px);
}

.panels[data-active="publicidad"] .panel--tecnologia .panel__label,
.panels[data-active="tecnologia"] .panel--publicidad .panel__label {
  opacity: 0.35;
}

/* Divider line between panels */
.panels::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(255, 255, 255, 0.18) 30%,
    rgba(255, 255, 255, 0.18) 70%,
    transparent 100%
  );
  z-index: 20;
  pointer-events: none;
  transition: opacity 400ms ease, left var(--panel-duration) var(--ease-out);
}

.panels[data-active="publicidad"]::before {
  left: calc(100% * 2.35 / 3.07);
  opacity: 0.35;
}

.panels[data-active="tecnologia"]::before {
  left: calc(100% * 0.72 / 3.07);
  opacity: 0.35;
}

.panels {
  position: relative;
}

/* ——— Animations ——— */
@keyframes brand-in {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@keyframes glow-drift {
  from {
    transform: translate(-2%, -1%) scale(1);
  }
  to {
    transform: translate(3%, 2%) scale(1.05);
  }
}

@keyframes scan-sweep {
  from {
    background-position: 120% 0;
  }
  to {
    background-position: -120% 0;
  }
}

.panel {
  animation: panel-in 1.1s var(--ease-out) both;
}

.panel--publicidad {
  animation-delay: 120ms;
}

.panel--tecnologia {
  animation-delay: 220ms;
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: scale(1.04);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ——— Branch stub pages ——— */
.branch-page {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 2rem;
  text-align: center;
  background: var(--dow-black);
}

.branch-page--publicidad {
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(227, 6, 19, 0.35), transparent 60%),
    var(--dow-black);
}

.branch-page--tecnologia {
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(40, 90, 120, 0.28), transparent 60%),
    var(--dow-black);
}

.branch-page__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  max-width: 28rem;
  animation: brand-in 0.9s var(--ease-out) both;
}

.branch-page__inner .brand__logo {
  width: 110px;
}

.branch-page h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 5.5rem);
  letter-spacing: 0.04em;
  line-height: 0.95;
}

.branch-page p {
  color: var(--dow-muted);
  font-weight: 300;
  line-height: 1.5;
}

.branch-page__back {
  margin-top: 0.75rem;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border-bottom: 1px solid rgba(247, 245, 242, 0.35);
  padding-bottom: 0.2rem;
  transition: border-color 250ms ease, color 250ms ease;
}

.branch-page__back:hover {
  color: var(--dow-white);
  border-color: var(--dow-white);
}

/* ——— Reduced motion ——— */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0.01ms !important;
  }
}

/* ——— Mobile: stacked full-height halves ——— */
@media (max-width: 768px) {
  body {
    overflow: auto;
  }

  .gateway {
    height: auto;
    min-height: 100dvh;
  }

  .brand {
    top: 1rem;
  }

  .brand__tagline {
    font-size: 0.65rem;
    letter-spacing: 0.14em;
  }

  .panels {
    flex-direction: column;
    min-height: 100dvh;
  }

  .panels::before {
    top: 50%;
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    height: 1px;
    background: linear-gradient(
      to right,
      transparent 0%,
      rgba(255, 255, 255, 0.18) 30%,
      rgba(255, 255, 255, 0.18) 70%,
      transparent 100%
    );
  }

  .panel {
    flex: 1 1 50%;
    min-height: 50dvh;
    align-items: center;
  }

  .panels[data-active="publicidad"] .panel--publicidad,
  .panels[data-active="tecnologia"] .panel--tecnologia {
    flex-grow: 1.55;
  }

  .panels[data-active="publicidad"] .panel--tecnologia,
  .panels[data-active="tecnologia"] .panel--publicidad {
    flex-grow: 0.75;
  }

  .panels[data-active="publicidad"]::before {
    top: calc(100% * 1.55 / 2.3);
    left: 0;
  }

  .panels[data-active="tecnologia"]::before {
    top: calc(100% * 0.75 / 2.3);
    left: 0;
  }

  .panel__content,
  .panel--tecnologia .panel__content {
    align-items: center;
    text-align: center;
    padding-block: 3.5rem 2.5rem;
  }

  .panel--tecnologia .panel__hint {
    margin-left: 0;
  }

  .panel__label {
    font-size: clamp(3rem, 14vw, 4.5rem);
  }

  .panel__hint {
    max-width: 18rem;
    opacity: 0.85;
    transform: none;
  }

  /* CTA siempre visible y marcado en móvil */
  .panel__cta {
    opacity: 1;
    transform: none;
    margin-top: 0.75rem;
    padding: 0.7rem 1.35rem;
    border: 1px solid rgba(247, 245, 242, 0.85);
    background: rgba(0, 0, 0, 0.35);
    letter-spacing: 0.18em;
    backdrop-filter: blur(6px);
  }

  .panel__cta::after {
    display: none;
  }

  .panel--publicidad .panel__cta {
    border-color: rgba(247, 245, 242, 0.95);
    background: rgba(227, 6, 19, 0.35);
  }

  .panel--tecnologia .panel__cta {
    border-color: rgba(247, 245, 242, 0.75);
    background: rgba(255, 255, 255, 0.08);
  }

  .panels[data-active="publicidad"] .panel--publicidad .panel__cta,
  .panels[data-active="tecnologia"] .panel--tecnologia .panel__cta {
    background: rgba(247, 245, 242, 0.95);
    color: var(--dow-black);
    border-color: transparent;
  }
}