html, body {
  height: 100%;
  overflow: hidden;
  margin: 0;
  font-family: var(--fonte-corpo);
  background: var(--cor-texto);
}

.porta-dupla {
  position: relative;
  display: flex;
  width: 100%;
  height: 100vh;
  height: 100svh;
}

.porta-dupla-marca {
  position: absolute;
  top: clamp(1.25rem, 3vw, 2rem);
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  pointer-events: none;
}
.porta-dupla-logo {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 2px 10px rgba(0,0,0,.35));
}
.porta-dupla-logo img { width: 100%; height: 100%; object-fit: contain; }
.porta-dupla-nome {
  font-family: var(--fonte-titulo);
  font-weight: 600;
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: #fff;
  text-shadow: 0 2px 10px rgba(0,0,0,.35);
  letter-spacing: .02em;
}
.porta-dupla-evento {
  font-family: var(--fonte-corpo);
  font-weight: 600;
  font-size: .7rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #fff;
  opacity: .8;
  text-shadow: 0 2px 10px rgba(0,0,0,.35);
  margin-top: -.15rem;
}

.porta-dupla-voltar {
  position: absolute;
  top: clamp(1.25rem, 3vw, 2rem);
  left: clamp(1.25rem, 3vw, 2rem);
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  color: #fff;
  text-decoration: none;
  font-family: var(--fonte-corpo);
  font-weight: 500;
  font-size: .9rem;
  letter-spacing: .03em;
  text-shadow: 0 2px 10px rgba(0,0,0,.35);
}
.porta-dupla-voltar:hover { opacity: .8; }

.porta-dupla-linha {
  position: absolute;
  top: 0;
  left: 50%;
  width: 1px;
  height: 100%;
  background: rgba(255,255,255,.4);
  z-index: 2;
  pointer-events: none;
}

.porta-dupla-lado {
  position: relative;
  width: 50%;
  height: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.porta-dupla-foto {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: grayscale(.85);
  animation: portaDuplaFotoZoom 18s ease-in-out infinite alternate;
}
@keyframes portaDuplaFotoZoom {
  from { transform: scale(1);    }
  to   { transform: scale(1.09); }
}

.porta-dupla-mascara {
  position: absolute;
  inset: 0;
  background: #751576;
  filter: saturate(1.45) brightness(.78);
  mix-blend-mode: multiply;
  opacity: .68;
}

.porta-dupla-conteudo {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #fff;
  padding: 0 1.5rem;
}
.porta-dupla-kicker {
  display: inline-block;
  font-family: var(--fonte-corpo);
  font-weight: 600;
  font-size: .8rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  opacity: .85;
  margin-bottom: .75rem;
}
.porta-dupla-titulo {
  font-family: var(--fonte-titulo);
  font-weight: 600;
  font-style: italic;
  font-size: clamp(2.75rem, 6vw, 5rem);
  line-height: 1;
  margin: 0 0 .75rem;
}
.porta-dupla-subtitulo {
  font-family: var(--fonte-corpo);
  font-size: clamp(.95rem, 1.4vw, 1.1rem);
  opacity: .9;
  margin: 0 0 2rem;
}

.porta-dupla-botao {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .9rem 2.1rem;
  border: 1.5px solid rgba(255,255,255,.3);
  border-radius: 999px;
  background: rgba(0, 0, 0, .32);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 8px 24px rgba(0,0,0,.25), inset 0 1px 0 rgba(255,255,255,.18);
  color: #fff;
  font-family: var(--fonte-corpo);
  font-weight: 500;
  font-size: .95rem;
  letter-spacing: .03em;
  transition: transform .3s ease, background .3s ease, box-shadow .3s ease;
}
.porta-dupla-anel {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  border: 1.5px solid #fff;
  animation: portaDuplaPulso 2.4s ease-out infinite;
}

@keyframes portaDuplaPulso {
  0%   { transform: scale(1);    opacity: .6; }
  100% { transform: scale(1.35); opacity: 0;  }
}

.porta-dupla-botao:hover {
  transform: scale(1.08);
  background: rgba(0, 0, 0, .42);
  box-shadow: 0 10px 30px rgba(0,0,0,.3), inset 0 1px 0 rgba(255,255,255,.22);
}

.porta-dupla-lado:focus-visible {
  outline: 2px solid #fff;
  outline-offset: -4px;
}

@media (prefers-reduced-motion: reduce) {
  .porta-dupla-foto { animation: none; }
  .porta-dupla-botao { transition: none; }
  .porta-dupla-botao:hover { transform: none; }
  .porta-dupla-anel { animation: none; display: none; }
}

@media (max-width: 768px) {
  .porta-dupla { flex-direction: column; }
  .porta-dupla-lado { width: 100%; height: 50%; }
  .porta-dupla-linha { top: 50%; left: 0; width: 100%; height: 1px; }
  .porta-dupla-titulo { font-size: clamp(2rem, 9vw, 3rem); }
}