body.no-scroll {
  overflow: hidden;
  height: 100vh;
}

.envelope-splash {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  justify-content: center;
  background-color: #ede1d3;
}

.envelope-frame {
  position: relative;
  width: 100%;
  max-width: 430px;
  height: 100%;
  display: flex;
  gap: 1px;
  overflow: hidden;
  background-color: #fff9f1;
}

.envelope-half {
  width: calc(50% - 0.5px);
  height: 100%;
  transition: transform 1.1s cubic-bezier(0.65, 0, 0.35, 1), opacity 1.1s ease;
}

.envelope-half img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.envelope-left {
  transform-origin: left center;
}

.envelope-right {
  transform-origin: right center;
}

.wax-seal-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 140px;
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
  z-index: 2;
  transition: transform 0.35s ease, opacity 0.5s ease;
}

.wax-seal-btn img {
  width: 100%;
  display: block;
}

.wax-seal-btn:hover {
  transform: translate(-50%, -50%) scale(1.08);
}

.wax-seal-btn:active {
  transform: translate(-50%, -50%) scale(0.96);
}

/* Estado abierto */
.envelope-splash.opening .envelope-left {
  transform: translateX(-100%);
  opacity: 0.3;
}

.envelope-splash.opening .envelope-right {
  transform: translateX(100%);
  opacity: 0.3;
}

.envelope-splash.opening .wax-seal-btn {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.4);
}

.envelope-splash.hidden {
  display: none;
}