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

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
}

.screen {
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.responsive-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
}

.whatsapp-btn {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #25d366;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.35);
  z-index: 9999;
  text-decoration: none;
  animation: whatsappPulse 1.8s infinite;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.whatsapp-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.42);
}

.whatsapp-btn svg {
  width: 31px;
  height: 31px;
  fill: #fff;
  position: relative;
  z-index: 2;
}

.whatsapp-tooltip {
  position: absolute;
  right: 78px;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(17, 17, 17, 0.92);
  color: #fff;
  padding: 10px 14px;
  border-radius: 999px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
  line-height: 1;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
}

.whatsapp-tooltip::after {
  content: "";
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
  border-width: 6px 0 6px 6px;
  border-style: solid;
  border-color: transparent transparent transparent rgba(17, 17, 17, 0.92);
}

.whatsapp-btn:hover .whatsapp-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(-2px);
}

@keyframes whatsappPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.55), 0 10px 26px rgba(0, 0, 0, 0.35);
  }
  70% {
    box-shadow: 0 0 0 16px rgba(37, 211, 102, 0), 0 10px 26px rgba(0, 0, 0, 0.35);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0), 0 10px 26px rgba(0, 0, 0, 0.35);
  }
}

@media (max-width: 600px) {
  .whatsapp-btn {
    width: 58px;
    height: 58px;
    right: 14px;
    bottom: 14px;
  }

  .whatsapp-btn svg {
    width: 28px;
    height: 28px;
  }

  .whatsapp-tooltip {
    display: none;
  }
}

@supports (-webkit-touch-callout: none) {
  html,
  body,
  .screen {
    height: -webkit-fill-available;
  }
}