/* ================== LOADER ================== */
#loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #fff; /* full-page background */
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;

  transition: opacity 0.8s ease, visibility 0.8s ease;
}

#loader.hidden {
  opacity: 0;
  visibility: hidden;
}

#loader img {
  width: 300px;
  height: 50px;
  animation: pulse 1.5s infinite ease-in-out;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.6; }
}

/* ================== SCROLL REVEAL ================== */
section, main {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

section.visible, main.visible {
  opacity: 1;
  transform: translateY(0);
}