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

body {
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  position: relative;
}


body::after {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  background-image: url('assets/images/drop.png');
  background-size: cover;
  background-position: center;
  mix-blend-mode: screen;
  filter: blur(8px) grayscale(100%);
  opacity: 0.3;
}


.col {
  flex: 1;
  min-width: 0;
  cursor: pointer;
  transition: flex 0.6s cubic-bezier(0.77, 0, 0.175, 1);
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.col.active {
  flex: 5;
  cursor: default;
}


#c1 { background: #c4c4c4; }
#c2 { background: #4f4f4f; }
#c3 { background: #606060; }
#c4 { background: #878787; }
#c5 { background: #c4c4c4; }


.iframe-wrap {
  position: absolute;
  top: 10%;
  left: 10%;
  width: 80%;
  height: 80%;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease 0.3s;
  border-radius: 50%;
  overflow: hidden;
}

.col.active .iframe-wrap {
  opacity: 1;
  pointer-events: all;
}


iframe {
  width: 80%;
  height: 80%;
  border: 1px solid rgba(255,255,255,0.3);
  box-shadow: 0 0 30px rgba(0,0,0,0.4);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  overflow: hidden;
}


.texts {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 0.6s ease;
  font-family: Arial, sans-serif;
  font-size: 1.1rem;
  color: hotpink;
  letter-spacing: 0.15em;
  pointer-events: none;
  user-select: none;
  text-align: center;
  z-index: 9998;
  white-space: nowrap;
  -webkit-text-stroke: 1px black;
  paint-order: stroke fill;
}

.texts.visible { opacity: 1; }


.topText {
  position: fixed;
  top: 2rem;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 0.6s ease;
  font-family: Arial, sans-serif;
  font-size: 1.1rem;
  color: hotpink;
  letter-spacing: 0.15em;
  pointer-events: none;
  user-select: none;
  text-align: center;
  z-index: 9998;
  white-space: nowrap;
  -webkit-text-stroke: 1px black;
  paint-order: stroke fill;
}

.topText.visible { opacity: 1; }


.semicircle {
  position: fixed;
  bottom: -170px;
  left: 50%;
  transform: translateX(-50%);
  width: 350px;
  height: 300px;
  background: rgba(255,255,255,0.10);
  border-radius: 50%;
  z-index: 9997;
  pointer-events: none;
  backdrop-filter: blur(2px);
  border: 1px solid rgba(255,255,255,0.20);
  transition: opacity 0.6s ease;
}

.semicircle.hidden { opacity: 0; }


.semicircleTop {
  position: fixed;
  top: -170px;
  left: 50%;
  transform: translateX(-50%);
  width: 350px;
  height: 300px;
  background: rgba(255,255,255,0.10);
  border-radius: 50%;
  z-index: 9997;
  pointer-events: none;
  backdrop-filter: blur(2px);
  border: 1px solid rgba(255,255,255,0.20);
  transition: opacity 0.6s ease;
}

.semicircleTop.hidden { opacity: 0; }