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

html,
body {
  height: 100%;
}

.sky {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  background: linear-gradient(180deg, #4a90e2 0%, #87ceeb 45%, skyblue 75%, #cfeeff 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.greeting {
  position: relative;
  z-index: 2;
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: clamp(2rem, 6vw, 4.5rem);
  font-weight: 700;
  color: #ffffff;
  text-shadow: 0 2px 12px rgba(0, 30, 80, 0.35);
  letter-spacing: 0.02em;
}

#sun {
  position: absolute;
  top: 6%;
  right: 8%;
  width: clamp(90px, 16vw, 180px);
  height: clamp(90px, 16vw, 180px);
  z-index: 1;
}

.sun-disc {
  fill: #ffd54f;
}

.sun-rays .ray {
  stroke: #ffd54f;
  stroke-width: 6;
  stroke-linecap: round;
}

.sun-face .eye {
  fill: #6d4c1f;
}

.sun-face .smile {
  fill: none;
  stroke: #6d4c1f;
  stroke-width: 5;
  stroke-linecap: round;
}

.cloud {
  position: absolute;
  background: #ffffff;
  border-radius: 50px;
  box-shadow: -20px 10px 0 -5px rgba(255, 255, 255, 0.9), 25px 5px 0 -8px rgba(255, 255, 255, 0.85);
  opacity: 0.95;
  animation: drift 40s linear infinite;
  z-index: 1;
}

.cloud::before,
.cloud::after {
  content: "";
  position: absolute;
  background: inherit;
  border-radius: 50%;
}

.cloud-1 {
  top: 18%;
  left: -20%;
  width: 160px;
  height: 55px;
  animation-duration: 38s;
  animation-delay: 0s;
}

.cloud-2 {
  top: 38%;
  left: -30%;
  width: 220px;
  height: 70px;
  animation-duration: 52s;
  animation-delay: -12s;
}

.cloud-3 {
  top: 62%;
  left: -25%;
  width: 130px;
  height: 45px;
  animation-duration: 33s;
  animation-delay: -20s;
}

@keyframes drift {
  0% {
    transform: translateX(-15vw);
  }
  100% {
    transform: translateX(115vw);
  }
}