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

body {
  min-height: 100vh;
  overflow: hidden;
}

.time-toggle {
  display: none;
}

.world {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* Sky */
.sky {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg,
    #87CEEB 0%,
    #98D8E8 30%,
    #B0E0E6 60%,
    #F0E68C 85%,
    #FFD700 100%
  );
  transition: background 1.5s ease;
}

.time-toggle:checked ~ .world .sky {
  background: linear-gradient(180deg,
    #0a0a20 0%,
    #1a1a40 30%,
    #2d2d60 60%,
    #3d3d80 85%,
    #4a4a90 100%
  );
}

/* Sun */
.sun {
  position: absolute;
  top: 10%;
  right: 20%;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, #fff8dc, #ffd700);
  border-radius: 50%;
  box-shadow:
    0 0 60px #ffd700,
    0 0 100px #ffa500;
  transition: all 1.5s ease;
}

.time-toggle:checked ~ .world .sun {
  transform: translateY(120vh);
  opacity: 0;
}

/* Moon */
.moon {
  position: absolute;
  top: 10%;
  right: 20%;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle at 30% 30%, #fffacd, #f0e68c);
  border-radius: 50%;
  box-shadow: 0 0 40px rgba(255, 250, 205, 0.5);
  transform: translateY(-120vh);
  opacity: 0;
  transition: all 1.5s ease;
}

.time-toggle:checked ~ .world .moon {
  transform: translateY(0);
  opacity: 1;
}

.crater {
  position: absolute;
  background: rgba(200, 190, 150, 0.5);
  border-radius: 50%;
}

.crater-1 { top: 20%; left: 30%; width: 15px; height: 15px; }
.crater-2 { top: 50%; left: 50%; width: 10px; height: 10px; }
.crater-3 { top: 35%; left: 60%; width: 8px; height: 8px; }

/* Stars */
.stars {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.5s ease;
}

.time-toggle:checked ~ .world .stars {
  opacity: 1;
}

.star {
  position: absolute;
  width: 3px;
  height: 3px;
  background: #fff;
  border-radius: 50%;
  animation: twinkle 2s ease-in-out infinite;
}

.star:nth-child(1) { top: 10%; left: 10%; animation-delay: 0s; }
.star:nth-child(2) { top: 15%; left: 30%; animation-delay: 0.3s; }
.star:nth-child(3) { top: 8%; left: 50%; animation-delay: 0.6s; }
.star:nth-child(4) { top: 20%; left: 70%; animation-delay: 0.9s; }
.star:nth-child(5) { top: 5%; left: 85%; animation-delay: 1.2s; }
.star:nth-child(6) { top: 25%; left: 15%; animation-delay: 1.5s; }
.star:nth-child(7) { top: 12%; left: 45%; animation-delay: 1.8s; }
.star:nth-child(8) { top: 18%; left: 60%; animation-delay: 0.4s; }

@keyframes twinkle {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* Clouds */
.cloud {
  position: absolute;
  background: #fff;
  border-radius: 50px;
  opacity: 0.9;
  transition: opacity 1.5s ease, background 1.5s ease;
}

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

.cloud-1 {
  top: 15%;
  left: 10%;
  width: 100px;
  height: 40px;
  animation: float-cloud 20s ease-in-out infinite;
}

.cloud-1::before { width: 50px; height: 50px; top: -20px; left: 15px; }
.cloud-1::after { width: 40px; height: 40px; top: -15px; left: 50px; }

.cloud-2 {
  top: 20%;
  left: 60%;
  width: 80px;
  height: 35px;
  animation: float-cloud 25s ease-in-out infinite reverse;
}

.cloud-2::before { width: 45px; height: 45px; top: -20px; left: 10px; }
.cloud-2::after { width: 35px; height: 35px; top: -12px; left: 40px; }

.cloud-3 {
  top: 25%;
  left: 35%;
  width: 120px;
  height: 45px;
  animation: float-cloud 30s ease-in-out infinite;
}

.cloud-3::before { width: 60px; height: 60px; top: -25px; left: 20px; }
.cloud-3::after { width: 50px; height: 50px; top: -20px; left: 60px; }

.time-toggle:checked ~ .world .cloud {
  background: #3a3a5a;
  opacity: 0.4;
}

@keyframes float-cloud {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(30px); }
}

/* Mountains */
.mountains {
  position: absolute;
  bottom: 30%;
  left: 0;
  width: 100%;
  height: 30%;
}

.mountain {
  position: absolute;
  bottom: 0;
  clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
  transition: background 1.5s ease;
}

.mountain-1 {
  left: -5%;
  width: 40%;
  height: 100%;
  background: linear-gradient(180deg, #6b8e6b, #4a6b4a);
}

.mountain-2 {
  left: 25%;
  width: 50%;
  height: 120%;
  background: linear-gradient(180deg, #5a7d5a, #3a5a3a);
}

.mountain-3 {
  right: -5%;
  width: 45%;
  height: 90%;
  background: linear-gradient(180deg, #7a9e7a, #5a7e5a);
}

.time-toggle:checked ~ .world .mountain-1 {
  background: linear-gradient(180deg, #2a3a4a, #1a2a3a);
}

.time-toggle:checked ~ .world .mountain-2 {
  background: linear-gradient(180deg, #1f2f3f, #0f1f2f);
}

.time-toggle:checked ~ .world .mountain-3 {
  background: linear-gradient(180deg, #2f3f4f, #1f2f3f);
}

/* Hills */
.hills {
  position: absolute;
  bottom: 20%;
  left: 0;
  width: 100%;
  height: 20%;
}

.hill {
  position: absolute;
  bottom: 0;
  border-radius: 100% 100% 0 0;
  transition: background 1.5s ease;
}

.hill-1 {
  left: -10%;
  width: 60%;
  height: 100%;
  background: linear-gradient(180deg, #8fbc8f, #6b8e6b);
}

.hill-2 {
  right: -10%;
  width: 55%;
  height: 80%;
  background: linear-gradient(180deg, #98d098, #7ab87a);
}

.time-toggle:checked ~ .world .hill-1 {
  background: linear-gradient(180deg, #2a4a3a, #1a3a2a);
}

.time-toggle:checked ~ .world .hill-2 {
  background: linear-gradient(180deg, #3a5a4a, #2a4a3a);
}

/* Forest */
.forest {
  position: absolute;
  bottom: 20%;
  left: 0;
  width: 100%;
  height: 25%;
}

.tree {
  position: absolute;
  bottom: 0;
}

.trunk {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  background: #5a3d2b;
  border-radius: 3px;
  transition: background 1.5s ease;
}

.foliage {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 50% 50% 45% 45%;
  transition: background 1.5s ease;
}

.tree-1 { left: 5%; }
.tree-1 .trunk { width: 10px; height: 40px; }
.tree-1 .foliage { bottom: 30px; width: 50px; height: 60px; background: #2d6b2d; }

.tree-2 { left: 15%; }
.tree-2 .trunk { width: 8px; height: 30px; }
.tree-2 .foliage { bottom: 22px; width: 40px; height: 50px; background: #3d8b3d; }

.tree-3 { left: 75%; }
.tree-3 .trunk { width: 12px; height: 50px; }
.tree-3 .foliage { bottom: 38px; width: 60px; height: 70px; background: #2d7b2d; }

.tree-4 { left: 85%; }
.tree-4 .trunk { width: 9px; height: 35px; }
.tree-4 .foliage { bottom: 27px; width: 45px; height: 55px; background: #3d9b3d; }

.tree-5 { left: 92%; }
.tree-5 .trunk { width: 7px; height: 25px; }
.tree-5 .foliage { bottom: 18px; width: 35px; height: 45px; background: #4dab4d; }

.time-toggle:checked ~ .world .trunk {
  background: #2a1a10;
}

.time-toggle:checked ~ .world .tree-1 .foliage { background: #0d2b0d; }
.time-toggle:checked ~ .world .tree-2 .foliage { background: #1d3b1d; }
.time-toggle:checked ~ .world .tree-3 .foliage { background: #0d3b0d; }
.time-toggle:checked ~ .world .tree-4 .foliage { background: #1d4b1d; }
.time-toggle:checked ~ .world .tree-5 .foliage { background: #2d5b2d; }

/* House */
.house {
  position: absolute;
  bottom: 18%;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 100px;
}

.roof {
  position: absolute;
  top: 0;
  left: -15px;
  width: 150px;
  height: 50px;
  background: linear-gradient(135deg, #8b4513, #a0522d);
  clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
  transition: background 1.5s ease;
}

.time-toggle:checked ~ .world .roof {
  background: linear-gradient(135deg, #3a2010, #4a3020);
}

.walls {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 120px;
  height: 55px;
  background: #f5deb3;
  display: flex;
  align-items: center;
  justify-content: space-around;
  transition: background 1.5s ease;
}

.time-toggle:checked ~ .world .walls {
  background: #3a3a4a;
}

.window {
  width: 25px;
  height: 30px;
  background: #87ceeb;
  border: 3px solid #5a3d2b;
  position: relative;
  transition: background 1.5s ease, border-color 1.5s ease;
}

.time-toggle:checked ~ .world .window {
  background: #1a1a2a;
  border-color: #2a1a10;
}

.light {
  position: absolute;
  inset: 0;
  background: #ffd700;
  opacity: 0;
  transition: opacity 1.5s ease;
}

.time-toggle:checked ~ .world .light {
  opacity: 1;
  animation: flicker 3s ease-in-out infinite;
}

@keyframes flicker {
  0%, 100% { opacity: 0.9; }
  50% { opacity: 1; }
  75% { opacity: 0.85; }
}

.door {
  width: 25px;
  height: 40px;
  background: #5a3d2b;
  border-radius: 3px 3px 0 0;
  transition: background 1.5s ease;
}

.time-toggle:checked ~ .world .door {
  background: #2a1a10;
}

.chimney {
  position: absolute;
  top: 10px;
  right: 25px;
  width: 20px;
  height: 30px;
  background: #8b4513;
  transition: background 1.5s ease;
}

.time-toggle:checked ~ .world .chimney {
  background: #3a2010;
}

.smoke {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
}

.puff {
  position: absolute;
  width: 15px;
  height: 15px;
  background: rgba(200, 200, 200, 0.6);
  border-radius: 50%;
  animation: rise 3s ease-out infinite;
}

.puff-1 { animation-delay: 0s; }
.puff-2 { animation-delay: 1s; }
.puff-3 { animation-delay: 2s; }

@keyframes rise {
  0% { transform: translateY(0) scale(1); opacity: 0.6; }
  100% { transform: translateY(-50px) scale(2); opacity: 0; }
}

/* Ground */
.ground {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 20%;
}

.grass {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, #7ccd7c, #5aad5a);
  transition: background 1.5s ease;
}

.time-toggle:checked ~ .world .grass {
  background: linear-gradient(180deg, #1a3a1a, #0a2a0a);
}

.path {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 60%;
  background: linear-gradient(180deg, #c4a76c, #a08050);
  clip-path: polygon(30% 0%, 70% 0%, 100% 100%, 0% 100%);
  transition: background 1.5s ease;
}

.time-toggle:checked ~ .world .path {
  background: linear-gradient(180deg, #4a3a2a, #3a2a1a);
}

/* Toggle button */
.toggle-button {
  position: absolute;
  top: 20px;
  left: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 30px;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  transition: background 0.3s ease;
  z-index: 100;
}

.toggle-button:hover {
  background: rgba(255, 255, 255, 1);
}

.toggle-icon {
  font-size: 1.5rem;
  transition: transform 0.5s ease, opacity 0.3s ease;
}

.night-icon {
  position: absolute;
  left: 20px;
  opacity: 0;
  transform: rotate(-90deg);
}

.time-toggle:checked ~ .world .day-icon {
  opacity: 0;
  transform: rotate(90deg);
}

.time-toggle:checked ~ .world .night-icon {
  opacity: 1;
  transform: rotate(0);
}

.toggle-text {
  font-family: 'Segoe UI', sans-serif;
  font-size: 0.9rem;
  color: #333;
  margin-left: 25px;
}

/* Story text */
.story {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  max-width: 600px;
  padding: 20px 30px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  transition: background 0.5s ease;
}

.time-toggle:checked ~ .world .story {
  background: rgba(30, 30, 50, 0.9);
}

.story p {
  font-family: 'Georgia', serif;
  font-size: 1rem;
  line-height: 1.6;
  color: #333;
  transition: color 0.5s ease;
}

.time-toggle:checked ~ .world .story p {
  color: #e8e8e8;
}

.day-text {
  display: block;
}

.night-text {
  display: none;
}

.time-toggle:checked ~ .world .day-text {
  display: none;
}

.time-toggle:checked ~ .world .night-text {
  display: block;
}

/* Responsive */
@media (max-width: 768px) {
  .sun, .moon {
    width: 60px;
    height: 60px;
    top: 5%;
    right: 10%;
  }

  .moon {
    width: 50px;
    height: 50px;
  }

  .house {
    width: 80px;
    height: 70px;
  }

  .roof {
    width: 110px;
    height: 35px;
    left: -15px;
  }

  .walls {
    width: 80px;
    height: 40px;
  }

  .window {
    width: 18px;
    height: 22px;
  }

  .door {
    width: 18px;
    height: 30px;
  }

  .story {
    max-width: 90%;
    padding: 15px 20px;
    bottom: 10px;
  }

  .story p {
    font-size: 0.9rem;
  }

  .toggle-button {
    padding: 8px 15px;
  }

  .toggle-text {
    display: none;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .star, .cloud, .puff {
    animation: none;
  }

  .light {
    animation: none;
  }
}