/* Define color variables for easy customization */
:root {
  --transition-duration: 0.5s;
  --text-light: #000000; /* Text color for light mode */
  --text-dark: #ffffff;  /* Text color for dark mode */
}

/* Body layout: vertical stack (toggle row + footer) */
body {
  display: flex;
  justify-content: center; /* center the container vertically */
  align-items: center;     /* center horizontally */
  min-height: 100vh;
  margin: 0;
  font-family: "Times new roman", sans-serif;
  transition: background 0.5s ease-in-out, color 0.5s ease-in-out;
}

/* Ensure all text elements inherit color */
body, body * {
  color: inherit;
  transition: color var(--transition-duration) ease-in-out;
}

/* Make text inherit color from body */
body.light-mode .label {
  color: black;
}

body.dark-mode .label {
  color: white;
}

/* Light mode (sunset gradient) */
body.light-mode {
  background: linear-gradient(135deg, #ffb347, #ff5a5a, #ff3251, #ffcc33);
  color: var(--text-light);
}

/* Dark mode (northern lights gradient) */
body.dark-mode {
  background: linear-gradient(120deg, #0d0d26, #1a1a3f, #00ffaa, #004466);
  color: var(--text-dark);
}

/* Container for AM – Toggle – PM: horizontal row */
.container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: row; /* horizontal row */
  align-items: center;
  gap: 25px;          /* spacing between AM, toggle, PM */
}

/* Labels inherit color from body */
.label {
  font-family: 'Orbitron', sans-serif;
  font-size: 28px;
  font-weight: 700;
  user-select: none;
  color: inherit;     /* switches automatically with light/dark mode */
  transition: color 0.5s ease-in-out;
}

/* Toggle container (Glassmorphism) */
.toggle {
  position: relative;
  width: 350px;
  height: 180px;
  border-radius: 100px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 12px 25px rgba(0,0,0,0.25);
  cursor: pointer;
  transition: background 1s ease-in-out;
}

/* Knob (Sun/Moon) */
.knob {
  position: absolute;
  top: 50%;
  left: 10px;
  transform: translateY(-50%) rotate(0deg);
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #fff8d9, #ffd369);
  box-shadow: 0 0 40px rgba(255, 211, 105, 0.7);
  z-index: 2;
  transition: all 1s cubic-bezier(.77,0,.18,1);
}
.toggle.night .knob {
  left: 180px;
  background: radial-gradient(circle at 30% 30%, #d8dbe8, #a6aed1);
  box-shadow: 0 0 25px rgba(180, 185, 220, 0.6);
  transform: translateY(-50%) rotate(360deg);
}

/* Moon craters */
.knob::before,
.knob::after,
.knob .crater-extra {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.15);
  transition: opacity 1s;
}

/* Big crater */
.knob .crater-extra {
  width: 52px;
  height: 52px;
  top: 40px;
  left: 90px;
}

/* Medium crater */
.knob::before {
  width: 40px;
  height: 40px;
  top: 100px;
  left: 50px;
}

/* Small crater */
.knob::after {
  width: 24px;
  height: 24px;
  top: 35px;
  left: 35px;
}

/* Hide craters in day mode */
.toggle:not(.night) .knob::before,
.toggle:not(.night) .knob::after,
.toggle:not(.night) .knob .crater-extra {
  opacity: 0;
}

/* Scene layers */
.scene {
  position: absolute;
  inset: 0;
  border-radius: 100px;
  z-index: 1;
  transition: opacity 1s ease-in-out;
}

/* Day Scene */
.day-scene {
  background: linear-gradient(to top, #fddbb0 40%, #fcb6b2 100%);
  opacity: 1;
}
.day-scene svg { width: 100%; height: 100%; }

/* Clouds animation */ 
.cloud {
  filter: blur(1px); /* soft, fluffy edges */
  transform-origin: center;
}

/* Cloud 1 - fast small cloud */
.cloud1 {
  animation: drift1 15s linear infinite, float1 6s ease-in-out infinite alternate;
}

/* Cloud 2 - medium speed */
.cloud2 {
  animation: drift2 30s linear infinite, float2 8s ease-in-out infinite alternate;
}

/* Cloud 3 - slow large cloud */
.cloud3 {
  animation: drift3 60s linear infinite, float3 10s ease-in-out infinite alternate;
}

/* Horizontal drifting */
@keyframes drift1 {
  0% { transform: translateX(-120px); }
  100% { transform: translateX(300px); }
}

@keyframes drift2 {
  0% { transform: translateX(-150px); }
  100% { transform: translateX(350px); }
}

@keyframes drift3 {
  0% { transform: translateX(-180px); }
  100% { transform: translateX(400px); }
}

/* Night Scene */
.night-scene {
  background: linear-gradient(to top, #1a1a40 30%, #2c3e70 100%);
  opacity: 0;
}
.night-scene svg { width: 100%; height: 100%; }

/* Stars animation */
/* Stars twinkle + move */
.stars circle {
  animation: twinkleMove 6s ease-in-out infinite alternate;
}
.stars circle:nth-child(2) { animation-delay: 1s; }
.stars circle:nth-child(3) { animation-delay: 2s; }
.stars circle:nth-child(4) { animation-delay: 3s; }
.stars circle:nth-child(5) { animation-delay: 4s; }

@keyframes twinkleMove {
  0%   { opacity: 0.3; transform: translateX(0) translateY(0); }
  50%  { opacity: 1; transform: translateX(5px) translateY(-2px); }
  100% { opacity: 0.3; transform: translateX(-5px) translateY(2px); }
}

/* Toggle state switching */
.toggle.night .day-scene { opacity: 0; }
.toggle.night .night-scene { opacity: 1; }

/* Footer slightly above bottom */
footer {
  font-family: 'Figtree', sans-serif;
  text-align: center;
  font-size: 16px; 
  font-weight: 500; 
  width: 100%;
  padding: 10px 0;
  margin-top: auto;          /* push footer down naturally */
  margin-bottom: 40px;       /* distance from bottom */
  background: rgba(0,0,0,0.05);
  color: inherit;
}

.scene svg * {
  pointer-events: none;
}