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

body {
  overflow: hidden;
  background-color: #000;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #fff;
  transition: background 1.5s ease;
}

#container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

/* Themes */
body.theme-molten {
  background: linear-gradient(180deg, #000000 0%, #100500 50%, #1f0a00 100%);
}
body.theme-molten .glow {
  background: radial-gradient(
    circle at 50% 50%,
    rgba(255, 100, 0, 0.05) 0%,
    rgba(200, 50, 0, 0.05) 50%,
    transparent 65%
  );
}
body.theme-molten #controls {
  background: rgba(50, 20, 10, 0.3);
  border-color: rgba(255, 120, 50, 0.4);
}
body.theme-molten .theme-btn.active,
body.theme-molten .action-btn.active {
  background: rgba(255, 100, 0, 0.5);
  border-color: rgba(255, 100, 0, 0.7);
}
body.theme-molten .toggle-slider {
  background: rgba(180, 80, 40, 0.4);
}
body.theme-molten input:checked + .toggle-slider {
  background-color: rgba(255, 100, 0, 0.6);
}
body.theme-molten .toggle-slider:before {
  box-shadow: 0 0 8px rgba(255, 150, 50, 0.8);
}

body.theme-cosmic {
  background: linear-gradient(180deg, #000000 0%, #050010 50%, #0a001f 100%);
}
body.theme-cosmic .glow {
  background: radial-gradient(
    circle at 50% 50%,
    rgba(147, 112, 219, 0.05) 0%,
    rgba(75, 0, 130, 0.05) 50%,
    transparent 65%
  );
}
body.theme-cosmic #controls {
  background: rgba(40, 20, 60, 0.3);
  border-color: rgba(147, 112, 219, 0.4);
}
body.theme-cosmic .theme-btn.active,
body.theme-cosmic .action-btn.active {
  background: rgba(147, 112, 219, 0.5);
  border-color: rgba(147, 112, 219, 0.7);
}
body.theme-cosmic .toggle-slider {
  background: rgba(147, 112, 219, 0.4);
}
body.theme-cosmic input:checked + .toggle-slider {
  background-color: rgba(147, 112, 219, 0.6);
}
body.theme-cosmic .toggle-slider:before {
  box-shadow: 0 0 8px rgba(170, 130, 230, 0.8);
}

body.theme-emerald {
  background: linear-gradient(180deg, #000000 0%, #001005 50%, #001f0a 100%);
}
body.theme-emerald .glow {
  background: radial-gradient(
    circle at 50% 50%,
    rgba(0, 255, 127, 0.05) 0%,
    rgba(46, 139, 87, 0.05) 50%,
    transparent 65%
  );
}
body.theme-emerald #controls {
  background: rgba(20, 60, 40, 0.3);
  border-color: rgba(60, 179, 113, 0.4);
}
body.theme-emerald .theme-btn.active,
body.theme-emerald .action-btn.active {
  background: rgba(60, 179, 113, 0.5);
  border-color: rgba(60, 179, 113, 0.7);
}
body.theme-emerald .toggle-slider {
  background: rgba(60, 179, 113, 0.4);
}
body.theme-emerald input:checked + .toggle-slider {
  background-color: rgba(60, 179, 113, 0.6);
}
body.theme-emerald .toggle-slider:before {
  box-shadow: 0 0 8px rgba(100, 200, 150, 0.8);
}

/* Glow overlay */
.glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  mix-blend-mode: screen;
  opacity: 0.75;
  transition: background 1.5s ease;
}

/* Controls */
#controls {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 20px;
  z-index: 100;
  border: 1px solid;
  border-radius: 16px;
  padding: 10px 20px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
  transition: background 1.5s ease, border-color 1.5s ease;
}

#theme-selector,
#action-selector {
  display: flex;
  gap: 10px;
}

.separator {
  width: 1px;
  height: 24px;
  background-color: rgba(255, 255, 255, 0.2);
}

.theme-btn,
.action-btn {
  padding: 6px 14px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.8);
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.3s, border-color 0.3s, color 0.3s;
  font-size: 13px;
  font-weight: 300;
}

.theme-btn:hover,
.action-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.4);
}

.theme-btn.active,
.action-btn.active {
  color: #fff;
  font-weight: 500;
}

.toggle-option {
  display: flex;
  align-items: center;
  gap: 10px;
}

.toggle-option label[for='animateToggle'] {
  cursor: pointer;
  font-size: 13px;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.9);
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 46px;
  height: 24px;
}
.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  transition: 0.3s;
  border-radius: 24px;
}
.toggle-slider:before {
  position: absolute;
  content: '';
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.3s;
  border-radius: 50%;
}
input:checked + .toggle-slider:before {
  transform: translateX(22px);
}

/* Responsive */
@media (max-width: 768px) {
  #controls {
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    padding: 10px;
    width: auto;
    bottom: 15px;
  }
  .separator {
    display: none;
  }
}