:root {
  --bg: #0a0810;
  --fg: #e9e6ff;
  --accent: #b19cff;
  --accent-glow: rgba(177, 156, 255, 0.35);
  --grad-1: #120d1d;
  --grad-2: #07060c;
}

[data-theme="light"] {
  --bg: #ffffff;
  --fg: #161616;
  --accent: #4b2fff;
  --accent-glow: rgba(75, 47, 255, 0.75);
  --grad-1: #ffffff;
  --grad-2: #dcdcff;
}

html, body {
  height: 100%;
  margin: 0;
  font-family: "Barlow Condensed", sans-serif;
}

body {
  display: grid;
  place-items: center;
  overflow: hidden;
  background: radial-gradient(
    1200px 800px at 80% 20%,
    var(--grad-1) 0%,
    var(--bg) 45%,
    var(--grad-2) 100%
  );
  color: var(--fg);
  transition: background 0.6s ease, color 0.4s ease;
}

.scene {
  position: relative;
  width: min(900px, 92vw);
  padding: 6vh 4vw;
  text-align: center;
  z-index: 3;
}

.scene::before {
  content: "";
  position: absolute;
  inset: -12vmax;
  background:
    radial-gradient(520px 280px at 30% 60%, var(--accent) 35%, transparent 60%),
    radial-gradient(420px 220px at 70% 35%, var(--accent) 25%, transparent 60%);
  filter: blur(30px);
  opacity: 0.22;
  z-index: -1;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
    filter: blur(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

.text {
  opacity: 0;
  animation: fadeUp 900ms ease-out forwards;
  text-shadow:
    0 1px 0 rgba(0,0,0,0.35),
    0 0 18px var(--accent-glow);
}

.text:nth-child(1) { animation-delay: 200ms; }
.text:nth-child(2) { animation-delay: 700ms; }

.headline img {
  height: 6rem;
}

.subhead {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-top: 1.1rem;
}

#theme-toggle {
  position: fixed;
  top: max(0.75rem, env(safe-area-inset-top));
  right: max(0.75rem, env(safe-area-inset-right));
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 5;
  perspective: 600px;
  transition: transform 0.25s ease;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  
}

@media (hover: none) {
  #theme-toggle:not(.flipping):hover {
    transform: none;
  }
}

#theme-toggle:not(.flipping):hover {
  transform: rotate(15deg);
}

#theme-toggle.flipping {
  pointer-events: none;
}

#theme-icon {
  width: 28px;
  height: 28px;
  display: block;
  transform: rotateY(0deg);
  backface-visibility: hidden;
  filter: drop-shadow(0 0 6px var(--accent-glow));
  transition:
    transform 0.6s cubic-bezier(.4,0,.2,1),
    opacity 0.25s ease,
    filter 0.25s ease;
}

#theme-toggle.flipping #theme-icon {
  transform: rotateY(180deg);
}

#theme-toggle.ghost #theme-icon {
  opacity: 0.85;
  filter:
    drop-shadow(0 0 14px var(--accent-glow))
    blur(0.6px);
}

#theme-overlay {
  position: fixed;
  left: 0;
  top: 0;
  width: 300vmax;
  height: 300vmax;
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
  transform: translate(-50%, -50%) scale(0);
  transition: transform 0.9s ease-in-out;
  will-change: transform;
  contain: layout paint;
}

#theme-overlay.active {
  transform: translate(-50%, -50%) scale(1);
}

#theme-overlay.reset {
  transition: none;
  transform: translate(-50%, -50%) scale(0);
}

@media (max-width: 600px) {
  #theme-toggle {
    width: 44px;
    height: 44px;
    top: 0.75rem;
    right: 0.75rem;
  }

  #theme-icon {
    width: 26px;
    height: 26px;
    margin: auto;
  }
}

@media (max-width: 600px) {
  .scene {
    padding: 10vh 6vw;
  }

  .headline img {
    height: 4.5rem;
  }

  .subhead {
    font-size: clamp(1.6rem, 7vw, 2.4rem);
  }
}

html, body {
  max-width: 100%;
  overscroll-behavior: none;
  overflow: hidden;
}

@media (max-width: 480px) {
  #theme-toggle {
    right: 1rem;
  }
}