:root {
  --bg: #ffffff;
  --fg: #111827;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--fg);
}

body {
  font-family: Arial, Helvetica, sans-serif;
}

.stage {
  position: fixed;
  inset: 0;
  overflow: hidden;
  background: var(--bg);
}

#particle-canvas {
  position: absolute;
  inset: 0;
  display: block;
  z-index: 0;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 10;
  pointer-events: none;
}

.overlay .word {
  pointer-events: auto;
}

.stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(10px, 2.6vh, 28px);
}

.word {
  position: relative;
  display: inline-block;
  white-space: nowrap;
  user-select: none;
  text-transform: lowercase;
  font-weight: 900;
  font-size: clamp(12px, 4vw, 45px);
  line-height: 1;
  letter-spacing: 0.01em;
}

.glyph,
.glyph .inner {
  display: inline-block;
  transform-origin: 50% 60%;
  will-change: transform;
}

@keyframes jiggle {
  0%   { transform: translate3d(0,0,0) rotate(0deg) scale(1); }
  20%  { transform: translate3d(0,-8%,0) rotate(-10deg) scale(1.06); }
  40%  { transform: translate3d(0,6%,0) rotate(8deg) scale(0.96); }
  60%  { transform: translate3d(0,-5%,0) rotate(-6deg) scale(1.04); }
  80%  { transform: translate3d(0,3%,0) rotate(4deg) scale(0.98); }
  100% { transform: translate3d(0,0,0) rotate(0deg) scale(1); }
}

.jiggle {
  animation: jiggle 520ms cubic-bezier(.22,.61,.36,1) both;
}

.dot.jiggle {
  animation-duration: 420ms;
}

.hint {
  position: absolute;
  left: 50%;
  bottom: 10px;
  z-index: 20;
  transform: translateX(-50%);
  padding: 6px 10px;
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 999px;
  background: rgba(0,0,0,0.04);
  color: var(--fg);
  font: 12px/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .02em;
  white-space: nowrap;
  pointer-events: none;
  backdrop-filter: blur(2px);
  opacity: .78;
}

.perf {
  position: absolute;
  right: 10px;
  bottom: 10px;
  z-index: 20;
  padding: 4px 8px;
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 8px;
  background: rgba(0,0,0,0.06);
  color: var(--fg);
  font: 12px/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  pointer-events: none;
  opacity: .78;
}

.theme-toggle {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 30;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(0,0,0,0.15);
  border-radius: 999px;
  background: rgba(0,0,0,0.05);
  color: var(--fg);
  font-size: 16px;
  cursor: pointer;
}

.theme-toggle:hover {
  filter: brightness(0.92);
}

@media (prefers-reduced-motion: reduce) {
  .jiggle {
    animation: none;
  }
}