:root {
  --bg: #08030f;
  --ink: #f4ecff;
  --muted: #b9a3d3;
  --purple: #7b2cbf;
  --purple-bright: #b06cff;
  --line: rgba(190, 146, 238, 0.28);
  --pad: 28px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: "Cinzel", Georgia, "Times New Roman", serif;
  -webkit-font-smoothing: antialiased;
}

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: grab;
  outline: none;
}
#scene:active { cursor: grabbing; }

#flash {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 50% 46%, #d9b8ff 0%, #8a3cff 35%, transparent 70%);
  opacity: 0;
  pointer-events: none;
  mix-blend-mode: screen;
  transition: opacity 0.7s ease-out;
}
#flash.on { opacity: 0.85; transition: opacity 0.08s ease-in; }

header {
  position: fixed;
  top: calc(var(--pad) + env(safe-area-inset-top));
  left: calc(var(--pad) + env(safe-area-inset-left));
  right: calc(var(--pad) + env(safe-area-inset-right));
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  pointer-events: none;
  z-index: 2;
}
.wordmark {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  line-height: 1.3;
}
.wordmark span {
  display: block;
  font-weight: 600;
  font-size: 10px;
  letter-spacing: 0.36em;
  color: var(--muted);
}
.colors {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 4px;
}
.colors i {
  width: 22px; height: 10px;
  border-radius: 5px;
  background: linear-gradient(90deg, var(--purple) 50%, #fff 50%);
  box-shadow: 0 0 10px rgba(176, 108, 255, 0.6);
}

#caption {
  position: fixed;
  left: 0; right: 0;
  bottom: calc(var(--pad) + 74px + env(safe-area-inset-bottom));
  margin: 0;
  text-align: center;
  font-size: 11px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--muted);
  pointer-events: none;
  transition: opacity 0.35s;
  z-index: 2;
}
#caption.swap { opacity: 0; }

#loading {
  position: fixed;
  top: 50%; left: 0; right: 0;
  transform: translateY(-50%);
  text-align: center;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--muted);
  z-index: 3;
  pointer-events: none;
}
#loading.error { color: #ff9fb0; }
#loading.done { display: none; }

footer {
  position: fixed;
  left: calc(var(--pad) + env(safe-area-inset-left));
  right: calc(var(--pad) + env(safe-area-inset-right));
  bottom: calc(var(--pad) + env(safe-area-inset-bottom));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  z-index: 2;
}
.controls { display: flex; gap: 8px; flex-wrap: wrap; }
button {
  min-height: 44px;
  min-width: 44px;
  padding: 0 20px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: rgba(25, 11, 43, 0.82);
  color: var(--ink);
  font: 600 13px/1 "Cinzel", Georgia, serif;
  letter-spacing: 0.08em;
  cursor: pointer;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: background 0.2s, border-color 0.2s, transform 0.1s;
}
button:hover { background: #3a1760; border-color: #c2a0e7; }
button:active { transform: translateY(1px); }
button:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }
#separate {
  background: #efe3ff;
  color: #240b3a;
  border-color: rgba(255, 255, 255, 0.4);
}
#separate:hover { background: #dcc3ff; }
.hint {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

@media (max-width: 600px) {
  :root { --pad: 18px; }
  .wordmark { font-size: 14px; letter-spacing: 0.18em; }
  .wordmark span { font-size: 8px; letter-spacing: 0.3em; }
  .colors { font-size: 8px; }
  footer { flex-direction: column; justify-content: center; gap: 10px; }
  .controls { justify-content: center; }
  button { padding: 0 16px; font-size: 12px; }
  #caption { bottom: calc(var(--pad) + 100px + env(safe-area-inset-bottom)); font-size: 9px; letter-spacing: 0.3em; }
}

@media (prefers-reduced-motion: reduce) {
  #flash, #caption, button { transition: none; }
}