:root {
  --paper: #f3eadf;
  --ink: #32263c;
  --soft-ink: rgba(50, 38, 60, .56);
  --serif: Georgia, "Times New Roman", serif;
  --sans: ui-rounded, "SF Pro Rounded", "Avenir Next", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--paper);
  color: var(--ink);
  overflow: hidden;
}

body { font-family: var(--sans); }
button { font: inherit; }

.house-nav {
  position: fixed;
  top: max(.8rem, env(safe-area-inset-top));
  left: 50%;
  z-index: 30;
  display: flex;
  gap: .6rem;
  align-items: center;
  transform: translateX(-50%);
  padding: .55rem .78rem;
  border: 1px solid rgba(50, 38, 60, .12);
  border-radius: 999px;
  color: rgba(50, 38, 60, .68);
  background: rgba(243, 234, 223, .48);
  backdrop-filter: blur(13px);
  font-size: clamp(.6rem, 1vw, .72rem);
  letter-spacing: .08em;
  white-space: nowrap;
  opacity: .62;
  transition: opacity .8s ease, border-color .8s ease;
}

.house-nav:hover,
.house-nav:focus-within { opacity: 1; border-color: rgba(50, 38, 60, .3); }

.house-nav a { color: rgba(50, 38, 60, .52); text-decoration: none; }
.house-nav a:hover,
.house-nav a:focus-visible { color: var(--ink); }
.house-nav [aria-current="page"] { color: var(--ink); }

#room {
  position: relative;
  min-height: 100svh;
  isolation: isolate;
}

.threshold,
.ending {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: grid;
  place-content: center;
  justify-items: start;
  padding: clamp(1.5rem, 8vw, 8rem);
  background:
    radial-gradient(circle at 20% 18%, rgba(255, 88, 125, .2), transparent 36%),
    radial-gradient(circle at 84% 77%, rgba(50, 132, 255, .2), transparent 38%),
    var(--paper);
  transition: opacity 1.8s ease, visibility 1.8s;
}

h1,
.ending p {
  margin: 0;
  max-width: 11ch;
  font: 500 clamp(3.1rem, 10vw, 9rem)/.84 var(--sans);
  letter-spacing: -.075em;
}

#enter,
#again,
.return {
  margin-top: 2.2rem;
  padding: .7rem 0;
  border: 0;
  border-bottom: 1px solid var(--soft-ink);
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  text-decoration: none;
}

#enter:hover,
#again:hover,
.return:hover,
#enter:focus-visible,
#again:focus-visible,
.return:focus-visible { border-color: var(--ink); }

.performance {
  position: absolute;
  inset: 0;
  visibility: hidden;
  opacity: 0;
  transition: opacity 1.8s ease, visibility 1.8s;
}

#colour-field {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: none;
}

.ending {
  visibility: hidden;
  opacity: 0;
  background: transparent;
  pointer-events: none;
}

.ending p {
  color: rgba(255, 255, 255, .92);
  line-height: .98;
  letter-spacing: -.055em;
  text-shadow: 0 3px 35px rgba(30, 20, 50, .28);
}

.ending #again {
  color: rgba(50, 38, 60, .92);
  border-color: rgba(50, 38, 60, .5);
  text-shadow: 0 1px 14px rgba(243, 234, 223, .92);
  opacity: 0;
  transition: opacity 1.5s ease 2.5s;
}

.ending .return {
  margin-top: .2rem;
  color: rgba(50, 38, 60, .78);
  border-bottom: 1px solid rgba(50, 38, 60, .42);
  text-shadow: 0 1px 14px rgba(243, 234, 223, .92);
  opacity: 0;
  transition: opacity 1.5s ease 3.1s;
}

[data-state="running"] .threshold,
[data-state="ending"] .threshold {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

[data-state="running"] .performance,
[data-state="ending"] .performance {
  visibility: visible;
  opacity: 1;
}

[data-state="ending"] .ending {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
}

[data-state="ending"] .ending #again,
[data-state="ending"] .ending .return { opacity: 1; }

.sound-fallback {
  position: absolute;
  left: 50%;
  bottom: max(2rem, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  border: 1px solid rgba(255,255,255,.65);
  padding: .65rem .9rem;
  color: white;
  background: rgba(40, 28, 56, .48);
  backdrop-filter: blur(12px);
}

@media (max-width: 620px) {
  .threshold, .ending { padding: 1.4rem; }
  h1, .ending p { font-size: clamp(3rem, 18vw, 6rem); }
  .house-nav { gap: .48rem; padding-inline: .65rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}