*, *::before, *::after { box-sizing: border-box; }

/* Author display rules would otherwise beat the hidden attribute. */
[hidden] { display: none !important; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  background: var(--night);
}

body {
  margin: 0;
  min-height: 100svh;
  background: radial-gradient(120% 70% at 50% 0%, var(--night-glow), var(--night) 70%) no-repeat;
  color: var(--ink);
  font: 400 1rem/1.5 var(--font-text);
}

main {
  min-height: 100svh;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: clamp(1.25rem, 4vw, 2.25rem);
  padding:
    max(1.5rem, env(safe-area-inset-top))
    max(0.75rem, env(safe-area-inset-right))
    max(1.5rem, env(safe-area-inset-bottom))
    max(0.75rem, env(safe-area-inset-left));
}

.wordmark {
  margin: 0;
  font: 800 clamp(1.75rem, 8vw, 3.75rem)/1.05 var(--font-text);
  letter-spacing: -0.035em;
  text-align: center;
  overflow-wrap: anywhere;
}
.wordmark span { color: var(--amber); }

.tagline {
  margin: 0;
  font-size: clamp(1.3rem, 4.6vw, 2.1rem);
  font-weight: 650;
  line-height: 1.2;
  text-align: center;
  text-wrap: balance;
}

.strapline {
  margin: -0.5rem 0 0;
  max-width: 34ch;
  color: var(--ink-dim);
  text-align: center;
  text-wrap: balance;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--touch);
  min-width: var(--touch);
  padding: 0 1.25rem;
  border-radius: calc(var(--radius) / 1.5);
  background: var(--amber);
  color: var(--on-amber);
  font-weight: 700;
  text-decoration: none;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: no-preference) {
  :is(.tagline, .strapline) {
    transition: opacity 700ms ease, translate 700ms ease;
  }
  main[data-state="running"] :is(.tagline, .strapline) {
    opacity: 0;
    translate: 0 0.5rem;
  }
}