:root {
  --bg: #07090f;
  --bg-elev: #121824;
  --ink: #e8eef8;
  --muted: #c5d0e0;
  --accent: #d7fff6;
  --accent-fill: #8ee7d2;
  --accent-press: #6fd0ba;
  --accent-ink: #06221c;
  --focus: #f2d48a;
  --amber: #e7c27a;
  --line: #8eb0bf;
  --select-bg: #1a3f3a;
  color-scheme: dark;
}

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

html {
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  align-items: safe center;
  justify-content: center;
  justify-content: safe center;
  padding:
    max(1rem, env(safe-area-inset-top))
    max(1rem, env(safe-area-inset-right))
    max(1.25rem, env(safe-area-inset-bottom))
    max(1rem, env(safe-area-inset-left));
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 12% 22%, rgba(142, 231, 210, 0.9) 0 1.5px, transparent 2px),
    radial-gradient(circle at 86% 18%, rgba(231, 194, 122, 0.95) 0 1.6px, transparent 2.1px),
    radial-gradient(circle at 78% 78%, rgba(184, 243, 228, 0.85) 0 1.5px, transparent 2px),
    radial-gradient(circle at 18% 84%, rgba(184, 243, 228, 0.75) 0 1.4px, transparent 1.9px),
    linear-gradient(rgba(158, 190, 206, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(158, 190, 206, 0.045) 1px, transparent 1px),
    radial-gradient(ellipse at 50% 42%, #182236 0%, var(--bg) 62%);
  background-size: auto, auto, auto, auto, 56px 56px, 56px 56px, auto;
  color: var(--ink);
  font-family: "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.5;
}

#field {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse at 50% 46%, #000 42%, transparent 80%);
  mask-image: radial-gradient(ellipse at 50% 46%, #000 42%, transparent 80%);
}

main {
  position: relative;
  z-index: 2;
  width: min(40rem, 100%);
  padding: clamp(1.35rem, 3vw, 2.4rem);
  background: var(--bg-elev);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.42);
}

main::before {
  content: "";
  position: absolute;
  top: 0;
  left: 1.4rem;
  right: 1.4rem;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-fill), var(--amber), transparent);
}

.stack,
footer {
  display: grid;
  gap: 0.85rem;
}

header {
  margin-bottom: 1rem;
}

footer {
  margin-top: 1.35rem;
}

h1,
p {
  margin: 0;
}

h1 {
  font-size: clamp(1.45rem, 2.5vw, 2.05rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.28;
  text-wrap: balance;
  color: var(--ink);
}

.lede {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 1.02rem;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0;
  color: var(--muted);
  font-family: ui-monospace, "Cascadia Code", "Segoe UI Mono", Menlo, Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.glyph {
  color: var(--accent-fill);
  flex: 0 0 auto;
  animation: holding-pulse 4.8s ease-in-out infinite;
}

#countdown {
  margin-top: 1.15rem;
  color: var(--ink);
  font-family: ui-monospace, "Cascadia Code", "Segoe UI Mono", Menlo, Consolas, monospace;
  font-size: 0.98rem;
  font-variant-numeric: tabular-nums;
}

.action {
  margin-top: 1.15rem;
}

.go,
.go:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 11rem;
  padding: 0.75rem 1.35rem;
  border: 2px solid transparent;
  border-radius: 999px;
  background: var(--accent-fill);
  color: var(--accent-ink);
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.go:hover {
  background: var(--accent);
  color: var(--accent-ink);
}

.go:active {
  background: var(--accent-press);
  color: var(--accent-ink);
}

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

.fine {
  color: var(--muted);
  font-size: 0.92rem;
}

::selection {
  background: var(--select-bg);
  color: var(--ink);
}

@keyframes holding-pulse {
  50% {
    opacity: 0.55;
  }
}

@media (max-width: 640px) {
  h1 {
    font-size: clamp(1.35rem, 6.4vw, 1.7rem);
  }

  .go,
  .go:visited {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (forced-colors: active) {
  #field {
    display: none;
  }

  main {
    border: 1px solid CanvasText;
    box-shadow: none;
  }

  .go,
  .go:visited {
    border: 2px solid LinkText;
  }
}