:root {
  color-scheme: dark;
  --bg: #07080b;
  --glow: #d7c4a3;
  --ink: #f4efe6;
  --muted: #8d8578;
  --line: rgba(215, 196, 163, 0.22);
  --pick: rgba(215, 196, 163, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.45 "Iowan Old Style", "Palatino Linotype", Palatino, serif;
}

body {
  min-height: 100vh;
  overflow: hidden;
}

.sky {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 42% 28% at 50% 42%, rgba(215, 196, 163, 0.16), transparent 70%),
    radial-gradient(ellipse 80% 50% at 50% 120%, rgba(20, 22, 28, 0.9), transparent 55%),
    #07080b;
}

.sky::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 100% 3px;
  pointer-events: none;
  opacity: 0.35;
}

.boot {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem 1.25rem 3rem;
}

.mark {
  position: absolute;
  top: 1.4rem;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  letter-spacing: 0.42em;
  font-size: 0.68rem;
  text-transform: uppercase;
  color: var(--muted);
}

.stage {
  width: min(34rem, 100%);
  text-align: center;
}

.stage h1 {
  margin: 0 0 1.6rem;
  font-size: clamp(1.7rem, 4vw, 2.35rem);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.versions {
  display: grid;
  gap: 0.7rem;
  margin: 0 auto 1.25rem;
  padding: 0;
  list-style: none;
  max-width: 22rem;
}

.versions button {
  appearance: none;
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font: inherit;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.versions button:hover,
.versions button:focus-visible {
  background: var(--pick);
  outline: none;
}

.versions button.is-on {
  background: var(--pick);
  border-color: var(--glow);
  box-shadow: 0 0 0 1px rgba(215, 196, 163, 0.25);
}

.start {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--glow);
  font: inherit;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.78rem;
  cursor: pointer;
  padding: 0.4rem 0;
}

.start[disabled] {
  color: var(--muted);
  cursor: default;
}

.status {
  min-height: 1.4rem;
  margin: 1.1rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.boot.is-starting .stage,
.boot.is-starting .mark {
  opacity: 0.28;
}

.beam {
  position: fixed;
  left: 50%;
  top: 50%;
  width: 0;
  height: 1px;
  transform: translate(-50%, -50%);
  background: var(--glow);
  opacity: 0;
  pointer-events: none;
}

.boot.is-starting .beam {
  animation: beam 1.1s ease forwards;
}

@keyframes beam {
  0% {
    width: 0;
    opacity: 0;
  }
  35% {
    width: min(28rem, 70vw);
    opacity: 0.9;
  }
  100% {
    width: min(4rem, 20vw);
    opacity: 0.15;
  }
}