:root {
  color-scheme: dark;
  --bg: #0e0f12;
  --bg-glow: #1a1c22;
  --fg: #eceef2;
  --muted: #a4a9b5;
  --accent: #e5a04a;
  --line: color-mix(in srgb, var(--fg) 12%, transparent);
  --font: "Segoe UI", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Helvetica Neue", Arial, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  color: var(--fg);
  background:
    radial-gradient(ellipse 80% 55% at 50% -10%, var(--bg-glow), transparent 60%),
    radial-gradient(ellipse 50% 40% at 80% 100%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 55%),
    var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.stage {
  min-height: 100dvh;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 0.85rem;
  padding: clamp(1.5rem, 5vw, 3rem);
  text-align: center;
}

.brand {
  margin: 0;
  font-size: clamp(2.75rem, 8vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--fg);
}

.headline {
  margin: 0;
  font-size: clamp(1.15rem, 2.4vw, 1.35rem);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--accent);
}

.lede {
  margin: 0;
  max-width: 28ch;
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  color: var(--muted);
}

.stage::after {
  content: "";
  display: block;
  width: 2.5rem;
  height: 1px;
  margin-top: 0.75rem;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.7;
}

/* 404 */
.back {
  margin-top: 1.25rem;
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.1rem;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.back:hover,
.back:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
  outline: none;
}

@media (prefers-reduced-motion: no-preference) {
  .brand,
  .headline,
  .lede,
  .stage::after,
  .back {
    animation: rise 0.9s var(--ease) both;
  }

  .headline {
    animation-delay: 0.12s;
  }

  .lede {
    animation-delay: 0.22s;
  }

  .stage::after {
    animation-delay: 0.32s;
  }

  .back {
    animation-delay: 0.4s;
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(0.6rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .brand,
  .headline,
  .lede,
  .stage::after,
  .back {
    animation: none;
  }
}