:root {
  --midnight-indigo: #1f1467;
  --electric-cyan: #0bfdf7;
  --slate-grey: #5b5578;
  --ink: #201a33;
  --canvas: #f7f7fa;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--midnight-indigo);
  font-family: "Montserrat", "Avenir Next", "Segoe UI", sans-serif;
}

.page-shell {
  position: relative;
  display: grid;
  min-height: 100svh;
  padding: clamp(1.5rem, 4vw, 4rem);
  overflow: hidden;
}

.hero {
  align-self: center;
  width: min(100%, 74rem);
  margin: 0 auto;
  transform: translateY(-1.5vh);
}

.brand-logo {
  display: block;
  width: clamp(17rem, 39vw, 34rem);
  height: auto;
  margin-bottom: clamp(3.5rem, 10vh, 7rem);
  animation: reveal 800ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.message {
  display: grid;
  grid-template-columns: 3px minmax(0, 53rem);
  grid-template-areas:
    "line title"
    ". status";
  column-gap: clamp(1.25rem, 3vw, 2.75rem);
  row-gap: clamp(1.75rem, 4vh, 3rem);
}

.accent-line {
  grid-area: line;
  align-self: stretch;
  width: 3px;
  height: auto;
  min-height: 0;
  background: var(--electric-cyan);
  transform-origin: top;
  animation: draw-line 650ms 300ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

h1 {
  grid-area: title;
  max-width: 18ch;
  margin: 0;
  color: var(--midnight-indigo);
  font-size: clamp(1.5rem, 4.2vw, 4rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.052em;
  text-wrap: balance;
  animation: reveal 800ms 160ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.status {
  grid-area: status;
  margin: 0;
  color: var(--slate-grey);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  animation: reveal 800ms 300ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes reveal {
  from {
    opacity: 0;
    transform: translateY(1.25rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes draw-line {
  from {
    opacity: 0;
    transform: scaleY(0);
  }
  to {
    opacity: 1;
    transform: scaleY(1);
  }
}

@media (max-width: 700px) {
  .page-shell {
    padding: 1.5rem;
  }

  .hero {
    transform: translateY(-3vh);
  }

  .brand-logo {
    width: min(21rem, 90vw);
    margin-bottom: 4rem;
  }

  .message {
    grid-template-columns: 2px minmax(0, 1fr);
    column-gap: 1.25rem;
  }

  h1 {
    font-size: clamp(1.5rem, 7.5vw, 2.75rem);
    line-height: 1.06;
  }
}

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

/* 404 page */

.error-shell {
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 100svh;
  padding: clamp(1.5rem, 4vw, 4rem);
}

.error-brand {
  width: fit-content;
}

.error-brand .brand-logo {
  width: clamp(14rem, 26vw, 22rem);
  margin: 0;
}

.error-content {
  display: grid;
  grid-template-columns: minmax(12rem, 0.85fr) minmax(18rem, 1.15fr);
  gap: clamp(2.5rem, 7vw, 8rem);
  align-items: center;
  width: min(100%, 74rem);
  margin: 0 auto;
}

.error-code {
  margin: 0;
  color: var(--midnight-indigo);
  font-size: clamp(8rem, 22vw, 18rem);
  font-weight: 700;
  line-height: 0.75;
  letter-spacing: -0.09em;
  animation: reveal 800ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.error-message {
  display: grid;
  grid-template-columns: 3px minmax(0, 1fr);
  gap: clamp(1.25rem, 3vw, 2.5rem);
  align-items: stretch;
}

.error-accent {
  background: var(--electric-cyan);
  transform-origin: top;
  animation: draw-line 650ms 250ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.error-message h1 {
  max-width: 12ch;
  font-size: clamp(2rem, 4vw, 3.75rem);
  letter-spacing: -0.045em;
}

.error-description {
  max-width: 34rem;
  margin: 1.5rem 0 0;
  color: var(--slate-grey);
  font-size: clamp(0.95rem, 1.4vw, 1.1rem);
  font-weight: 400;
  line-height: 1.7;
  animation: reveal 800ms 160ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.home-link {
  display: inline-flex;
  gap: 0.75rem;
  align-items: center;
  margin-top: 2rem;
  color: var(--midnight-indigo);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-decoration: none;
  text-transform: uppercase;
  animation: reveal 800ms 280ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.home-link span {
  font-size: 1.1rem;
  transition: transform 180ms ease;
}

.home-link:hover span,
.home-link:focus-visible span {
  transform: translateX(0.35rem);
}

.home-link:focus-visible,
.error-brand:focus-visible {
  outline: 3px solid var(--electric-cyan);
  outline-offset: 0.4rem;
}

@media (max-width: 700px) {
  .error-shell {
    padding: 1.5rem;
  }

  .error-brand .brand-logo {
    width: min(17rem, 76vw);
  }

  .error-content {
    grid-template-columns: 1fr;
    gap: 3.5rem;
    align-content: center;
    padding: 3rem 0;
  }

  .error-code {
    font-size: clamp(7.5rem, 42vw, 11rem);
  }

  .error-message {
    grid-template-columns: 2px minmax(0, 1fr);
    gap: 1.25rem;
  }

  .error-message h1 {
    font-size: clamp(1.75rem, 8vw, 2.75rem);
  }
}