:root {
  color-scheme: light dark;
  font-family:
    "Plus Jakarta Sans", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  color: var(--color-ink);
  background: var(--color-paper);
  font-synthesis: none;
  --color-ink: #172a3a;
  --color-muted: #536779;
  --color-paper: #f3f8fc;
  --color-glow: #0969da1a;
  --color-surface: #ffffff;
  --color-primary: #0369a1;
  --color-primary-hover: #075985;
  --color-on-primary: #ffffff;
  --color-accent: #c2410c;
  --color-accent-hover: #9a3412;
  --color-on-accent: #ffffff;
  --color-on-accent-hover: #ffffff;
  --color-line: #bfd6e8;
  --color-browser: #0b1219;
  --color-browser-line: #304354;
  --color-browser-dot: #5e7080;
  --color-browser-muted: #9eb1c2;
  --color-browser-panel: #182632;
  --color-browser-heading: #edf4fa;
  --color-browser-accent: #6bb8ff;
  --color-browser-tab-border: #3b5367;
  --color-browser-tab: #233747;
  --color-browser-tab-text: #edf5fb;
  --color-browser-idle-text: #a7b6c3;
  --color-browser-idle-border: #8193a1;
  --color-browser-highlight: #337fba;
  --color-browser-caption: #b8c6d2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-ink: #e9edf2;
    --color-muted: #aeb8c2;
    --color-paper: #15191e;
    --color-glow: #4493f826;
    --color-surface: #20252b;
    --color-primary: #6bb8ff;
    --color-primary-hover: #8ac7ff;
    --color-on-primary: #0c1d2c;
    --color-accent: #fb7a32;
    --color-accent-hover: #fb923c;
    --color-on-accent: #1c120d;
    --color-on-accent-hover: #1c120d;
    --color-line: #303f4d;
    --color-browser: #0b1219;
    --color-browser-line: #304354;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 20rem;
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(60rem 30rem at 50% -10rem, var(--color-glow), transparent 70%),
    var(--color-paper);
}

a {
  color: inherit;
}

.site-shell {
  width: min(74rem, calc(100% - 3rem));
  margin-inline: auto;
}

.site-header {
  display: flex;
  min-height: 6.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-ink);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand img {
  border-radius: 0.65rem;
}

nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.star-count {
  display: inline-flex;
  min-width: 3.5rem;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.4rem 0.65rem;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  color: var(--color-muted);
  background: var(--color-surface);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  text-decoration: none;
}

.star-count:hover {
  border-color: var(--color-primary);
  color: var(--color-ink);
}

.star-count svg {
  width: 1rem;
  height: 1rem;
  flex: none;
  fill: currentColor;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(26rem, 0.98fr);
  align-items: center;
  gap: clamp(3rem, 7vw, 6.5rem);
  padding-block: 2rem 4rem;
}

.hero-copy {
  max-width: 38rem;
}

h1,
h2,
p {
  text-wrap: pretty;
}

h1 {
  margin: 0;
  color: var(--color-ink);
  font-size: clamp(3.25rem, 7.2vw, 6.3rem);
  font-weight: 700;
  line-height: 0.94;
  letter-spacing: -0.065em;
}

h1 span {
  display: block;
  color: var(--color-primary);
}

.intro {
  max-width: 36rem;
  margin: 1.75rem 0 0;
  color: var(--color-muted);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  line-height: 1.65;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.78rem 1.2rem;
  border: 1px solid var(--color-primary);
  border-radius: 0.55rem;
  color: var(--color-primary);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
}

.browser-icon {
  width: 1.25rem;
  height: 1.25rem;
  flex: none;
}

.button svg {
  width: 1.25rem;
  height: 1.25rem;
  flex: none;
  fill: currentColor;
}

.button:hover {
  border-color: var(--color-primary-hover);
  color: var(--color-primary-hover);
}

.button-primary {
  border-color: var(--color-accent);
  color: var(--color-on-accent);
  background: var(--color-accent);
}

.button-primary:hover {
  border-color: var(--color-accent-hover);
  color: var(--color-on-accent-hover);
  background: var(--color-accent-hover);
}

.button-secondary {
  background: var(--color-surface);
}

.requirement {
  margin: 1.25rem 0 0;
  color: var(--color-muted);
  font-size: 0.8rem;
  font-weight: 600;
}

.state-demo {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--color-browser);
  border-radius: 1rem;
  background: var(--color-browser);
}

.browser-bar {
  display: flex;
  height: 3.2rem;
  align-items: center;
  gap: 0.4rem;
  padding-inline: 1rem;
  border-bottom: 1px solid var(--color-browser-line);
}

.browser-bar > span {
  width: 0.62rem;
  height: 0.62rem;
  border-radius: 50%;
  background: var(--color-browser-dot);
}

.browser-bar > span:first-child {
  background: var(--color-accent);
}

.address-bar {
  flex: 1;
  margin-left: 0.7rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--color-browser-line);
  border-radius: 0.4rem;
  color: var(--color-browser-muted);
  font-size: 0.72rem;
}

.snapshot {
  margin: 1.1rem;
  padding: 1.1rem;
  border: 1px solid var(--color-browser-line);
  border-radius: 0.65rem;
  background: var(--color-browser-panel);
}

.snapshot-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.8rem;
  color: var(--color-browser-heading);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.snapshot-status {
  color: var(--color-browser-accent);
  font-size: 0.66rem;
}

.tab-list {
  display: grid;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tab {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.65rem;
  min-height: 2.5rem;
  padding-inline: 0.75rem;
  border: 1px solid var(--color-browser-tab-border);
  border-radius: 0.4rem;
  color: var(--color-browser-tab-text);
  background: var(--color-browser-tab);
  font-size: 0.78rem;
}

.tab-mark {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--color-browser-accent);
}

.tab-state {
  color: var(--color-browser-muted);
  font-size: 0.66rem;
  font-weight: 600;
}

.tab.unloaded {
  color: var(--color-browser-idle-text);
  background: transparent;
}

.tab.unloaded .tab-mark {
  border: 1px solid var(--color-browser-idle-border);
  background: transparent;
}

.restart-line {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-inline: 1.1rem;
  color: var(--color-browser-muted);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.restart-line::before,
.restart-line::after {
  height: 1px;
  flex: 1;
  background: var(--color-browser-line);
  content: "";
}

.snapshot-after {
  border-color: var(--color-browser-highlight);
}

figcaption {
  padding: 0 1.1rem 1.2rem;
  color: var(--color-browser-caption);
  font-size: 0.75rem;
  text-align: center;
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding-block: 2rem 3rem;
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: 0.8rem;
}

.footer-links {
  gap: 0.35rem;
}

footer p {
  margin: 0;
}

footer a {
  color: inherit;
  text-underline-offset: 0.18em;
}

.footer-credit {
  text-align: right;
}

a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

@media (max-width: 60rem) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    max-width: 44rem;
  }

  .state-demo {
    width: min(36rem, 100%);
    justify-self: center;
  }
}

@media (max-width: 44rem) {
  .site-shell {
    width: min(100% - 2rem, 74rem);
  }

  .site-header {
    min-height: 5.5rem;
  }

  .hero {
    gap: 3rem;
  }

  h1 {
    font-size: clamp(3rem, 15vw, 4.6rem);
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.75rem;
  }

  .footer-credit {
    text-align: left;
  }
}

@media (max-width: 28rem) {
  .brand span {
    max-width: 8rem;
    line-height: 1.15;
  }

  .actions {
    align-items: stretch;
    flex-direction: column;
  }

  .snapshot {
    margin-inline: 0.7rem;
    padding-inline: 0.7rem;
  }

  .tab {
    grid-template-columns: auto 1fr;
  }

  .tab-state {
    display: none;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .button {
    transition:
      color 180ms ease,
      background-color 180ms ease,
      border-color 180ms ease;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}