:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --ink: #202124;
  --muted: #5f6368;
  --line: #dadce0;
  --accent: #c2410c;
  --accent-soft: #fff1e8;
  --focus: #1a56db;
  --radius: 12px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

a {
  color: var(--accent);
}

.wrap {
  max-inline-size: 720px;
  margin-inline: auto;
  padding-block: 3rem;
  padding-inline: 1.25rem;
}

h1 {
  margin-block: 0 0.25rem;
  font-size: clamp(1.6rem, 4vw, 2.25rem);
}

.intro {
  margin-block: 0 2rem;
  color: var(--muted);
}

.mode {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin: 0 0 1.5rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.mode legend {
  padding-inline: 0.35rem;
  font-weight: 600;
}

.mode label {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.4rem;
  cursor: pointer;
}

.mode input {
  accent-color: var(--accent);
}

.mode-hint {
  color: var(--muted);
  font-size: 0.85rem;
}

.tab-list {
  display: flex;
  gap: 0.25rem;
  overflow-x: auto;
  scrollbar-width: thin;
  margin: 0;
  padding: 0;
  border-block-end: 1px solid var(--line);
  list-style: none;
}

.tab {
  transition: background-color 150ms, color 150ms;
  position: relative;
  display: block;
  padding-block: 0.75rem;
  padding-inline: 1.1rem;
  border-radius: 8px 8px 0 0;
  color: var(--muted);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

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

.tab[aria-selected="true"] {
  color: var(--accent);
}

.tab[aria-selected="true"]::after {
  content: "";
  position: absolute;
  inset-inline: 0.5rem;
  inset-block-end: -1px;
  block-size: 3px;
  border-radius: 3px 3px 0 0;
  background: var(--accent);
}

.tab:focus-visible {
  outline-offset: -3px;
}

.tab-panel[hidden] {
  display: none;
}

.tab-panel {
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-block-start: 0;
  border-radius: 0 0 var(--radius) var(--radius);
  background: var(--surface);
}

.tab-panel:not([hidden]) {
  animation: panel-in 200ms ease-out;
}

.tab-panel h2 {
  margin-block: 0 0.75rem;
  font-size: 1.2rem;
}

.tab-panel p:last-child {
  margin-block-end: 0;
}

.specs {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.5rem 1.5rem;
  margin: 0;
}

.specs dt {
  color: var(--muted);
}

.specs dd {
  margin: 0;
}

blockquote {
  margin: 0 0 1rem;
  padding-block: 0.25rem;
  padding-inline-start: 1rem;
  border-inline-start: 3px solid var(--accent-soft);
}

blockquote p {
  margin: 0;
}

blockquote footer {
  color: var(--muted);
  font-size: 0.9rem;
}

@keyframes panel-in {
  from {
    opacity: 0;
  }
}

@media (max-width: 480px) {
  .wrap {
    padding-block: 2rem;
  }

  .tab {
    padding-inline: 0.8rem;
  }

  .tab-panel {
    padding: 1.1rem;
  }

  .specs {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .specs dd {
    margin-block-end: 0.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tab {
    transition: none;
  }

  .tab-panel:not([hidden]) {
    animation: none;
  }
}