:root {
  --page: #f7f6f2;
  --ink: #1a1a18;
  --muted: #5b5a54;
  --line: rgba(30, 30, 20, 0.14);
  --accent: #776c4d;
  --link: #014371;
  --white: #fbfeff;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  color: var(--ink);
  background: var(--page) url("../images/header.png") top center / 100% 18rem no-repeat;
  font-family: Lato, "Helvetica Neue", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--link);
  font-weight: 600;
}

a:hover {
  text-decoration: underline;
}

#root {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 3rem;
  padding: 0.5rem 1rem;
}

.header a {
  color: var(--white);
  text-decoration: none;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  font-size: 24px;
  font-weight: 600;
}

.logo-badge {
  padding: 2px 6px;
  border-radius: 4px;
  color: #fff;
  background: var(--accent);
  font-family: "DM Sans", sans-serif;
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.06em;
}

.header__navigation {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.header__navigation a {
  border-bottom: 1px solid transparent;
  font-size: 16px;
}

.header__navigation a:hover,
.header__navigation a[aria-current="page"] {
  border-bottom-color: currentColor;
}

.header-separator {
  width: 100%;
  margin: 0;
  border: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.8);
}

main {
  flex: 1;
  width: 100%;
  background: var(--page);
  padding: 1.5rem max(1rem, calc((100% - 960px) / 2)) 2.5rem;
}

.intro {
  max-width: 680px;
  margin-bottom: 1.5rem;
}

.eyebrow,
.section-label {
  margin: 0 0 0.5rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4 {
  line-height: 1.2;
}

h1 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
}

h2 {
  margin: 0 0 0.75rem;
  font-size: 1.45rem;
}

.lede {
  max-width: 640px;
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.about-tabs {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem;
  border-bottom: 1px solid var(--line);
}

.tab-button {
  flex: 0 0 auto;
  border: 0;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  padding: 0.65rem 0.8rem;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-size: 0.84rem;
  font-weight: 600;
}

.tab-button:hover,
.tab-button:focus-visible,
.tab-button.is-active {
  color: var(--ink);
  border-bottom-color: var(--accent);
  outline: none;
}

.tab-panel {
  max-width: 760px;
  min-height: 220px;
  padding: 1.5rem 0.25rem 0.5rem;
  font-size: 0.92rem;
}

.tab-panel p {
  margin: 0 0 0.8rem;
}

.tab-panel ul {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

.tab-panel code {
  padding: 0.12rem 0.3rem;
  background: rgba(30, 30, 20, 0.06);
  font-size: 0.9em;
}

.contributors-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.contributors-list li {
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.65);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.contributors-status {
  grid-column: 1 / -1;
  color: var(--muted);
  font-family: inherit !important;
}

footer {
  border-top: 1px solid var(--line);
  padding: 0.75rem 1rem;
  color: var(--muted);
  background: rgba(225, 225, 225, 0.9);
  font-size: 0.8rem;
  text-align: center;
}

footer p {
  margin: 0;
}

@media (max-width: 640px) {
  .header {
    align-items: flex-start;
    flex-direction: column;
  }

  main {
    padding-top: 1.25rem;
  }

  .tab-button {
    padding-right: 0.65rem;
    padding-left: 0.65rem;
  }
}