/*
 * The site's base styles: the app's paper-and-ink page and type (T1), and the global layout (T2): skip link, header with
 * its no-JS phone menu, footer, theme button, focus ring and reduced motion.
 */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* `hidden` always wins, also over a component's own display (the theme button until its script runs). */
[hidden] {
  display: none !important;
}

html {
  color-scheme: light;
  /* Anchors (/#features) clear the header if it is ever made sticky; it is not today. */
  scroll-padding-top: 5rem;
}

@media (prefers-color-scheme: dark) {
  html:not(.light) {
    color-scheme: dark;
  }
}

html.dark {
  color-scheme: dark;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  line-height: var(--text-sm--line-height);
  font-feature-settings: "kern";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2 {
  text-wrap: balance;
}

h1 {
  margin: 0 0 1rem;
  font-size: var(--text-display);
  line-height: var(--text-display--line-height);
  letter-spacing: var(--text-display--letter-spacing);
  font-weight: 600;
}

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

/* Links in running text are underlined: never told apart by colour alone. */
main a:not([class^="button-"]),
.footer-email {
  text-decoration-line: underline;
  text-underline-offset: 0.2em;
}

code,
kbd,
samp {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums slashed-zero;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* A focus anyone can see, on every interactive element. */
:where(a, button, summary, input, select, textarea, [tabindex]):focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0s !important;
    transition-delay: 0s !important;
    scroll-behavior: auto !important;
  }
}

/* ---------------------------------------------------------------------------------------------- layout */

.site-header-inner,
.site-footer-inner,
main {
  max-width: 1200px;
  margin: 0 auto;
  padding-inline: 24px;
}

main {
  padding-block: 48px;
}

.skip-link {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 20;
  padding: 8px 12px;
  border-radius: var(--radius);
  background: var(--primary);
  color: var(--primary-foreground);
  font-weight: 500;
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

/* The wordmark (web/src/components/wordmark.tsx): "Architect" semibold, "Hub" regular, one word. */
.wordmark {
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
  color: var(--foreground);
  text-decoration: none;
  user-select: none;
}

.wordmark-strong {
  font-weight: 600;
}

.wordmark-light {
  font-weight: 400;
}

.button-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: var(--radius);
  background: var(--primary);
  color: var(--primary-foreground);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}

.button-primary:hover {
  background: color-mix(in srgb, var(--primary) 88%, var(--foreground));
}

/* ---------------------------------------------------------------------------------------------- header */

.site-header {
  position: relative;
  border-bottom: 1px solid var(--border);
}

.site-header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 64px;
}

.site-nav {
  margin-left: auto;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-nav a:not(.button-primary),
.site-menu-panel a:not(.button-primary) {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--foreground);
  font-weight: 500;
  text-decoration: none;
}

.site-nav a:not(.button-primary):hover,
.site-menu-panel a:not(.button-primary):hover {
  color: var(--primary);
}

/* The phone menu: a <details>, so it opens with no JavaScript. Shown below 760px instead of the bar. */
.site-menu {
  display: none;
  margin-left: auto;
}

.site-menu summary {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  min-width: 44px;
  padding: 0 14px;
  border: 1px solid var(--input);
  border-radius: var(--radius);
  font-weight: 500;
  list-style: none;
  cursor: pointer;
  user-select: none;
}

.site-menu summary::-webkit-details-marker {
  display: none;
}

.site-menu summary::marker {
  content: "";
}

.site-menu[open] summary {
  background: var(--accent);
}

.site-menu-panel {
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  z-index: 10;
  padding: 8px 24px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--background);
}

.site-menu-panel ul {
  display: flex;
  flex-direction: column;
}

.site-menu-panel a:not(.button-primary) {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.site-menu-panel .button-primary {
  width: 100%;
  margin-top: 16px;
}

@media (max-width: 759px) {
  .site-nav {
    display: none;
  }

  .site-menu {
    display: block;
  }
}

/* ---------------------------------------------------------------------------------------------- footer */

.site-footer {
  border-top: 1px solid var(--border);
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 32px 48px;
  padding-block: 48px 32px;
}

.footer-brand p {
  max-width: 34ch;
  margin: 12px 0 0;
  color: var(--muted-foreground);
}

.footer-email {
  color: var(--foreground);
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 32px 48px;
}

.footer-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 16px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

.footer-group li + li {
  margin-top: 4px;
}

.footer-group a {
  display: inline-block;
  padding-block: 4px;
  color: var(--foreground);
  text-decoration: none;
}

.footer-group a:hover {
  color: var(--primary);
  text-decoration-line: underline;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-block: 16px 24px;
  border-top: 1px solid var(--border);
  color: var(--muted-foreground);
}

.footer-bottom p {
  margin: 0;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--input);
  border-radius: var(--radius);
  background: transparent;
  color: var(--foreground);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
}

.theme-toggle:hover {
  background: var(--accent);
}

@media (max-width: 759px) {
  .footer-main {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}