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

html {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: var(--weight-regular);
  line-height: var(--line-height);
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-wrap: anywhere;
  background: var(--color-bg);
  color: var(--color-ink);
}

a {
  color: var(--color-primary);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 0.08em;
}

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

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

h1,
h2,
h3 {
  line-height: 1.25;
  font-weight: var(--weight-bold);
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-2);
}

h1 {
  font-size: var(--font-size-title);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

p {
  margin: 0 0 var(--space-3);
}

ul,
ol {
  margin: 0;
  padding: 0;
}

svg {
  flex-shrink: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -4rem;
  z-index: 30;
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface);
  border-radius: var(--radius-small);
  box-shadow: var(--shadow-raised);
}

.skip-link:focus {
  top: var(--space-2);
}

/* Header */

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: var(--space-2) var(--space-3);
  min-height: 3.75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--weight-bold);
  font-size: 1.1875rem;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  text-decoration: none;
  margin-right: auto;
  min-height: var(--touch);
}

.brand:hover {
  color: var(--color-ink);
}

.brand__mark {
  display: inline-grid;
  place-items: center;
  width: 2.125rem;
  height: 2.125rem;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

/* Navigation: in the header from 768 px, a bottom bar on phones. */

.site-nav ul {
  list-style: none;
  display: flex;
  gap: var(--space-1);
}

.site-nav a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: var(--touch);
  padding: 0 var(--space-3);
  border-radius: var(--radius-pill);
  color: var(--color-ink-soft);
  font-weight: var(--weight-medium);
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
}

.site-nav a:hover {
  color: var(--color-ink);
  background: var(--color-surface-soft);
}

.site-nav a[aria-current="page"] {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

@media (max-width: 767.98px) {
  body.has-nav {
    padding-bottom: calc(var(--nav-height) + env(safe-area-inset-bottom, 0px));
  }

  .site-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 20;
    background: var(--color-surface);
    border-top: 1px solid var(--color-line);
    box-shadow: 0 -4px 20px rgb(0 0 0 / 6%);
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }

  .site-nav ul {
    gap: 0;
    justify-content: space-around;
  }

  .site-nav li {
    flex: 1 1 0;
    min-width: 0;
  }

  .site-nav a {
    flex-direction: column;
    justify-content: center;
    gap: 0.125rem;
    height: var(--nav-height);
    padding: var(--space-1) 0.125rem;
    border-radius: 0;
    font-size: var(--font-size-tiny);
    line-height: 1.2;
    text-align: center;
    overflow-wrap: normal;
  }

  .site-nav a[aria-current="page"] {
    background: transparent;
  }

  .site-nav a[aria-current="page"] .nav-icon {
    background: var(--color-primary-soft);
  }

  .nav-icon {
    display: inline-grid;
    place-items: center;
    width: 3.25rem;
    height: 1.875rem;
    border-radius: var(--radius-pill);
    transition: background var(--transition);
  }
}

@media (min-width: 768px) {
  .site-header__inner {
    gap: var(--space-4);
  }

  .site-nav .nav-icon {
    display: none;
  }
}

/* Screen */

.screen {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-4) var(--space-3) var(--space-5);
}

.screen--wide {
  max-width: var(--wide-width);
}

.screen:focus {
  outline: none;
}

h1:focus {
  outline: none;
}

h1:focus-visible {
  outline: 3px solid var(--color-focus);
}

.muted {
  color: var(--color-ink-soft);
}

.small {
  font-size: var(--font-size-small);
}

/* Mock notice */

#notice-slot {
  position: sticky;
  top: 0;
  z-index: 25;
}

.mock-notice {
  background: var(--color-notice-bg);
  color: var(--color-notice-ink);
  border-bottom: 1px solid var(--color-line);
  font-size: var(--font-size-small);
}

.mock-notice__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-1) var(--space-3);
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: var(--space-1) var(--space-3);
}

.mock-notice__text {
  margin: 0;
  font-weight: var(--weight-medium);
}

.mock-notice__controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.mock-notice label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.mock-notice select,
.mock-notice button {
  font: inherit;
  font-size: var(--font-size-small);
  color: var(--color-notice-ink);
  background: transparent;
  border: 1px solid currentColor;
  border-radius: var(--radius-pill);
  min-height: 2rem;
  padding: 0 var(--space-3);
  cursor: pointer;
}

.mock-notice select option {
  color: #24302a;
  background: #ffffff;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}

/* Component display rules must not reveal elements marked hidden. */
[hidden] {
  display: none !important;
}

/* Focus moves to the heading after navigation for screen readers; it needs no ring. */
h1[tabindex="-1"]:focus {
  outline: none;
}

.brand,
.sign-out {
  white-space: nowrap;
  overflow-wrap: normal;
}

@media (max-width: 479.98px) {
  .sign-out__label,
  .mock-notice__label-text {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  .mock-notice {
    font-size: var(--font-size-tiny);
  }

  .mock-notice__inner {
    gap: var(--space-1);
  }

  .mock-notice__controls {
    flex-wrap: nowrap;
  }

  .mock-notice select {
    max-width: 10rem;
  }

  .mock-notice select,
  .mock-notice button {
    font-size: var(--font-size-tiny);
    padding: 0 var(--space-2);
  }
}