@import url("tokens.css");

/*
 * Shared BAS site styles: the site chrome (nav bar and footer), page
 * typography and the shared components. Every design value comes from
 * tokens.css through var(--bas-...). The import keeps pages that link only
 * this file working.
 */

html {
  background: var(--bas-bg);
  box-sizing: border-box;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    color-scheme: dark;
  }
}

html[data-theme="dark"] {
  color-scheme: dark;
}

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

body {
  background: var(--bas-bg);
  margin: 0;
}

body.bas-page {
  color: var(--bas-text);
  font-family: var(--bas-font-sans);
  font-size: var(--bas-text-md);
  line-height: var(--bas-leading-body);
}

body.bas-page--dark-tool {
  background: var(--bas-tool-bg);
}

body.bas-page--dark-tool,
body.bas-page--dark-tool .bas-page__main,
body.bas-page--dark-tool :where(.container-info, .container-main) {
  background: var(--bas-tool-bg);
  color: var(--bas-tool-text);
}

/* Site navigation bar. */

.bas-site-nav {
  background: var(--bas-nav-bg);
  border-bottom: 4px solid var(--bas-accent);
  color: var(--bas-nav-text);
  display: block;
  font-family: var(--bas-font-nav);
  line-height: 1.3;
  position: relative;
  z-index: 1000;
}

.bas-site-nav__inner {
  align-items: center;
  column-gap: var(--bas-space-4);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  margin: 0 auto;
  max-width: var(--bas-width-page);
  min-height: var(--bas-nav-h);
  padding: var(--bas-space-2) var(--bas-pad-page);
  row-gap: var(--bas-space-1);
}

.bas-site-nav__brand,
.bas-site-nav__links a {
  color: var(--bas-nav-text);
  text-decoration: none;
}

.bas-site-nav__brand {
  align-items: center;
  display: inline-flex;
  font-size: var(--bas-text-md);
  font-weight: var(--bas-weight-bold);
  gap: var(--bas-space-3);
  white-space: nowrap;
}

/* The BAS logo before the name (ST-77, ST-86). The stylesheet adds it, so
   every copy of the nav bar shows it. The logo file is 480 x 324. */
.bas-site-nav__brand::before {
  background: url("/files/bas_logo_black.png") no-repeat center / contain;
  content: "";
  flex: none;
  height: var(--bas-nav-logo-h);
  width: calc(var(--bas-nav-logo-h) * 1.48);
}

html[data-theme="dark"] .bas-site-nav__brand::before {
  background-image: url("/files/bas_logo_white.png");
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) .bas-site-nav__brand::before {
    background-image: url("/files/bas_logo_white.png");
  }
}

.bas-site-nav__links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--bas-space-1);
}

.bas-site-nav__links a {
  border-bottom: 2px solid transparent;
  display: inline-block;
  font-size: var(--bas-text-sm);
  padding: var(--bas-space-2) var(--bas-space-2) var(--bas-space-1);
}

.bas-site-nav__links a:hover,
.bas-site-nav__links a:focus {
  border-bottom-color: var(--bas-accent);
  color: var(--bas-nav-text);
}

.bas-site-nav__links a[aria-current="page"] {
  border-bottom-color: var(--bas-accent);
  color: var(--bas-nav-current);
}

.bas-site-nav .bas-site-nav__brand,
.bas-site-nav .bas-site-nav__links a {
  color: var(--bas-nav-text);
}

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

.bas-theme-toggle {
  align-items: center;
  background: transparent;
  border: 1px solid var(--bas-nav-control-border);
  border-radius: var(--bas-radius-pill);
  color: var(--bas-nav-text);
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  height: var(--bas-icon-button-sm);
  justify-content: center;
  line-height: 1;
  padding: 0;
  width: var(--bas-icon-button-sm);
}

.bas-theme-toggle:hover,
.bas-theme-toggle:focus {
  background: var(--bas-nav-control-hover-bg);
  border-color: var(--bas-accent);
  outline: none;
}

.bas-theme-toggle:focus-visible {
  box-shadow: var(--bas-shadow-focus-nav);
}

.bas-theme-toggle__icon {
  display: block;
  font-size: var(--bas-text-md);
  transform: translateY(-1px);
}

/* The "Menu" button (ST-84). bas-theme.js adds it and sets
   bas-site-nav--menu when the links do not fit in one row. */

.bas-site-nav__menu-button {
  display: none;
}

.bas-site-nav--menu .bas-site-nav__inner {
  align-items: center;
  display: flex;
  flex-direction: row;
  gap: var(--bas-space-3);
  position: relative;
}

.bas-site-nav--menu .bas-site-nav__menu-button {
  align-items: center;
  background: transparent;
  border: 1px solid var(--bas-nav-control-border);
  border-radius: var(--bas-radius-pill);
  color: var(--bas-nav-text);
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-size: var(--bas-text-sm);
  font-weight: var(--bas-weight-bold);
  gap: var(--bas-space-1);
  height: var(--bas-control-h-sm);
  margin-left: auto;
  padding: 0 var(--bas-control-px-sm);
}

.bas-site-nav--menu .bas-site-nav__menu-button::after {
  content: "\25BE";
}

.bas-site-nav--menu .bas-site-nav__menu-button:hover,
.bas-site-nav--menu .bas-site-nav__menu-button:focus {
  background: var(--bas-nav-control-hover-bg);
  border-color: var(--bas-accent);
  outline: none;
}

.bas-site-nav--menu .bas-site-nav__menu-button:focus-visible {
  box-shadow: var(--bas-shadow-focus-nav);
}

.bas-site-nav--menu .bas-theme-toggle {
  position: static;
}

.bas-site-nav--menu .bas-site-nav__links {
  display: none;
}

.bas-site-nav--menu.bas-site-nav--open .bas-site-nav__links {
  align-items: stretch;
  background: var(--bas-nav-bg);
  border: 1px solid var(--bas-rule);
  border-radius: var(--bas-radius-lg);
  box-shadow: var(--bas-shadow-menu);
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: var(--bas-space-1);
  min-width: var(--bas-toc-menu-w);
  padding: var(--bas-space-2);
  position: absolute;
  right: var(--bas-pad-page);
  top: 100%;
}

.bas-site-nav--menu.bas-site-nav--open .bas-site-nav__links a {
  border-bottom: 0;
  border-left: 3px solid transparent;
  font-size: var(--bas-text-md);
  padding: var(--bas-space-2) var(--bas-space-3);
}

.bas-site-nav--menu.bas-site-nav--open .bas-site-nav__links a[aria-current="page"] {
  border-left-color: var(--bas-accent);
}

/* Site footer. */

.bas-site-footer {
  border-top: 1px solid var(--bas-rule);
  color: var(--bas-muted);
  font-size: var(--bas-text-sm);
  margin: var(--bas-gap-section) 0 0;
  padding: var(--bas-gap-group) 0 0;
  text-align: right;
}

.bas-site-footer p {
  margin: 0 0 var(--bas-gap-tight);
}

.bas-site-footer a {
  color: var(--bas-link);
}

/* Page layout and typography. */

.bas-page__main {
  margin: 0 auto;
  max-width: var(--bas-width-text);
  padding: var(--bas-gap-section) var(--bas-pad-page) var(--bas-gap-page-end);
}

.bas-page--narrow .bas-page__main {
  max-width: var(--bas-width-narrow);
}

.bas-page--wide .bas-page__main,
.bas-page--tool .bas-page__main {
  max-width: var(--bas-width-page);
}

.bas-page--dark-tool .bas-page__main {
  margin: 0;
  max-width: none;
  padding: 0;
}

/* Bootstrap gives .container a fixed width (1170 px on wide screens).
   Inside the main column, which already sets the page width, that width
   overflows to the right and moves the content off centre (ST-76). Its
   side padding would also indent the content from the nav bar's edges. */
.bas-page:not(.bas-page--dark-tool) .bas-page__main .container {
  padding-left: 0;
  padding-right: 0;
  width: auto;
}

.bas-page :where(h1, h2, h3, h4) {
  color: var(--bas-heading);
  font-family: inherit;
  font-weight: var(--bas-weight-bold);
  line-height: var(--bas-leading-tight);
  margin: var(--bas-gap-heading) 0 var(--bas-space-3);
}

.bas-page :where(h1) {
  font-size: var(--bas-text-3xl);
  margin-top: 0;
}

.bas-page :where(h2) {
  border-bottom: 1px solid var(--bas-rule);
  font-size: var(--bas-text-2xl);
  padding-bottom: var(--bas-space-1);
}

.bas-page :where(h3) {
  font-size: var(--bas-text-xl);
}

.bas-page :where(p, ul, ol, dl, table, blockquote, pre) {
  margin-top: 0;
  margin-bottom: var(--bas-gap-flow);
}

.bas-page :where(ul, ol) {
  padding-left: var(--bas-space-5);
}

.bas-page :where(a) {
  color: var(--bas-link);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

.bas-page :where(a:hover, a:focus) {
  color: var(--bas-link-hover);
}

.bas-page :where(.btn) {
  border-radius: var(--bas-radius-md);
  font-weight: var(--bas-weight-medium);
  text-decoration: none;
}

.bas-page :where(.btn-primary) {
  background-color: var(--bas-button-bg);
  border-color: var(--bas-button-border);
  color: var(--bas-button-text);
}

.bas-page :where(.btn-primary:hover, .btn-primary:focus, .btn-primary:active) {
  background-color: var(--bas-button-hover-bg);
  border-color: var(--bas-button-border);
  color: var(--bas-button-text);
}

.bas-page :where(.btn-default) {
  background-color: var(--bas-button-secondary-bg);
  border-color: var(--bas-button-secondary-border);
  color: var(--bas-button-secondary-text);
}

.bas-page :where(.btn-default:hover, .btn-default:focus, .btn-default:active) {
  background-color: var(--bas-button-secondary-hover-bg);
  border-color: var(--bas-button-secondary-border);
  color: var(--bas-button-secondary-text);
}

.bas-page :where(img) {
  height: auto;
  max-width: 100%;
}

.bas-page :where(hr) {
  border: 0;
  border-top: 1px solid var(--bas-rule);
  margin: var(--bas-gap-section) 0;
}

.bas-page :where(code, pre) {
  font-family: var(--bas-font-mono);
}

.bas-page__main > :first-child {
  margin-top: 0;
}

/* Home page announcement banner. Shown by a script until its end date. */

/* Home page events (ST-79): the cards use the post card recipe. */

.bas-home-events {
  margin-bottom: var(--bas-gap-heading);
}

.bas-home-events__head {
  align-items: baseline;
  border-bottom: 1px solid var(--bas-rule);
  display: flex;
  gap: var(--bas-gap-related);
  justify-content: space-between;
  margin-bottom: var(--bas-gap-cards);
}

.bas-page .bas-home-events__head h2 {
  border: 0;
  margin: 0;
  padding: 0 0 var(--bas-space-2);
}

.bas-home-events__list {
  display: grid;
  gap: var(--bas-gap-cards);
  grid-template-columns: minmax(0, 1fr);
}

/* Event images show whole, at their own proportions (ST-83). */
.bas-event-card .bas-post-card__image-link {
  background: var(--bas-surface);
}

.bas-event-card .bas-post-card__image-link img {
  aspect-ratio: auto;
  height: auto;
  max-height: var(--bas-event-img-max-h);
  object-fit: contain;
}

/* Home page layout (ST-80): contents list, main content, events. */

.bas-home-layout {
  align-items: start;
  column-gap: var(--bas-gap-columns);
  display: grid;
  grid-template-areas: "main events";
  grid-template-columns: minmax(0, 1fr) var(--bas-events-w);
}

.bas-has-toc .bas-home-layout {
  grid-template-areas: "toc main events";
  grid-template-columns: var(--bas-toc-w) minmax(0, 1fr) var(--bas-events-w);
}

.bas-home-layout__toc {
  align-self: stretch;
  display: none;
  grid-area: toc;
}

.bas-has-toc .bas-home-layout__toc {
  display: block;
}

.bas-home-layout__main {
  grid-area: main;
}

.bas-home-layout__events {
  grid-area: events;
}

/* The main content is one column: the Bootstrap columns stack. */
.bas-home-layout__main .row {
  margin-left: 0;
  margin-right: 0;
}

.bas-home-layout__main .row > [class*="col-"] {
  float: none;
  padding-left: 0;
  padding-right: 0;
  width: auto;
}

.bas-home-layout__main .row > [class*="col-"] > h2:first-child {
  margin-top: 0;
}

.bas-home-layout__main .bas-home-text > [class*="col-"] {
  padding-bottom: var(--bas-gap-section);
}

/* Video and photo tiles keep a grid inside the column. */
.bas-home-layout__main .bas-home-tiles {
  display: grid;
  gap: var(--bas-gap-cards);
  grid-template-columns: repeat(auto-fill, minmax(var(--bas-toc-menu-w), 1fr));
  margin-bottom: var(--bas-gap-section);
}

.bas-home-layout__main .bas-home-tiles::before,
.bas-home-layout__main .bas-home-tiles::after {
  content: none;
}

.bas-home-social {
  margin-bottom: var(--bas-gap-section);
}

/* Contents list (ST-81, ST-82). bas-page-toc.js builds it and sets
   bas-has-toc on the body. */

.bas-page-toc {
  font-size: var(--bas-text-sm);
  pointer-events: auto;
  position: sticky;
  top: var(--bas-space-4);
}

.bas-page-toc__title {
  color: var(--bas-text);
  font-weight: var(--bas-weight-bold);
  margin: 0 0 var(--bas-space-2);
}

.bas-page-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.bas-page-toc__list li {
  line-height: var(--bas-leading-snug);
  margin: 0 0 var(--bas-gap-related);
}

.bas-page-toc__list a {
  color: var(--bas-link);
  text-decoration: none;
}

.bas-page-toc__list a:hover,
.bas-page-toc__list a:focus {
  color: var(--bas-link-hover);
  text-decoration: underline;
}

.bas-page-toc__button {
  display: none;
}

[data-bas-toc-root] :is(h1, h2) {
  scroll-margin-top: var(--bas-space-7);
}

/* On posts the list stands in a rail left of the article column. */
.bas-page-toc-wrap {
  position: relative;
}

.bas-page-toc-rail {
  bottom: 0;
  display: none;
  left: calc(50% - var(--bas-measure) / 2 - var(--bas-gap-columns) - var(--bas-toc-w));
  pointer-events: none;
  position: absolute;
  top: 0;
  width: var(--bas-toc-w);
}

.bas-has-toc .bas-page-toc-rail {
  display: block;
}

@media (max-width: 1099px) {
  .bas-home-layout,
  .bas-has-toc .bas-home-layout {
    grid-template-areas: "main events";
    grid-template-columns: minmax(0, 1fr) var(--bas-events-w-md);
  }

  /* The button shares the cell of the main content and stays at the top
     of the window while the content scrolls. */
  .bas-home-layout__toc {
    grid-area: main;
    pointer-events: none;
    position: relative;
    z-index: 5;
  }

  .bas-has-toc [data-bas-toc-root] {
    padding-top: var(--bas-space-7);
  }

  .bas-page-toc {
    top: var(--bas-space-2);
    width: max-content;
  }

  .bas-page-toc__title {
    display: none;
  }

  .bas-page-toc__button {
    align-items: center;
    background: var(--bas-surface);
    border: 1px solid var(--bas-muted);
    border-radius: var(--bas-radius-pill);
    box-shadow: var(--bas-shadow-card);
    color: var(--bas-text);
    cursor: pointer;
    display: inline-flex;
    font: inherit;
    font-size: var(--bas-text-sm);
    font-weight: var(--bas-weight-bold);
    gap: var(--bas-space-1);
    height: var(--bas-control-h-sm);
    padding: 0 var(--bas-control-px-sm);
  }

  .bas-page-toc__button::after {
    content: "\25BE";
  }

  .bas-page-toc__button:focus-visible {
    box-shadow: var(--bas-shadow-focus);
    outline: none;
  }

  .bas-page-toc__list {
    display: none;
  }

  .bas-page-toc--open .bas-page-toc__list {
    background: var(--bas-surface);
    border: 1px solid var(--bas-rule);
    border-radius: var(--bas-radius-lg);
    box-shadow: var(--bas-shadow-menu);
    display: block;
    margin-top: var(--bas-space-1);
    max-height: 70vh;
    min-width: var(--bas-toc-menu-w);
    overflow-y: auto;
    padding: var(--bas-space-2) var(--bas-space-4);
    position: absolute;
  }

  .bas-page-toc--open .bas-page-toc__list li {
    margin: 0;
  }

  .bas-page-toc--open .bas-page-toc__list a {
    display: block;
    font-size: var(--bas-text-md);
    padding: var(--bas-space-2) 0;
  }

  .bas-page-toc-rail {
    left: 50%;
    transform: translateX(-50%);
    width: min(var(--bas-measure), calc(100% - 2 * var(--bas-pad-page)));
    z-index: 5;
  }

  .bas-has-toc .bas-page-toc-wrap {
    padding-top: var(--bas-space-7);
  }
}

@media (max-width: 767px) {
  .bas-home-layout,
  .bas-has-toc .bas-home-layout {
    grid-template-areas: "events" "main";
    grid-template-columns: minmax(0, 1fr);
  }

  .bas-home-layout__events .bas-home-events {
    margin-bottom: var(--bas-gap-section);
  }

  /* Events are compact rows (ST-83). */
  .bas-post-card.bas-event-card {
    align-items: flex-start;
    flex-direction: row;
  }

  .bas-event-card .bas-post-card__image-link {
    flex: none;
    width: var(--bas-event-thumb-w);
  }

  .bas-event-card .bas-post-card__image-link img {
    max-height: var(--bas-event-thumb-max-h);
  }

  .bas-event-card .bas-post-card__body {
    padding: var(--bas-space-2) var(--bas-space-3);
  }

  .bas-event-card .bas-post-card__title {
    font-size: var(--bas-text-md);
    margin-bottom: 0;
  }

  .bas-event-card .bas-post-card__meta {
    margin-bottom: var(--bas-space-1);
  }

  .bas-event-card__venue {
    display: none;
  }
}

.bas-event-card__label {
  font-size: var(--bas-text-xs);
  font-weight: var(--bas-weight-bold);
  margin-bottom: var(--bas-space-1);
  text-transform: uppercase;
}

.bas-event-card__label--upcoming {
  color: var(--bas-link);
}

.bas-event-card__label--past {
  color: var(--bas-muted);
}

.bas-event-card__venue {
  color: var(--bas-muted);
  font-size: var(--bas-text-sm);
  margin: 0;
}

/* Media. */

.bas-lazy-media {
  background: var(--bas-code-bg);
}

.bas-video-embed {
  aspect-ratio: 16 / 9;
  border: 0;
  height: auto;
  max-width: 100%;
  width: 100%;
}

.bas-video-lite {
  aspect-ratio: 16 / 9;
  background: var(--bas-media-bg);
  border: 0;
  color: var(--bas-on-media);
  cursor: pointer;
  display: block;
  max-width: 100%;
  overflow: hidden;
  padding: 0;
  position: relative;
  width: 100%;
}

.bas-video-lite img {
  display: block;
  height: 100%;
  object-fit: cover;
  opacity: 0.86;
  width: 100%;
}

.bas-video-lite::before {
  background: var(--bas-media-play-bg);
  border-radius: var(--bas-radius-pill);
  content: "";
  height: var(--bas-video-play);
  left: 50%;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  transition: background 0.16s ease;
  width: var(--bas-video-play);
  z-index: 1;
}

.bas-video-lite::after {
  border-bottom: 12px solid transparent;
  border-left: 18px solid currentColor;
  border-top: 12px solid transparent;
  content: "";
  left: calc(50% + 3px);
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
}

.bas-video-lite:hover::before,
.bas-video-lite:focus::before {
  background: var(--bas-media-play-hover-bg);
}

/* Buttons. A size and a variant; the default variant is primary. */

.bas-button {
  align-items: center;
  background: var(--bas-button-bg);
  border: 1px solid var(--bas-button-border);
  border-radius: var(--bas-radius-md);
  color: var(--bas-button-text);
  display: inline-flex;
  font-size: var(--bas-text-sm);
  font-weight: var(--bas-weight-semibold);
  gap: var(--bas-gap-tight);
  line-height: var(--bas-leading-tight);
  min-height: var(--bas-control-h-sm);
  padding: 0 var(--bas-control-px-sm);
  text-decoration: none;
}

.bas-button:hover,
.bas-button:focus {
  background: var(--bas-button-hover-bg);
  color: var(--bas-button-text);
  text-decoration: none;
}

.bas-button--subtle {
  background: var(--bas-button-bg);
}

/* Page header and blog posts. */

.bas-page-header {
  border-bottom: 1px solid var(--bas-rule);
  margin-bottom: var(--bas-gap-section);
  padding-bottom: var(--bas-gap-group);
}

.bas-page-header h1 {
  margin-bottom: var(--bas-space-2);
}

.bas-page-header p {
  margin-bottom: 0;
  max-width: 64rem;
}

/* Topic links above the article list (AA-30 to AA-32). */
.bas-topic-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--bas-space-2) var(--bas-space-4);
  margin-bottom: var(--bas-space-4);
}

.bas-topic-links a[aria-current="page"] {
  font-weight: var(--bas-weight-bold);
  text-decoration: none;
}

.bas-wp-posts {
  margin: var(--bas-gap-flow) 0 var(--bas-space-6);
}

.bas-wp-posts__status {
  background: var(--bas-surface);
  border: 1px solid var(--bas-rule);
  border-radius: var(--bas-radius-md);
  color: var(--bas-text);
  margin: 0;
  padding: var(--bas-space-3) var(--bas-pad-card);
}

.bas-wp-posts__status--error {
  border-color: var(--bas-danger);
}

.bas-post-list {
  display: grid;
  gap: var(--bas-gap-cards);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.bas-post-list--compact {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.bas-post-card {
  background: var(--bas-surface);
  border: 1px solid var(--bas-rule);
  border-radius: var(--bas-radius-lg);
  box-shadow: var(--bas-shadow-card);
  display: flex;
  flex-direction: column;
  min-height: 100%;
  overflow: hidden;
}

.bas-post-card__image-link {
  background: var(--bas-code-bg);
  display: block;
}

.bas-post-card__image-link img {
  aspect-ratio: 16 / 9;
  display: block;
  object-fit: cover;
  width: 100%;
}

.bas-post-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: var(--bas-pad-card);
}

.bas-post-card__meta {
  color: var(--bas-muted);
  font-size: var(--bas-text-sm);
  margin-bottom: var(--bas-space-2);
}

.bas-post-card__title {
  border: 0;
  font-size: var(--bas-text-lg);
  margin: 0 0 var(--bas-space-2);
  padding: 0;
}

.bas-post-card__excerpt {
  flex: 1;
  font-size: var(--bas-text-md);
}

.bas-post-card .bas-button {
  align-self: flex-start;
  margin-top: var(--bas-gap-tight);
}

/* Pages from the legacy, historic and pages collections. */

.bas-page--legacy .bas-page__main {
  background: var(--bas-surface);
  box-shadow: var(--bas-shadow-card);
}

.bas-page--historic .bas-page__main {
  overflow-wrap: break-word;
}

.bas-page--historic :where(table) {
  max-width: 100%;
}

.bas-page--historic :where(iframe) {
  max-width: 100%;
}

.bas-page--pages,
.bas-page--pages :where(.wrapper, section) {
  background: var(--bas-bg);
  color: var(--bas-text);
  font-family: var(--bas-font-sans);
}

.bas-page--pages :where(.wrapper) {
  margin: 0 auto;
  max-width: var(--bas-width-text);
  padding: 0;
}

.bas-page--pages :where(.wrapper .wrapper) {
  max-width: none;
  padding: 0;
}

.bas-page--pages :where(section) {
  margin: 0;
  max-width: none;
  padding: 0;
}

.bas-page--pages :where(h1, h2, h3, h4, h5, h6) {
  color: var(--bas-heading);
  font-family: inherit;
  font-weight: var(--bas-weight-bold);
}

.bas-page--pages :where(a) {
  color: var(--bas-link);
  text-shadow: none;
}

.bas-page--pages :where(a:hover, a:focus) {
  color: var(--bas-link-hover);
}

.bas-page--pages :where(ul) {
  list-style-image: none;
}

.bas-page--pages :where(blockquote) {
  border-left-color: var(--bas-accent);
}

.bas-page--pages :where(th, td) {
  border-bottom-color: var(--bas-rule);
}

.bas-page--pages :where(code) {
  background: var(--bas-code-bg);
  color: var(--bas-text);
  text-shadow: none;
}

.bas-page--pages :where(pre) {
  background: var(--bas-pre-bg);
  border-color: var(--bas-rule);
  box-shadow: none;
}

/* Tool pages: one row of small controls. */

.bas-tool-control {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--bas-gap-related);
}

.bas-tool-control input,
.bas-tool-control button {
  font: inherit;
  min-height: var(--bas-control-h-sm);
}

.bas-tool-control input {
  background: var(--bas-control-bg);
  border: 1px solid var(--bas-control-border);
  border-radius: var(--bas-radius-sm);
  color: var(--bas-control-text);
  padding: 0 var(--bas-control-px-xs);
}

.bas-tool-control button {
  background: var(--bas-button-bg);
  border: 1px solid var(--bas-button-border);
  border-radius: var(--bas-radius-sm);
  color: var(--bas-button-text);
  padding: 0 var(--bas-control-px-sm);
}

/* Home page banner. */

.bas-page :where(.jumbotron) {
  background: var(--bas-jumbotron-bg);
  color: var(--bas-jumbotron-text);
}

/* Home page welcome banner (ST-75): no box, a rule under it. */

.bas-home-banner__inner {
  align-items: center;
  border-bottom: 1px solid var(--bas-rule);
  display: flex;
  gap: var(--bas-space-5);
  padding: var(--bas-space-6) 0 var(--bas-space-5);
}

.bas-home-banner__logo {
  flex: none;
  height: auto;
  width: var(--bas-logo-banner);
}

.bas-page .bas-home-banner__text {
  color: var(--bas-text);
  font-size: var(--bas-text-xl);
  font-weight: var(--bas-weight-regular);
  line-height: var(--bas-leading-body);
  margin: 0;
}

.bas-home-banner__welcome {
  display: block;
}

/* The page has one logo file for each theme (ST-86). */
.bas-home-banner__logo--on-dark {
  display: none;
}

html[data-theme="dark"] .bas-home-banner__logo--on-light {
  display: none;
}

html[data-theme="dark"] .bas-home-banner__logo--on-dark {
  display: block;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) .bas-home-banner__logo--on-light {
    display: none;
  }

  html:not([data-theme="light"]) .bas-home-banner__logo--on-dark {
    display: block;
  }
}

/* Phones. */

@media (max-width: 640px) {
  body.bas-page {
    line-height: var(--bas-leading-body);
  }

  .bas-page :where(h1) {
    font-size: var(--bas-text-2xl);
  }

  .bas-page :where(h2) {
    font-size: var(--bas-text-xl);
  }

  .bas-page :where(h3) {
    font-size: var(--bas-text-lg);
  }

  .bas-page :where(p, ul, ol, dl, table, blockquote, pre) {
    margin-bottom: var(--bas-space-3);
  }

  .bas-page :where(.jumbotron) {
    padding: var(--bas-gap-section) var(--bas-pad-page);
  }

  body.bas-page .jumbotron .col-md-10 {
    clear: both;
  }

  .bas-home-banner__inner {
    flex-direction: column;
    gap: var(--bas-space-3);
    text-align: center;
  }

  .bas-home-banner__logo {
    max-width: var(--bas-logo-phone);
  }

  .bas-page .bas-home-banner__text {
    font-size: var(--bas-text-md);
  }

  body.bas-page .jumbotron p {
    font-size: var(--bas-text-md);
    line-height: var(--bas-leading-body);
  }

  .bas-site-nav__inner {
    align-items: flex-start;
    display: flex;
    flex-direction: column;
    gap: var(--bas-space-1);
    min-height: 0;
    padding: var(--bas-space-2) var(--bas-pad-page);
    position: relative;
  }

  /* Phones: the logo only. The link is as wide as the logo and clips the
     name, which stays the link text for screen readers. */
  .bas-site-nav__brand {
    max-width: calc(var(--bas-nav-logo-h) * 1.48);
    overflow: hidden;
  }

  .bas-site-nav__links {
    gap: var(--bas-space-hairline);
  }

  .bas-site-nav__links a {
    font-size: var(--bas-text-sm);
    padding: var(--bas-space-1) var(--bas-space-2);
  }

  .bas-theme-toggle {
    position: absolute;
    right: var(--bas-space-3);
    top: var(--bas-space-2);
  }
}