/* Only content-specific compatibility; Roadster controls the site layout. */
:root {
  --tsuru-accent: #b51f2e;
  --tsuru-accent-fill: #b51f2e;
  --tsuru-accent-hover: #941824;
  --tsuru-accent-on-fill: #fff;
}

html[data-theme="dark"] {
  --tsuru-accent: #ff8f9b;
  --tsuru-accent-fill: #c51f36;
  --tsuru-accent-hover: #a8182c;
}

body {
  font-size: 1rem;
}

.header {
  background-color: var(--color-surface);
  background-image: url("/images/top.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

html[data-theme="dark"] .header {
  background-image: linear-gradient(
    rgba(23, 26, 29, 0.82),
    rgba(23, 26, 29, 0.82)
  ), url("/images/top.png");
}

.menu-sticky {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--color-surface-alt);
  box-shadow: 0 2px 8px var(--color-shadow);
}

.menu-sticky .menu {
  position: relative;
  border-bottom: 3px solid var(--tsuru-accent);
}

.menu-sticky .menu__list,
.menu-sticky .menu__btn {
  color: var(--color-text);
  background: var(--color-surface-alt);
}

.menu-sticky .menu__item {
  border-color: var(--color-border-strong);
}

.menu-sticky .menu__link,
.menu-sticky .menu__link:hover {
  color: var(--color-text);
}

.menu-sticky .menu__item:hover {
  background: var(--tsuru-accent-fill);
}

.menu-sticky .menu__item:hover .menu__link {
  color: var(--tsuru-accent-on-fill);
}

.menu-sticky .menu__item--active {
  background: var(--tsuru-accent-fill);
}

.menu-sticky .menu__item--active .menu__link {
  color: var(--tsuru-accent-on-fill);
}

.menu-sticky .menu__btn:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: -3px;
}

.theme-toggle {
  min-width: 2.75rem;
  padding-inline: 0.625rem;
  font-size: 1.25rem;
}

h1,
.post__title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-text);
}

h2 {
  padding-bottom: 0.25rem;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-text);
  border-bottom: 2px solid var(--tsuru-accent);
}

h3 {
  color: var(--tsuru-accent);
}

.content a.cta-button {
  display: inline-block;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  color: var(--tsuru-accent-on-fill);
  background: var(--tsuru-accent-fill);
  font-weight: bold;
  text-decoration: none;
  border-radius: 0.375rem;
}

.content a.cta-button:hover,
.content a.cta-button:focus-visible {
  color: var(--tsuru-accent-on-fill);
  background: var(--tsuru-accent-hover);
}

.cta-button:focus-visible,
.start-button:focus-visible,
.form-container input:focus-visible,
.form-container textarea:focus-visible,
.form-container button:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.info-box {
  float: right;
  clear: right;
  width: min(32%, 21rem);
  padding: 0.75rem 0.875rem;
  margin: 0.25rem 0 1rem 1.25rem;
  font-size: 0.9rem;
  color: var(--color-text);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border-strong);
  border-left: 4px solid var(--tsuru-accent);
  border-radius: 0.5rem;
  box-shadow: 2px 2px 5px var(--color-shadow);
}

.info-box h4 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  text-align: center;
}

.info-box ul,
.info-box ol {
  padding-left: 1.25rem;
  margin: 0;
}

.info-box li + li {
  margin-top: 0.25rem;
}

@media screen and (max-width: 767px) {
  .info-box {
    float: none;
    width: auto;
    margin: 1rem 0;
    font-size: 1rem;
  }
}

.responsive-image {
  max-width: 100%;
  height: auto;
}

.start-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0 2rem;
}

.start-button {
  display: inline-block;
  padding: 0.75rem 1.125rem;
  font-weight: 700;
  text-decoration: none;
  border: 2px solid var(--tsuru-accent-fill);
  border-radius: 0.5rem;
}

.start-button-primary,
.form-container button[type="submit"],
.btn-submit {
  color: var(--tsuru-accent-on-fill);
  background: var(--tsuru-accent-fill);
}

.start-button-primary:hover,
.start-button-primary:focus-visible,
.form-container button[type="submit"]:hover,
.form-container button[type="submit"]:focus-visible,
.btn-submit:hover,
.btn-submit:focus-visible {
  color: var(--tsuru-accent-on-fill);
  background: var(--tsuru-accent-hover);
}

.start-button-secondary {
  color: var(--color-text);
  background: var(--color-surface);
}

.start-button-secondary:hover,
.start-button-secondary:focus-visible {
  color: var(--color-text);
  background: var(--color-surface-alt);
}

.form-container {
  max-width: 760px;
  padding: 1.125rem;
  margin-bottom: 1.5rem;
  color: var(--color-text);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border-strong);
  border-radius: 0.75rem;
}

.input-group {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.375rem;
  margin-bottom: 0.875rem;
}

.form-label {
  font-weight: 600;
}

.form-container input[type="text"],
.form-container input[type="email"],
.form-container textarea {
  width: 100%;
  padding: 0.5625rem 0.625rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: 0.375rem;
  font: inherit;
}

.form-container textarea {
  min-height: 8em;
  resize: vertical;
}

.checkbox-group {
  padding: 0.75rem;
  margin: 0.875rem 0;
  background: var(--color-surface);
  border-radius: 0.625rem;
}

.checkbox-group > strong {
  display: block;
  margin-bottom: 0.5rem;
}

.checkbox-group label {
  display: flex;
  align-items: flex-start;
  gap: 0.7em;
  margin: 0.5rem 0;
  font-weight: 400;
}

.checkbox-group input {
  flex: 0 0 auto;
  margin-top: 0.25em;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-top: 0.75rem;
}

.form-container button[type="submit"],
.btn-submit {
  padding: 0.6875rem 1rem;
  font-weight: 700;
  cursor: pointer;
  border: 0;
  border-radius: 0.5rem;
}

.form-note {
  max-width: 520px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

html[data-theme="dark"] .form-container {
  border-color: var(--color-input-hover);
}

html[data-theme="dark"] .form-container input[type="text"],
html[data-theme="dark"] .form-container input[type="email"],
html[data-theme="dark"] .form-container textarea {
  background: var(--color-bg-body);
  border-color: var(--color-input-hover);
}

/* Roadster compiles its highlight color at build time. Reapply it through
 * site-owned theme variables so the accent also follows the theme toggle. */
a:hover,
.logo__tagline,
.js .menu__btn--active,
.meta a:hover,
.content a,
.content a:hover,
.warning a,
.warning a:hover,
.authorbox__description a,
.authorbox__description a:hover,
.widget__link,
.toc__menu a {
  color: var(--tsuru-accent);
}

.toc__menu a:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: -3px;
}

blockquote {
  border-left-color: var(--tsuru-accent);
}

.divider,
.btn:hover,
.theme-toggle:hover,
.tags__item:hover,
.tags__badge,
.pagination__item:hover,
.pagination__item--current,
input[type="submit"]:hover,
input[type="reset"]:hover,
.widget-languages__link:hover .widget-languages__link-btn,
.submenu__link:hover {
  background: var(--tsuru-accent-fill);
}

.pagination__item:hover,
.pagination__item--current,
.tags__badge,
.widget-languages__link:hover .widget-languages__link-btn,
.submenu__link:hover {
  color: var(--tsuru-accent-on-fill);
}

.widget__title {
  border-bottom-color: var(--tsuru-accent);
}

@media screen and (min-width: 767px) {
  .menu {
    border-bottom-color: var(--tsuru-accent);
  }
}