opencode/packages/web/src/styles/custom.css

:root {
  --sl-color-bg: hsl(0, 20%, 99%);
  --sl-color-gray-5: hsl(0, 1%, 85%);
  --sl-nav-gap: 40px;
  --sl-color-text: hsl(0, 1%, 39%);
  --sl-border-color: hsl(0, 1%, 85%);
  --sl-color-hairline-shade: hsl(0, 1%, 85%);

  --color-background: hsl(0, 20%, 99%);
  --color-background-weak: hsl(0, 8%, 97%);
  --color-background-weak-hover: hsl(0, 8%, 94%);
  --color-background-strong: hsl(0, 5%, 12%);
  --color-background-strong-hover: hsl(0, 5%, 18%);
  --color-background-interactive: hsl(62, 84%, 88%);
  --color-background-interactive-weaker: hsl(64, 74%, 95%);

  --color-text: hsl(0, 1%, 39%);
  --color-text-weak: hsl(0, 1%, 60%);
  --color-text-weaker: hsl(0, 3%, 88%);
  --color-text-strong: hsl(0, 5%, 12%);
  --color-text-inverted: hsl(0, 20%, 99%);

  --color-border: hsl(30, 2%, 81%);
  --color-border-weak: hsl(0, 1%, 85%);

  --color-icon: hsl(0, 1%, 55%);

  /* For the share component */
  --sl-color-bg-surface: var(--sl-color-bg-nav);
  --sl-color-divider: var(--sl-color-gray-5);
}

body {
  color: var(--color-text) !important;
  font-size: 14px !important;

  @media (prefers-color-scheme: dark) {
    --sl-color-bg: hsl(0, 9%, 7%);
    --sl-color-gray-5: hsl(0, 4%, 23%);
    --sl-color-text: hsl(0, 4%, 71%);
    --sl-border-color: hsl(0, 4%, 23%);
    --sl-color-hairline-shade: hsl(0, 4%, 23%);

    --color-background: hsl(0, 9%, 7%);
    --color-background-weak: hsl(0, 6%, 10%);
    --color-background-strong: hsl(0, 15%, 94%);
    --color-background-strong-hover: hsl(0, 15%, 97%);
    --color-background-interactive: hsl(62, 100%, 90%);
    --color-background-interactive-weaker: hsl(60, 20%, 8%);

    --color-text: hsl(0, 4%, 71%);
    --color-text-weak: hsl(0, 2%, 49%);
    --color-text-weaker: hsl(0, 3%, 28%);
    --color-text-strong: hsl(0, 15%, 94%);
    --color-text-inverted: hsl(0, 9%, 7%);

    --color-border: hsl(0, 3%, 28%);
    --color-border-weak: hsl(0, 4%, 23%);

    --color-icon: hsl(10, 3%, 43%);
  }
}

.header:where(.astro-tcroauqe) {
  border-bottom: 1px solid var(--color-border-weak) !important;
}

.sl-markdown-content hr {
  border-bottom: 1px solid var(--color-border-weak) !important;
}

#starlight__on-this-page--mobile {
  border-bottom: 1px solid var(--color-border-weak) !important;
}

mobile-starlight-toc nav summary .toggle {
  opacity: 60% !important;
  text-decoration: none !important;
}

nav.sidebar summary svg.caret {
  color: var(--color-icon) !important;
}

/* Search button style overrides */
body > .page > header button[data-open-modal] > kbd {
  position: relative;
  display: flex;
  gap: 4px;
}
body > .page > header button[data-open-modal] > kbd > kbd {
  color: var(--color-icon) !important;
  font-size: 15px;
}
/* Make the Cmd (⌘) keystroke bigger */
body > .page > header button[data-open-modal][aria-keyshortcuts="Meta+K"] > kbd > kbd:first-child {
  font-size: 20px;
  line-height: 0.73;
}

.starlight-aside__title {
  flex: 0 0 auto;
  margin-top: 3px;
}

body > .page > .main-frame .main-pane > main > .content-panel + .content-panel {
  border-top: none !important;
}

body > .page > header a.site-title img {
  height: 2rem !important;
}

a {
  color: var(--color-text-strong) !important;
}

.page-description {
  color: var(--color-text) !important;
}

.right-sidebar {
  border-inline-start: none !important;
}

.sidebar-pane {
  border-inline-end: 1px solid var(--color-border-weak) !important;
}

.right-sidebar-panel {
  padding: 24px 0 !important;
  color: var(--color-text-weaker);
}

.sidebar-content {
  padding: 24px 0 !important;
}

a[aria-current="page"] {
  border-left: 2px solid var(--color-background-strong);
  background: var(--color-background-weak) !important;
  font-weight: 600 !important;
}

ul.top-level a[aria-current="page"] > span {
  color: var(--color-text-strong) !important;
}

#starlight__sidebar > div > sl-sidebar-state-persist > ul > li > details > summary {
  padding: 0 24px !important;
  margin-top: 20px !important;
}

#starlight__sidebar > div > sl-sidebar-state-persist > ul > li > details > summary:hover {
  background: var(--color-background-weak);
}

#starlight__sidebar > div > sl-sidebar-state-persist > ul > li > details > summary span {
  color: var(--color-text-strong) !important;
  font-weight: 600 !important;
}

.top-level li a {
  border-radius: 0;
  width: 100%;
  padding: 4px 24px !important;
}

.top-level li a:hover {
  background: var(--color-background-weak) !important;
}

.right-group {
  gap: 40px !important;
}

.social-icons {
  gap: 24px !important;
}

.social-icons a svg {
  height: 18px !important;
  width: 18px !important;
}

site-search > button {
  text-transform: none !important;
}

body > .page > header button[data-open-modal] {
  gap: 12px !important;
  background: var(--color-background-weak);
  border: 1px solid var(--color-border-weak) !important;
  padding: 6px 12px !important;
  border-radius: 4px;

  @media (prefers-color-scheme: dark) {
    background: var(--color-background-weak);
  }
}

body > .page > header button[data-open-modal] {
  background: var(--color-background-weaker);
}

site-search > button span {
  text-decoration: none !important;
}

.starlight-aside {
  display: flex;
  gap: 16px;
  align-items: start;

  .starlight-aside__content {
    margin-top: 0;
  }

  @media (max-width: 768px) {
    flex-direction: column;
    gap: 6px;
  }
}

site-search > button > kbd {
  font-size: 14px !important;
}

h1 a,
h2 a,
h3 a,
h4 a,
h5 a,
h6 a {
  color: var(--color-text-strong) !important;
}

h1 {
  font-size: 26px !important;
  text-transform: none !important;
  font-weight: 500 !important;
  color: var(--color-text-strong) !important;
}

h2 {
  font-size: 22px !important;
  text-transform: none !important;
  font-weight: 500 !important;
  color: var(--color-text-strong) !important;
}

h3 {
  font-size: 18px !important;
  text-transform: none !important;
  font-weight: 500 !important;
  color: var(--color-text-strong) !important;
}

h4 {
  font-size: 16px !important;
  text-transform: none !important;
  font-weight: 500 !important;
  color: var(--color-text-strong) !important;
}

strong {
  font-weight: 500 !important;
}

ul,
ol {
  list-style: none !important;
  padding: 0 !important;
}

.sl-markdown-content .tab > [role="tab"][aria-selected="true"] {
  border-color: var(--color-text-strong);
}

.social-icons a svg {
  color: var(--color-text-weak) !important;
}

.social-icons a svg:hover {
  color: var(--color-text-strong) !important;
}

body > .page > header,
:root[data-has-sidebar] body > .page > header {
  background: var(--color-background) !important;
  padding: 24px !important;
}

.sl-container {
  box-sizing: border-box !important;
  width: 100% !important;
}

.right-sidebar-panel nav,
.right-sidebar-panel h2,
.right-sidebar-panel ul,
.right-sidebar-panel li,
.right-sidebar-panel a {
  display: block;
  width: 100%;
}

.sl-container {
  max-width: 100% !important;
}

nav.sidebar .sl-container ul li a,
div.right-sidebar .sl-container ul li a {
  padding: 4px 24px !important;
  width: 100% !important;
  color: var(--color-text-weaker);
  opacity: 50%;
}

nav.sidebar .sl-container ul li a:hover,
div.right-sidebar .sl-container ul li a:hover {
  background: var(--color-background-weak);

  @media (prefers-color-scheme: dark) {
    background: var(--color-background-weak);
  }
}

nav.sidebar .sl-container ul li ul li,
div.right-sidebar .sl-container ul li ul li {
  padding: 4px 12px 0 12px !important;
}

nav.sidebar .sl-container ul li a[aria-current="true"],
div.right-sidebar .sl-container ul li a[aria-current="true"] {
  color: var(--color-text-strong) !important;
  opacity: 100%;
}

h2#starlight__on-this-page {
  font-size: 14px !important;
  color: var(--color-text-strong) !important;
  margin: 0 !important;
  font-weight: 400 !important;
  padding: 0 24px 12px 24px;
}

#starlight__on-this-page ul {
  color: var(--color-text-strong) !important;
  font-size: 16px !important;
}

.middle-group .links {
  color: var(--color-icon);
  text-decoration: none;
  text-transform: none;
  font-size: 16px;
  display: none !important;
}

.middle-group .links:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

nav.sidebar ul.top-level > li > details > summary .group-label > span {
  margin-top: 24px !important;
  color: var(--color-text-strong) !important;
  text-transform: none !important;
  font-weight: 500 !important;
}

.content-panel {
  padding: 2rem 3rem !important;

  @media (max-width: 768px) {
    padding: 1rem 1.5rem !important;
  }
}

.expressive-code {
  margin: 0.75rem 0 3rem 0 !important;
  border-radius: 6px;
}

.expressive-code figure {
  background: var(--color-background-weak) !important;
}

.expressive-code .frame {
  box-shadow: none;
}

@media (prefers-color-scheme: dark) {
  .shiki,
  .shiki span {
    color: var(--shiki-dark) !important;
    background-color: var(--shiki-dark-bg) !important;
    /* Optional, if you also want font styles */
    font-style: var(--shiki-dark-font-style) !important;
    font-weight: var(--shiki-dark-font-weight) !important;
    text-decoration: var(--shiki-dark-text-decoration) !important;
  }
}