/* Caspian docs — design system (matches the landing: Instrument Serif, #fc2c83). */
@import url("https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&display=swap");

:root {
  --sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", Inter, Roboto,
    system-ui, sans-serif;
  --serif: "Instrument Serif", Georgia, serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
  --pink: #fc2c83;
  --pink-2: #fd5299;
  --sidebar-w: 270px;
  --toc-w: 220px;
  --topbar-h: 56px;
}

:root,
:root[data-theme="dark"] {
  color-scheme: dark;
  --background: #08080a;
  --surface: #0c0c0f;
  --surface-2: #141418;
  --muted: #161619;
  --foreground: #fafafa;
  --muted-foreground: #9297a1;
  --faint-foreground: #6c7078;
  --border: #232327;
  --border-strong: #33333a;
  --code-bg: #0d0d11;
  --pink-soft: rgba(252, 44, 131, 0.14);
}

:root[data-theme="light"] {
  color-scheme: light;
  --background: #ffffff;
  --surface: #ffffff;
  --surface-2: #f7f7f8;
  --muted: #f4f4f5;
  --foreground: #09090b;
  --muted-foreground: #52525b;
  --faint-foreground: #71717a;
  --border: #e6e6e9;
  --border-strong: #d4d4d8;
  --code-bg: #f8f8fa;
  --pink-soft: rgba(252, 44, 131, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--topbar-h) + 20px);
}

body {
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--pink);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* ---- Top bar ---- */
.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 0 20px;
  background: color-mix(in srgb, var(--background) 82%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--foreground);
  flex: none;
}
.brand:hover {
  text-decoration: none;
}
.brand .orb {
  width: 24px;
  height: 24px;
  object-fit: contain;
  filter: drop-shadow(0 1px 6px rgba(252, 44, 131, 0.45));
  flex: none;
}
.topbar .docs-tag {
  color: var(--faint-foreground);
  font-size: 0.9rem;
  border-left: 1px solid var(--border);
  padding-left: 16px;
}
.topbar .spacer {
  flex: 1;
}
.topbar .tb-link {
  color: var(--muted-foreground);
  font-size: 0.92rem;
}
.topbar .tb-link:hover {
  color: var(--foreground);
  text-decoration: none;
}
.searchbtn {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 210px;
  height: 34px;
  padding: 0 10px 0 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface-2);
  color: var(--faint-foreground);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}
.searchbtn:hover {
  border-color: var(--border-strong);
}
.searchbtn .kbd {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--muted-foreground);
}
.iconbtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: transparent;
  color: var(--muted-foreground);
  cursor: pointer;
}
.iconbtn:hover {
  color: var(--foreground);
  border-color: var(--border-strong);
}
.iconbtn svg {
  width: 17px;
  height: 17px;
}
.menubtn {
  display: none;
}

/* ---- Layout ---- */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  max-width: 1500px;
  margin: 0 auto;
}

.sidebar {
  position: fixed;
  top: var(--topbar-h);
  bottom: 0;
  width: var(--sidebar-w);
  overflow-y: auto;
  padding: 26px 14px 60px 24px;
  border-right: 1px solid var(--border);
  background: var(--background);
}
.sidebar .group {
  margin-bottom: 22px;
}
.sidebar .group-title {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--faint-foreground);
  font-weight: 600;
  margin: 0 0 8px 8px;
}
.sidebar a {
  display: block;
  padding: 5px 10px;
  margin: 1px 0;
  border-radius: 7px;
  color: var(--muted-foreground);
  font-size: 0.9rem;
  line-height: 1.4;
}
.sidebar a:hover {
  color: var(--foreground);
  background: var(--muted);
  text-decoration: none;
}
.sidebar a.active {
  color: var(--pink);
  background: var(--pink-soft);
  font-weight: 500;
}

.main {
  grid-column: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--toc-w);
  gap: 48px;
  padding: calc(var(--topbar-h) + 26px) 44px 90px;
  max-width: 1180px;
}

.article {
  min-width: 0;
  max-width: 760px;
}

/* ---- On this page (TOC) ---- */
.toc {
  position: sticky;
  top: calc(var(--topbar-h) + 26px);
  align-self: start;
  height: fit-content;
  font-size: 0.85rem;
  border-left: 1px solid var(--border);
  padding-left: 18px;
}
.toc-title {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.7rem;
  color: var(--faint-foreground);
  font-weight: 600;
  margin-bottom: 10px;
}
.toc a {
  display: block;
  padding: 3px 0;
  color: var(--muted-foreground);
  line-height: 1.4;
}
.toc a.h3 {
  padding-left: 14px;
  font-size: 0.82rem;
}
.toc a:hover {
  color: var(--foreground);
  text-decoration: none;
}
.toc a.active {
  color: var(--pink);
}

/* ---- Article content ---- */
.eyebrow {
  color: var(--pink);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.article h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 2.9rem;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
}
.article .lead {
  font-size: 1.12rem;
  color: var(--muted-foreground);
  margin: 0 0 32px;
  line-height: 1.6;
}
.article h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.85rem;
  letter-spacing: -0.01em;
  margin: 46px 0 14px;
  padding-top: 6px;
  scroll-margin-top: calc(var(--topbar-h) + 20px);
}
.article h3 {
  font-size: 1.12rem;
  font-weight: 650;
  margin: 30px 0 10px;
  scroll-margin-top: calc(var(--topbar-h) + 20px);
}
.article p {
  margin: 14px 0;
}
.article ul,
.article ol {
  margin: 14px 0;
  padding-left: 22px;
}
.article li {
  margin: 6px 0;
}
.article strong {
  color: var(--foreground);
  font-weight: 650;
}
.anchor {
  color: var(--faint-foreground);
  opacity: 0;
  margin-left: 8px;
  font-weight: 400;
  transition: opacity 0.12s;
}
h2:hover .anchor,
h3:hover .anchor {
  opacity: 1;
}

/* inline code */
.article :not(pre) > code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--muted);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 5px;
  color: var(--foreground);
}

/* code blocks */
.codeblock {
  position: relative;
  margin: 18px 0;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--code-bg);
  overflow: hidden;
}
.codeblock .cb-head {
  display: flex;
  align-items: center;
  height: 38px;
  padding: 0 12px 0 16px;
  border-bottom: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--faint-foreground);
  font-family: var(--mono);
}
.codeblock pre {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.855rem;
  line-height: 1.6;
}
.codeblock code {
  font-family: var(--mono);
  color: var(--foreground);
}
.copybtn {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface-2);
  color: var(--muted-foreground);
  cursor: pointer;
  z-index: 2;
}
.codeblock .cb-head + pre .copybtn,
.codeblock .cb-head ~ .copybtn {
  top: 5px;
}
.copybtn:hover {
  color: var(--foreground);
  border-color: var(--border-strong);
}
.copybtn svg {
  width: 15px;
  height: 15px;
}
.copybtn.done {
  color: #34d399;
  border-color: #34d399;
}

/* language tabs */
.tabs {
  margin: 18px 0;
  border: 1px solid var(--border);
  border-radius: 11px;
  overflow: hidden;
  background: var(--code-bg);
}
.tabs .tabbar {
  display: flex;
  gap: 2px;
  padding: 6px 8px 0;
  border-bottom: 1px solid var(--border);
}
.tabs .tab {
  padding: 7px 14px;
  font: inherit;
  font-size: 0.84rem;
  color: var(--muted-foreground);
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  margin-bottom: -1px;
}
.tabs .tab.active {
  color: var(--foreground);
  border-bottom-color: var(--pink);
}
.tabs .panel {
  display: none;
}
.tabs .panel.active {
  display: block;
}
.tabs .panel .codeblock {
  margin: 0;
  border: 0;
  border-radius: 0;
}

/* callouts */
.callout {
  display: flex;
  gap: 12px;
  margin: 20px 0;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-left-width: 3px;
  border-radius: 9px;
  background: var(--surface);
  font-size: 0.94rem;
}
.callout .ico {
  flex: none;
  font-size: 1rem;
  line-height: 1.5;
}
.callout p {
  margin: 0;
}
.callout.note {
  border-left-color: var(--pink);
}
.callout.tip {
  border-left-color: #34d399;
}
.callout.warn {
  border-left-color: #f5a524;
}

/* tables */
.article table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.9rem;
  display: block;
  overflow-x: auto;
}
.article th,
.article td {
  text-align: left;
  padding: 9px 14px;
  border: 1px solid var(--border);
  vertical-align: top;
}
.article th {
  background: var(--muted);
  font-weight: 600;
}

/* cards grid (used on the intro) */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
  margin: 22px 0;
}
.card {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--foreground);
}
.card:hover {
  border-color: var(--border-strong);
  text-decoration: none;
  transform: translateY(-1px);
  transition: transform 0.12s;
}
.card .card-title {
  font-weight: 600;
  margin-bottom: 4px;
}
.card .card-desc {
  color: var(--muted-foreground);
  font-size: 0.88rem;
}

/* prev/next */
.pager {
  display: flex;
  gap: 14px;
  margin-top: 56px;
  padding-top: 26px;
  border-top: 1px solid var(--border);
}
.pager a {
  flex: 1;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 11px;
  color: var(--foreground);
}
.pager a:hover {
  border-color: var(--pink);
  text-decoration: none;
}
.pager .dir {
  font-size: 0.78rem;
  color: var(--faint-foreground);
}
.pager .ttl {
  font-weight: 600;
  color: var(--pink);
}
.pager .next {
  text-align: right;
}

/* pill badges */
.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 20px;
  vertical-align: middle;
}
.badge.free {
  color: #34d399;
  background: rgba(52, 211, 153, 0.12);
}
.badge.paid {
  color: var(--pink);
  background: var(--pink-soft);
}

/* ---- Search modal ---- */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(3px);
  padding-top: 12vh;
}
.search-overlay.open {
  display: block;
}
.search-modal {
  width: min(92vw, 600px);
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.search-modal input {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--border);
  background: transparent;
  color: var(--foreground);
  font: inherit;
  font-size: 1rem;
  padding: 16px 18px;
  outline: none;
}
.search-results {
  max-height: 56vh;
  overflow-y: auto;
  padding: 8px;
}
.search-results a {
  display: block;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--foreground);
}
.search-results a .r-sec {
  font-size: 0.75rem;
  color: var(--faint-foreground);
}
.search-results a.active,
.search-results a:hover {
  background: var(--pink-soft);
  text-decoration: none;
}
.search-empty {
  padding: 20px;
  color: var(--faint-foreground);
  font-size: 0.9rem;
  text-align: center;
}

/* ---- Responsive ---- */
@media (max-width: 1100px) {
  .main {
    grid-template-columns: minmax(0, 1fr);
  }
  .toc {
    display: none;
  }
}
@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.2s;
    z-index: 60;
    width: min(84vw, var(--sidebar-w));
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
  }
  body.nav-open .sidebar {
    transform: translateX(0);
  }
  .main {
    grid-column: 1;
    padding-left: 22px;
    padding-right: 22px;
  }
  .menubtn {
    display: inline-flex;
  }
  .searchbtn {
    min-width: 0;
  }
  .searchbtn .stxt,
  .searchbtn .kbd {
    display: none;
  }
  .topbar .docs-tag,
  .topbar .tb-link.hide-sm {
    display: none;
  }
  .nav-backdrop {
    position: fixed;
    inset: var(--topbar-h) 0 0 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 55;
    display: none;
  }
  body.nav-open .nav-backdrop {
    display: block;
  }
}
.article h1 {
  scroll-margin-top: calc(var(--topbar-h) + 20px);
}