:root {
  --saturn-1: #ceb8b8;
  --saturn-2: #ead6b8;
  --saturn-3: #e3e0c0;
  --saturn-4: #bfbdaf;
  --saturn-5: #cecece;
  --bg-light: #fcfbf6;

  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --space-1: 0.35rem;
  --space-2: 0.6rem;
  --space-3: 0.9rem;
  --space-4: 1.2rem;
  --space-5: 1.6rem;
  --space-6: 2.2rem;

  --shadow-soft: 0 8px 24px rgb(0 0 0 / 8%);
  --shadow-focus: 0 0 0 3px rgb(206 184 184 / 55%);
}

:root,
:root[data-theme="light"] {
  --background: var(--bg-light);
  --background-elevated: #ffffff;
  --foreground: #21201d;
  --muted: #58544e;
  --border: #dcd6cb;
  --primary: #b79696;
  --primary-contrast: #1f1515;
  --link: #5d4f89;
  --sidebar-bg: #f7f4ed;
  --topbar-bg: rgb(252 251 246 / 82%);
  --toc-bg: rgb(255 255 255 / 80%);
  --code-bg: #171819;
  --code-fg: #e8ebf2;
  --inline-code-bg: #f1ece3;
  --admonition-bg: #f7f6f2;
  --table-stripe: #f6f2ea;
}

:root[data-theme="dark"] {
  --background: #171717;
  --background-elevated: #202020;
  --foreground: #f2eee5;
  --muted: #bbb3a7;
  --border: #37332f;
  --primary: #e3e0c0;
  --primary-contrast: #1f1f1a;
  --link: #cfbfec;
  --sidebar-bg: #1d1d1d;
  --topbar-bg: rgb(23 23 23 / 82%);
  --toc-bg: rgb(32 32 32 / 82%);
  --code-bg: #101113;
  --code-fg: #edf0f7;
  --inline-code-bg: #2a2520;
  --admonition-bg: #242321;
  --table-stripe: #242321;
  --shadow-soft: 0 10px 30px rgb(0 0 0 / 35%);
  --shadow-focus: 0 0 0 3px rgb(227 224 192 / 40%);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--background);
  color: var(--foreground);
}

body {
  font-family: "Gabarito", "Inter", "Segoe UI", sans-serif;
  line-height: 1.64;
  letter-spacing: 0.003em;
  position: relative;
}

.bg-orb {
  position: fixed;
  width: 34rem;
  height: 34rem;
  border-radius: 999px;
  filter: blur(54px);
  z-index: -1;
  opacity: 0.28;
  pointer-events: none;
}

.bg-orb-a {
  top: -12rem;
  right: -10rem;
  background: linear-gradient(145deg, var(--saturn-2), var(--saturn-1));
  animation: drift-a 16s ease-in-out infinite;
}

.bg-orb-b {
  bottom: -18rem;
  left: -8rem;
  background: linear-gradient(165deg, var(--saturn-3), var(--saturn-5));
  animation: drift-b 18s ease-in-out infinite;
}

@keyframes drift-a {
  0%,
  100% { transform: translate3d(0, 0, 0); }
  50% { transform: translate3d(-24px, 20px, 0); }
}

@keyframes drift-b {
  0%,
  100% { transform: translate3d(0, 0, 0); }
  50% { transform: translate3d(22px, -16px, 0); }
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
}

.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
  z-index: 1000;
  background: var(--background-elevated);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  backdrop-filter: saturate(130%) blur(10px);
  background: var(--topbar-bg);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  display: grid;
  grid-template-columns: auto 1fr minmax(220px, 380px) auto;
  gap: var(--space-3);
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.7rem 1rem;
}

.brand {
  font-weight: 800;
  color: var(--foreground);
  text-decoration: none;
  letter-spacing: 0.01em;
  font-size: 1.06rem;
}

.menu-toggle,
.theme-toggle,
.copy-button {
  border: 1px solid var(--border);
  background: var(--background-elevated);
  color: var(--foreground);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.65rem;
  cursor: pointer;
  font: inherit;
}

.search input {
  width: 100%;
  padding: 0.62rem 0.82rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  color: var(--foreground);
  background: var(--background-elevated);
  font: inherit;
}

.search input::placeholder {
  color: var(--muted);
}

.app-shell {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-5) var(--space-4);
  display: grid;
  grid-template-columns: minmax(220px, 290px) minmax(0, 1fr) minmax(180px, 260px);
  gap: var(--space-5);
}

.sidebar {
  background: var(--sidebar-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: var(--space-4);
  max-height: calc(100vh - 6rem);
  overflow: auto;
}

.nav-level {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-level-1,
.nav-level-2,
.nav-level-3 {
  margin-left: 0.85rem;
  padding-left: 0.85rem;
  border-left: 1px dashed var(--border);
}

.nav-link {
  display: block;
  text-decoration: none;
  color: var(--muted);
  border-radius: 8px;
  padding: 0.28rem 0.45rem;
  margin: 0.08rem 0;
}

.nav-item.active > .nav-link,
.nav-link:hover {
  color: var(--foreground);
  background: linear-gradient(120deg, rgb(206 184 184 / 20%), transparent 70%);
}

.content {
  min-width: 0;
}

.page-header h1 {
  font-size: clamp(1.8rem, 2vw + 1.1rem, 2.9rem);
  line-height: 1.18;
  margin: 0 0 var(--space-4);
  letter-spacing: -0.02em;
}

.prose {
  background: var(--background-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: clamp(1.1rem, 1.4vw, 2rem);
}

.prose h2,
.prose h3,
.prose h4 {
  scroll-margin-top: 6rem;
  letter-spacing: -0.01em;
}

.prose a {
  color: var(--link);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.14em;
}

.prose img {
  max-width: 100%;
  border-radius: var(--radius-md);
}

.prose ul,
.prose ol {
  margin: var(--space-3) 0 var(--space-4);
  padding-left: 1.4rem;
}

.prose ul {
  list-style: disc;
}

.prose ol {
  list-style: decimal;
}

.prose li {
  margin: 0.34rem 0;
  display: list-item;
}

.prose li > p {
  margin: 0.18rem 0;
}

.prose code,
.prose kbd,
.prose samp,
.prose pre,
.copy-button {
  font-family: "Victor Mono", "SFMono-Regular", Menlo, monospace;
}

.prose code {
  background: var(--inline-code-bg);
  color: var(--foreground);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 0.05rem 0.36rem;
  font-size: 0.56em;
  font-variant-ligatures: none;
}

.code-wrap {
  position: relative;
  margin: var(--space-4) 0;
}

.prose pre {
  background: var(--code-bg);
  color: var(--code-fg);
  border-radius: var(--radius-md);
  border: 1px solid rgb(255 255 255 / 8%);
  padding: 1rem;
  overflow: auto;
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 4%);
}

.prose pre code {
  background: transparent;
  border: 0;
  color: inherit;
  padding: 0;
  font-size: 0.58rem;
  font-variant-ligatures: none;
}

.copy-button {
  position: absolute;
  top: 0.7rem;
  right: 0.7rem;
  background: rgb(20 23 30 / 86%);
  color: #e6ebf7;
  border: 1px solid rgb(255 255 255 / 20%);
  font-size: 0.63rem;
}

.toc {
  position: relative;
}

.toc-card {
  position: sticky;
  top: 5.4rem;
  border: 1px solid var(--border);
  background: var(--toc-bg);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: var(--shadow-soft);
}

.toc-title {
  margin-top: 0;
  font-weight: 700;
}

.toc ul {
  margin: 0;
  padding-left: 1rem;
}

.toc li {
  margin: 0.3rem 0;
}

.toc li[data-depth="3"] {
  margin-left: 0.6rem;
  opacity: 0.92;
}

.toc a {
  color: var(--muted);
  text-decoration: none;
}

.toc a:hover {
  color: var(--foreground);
}

.prose .admonition {
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--admonition-bg);
  padding: var(--space-3) var(--space-4);
}

.prose .admonition-title {
  font-weight: 800;
  margin-top: 0;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-4) 0;
  border: 1px solid var(--border);
}

.prose th,
.prose td {
  border: 1px solid var(--border);
  padding: 0.56rem 0.7rem;
  text-align: left;
}

.prose tbody tr:nth-child(even) {
  background: var(--table-stripe);
}

.prose .tabbed-set,
.prose .tabbed-content,
.prose .tabbed-labels {
  border-color: var(--border);
}

.pager {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.pager-link {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--border);
  background: var(--background-elevated);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  color: var(--foreground);
}

.footer {
  border-top: 1px solid var(--border);
  margin-top: var(--space-6);
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  color: var(--muted);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
[tabindex="-1"]:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 1120px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    top: 4.2rem;
    left: 0.8rem;
    right: 0.8rem;
    transform: translateY(-130%);
    transition: transform 220ms ease;
    max-height: 65vh;
    z-index: 70;
  }

  .sidebar.open {
    transform: translateY(0);
  }

  .toc {
    display: none;
  }

  .topbar-inner {
    grid-template-columns: auto auto 1fr auto;
  }
}

@media (max-width: 760px) {
  .topbar-inner {
    grid-template-columns: auto 1fr auto;
  }

  .brand {
    justify-self: start;
  }

  .search {
    grid-column: 1 / -1;
    order: 10;
  }

  .app-shell {
    padding: var(--space-4) var(--space-3);
  }

  .prose {
    padding: var(--space-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* Pygments syntax highlighting */
.prose .codehilite { margin: var(--space-4) 0; }
.prose .codehilite pre { margin: 0; }
.prose .codehilite .hll { background-color: rgb(255 255 255 / 8%); }
.prose .codehilite .c,
.prose .codehilite .cm,
.prose .codehilite .c1,
.prose .codehilite .cs { color: #7f8aa1; font-style: italic; }
.prose .codehilite .k,
.prose .codehilite .kc,
.prose .codehilite .kd,
.prose .codehilite .kn,
.prose .codehilite .kp,
.prose .codehilite .kr,
.prose .codehilite .kt { color: #ff8ea1; }
.prose .codehilite .n,
.prose .codehilite .nb,
.prose .codehilite .nf,
.prose .codehilite .nn,
.prose .codehilite .nt { color: #d7deef; }
.prose .codehilite .s,
.prose .codehilite .sa,
.prose .codehilite .sb,
.prose .codehilite .sc,
.prose .codehilite .sd,
.prose .codehilite .s1,
.prose .codehilite .s2,
.prose .codehilite .se,
.prose .codehilite .sh,
.prose .codehilite .si,
.prose .codehilite .sx { color: #b7e59a; }
.prose .codehilite .m,
.prose .codehilite .mi,
.prose .codehilite .mf,
.prose .codehilite .il { color: #f2cc8f; }
.prose .codehilite .o,
.prose .codehilite .ow { color: #9dd6ff; }
.prose .codehilite .p { color: #c7d0e6; }
.prose .codehilite .err { color: #ff6b6b; border-bottom: 1px dotted #ff6b6b; }

:root[data-theme="light"] .prose .codehilite .c,
:root[data-theme="light"] .prose .codehilite .cm,
:root[data-theme="light"] .prose .codehilite .c1,
:root[data-theme="light"] .prose .codehilite .cs { color: #8b95aa; }
:root[data-theme="light"] .prose .codehilite .k,
:root[data-theme="light"] .prose .codehilite .kc,
:root[data-theme="light"] .prose .codehilite .kd,
:root[data-theme="light"] .prose .codehilite .kn,
:root[data-theme="light"] .prose .codehilite .kp,
:root[data-theme="light"] .prose .codehilite .kr,
:root[data-theme="light"] .prose .codehilite .kt { color: #ff9db0; }
:root[data-theme="light"] .prose .codehilite .n,
:root[data-theme="light"] .prose .codehilite .nb,
:root[data-theme="light"] .prose .codehilite .nf,
:root[data-theme="light"] .prose .codehilite .nn,
:root[data-theme="light"] .prose .codehilite .nt { color: #ecf1ff; }