/* ============================================
   libasciidoc — static site theme
   ============================================ */

:root {
  /* Typography */
  --font-heading: "Bricolage Grotesque", system-ui, -apple-system, sans-serif;
  --font-body: "Lexend", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  --font-size: 16px;
  --line-height: 1.75;

  /* Colors */
  --color-text: #2d2d3a;
  --color-text-muted: #64647a;
  --color-heading: #1a1a2e;
  --color-link: #2563eb;
  --color-link-hover: #1d4ed8;
  --color-bg: #fafaf9;
  --color-bg-subtle: #f2f1ef;
  --color-border: #dddcd8;

  /* Sidebar */
  --color-nav-bg: #16162a;
  --color-nav-text: #8b8da0;
  --color-nav-link: #c1c3d4;
  --color-nav-link-hover: #fff;
  --color-nav-active: #818cf8;
  --color-nav-section-active: #e2e3ed;

  /* Code */
  --color-code-bg: #f0efeb;
  --color-code-border: #dddcd8;
  --color-code-text: #2d2d3a;
  --color-inline-code-bg: #edecea;
  --color-inline-code-text: #7c3aed;

  /* Admonitions */
  --color-note: #3b82f6;
  --color-tip: #10b981;
  --color-warning: #f59e0b;
  --color-caution: #ef4444;
  --color-important: #8b5cf6;

  /* Layout */
  --nav-width: 260px;
  --content-max-width: 780px;
}

/* ---- Reset & Base ---- */

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

html {
  font-size: var(--font-size);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  font-family: var(--font-body);
  line-height: var(--line-height);
  color: var(--color-text);
  background: var(--color-bg);
}

::selection {
  background: rgba(129, 140, 248, 0.18);
  color: var(--color-heading);
}

/* ---- Layout ---- */

.site-layout {
  display: flex;
  min-height: 100vh;
}

nav {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--nav-width);
  background: var(--color-nav-bg);
  color: var(--color-nav-text);
  overflow-y: auto;
  padding: 1.5rem 0;
  z-index: 100;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.12) transparent;
}

nav::-webkit-scrollbar { width: 5px; }
nav::-webkit-scrollbar-track { background: transparent; }
nav::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.12);
  border-radius: 3px;
}

main {
  margin-left: var(--nav-width);
  flex: 1;
  padding: 2.5rem 3rem;
  max-width: calc(var(--content-max-width) + 6rem);
}

/* ---- Mobile Nav Toggle ---- */

.nav-toggle-input {
  display: none;
}

.nav-toggle-label {
  display: none;
  position: fixed;
  top: 0.85rem;
  left: 0.85rem;
  z-index: 200;
  width: 2.25rem;
  height: 2.25rem;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  background: var(--color-nav-bg);
  border-radius: 6px;
  padding: 0.5rem;
  border: 1px solid rgba(255,255,255,0.1);
}

.nav-toggle-label span {
  display: block;
  width: 16px;
  height: 2px;
  background: #fff;
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}

/* ---- Navigation ---- */

.site-title {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  padding: 0 1.25rem 1.25rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 1rem;
}

.site-title a {
  color: inherit;
  text-decoration: none;
}

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

nav > ul {
  padding: 0 0.5rem;
}

nav li {
  margin: 0;
}

nav a {
  display: block;
  padding: 0.3rem 0.75rem;
  color: var(--color-nav-link);
  text-decoration: none;
  font-size: 0.85rem;
  border-radius: 4px;
  transition: color 0.15s, background 0.15s;
}

nav a:hover {
  color: var(--color-nav-link-hover);
  background: rgba(255,255,255,0.06);
  text-decoration: none;
}

/* Top-level section headers */
nav > ul > li > a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-nav-text);
  padding: 0.5rem 0.75rem 0.25rem;
  margin-top: 0.75rem;
  border-radius: 0;
}

nav > ul > li:first-child > a {
  margin-top: 0;
}

/* Active section header (parent of active child) */
nav > ul > li.active > a {
  color: var(--color-nav-section-active);
}

/* Active leaf page */
nav ul ul li.active > a {
  color: var(--color-nav-active);
  font-weight: 600;
  background: rgba(129, 140, 248, 0.08);
}

/* Nested nav indentation */
nav ul ul {
  padding-left: 0.5rem;
  margin: 0.15rem 0 0.5rem 0.75rem;
  border-left: 1px solid rgba(255,255,255,0.08);
}

/* ---- Typography ---- */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-heading);
  font-weight: 700;
  line-height: 1.3;
  margin-top: 2.25rem;
  margin-bottom: 0.75rem;
}

h1 {
  font-size: 2rem;
  margin-top: 0;
  letter-spacing: -0.03em;
}

h2 {
  font-size: 1.45rem;
  letter-spacing: -0.02em;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
}

h3 {
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}

h4 { font-size: 1.05rem; }
h5 { font-size: 0.95rem; }

h6 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

p {
  margin: 0 0 1rem;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color 0.15s;
}

a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-link);
  outline-offset: 2px;
  border-radius: 2px;
}

strong { font-weight: 700; }

/* ---- Sections ---- */

.sect1 {
  margin-bottom: 2rem;
}

.sect1 + .sect1 {
  padding-top: 0.5rem;
}

.sectionbody {
  margin-top: 0.5rem;
}

/* ---- Inline Code ---- */

code {
  font-family: var(--font-mono);
  font-size: 0.84em;
  background: var(--color-inline-code-bg);
  color: var(--color-inline-code-text);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-weight: 500;
}

pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-weight: 400;
}

/* ---- Code Blocks ---- */

.listingblock,
.literalblock {
  margin-bottom: 1.25rem;
}

.listingblock > .title,
.literalblock > .title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
  font-style: normal;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.listingblock .content pre,
.literalblock .content pre {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  background: var(--color-code-bg);
  border: 1px solid var(--color-code-border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  color: var(--color-code-text);
  margin: 0;
}

/* Links inside code blocks should look like code, not links */
pre a,
.listingblock a,
.literalblock a {
  color: inherit;
  text-decoration: none;
}

pre a:hover,
.listingblock a:hover,
.literalblock a:hover {
  text-decoration: underline;
}

/* ---- Admonitions ---- */

.admonitionblock {
  margin-bottom: 1.25rem;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.admonitionblock > table {
  width: 100%;
  border-collapse: collapse;
}

.admonitionblock > table td {
  border: none;
}

.admonitionblock td.icon {
  width: 4rem;
  text-align: center;
  vertical-align: top;
  padding: 1rem 0.5rem 1rem 1rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.admonitionblock td.content {
  padding: 1rem 1rem 1rem 0.5rem;
  vertical-align: top;
}

.admonitionblock td.content > :last-child {
  margin-bottom: 0;
}

.admonitionblock.note     { border-left: 4px solid var(--color-note); }
.admonitionblock.note td.icon { color: var(--color-note); }

.admonitionblock.tip      { border-left: 4px solid var(--color-tip); }
.admonitionblock.tip td.icon  { color: var(--color-tip); }

.admonitionblock.warning  { border-left: 4px solid var(--color-warning); }
.admonitionblock.warning td.icon { color: var(--color-warning); }

.admonitionblock.caution  { border-left: 4px solid var(--color-caution); }
.admonitionblock.caution td.icon { color: var(--color-caution); }

.admonitionblock.important { border-left: 4px solid var(--color-important); }
.admonitionblock.important td.icon { color: var(--color-important); }

/* ---- Tables ---- */

.tableblock {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
}

.tableblock caption.title {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-style: normal;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
  caption-side: top;
}

.tableblock th.tableblock,
.tableblock td.tableblock {
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--color-border);
  vertical-align: top;
}

.tableblock th.tableblock {
  background: var(--color-bg-subtle);
  font-weight: 600;
  text-align: left;
  font-size: 0.85rem;
}

/* Table alignment classes */
.halign-left { text-align: left; }
.halign-center { text-align: center; }
.halign-right { text-align: right; }
.valign-top { vertical-align: top; }
.valign-middle { vertical-align: middle; }
.valign-bottom { vertical-align: bottom; }

.tableblock.frame-none,
.tableblock.frame-none th,
.tableblock.frame-none td {
  border: none;
}

.tableblock.grid-none th,
.tableblock.grid-none td {
  border: none;
}

.tableblock.grid-rows th,
.tableblock.grid-rows td {
  border-left: none;
  border-right: none;
}

.tableblock.stripes-odd tbody tr:nth-child(odd) td {
  background: var(--color-bg-subtle);
}

.tableblock.stripes-even tbody tr:nth-child(even) td {
  background: var(--color-bg-subtle);
}

.tableblock.stretch {
  width: 100%;
}

/* ---- Block Quotes ---- */

.quoteblock {
  margin: 0 0 1.25rem;
  padding: 0;
}

.quoteblock blockquote {
  margin: 0;
  padding: 0.85rem 1.25rem;
  border-left: 3px solid var(--color-link);
  color: var(--color-text-muted);
  font-style: italic;
  background: var(--color-bg-subtle);
  border-radius: 0 8px 8px 0;
}

.quoteblock blockquote p {
  margin-bottom: 0.5rem;
}

.quoteblock .attribution {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
  padding-left: 1.25rem;
}

/* ---- Sidebar ---- */

.sidebarblock {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.sidebarblock > .content > .title {
  font-family: var(--font-heading);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

/* ---- Example Blocks ---- */

.exampleblock {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.exampleblock > .title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-style: normal;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

/* ---- Lists ---- */

.ulist ul,
.olist ol {
  padding-left: 1.5rem;
  margin: 0 0 1rem;
}

.ulist li,
.olist li {
  margin-bottom: 0.35rem;
}

.ulist li p,
.olist li p {
  margin-bottom: 0.25rem;
}

/* Description lists */

.dlist dl {
  margin: 0 0 1rem;
}

.dlist dt.hdlist1 {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.9em;
  margin-top: 0.85rem;
  color: var(--color-heading);
}

.dlist dd {
  margin-left: 1.5rem;
  margin-bottom: 0.25rem;
}

.dlist dd p {
  margin-bottom: 0.25rem;
}

/* Checklist */

ul.checklist {
  list-style: none;
  padding-left: 1rem;
}

/* ---- Table of Contents ---- */

#toc {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
}

#toctitle {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
  color: var(--color-heading);
}

#toc ul {
  list-style: none;
  padding-left: 1rem;
  margin: 0;
}

#toc > ul {
  padding-left: 0;
}

#toc li {
  margin: 0.25rem 0;
}

#toc a {
  color: var(--color-text);
  font-size: 0.88rem;
  transition: color 0.15s;
}

#toc a:hover {
  color: var(--color-link);
  text-decoration: none;
}

/* ---- Preamble ---- */

#preamble .sectionbody {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1rem;
  margin-bottom: 0.5rem;
}

/* ---- Footer ---- */

.site-footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
  .nav-toggle-label {
    display: flex;
  }

  nav {
    left: -100%;
    width: 80%;
    max-width: 300px;
    transition: left 0.25s ease;
    padding-top: 3.5rem;
  }

  .nav-toggle-input:checked ~ nav {
    left: 0;
    box-shadow: 4px 0 24px rgba(0,0,0,0.3);
  }

  /* Hamburger -> X animation */
  .nav-toggle-input:checked ~ .nav-toggle-label span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
  }
  .nav-toggle-input:checked ~ .nav-toggle-label span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle-input:checked ~ .nav-toggle-label span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  main {
    margin-left: 0;
    padding: 1.5rem;
    padding-top: 4rem;
  }

  .site-layout {
    flex-direction: column;
  }

  .site-title {
    border-bottom: none;
    padding-bottom: 0.5rem;
    margin-bottom: 0.5rem;
  }

  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.25rem; }
}