/* =================================================================
   PyQGIS Engineering & Automation — design system
   Light, professional, GIS-inspired palette.
   ================================================================= */

:root {
  /* Brand palette */
  --green-900: #143d27;
  --green-800: #1b5e3a;
  --green-700: #2e7d4f;
  --green-600: #38914f;
  --green-500: #43a047;
  --green-300: #a5d6b3;
  --green-100: #e4f3ea;

  --teal-500: #1aa39a;
  --blue-500: #1e88e5;
  --cyan-400: #26c6da;
  --amber-500: #f59e0b;

  /* Neutrals */
  --ink: #16241d;
  --ink-soft: #34463c;
  --muted: #5d6f65;
  --line: #e2ebe5;
  --line-strong: #cdded3;
  --surface: #ffffff;
  --surface-2: #f3f8f4;
  --bg: #f6faf7;

  /* Code */
  --code-bg: #f5f8f6;
  --code-bar: #eaf1ec;
  --code-border: #dde9e1;
  --inline-code-bg: rgba(46, 125, 79, 0.10);
  --inline-code-fg: #1b5e3a;

  /* Typography */
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code",
    "Cascadia Code", Menlo, Consolas, "Liberation Mono", monospace;

  /* Metrics */
  --header-height: 66px;
  --content-max: 1480px;
  --wide-max: 1480px;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 22px;

  /* Effects */
  --shadow-sm: 0 1px 2px rgba(20, 61, 39, 0.06), 0 1px 3px rgba(20, 61, 39, 0.08);
  --shadow-md: 0 6px 18px rgba(20, 61, 39, 0.08), 0 2px 6px rgba(20, 61, 39, 0.06);
  --shadow-lg: 0 18px 48px rgba(20, 61, 39, 0.14);
  --ring: 0 0 0 3px rgba(46, 125, 79, 0.30);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: clamp(1rem, 0.96rem + 0.18vw, 1.075rem);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

img, svg { display: block; max-width: 100%; }
svg { height: auto; }

a { color: var(--green-700); text-decoration: none; }

:where(h1, h2, h3, h4, h5, h6) { line-height: 1.2; font-weight: 700; color: var(--ink); }

:where(h2, h3, h4)[id] { scroll-margin-top: calc(var(--header-height) + 1.25rem); }
:target { scroll-margin-top: calc(var(--header-height) + 1.25rem); }

::selection { background: var(--green-300); color: var(--green-900); }

:focus-visible { outline: none; box-shadow: var(--ring); border-radius: 6px; }

.site-main { flex: 1 0 auto; }

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  background: var(--green-700);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  z-index: 200;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 0.75rem; }

/* ---------- Icons ---------- */
.ico { display: inline-block; vertical-align: middle; flex: none; }
.ico--chevron, .ico--arrow { color: currentColor; }

/* =================================================================
   Header
   ================================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 250, 247, 0.82);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  max-width: var(--wide-max);
  margin-inline: auto;
  padding: 0 clamp(1rem, 3vw, 2rem);
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand { display: inline-flex; align-items: center; gap: 0.65rem; }
.brand__logo { width: 40px; height: 40px; transition: transform 0.3s var(--ease); }
.brand:hover .brand__logo { transform: rotate(-6deg) scale(1.06); }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__name {
  font-weight: 800; font-size: 1.18rem; letter-spacing: -0.02em;
  background: linear-gradient(120deg, var(--green-700), var(--teal-500));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.brand__sub { font-size: 0.72rem; color: var(--muted); font-weight: 600; letter-spacing: 0.02em; }

.primary-nav__list {
  list-style: none; padding: 0; display: flex; align-items: center; gap: 0.35rem;
}
.nav-link {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.5rem 0.85rem; border-radius: 999px;
  color: var(--ink-soft); font-weight: 600; font-size: 0.95rem;
  position: relative; transition: background 0.2s var(--ease), color 0.2s var(--ease), transform 0.2s var(--ease);
}
.nav-link:hover { background: var(--green-100); color: var(--green-800); transform: translateY(-1px); }
.nav-link.is-current { background: var(--green-700); color: #fff; }
.nav-link.is-current .ico { filter: drop-shadow(0 1px 1px rgba(0,0,0,0.15)); }

.nav-toggle {
  display: none; width: 44px; height: 44px; border: 1px solid var(--line-strong);
  background: var(--surface); border-radius: 12px; cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle__bar { width: 20px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform 0.25s var(--ease), opacity 0.2s var(--ease); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =================================================================
   Hero
   ================================================================= */
.hero {
  background:
    radial-gradient(1200px 520px at 80% -10%, rgba(38, 198, 218, 0.16), transparent 60%),
    radial-gradient(900px 480px at 0% 0%, rgba(67, 160, 71, 0.16), transparent 55%),
    linear-gradient(180deg, #f1f8f3, var(--bg));
  border-bottom: 1px solid var(--line);
}
.hero__inner {
  max-width: var(--wide-max);
  margin-inline: auto;
  padding: clamp(2.5rem, 6vw, 5rem) clamp(1rem, 3vw, 2rem) clamp(2.5rem, 5vw, 4rem);
  text-align: center;
}
.hero__logo {
  width: clamp(120px, 18vw, 168px);
  height: auto;
  margin: 0 auto 1.5rem;
  filter: drop-shadow(0 12px 28px rgba(20, 61, 39, 0.18));
  animation: floaty 6s ease-in-out infinite;
}
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
.hero__title {
  font-size: clamp(2.1rem, 1.4rem + 3.4vw, 3.8rem);
  letter-spacing: -0.03em; font-weight: 800; line-height: 1.05;
}
.hero__amp { color: var(--teal-500); -webkit-text-fill-color: var(--teal-500); }
.hero__tagline {
  margin-top: 0.85rem; font-size: clamp(1.05rem, 1rem + 0.6vw, 1.4rem);
  color: var(--green-800); font-weight: 600;
}
.hero__copy {
  margin: 1.75rem auto 0; color: var(--ink-soft); text-align: left;
  display: grid; gap: 0.9rem;
}
.hero__copy p { font-size: 1.05rem; }

.hero__cta {
  margin-top: 2.25rem; display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center;
}
.cta {
  display: inline-flex; align-items: center; gap: 0.85rem;
  padding: 0.9rem 1.4rem; border-radius: var(--radius);
  font-weight: 700; box-shadow: var(--shadow-md);
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
  border: 1px solid transparent;
}
.cta:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.cta:hover .ico--arrow { transform: translateX(4px); }
.cta .ico--arrow { transition: transform 0.22s var(--ease); }
.cta--primary { background: linear-gradient(135deg, var(--green-700), var(--green-500)); color: #fff; }
.cta--secondary { background: var(--surface); color: var(--green-800); border-color: var(--line-strong); }
.cta__icon { display: inline-grid; place-items: center; background: rgba(255,255,255,0.18); border-radius: 12px; padding: 6px; }
.cta--secondary .cta__icon { background: var(--green-100); }
.cta__text { display: flex; flex-direction: column; line-height: 1.15; text-align: left; }
.cta__label { font-size: 1.02rem; }
.cta__hint { font-size: 0.78rem; font-weight: 600; opacity: 0.85; }

/* =================================================================
   Overview / panels
   ================================================================= */
.overview__inner {
  max-width: var(--wide-max); margin-inline: auto;
  padding: clamp(2.5rem, 5vw, 4.5rem) clamp(1rem, 3vw, 2rem);
}
.section-heading {
  font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.4rem); letter-spacing: -0.02em; text-align: center;
}
.section-intro { text-align: center; color: var(--muted); margin: 0.6rem auto 0; max-width: 60ch; }

.overview__grid {
  margin-top: 2.5rem; display: grid; gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}
.panel {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: clamp(1.4rem, 2.5vw, 2rem);
  box-shadow: var(--shadow-sm); display: flex; flex-direction: column;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}
.panel:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--green-300); }
.panel__head { display: flex; align-items: center; gap: 0.9rem; margin-bottom: 0.85rem; }
.panel__icon { display: inline-grid; place-items: center; background: var(--surface-2); border-radius: 14px; padding: 8px; }
.panel__title { font-size: 1.3rem; letter-spacing: -0.01em; }
.panel__title a { color: var(--ink); }
.panel__title a:hover { color: var(--green-700); }
.panel__desc { color: var(--ink-soft); }
.topic-list { list-style: none; padding: 0; margin: 1.1rem 0 1.25rem; display: grid; gap: 0.2rem; }
.topic-list a {
  display: flex; align-items: center; justify-content: space-between; gap: 0.5rem;
  padding: 0.6rem 0.75rem; border-radius: 10px; color: var(--ink-soft); font-weight: 600;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), transform 0.18s var(--ease);
}
.topic-list a:hover { background: var(--green-100); color: var(--green-800); transform: translateX(3px); }
.topic-list .ico--chevron { color: var(--green-500); opacity: 0.7; }
.panel__cta { margin-top: auto; align-self: flex-start; display: inline-flex; align-items: center; gap: 0.4rem; font-weight: 700; color: var(--green-700); }
.panel__cta .ico--arrow { transition: transform 0.2s var(--ease); }
.panel__cta:hover .ico--arrow { transform: translateX(4px); }

/* =================================================================
   Document pages
   ================================================================= */
.doc__container {
  max-width: var(--content-max); margin-inline: auto;
  padding: clamp(1.25rem, 3vw, 2rem) clamp(1rem, 3vw, 2rem) 3.5rem;
}
.doc__layout { display: grid; grid-template-columns: 1fr; gap: clamp(1.5rem, 4vw, 3rem); }
.doc__main { min-width: 0; }

.doc__header { margin: 0.5rem 0 1.75rem; }
.doc__title {
  font-size: clamp(1.9rem, 1.3rem + 2.6vw, 3rem); letter-spacing: -0.025em; line-height: 1.08;
  background: linear-gradient(120deg, var(--green-800), var(--teal-500) 60%, var(--blue-500));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.doc__lede { margin-top: 0.85rem; font-size: 1.12rem; color: var(--muted); }

/* ---------- Breadcrumbs ---------- */
.breadcrumbs { margin-bottom: 1rem; }
.breadcrumbs__list { list-style: none; padding: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 0.15rem; font-size: 0.875rem; }
.breadcrumbs__item { display: inline-flex; align-items: center; gap: 0.15rem; color: var(--muted); }
.breadcrumbs__item a { display: inline-flex; align-items: center; gap: 0.3rem; color: var(--muted); padding: 0.2rem 0.35rem; border-radius: 7px; transition: color 0.18s var(--ease), background 0.18s var(--ease); }
.breadcrumbs__item a:hover { color: var(--green-700); background: var(--green-100); }
.breadcrumbs__item .ico--chevron { color: var(--line-strong); }
.breadcrumbs__item [aria-current="page"] { color: var(--ink); font-weight: 600; padding: 0.2rem 0.35rem; }

/* =================================================================
   Prose
   ================================================================= */
.prose { color: var(--ink-soft); font-size: 1.06rem; }
.prose > * + * { margin-top: 1.15rem; }
.prose p { max-width: none; }
.prose h2 {
  font-size: clamp(1.45rem, 1.2rem + 1vw, 1.95rem); letter-spacing: -0.015em;
  margin-top: 2.6rem; padding-top: 0.4rem; color: var(--green-900);
  position: relative; padding-left: 0.9rem;
}
.prose h2::before {
  content: ""; position: absolute; left: 0; top: 0.55em; height: 0.95em; width: 5px;
  border-radius: 3px; background: linear-gradient(var(--green-500), var(--teal-500));
}
.prose h3 { font-size: clamp(1.2rem, 1.05rem + 0.6vw, 1.45rem); margin-top: 2rem; color: var(--green-800); }
.prose h4 { font-size: 1.12rem; margin-top: 1.6rem; color: var(--ink); }
.prose ul, .prose ol { padding-left: 1.4rem; }
.prose li + li { margin-top: 0.4rem; }
.prose li::marker { color: var(--green-500); }
.prose strong { color: var(--ink); font-weight: 700; }
.prose blockquote {
  border-left: 4px solid var(--green-300); background: var(--surface-2);
  padding: 0.9rem 1.2rem; border-radius: 0 12px 12px 0; color: var(--ink-soft);
}
.prose hr { border: none; border-top: 1px solid var(--line); margin: 2.5rem 0; }

/* Links in prose */
.prose a {
  color: var(--green-700); font-weight: 600;
  text-decoration: underline; text-decoration-color: var(--green-300);
  text-underline-offset: 3px; text-decoration-thickness: 2px;
  transition: color 0.18s var(--ease), text-decoration-color 0.18s var(--ease);
}
.prose a:hover { color: var(--green-800); text-decoration-color: var(--green-600); }

/* Heading anchor */
.header-anchor { margin-left: 0.4rem; color: var(--green-300); text-decoration: none; font-weight: 700; opacity: 0; transition: opacity 0.18s var(--ease), color 0.18s var(--ease); }
.prose :hover > .header-anchor, .header-anchor:focus { opacity: 1; }
.header-anchor:hover { color: var(--green-600); }

/* ---------- Inline code ---------- */
:not(pre) > code {
  font-family: var(--font-mono); font-size: 0.88em;
  background: var(--inline-code-bg); color: var(--inline-code-fg);
  padding: 0.12em 0.4em; border-radius: 6px; white-space: nowrap;
}

/* ---------- Code blocks ---------- */
.code-block {
  margin: 1.6rem 0; border: 1px solid var(--code-border); border-radius: var(--radius);
  background: var(--code-bg); overflow: hidden; box-shadow: var(--shadow-sm);
}
.code-block__bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.45rem 0.5rem 0.45rem 0.95rem; background: var(--code-bar);
  border-bottom: 1px solid var(--code-border);
}
.code-block__lang { font-family: var(--font-mono); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.code-copy {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font: inherit; font-size: 0.78rem; font-weight: 600; color: var(--green-800);
  background: var(--surface); border: 1px solid var(--code-border); border-radius: 8px;
  padding: 0.32rem 0.6rem; cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), transform 0.18s var(--ease);
}
.code-copy:hover { background: var(--green-100); transform: translateY(-1px); }
.code-copy.is-copied { background: var(--green-700); color: #fff; border-color: var(--green-700); }
.code-block__pre {
  margin: 0; padding: 1.1rem 1.15rem; overflow-x: auto;
  font-family: var(--font-mono); font-size: 0.9rem; line-height: 1.6;
  tab-size: 4; color: #243b30;
}
.code-block__pre code { font-family: inherit; background: none; padding: 0; white-space: pre; }

/* Prism token theme (light, brand-matched) */
.token.comment, .token.prolog, .token.doctype, .token.cdata { color: #7f9488; font-style: italic; }
.token.punctuation { color: #51635a; }
.token.keyword, .token.control, .token.important { color: #1565c0; font-weight: 600; }
.token.boolean, .token.number { color: #b26a00; }
.token.string, .token.char, .token.attr-value { color: #2e7d32; }
.token.operator, .token.entity, .token.url { color: #51635a; }
.token.function, .token.method { color: #6a3ab2; }
.token.class-name, .token.maybe-class-name { color: #0277bd; }
.token.builtin { color: #0b8079; }
.token.decorator, .token.annotation { color: #b26a00; }
.token.tag, .token.selector { color: #1565c0; }
.token.attr-name, .token.property { color: #6a3ab2; }
.token.regex, .token.variable { color: #b25000; }
.token.deleted { color: #c0392b; }
.token.inserted { color: #2e7d32; }

/* ---------- Tables ---------- */
.table-wrap {
  margin: 1.6rem 0; overflow-x: auto; border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow-sm); -webkit-overflow-scrolling: touch;
}
.table-wrap table { border-collapse: collapse; width: 100%; min-width: 520px; font-size: 0.95rem; background: var(--surface); }
.table-wrap thead th { background: var(--green-100); color: var(--green-900); text-align: left; font-weight: 700; }
.table-wrap th, .table-wrap td { padding: 0.7rem 0.95rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.table-wrap tbody tr:nth-child(even) { background: var(--surface-2); }
.table-wrap tbody tr:hover { background: var(--green-100); }
.table-wrap td code { white-space: nowrap; }

/* ---------- Task list checkboxes ---------- */
.prose ul.contains-task-list { list-style: none; padding-left: 0.25rem; }
.task-list-item { display: flex; align-items: flex-start; gap: 0.65rem; }
.task-list-item::marker { content: ""; }
.task-list-item input.task-list-item-checkbox {
  appearance: none; -webkit-appearance: none; flex: none; margin-top: 0.32em;
  width: 1.2em; height: 1.2em; border: 2px solid var(--line-strong); border-radius: 6px;
  background: var(--surface); cursor: pointer; position: relative;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}
.task-list-item input.task-list-item-checkbox:hover { border-color: var(--green-500); }
.task-list-item input.task-list-item-checkbox:checked { background: var(--green-600); border-color: var(--green-600); }
.task-list-item input.task-list-item-checkbox:checked::after {
  content: ""; position: absolute; left: 0.32em; top: 0.12em;
  width: 0.32em; height: 0.62em; border: solid #fff; border-width: 0 2.5px 2.5px 0; transform: rotate(45deg);
}
.task-list-item.is-checked { color: var(--muted); text-decoration: line-through; text-decoration-color: var(--green-300); }
.task-list-item label { cursor: pointer; }

/* ---------- Math ---------- */
.math-block { margin: 1.6rem 0; overflow-x: auto; text-align: center; }
.katex { font-size: 1.04em; }

/* ---------- Mermaid ---------- */
pre.mermaid { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; text-align: center; box-shadow: var(--shadow-sm); overflow-x: auto; }

/* =================================================================
   Related / cards
   ================================================================= */
.related { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--line); }
.related__title { font-size: 1.4rem; letter-spacing: -0.01em; margin-bottom: 1.25rem; color: var(--green-900); }
.card-grid { display: grid; gap: 1.1rem; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card {
  display: flex; flex-direction: column; gap: 0.45rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.2rem 1.25rem; box-shadow: var(--shadow-sm);
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease), border-color 0.22s var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--green-300); }
.card__kicker { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--teal-500); }
.card__title { font-size: 1.08rem; color: var(--ink); letter-spacing: -0.01em; }
.card:hover .card__title { color: var(--green-700); }
.card__desc { color: var(--muted); font-size: 0.92rem; line-height: 1.55; }
.card__cta { margin-top: auto; display: inline-flex; align-items: center; gap: 0.3rem; color: var(--green-700); font-weight: 700; font-size: 0.92rem; }
.card:hover .card__cta .ico--arrow { transform: translateX(4px); }
.card__cta .ico--arrow { transition: transform 0.2s var(--ease); }
.related__back { margin-top: 1.5rem; }
.back-link { display: inline-flex; align-items: center; gap: 0.4rem; font-weight: 700; color: var(--green-700); }
.back-link .ico--arrow { transform: rotate(180deg); transition: transform 0.2s var(--ease); }
.back-link:hover .ico--arrow { transform: rotate(180deg) translateX(4px); }

/* =================================================================
   On-this-page TOC
   ================================================================= */
.toc { position: sticky; top: calc(var(--header-height) + 1.25rem); }
.toc__title { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); margin-bottom: 0.65rem; }
.toc__list { list-style: none; padding: 0; display: grid; gap: 0.1rem; border-left: 2px solid var(--line); }
.toc__list a {
  display: block; padding: 0.32rem 0 0.32rem 0.85rem; margin-left: -2px;
  border-left: 2px solid transparent; color: var(--muted); font-size: 0.9rem; line-height: 1.4;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.toc__list a:hover { color: var(--green-700); }
.toc__list a.is-active { color: var(--green-800); border-left-color: var(--green-600); font-weight: 600; }
.toc__list .toc-h3 a { padding-left: 1.6rem; font-size: 0.85rem; }

/* =================================================================
   Footer
   ================================================================= */
.site-footer { flex-shrink: 0; margin-top: 3rem; background: linear-gradient(180deg, var(--surface-2), #eef5f0); border-top: 1px solid var(--line); }
.site-footer__inner {
  max-width: var(--wide-max); margin-inline: auto; padding: clamp(2rem, 4vw, 3rem) clamp(1rem, 3vw, 2rem);
  display: grid; gap: 2rem; grid-template-columns: 1.3fr 1fr 1fr 1fr;
}
.site-footer__brand { max-width: 32ch; }
.site-footer__logo { width: 44px; height: 44px; margin-bottom: 0.6rem; }
.site-footer__name { font-weight: 800; color: var(--green-900); }
.site-footer__tag { color: var(--muted); font-size: 0.9rem; margin-top: 0.2rem; }
.footer-col__title { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--green-800); margin-bottom: 0.7rem; }
.site-footer__nav ul { list-style: none; padding: 0; display: grid; gap: 0.4rem; }
.site-footer__nav a { color: var(--ink-soft); font-size: 0.92rem; transition: color 0.18s var(--ease), padding-left 0.18s var(--ease); }
.site-footer__nav a:hover { color: var(--green-700); padding-left: 3px; }
.site-footer__bottom { border-top: 1px solid var(--line); }
.site-footer__bottom p { max-width: var(--wide-max); margin-inline: auto; padding: 1rem clamp(1rem, 3vw, 2rem); color: var(--muted); font-size: 0.85rem; }
.site-footer__nav { display: contents; }

/* =================================================================
   Responsive
   ================================================================= */
@media (min-width: 1024px) {
  .doc__layout { grid-template-columns: minmax(0, 1fr) 15rem; }
  .doc__aside { display: block; }
}
@media (max-width: 1023px) {
  .doc__aside { display: none; }
}

@media (max-width: 820px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: fixed; inset: var(--header-height) 0 auto 0;
    background: var(--surface); border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    transform: translateY(-130%); transition: transform 0.3s var(--ease);
    max-height: calc(100dvh - var(--header-height)); overflow-y: auto;
  }
  .primary-nav.is-open { transform: translateY(0); }
  .primary-nav__list { flex-direction: column; align-items: stretch; gap: 0.25rem; padding: 1rem clamp(1rem, 3vw, 2rem); }
  .nav-link { font-size: 1.05rem; padding: 0.75rem 0.9rem; border-radius: 12px; }
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
  .site-footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 520px) {
  .brand__sub { display: none; }
  .hero__cta { flex-direction: column; align-items: stretch; }
  .cta { justify-content: space-between; }
  .site-footer__inner { grid-template-columns: 1fr; }
}