/* =========================================================================
   Python GIS — design system
   Elegant, professional light theme. Wide on desktop, fluid on mobile.
   ========================================================================= */

:root {
  /* Palette */
  --bg: #f6faf9;
  --surface: #ffffff;
  --surface-2: #eef4f3;
  --surface-3: #e6efed;
  --ink: #14302b;
  --ink-soft: #4c5f5b;
  --ink-faint: #6f817d;
  --line: #d9e6e2;
  --line-strong: #c2d6d1;

  --brand: #0f9d8c;
  --brand-strong: #0b7c6e;
  --brand-tint: #e3f4f1;
  --brand-2: #2f7de0;
  --accent: #e8833a;
  --accent-gold: #f6c453;
  --violet: #7c5cff;
  --green: #3aa856;

  /* Code */
  --code-bg: #f3f8f7;
  --code-border: #dceae6;
  --inline-code-bg: #e7f2ef;
  --inline-code-ink: #0b6d61;

  /* Typography */
  --font-sans: "Segoe UI", Roboto, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Cascadia Code", Consolas, "Liberation Mono", Menlo, monospace;
  --fs-base: clamp(1rem, 0.96rem + 0.2vw, 1.075rem);

  /* Layout */
  --header-h: 64px;
  --container: 1320px;
  --container-narrow: 1180px;
  --radius: 14px;
  --radius-sm: 9px;
  --radius-lg: 22px;
  --gap: clamp(1rem, 0.6rem + 1.4vw, 2rem);

  --shadow-sm: 0 1px 2px rgba(16, 49, 44, 0.06), 0 2px 8px rgba(16, 49, 44, 0.05);
  --shadow-md: 0 6px 18px rgba(16, 49, 44, 0.08), 0 2px 6px rgba(16, 49, 44, 0.05);
  --shadow-lg: 0 18px 50px rgba(16, 49, 44, 0.14);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

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

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

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1rem, 0.4rem + 2.4vw, 2.5rem);
}

/* Anchor offset so in-page links clear the sticky header */
:target { scroll-margin-top: calc(var(--header-h) + 1.2rem); }
h1, h2, h3, h4, h5, h6 { scroll-margin-top: calc(var(--header-h) + 1.2rem); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--brand);
  color: #fff;
  padding: 0.7rem 1.1rem;
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ----- Typography ------------------------------------------------------- */
h1, h2, h3, h4 { line-height: 1.22; font-weight: 700; color: var(--ink); margin: 2.2rem 0 0.8rem; }
h1 { font-size: clamp(1.85rem, 1.4rem + 2.2vw, 2.85rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.4rem, 1.15rem + 1.1vw, 1.95rem); letter-spacing: -0.015em; }
h3 { font-size: clamp(1.15rem, 1.02rem + 0.6vw, 1.4rem); }
h4 { font-size: 1.08rem; }
p { margin: 0 0 1.15rem; }

a { color: var(--brand-strong); text-decoration: none; transition: color 0.18s var(--ease); }
a:hover { color: var(--accent); }

.prose a {
  color: var(--brand-strong);
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 0% 2px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size 0.25s var(--ease), color 0.18s var(--ease);
}
.prose a:hover { color: var(--accent); background-size: 100% 2px; }

strong { font-weight: 700; color: #0c241f; }

/* Heading anchor links */
.heading-anchor {
  margin-left: 0.4rem;
  color: var(--line-strong);
  opacity: 0;
  font-weight: 500;
  text-decoration: none;
  transition: opacity 0.18s var(--ease), color 0.18s var(--ease);
}
h1:hover .heading-anchor, h2:hover .heading-anchor,
h3:hover .heading-anchor, h4:hover .heading-anchor { opacity: 1; }
.heading-anchor:hover { color: var(--brand); }

/* ----- Header ----------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.18rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.brand:hover { color: var(--ink); }
.brand-mark { width: 38px; height: 38px; transition: transform 0.3s var(--ease); }
.brand:hover .brand-mark { transform: rotate(-6deg) scale(1.06); }
.brand:hover .brand-pin { animation: pin-bounce 0.6s var(--ease); }
@keyframes pin-bounce {
  0%, 100% { transform: translateY(0); }
  40% { transform: translateY(-2.5px); }
}
.brand__text {
  background: linear-gradient(92deg, var(--brand) 0%, var(--brand-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.primary-nav ul {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
  font-weight: 600;
  position: relative;
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}
.nav-link .icon { width: 18px; height: 18px; }
.nav-link:hover { background: var(--brand-tint); color: var(--brand-strong); }
.nav-link.is-active { color: var(--brand-strong); background: var(--brand-tint); }
.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: -1px;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius-sm);
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  cursor: pointer;
}
.nav-toggle .icon { width: 22px; height: 22px; }
.nav-toggle__close { display: none; }

@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s var(--ease);
  }
  .primary-nav.is-open { max-height: 70vh; }
  .primary-nav ul { flex-direction: column; align-items: stretch; padding: 0.6rem; gap: 0.2rem; }
  .nav-link { padding: 0.8rem 1rem; }
  .nav-link.is-active::after { display: none; }
  body.nav-open .nav-toggle__open { display: none; }
  body.nav-open .nav-toggle__close { display: inline-block; }
}

/* ----- Breadcrumbs ------------------------------------------------------ */
.breadcrumbs { margin: 0 0 1.4rem; font-size: 0.9rem; }
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.breadcrumbs li { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--ink-faint); }
.breadcrumbs li:not(:last-child)::after { content: "›"; color: var(--line-strong); }
.breadcrumbs a { color: var(--ink-soft); }
.breadcrumbs a:hover { color: var(--brand-strong); }
.breadcrumbs [aria-current="page"] span { color: var(--ink); font-weight: 600; }

/* ----- Sections / page width ------------------------------------------- */
.page-section { padding: clamp(2rem, 1rem + 4vw, 3.5rem) 0; }
.lede { font-size: 1.15rem; color: var(--ink-soft); max-width: 70ch; }

/* Homepage intro: two readable columns that together fill the container width */
.home-intro { display: grid; gap: clamp(1rem, 0.5rem + 2.5vw, 3rem); margin-top: 0.5rem; }
.home-intro p { margin: 0; max-width: none; }
.home-intro .lede { color: var(--ink); }
@media (min-width: 860px) {
  .home-intro { grid-template-columns: 1fr 1fr; align-items: start; }
}

/* ----- Buttons ---------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.8rem 1.35rem;
  border-radius: 999px;
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease), background 0.18s var(--ease);
}
.btn--primary { background: linear-gradient(95deg, var(--brand) 0%, var(--brand-2) 100%); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--ghost { background: var(--surface); border-color: var(--line-strong); color: var(--brand-strong); }
.btn--ghost:hover { transform: translateY(-2px); border-color: var(--brand); color: var(--brand-strong); box-shadow: var(--shadow-sm); }
.btn .icon { width: 20px; height: 20px; }

/* ----- Cards & grids ---------------------------------------------------- */
.card-grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
}
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem 1.4rem 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), border-color 0.2s var(--ease);
  --card-accent: var(--brand);
}
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: var(--card-accent);
  opacity: 0.9;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--card-accent); }
.card__icon {
  display: inline-flex;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  color: var(--card-accent);
  background: color-mix(in srgb, var(--card-accent) 12%, #fff);
  margin-bottom: 0.4rem;
}
.card__icon .icon { width: 26px; height: 26px; }
.card__title { margin: 0; font-size: 1.18rem; }
.card__title a { color: var(--ink); }
.card__title a::after { content: ""; position: absolute; inset: 0; }
.card:hover .card__title a { color: var(--card-accent); }
.card__desc { margin: 0; color: var(--ink-soft); font-size: 0.96rem; }
.card__meta { margin-top: auto; color: var(--ink-faint); font-size: 0.82rem; font-weight: 600; letter-spacing: 0.02em; }

/* compact list card variant */
.link-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.6rem; }
.link-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  transition: transform 0.16s var(--ease), border-color 0.16s var(--ease), color 0.16s var(--ease);
}
.link-list a:hover { transform: translateX(4px); border-color: var(--brand); color: var(--brand-strong); }
.link-list a .icon { width: 18px; height: 18px; color: var(--brand); flex: none; }

/* ----- Hero ------------------------------------------------------------- */
.hero { padding: clamp(2.5rem, 1rem + 6vw, 5rem) 0 clamp(2rem, 1rem + 3vw, 3.5rem); text-align: center; }
.hero__logo { width: clamp(96px, 12vw, 150px); height: auto; display: block; margin: 0 auto 1.5rem; filter: drop-shadow(0 12px 28px rgba(15, 157, 140, 0.28)); transition: transform 0.4s var(--ease); }
.hero__logo:hover { transform: translateY(-4px) rotate(-3deg); }
.hero h1 { margin-top: 0; max-width: 18ch; margin-inline: auto; }
.hero__tagline {
  background: linear-gradient(95deg, var(--brand) 0%, var(--brand-2) 60%, var(--violet) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__intro { max-width: 65ch; margin: 1.2rem auto 0; color: var(--ink-soft); font-size: 1.12rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 0.8rem; justify-content: center; margin-top: 2rem; }

.cta-grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  margin-top: 1rem;
}
.cta-tile {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-align: left;
  padding: 1.15rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  --tile-accent: var(--brand);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), border-color 0.2s var(--ease);
}
.cta-tile:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--tile-accent); }
.cta-tile__icon {
  flex: none;
  width: 52px; height: 52px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(135deg, var(--tile-accent), color-mix(in srgb, var(--tile-accent) 55%, #000 6%));
  box-shadow: 0 6px 14px color-mix(in srgb, var(--tile-accent) 35%, transparent);
  transition: transform 0.25s var(--ease);
}
.cta-tile:hover .cta-tile__icon { transform: rotate(-8deg) scale(1.05); }
.cta-tile__icon .icon { width: 28px; height: 28px; }
.cta-tile__body { display: flex; flex-direction: column; gap: 0.15rem; }
.cta-tile__title { font-weight: 700; color: var(--ink); }
.cta-tile:hover .cta-tile__title { color: var(--tile-accent); }
.cta-tile__desc { font-size: 0.9rem; color: var(--ink-soft); }

/* ----- Prose / article -------------------------------------------------- */
.article { padding: 2rem 0 3.5rem; }
.article__inner { max-width: var(--container-narrow); margin-inline: auto; }
.article__title { margin-top: 0.4rem; }
.article__title {
  background: linear-gradient(96deg, var(--brand-strong) 0%, var(--brand-2) 55%, var(--violet) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.prose { font-size: 1.06rem; }
.prose > :first-child { margin-top: 0; }
.prose ul, .prose ol { margin: 0 0 1.15rem; padding-left: 1.4rem; }
.prose li { margin: 0.35rem 0; }
.prose li::marker { color: var(--brand); }
.prose blockquote {
  margin: 1.4rem 0;
  padding: 0.6rem 1.2rem;
  border-left: 4px solid var(--brand);
  background: var(--brand-tint);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--ink-soft);
}
.prose hr { border: none; border-top: 1px solid var(--line); margin: 2.5rem 0; }
.prose img { border-radius: var(--radius-sm); box-shadow: var(--shadow-sm); }

/* Inline code */
code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--inline-code-bg);
  color: var(--inline-code-ink);
  padding: 0.12em 0.4em;
  border-radius: 5px;
}

/* Code blocks */
.code-block {
  position: relative;
  margin: 1.6rem 0;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.code-block::after {
  content: attr(data-lang);
  position: absolute;
  top: 0.55rem;
  left: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  pointer-events: none;
}
.code-block pre {
  margin: 0;
  padding: 2.1rem 1.2rem 1.2rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.65;
  color: #234b44;
  background: none;
}
.code-block code { background: none; color: inherit; padding: 0; font-size: inherit; border-radius: 0; }
.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.32rem 0.7rem;
  font-size: 0.76rem;
  font-weight: 700;
  font-family: var(--font-sans);
  color: var(--brand-strong);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.18s var(--ease), background 0.18s var(--ease), color 0.18s var(--ease);
}
.code-block:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }
.copy-btn:hover { background: var(--brand); color: #fff; border-color: var(--brand); }
.copy-btn.is-copied { background: var(--green); color: #fff; border-color: var(--green); opacity: 1; }
@media (hover: none) { .copy-btn { opacity: 1; } }

/* Prism token colors — light theme tuned to palette */
.token.comment, .token.prolog, .token.doctype, .token.cdata { color: #7c9b95; font-style: italic; }
.token.punctuation { color: #5a716c; }
.token.namespace { opacity: 0.7; }
.token.property, .token.tag, .token.constant, .token.symbol, .token.deleted { color: #2f7de0; }
.token.boolean, .token.number { color: #c0631a; }
.token.selector, .token.attr-name, .token.string, .token.char, .token.builtin, .token.inserted { color: #2e8b57; }
.token.operator, .token.entity, .token.url { color: #0b7c6e; }
.token.atrule, .token.attr-value, .token.keyword { color: #0f9d8c; font-weight: 600; }
.token.function, .token.class-name { color: #7c5cff; }
.token.regex, .token.important, .token.variable { color: #e8833a; }
.token.important, .token.bold { font-weight: 700; }
.token.italic { font-style: italic; }

/* ----- Tables ----------------------------------------------------------- */
.table-wrap {
  overflow-x: auto;
  margin: 1.6rem 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  -webkit-overflow-scrolling: touch;
}
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
thead th { background: var(--surface-2); color: var(--ink); text-align: left; font-weight: 700; }
th, td { padding: 0.7rem 1rem; border-bottom: 1px solid var(--line); white-space: nowrap; }
tbody tr:last-child td { border-bottom: none; }
tbody tr { transition: background 0.15s var(--ease); }
tbody tr:hover { background: var(--brand-tint); }

/* ----- Task lists ------------------------------------------------------- */
.contains-task-list { list-style: none; padding-left: 0; }
.task-list-item { list-style: none; }
.task-list-item::marker { content: ""; }
.task-checkbox {
  width: 1.05em; height: 1.05em;
  margin-right: 0.55em;
  vertical-align: -0.12em;
  accent-color: var(--brand);
  cursor: pointer;
}
.task-list-item:has(.task-checkbox:checked) { color: var(--ink-faint); text-decoration: line-through; }

/* ----- FAQ accordions --------------------------------------------------- */
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  margin: 0.7rem 0;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.faq-item > summary {
  cursor: pointer;
  list-style: none;
  padding: 1rem 1.2rem;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.faq-item > summary::-webkit-details-marker { display: none; }
.faq-item > summary::after {
  content: "";
  flex: none;
  width: 11px; height: 11px;
  border-right: 2px solid var(--brand);
  border-bottom: 2px solid var(--brand);
  transform: rotate(45deg);
  transition: transform 0.22s var(--ease);
}
.faq-item[open] > summary::after { transform: rotate(-135deg); }
.faq-item > summary:hover { color: var(--brand-strong); }
.faq-item__body { padding: 0 1.2rem 1.1rem; color: var(--ink-soft); }
.faq-item__body > :first-child { margin-top: 0; }

/* ----- Mermaid ---------------------------------------------------------- */
.mermaid {
  margin: 1.8rem 0;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
  box-shadow: var(--shadow-sm);
  overflow-x: auto;
}
.mermaid:not([data-processed]) { color: transparent; min-height: 2rem; }
.mermaid svg { max-width: 100%; height: auto; }

/* Diagrams & images are clickable to open full screen */
.viz-ready { position: relative; cursor: zoom-in; transition: box-shadow 0.2s var(--ease), border-color 0.2s var(--ease); }
.viz-ready:hover { border-color: var(--brand); box-shadow: var(--shadow-md); }
.viz-ready:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.viz-expand {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.65rem;
  font: 600 0.72rem/1 var(--font-sans);
  color: var(--brand-strong);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  cursor: zoom-in;
  opacity: 0;
  transition: opacity 0.18s var(--ease), background 0.18s var(--ease), color 0.18s var(--ease);
}
.viz-ready:hover .viz-expand, .viz-ready:focus-within .viz-expand { opacity: 1; }
.viz-expand:hover { background: var(--brand); color: #fff; border-color: var(--brand); }
.viz-expand svg { width: 14px; height: 14px; }
@media (hover: none) { .viz-expand { opacity: 1; } }

.prose img.viz-ready { cursor: zoom-in; display: block; margin-inline: auto; }

/* Full-screen viewer (lightbox) */
.viz-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  background: rgba(8, 28, 25, 0.92);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s var(--ease), visibility 0.2s var(--ease);
}
.viz-modal.is-open { opacity: 1; visibility: visible; }
.viz-modal__bar {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 0.7rem 1rem;
  color: #fff;
}
.viz-modal__title { margin-right: auto; font-weight: 600; font-size: 0.95rem; color: #d4e8e4; padding-left: 0.4rem; max-width: 60%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.viz-modal__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-width: 40px;
  height: 40px;
  padding: 0 0.8rem;
  font: 700 0.9rem/1 var(--font-sans);
  color: #eaf6f3;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.16s var(--ease);
}
.viz-modal__btn:hover { background: rgba(255, 255, 255, 0.22); }
.viz-modal__close { background: var(--brand); border-color: var(--brand); }
.viz-modal__close:hover { background: var(--brand-strong); }
.viz-modal__stage {
  flex: 1 1 auto;
  overflow: hidden;
  display: grid;
  place-items: center;
  touch-action: none;
}
.viz-modal__content {
  transform-origin: center center;
  transition: transform 0.05s linear;
  cursor: grab;
  will-change: transform;
}
.viz-modal__content:active { cursor: grabbing; }
.viz-modal__content svg,
.viz-modal__content img {
  display: block;
  max-width: 92vw;
  max-height: 80vh;
  width: auto;
  height: auto;
  background: #fff;
  border-radius: 10px;
  padding: 1rem;
}
.viz-modal__hint { flex: none; text-align: center; color: #9cbab4; font-size: 0.78rem; padding: 0 1rem 0.8rem; }

/* ----- Article footer nav ---------------------------------------------- */
.article-nav {
  margin-top: 3rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--line);
}
.article-nav__heading { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-faint); margin: 0 0 0.9rem; }

/* ----- Footer ----------------------------------------------------------- */
.site-footer { background: #0c2925; color: #c8ded9; margin-top: 4rem; }
.site-footer a { color: #d4e8e4; }
.site-footer a:hover { color: var(--accent-gold); }
.site-footer__inner {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1.4fr 1fr 1fr;
  padding-top: 2.8rem;
  padding-bottom: 2.2rem;
}
.site-footer__brand { display: flex; gap: 0.9rem; align-items: flex-start; }
.site-footer__brand .brand-mark { width: 44px; height: 44px; }
.site-footer__name { font-weight: 800; font-size: 1.1rem; color: #fff; margin: 0; }
.site-footer__tagline { margin: 0.2rem 0 0; color: #9cbab4; font-size: 0.92rem; }
.site-footer__heading { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.1em; color: #7fa39d; margin: 0 0 0.9rem; }
.site-footer__nav ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; font-size: 0.95rem; }
.site-footer__bar { border-top: 1px solid rgba(255, 255, 255, 0.08); }
.site-footer__bar p { margin: 0; padding: 1.1rem 0; font-size: 0.85rem; color: #8eaca6; text-align: center; }

@media (max-width: 720px) {
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
  .site-footer__brand { grid-column: 1 / -1; }
}
@media (max-width: 460px) {
  .site-footer__inner { grid-template-columns: 1fr; }
}

/* ----- Section intro block --------------------------------------------- */
.section-head { padding: clamp(1.8rem, 1rem + 3vw, 3rem) 0 0.5rem; }
.section-head__eyebrow { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 0.85rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--brand-strong); }
.section-head__eyebrow .icon { width: 18px; height: 18px; }
.intro-prose { max-width: var(--container-narrow); }
.intro-prose .prose { font-size: 1.08rem; color: var(--ink-soft); }

/* Wide desktop: give long-form prose room without going edge to edge */
@media (min-width: 1100px) {
  .article__inner, .intro-prose { margin-inline: 0; }
}