/* =========================================================
   Municipal GIS Hub — site styles
   Light, professional palette inspired by municipal GIS work.
   ========================================================= */

:root {
  --c-bg: #fbfaf6;
  --c-surface: #ffffff;
  --c-surface-2: #f3efe6;
  --c-ink: #1e293b;
  --c-ink-soft: #475569;
  --c-muted: #6b7280;
  --c-border: #e5dfd2;
  --c-primary: #1f7a8c;
  --c-primary-dark: #0f4c5c;
  --c-primary-soft: #e0f2f1;
  --c-accent: #d97706;
  --c-accent-soft: #fde68a;
  --c-success: #15803d;
  --c-success-soft: #d1fae5;
  --c-danger: #b91c1c;
  --c-purple: #7c3aed;

  --shadow-sm: 0 1px 2px rgba(15, 76, 92, 0.06);
  --shadow: 0 4px 14px rgba(15, 76, 92, 0.08);
  --shadow-lg: 0 14px 40px rgba(15, 76, 92, 0.12);

  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;

  --header-h: 68px;
  --content-max: 1280px;
  --prose-max: 78ch;

  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  --font-display: "Inter", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--c-ink);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--c-primary);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 1000;
}
.skip-link:focus { left: 0; }

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

/* =========================================================
   Header
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--c-border);
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--header-h);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--c-ink);
  text-decoration: none;
}

.site-header__logo {
  display: block;
  filter: drop-shadow(0 1px 1px rgba(15, 76, 92, 0.15));
}

.site-header__title {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.site-header__title-main {
  font-weight: 700;
  font-size: 1.05rem;
  background: linear-gradient(90deg, var(--c-primary-dark), var(--c-primary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.site-header__title-sub {
  font-size: 0.78rem;
  color: var(--c-muted);
}

/* Nav */
.primary-nav ul {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--c-ink-soft);
  font-weight: 500;
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.nav-link:hover { background: var(--c-primary-soft); color: var(--c-primary-dark); transform: translateY(-1px); }
.nav-link.is-active {
  background: linear-gradient(135deg, var(--c-primary-soft), #fff7e0);
  color: var(--c-primary-dark);
  box-shadow: inset 0 0 0 1px var(--c-primary-soft);
}
.nav-icon { width: 20px; height: 20px; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  cursor: pointer;
}
.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-ink-soft);
  margin: 4px 0;
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

@media (max-width: 820px) {
  .nav-toggle { display: inline-block; }
  .primary-nav {
    position: absolute;
    top: var(--header-h);
    left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--c-border);
    box-shadow: var(--shadow);
    transform: translateY(-110%);
    transition: transform 0.25s ease;
    visibility: hidden;
  }
  .primary-nav.is-open { transform: translateY(0); visibility: visible; }
  .primary-nav ul {
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 1rem;
    gap: 0.25rem;
  }
  .nav-link { padding: 0.75rem 0.9rem; }
}

/* =========================================================
   Main / layout shells
   ========================================================= */
.site-main {
  flex: 1 0 auto;
  width: 100%;
}

.content__shell {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.content__main {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 3rem);
  box-shadow: var(--shadow);
}

/* =========================================================
   Breadcrumbs
   ========================================================= */
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.5rem;
  padding: 0;
  margin: 0 0 1.25rem;
  list-style: none;
  font-size: 0.9rem;
  color: var(--c-muted);
}
.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--c-border);
}
.breadcrumbs a { color: var(--c-primary); text-decoration: none; }
.breadcrumbs a:hover { text-decoration: underline; }
.breadcrumbs [aria-current="page"] { color: var(--c-ink); font-weight: 500; }

/* =========================================================
   Typography
   ========================================================= */
.content__title {
  margin: 0 0 1.5rem;
  font-size: clamp(2rem, 3.2vw, 2.85rem);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, var(--c-primary-dark) 0%, var(--c-primary) 45%, var(--c-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.content__body h2 {
  margin-top: 2.4rem;
  margin-bottom: 0.9rem;
  font-size: clamp(1.4rem, 2vw, 1.7rem);
  font-weight: 700;
  color: var(--c-primary-dark);
  position: relative;
  padding-left: 0.9rem;
  scroll-margin-top: calc(var(--header-h) + 16px);
}
.content__body h2::before {
  content: "";
  position: absolute;
  left: 0; top: 0.25em; bottom: 0.25em;
  width: 5px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--c-primary), var(--c-accent));
}

.content__body h3 {
  margin-top: 1.8rem;
  margin-bottom: 0.6rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--c-primary-dark);
  scroll-margin-top: calc(var(--header-h) + 16px);
}
.content__body h4 {
  margin-top: 1.4rem;
  font-size: 1.05rem;
  color: var(--c-ink);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.content__body p {
  margin: 0 0 1.05rem;
}

.content__body ul, .content__body ol {
  margin: 0 0 1.1rem;
  padding-left: 1.4rem;
}
.content__body li { margin: 0.25rem 0; }

.content__body a {
  color: var(--c-primary-dark);
  text-decoration: underline;
  text-decoration-color: rgba(31, 122, 140, 0.4);
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
  transition: color 0.15s ease, text-decoration-color 0.15s ease, background 0.15s ease;
  border-radius: 3px;
  padding: 0 2px;
  margin: 0 -2px;
}
.content__body a:hover {
  color: var(--c-accent);
  text-decoration-color: var(--c-accent);
  background: rgba(253, 230, 138, 0.4);
}

.content__body strong { color: var(--c-ink); font-weight: 700; }

.content__body blockquote {
  margin: 1.25rem 0;
  padding: 0.75rem 1.1rem;
  border-left: 4px solid var(--c-primary);
  background: var(--c-primary-soft);
  color: var(--c-primary-dark);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* Inline code */
.content__body :not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: rgba(31, 122, 140, 0.08);
  color: var(--c-primary-dark);
  padding: 0.1em 0.4em;
  border-radius: 5px;
  border: 0;
}

/* =========================================================
   Code blocks
   ========================================================= */
.codeblock {
  position: relative;
  margin: 1.25rem 0 1.5rem;
  background: #f8f5ec;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.codeblock::before {
  content: attr(data-lang);
  position: absolute;
  top: 0.55rem; left: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-accent);
}
.codeblock pre {
  margin: 0;
  padding: 2.1rem 1rem 1rem;
  overflow-x: auto;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.55;
  color: #213547;
}
.codeblock code {
  font-family: var(--font-mono);
  background: transparent;
  color: inherit;
  padding: 0;
}

.copy-btn {
  position: absolute;
  top: 0.45rem;
  right: 0.5rem;
  background: var(--c-primary-soft);
  color: var(--c-primary-dark);
  border: 1px solid rgba(31, 122, 140, 0.25);
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.3rem 0.55rem;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.15s ease;
}
.copy-btn:hover { background: var(--c-accent-soft); transform: translateY(-1px); }
.copy-btn.is-copied { background: var(--c-success-soft); color: var(--c-success); }

/* Token highlights (light theme) */
.codeblock .tok-keyword { color: #7c3aed; font-weight: 600; }
.codeblock .tok-string { color: #047857; }
.codeblock .tok-number { color: #b45309; }
.codeblock .tok-comment { color: #94a3b8; font-style: italic; }
.codeblock .tok-builtin { color: #1f7a8c; }
.codeblock .tok-function { color: #0f4c5c; font-weight: 600; }
.codeblock .tok-class { color: #be185d; font-weight: 600; }
.codeblock .tok-operator { color: #475569; }
.codeblock .tok-decorator { color: #d97706; }

/* =========================================================
   Tables
   ========================================================= */
.table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
.table-wrap th, .table-wrap td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--c-border);
  text-align: left;
  vertical-align: top;
}
.table-wrap thead th {
  background: linear-gradient(180deg, var(--c-primary-soft), #fff);
  color: var(--c-primary-dark);
  font-weight: 700;
  border-bottom: 2px solid var(--c-primary);
  position: sticky;
  top: 0;
}
.table-wrap tbody tr:nth-child(even) { background: #faf8f2; }
.table-wrap tbody tr:hover { background: var(--c-primary-soft); }

/* =========================================================
   Task lists / checkboxes
   ========================================================= */
.content__body ul.contains-task-list,
.content__body ul li.task-list-item,
.content__body .task-list-item ul {
  list-style: none;
}
.content__body ul.contains-task-list { padding-left: 0; }
.task-list-item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.45rem 0.6rem;
  border-radius: var(--radius-sm);
  margin: 0.2rem 0;
  border: 1px solid transparent;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.task-list-item::marker { content: none; }
.task-list-item:hover { background: var(--c-primary-soft); border-color: rgba(31, 122, 140, 0.15); }
.task-list-item input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border: 2px solid var(--c-primary);
  border-radius: 5px;
  background: #fff;
  margin: 4px 0 0 0;
  cursor: pointer;
  flex: 0 0 auto;
  position: relative;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.task-list-item input[type="checkbox"]:checked {
  background: var(--c-primary);
  border-color: var(--c-primary);
}
.task-list-item input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 4px; top: 1px;
  width: 6px; height: 10px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.task-list-item.is-checked { color: var(--c-muted); }
.task-list-item.is-checked > * { text-decoration: line-through; }
.task-list-item.is-checked > input[type="checkbox"] { text-decoration: none; }

/* =========================================================
   Details / FAQ accordions
   ========================================================= */
.content__body details {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 0.4rem 1rem;
  margin: 0.6rem 0;
  box-shadow: var(--shadow-sm);
}
.content__body details[open] { box-shadow: var(--shadow); }
.content__body summary {
  cursor: pointer;
  padding: 0.6rem 0;
  font-weight: 600;
  color: var(--c-primary-dark);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}
.content__body summary::-webkit-details-marker { display: none; }
.content__body summary::after {
  content: "+";
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--c-accent);
  transition: transform 0.2s ease;
}
.content__body details[open] summary::after { content: "−"; }

/* =========================================================
   Mermaid
   ========================================================= */
.mermaid {
  text-align: center;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 1rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow-sm);
}

/* =========================================================
   Related & continue-reading
   ========================================================= */
.related {
  margin-top: 2.5rem;
  padding: 1.25rem 1.5rem;
  background: linear-gradient(135deg, var(--c-primary-soft), #fff5d6);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}
.related h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-primary-dark);
  border: 0;
  padding: 0;
}
.related h2::before { display: none; }
.related ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.4rem; }
@media (min-width: 720px) {
  .related ul { grid-template-columns: 1fr 1fr; }
}
.related li a {
  display: block;
  padding: 0.55rem 0.75rem;
  background: #fff;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border);
  color: var(--c-primary-dark);
  text-decoration: none;
  font-weight: 500;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.related li a:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--c-primary); }

/* =========================================================
   Home page
   ========================================================= */
.home-hero {
  position: relative;
  padding: clamp(2.5rem, 6vw, 5rem) 1.25rem;
  background:
    radial-gradient(1200px 400px at 20% -20%, rgba(31, 122, 140, 0.15), transparent 60%),
    radial-gradient(900px 360px at 90% 0%, rgba(217, 119, 6, 0.12), transparent 60%),
    var(--c-bg);
  text-align: center;
}
.home-hero__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.home-hero__logo {
  width: clamp(120px, 18vw, 184px);
  height: auto;
  filter: drop-shadow(0 6px 18px rgba(15, 76, 92, 0.2));
}

.home-hero__title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
  background: linear-gradient(120deg, var(--c-primary-dark) 0%, var(--c-primary) 35%, var(--c-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.home-hero__tag {
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  color: var(--c-ink-soft);
  max-width: 60ch;
  margin: 0.75rem auto 0;
}

.home-hero__paras {
  max-width: 72ch;
  margin: 0 auto;
}
.home-hero__paras p {
  margin: 0 0 1rem;
  color: var(--c-ink);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 1rem;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.95rem 1.4rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.cta:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.cta--accent {
  background: linear-gradient(135deg, var(--c-accent), #b45309);
}
.cta__icon { width: 22px; height: 22px; }

.home-section {
  max-width: var(--content-max);
  margin: 3rem auto;
  padding: 0 1.25rem;
}
.home-section h2 {
  font-size: clamp(1.4rem, 2vw, 1.75rem);
  margin: 0 0 1.25rem;
  color: var(--c-primary-dark);
}

.card-grid {
  display: grid;
  gap: 1.1rem;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: var(--c-ink);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--c-primary); }
.card__title {
  font-weight: 700;
  color: var(--c-primary-dark);
  font-size: 1.05rem;
  line-height: 1.3;
}
.card__desc {
  color: var(--c-ink-soft);
  font-size: 0.92rem;
}
.card__icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--c-primary-soft), var(--c-accent-soft));
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  margin-top: auto;
  background: linear-gradient(180deg, var(--c-surface-2), #ede6d4);
  border-top: 1px solid var(--c-border);
}
.site-footer__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 1.5rem;
}
.site-footer__brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}
.site-footer__name {
  font-weight: 700;
  color: var(--c-primary-dark);
}
.site-footer__tag {
  font-size: 0.9rem;
  color: var(--c-muted);
  max-width: 65ch;
}
.site-footer__cols {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--c-border);
}
.site-footer__col h4 {
  margin: 0 0 0.6rem;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-primary-dark);
}
.site-footer__col h4 a {
  color: inherit;
  text-decoration: none;
}
.site-footer__col h4 a:hover { color: var(--c-accent); }
.site-footer__col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.35rem; }
.site-footer__col a {
  color: var(--c-ink-soft);
  text-decoration: none;
  font-size: 0.93rem;
}
.site-footer__col a:hover { color: var(--c-primary); text-decoration: underline; }
.site-footer__bottom {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--c-muted);
  text-align: center;
}

/* =========================================================
   Wide & narrow breakpoints
   ========================================================= */
@media (min-width: 1400px) {
  :root { --content-max: 1440px; }
}

@media (max-width: 540px) {
  body { font-size: 16px; }
  .content__main { padding: 1.25rem; }
}