/* BudgetLab — calm lab / numbers */
:root {
  --bg: #F4F7FA;
  --ink: #0E3A4A;
  --mint: #3D9B8F;
  --mint-deep: #2F7A71;
  --grid: #CBD5E1;
  --paper: #FFFFFF;
  --muted: #4A6670;
  --soft: #E8EEF3;
  --warn: #B45309;
  --radius: 2px;
  --shell: min(1120px, calc(100% - 2.5rem));
  --font-sans: "Source Sans 3", "Segoe UI", sans-serif;
  --font-display: "DM Sans", "Source Sans 3", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
  background-attachment: fixed;
  min-height: 100vh;
}

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

a {
  color: var(--mint-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--ink);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 100;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.wrap {
  width: var(--shell);
  margin-inline: auto;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.84em;
  letter-spacing: 0.02em;
}

/* Header */
.site-header {
  background: color-mix(in srgb, var(--bg) 92%, white);
  border-bottom: 1px solid var(--grid);
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 0.85rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border: 1px solid var(--ink);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--mint);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
}

.nav a {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 0.1rem;
}

.nav a[aria-current="page"],
.nav a:hover {
  border-bottom-color: var(--mint);
}

/* Hero */
.hero {
  padding: 2.75rem 0 1.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2rem;
  align-items: stretch;
}

.eyebrow {
  margin: 0 0 0.6rem;
  color: var(--mint-deep);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.75rem;
}

.brand-hero {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 5vw, 3.75rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.05;
  margin: 0 0 0.85rem;
  color: var(--ink);
}

.hero-lead,
.lede {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 38rem;
  margin: 0 0 1.25rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.7rem 1.15rem;
  border: 1px solid var(--ink);
  text-decoration: none;
  border-radius: var(--radius);
  transition: background 0.15s ease, color 0.15s ease;
}

.btn-primary {
  background: var(--ink);
  color: #fff;
}

.btn-primary:hover {
  background: var(--mint-deep);
  border-color: var(--mint-deep);
  color: #fff;
}

.btn-ghost {
  background: var(--paper);
  color: var(--ink);
}

.btn-ghost:hover {
  background: var(--soft);
  color: var(--ink);
}

.hero-panel,
.key-numbers,
.inline-chart {
  background: var(--paper);
  border: 1px solid var(--grid);
  padding: 1.15rem 1.25rem 1.25rem;
  box-shadow: 4px 4px 0 color-mix(in srgb, var(--grid) 70%, transparent);
}

.panel-label {
  margin: 0 0 1rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
}

.panel-foot,
.kn-note {
  margin: 1rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
}

/* Bar charts */
.bar-chart {
  display: grid;
  gap: 0.85rem;
}

.bar-row {
  display: grid;
  grid-template-columns: 3.5rem 1fr auto;
  gap: 0.65rem;
  align-items: center;
}

.bar-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
}

.bar-track {
  height: 0.7rem;
  background: var(--soft);
  border: 1px solid var(--grid);
  overflow: hidden;
}

.bar-fill {
  display: block;
  height: 100%;
  width: var(--w, 50%);
  background: var(--mint);
}

.bar-fill.wants {
  background: color-mix(in srgb, var(--mint) 55%, var(--ink));
}

.bar-fill.save {
  background: var(--ink);
}

.bar-val {
  color: var(--muted);
  white-space: nowrap;
  font-size: 0.78rem;
}

.bar-chart.compact .bar-row {
  grid-template-columns: 3.2rem 1fr 2.4rem;
}

.inline-chart {
  margin: 0 0 1.5rem;
}

/* Sections */
.section {
  padding: 1.75rem 0 2.25rem;
}

.section-head {
  margin-bottom: 1.25rem;
}

.section-head h2,
.related h2,
.cat-title {
  font-family: var(--font-display);
  font-size: 1.55rem;
  letter-spacing: -0.02em;
  margin: 0 0 0.35rem;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1rem;
}

.feature-item {
  background: var(--paper);
  border: 1px solid var(--grid);
  padding: 1.15rem 1.2rem 1.25rem;
}

.feature-lead {
  grid-row: span 3;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 18rem;
  background:
    linear-gradient(160deg, color-mix(in srgb, var(--mint) 12%, var(--paper)), var(--paper) 55%),
    var(--paper);
}

.feature-meta {
  display: flex;
  gap: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.55rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.72rem;
}

.feature-item h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
  line-height: 1.3;
}

.feature-lead h3 {
  font-size: clamp(1.5rem, 2.5vw, 1.9rem);
}

.feature-item h3 a {
  color: var(--ink);
  text-decoration: none;
}

.feature-item h3 a:hover {
  color: var(--mint-deep);
}

.feature-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.topic-row {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.topic-row a {
  display: inline-flex;
  gap: 0.45rem;
  align-items: baseline;
  padding: 0.45rem 0.75rem;
  background: var(--paper);
  border: 1px solid var(--grid);
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 500;
}

.topic-row a:hover {
  border-color: var(--mint);
}

.topic-row .mono {
  color: var(--muted);
}

.lab-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--grid);
}

.lab-list li {
  border-bottom: 1px solid var(--grid);
  padding: 0.95rem 0;
}

.lab-list > li > a {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 600;
}

.lab-list > li > a:hover .lab-list-title {
  color: var(--mint-deep);
}

.lab-list-meta {
  color: var(--muted);
  font-weight: 400;
  white-space: nowrap;
}

.lab-list-desc {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.cat-block + .cat-block {
  margin-top: 2rem;
}

/* Article */
.page-hero,
.article-hero {
  padding: 2.25rem 0 1rem;
}

.page-hero h1,
.article-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.5vw, 2.6rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 0.75rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  color: var(--muted);
  margin: 0;
}

.article-layout {
  display: block;
  padding-bottom: 1.5rem;
}

.article-layout.has-sidebar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 16.5rem;
  gap: 1.75rem;
  align-items: start;
}

.key-numbers {
  position: sticky;
  top: 4.5rem;
}

.key-numbers dl {
  margin: 0;
}

.kn-row {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0;
  border-bottom: 1px dashed var(--grid);
}

.kn-row dt {
  color: var(--muted);
  font-size: 0.92rem;
}

.kn-row dd {
  margin: 0;
  font-weight: 500;
  color: var(--ink);
}

.prose {
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  border: 1px solid var(--grid);
  padding: 1.35rem 1.4rem 1.6rem;
}

.page-body {
  margin-bottom: 2.5rem;
}

.prose h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: -0.02em;
  margin: 1.75rem 0 0.65rem;
}

.prose h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 1.35rem 0 0.5rem;
}

.prose p,
.prose ul,
.prose ol {
  margin: 0 0 1rem;
}

.prose li + li {
  margin-top: 0.35rem;
}

.prose blockquote {
  margin: 1.1rem 0;
  padding: 0.75rem 1rem;
  border-left: 3px solid var(--mint);
  background: var(--soft);
  color: var(--muted);
}

.prose blockquote p {
  margin: 0;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--soft);
  padding: 0.1em 0.35em;
  border: 1px solid var(--grid);
}

.prose pre {
  overflow-x: auto;
  background: var(--ink);
  color: #E8EEF3;
  padding: 1rem;
  border: 1px solid var(--ink);
}

.prose pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: inherit;
}

.table-wrap {
  overflow-x: auto;
  margin: 0 0 1.1rem;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.prose th,
.prose td {
  border: 1px solid var(--grid);
  padding: 0.5rem 0.65rem;
  text-align: left;
}

.prose th {
  background: var(--soft);
  font-family: var(--font-display);
  font-weight: 600;
}

.prose td:nth-child(n+2),
.prose th:nth-child(n+2) {
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--grid);
  margin: 1.75rem 0;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0 0 1.5rem;
}

.tag {
  border: 1px solid var(--grid);
  background: var(--paper);
  padding: 0.25rem 0.5rem;
  color: var(--muted);
  text-transform: lowercase;
}

/* Ads */
.ads-slot {
  min-height: 90px;
  margin: 0.75rem auto 1.25rem;
  border: 1px dashed color-mix(in srgb, var(--grid) 80%, var(--mint));
  background: color-mix(in srgb, var(--soft) 65%, transparent);
}

.ads-slot-side {
  min-height: 250px;
  margin: 1.1rem 0 0;
  width: 100%;
}

/* Footer */
.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--grid);
  background: color-mix(in srgb, var(--bg) 70%, white);
  padding: 2rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.25rem;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0 0 0.4rem;
}

.footer-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  max-width: 36rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.15rem;
  justify-content: flex-end;
  align-content: start;
}

.footer-links a {
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--mint-deep);
}

.footer-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.88rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--grid);
}

/* Forms on contact */
.contact-box {
  background: var(--paper);
  border: 1px solid var(--grid);
  padding: 1.1rem 1.2rem;
  margin: 1rem 0;
}

.contact-box label {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  margin: 0.75rem 0 0.3rem;
}

.contact-box input,
.contact-box textarea {
  width: 100%;
  font: inherit;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--grid);
  background: var(--bg);
  color: var(--ink);
}

.contact-box button {
  margin-top: 1rem;
  font-family: var(--font-display);
  font-weight: 600;
  padding: 0.65rem 1.1rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
  cursor: pointer;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-grid,
  .feature-grid,
  .article-layout.has-sidebar,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .feature-lead {
    grid-row: auto;
    min-height: 0;
  }

  .key-numbers {
    position: static;
  }

  .bar-row {
    grid-template-columns: 3.2rem 1fr;
  }

  .bar-val {
    grid-column: 2;
  }
}

@media (max-width: 640px) {
  :root {
    --shell: min(100% - 1.5rem, 1120px);
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .lab-list > li > a {
    flex-direction: column;
    gap: 0.25rem;
  }

  .prose {
    padding: 1.05rem 0.95rem 1.25rem;
  }
}


/* === Shared responsive & brand enhancements === */
.brand-logo,.footer-logo{display:block;height:auto;max-width:100%}
.brand .brand-logo{width:min(180px,52vw)}
.footer-logo{width:min(160px,45vw);margin-bottom:.75rem;opacity:.95}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
html{-webkit-text-size-adjust:100%;overflow-x:hidden}
body{overflow-x:hidden}
img,svg,video{max-width:100%;height:auto}
.nav a,.menu-toggle,.btn,.footer-nav a,.nav-links a{min-height:44px;display:inline-flex;align-items:center}
@media(max-width:680px){.menu-toggle{display:inline-flex}.nav.is-open,.nav-links.is-open{display:flex!important;flex-direction:column;width:100%}}
@media(max-width:480px){body{font-size:1rem}h1{font-size:clamp(1.65rem,6vw,2.35rem)}}

/* Network & cross-links */
.network-footer{padding:2rem 0;border-top:1px solid var(--line,rgba(0,0,0,.08));margin-top:0}
.network-title{font-size:.85rem;text-transform:uppercase;letter-spacing:.06em;margin:0 0 .75rem;opacity:.75;font-weight:600}
.network-links{list-style:none!important;margin:0;padding:0;display:grid;gap:.65rem;grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
.network-links li{list-style:none;margin:0;padding:0}
.network-links a{display:flex;flex-direction:column;gap:.15rem;padding:.65rem .75rem;border-radius:6px;text-decoration:none;border:1px solid var(--line,rgba(0,0,0,.08))}
.network-links strong{font-size:.95rem}
.network-links span{font-size:.8rem;opacity:.75}
.feature-thumb{display:block;margin:-1.15rem -1.2rem 1rem;aspect-ratio:16/9;overflow:hidden}
.feature-thumb img{width:100%;height:100%;object-fit:cover}
.index-card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(16rem,1fr));gap:1rem}
.index-card a{display:flex;flex-direction:column;height:100%;text-decoration:none;color:inherit;border:1px solid var(--grid,var(--line,#ddd));border-radius:8px;overflow:hidden;background:var(--paper,var(--white,#fff))}
.index-card-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--cream-deep,#eee)}
.index-card-thumb img,.index-card-thumb .thumb-label{display:block}
.index-card-thumb img{width:100%;height:100%;object-fit:cover}
.index-card-body{padding:1rem 1.1rem 1.2rem}
.index-card-body h3{margin:0 0 .35rem;font-size:1.05rem}
.index-card-body p{margin:0 0 .35rem}
.cross-links{margin:1.5rem 0;padding:1rem 1.1rem;border-left:3px solid var(--steel,var(--accent,#2F5D8C));background:rgba(0,0,0,.03);font-size:.95rem}
.cross-links a{font-weight:600}
.article-hero-img{margin:1rem 0 1.25rem;border-radius:8px;overflow:hidden;aspect-ratio:16/9;background:var(--bg-ink,#eee)}
.article-hero-img img{width:100%;height:100%;object-fit:cover}