:root {
  --color-bg: #f7faf8;
  --color-surface: #ffffff;
  --color-surface-alt: #ecf4ef;
  --color-text: #1e2925;
  --color-text-soft: #45544d;
  --color-primary: #0f6b5c;
  --color-primary-dark: #0b5449;
  --color-border: #cddbd4;
  --color-focus: #c24700;
  --shadow-soft: 0 10px 24px rgba(15, 40, 33, 0.08);
  --radius-sm: 0.4rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --font-heading: "Segoe UI", "Avenir Next", "Helvetica Neue", sans-serif;
  --font-body: "Segoe UI", "Avenir Next", "Helvetica Neue", sans-serif;
  --line-max: 72ch;
  --header-offset: 72px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding-top: var(--header-offset, 0px);
  font-family: var(--font-body);
  color: var(--color-text);
  background: radial-gradient(circle at top right, #edf7f0 0%, var(--color-bg) 45%);
  line-height: 1.55;
}

a {
  color: var(--color-primary);
  text-decoration-thickness: 0.09em;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--color-primary-dark);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

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

pre {
  max-width: 100%;
  overflow-x: auto;
  background: #10241e;
  color: #eff8f4;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

main {
  padding-bottom: var(--space-8);
}

.container {
  width: min(1140px, 100% - 3rem);
  margin-inline: auto;
}

.section {
  margin-top: var(--space-8);
}

.section h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 2vw, 2.1rem);
  margin-bottom: var(--space-3);
}

.section h3 {
  font-family: var(--font-heading);
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
}

.section p,
.section li {
  max-width: var(--line-max);
}

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(4px);
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  z-index: 100;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) 0;
}

.site-brand {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  position: sticky;
  top: 0.5rem;
  z-index: 130;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 1.15rem;
  height: 2px;
  background: currentColor;
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: "";
  position: absolute;
  left: 0;
}

.hamburger::before {
  top: -6px;
}

.hamburger::after {
  top: 6px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-nav {
  display: block;
  position: static;
  border: 0;
  background: transparent;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-item {
  position: relative;
}

.nav-link {
  width: auto;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  border: 1px solid transparent;
  background: transparent;
  color: var(--color-text);
  text-decoration: none;
  font: inherit;
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.75rem;
}

.nav-link:hover {
  background: var(--color-surface-alt);
}

.caret {
  width: 0.6rem;
  height: 0.6rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 14rem;
  list-style: none;
  margin: 0;
  padding: var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  display: none;
  gap: var(--space-1);
  box-shadow: var(--shadow-soft);
}

.nav-dropdown:hover > .dropdown-menu,
.nav-dropdown:focus-within > .dropdown-menu {
  display: grid;
}

.dropdown-link {
  display: block;
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--color-text);
}

.dropdown-link:hover {
  background: var(--color-surface-alt);
}

.hero {
  margin-top: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, #ffffff 0%, #eef8f2 100%);
  padding: clamp(2rem, 3vw, 3.2rem);
  box-shadow: var(--shadow-soft);
}

.hero h1 {
  font-size: clamp(2.25rem, 4.8vw, 3.4rem);
  margin: 0;
  line-height: 1.1;
}

.hero p {
  margin-top: var(--space-3);
  max-width: 62ch;
  color: var(--color-text-soft);
}

.eyebrow {
  margin: 0 0 var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-primary);
}

.hero-lead {
  font-size: 1.1rem;
}

.hero-supporting-copy {
  margin-bottom: 0;
}

.hero-metrics,
.info-grid,
.results-overview {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.metric-card,
.info-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.85);
  padding: var(--space-4);
}

.metric-card h2,
.info-card h3 {
  margin-top: 0;
  margin-bottom: var(--space-2);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.7rem 1rem;
  background: var(--color-primary);
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid var(--color-primary);
}

.button-link:hover {
  background: var(--color-primary-dark);
  color: #ffffff;
}

.button-link.secondary {
  background: transparent;
  color: var(--color-text);
}

.section-intro {
  max-width: 72ch;
  color: var(--color-text-soft);
}

.icon-links {
  margin-top: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.icon-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.55rem 0.9rem;
  background: var(--color-surface);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
}

.icon-button:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}

.audit-summary {
  margin-top: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  padding: var(--space-5);
  box-shadow: var(--shadow-soft);
}

.summary-block {
  margin-top: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  background: #f3f9f5;
  border: 1px solid var(--color-border);
}

.summary-block h4 {
  margin-top: 0;
  margin-bottom: var(--space-2);
  font-size: 1.05rem;
}

.chart-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.chart-placeholder {
  min-height: 220px;
  border: 1px dashed #7b988c;
  border-radius: var(--radius-sm);
  background: #fbfefd;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.chart-placeholder-message {
  text-align: center;
}

.chart-placeholder-message p {
  margin: var(--space-2) 0;
}

.chart-figure {
  width: 100%;
  margin: 0;
}

.chart-screenshot {
  display: block;
  width: 100%;
  max-height: 420px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-soft);
  background: #ffffff;
}

.chart-caption,
.caption,
figcaption {
  margin-top: var(--space-2);
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

.chart-svg {
  width: 100%;
  height: auto;
}

.chart-svg .bar {
  fill: #2f8877;
}

.chart-title {
  fill: #173831;
  font-size: 13px;
  font-weight: 600;
}

.link-row {
  margin-top: var(--space-3);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.summary-meta {
  margin-top: var(--space-3);
  color: var(--color-text-soft);
}

.limitation-note {
  margin-bottom: 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
}

.card h3,
.card h4 {
  margin-top: 0;
}

.callout {
  border-left: 4px solid var(--color-primary);
  background: #f1faf6;
  padding: var(--space-4);
  border-radius: var(--radius-sm);
}

.results-table,
.data-table,
.rubric {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  display: block;
  overflow-x: auto;
}

.results-table th,
.results-table td,
.data-table th,
.data-table td,
.rubric th,
.rubric td {
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

.results-table th,
.data-table th,
.rubric th {
  background: #eef5f1;
  font-weight: 700;
}

.figure-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  align-items: start;
}

.figure {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  padding: var(--space-4);
  box-shadow: var(--shadow-soft);
}

.figure p {
  margin-bottom: 0;
}

.list-tight {
  padding-left: 1.2rem;
}

.list-tight li + li {
  margin-top: var(--space-2);
}

.site-footer {
  margin-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  background: #ffffff;
}

.footer-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

.footer-row p {
  margin: 0;
}

.footer-note {
  margin-top: var(--space-2);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-weight: 600;
}

.zoomable-image {
  cursor: zoom-in;
}

.image-lightbox {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: none;
}

.image-lightbox.is-open {
  display: block;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(16, 24, 21, 0.72);
}

.lightbox-dialog {
  position: relative;
  z-index: 1;
  width: min(1000px, calc(100% - 2rem));
  max-height: calc(100vh - 2rem);
  margin: 1rem auto;
  border-radius: var(--radius-lg);
  background: #ffffff;
  box-shadow: 0 22px 44px rgba(0, 0, 0, 0.24);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.lightbox-close {
  align-self: flex-end;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text);
  padding: 0.55rem 0.9rem;
  font: inherit;
}

.lightbox-image {
  max-width: 100%;
  max-height: calc(100vh - 11rem);
  object-fit: contain;
  margin-inline: auto;
}

.lightbox-caption {
  margin: 0;
  color: var(--color-text-soft);
}

@media (max-width: 980px) {
  .hero-metrics,
  .info-grid,
  .results-overview,
  .chart-grid,
  .card-grid,
  .figure-row {
    grid-template-columns: 1fr;
  }

  .footer-row {
    flex-direction: column;
  }
}

@media (max-width: 839px) {
  .container {
    width: min(1100px, 100% - 2rem);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: fixed;
    left: 0;
    right: 0;
    top: var(--header-offset, 4.5rem);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-soft);
    max-height: calc(100vh - var(--header-offset, 4.5rem));
    overflow-y: auto;
    z-index: 120;
  }

  .site-header.menu-open .site-nav {
    display: block;
  }

  .nav-list {
    display: grid;
    gap: var(--space-2);
    padding: var(--space-3);
  }

  .nav-link {
    width: 100%;
  }

  .dropdown-menu {
    display: grid;
    position: static;
    min-width: auto;
    margin-top: var(--space-2);
    box-shadow: none;
  }

  .hero {
    padding: clamp(1.5rem, 2.6vw, 3rem);
  }

  .hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
  }

  .hero-actions,
  .icon-links,
  .footer-links {
    gap: var(--space-2);
  }

  .button-link {
    width: 100%;
  }

  .lightbox-dialog {
    width: min(100%, calc(100% - 1rem));
    max-height: calc(100vh - 1rem);
    margin: 0.5rem auto;
    padding: var(--space-4);
  }

  .lightbox-image {
    max-height: calc(100vh - 10rem);
  }
}