:root {
  --color-navy: #172033;
  --color-blue: #2563eb;
  --color-blue-dark: #1d4ed8;
  --color-gold: #f4b942;
  --color-bg: #f8fafc;
  --color-white: #ffffff;
  --color-text: #111827;
  --color-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-green: #15803d;
  --color-green-bg: #dcfce7;
  --color-amber: #b45309;
  --color-amber-bg: #fef3c7;
  --color-blue-bg: #dbeafe;
  --shadow-soft: 0 16px 40px rgba(23, 32, 51, 0.08);
  --radius: 8px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-white);
  color: var(--color-text);
  font-family: Inter, "Source Sans 3", "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

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

a {
  color: var(--color-blue);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

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

h1,
h2,
h3,
h4 {
  color: var(--color-navy);
  line-height: 1.18;
  margin: 0 0 0.55em;
}

h1 {
  font-size: 3.7rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.15rem;
}

h4 {
  font-size: 1rem;
}

p {
  margin: 0 0 1rem;
}

ul,
ol {
  margin-top: 0;
}

input,
select,
textarea,
button {
  font: inherit;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  background: var(--color-white);
  padding: 0.72rem 0.82rem;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus,
button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(244, 185, 66, 0.75);
  outline-offset: 3px;
}

.container {
  width: min(calc(100% - 2rem), var(--container));
  margin-inline: auto;
}

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

.skip-link {
  position: absolute;
  z-index: 1000;
  top: 0.8rem;
  left: 0.8rem;
  transform: translateY(-160%);
  background: var(--color-navy);
  color: var(--color-white);
  border-radius: var(--radius);
  padding: 0.65rem 0.9rem;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
}

.site-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  min-height: 72px;
  gap: 1rem;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-navy);
  text-decoration: none;
  font-weight: 800;
}

.site-brand__mark {
  display: inline-grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: var(--radius);
  background: var(--color-navy);
  color: var(--color-white);
  font-weight: 800;
}

.site-brand__text {
  color: var(--color-navy);
  font-size: 1.05rem;
}

.site-brand__logo {
  display: block;
  max-width: 220px;
  max-height: 46px;
  width: auto;
  height: auto;
}

.site-brand--footer .site-brand__logo {
  max-height: 52px;
}

.primary-nav {
  justify-self: end;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.primary-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  color: var(--color-navy);
  border-radius: var(--radius);
  padding: 0.55rem 0.68rem;
  text-decoration: none;
  font-weight: 650;
  font-size: 0.94rem;
}

.primary-nav a:hover,
.primary-nav .current-menu-item > a {
  background: var(--color-bg);
  color: var(--color-blue);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-white);
  color: var(--color-navy);
}

.nav-toggle__bar,
.nav-toggle__bar::before,
.nav-toggle__bar::after {
  display: block;
  width: 20px;
  height: 2px;
  margin: auto;
  background: currentColor;
  content: "";
}

.nav-toggle__bar::before {
  transform: translateY(-7px);
}

.nav-toggle__bar::after {
  transform: translateY(5px);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 0.64rem 0.95rem;
  cursor: pointer;
  font-weight: 750;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.button--primary {
  background: var(--color-blue);
  color: var(--color-white);
}

.button--primary:hover {
  background: var(--color-blue-dark);
  color: var(--color-white);
}

.button--secondary {
  background: var(--color-white);
  border-color: var(--color-blue);
  color: var(--color-blue);
}

.button--secondary:hover {
  background: var(--color-blue-bg);
}

.button--tertiary {
  background: var(--color-bg);
  border-color: var(--color-border);
  color: var(--color-navy);
}

.button--muted {
  background: #f3f4f6;
  border-color: var(--color-border);
  color: var(--color-muted);
  cursor: default;
}

.button--full {
  width: 100%;
}

.hero {
  background:
    linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px),
    var(--color-bg);
  background-size: 30px 30px;
  border-bottom: 1px solid var(--color-border);
}

.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 4rem);
  min-height: 520px;
  padding-block: clamp(4rem, 8vw, 6.5rem);
}

.hero__tagline {
  color: var(--color-blue);
  font-size: 1.75rem;
  font-weight: 800;
  margin-top: -0.35rem;
}

.hero__copy {
  max-width: 680px;
  color: #374151;
  font-size: 1.16rem;
}

.hero__actions,
.filter-panel__actions,
.resource-card__actions,
.resource-row__detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero__math {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

.hero__math span {
  min-height: 92px;
  border: 1px solid rgba(37, 99, 235, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.74);
  color: var(--color-navy);
  display: grid;
  place-items: center;
  padding: 1rem;
  font-family: "Cambria Math", Cambria, Georgia, serif;
  font-size: 1.2rem;
  box-shadow: var(--shadow-soft);
}

.section {
  padding-block: clamp(3rem, 6vw, 5rem);
}

.section--compact {
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.section--tinted {
  background: var(--color-bg);
}

.section--flush {
  padding-block: 2rem 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 1.35rem;
}

.section-heading--split {
  display: flex;
  align-items: end;
  justify-content: space-between;
  max-width: none;
  gap: 1rem;
}

.eyebrow {
  color: var(--color-blue);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
  margin-bottom: 0.45rem;
}

.page-header {
  max-width: 860px;
  margin-bottom: 2rem;
}

.page-header--compact {
  margin-bottom: 1.25rem;
}

.page-header p,
.section-heading p {
  color: var(--color-muted);
  font-size: 1.05rem;
}

.pathway-grid,
.resource-card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.pathway-grid--three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.pathway-card,
.resource-card,
.content-panel,
.download-panel,
.selector-band,
.notice,
.filter-panel,
.how-to-panel,
.empty-state {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-white);
}

.pathway-card,
.resource-card,
.content-panel,
.download-panel,
.how-to-panel,
.empty-state {
  padding: 1.2rem;
}

.pathway-card {
  color: var(--color-text);
  text-decoration: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.pathway-card:hover {
  border-color: rgba(37, 99, 235, 0.45);
  box-shadow: var(--shadow-soft);
  transform: translateY(-2px);
}

.pathway-card p,
.resource-card p,
.content-panel p {
  color: #374151;
}

.pathway-card span:not(.status-badge) {
  color: var(--color-blue);
  font-weight: 800;
}

.pathway-card--muted {
  background: var(--color-bg);
}

.resource-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.resource-card__title {
  margin-bottom: 0;
}

.resource-card__title a {
  color: var(--color-navy);
  text-decoration: none;
}

.resource-card__title a:hover {
  color: var(--color-blue);
}

.resource-card__meta,
.resource-detail__badges,
.resource-row__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.resource-card__topic {
  color: var(--color-muted);
  font-weight: 700;
  margin-bottom: 0;
}

.meta-badge,
.status-badge {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  border-radius: 999px;
  padding: 0.18rem 0.58rem;
  font-size: 0.79rem;
  font-weight: 800;
  line-height: 1.2;
}

.meta-badge {
  background: var(--color-bg);
  color: #374151;
  border: 1px solid var(--color-border);
}

.status-badge--available {
  background: var(--color-green-bg);
  color: var(--color-green);
}

.status-badge--coming-soon {
  background: var(--color-amber-bg);
  color: var(--color-amber);
}

.status-badge--updated {
  background: var(--color-blue-bg);
  color: var(--color-blue-dark);
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  gap: 1.5rem;
  align-items: start;
}

.two-column--top {
  margin-top: 1.5rem;
}

.feature-list {
  display: grid;
  gap: 0.85rem;
}

.feature-list > div {
  border-left: 4px solid var(--color-gold);
  padding: 0.2rem 0 0.2rem 1rem;
}

.numbered-steps {
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding-left: 1.3rem;
  font-weight: 700;
}

.disclaimer-strip {
  background: var(--color-navy);
  color: var(--color-white);
  padding-block: 1rem;
}

.disclaimer-strip p {
  margin: 0;
  color: inherit;
}

.disclaimer-strip--inline {
  border-radius: var(--radius);
  margin-top: 1.5rem;
  padding: 1rem;
}

.breadcrumbs {
  margin-bottom: 1.1rem;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--color-muted);
  font-size: 0.92rem;
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 0.35rem;
  color: #9ca3af;
}

.selector-band,
.notice {
  padding: 1.1rem;
  margin-bottom: 1.35rem;
}

.selector-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--color-bg);
}

.selector-band p,
.notice p {
  margin: 0;
  color: #374151;
}

.section-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1.2rem 0 1.6rem;
}

.section-tabs a {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-white);
  color: var(--color-navy);
  padding: 0.55rem 0.78rem;
  text-decoration: none;
  font-weight: 800;
}

.section-tabs a:hover,
.section-tabs a[aria-current="page"] {
  border-color: var(--color-blue);
  color: var(--color-blue);
  background: var(--color-blue-bg);
}

.resource-list {
  display: grid;
  gap: 0.75rem;
}

.resource-row {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-white);
  overflow: hidden;
}

.resource-row--coming-soon {
  background: #fffdf7;
}

.resource-row__summary {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(240px, auto) minmax(220px, auto);
  gap: 1rem;
  align-items: center;
  padding: 0.95rem;
}

.resource-row__topic {
  display: flex;
  align-items: center;
  min-width: 0;
  gap: 0.75rem;
}

.resource-row__topic strong,
.resource-row__topic span:last-child span {
  display: block;
}

.resource-row__topic span:last-child {
  min-width: 0;
}

.resource-row__topic span:last-child span {
  color: var(--color-muted);
  font-size: 0.92rem;
}

.topic-code {
  display: inline-grid;
  flex: 0 0 auto;
  min-width: 48px;
  min-height: 40px;
  place-items: center;
  border-radius: var(--radius);
  background: var(--color-navy);
  color: var(--color-white);
  font-weight: 850;
}

.resource-row__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: end;
  gap: 0.5rem;
}

.resource-row__details {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  padding: 1rem;
}

.resource-row__details[hidden] {
  display: none;
}

.resource-row__detail-actions {
  grid-column: 1 / -1;
  padding-top: 0.35rem;
}

.check-list {
  display: grid;
  gap: 0.35rem;
  margin: 0;
  padding-left: 1.15rem;
}

.muted {
  color: var(--color-muted);
}

.filter-panel {
  padding: 1rem;
  margin-bottom: 1.3rem;
}

.filter-panel label,
.contact-form label {
  display: grid;
  gap: 0.35rem;
  color: var(--color-navy);
  font-weight: 800;
}

.filter-panel label span,
.contact-form label span {
  font-size: 0.92rem;
}

.filter-panel__search {
  margin-bottom: 0.9rem;
}

.filter-panel__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
}

.filter-panel__actions {
  margin-top: 0.9rem;
}

.pagination {
  margin-top: 1.5rem;
}

.pagination ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.pagination a,
.pagination span {
  display: inline-grid;
  min-width: 38px;
  min-height: 38px;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
}

.pagination .current {
  background: var(--color-blue);
  color: var(--color-white);
  border-color: var(--color-blue);
}

.resource-detail__header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  align-items: start;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.resource-detail__badges {
  margin-top: 0.8rem;
}

.download-panel {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 0.75rem;
  box-shadow: var(--shadow-soft);
}

.download-panel h2 {
  font-size: 1.2rem;
  margin-bottom: 0;
}

.download-panel p {
  margin: 0;
  color: var(--color-muted);
}

.prose > *:first-child {
  margin-top: 0;
}

.prose > *:last-child {
  margin-bottom: 0;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  gap: 1.4rem;
  align-items: start;
}

.contact-form {
  display: grid;
  gap: 0.95rem;
}

.form-message {
  border-radius: var(--radius);
  padding: 0.8rem 0.9rem;
  font-weight: 800;
}

.form-message--success {
  background: var(--color-green-bg);
  color: var(--color-green);
}

.form-message--error {
  background: #fee2e2;
  color: #b91c1c;
}

.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding-block: 2.2rem;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(220px, 0.9fr) minmax(280px, 1.2fr) minmax(280px, 1fr);
  gap: 1.5rem;
}

.site-footer p {
  color: #374151;
}

.footer-nav ul {
  columns: 2;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-nav li {
  break-inside: avoid;
  margin-bottom: 0.35rem;
}

.footer-nav a {
  color: var(--color-navy);
  text-decoration: none;
  font-weight: 700;
}

.footer-nav a:hover {
  color: var(--color-blue);
}

.back-to-top {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 90;
  width: 46px;
  height: 46px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-navy);
  color: var(--color-white);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .site-header__inner {
    grid-template-columns: auto auto auto;
  }

  .primary-nav {
    order: 4;
    grid-column: 1 / -1;
    justify-self: stretch;
    display: none;
    padding-bottom: 0.9rem;
  }

  .primary-nav.is-open {
    display: block;
  }

  .primary-nav__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.25rem;
  }

  .nav-toggle {
    display: inline-grid;
    place-items: center;
    justify-self: end;
  }

  .site-header__cta {
    justify-self: end;
  }

  .hero__inner,
  .two-column,
  .resource-detail__header,
  .contact-layout,
  .site-footer__inner {
    grid-template-columns: 1fr;
  }

  .download-panel {
    position: static;
  }

  .pathway-grid,
  .pathway-grid--three,
  .resource-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .filter-panel__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .resource-row__summary {
    grid-template-columns: 1fr;
  }

  .resource-row__actions {
    justify-content: start;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(calc(100% - 1.2rem), var(--container));
  }

  .site-header__inner {
    min-height: 64px;
    grid-template-columns: 1fr auto;
  }

  .site-header__cta {
    display: none;
  }

  .site-brand__text {
    font-size: 1rem;
  }

  h1 {
    font-size: 2.45rem;
  }

  h2 {
    font-size: 1.6rem;
  }

  .hero__tagline {
    font-size: 1.35rem;
  }

  .primary-nav__list,
  .pathway-grid,
  .pathway-grid--three,
  .resource-card-grid,
  .filter-panel__grid,
  .resource-row__details {
    grid-template-columns: 1fr;
  }

  .hero__inner {
    min-height: auto;
    padding-block: 3.2rem;
  }

  .hero__math {
    grid-template-columns: 1fr 1fr;
  }

  .hero__math span {
    min-height: 72px;
    font-size: 1rem;
  }

  .section-heading--split,
  .selector-band {
    align-items: start;
    flex-direction: column;
  }

  .resource-row__topic {
    align-items: flex-start;
  }

  .resource-row__actions .button,
  .resource-card__actions .button,
  .hero__actions .button,
  .filter-panel__actions .button {
    width: 100%;
  }

  .footer-nav ul {
    columns: 1;
  }
}

@media (max-width: 430px) {
  h1 {
    font-size: 2.05rem;
  }

  h2 {
    font-size: 1.42rem;
  }

  .button {
    padding-inline: 0.75rem;
  }

  .hero__math {
    grid-template-columns: 1fr;
  }

  .topic-code {
    min-width: 42px;
    min-height: 36px;
  }
}