:root {
  --navy-950: #0c2238;
  --navy-900: #16324f;
  --navy-800: #214969;
  --teal-700: #1d6d6a;
  --teal-600: #267f7a;
  --teal-100: #dff1ef;
  --amber-600: #b96820;
  --amber-100: #fff1df;
  --ink: #1f2d3a;
  --muted: #5b6b78;
  --line: #d9e2e8;
  --paper: #ffffff;
  --wash: #f3f6f8;
  --shadow: 0 14px 35px rgba(12, 34, 56, 0.09);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--wash);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  line-height: 1.65;
}

button,
a {
  font: inherit;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.65rem 0.9rem;
  color: var(--paper);
  background: var(--navy-950);
  border-radius: 8px;
  transform: translateY(-180%);
}

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

.site-header {
  color: var(--paper);
  background: var(--navy-950);
}

.header-inner,
.hero-inner,
.tabs,
.main-content,
.site-footer {
  width: min(1120px, calc(100% - 2rem));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--paper);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--navy-950);
  background: #9fd7d2;
  border-radius: 12px;
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.04em;
}

.brand-name {
  font-weight: 700;
}

.header-meta {
  margin: 0;
  color: #c8d7e3;
  font-size: 0.9rem;
}

.hero {
  position: relative;
  overflow: hidden;
  color: var(--paper);
  background:
    radial-gradient(circle at 84% 16%, rgba(92, 194, 185, 0.28), transparent 29%),
    linear-gradient(135deg, var(--navy-900), #1e5570 72%, #1e716f);
}

.hero::after {
  position: absolute;
  right: -7rem;
  bottom: -11rem;
  width: 26rem;
  height: 26rem;
  content: "";
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 50%;
  box-shadow:
    0 0 0 3rem rgba(255, 255, 255, 0.035),
    0 0 0 7rem rgba(255, 255, 255, 0.025);
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(3.5rem, 8vw, 6.5rem);
}

.eyebrow,
.section-kicker {
  margin: 0 0 0.7rem;
  color: #9fd7d2;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

.hero-subtitle {
  margin: 0.45rem 0 1.4rem;
  color: #d7e9ee;
  font-size: clamp(1.15rem, 2.5vw, 1.7rem);
}

.hero-description {
  max-width: 690px;
  margin: 0;
  color: #dce8ee;
  font-size: 1.04rem;
}

.course-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 2rem;
}

.course-facts span {
  padding: 0.55rem 0.8rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  color: #eaf4f6;
  font-size: 0.88rem;
  backdrop-filter: blur(6px);
}

.tabs-shell {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 4px 18px rgba(12, 34, 56, 0.04);
  backdrop-filter: blur(12px);
}

.tabs {
  display: flex;
  gap: 0.2rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.tab-button {
  position: relative;
  flex: 0 0 auto;
  padding: 1rem 1.2rem;
  color: var(--muted);
  background: transparent;
  border: 0;
  cursor: pointer;
  font-weight: 700;
}

.tab-button::after {
  position: absolute;
  right: 1rem;
  bottom: 0;
  left: 1rem;
  height: 3px;
  content: "";
  background: transparent;
  border-radius: 3px 3px 0 0;
}

.tab-button:hover {
  color: var(--navy-900);
}

.tab-button[aria-selected="true"] {
  color: var(--teal-700);
}

.tab-button[aria-selected="true"]::after {
  background: var(--teal-600);
}

.tab-button:focus-visible,
.resource-link:focus-visible,
.brand:focus-visible {
  outline: 3px solid #e0a253;
  outline-offset: 3px;
}

.main-content {
  min-height: 520px;
  padding-block: clamp(2.2rem, 6vw, 4.5rem);
}

.tab-panel[hidden] {
  display: none;
}

.tab-panel {
  animation: panel-in 220ms ease-out;
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.7fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: start;
}

.section-kicker {
  color: var(--teal-700);
}

.intro-grid h2,
.section-heading h2 {
  margin: 0;
  color: var(--navy-900);
  font-size: clamp(1.75rem, 4vw, 2.65rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.intro-grid p,
.section-heading p {
  color: var(--muted);
}

.note-card {
  padding: 1.5rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.note-card h3 {
  margin: 0 0 0.7rem;
  color: var(--navy-900);
}

.note-card ol {
  margin: 0;
  padding-left: 1.3rem;
}

.note-card li + li {
  margin-top: 0.45rem;
}

.available-now {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 2rem;
  padding: 1rem 1.1rem;
  background: var(--teal-100);
  border-radius: 12px;
  color: #234f4c;
}

.available-now p {
  margin: 0;
}

.status-dot {
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  background: var(--teal-600);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(38, 127, 122, 0.14);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2rem;
}

.section-heading p:last-child {
  margin-bottom: 0;
  font-size: 1.02rem;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.15rem;
}

.resource-grid-single {
  grid-template-columns: minmax(0, 720px);
}

.resource-card {
  display: flex;
  min-height: 310px;
  flex-direction: column;
  padding: 1.45rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(12, 34, 56, 0.055);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.resource-card:hover {
  border-color: #b7ccd7;
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.card-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  margin-bottom: 1.6rem;
}

.resource-number {
  color: #90a2af;
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.resource-type {
  padding: 0.32rem 0.64rem;
  color: var(--teal-700);
  background: var(--teal-100);
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.025em;
}

.solution-card {
  background: linear-gradient(180deg, #fffaf4, var(--paper) 42%);
  border-color: #ead5bd;
}

.solution-label {
  color: #824619;
  background: var(--amber-100);
}

.featured-card {
  min-height: 280px;
  background:
    linear-gradient(120deg, rgba(223, 241, 239, 0.85), transparent 52%),
    var(--paper);
}

.resource-card h3 {
  margin: 0;
  color: var(--navy-900);
  font-size: 1.3rem;
  line-height: 1.25;
}

.resource-card p {
  margin: 0.8rem 0 1.5rem;
  color: var(--muted);
}

.resource-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  align-self: flex-start;
  margin-top: auto;
  padding: 0.72rem 1rem;
  color: var(--paper);
  background: var(--teal-700);
  border-radius: 10px;
  text-decoration: none;
  font-weight: 750;
}

.resource-link:hover {
  background: #145e5b;
}

.noscript-note {
  margin-top: 1.5rem;
  padding: 0.8rem 1rem;
  background: #fff4d8;
  border: 1px solid #f1d287;
  border-radius: 10px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding-block: 2rem;
  color: #cbd9e3;
}

body > .site-footer {
  width: 100%;
  max-width: none;
  margin: 0;
  padding-inline: max(1rem, calc((100% - 1120px) / 2));
  background: var(--navy-950);
}

.site-footer p {
  margin: 0;
}

.site-footer p + p {
  margin-top: 0.2rem;
}

.footer-year {
  font-weight: 800;
}

@media (max-width: 820px) {
  .resource-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (max-width: 590px) {
  .header-meta {
    display: none;
  }

  .hero-inner {
    padding-block: 3.4rem;
  }

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

  .resource-card {
    min-height: 275px;
  }

  .site-footer {
    flex-direction: column;
    gap: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .tab-panel,
  .resource-card {
    animation: none;
    transition: none;
  }
}