:root {
  --ink: #152033;
  --muted: #5f6d82;
  --surface: #ffffff;
  --surface-soft: #f6f8fc;
  --line: #dbe3ef;
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --accent: #0f766e;
  --shadow: 0 18px 48px rgba(21, 32, 51, 0.1);
  --shadow-hover: 0 24px 56px rgba(21, 32, 51, 0.16);
  --radius: 18px;
  --content-width: 1120px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 2rem;
}

body {
  min-width: 320px;
  color: var(--ink);
  background: var(--surface-soft);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.7;
}

a {
  color: var(--primary);
  font-weight: 700;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

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

a:focus-visible {
  outline: 3px solid #fbbf24;
  outline-offset: 4px;
  border-radius: 4px;
}

.page-header,
.links-header {
  padding: clamp(3.75rem, 9vw, 7.5rem) max(1.25rem, calc((100% - var(--content-width)) / 2));
  color: #ffffff;
  background:
    radial-gradient(circle at 88% 5%, rgba(45, 212, 191, 0.42), transparent 26rem),
    radial-gradient(circle at 5% 88%, rgba(129, 140, 248, 0.4), transparent 28rem),
    linear-gradient(135deg, #172554 0%, #312e81 50%, #4338ca 100%);
}

.page-header--hero {
  min-height: 28rem;
  display: grid;
  align-content: center;
}

.page-header h1,
.links-header h1 {
  max-width: 900px;
  margin-bottom: 1rem;
  font-size: clamp(2.1rem, 5vw, 4.3rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.page-header p,
.links-header p {
  max-width: 780px;
  color: rgba(255, 255, 255, 0.9);
}

.header-lead {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.eyebrow {
  margin-bottom: 0.8rem;
  color: var(--accent);
  font-size: 0.77rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  line-height: 1.2;
  text-transform: uppercase;
}

.page-header .eyebrow,
.links-header .eyebrow {
  color: #99f6e4;
}

.main-nav,
.links-nav {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  padding: 0.85rem 1rem;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 5px 18px rgba(21, 32, 51, 0.05);
}

.main-nav a,
.links-nav a {
  flex: 0 0 auto;
  padding: 0.55rem 0.8rem;
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 750;
  text-decoration: none;
  border-radius: 999px;
}

.main-nav a:hover,
.links-nav a:hover {
  color: var(--primary-dark);
  background: #eef2ff;
}

.page-container,
.links-content {
  width: min(var(--content-width), calc(100% - 2.5rem));
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 6rem) 0;
}

.page-container > section,
.links-content > section {
  margin-bottom: clamp(3rem, 7vw, 6rem);
}

.page-container h2,
.links-content h2 {
  margin-bottom: 1rem;
  font-size: clamp(1.65rem, 3vw, 2.45rem);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.page-container h3,
.links-content h3 {
  line-height: 1.3;
}

.page-container p + p {
  margin-top: 1rem;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 1.8rem;
}

.section-heading > p:last-child {
  color: var(--muted);
  font-size: 1.08rem;
}

.cards-container,
.resource-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.cards-container .card:last-child {
  grid-column: 1 / -1;
}

.card,
.content-card,
.link-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(21, 32, 51, 0.05);
}

.card {
  display: flex;
  flex-direction: column;
  min-height: 250px;
  padding: clamp(1.5rem, 4vw, 2.2rem);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.card:hover,
.content-card:hover,
.link-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.card-number {
  margin-bottom: 1rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 850;
  letter-spacing: 0.11em;
}

.card h3 {
  margin-bottom: 0.8rem;
  font-size: clamp(1.3rem, 2vw, 1.65rem);
}

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

.card h3 a:hover {
  color: var(--primary);
}

.card p:not(.card-number) {
  color: var(--muted);
}

.card .btn-secondary {
  display: inline-flex;
  margin-top: auto;
  padding-top: 1.5rem;
}

.content-card {
  padding: 1.4rem;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.content-card h3 {
  margin-bottom: 0.6rem;
  font-size: 1.18rem;
}

.content-card p {
  color: var(--muted);
}

.accent-section,
.links-intro {
  padding: clamp(1.5rem, 4vw, 2.6rem);
  border: 1px solid #c7d2fe;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #eef2ff, #f0fdfa);
}

.resource-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.6rem;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: fit-content;
  border-radius: 0.7rem;
  font-weight: 800;
  text-decoration: none;
}

.btn-primary {
  padding: 0.75rem 1rem;
  color: #ffffff;
  background: var(--primary);
  box-shadow: 0 8px 16px rgba(79, 70, 229, 0.24);
}

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

.btn-secondary {
  color: var(--primary);
}

.check-list,
.license-list,
.link-list {
  display: grid;
  gap: 0.75rem;
  padding-left: 1.4rem;
}

.check-list li::marker {
  color: var(--accent);
}

.license-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1.3rem;
}

.license-list li {
  padding: 1rem;
  border-left: 3px solid #818cf8;
  border-radius: 0 0.6rem 0.6rem 0;
  background: #ffffff;
}

.inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.navigation-section {
  padding-top: 1rem;
}

.page-navigation {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2rem;
}

.page-navigation a {
  padding: 0.8rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: var(--surface);
  text-decoration: none;
}

.page-navigation a:hover {
  border-color: #a5b4fc;
  background: #eef2ff;
}

.back-home {
  text-align: center;
}

.back-home a {
  display: inline-block;
  padding: 0.7rem 1rem;
  text-decoration: none;
  border-radius: 999px;
}

.back-home a:hover {
  background: #e0e7ff;
}

.links-content {
  max-width: 920px;
}

.links-intro {
  color: var(--ink);
}

.links-content > section:not(.links-intro):not(.links-pagination):not(.navigation-section):not(.back-home) {
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--line);
}

.links-content > section > h2 {
  margin-bottom: 1.5rem;
}

.link-item {
  padding: 1.4rem;
  margin-top: 1rem;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.link-item h3 {
  margin-bottom: 0.5rem;
  font-size: 1.12rem;
}

.link-url {
  display: block;
  width: fit-content;
  margin-bottom: 0.7rem;
  overflow-wrap: anywhere;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.87rem;
  font-weight: 650;
}

.link-item p {
  color: var(--muted);
}

.links-pagination {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
  padding: 1.25rem;
  border-radius: var(--radius);
  background: #e0e7ff;
}

.page-counter {
  margin-right: auto;
  color: #312e81;
  font-weight: 850;
}

.links-pagination a {
  padding: 0.55rem 0.8rem;
  border-radius: 0.55rem;
  background: #ffffff;
  text-decoration: none;
}

.page-footer {
  padding: 2.5rem 1.25rem;
  color: #cbd5e1;
  text-align: center;
  background: #111827;
}

.page-footer a {
  color: #a5f3fc;
}

@media (max-width: 720px) {
  .page-header,
  .links-header {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  .page-container,
  .links-content {
    width: min(100% - 1.5rem, var(--content-width));
  }

  .cards-container,
  .resource-list,
  .license-list {
    grid-template-columns: 1fr;
  }

  .cards-container .card:last-child {
    grid-column: auto;
  }

  .page-navigation,
  .links-pagination {
    align-items: stretch;
    flex-direction: column;
  }

  .page-counter {
    margin-right: 0;
  }

  .links-pagination a {
    text-align: center;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 0.96rem;
  }

  .main-nav,
  .links-nav {
    justify-content: flex-start;
  }

  .card,
  .content-card,
  .link-item,
  .accent-section,
  .links-intro {
    border-radius: 14px;
  }

  .resource-actions {
    flex-direction: column;
  }

  .btn-primary {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}