:root {
  --p: #6366f1;
  --p-rgb: 99, 102, 241;
  --bg: #faf9f7;
  --ink: #1c1917;
  --ink-secondary: #57534e;
  --ink-tertiary: #a8a29e;
  --surface: #fff;
  --rule: #e7e5e4;
  --serif: "Newsreader", "Georgia", "Times New Roman", serif;
  --sans: "Figtree", system-ui, -apple-system, sans-serif;
  --content-w: 780px;
  --hero-w: 760px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  color: var(--ink);
  line-height: 1.7;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

h1, h2, .ed-section-num, .hub-count {
  font-family: var(--serif);
}

nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 249, 247, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 0.9rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  border-bottom: 1px solid var(--rule);
}

nav a.home {
  font-family: var(--sans);
  color: var(--ink);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-secondary);
}

.nav-link:hover {
  color: var(--p);
}

nav a.dl,
.btn {
  display: inline-block;
  font-family: var(--sans);
  background: var(--ink);
  color: var(--bg);
  padding: 0.65rem 1.4rem;
  border-radius: 100px;
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.01em;
  transition: background 0.3s var(--ease-out), transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.download-link {
  position: relative;
  isolation: isolate;
  z-index: 2;
}

.download-qr {
  position: absolute;
  z-index: 10;
  width: 196px;
  padding: 0.9rem;
  color: var(--ink);
  border-radius: 1rem;
  background: #fff;
  border: 1px solid rgba(28, 25, 23, 0.08);
  box-shadow: 0 22px 40px rgba(28, 25, 23, 0.16);
  opacity: 1;
  visibility: hidden;
  pointer-events: none;
  text-align: center;
  isolation: isolate;
  transition: transform 0.24s var(--ease-out), visibility 0s linear 0.24s;
}

.download-qr::before {
  content: "";
  position: absolute;
  inset: -10px;
  z-index: -1;
  border-radius: 1.35rem;
  background: #fff;
  box-shadow: 0 16px 32px rgba(28, 25, 23, 0.1);
}

.download-qr img {
  display: block;
  width: 168px;
  height: 168px;
  margin: 0 auto 0.4rem;
  border-radius: 0.75rem;
  background: #fff;
  box-shadow: inset 0 0 0 10px #fff;
  image-rendering: pixelated;
}

.download-link .download-qr p {
  font-size: 0.82rem;
  line-height: 1.3;
  font-weight: 600;
  color: var(--ink);
}

nav a.dl:hover,
.btn:hover {
  background: var(--p);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(var(--p-rgb), 0.25);
}

@media (hover: hover) and (pointer: fine) {
  .download-link--nav .download-qr {
    top: calc(100% + 0.85rem);
    right: 0;
    transform: translateY(-6px);
  }

  .download-link--cta .download-qr {
    bottom: calc(100% + 1rem);
    left: 50%;
    transform: translate(-50%, 6px);
  }

  .download-link:hover .download-qr,
  .download-link:focus-visible .download-qr {
    visibility: visible;
    transition-delay: 0s;
  }

  .download-link--nav:hover .download-qr,
  .download-link--nav:focus-visible .download-qr {
    transform: translateY(0);
  }

  .download-link--cta:hover .download-qr,
  .download-link--cta:focus-visible .download-qr {
    transform: translate(-50%, 0);
  }
}

@media (hover: none), (pointer: coarse) {
  .download-qr {
    display: none !important;
  }
}

.hero {
  position: relative;
  background: var(--ink);
  color: #fff;
  padding: 7rem 2rem 6rem;
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 55% at 50% 35%, rgba(var(--p-rgb), 0.18) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after,
.cta::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.4;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.06'/%3E%3C/svg%3E");
  background-size: 256px 256px;
  pointer-events: none;
}

.hero .badge,
.hero .hero-kicker {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.75);
  padding: 0.4rem 1.1rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 2rem;
}

.hero .badge::before,
.hero .hero-kicker::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgb(var(--p-rgb));
  flex-shrink: 0;
  animation: pulse-dot 2.5s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% {
    opacity: 0.5;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.4);
  }
}

.hero h1 {
  position: relative;
  z-index: 1;
  max-width: var(--hero-w);
  margin: 0 auto 1.2rem;
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.hero p {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.66);
  line-height: 1.8;
}

.ed-main {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
}

.ed-main::before {
  content: "";
  position: absolute;
  left: 2rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(var(--p-rgb), 0.3) 8%,
    rgba(var(--p-rgb), 0.3) 92%,
    transparent 100%
  );
  pointer-events: none;
}

main {
  padding: 4.5rem 0 3rem;
  margin-left: 2rem;
}

.ed-section-inner {
  position: relative;
  padding: 3rem 0 3rem 2.5rem;
  border-bottom: 1px solid var(--rule);
}

.ed-section-num {
  position: absolute;
  left: -0.5rem;
  top: 1.5rem;
  font-size: 6rem;
  font-weight: 400;
  line-height: 1;
  color: rgba(var(--p-rgb), 0.06);
  letter-spacing: -0.04em;
  user-select: none;
  pointer-events: none;
  font-style: italic;
  transition: color 0.6s var(--ease-out);
}

.ed-section.visible .ed-section-num {
  color: rgba(var(--p-rgb), 0.08);
}

.ed-section-body {
  position: relative;
  z-index: 1;
}

h2 {
  font-size: 1.55rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 1rem;
  letter-spacing: -0.015em;
  line-height: 1.3;
}

h2::after {
  content: "";
  display: block;
  width: 32px;
  height: 2px;
  background: var(--p);
  border-radius: 1px;
  margin-top: 0.75rem;
  opacity: 0.7;
}

.ed-section-body p,
.hub-intro,
.hub-card p {
  color: var(--ink-secondary);
  font-size: 1.04rem;
  line-height: 1.8;
}

.ed-section-body p + p {
  margin-top: 0.9rem;
}

.ed-lead {
  font-size: 1.12rem;
  color: var(--ink);
  line-height: 1.75;
  border-left: 3px solid rgba(var(--p-rgb), 0.35);
  padding-left: 1.2rem;
  margin-bottom: 1.1rem;
}

.related-links {
  padding: 3rem 0 0 2.5rem;
}

.related-links h2,
.hub-section h2 {
  margin-bottom: 1rem;
}

.related-links h2::after,
.hub-section h2::after,
.cta h2::after {
  display: none;
}

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

.related-card,
.hub-card {
  border: 1px solid var(--rule);
  border-radius: 1rem;
  padding: 1.1rem 1.15rem;
  background: var(--surface);
  transition: transform 0.3s var(--ease-out), border-color 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.related-card:hover,
.hub-card:hover {
  transform: translateY(-2px);
  border-color: rgba(var(--p-rgb), 0.28);
  box-shadow: 0 10px 30px rgba(var(--p-rgb), 0.08);
}

.related-card h3,
.hub-card h3 {
  font-size: 1.02rem;
  line-height: 1.4;
  margin-bottom: 0.35rem;
  color: var(--ink);
}

.related-card p,
.hub-card p {
  font-size: 0.96rem;
}

.card-eyebrow {
  display: inline-block;
  margin-bottom: 0.45rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--p);
}

.cta {
  position: relative;
  background: var(--ink);
  border-radius: 1rem;
  padding: 4rem 2.5rem;
  text-align: center;
  margin: 3.5rem 0 0 -2rem;
  overflow: visible;
}

.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(var(--p-rgb), 0.12) 0%, transparent 50%, rgba(var(--p-rgb), 0.06) 100%);
  pointer-events: none;
}

.cta::after {
  border-radius: inherit;
}

.cta h2 {
  position: relative;
  z-index: 1;
  color: #fff;
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.8rem;
  letter-spacing: -0.02em;
}

.cta p {
  position: relative;
  z-index: 1;
  max-width: 520px;
  margin: 0 auto 2rem;
  color: rgba(255, 255, 255, 0.58);
  font-size: 1.02rem;
}

.footer-nav {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.footer-nav span {
  color: var(--ink-tertiary);
}

footer {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--ink-tertiary);
  font-size: 0.875rem;
  border-top: 1px solid var(--rule);
}

footer a {
  color: var(--ink-secondary);
  font-weight: 500;
  transition: color 0.3s var(--ease-out);
}

footer a:hover {
  color: var(--p);
}

.fade-section,
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.fade-section .ed-section-body {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out) 0.1s, transform 0.6s var(--ease-out) 0.1s;
}

.fade-section.visible,
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-section.visible .ed-section-body {
  opacity: 1;
  transform: translateY(0);
}

.hero .badge,
.hero .hero-kicker,
.hero h1,
.hero p {
  opacity: 0;
  transform: translateY(24px);
  animation: hero-in 0.8s var(--ease-out) forwards;
}

.hero .badge,
.hero .hero-kicker {
  animation-delay: 0s;
}

.hero h1 {
  animation-delay: 0.15s;
}

.hero p {
  animation-delay: 0.3s;
}

@keyframes hero-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hub-main {
  max-width: 1100px;
}

.hub-main::before {
  display: none;
}

.hub-content {
  margin-left: 0;
  padding-top: 4rem;
}

.hub-section {
  padding: 0 0 2.5rem;
}

.hub-section + .hub-section {
  border-top: 1px solid var(--rule);
  padding-top: 2.5rem;
}

.hub-heading-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.8rem;
}

.hub-count {
  color: rgba(var(--p-rgb), 0.65);
  font-size: 1.1rem;
  font-style: italic;
}

.hub-intro {
  margin-bottom: 1.25rem;
}

@media (max-width: 900px) {
  .related-grid,
  .hub-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  nav {
    padding: 0.75rem 1.1rem;
    align-items: flex-start;
  }

  .nav-actions {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .hero {
    padding: 5rem 1.25rem 4rem;
  }

  .hero h1 {
    font-size: clamp(1.85rem, 7vw, 2.7rem);
  }

  .ed-main {
    padding: 0 1.25rem;
  }

  .ed-main::before {
    left: 1.25rem;
  }

  main {
    padding: 3rem 0 2rem;
    margin-left: 1.5rem;
  }

  .ed-section-inner,
  .related-links {
    padding-left: 1.5rem;
  }

  .ed-section-inner {
    padding-top: 2.2rem;
    padding-bottom: 2.2rem;
  }

  .ed-section-num {
    position: relative;
    left: auto;
    top: auto;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    display: block;
  }

  .ed-lead {
    font-size: 1.05rem;
    padding-left: 1rem;
  }

  .cta {
    padding: 3rem 1.5rem;
    border-radius: 0.75rem;
    margin-left: -1.5rem;
  }

  footer {
    padding: 2.5rem 1.25rem;
  }
}