:root {
  color-scheme: light;
  --color-ivory: #fbf7ef;
  --color-paper: #fffdf8;
  --color-cream: #f1e6d7;
  --color-teal: #146c72;
  --color-teal-dark: #0d4e55;
  --color-sage: #dce6d9;
  --color-terracotta: #b6654b;
  --color-terracotta-dark: #8f4735;
  --color-charcoal: #253032;
  --color-muted: #66706f;
  --color-line: #e2d7c8;
  --shadow-soft: 0 18px 42px rgba(37, 48, 50, 0.12);
  --radius: 8px;
  --container: 1120px;
  --space-1: 0.35rem;
  --space-2: 0.65rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4.5rem;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--color-ivory);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--color-charcoal);
  background: var(--color-ivory);
  font-size: 16px;
  line-height: 1.65;
}

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

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

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

:focus-visible {
  outline: 3px solid rgba(20, 108, 114, 0.38);
  outline-offset: 3px;
}

.container {
  width: min(100%, var(--container));
  margin-inline: auto;
  padding-inline: 1rem;
}

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 20;
  transform: translateY(-150%);
  padding: 0.7rem 1rem;
  border-radius: var(--radius);
  color: #fff;
  background: var(--color-teal-dark);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(37, 48, 50, 0.12);
  background: rgba(251, 247, 239, 0.94);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  gap: 0.8rem;
  color: var(--color-charcoal);
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  flex: 0 0 auto;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: #fff;
  background: var(--color-teal);
  font-weight: 800;
  line-height: 1;
}

.brand-text {
  display: grid;
  min-width: 0;
  line-height: 1.2;
}

.brand-text span {
  font-weight: 800;
}

.brand-text small {
  max-width: 30ch;
  color: var(--color-muted);
  font-size: 0.76rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.site-nav a {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius);
  padding: 0.55rem 0.72rem;
  color: var(--color-charcoal);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-teal-dark);
  background: rgba(20, 108, 114, 0.1);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-paper);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  background: var(--color-charcoal);
}

.hero {
  padding: var(--space-7) 0 var(--space-6);
  background:
    linear-gradient(180deg, rgba(220, 230, 217, 0.7), rgba(251, 247, 239, 0)),
    var(--color-ivory);
}

.hero-grid {
  display: grid;
  align-items: center;
  grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.98fr);
  gap: var(--space-6);
}

.hero-grid > *,
.content-grid > * {
  min-width: 0;
}

.hero-copy {
  min-width: 0;
  max-width: 720px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 var(--space-3);
  color: var(--color-terracotta-dark);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0;
}

.eyebrow::before {
  content: "";
  width: 32px;
  height: 2px;
  background: var(--color-terracotta);
}

h1,
h2,
h3 {
  margin: 0 0 var(--space-3);
  color: var(--color-charcoal);
  line-height: 1.12;
  letter-spacing: 0;
}

h1 {
  max-width: 12ch;
  font-size: 3.15rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.25rem;
}

p {
  margin: 0 0 var(--space-3);
}

.lead {
  color: #394649;
  font-size: 1.2rem;
  line-height: 1.7;
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: var(--space-4);
}

.button,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  padding: 0.72rem 1rem;
  font-weight: 800;
  text-decoration: none;
}

.button {
  color: #fff;
  background: var(--color-teal);
}

.button:hover {
  color: #fff;
  background: var(--color-teal-dark);
}

.button-secondary {
  color: var(--color-teal-dark);
  border-color: rgba(20, 108, 114, 0.28);
  background: var(--color-paper);
}

.button-secondary:hover {
  color: var(--color-terracotta-dark);
  border-color: rgba(182, 101, 75, 0.4);
}

.page-visual {
  margin: 0;
}

.page-visual img,
.hero-visual img {
  width: 100%;
  border: 1px solid rgba(37, 48, 50, 0.12);
  border-radius: var(--radius);
  background: var(--color-paper);
  box-shadow: var(--shadow-soft);
}

.hero-visual {
  margin: 0;
}

.section {
  padding: var(--space-7) 0;
}

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

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

.section-heading {
  min-width: 0;
  max-width: 760px;
  margin-bottom: var(--space-5);
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: var(--space-6);
  align-items: start;
}

.prose {
  min-width: 0;
  max-width: 780px;
}

.hero-copy,
.section-heading,
.prose {
  overflow-wrap: break-word;
}

.prose h2,
.prose h3 {
  margin-top: var(--space-5);
}

.prose ul,
.prose ol {
  padding-left: 1.25rem;
  margin: 0 0 var(--space-4);
}

.prose li {
  margin-bottom: 0.55rem;
}

.notice,
.question-box,
.reality-check {
  border-left: 4px solid var(--color-teal);
  border-radius: var(--radius);
  padding: var(--space-4);
  background: var(--color-paper);
  box-shadow: 0 10px 28px rgba(37, 48, 50, 0.07);
}

.question-box {
  border-left-color: var(--color-terracotta);
}

.reality-check {
  border-left-color: var(--color-teal-dark);
  background: #f7fbf6;
}

.notice strong,
.question-box strong,
.reality-check strong {
  display: block;
  margin-bottom: 0.35rem;
}

.notice small {
  display: block;
  margin-top: 0.55rem;
  color: var(--color-muted);
  font-weight: 700;
}

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

.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.cluster-grid,
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.guide-card {
  display: grid;
  gap: var(--space-2);
}

.chapter-card {
  overflow: hidden;
  border: 1px solid rgba(37, 48, 50, 0.13);
  border-radius: var(--radius);
  background: var(--color-paper);
  box-shadow: 0 10px 24px rgba(37, 48, 50, 0.06);
}

.chapter-card__image {
  display: block;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background: var(--color-cream);
}

.chapter-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.chapter-card__body {
  padding: var(--space-4);
}

.chapter-card h3 {
  font-size: 1.08rem;
}

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

.chapter-card h3 a:hover {
  color: var(--color-teal-dark);
}

.chapter-card p {
  color: var(--color-muted);
  font-size: 0.95rem;
}

.intent-pill {
  width: fit-content;
  margin: 0;
  border: 1px solid rgba(20, 108, 114, 0.22);
  border-radius: 999px;
  padding: 0.35rem 0.65rem;
  color: var(--color-teal-dark);
  background: rgba(20, 108, 114, 0.08);
  font-size: 0.82rem;
  font-weight: 800;
}

.cluster-card,
.related-card {
  display: block;
  min-height: 100%;
  border: 1px solid rgba(37, 48, 50, 0.13);
  border-radius: var(--radius);
  padding: var(--space-4);
  background: var(--color-paper);
  box-shadow: 0 10px 24px rgba(37, 48, 50, 0.06);
}

.cluster-card h3,
.related-card strong {
  display: block;
  margin-bottom: var(--space-2);
}

.cluster-card p,
.related-card p {
  color: var(--color-muted);
  font-size: 0.95rem;
}

.cluster-card ul {
  display: grid;
  gap: 0.45rem;
  padding-left: 1.1rem;
  margin: var(--space-3) 0 0;
}

.related-card {
  color: var(--color-charcoal);
  text-decoration: none;
}

.related-card span {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--color-terracotta-dark);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.related-card:hover {
  border-color: rgba(20, 108, 114, 0.34);
  color: var(--color-charcoal);
  transform: translateY(-2px);
}

.tool-panel {
  margin: var(--space-5) 0;
  border: 1px solid rgba(37, 48, 50, 0.13);
  border-radius: var(--radius);
  padding: var(--space-4);
  background: var(--color-paper);
  box-shadow: 0 10px 28px rgba(37, 48, 50, 0.07);
}

.tool-panel h2 {
  margin-top: 0;
}

.worksheet {
  display: grid;
  gap: 0.7rem;
  margin: var(--space-3) 0;
}

.worksheet label {
  display: grid;
  grid-template-columns: 1.15rem minmax(0, 1fr);
  gap: 0.65rem;
  align-items: start;
  border: 1px solid rgba(37, 48, 50, 0.12);
  border-radius: var(--radius);
  padding: 0.78rem;
  background: #fbf7ef;
}

.worksheet input {
  width: 1.05rem;
  height: 1.05rem;
  margin-top: 0.22rem;
  accent-color: var(--color-teal);
}

.print-button {
  margin-top: var(--space-2);
}

.resource-panel {
  margin: var(--space-5) 0;
  border: 1px solid rgba(20, 108, 114, 0.18);
  border-radius: var(--radius);
  padding: var(--space-4);
  background: #f7fbf6;
}

.resource-panel .section-heading {
  margin-bottom: var(--space-4);
}

.resource-panel .section-heading p:last-child {
  margin-bottom: 0;
}

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

.resource-group {
  min-width: 0;
}

.resource-group h3 {
  margin-bottom: var(--space-2);
  font-size: 1.05rem;
}

.resource-group ul {
  display: grid;
  gap: var(--space-3);
  padding: 0;
  margin: 0;
  list-style: none;
}

.resource-group li {
  margin: 0;
  border-top: 1px solid rgba(37, 48, 50, 0.1);
  padding-top: var(--space-3);
}

.resource-group li:first-child {
  border-top: 0;
  padding-top: 0;
}

.resource-group a {
  font-weight: 800;
}

.resource-group p {
  margin: 0.25rem 0 0;
  color: var(--color-muted);
  font-size: 0.94rem;
}

.timeline {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-4) 0;
}

.timeline article {
  position: relative;
  border: 1px solid rgba(37, 48, 50, 0.13);
  border-radius: var(--radius);
  padding: var(--space-4);
  background: var(--color-paper);
}

.timeline span {
  display: inline-block;
  margin-bottom: var(--space-2);
  color: var(--color-terracotta-dark);
  font-size: 0.82rem;
  font-weight: 900;
  text-transform: uppercase;
}

.two-column-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  padding: 0;
  list-style: none;
}

.two-column-list li {
  min-height: 100%;
  border: 1px solid rgba(37, 48, 50, 0.12);
  border-radius: var(--radius);
  padding: var(--space-4);
  background: var(--color-paper);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-4) 0;
  background: var(--color-paper);
}

.comparison-table caption {
  margin-bottom: var(--space-2);
  color: var(--color-muted);
  text-align: left;
}

.comparison-table th,
.comparison-table td {
  border: 1px solid var(--color-line);
  padding: 0.8rem;
  text-align: left;
  vertical-align: top;
}

.comparison-table th {
  background: #edf5ef;
}

.faq-list {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.faq-list details {
  border: 1px solid rgba(37, 48, 50, 0.13);
  border-radius: var(--radius);
  padding: var(--space-3) var(--space-4);
  background: var(--color-paper);
}

.faq-list summary {
  cursor: pointer;
  color: var(--color-charcoal);
  font-weight: 800;
}

.faq-list p {
  margin-top: var(--space-2);
  margin-bottom: 0;
}

.breadcrumb {
  padding-top: var(--space-4);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0;
  margin: 0;
  list-style: none;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 0.4rem;
  color: var(--color-muted);
}

.chapter-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.chapter-nav__link {
  min-height: 96px;
  border: 1px solid rgba(20, 108, 114, 0.2);
  border-radius: var(--radius);
  padding: var(--space-4);
  color: var(--color-charcoal);
  background: var(--color-paper);
  text-decoration: none;
}

.chapter-nav__link--next {
  text-align: right;
}

.chapter-nav__link span {
  display: block;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.chapter-nav__link strong {
  display: block;
  margin-top: var(--space-1);
}

.site-footer {
  padding: var(--space-6) 0 var(--space-4);
  color: #eaf4ef;
  background: var(--color-charcoal);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.75fr 0.85fr 1fr;
  gap: var(--space-5);
}

.footer-brand {
  display: inline-block;
  margin-bottom: var(--space-2);
  color: #fff;
  font-weight: 900;
  text-decoration: none;
}

.site-footer h2 {
  margin-bottom: var(--space-2);
  color: #fff;
  font-size: 1rem;
}

.site-footer p {
  color: #d1ddd9;
  font-size: 0.95rem;
}

.site-footer nav a,
.site-footer .text-link {
  display: block;
  width: fit-content;
  color: #f4d7c5;
  margin-bottom: 0.45rem;
}

.footer-bottom {
  margin-top: var(--space-5);
  padding-top: var(--space-3);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-bottom p {
  margin: 0;
}

@media (max-width: 980px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    inset: 76px 1rem auto 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    padding: var(--space-2);
    background: var(--color-paper);
    box-shadow: var(--shadow-soft);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    justify-content: flex-start;
  }

  .hero-grid,
  .content-grid {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .guide-grid,
  .cluster-grid,
  .related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 680px) {
  body {
    font-size: 15px;
  }

  .container {
    width: min(100%, var(--container));
    padding-inline: 0.625rem;
  }

  .header-inner {
    min-height: 70px;
    gap: var(--space-2);
  }

  .brand {
    gap: 0.55rem;
  }

  .brand-text small {
    display: none;
  }

  .brand-text span {
    font-size: 0.95rem;
    line-height: 1.15;
  }

  .site-nav {
    inset: 70px 0.625rem auto 0.625rem;
  }

  .hero {
    padding-top: var(--space-5);
  }

  .hero-copy,
  .section-heading,
  .prose,
  .hero-visual,
  .page-visual {
    width: 100%;
    max-width: calc(100vw - 1.25rem);
  }

  h1 {
    max-width: 11ch;
    font-size: 2.28rem;
  }

  h2 {
    font-size: 1.65rem;
  }

  .lead {
    font-size: 1.05rem;
  }

  .section {
    padding: var(--space-6) 0;
  }

  .chapter-grid,
  .guide-grid,
  .cluster-grid,
  .related-grid,
  .resource-grid,
  .two-column-list,
  .chapter-nav {
    grid-template-columns: 1fr;
  }

  .chapter-nav__link--next {
    text-align: left;
  }

  .hero-actions .button,
  .hero-actions .button-secondary,
  .button-row .button,
  .button-row .button-secondary {
    width: 100%;
  }

  .comparison-table {
    display: block;
    overflow-x: auto;
  }
}

@media print {
  .site-header,
  .site-footer,
  .hero-actions,
  .button,
  .button-secondary,
  .nav-toggle,
  .breadcrumb {
    display: none !important;
  }

  body {
    color: #111;
    background: #fff;
  }

  .section,
  .hero {
    padding: 1rem 0;
    background: #fff !important;
  }

  .container {
    width: 100%;
  }

  .page-visual,
  .hero-visual {
    display: none;
  }
}