:root {
  color-scheme: light;
  --teal: #003D4D;
  --teal-2: #0A5A66;
  --teal-soft: #D8ECEB;
  --champagne: #F7E7CE;
  --page-bg: #F7E7CE;
  --paper: #FFF7E9;
  --ink: #003D4D;
  --muted: #3E6870;
  --gold: #B5944F;
  --gold-dark: #80622B;
  --rule: rgba(0, 61, 77, 0.22);
  --shadow: 0 28px 70px rgba(0, 61, 77, 0.16);
  --grid-line-a: rgba(0, 61, 77, 0.045);
  --grid-line-b: rgba(0, 61, 77, 0.035);
  --panel-rule: rgba(247, 231, 206, 0.34);
  --seal-opacity: 0.24;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --teal: #003D4D;
  --teal-2: #0A5A66;
  --teal-soft: #0F5C64;
  --champagne: #F7E7CE;
  --page-bg: #003D4D;
  --paper: #07313B;
  --ink: #F7E7CE;
  --muted: #BFD8D3;
  --gold: #E7C977;
  --gold-dark: #E7C977;
  --rule: rgba(247, 231, 206, 0.24);
  --shadow: 0 28px 70px rgba(0, 0, 0, 0.28);
  --grid-line-a: rgba(247, 231, 206, 0.06);
  --grid-line-b: rgba(247, 231, 206, 0.04);
  --panel-rule: rgba(247, 231, 206, 0.38);
  --seal-opacity: 0.18;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background-color: var(--page-bg);
  color: var(--ink);
  font-family: "Source Sans 3", system-ui, sans-serif;
  font-size: 18px;
  line-height: 1.5;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(var(--grid-line-a) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-b) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), transparent 72%);
}

a {
  color: inherit;
}

a:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 5px;
}

button:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 5px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 10;
  transform: translateY(-160%);
  background: var(--teal);
  color: var(--champagne);
  padding: 10px 14px;
  font-weight: 800;
}

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

.site-header,
.site-footer,
main {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 22px;
  padding: 24px 0 18px;
  border-bottom: 1px solid var(--rule);
}

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 2px solid var(--teal);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  flex: 0 0 auto;
}

.theme-toggle:hover {
  background: color-mix(in srgb, var(--ink) 9%, transparent);
}

.theme-icon {
  width: 21px;
  height: 21px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-icon-sun {
  display: none;
}

:root[data-theme="dark"] .theme-icon-moon {
  display: none;
}

:root[data-theme="dark"] .theme-icon-sun {
  display: block;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 900;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 2px solid var(--teal);
  border-radius: 50%;
  font-family: Fraunces, Georgia, serif;
  line-height: 1;
}

:root[data-theme="dark"] .brand-mark,
:root[data-theme="dark"] .theme-toggle {
  border-color: var(--ink);
}

.primary-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(14px, 3vw, 34px);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.primary-nav a {
  text-decoration-thickness: 1px;
  text-underline-offset: 7px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(280px, 0.62fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: stretch;
  min-height: min(760px, calc(100svh - 92px));
  padding: clamp(44px, 7vw, 86px) 0 clamp(36px, 6vw, 72px);
}

.hero-copy {
  align-self: end;
}

.eyebrow,
.section-kicker,
.panel-label,
.document-label {
  margin: 0;
  color: var(--gold-dark);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: Fraunces, Georgia, serif;
  margin: 0;
  letter-spacing: 0;
}

h1 {
  max-width: 760px;
  margin-top: 18px;
  font-size: clamp(4rem, 10vw, 9.6rem);
  line-height: 0.86;
}

h2 {
  font-size: clamp(2.2rem, 5vw, 5.7rem);
  line-height: 0.94;
}

h3 {
  font-size: clamp(1.45rem, 2.4vw, 2.2rem);
  line-height: 1.02;
}

.hero-intro {
  max-width: 670px;
  margin: 28px 0 0;
  font-size: clamp(1.25rem, 2.4vw, 2rem);
  line-height: 1.25;
  font-weight: 700;
}

.hero-note {
  max-width: 610px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.4vw, 1.2rem);
}

.hero-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-self: end;
  min-height: 520px;
  padding: clamp(24px, 4vw, 42px);
  overflow: hidden;
  background-color: var(--teal);
  color: var(--champagne);
  box-shadow: var(--shadow);
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid var(--panel-rule);
}

.seal {
  position: absolute;
  top: clamp(24px, 5vw, 42px);
  right: clamp(20px, 4vw, 38px);
  width: min(52%, 220px);
  opacity: var(--seal-opacity);
}

.panel-label,
.document-label {
  color: var(--gold);
}

.panel-statement {
  position: relative;
  z-index: 1;
  max-width: 360px;
  margin: 0;
  font-family: Fraunces, Georgia, serif;
  font-size: clamp(1.7rem, 3.2vw, 3.2rem);
  line-height: 0.98;
}

.method-section,
.product-section,
.official-section {
  border-top: 1px solid var(--rule);
  padding: clamp(56px, 8vw, 100px) 0;
}

.method-section h2 {
  max-width: 900px;
  margin-top: 12px;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: clamp(34px, 5vw, 62px);
  border-top: 2px solid var(--teal);
  border-bottom: 1px solid var(--rule);
}

.method-grid article {
  min-height: 260px;
  padding: clamp(22px, 3vw, 34px);
  border-right: 1px solid var(--rule);
}

.method-grid article:last-child {
  border-right: 0;
}

.method-number {
  display: block;
  margin-bottom: clamp(34px, 5vw, 64px);
  color: var(--gold-dark);
  font-weight: 900;
  letter-spacing: 0.14em;
}

.method-grid p,
.product-copy p,
.official-section p,
.product-document dd {
  color: var(--muted);
}

.product-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.7fr);
  gap: clamp(30px, 6vw, 86px);
  align-items: center;
}

.product-copy p {
  max-width: 660px;
  margin: 22px 0 0;
  font-size: clamp(1.05rem, 1.5vw, 1.28rem);
}

.button-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 34px;
  background: var(--teal);
  color: var(--champagne);
  padding: 15px 20px;
  font-weight: 900;
  letter-spacing: 0.05em;
  text-decoration: none;
  text-transform: uppercase;
}

:root[data-theme="dark"] .button-link {
  background: var(--gold);
  color: var(--teal);
}

.button-link span {
  transition: transform 180ms ease;
}

.button-link:hover span {
  transform: translateX(4px);
}

.product-document {
  background: var(--paper);
  padding: clamp(26px, 4vw, 44px);
  border: 1px solid var(--rule);
  box-shadow: var(--shadow);
}

.document-rule {
  height: 10px;
  margin-bottom: 28px;
  border-top: 2px solid var(--teal);
  border-bottom: 1px solid var(--gold);
}

.product-document dl {
  display: grid;
  gap: 26px;
  margin: 24px 0 0;
}

.product-document div {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
}

.product-document dt {
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.product-document dd {
  margin: 0;
}

.official-section {
  display: grid;
  grid-template-columns: 0.8fr 1fr;
  gap: clamp(28px, 6vw, 90px);
}

.official-section p {
  margin: 0;
  font-size: clamp(1.08rem, 1.7vw, 1.38rem);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 28px 0 42px;
  border-top: 2px solid var(--teal);
  font-size: 0.98rem;
  font-weight: 700;
}

.site-footer p {
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.footer-links a {
  text-underline-offset: 5px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .primary-nav {
    justify-content: flex-start;
  }

  .theme-toggle {
    position: absolute;
    right: 0;
    top: 24px;
  }

  .hero,
  .product-section,
  .official-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 0;
  }

  .hero-panel {
    min-height: 390px;
  }

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

  .method-grid article {
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }

  .method-grid article:last-child {
    border-bottom: 0;
  }

  .method-number {
    margin-bottom: 22px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .site-header,
  .site-footer,
  main {
    width: min(100% - 28px, 1180px);
  }

  .site-header {
    position: relative;
    padding-right: 54px;
  }

  .primary-nav {
    gap: 12px;
    font-size: 0.8rem;
  }

  h1 {
    font-size: clamp(3.25rem, 18vw, 4.8rem);
  }

  .hero-panel {
    min-height: 340px;
  }

  .product-document div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .button-link {
    width: 100%;
    justify-content: center;
    text-align: center;
  }
}