:root {
  --ink: #16201f;
  --muted: #52605d;
  --paper: #f6f3ed;
  --surface: #fffdf8;
  --line: rgba(22, 32, 31, 0.16);
  --accent: #245f5a;
  --accent-deep: #143c39;
  --mark: #b56f2b;
  --shadow: 0 18px 48px rgba(20, 30, 28, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.58;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(104, 116, 116, 0.96);
  border-bottom: 1px solid rgba(255, 250, 240, 0.18);
  backdrop-filter: blur(14px);
  color: #fffaf0;
}

.nav {
  width: min(1120px, calc(100% - 40px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border: 2px solid rgba(255, 250, 240, 0.86);
  display: grid;
  place-items: center;
  font-size: 13px;
  color: #fffaf0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: rgba(255, 250, 240, 0.82);
  font-size: 0.94rem;
}

.nav-links a {
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: #fffaf0;
}

.nav-contact {
  border: 1px solid rgba(255, 250, 240, 0.42);
  padding: 9px 13px;
  color: #fffaf0 !important;
  background: rgba(255, 250, 240, 0.08);
}

main {
  overflow: hidden;
}

.section,
.hero {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  padding: clamp(70px, 9vw, 112px) 0 clamp(66px, 8vw, 96px);
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.05;
  letter-spacing: 0;
}

h1,
h2 {
  font-family: "Source Serif 4", Georgia, serif;
}

h1 {
  max-width: 960px;
  font-size: clamp(4.2rem, 9vw, 8.4rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.8rem);
}

h3 {
  font-size: 1rem;
}

.lead {
  max-width: 900px;
  margin: clamp(38px, 6vw, 70px) 0 0;
  color: var(--muted);
  font-size: clamp(1.45rem, 2.7vw, 2.15rem);
  line-height: 1.7;
}

.hero-feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: clamp(52px, 7vw, 78px);
  padding-top: clamp(44px, 6vw, 64px);
  border-top: 1px solid var(--line);
}

.hero-feature {
  min-width: 0;
  padding: 0 clamp(24px, 4vw, 64px);
  border-right: 1px solid var(--line);
}

.hero-feature:first-child {
  padding-left: 0;
}

.hero-feature:last-child {
  padding-right: 0;
  border-right: 0;
}

.hero-feature svg {
  display: block;
  width: 58px;
  height: 58px;
  margin-bottom: 30px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hero-feature h2 {
  max-width: 260px;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: clamp(1.55rem, 2.5vw, 2.05rem);
  font-weight: 800;
  line-height: 1.25;
}

.hero-feature p {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 1.8vw, 1.45rem);
  line-height: 1.65;
}

.section {
  padding: 78px 0;
  border-top: 1px solid var(--line);
}

.section-intro {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 48px;
  margin-bottom: 36px;
}

.section-intro p {
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.about-copy {
  display: grid;
  gap: 16px;
}

.about-copy p {
  margin: 0;
}

.principles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.principle {
  min-height: 180px;
  padding: clamp(26px, 4vw, 36px);
  border: 1px solid rgba(255, 253, 248, 0.12);
  background: #41575f;
  color: #fff7e8;
  box-shadow: 0 18px 42px rgba(20, 30, 28, 0.1);
  display: flex;
  align-items: flex-end;
}

.principle:nth-child(2) {
  background: #596b70;
}

.principle:nth-child(3) {
  background: #4f626b;
}

.principle:nth-child(4) {
  background: #687474;
}

.principle p {
  margin: 0;
  font-weight: 700;
  line-height: 1.32;
  color: #fffaf0;
  font-size: clamp(1.15rem, 2vw, 1.55rem);
}

.finding-list {
  display: grid;
  gap: 18px;
}

.finding {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  background: var(--surface);
  border: 1px solid var(--line);
}

.finding-label {
  padding: 24px;
  border-right: 1px solid var(--line);
}

.finding-label p {
  margin: 0;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.finding-body {
  padding: 24px;
}

.finding-body blockquote {
  margin: 0 0 22px;
  padding: 0 0 0 18px;
  border-left: 3px solid var(--accent);
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.45rem;
  line-height: 1.22;
}

.finding-body h3 {
  margin-top: 22px;
}

.finding-body p,
.finding-body ul {
  color: var(--muted);
}

.finding-body p {
  margin: 8px 0 0;
}

.finding-body ul {
  margin: 10px 0 0;
  padding-left: 20px;
}

.scope-grid,
.research-grid,
.resource-grid,
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

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

.plain-card,
.resource-card {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 24px;
}

.plain-card p,
.resource-card p {
  color: var(--muted);
}

.plain-card p:last-child,
.resource-card p:last-child {
  margin-bottom: 0;
}

#review .plain-card {
  position: relative;
  overflow: hidden;
  border-color: rgba(75, 94, 101, 0.22);
  box-shadow: 0 16px 36px rgba(65, 87, 95, 0.1);
}

#review .plain-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: #52636a;
}

#review .plain-card:nth-child(2)::before {
  background: #596b70;
}

#review .plain-card:nth-child(3)::before {
  background: #687474;
}

#review .plain-card h3 {
  color: #213334;
}

.research-page-body .plain-card,
.research-page-body .principle,
.research-page-body .finding {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid rgba(75, 94, 101, 0.22);
  color: var(--ink);
  box-shadow: 0 16px 36px rgba(65, 87, 95, 0.1);
}

.research-page-body .plain-card::before,
.research-page-body .principle::before,
.research-page-body .finding::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: #52636a;
}

.research-page-body .plain-card:nth-child(2)::before,
.research-page-body .principle:nth-child(2)::before {
  background: #596b70;
}

.research-page-body .plain-card:nth-child(3)::before,
.research-page-body .principle:nth-child(3)::before {
  background: #687474;
}

.research-page-body .plain-card:nth-child(4)::before,
.research-page-body .principle:nth-child(4)::before {
  background: #41575f;
}

.research-page-body .plain-card h3,
.research-page-body .principle p {
  color: #213334;
}

.research-page-body .principles {
  grid-template-columns: repeat(2, 1fr);
}

.research-page-body .principle {
  min-height: 150px;
  padding: 28px 28px 28px 34px;
  display: flex;
  align-items: center;
}

.research-page-body .principle p {
  font-size: clamp(1.1rem, 1.9vw, 1.45rem);
}

.research-page-body .finding-label {
  border-right-color: rgba(75, 94, 101, 0.18);
}

.resource-card a {
  color: var(--accent-deep);
  font-weight: 800;
  text-underline-offset: 5px;
}

.article-card {
  background: var(--surface);
  border: 1px solid var(--line);
  min-width: 0;
}

.article-image-link {
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #e8e2d6;
}

.article-image-link img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-card-body {
  padding: 24px;
}

.article-date {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.article-card h3 {
  font-size: clamp(1.25rem, 2vw, 1.65rem);
  line-height: 1.18;
}

.article-card h3 a {
  text-decoration: none;
}

.article-card h3 a:hover {
  text-decoration: underline;
  text-underline-offset: 5px;
}

.article-card-body p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.observations-note {
  display: grid;
  gap: 14px;
  justify-items: start;
  margin-top: 28px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.observations-note p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.quote-band {
  background: #41575f;
  color: #fffdf8;
}

.quote-band .section {
  border-top: 0;
}

.quote-band p {
  max-width: 850px;
  margin: 0;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1.08;
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 18px;
  align-items: stretch;
}

.contact-option {
  background: var(--surface);
  border: 1px solid rgba(75, 94, 101, 0.22);
  padding: 32px;
  box-shadow: 0 16px 36px rgba(65, 87, 95, 0.1);
}

div.contact-option {
  display: grid;
  align-content: start;
  justify-items: start;
  gap: 22px;
}

.contact-panel p {
  margin: 0;
  color: var(--muted);
}

.contact-form {
  display: grid;
  gap: 16px;
}

.contact-form label {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-weight: 800;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid rgba(75, 94, 101, 0.28);
  background: #fffdf8;
  color: var(--ink);
  font: inherit;
  padding: 12px 13px;
}

.contact-form textarea {
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid rgba(82, 99, 106, 0.24);
  border-color: #52636a;
}

.email-link {
  display: inline-flex;
  justify-content: center;
  border: 0;
  padding: 13px 16px;
  background: var(--accent);
  color: #fffdf8;
  text-decoration: none;
  font-weight: 800;
}

.article-page {
  overflow: visible;
}

.article-detail {
  width: min(920px, calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(56px, 8vw, 92px) 0 clamp(72px, 10vw, 120px);
}

.article-back-link {
  display: inline-flex;
  margin-bottom: 42px;
  color: var(--accent-deep);
  font-weight: 800;
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
}

.article-detail-header {
  margin-bottom: clamp(34px, 5vw, 56px);
}

.article-detail h1 {
  max-width: 900px;
  font-size: clamp(3rem, 7vw, 6.4rem);
}

.article-detail-date,
.article-loading {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
  font-weight: 700;
}

.article-detail-image {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  margin-bottom: clamp(42px, 6vw, 70px);
  border: 1px solid var(--line);
  background: var(--surface);
}

.article-content {
  max-width: 760px;
  color: var(--ink);
  font-size: clamp(1.08rem, 1.6vw, 1.24rem);
  line-height: 1.82;
}

.article-content h2,
.article-content h3,
.article-content h4 {
  margin: 2.1em 0 0.6em;
  font-family: "Source Serif 4", Georgia, serif;
  line-height: 1.12;
}

.article-content h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

.article-content h3,
.article-content h4 {
  font-size: clamp(1.45rem, 3vw, 2.1rem);
}

.article-content p,
.article-content ul,
.article-content blockquote {
  margin: 0 0 1.35em;
}

.article-content ul {
  padding-left: 1.2em;
}

.article-content blockquote {
  padding-left: 24px;
  border-left: 4px solid var(--accent);
  color: var(--accent-deep);
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  line-height: 1.28;
}

.article-content a {
  color: var(--accent-deep);
  font-weight: 700;
  text-underline-offset: 4px;
}

.site-footer {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 42px;
  color: var(--muted);
  font-size: 0.92rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--line);
}

.site-footer a {
  color: inherit;
  text-underline-offset: 4px;
}

@media (max-width: 900px) {
  .section-intro,
  .finding,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .hero-feature-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .hero-feature,
  .hero-feature:first-child,
  .hero-feature:last-child {
    padding: 28px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .hero-feature:first-child {
    padding-top: 0;
  }

  .hero-feature:last-child {
    padding-bottom: 0;
    border-bottom: 0;
  }

  .principles,
  .scope-grid,
  .research-grid,
  .resource-grid,
  .article-grid {
    grid-template-columns: 1fr 1fr;
  }

  .finding-label {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 640px) {
  .nav {
    width: min(100% - 28px, 1120px);
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 0;
  }

  .nav-links {
    width: 100%;
    flex-wrap: wrap;
    gap: 12px 16px;
  }

  .section,
  .hero,
  .site-footer {
    width: min(100% - 28px, 1120px);
  }

  .hero {
    padding-top: 64px;
  }

  h1 {
    font-size: clamp(3.2rem, 16vw, 4.7rem);
  }

  .lead {
    margin-top: 32px;
    font-size: 1.24rem;
    line-height: 1.55;
  }

  .principles,
  .scope-grid,
  .research-grid,
  .resource-grid,
  .article-grid {
    grid-template-columns: 1fr;
  }

  .principle {
    min-height: auto;
  }

  .site-footer {
    flex-direction: column;
  }
}