:root {
  --bg: #f7f5ee;
  --surface: #fcfbf7;
  --surface-strong: #f2eee4;
  --text: #14213d;
  --muted: #556173;
  --line: #d9d6cc;
  --accent: #4b6b8a;
  --accent-soft: #e6eef6;
  --shadow: 0 16px 40px rgba(20, 33, 61, 0.06);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f7f5ee 0%, #f4efe6 100%);
  line-height: 1.65;
  font-size: 16px;
}

img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

.page-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
}

.educational-banner {
  background: rgba(230, 238, 246, 0.6);
  border-bottom: 1px solid rgba(75, 107, 138, 0.2);
  padding: 1rem 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.educational-banner p {
  margin: 0;
}

.educational-banner a {
  color: var(--accent);
  text-decoration: underline;
  font-weight: 500;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 0;
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: 1rem;
}

.brand-logo {
  width: 2rem;
  height: 2rem;
  display: block;
}

.brand-logo-footer {
  width: 1.5rem;
  height: 1.5rem;
  display: block;
}

.brand-text { font-size: 1rem; }

.site-nav {
  display: flex;
  gap: 1.4rem;
  align-items: center;
}

.site-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--muted);
  position: relative;
  padding: 0.25rem 0;
}

.site-nav a.active, .site-nav a:hover {
  color: var(--text);
}

.site-nav a.active::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -0.2rem;
  width: 100%;
  height: 2px;
  background: var(--accent);
  border-radius: 999px;
}

.menu-toggle { display: none; }

.hero {
  padding: 3rem 0 4rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.2rem;
  align-items: center;
  padding: 2.2rem;
  border: 1px solid rgba(217, 214, 204, 0.85);
  border-radius: calc(var(--radius-lg) + 4px);
  background: rgba(252, 251, 247, 0.95);
  box-shadow: var(--shadow);
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 4vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin: 0 0 1rem;
  max-width: 12ch;
}

.hero p {
  font-size: 1.07rem;
  color: var(--muted);
  margin: 0 0 1.7rem;
  max-width: 62ch;
}

.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--text);
  color: white;
  padding: 0.7rem 0.95rem;
  border-radius: 999px;
  z-index: 1000;
}

.skip-link:focus {
  top: 1rem;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.btn {
  display: inline-block;
  padding: 0.9rem 1.2rem;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid var(--line);
  transition: all 180ms ease;
}

.btn-primary {
  background: var(--text);
  color: white;
  border-color: var(--text);
}

.btn-secondary { background: transparent; color: var(--text); }

.btn:hover { transform: translateY(-1px); }

.video-shell {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: #2a2a2a;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 9 / 16;
}

.video-shell video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #1a1a1a;
}

.video-caption {
  padding: 0.9rem 1rem 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.section {
  padding: 2.8rem 0;
}

.section.bg-subtle {
  background: rgba(230, 238, 246, 0.25);
  padding: 2.8rem 0;
}

.section-intro {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.4rem;
}

.section-title {
  font-size: 1.35rem;
  margin: 0;
  letter-spacing: -0.02em;
}

.section-copy {
  color: var(--muted);
  margin: 0.25rem 0 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.1rem;
}

.card {
  background: rgba(252, 251, 247, 0.96);
  border: 1px solid rgba(217, 214, 204, 0.8);
  border-radius: var(--radius-md);
  padding: 1.3rem;
  box-shadow: 0 8px 24px rgba(20, 33, 61, 0.04);
}

.card h3, .card h2 {
  margin: 0 0 0.6rem;
  font-size: 1.06rem;
  letter-spacing: -0.02em;
}

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

.grid-2 {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.2rem;
}

.panel {
  background: rgba(252, 251, 247, 0.96);
  border: 1px solid rgba(217, 214, 204, 0.82);
  border-radius: var(--radius-md);
  padding: 1.4rem;
}

.panel h2, .panel h3 { margin-top: 0; }

.list-tight { padding-left: 1rem; color: var(--muted); }
.list-tight li { margin-bottom: 0.45rem; }

.faq-item {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(252, 251, 247, 0.96);
  overflow: hidden;
  margin-bottom: 0.8rem;
}

.faq-question {
  width: 100%;
  border: 0;
  background: transparent;
  text-align: left;
  padding: 1.1rem 1.2rem;
  font: inherit;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: background 180ms ease;
}

.faq-question:hover {
  background: rgba(75, 107, 138, 0.04);
}

.faq-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  transition: transform 200ms ease;
}

.faq-item.active .faq-question {
  color: var(--accent);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 1.2rem 1.1rem;
  color: var(--muted);
  display: none;
  animation: slideDown 200ms ease;
}

.faq-item.active .faq-answer {
  display: block;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.faq-answer p {
  margin: 0 0 0.8rem;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.site-footer {
  margin-top: auto;
  border-top: 1px solid rgba(217, 214, 204, 0.8);
  padding: 2.4rem 0 2rem;
  background: rgba(252, 251, 247, 0.72);
}

.footer-grid {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.4rem;
}

.footer-brand-block {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  width: fit-content;
  margin-bottom: 0.4rem;
}

.footer-section { }

.footer-title {
  font-size: 0.9rem;
  margin: 0 0 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.5rem;
  color: var(--muted);
}

.footer-links a {
  color: var(--muted);
  font-size: 0.95rem;
  transition: color 180ms ease;
}

.footer-links a:hover {
  color: var(--text);
}

.footer-copy { 
  color: var(--muted); 
  margin: 0.4rem 0;
  font-size: 0.9rem;
}

.footer-contact {
  color: var(--muted);
  margin: 1rem 0 0 0;
  font-size: 0.95rem;
}

.footer-contact a {
  color: var(--accent);
  text-decoration: underline;
}

.footer-bottom {
  width: min(var(--container), calc(100% - 2rem));
  margin: 2rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid rgba(217, 214, 204, 0.6);
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

.footer-bottom p {
  margin: 0.3rem 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.article-page, .content-page {
  padding: 1.6rem 0 4rem;
}

.article-page .content-block {
  width: min(760px, calc(100% - 2rem));
  margin: 0 auto;
}

.content-block h1 {
  font-size: clamp(2rem, 3.4vw, 2.8rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
}

.content-block .lead {
  font-size: 1.08rem;
  color: var(--muted);
  margin-bottom: 1.9rem;
}

.content-block p, .content-block li {
  color: var(--muted);
}

.content-block .meta {
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1.4rem;
  font-size: 0.95rem;
}

blockquote {
  margin: 1.6rem 0;
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 14px 14px 0;
  color: var(--text);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-bottom: 1rem;
  align-items: center;
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
}

.article-card {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.article-card .article-image {
  height: 180px;
  border-radius: 12px;
  background: linear-gradient(135deg, #eff4f8 0%, #e7ecef 100%);
  border: 1px solid var(--line);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.article-card .article-image::before {
  content: 'Research';
  display: inline-flex;
  position: absolute;
  margin: 1rem;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.9);
  color: var(--text);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  background: rgba(75, 107, 138, 0.1);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
}

.highlight-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.2rem;
}

@media (max-width: 900px) {
  .highlight-grid { grid-template-columns: 1fr; }
  .hero-grid, .grid-2 { grid-template-columns: 1fr; }
  .hero-grid { gap: 1.6rem; }
  .card-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .site-header { position: relative; }
  .menu-toggle {
    display: inline-flex;
    flex-direction: column;
    gap: 0.25rem;
    border: 0;
    background: transparent;
    padding: 0.35rem;
  }
  .menu-toggle span {
    width: 1.4rem;
    height: 2px;
    background: var(--text);
    border-radius: 999px;
  }
  .site-nav {
    position: absolute;
    top: calc(100% + 0.65rem);
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    background: rgba(252, 251, 247, 0.98);
    padding: 0.9rem 1rem;
    border: 1px solid var(--line);
    border-radius: 14px;
    box-shadow: var(--shadow);
    display: none;
    min-width: 170px;
  }
  .site-nav.open { display: flex; }
  .hero { padding-top: 1rem; }
  .hero-grid { padding: 1.3rem; }
  .card-grid, .footer-grid { grid-template-columns: 1fr; }
  .section-intro { flex-direction: column; align-items: flex-start; }
  .video-shell {
    max-width: 280px;
    margin: 0 auto;
  }
}

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