@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,600;1,8..60,400&family=JetBrains+Mono:wght@400;500;600&display=swap');

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

:root {
  --cyan:   #005E7A;
  --paper:  #FAFAFA;
  --magenta:#9E0059;
  --yellow: #FFC700;
  --ink:    #0F0F0F;
  --mid:    #3A3A3A;
  --light:  #E8EEF1;
  --border: #D1DCE2;
  --sans:   'Inter', sans-serif;
  --serif:  'Source Serif 4', Georgia, serif;
  --mono:   'JetBrains Mono', 'Courier New', monospace;
  --max:    1200px;
  --r:      4px;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--serif);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { list-style: none; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }

/* ============ TYPOGRAPHY ============ */
h1, h2, h3, h4, h5 {
  font-family: var(--sans);
  font-weight: 800;
  line-height: 1.2;
  color: var(--ink);
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.1rem; font-weight: 700; }

.mono { font-family: var(--mono); font-size: 0.875rem; color: var(--cyan); }
.label {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--magenta);
}
.lead {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  line-height: 1.65;
  color: var(--mid);
  max-width: 65ch;
}

/* ============ SITE HEADER ============ */
.site-header {
  background: var(--ink);
  color: var(--paper);
  position: sticky;
  top: 0;
  z-index: 900;
  border-bottom: 3px solid var(--cyan);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  max-width: var(--max);
  margin: 0 auto;
  gap: 1rem;
}
.site-logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
  text-decoration: none;
}
.logo-main {
  font-family: var(--sans);
  font-weight: 900;
  font-size: 1.15rem;
  color: var(--paper);
  letter-spacing: -0.02em;
}
.logo-sub {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--yellow);
  letter-spacing: 0.08em;
}
.nav-desktop { display: flex; align-items: center; gap: 0.25rem; }
.nav-desktop a {
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 600;
  color: rgba(250,250,250,0.8);
  padding: 0.4rem 0.7rem;
  border-radius: var(--r);
  transition: color 0.2s, background 0.2s;
  text-decoration: none;
}
.nav-desktop a:hover { color: var(--paper); background: rgba(255,255,255,0.08); }
.nav-desktop a.active { color: var(--yellow); }

.nav-cta {
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--cyan);
  color: var(--paper) !important;
  padding: 0.45rem 1rem !important;
  border-radius: 2rem;
}
.nav-cta:hover { background: #007a9e !important; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0.25rem;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--paper);
  border-radius: 2px;
  transition: all 0.3s;
}
.mobile-nav {
  display: none;
  background: #1a1a1a;
  border-top: 1px solid #333;
}
.mobile-nav a {
  display: block;
  font-family: var(--sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: rgba(250,250,250,0.85);
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid #2a2a2a;
  text-decoration: none;
}
.mobile-nav a:hover { background: rgba(255,255,255,0.05); }
.mobile-nav.open { display: block; }

/* ============ SITE FOOTER ============ */
.site-footer {
  background: var(--ink);
  color: rgba(250,250,250,0.7);
  padding: 4rem 0 2rem;
  margin-top: 5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid #2a2a2a;
}
.footer-brand .logo-main { font-size: 1.3rem; margin-bottom: 0.5rem; }
.footer-brand .logo-sub { margin-bottom: 1rem; }
.footer-brand p {
  font-family: var(--sans);
  font-size: 0.825rem;
  line-height: 1.6;
  color: rgba(250,250,250,0.55);
  max-width: 32ch;
}
.footer-col h5 {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--yellow);
  margin-bottom: 1rem;
}
.footer-col a {
  display: block;
  font-family: var(--sans);
  font-size: 0.8rem;
  color: rgba(250,250,250,0.6);
  margin-bottom: 0.5rem;
  text-decoration: none;
}
.footer-col a:hover { color: var(--paper); }
.footer-bottom {
  padding-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: flex-start;
}
.footer-disclaimer {
  font-family: var(--sans);
  font-size: 0.72rem;
  line-height: 1.6;
  color: rgba(250,250,250,0.4);
  max-width: 70ch;
}
.footer-copy {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: rgba(250,250,250,0.3);
  white-space: nowrap;
}

/* ============ COOKIE BANNER ============ */
#cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #1a1a1a;
  border-top: 2px solid var(--cyan);
  padding: 1rem 1.25rem;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
#cookie-banner p {
  font-family: var(--sans);
  font-size: 0.8rem;
  color: rgba(250,250,250,0.8);
  max-width: 65ch;
}
.cookie-actions { display: flex; gap: 0.5rem; flex-shrink: 0; }
.btn-cookie-accept {
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 700;
  background: var(--cyan);
  color: var(--paper);
  border: none;
  padding: 0.5rem 1.25rem;
  border-radius: 2rem;
  cursor: pointer;
}
.btn-cookie-accept:hover { background: #007a9e; }
.btn-cookie-more {
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 600;
  background: transparent;
  color: rgba(250,250,250,0.7);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 0.5rem 1rem;
  border-radius: 2rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.btn-cookie-more:hover { border-color: rgba(255,255,255,0.5); }

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 0.875rem;
  padding: 0.75rem 1.75rem;
  border-radius: 2rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  letter-spacing: 0.01em;
}
.btn-primary { background: var(--cyan); color: var(--paper); }
.btn-primary:hover { background: #007a9e; text-decoration: none; }
.btn-outline { background: transparent; color: var(--cyan); border: 2px solid var(--cyan); }
.btn-outline:hover { background: var(--cyan); color: var(--paper); text-decoration: none; }
.btn-dark { background: var(--ink); color: var(--paper); }
.btn-dark:hover { background: #2a2a2a; text-decoration: none; }
.btn-sm { font-size: 0.8rem; padding: 0.5rem 1.1rem; }

/* ============ SCROLL ANIMATIONS ============ */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ============ SECTION COMMON ============ */
.section { padding: 5rem 0; }
.section-alt { background: var(--light); }
.section-dark { background: var(--ink); color: var(--paper); }
.section-dark h2, .section-dark h3 { color: var(--paper); }
.section-header { margin-bottom: 3rem; }
.section-header .label { margin-bottom: 0.75rem; display: block; }
.section-header h2 { margin-bottom: 1rem; }
.section-header p { max-width: 60ch; color: var(--mid); font-family: var(--sans); font-size: 0.95rem; }
.section-dark .section-header p { color: rgba(250,250,250,0.65); }

/* ============ HERO ============ */
.hero {
  background: var(--ink);
  color: var(--paper);
  padding: 5rem 0 0;
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: end;
}
.hero-content { padding-bottom: 4rem; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--yellow);
  margin-bottom: 1.5rem;
  letter-spacing: 0.08em;
}
.hero-eyebrow::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 2px;
  background: var(--yellow);
}
.hero h1 { color: var(--paper); margin-bottom: 1.5rem; }
.hero h1 em {
  font-style: normal;
  color: var(--cyan);
}
.hero-lead {
  font-family: var(--sans);
  font-size: 1.05rem;
  line-height: 1.7;
  color: rgba(250,250,250,0.75);
  max-width: 52ch;
  margin-bottom: 2.5rem;
}
.hero-stats {
  display: flex;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}
.hero-stat .num {
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--cyan);
  display: block;
}
.hero-stat .unit {
  font-family: var(--sans);
  font-size: 0.72rem;
  color: rgba(250,250,250,0.5);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.hero-image-wrap {
  position: relative;
  align-self: end;
}
.hero-image-wrap img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  display: block;
}
.hero-image-caption {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  font-family: var(--mono);
  font-size: 0.65rem;
  color: rgba(255,255,255,0.6);
  background: rgba(0,0,0,0.5);
  padding: 0.25rem 0.5rem;
  border-radius: 2px;
}

/* ============ COMPARISON TABLE ============ */
.compare-table-wrap { overflow-x: auto; }
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 0.875rem;
}
.compare-table th {
  background: var(--cyan);
  color: var(--paper);
  padding: 1rem 1.25rem;
  text-align: left;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.compare-table th:first-child { background: #004a62; }
.compare-table td {
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--border);
  color: var(--mid);
  vertical-align: top;
  line-height: 1.5;
}
.compare-table tr:last-child td { border-bottom: none; }
.compare-table td:first-child {
  font-family: var(--sans);
  font-weight: 600;
  color: var(--ink);
  background: var(--light);
  width: 22%;
}
.compare-table tr:hover td { background: #f0f6f9; }
.compare-table tr:hover td:first-child { background: #deeaf0; }
.mono-val { font-family: var(--mono); color: var(--cyan); }

/* ============ FLUID DYNAMICS SECTION ============ */
.fluid-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 4rem;
  align-items: center;
}
.fluid-content h2 { margin-bottom: 1.25rem; }
.fluid-content p {
  color: var(--mid);
  margin-bottom: 1rem;
  max-width: 60ch;
}
.fluid-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
}
.metric-card {
  background: var(--ink);
  color: var(--paper);
  padding: 1.25rem;
  border-radius: var(--r);
  border-left: 3px solid var(--cyan);
}
.metric-card .val {
  font-family: var(--mono);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--yellow);
  display: block;
  margin-bottom: 0.25rem;
}
.metric-card .desc {
  font-family: var(--sans);
  font-size: 0.72rem;
  color: rgba(250,250,250,0.6);
  line-height: 1.4;
}
.fluid-image img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border-radius: var(--r);
}

/* ============ QUIZ TEASER ============ */
.quiz-teaser {
  background: var(--magenta);
  color: var(--paper);
  padding: 4rem;
  border-radius: 8px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: center;
}
.quiz-teaser h2 { color: var(--paper); margin-bottom: 1rem; }
.quiz-teaser p {
  font-family: var(--sans);
  font-size: 1rem;
  color: rgba(250,250,250,0.85);
  max-width: 55ch;
}
.quiz-teaser-image img {
  width: 220px;
  height: 180px;
  object-fit: cover;
  border-radius: 4px;
  opacity: 0.85;
}
.btn-white { background: var(--paper); color: var(--magenta); margin-top: 1.5rem; }
.btn-white:hover { background: #f0f0f0; text-decoration: none; }

/* ============ PAPER FEED ============ */
.paperfeed-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.paperfeed-list { margin-top: 1.5rem; }
.paperfeed-item {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
}
.paperfeed-item:last-child { border-bottom: none; }
.pf-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--light);
  border-radius: 50%;
  color: var(--cyan);
}
.pf-icon svg { width: 18px; height: 18px; }
.pf-text h4 { font-size: 0.9rem; margin-bottom: 0.25rem; color: var(--ink); }
.pf-text p { font-family: var(--sans); font-size: 0.8rem; color: var(--mid); line-height: 1.5; }
.paperfeed-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--r);
}

/* ============ TIMELINE ============ */
.timeline { position: relative; padding: 2rem 0; overflow-x: auto; }
.timeline-track {
  display: flex;
  gap: 0;
  position: relative;
  min-width: 800px;
}
.timeline-track::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--border);
}
.timeline-item {
  flex: 1;
  position: relative;
  padding: 0 1rem;
  text-align: center;
}
.timeline-dot {
  width: 12px;
  height: 12px;
  background: var(--cyan);
  border-radius: 50%;
  margin: 22px auto 1.25rem;
  position: relative;
  z-index: 2;
  border: 3px solid var(--paper);
  outline: 2px solid var(--cyan);
}
.timeline-item.accent .timeline-dot { background: var(--magenta); outline-color: var(--magenta); }
.timeline-year {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--cyan);
  margin-bottom: 0.4rem;
}
.timeline-item.accent .timeline-year { color: var(--magenta); }
.timeline-title {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.35rem;
  line-height: 1.3;
}
.timeline-desc {
  font-family: var(--sans);
  font-size: 0.72rem;
  color: var(--mid);
  line-height: 1.45;
}
.timeline-image { margin-top: 2.5rem; }
.timeline-image img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--r);
}

/* ============ INK CHEMISTRY ============ */
.ink-grid {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 4rem;
  align-items: start;
}
.ink-image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  border-radius: var(--r);
  position: sticky;
  top: 5rem;
}
.ink-content h2 { margin-bottom: 1.5rem; }
.ink-content h3 {
  font-size: 1.1rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--cyan);
}
.ink-content p { color: var(--mid); margin-bottom: 1rem; max-width: 62ch; }
.chem-formula {
  font-family: var(--mono);
  font-size: 0.8rem;
  background: var(--light);
  border-left: 3px solid var(--yellow);
  padding: 0.75rem 1rem;
  border-radius: 0 var(--r) var(--r) 0;
  color: var(--ink);
  margin: 1rem 0;
}

/* ============ RESEARCH CARDS ============ */
.research-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.research-card {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}
.research-card:hover { transform: translateY(-4px); box-shadow: 0 8px 32px rgba(0,0,0,0.1); }
.research-card-img { position: relative; }
.research-card-img img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.research-card-body { padding: 1.5rem; }
.research-card-body .label { margin-bottom: 0.5rem; }
.research-card-body h3 { font-size: 1.05rem; margin-bottom: 0.75rem; }
.research-card-body p {
  font-family: var(--sans);
  font-size: 0.82rem;
  color: var(--mid);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  max-width: 55ch;
}
.research-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--mid);
}

/* ============ FAQ ACCORDION ============ */
.faq-list { max-width: 760px; }
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0;
  cursor: pointer;
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  gap: 1rem;
  user-select: none;
}
.faq-question:hover { color: var(--cyan); }
.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--light);
  border-radius: 50%;
  color: var(--cyan);
  font-size: 1rem;
  font-weight: 300;
  transition: transform 0.3s;
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--cyan); color: var(--paper); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
}
.faq-answer-inner {
  padding: 0 0 1.25rem;
  font-family: var(--sans);
  font-size: 0.875rem;
  color: var(--mid);
  line-height: 1.7;
  max-width: 65ch;
}
.faq-item.open .faq-answer { max-height: 400px; }

/* ============ FINAL CTA ============ */
.final-cta {
  background: var(--cyan);
  color: var(--paper);
  text-align: center;
  padding: 5rem 1.25rem;
}
.final-cta h2 { color: var(--paper); margin-bottom: 1rem; }
.final-cta p {
  font-family: var(--sans);
  color: rgba(250,250,250,0.8);
  max-width: 50ch;
  margin: 0 auto 2rem;
}
.btn-yellow { background: var(--yellow); color: var(--ink); }
.btn-yellow:hover { background: #e6b400; text-decoration: none; }

/* ============ BLOG HUB ============ */
.blog-hero {
  background: var(--ink);
  padding: 4rem 0 3rem;
  color: var(--paper);
}
.blog-hero h1 { color: var(--paper); margin-bottom: 1rem; }
.blog-hero-img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--r);
  margin-top: 2rem;
  opacity: 0.8;
}
.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}
.blog-card {
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper);
  transition: box-shadow 0.2s;
}
.blog-card:hover { box-shadow: 0 6px 24px rgba(0,0,0,0.08); }
.blog-card img { width: 100%; height: 220px; object-fit: cover; }
.blog-card-body { padding: 1.5rem; }
.blog-card-body .label { margin-bottom: 0.5rem; }
.blog-card-body h3 { font-size: 1.1rem; margin-bottom: 0.75rem; }
.blog-card-body p {
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--mid);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}
.blog-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--mid);
}

/* ============ ARTICLE PAGE ============ */
.article-hero {
  background: var(--ink);
  padding: 4rem 0 0;
  color: var(--paper);
}
.article-hero .label { margin-bottom: 0.75rem; }
.article-hero h1 {
  color: var(--paper);
  max-width: 20ch;
  margin-bottom: 1.5rem;
}
.article-meta {
  display: flex;
  gap: 2rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: rgba(250,250,250,0.5);
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}
.article-hero-img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  opacity: 0.8;
}
.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 4rem;
  padding: 4rem 0;
}
.article-body { max-width: 70ch; }
.article-body h2 {
  font-size: 1.5rem;
  margin: 2.5rem 0 1rem;
  color: var(--cyan);
}
.article-body h3 { font-size: 1.15rem; margin: 2rem 0 0.75rem; }
.article-body p { margin-bottom: 1.25rem; color: var(--mid); line-height: 1.75; }
.article-body ul, .article-body ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 0.5rem; color: var(--mid); font-family: var(--serif); line-height: 1.65; }
.article-body .callout {
  background: var(--light);
  border-left: 4px solid var(--cyan);
  padding: 1.25rem 1.5rem;
  border-radius: 0 4px 4px 0;
  margin: 2rem 0;
}
.article-body .callout p {
  font-family: var(--sans);
  font-size: 0.9rem;
  margin: 0;
  color: var(--ink);
}
.article-body .data-block {
  font-family: var(--mono);
  font-size: 0.8rem;
  background: #0d1117;
  color: #7dd3fc;
  padding: 1.25rem 1.5rem;
  border-radius: 6px;
  margin: 1.5rem 0;
  overflow-x: auto;
  line-height: 1.6;
}
.article-sidebar { padding-top: 1rem; }
.sidebar-widget {
  background: var(--light);
  border-radius: 6px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.sidebar-widget h5 {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.sidebar-link {
  display: block;
  font-family: var(--sans);
  font-size: 0.82rem;
  color: var(--mid);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
}
.sidebar-link:last-child { border-bottom: none; }
.sidebar-link:hover { color: var(--cyan); }
.sidebar-stat { margin-bottom: 0.75rem; }
.sidebar-stat .val { font-family: var(--mono); color: var(--cyan); font-size: 1.1rem; font-weight: 600; }
.sidebar-stat .lbl { font-family: var(--sans); font-size: 0.72rem; color: var(--mid); }

/* ============ QUIZ PAGE ============ */
.quiz-hero {
  background: var(--ink);
  padding: 4rem 0 3rem;
  color: var(--paper);
}
.quiz-hero h1 { color: var(--paper); margin-bottom: 1rem; }
.quiz-container { max-width: 740px; margin: 0 auto; padding: 3rem 0 5rem; }
.quiz-intro-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.quiz-intro-images img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--r);
}
.quiz-progress-wrap { margin-bottom: 2rem; }
.quiz-progress-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--mid);
  margin-bottom: 0.5rem;
}
.quiz-progress-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.quiz-progress-fill {
  height: 100%;
  background: var(--cyan);
  border-radius: 2px;
  transition: width 0.4s ease;
}
.quiz-card {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2.5rem;
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
}
.quiz-q-num {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--magenta);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.quiz-question {
  font-family: var(--sans);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 1.75rem;
  line-height: 1.4;
}
.quiz-options { display: flex; flex-direction: column; gap: 0.75rem; margin-bottom: 2rem; }
.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border: 2px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--paper);
}
.quiz-option:hover { border-color: var(--cyan); background: #f0f6fa; }
.quiz-option.selected { border-color: var(--cyan); background: #e8f4f9; }
.quiz-option.correct { border-color: #22c55e; background: #f0fdf4; }
.quiz-option.incorrect { border-color: var(--magenta); background: #fff0f7; }
.quiz-option-letter {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  background: var(--light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--mid);
}
.quiz-option.selected .quiz-option-letter { background: var(--cyan); color: var(--paper); }
.quiz-option.correct .quiz-option-letter { background: #22c55e; color: #fff; }
.quiz-option.incorrect .quiz-option-letter { background: var(--magenta); color: #fff; }
.quiz-option-text {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--ink);
  line-height: 1.4;
  padding-top: 0.15rem;
}
.quiz-feedback {
  display: none;
  padding: 1rem 1.25rem;
  border-radius: 6px;
  font-family: var(--sans);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}
.quiz-feedback.show { display: block; }
.quiz-feedback.correct { background: #f0fdf4; color: #166534; border-left: 4px solid #22c55e; }
.quiz-feedback.incorrect { background: #fff0f7; color: #7c0040; border-left: 4px solid var(--magenta); }
.quiz-nav { display: flex; justify-content: flex-end; gap: 0.75rem; }
.quiz-result { text-align: center; padding: 3rem 2rem; }
.quiz-score {
  font-family: var(--mono);
  font-size: 4rem;
  font-weight: 600;
  color: var(--cyan);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.quiz-result h2 { margin-bottom: 1rem; }
.quiz-result p { font-family: var(--sans); color: var(--mid); max-width: 45ch; margin: 0 auto 2rem; }

/* ============ ABOUT PAGE ============ */
.about-hero {
  background: var(--ink);
  padding: 5rem 0 4rem;
  color: var(--paper);
}
.about-hero h1 { color: var(--paper); margin-bottom: 1.25rem; }
.about-hero p {
  font-family: var(--sans);
  color: rgba(250,250,250,0.75);
  max-width: 60ch;
  font-size: 1.05rem;
  line-height: 1.7;
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.about-image img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  border-radius: var(--r);
}
.about-content h2 { margin-bottom: 1.25rem; }
.about-content p { color: var(--mid); margin-bottom: 1.25rem; max-width: 60ch; }
.values-list { margin-top: 2rem; }
.value-item {
  display: flex;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
}
.value-num {
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--cyan);
  line-height: 1;
  flex-shrink: 0;
  min-width: 2rem;
}
.value-text h4 { font-size: 0.9rem; margin-bottom: 0.25rem; }
.value-text p { font-family: var(--sans); font-size: 0.8rem; color: var(--mid); margin: 0; }

/* ============ CONTACT PAGE ============ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  padding: 5rem 0;
}
.contact-info h2 { margin-bottom: 1.5rem; }
.contact-info p { color: var(--mid); max-width: 50ch; margin-bottom: 1.5rem; }
.contact-detail {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  margin-bottom: 1rem;
  font-family: var(--sans);
  font-size: 0.875rem;
  color: var(--mid);
}
.contact-detail strong { display: block; color: var(--ink); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.2rem; }
.contact-form-wrap { padding: 2.5rem; background: var(--light); border-radius: 8px; }
.contact-form-wrap h3 { margin-bottom: 0.5rem; font-size: 1.25rem; }
.form-disclaimer {
  font-family: var(--sans);
  font-size: 0.75rem;
  color: var(--magenta);
  font-weight: 600;
  margin-bottom: 1.5rem;
  background: #fff0f7;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  border-left: 3px solid var(--magenta);
}
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block;
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.4rem;
  letter-spacing: 0.03em;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: var(--r);
  font-family: var(--sans);
  font-size: 0.875rem;
  color: var(--ink);
  background: var(--paper);
  transition: border-color 0.2s;
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--cyan); }
.form-group textarea { resize: vertical; min-height: 120px; }

/* ============ PARTNERSHIP PAGE ============ */
.partnership-hero {
  background: var(--ink);
  padding: 5rem 0 4rem;
  color: var(--paper);
}
.partnership-hero h1 { color: var(--paper); margin-bottom: 1rem; }
.partnership-hero p {
  font-family: var(--sans);
  color: rgba(250,250,250,0.75);
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.7;
}
.partnership-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.partner-image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  border-radius: var(--r);
}
.track-cards { display: grid; gap: 1.25rem; }
.track-card {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  border-left: 4px solid var(--cyan);
}
.track-card h4 { font-size: 1rem; margin-bottom: 0.5rem; color: var(--cyan); }
.track-card p { font-family: var(--sans); font-size: 0.825rem; color: var(--mid); line-height: 1.55; margin: 0; }

/* ============ POLICY PAGES ============ */
.policy-hero {
  background: var(--ink);
  padding: 4rem 0 3rem;
  color: var(--paper);
}
.policy-hero h1 { color: var(--paper); margin-bottom: 0.75rem; }
.policy-hero p {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: rgba(250,250,250,0.5);
}
.policy-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 4rem 1.25rem 6rem;
}
.policy-body h2 {
  font-size: 1.25rem;
  margin: 2.5rem 0 0.75rem;
  color: var(--cyan);
}
.policy-body h3 { font-size: 1rem; margin: 1.75rem 0 0.5rem; }
.policy-body p { color: var(--mid); margin-bottom: 1rem; font-family: var(--sans); font-size: 0.9rem; line-height: 1.75; }
.policy-body ul { padding-left: 1.5rem; margin-bottom: 1rem; list-style: disc; }
.policy-body li { color: var(--mid); font-family: var(--sans); font-size: 0.9rem; line-height: 1.65; margin-bottom: 0.4rem; }
.policy-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 0.825rem;
  margin: 1.5rem 0;
}
.policy-table th {
  background: var(--light);
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink);
  border-bottom: 2px solid var(--border);
}
.policy-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--mid);
  vertical-align: top;
}
.policy-table tr:last-child td { border-bottom: none; }
.policy-intro {
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--mid);
  border-left: 4px solid var(--yellow);
  padding: 1rem 1.5rem;
  background: var(--light);
  border-radius: 0 4px 4px 0;
  margin-bottom: 2rem;
  line-height: 1.7;
}

/* ============ THANK YOU PAGE ============ */
.thankyou-section {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1.25rem;
}
.thankyou-icon {
  width: 80px;
  height: 80px;
  background: var(--light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 2rem;
  color: var(--cyan);
}
.thankyou-icon svg { width: 36px; height: 36px; }
.thankyou-section h1 { font-size: 2rem; margin-bottom: 1rem; }
.thankyou-section p { font-family: var(--sans); color: var(--mid); max-width: 45ch; margin: 0 auto 2rem; }

/* ============ BREADCRUMB ============ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--sans);
  font-size: 0.75rem;
  color: rgba(250,250,250,0.5);
  padding: 1rem 0;
  flex-wrap: wrap;
}
.breadcrumb a { color: rgba(250,250,250,0.6); text-decoration: none; }
.breadcrumb a:hover { color: var(--paper); }
.breadcrumb span { color: rgba(250,250,250,0.35); }

/* ============ TAG ============ */
.tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.68rem;
  padding: 0.2rem 0.6rem;
  border-radius: 2rem;
  background: var(--light);
  color: var(--mid);
  font-weight: 500;
}
.tag-cyan { background: rgba(0,94,122,0.12); color: var(--cyan); }
.tag-magenta { background: rgba(158,0,89,0.1); color: var(--magenta); }

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: none; }
  .ink-grid { grid-template-columns: 1fr; }
  .ink-image { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
}

@media (max-width: 768px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.4rem; }
  .section { padding: 3.5rem 0; }
  .nav-desktop { display: none; }
  .hamburger { display: flex; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-image-wrap { display: none; }
  .hero-content { padding-bottom: 3rem; }
  .fluid-grid { grid-template-columns: 1fr; }
  .fluid-image { display: none; }
  .quiz-teaser { grid-template-columns: 1fr; }
  .quiz-teaser-image { display: none; }
  .paperfeed-grid { grid-template-columns: 1fr; }
  .paperfeed-image { order: -1; }
  .paperfeed-image img { height: 240px; }
  .research-grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .about-image { display: none; }
  .contact-grid { grid-template-columns: 1fr; padding: 3rem 0; }
  .partnership-grid { grid-template-columns: 1fr; }
  .partner-image { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .quiz-card { padding: 1.5rem; }
  .quiz-intro-images { grid-template-columns: 1fr; }
  .fluid-metrics { grid-template-columns: 1fr; }
  .hero-stats { gap: 1.5rem; }
  .timeline-track { min-width: 600px; }
}

@media (max-width: 480px) {
  .btn { font-size: 0.8rem; padding: 0.65rem 1.25rem; }
  .quiz-teaser { padding: 2rem; }
  .cookie-actions { width: 100%; }
  .article-hero h1 { font-size: 1.5rem; }
}