@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Manrope:wght@600;700;800&display=swap');

:root {
  --navy: #07151f;
  --ink: #10232e;
  --muted: #60727c;
  --teal: #00b1b8;
  --teal-hover: #009399;
  --blue: #4f8df5;
  --line: #dce6eb;
  --light: #f4f9fb;
  --white: #ffffff;
  --max: 1160px;
  --radius: 6px;
  --shadow-sm: 0 2px 8px rgba(7, 21, 31, 0.04);
  --shadow-md: 0 8px 24px rgba(7, 21, 31, 0.08);
  --shadow-lg: 0 18px 45px rgba(14, 26, 34, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font: 16px/1.65 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.15;
  color: var(--navy);
  margin-top: 0;
}

h1 {
  font-size: clamp(40px, 5.5vw, 72px);
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(30px, 3.8vw, 48px);
  letter-spacing: -0.03em;
}

h3 {
  font-size: 22px;
  letter-spacing: -0.02em;
}

p {
  margin-top: 0;
  margin-bottom: 1.25em;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--teal);
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  color: var(--teal-hover);
}

.wrap {
  width: min(var(--max), calc(100% - 48px));
  margin-left: auto;
  margin-right: auto;
}

/* Header & Nav */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav {
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--navy);
  font-family: 'Manrope', sans-serif;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.02em;
}

.brand span {
  color: var(--teal);
}

.brand img {
  width: 32px;
  height: 32px;
}

.nav nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  position: relative;
  transition: color 0.2s ease;
}

.nav nav a:hover {
  color: var(--teal);
}

.nav nav a.active {
  color: var(--teal);
}

.cta {
  background: var(--navy);
  color: #ffffff !important;
  padding: 10px 18px;
  border-radius: var(--radius);
  transition: background 0.2s ease, transform 0.15s ease !important;
}

.cta:hover {
  background: #143245;
  transform: translateY(-1px);
}

.menu {
  display: none;
  border: 0;
  background: none;
  font-size: 26px;
  cursor: pointer;
  color: var(--navy);
  padding: 6px;
}

/* Hero */
.hero, .pagehero {
  background: var(--navy);
  color: #ffffff;
  position: relative;
}

.hero {
  padding: 100px 0 95px;
  overflow: hidden;
}

.hero h1, .pagehero h1 {
  color: #ffffff;
}

.glow {
  position: absolute;
  width: 650px;
  height: 650px;
  border-radius: 50%;
  right: -150px;
  top: -150px;
  background: radial-gradient(circle, rgba(0, 177, 184, 0.22), transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 70px;
  align-items: center;
  position: relative;
}

.eyebrow {
  font-size: 11px;
  letter-spacing: 0.18em;
  font-weight: 800;
  color: var(--teal);
  margin: 0 0 16px;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 20px;
}

.hero h1 em {
  font-style: normal;
  color: #83e3e5;
}

.hero-copy {
  font-size: 19px;
  line-height: 1.6;
  color: #c3d1d8;
  max-width: 640px;
}

.actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: var(--radius);
  padding: 13px 22px;
  text-decoration: none;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn.primary {
  background: var(--teal);
  color: var(--navy);
}

.btn.primary:hover {
  background: #39cdd3;
  color: var(--navy);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0, 177, 184, 0.3);
}

.btn.ghost {
  border: 1px solid #49606d;
  color: #ffffff;
  background: transparent;
}

.btn.ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: #83e3e5;
  color: #83e3e5;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

.trust {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 48px;
  color: #9db0b9;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.trust span {
  display: inline-flex;
  align-items: center;
}

.trust span:not(:last-child)::after {
  content: "•";
  margin-left: 20px;
  color: #274757;
}

.hero-card {
  background: linear-gradient(145deg, #102b39, #091c27);
  border: 1px solid #244452;
  padding: 38px;
  border-radius: 12px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

.hero-card h2 {
  color: #ffffff;
  font-size: 26px;
  margin-bottom: 14px;
}

.hero-card p:not(.eyebrow) {
  color: #afc0c8;
  font-size: 15px;
}

.lentivirus-structure {
  display: block;
  width: 240px;
  max-width: 100%;
  height: auto;
  margin: 0 auto 28px;
}

.metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  border-top: 1px solid #284451;
  padding-top: 24px;
  margin-top: 24px;
}

.metrics b {
  display: block;
  font-family: 'Manrope', sans-serif;
  font-size: 22px;
  color: #ffffff;
}

.metrics small {
  color: #8da2ad;
  font-size: 13px;
  font-weight: 500;
}

/* Strip */
.strip {
  background: #edf5f7;
  border-bottom: 1px solid var(--line);
}

.strip .wrap {
  min-height: 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: #60747e;
  padding: 12px 0;
}

/* Sections */
.section {
  padding: 95px 0;
}

.alt {
  background: var(--light);
}

.two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.lead {
  font-size: 21px;
  line-height: 1.55;
  color: #243b47;
  margin-bottom: 20px;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  min-height: 310px;
  text-decoration: none;
  color: var(--ink);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: #b8d4df;
}

.card > b, .service-list article > b, .expert > b, .values b {
  color: var(--teal);
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  font-size: 13px;
  display: block;
  margin-bottom: 14px;
}

.card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.card p, .expert p, .values p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.card i {
  margin-top: auto;
  align-self: flex-end;
  color: var(--teal);
  font-size: 22px;
  font-style: normal;
  transition: transform 0.2s ease;
}

.card:hover i {
  transform: translateX(4px);
}

/* Callout */
.callout {
  background: var(--navy);
  color: #ffffff;
  padding: 55px 60px;
  border-radius: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
}

.callout h2 {
  color: #ffffff;
  margin-bottom: 10px;
}

.callout p {
  color: #b0c2cb;
  margin-bottom: 0;
  font-size: 16px;
}

/* Page Hero */
.pagehero {
  padding: 85px 0 75px;
}

.pagehero h1 {
  max-width: 900px;
  margin: 0 0 16px;
}

.pagehero > div > p:last-child {
  max-width: 720px;
  color: #b9c9d0;
  font-size: 19px;
  line-height: 1.6;
}

/* Service List */
.service-list article {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 40px;
  padding: 65px 0;
  border-bottom: 1px solid var(--line);
}

.service-list article:first-child {
  padding-top: 0;
}

.service-list article:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.service-list h2 {
  font-size: 34px;
  margin-bottom: 14px;
}

.service-list ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 30px;
  color: var(--muted);
  font-size: 15px;
  margin-top: 24px;
}

.service-list li {
  position: relative;
  padding-left: 20px;
}

.service-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--teal);
  font-weight: bold;
}

/* Expert Grid */
.expertgrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.expert {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  min-height: 270px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.expert:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.expert h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.expert span {
  display: inline-block;
  margin-top: auto;
  padding-top: 18px;
  font-size: 11px;
  font-weight: 700;
  color: #526873;
  letter-spacing: 0.05em;
}

/* Values Grid */
.values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.values > div {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 28px;
}

.values h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

/* Contact Page */
.contact {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 80px;
  align-items: start;
}

.email {
  display: inline-block;
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  font-size: 24px;
  color: var(--teal);
  text-decoration: none;
  margin-bottom: 6px;
}

.email:hover {
  text-decoration: underline;
}

.note {
  font-size: 13px;
  color: var(--muted);
  margin-top: 4px;
}

.contact-details {
  margin-top: 36px;
  border-top: 1px solid var(--line);
  padding-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item b {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
}

.contact-item span {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.5;
}

/* Forms */
form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  background: #ffffff;
  padding: 36px;
  border-radius: 8px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

label {
  font-size: 13px;
  font-weight: 700;
  color: #364e5c;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

input, textarea, select {
  font: inherit;
  border: 1px solid #c9d8df;
  border-radius: 4px;
  padding: 12px 14px;
  color: var(--ink);
  background: #ffffff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(0, 177, 184, 0.18);
}

.form-select {
  cursor: pointer;
}

textarea {
  resize: vertical;
  min-height: 130px;
}

.form-feedback {
  font-size: 14px;
  padding: 10px 14px;
  border-radius: 4px;
  display: none;
}

.form-feedback.success {
  display: block;
  background: #e6f7f8;
  color: #075b5f;
  border: 1px solid #b3e6e8;
}

.form-feedback.error {
  display: block;
  background: #fdf0f0;
  color: #9c2828;
  border: 1px solid #f8c8c8;
}

/* Footer */
footer {
  background: #06141d;
  color: #9db0b9;
  padding: 70px 0 30px;
}

.foot {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 50px;
}

.foot > div:not(:first-child) {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.foot b {
  color: #ffffff;
  font-size: 13px;
  font-family: 'Manrope', sans-serif;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.foot a:not(.brand) {
  color: #9db0b9;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s ease;
}

.foot a:not(.brand):hover {
  color: var(--teal);
}

.foot .brand {
  color: #ffffff;
  margin-bottom: 12px;
}

.foot p {
  font-size: 14px;
  max-width: 340px;
  color: #7d939f;
}

.copyright {
  border-top: 1px solid #162a34;
  margin-top: 45px;
  padding-top: 24px;
  font-size: 12px;
  color: #5c727e;
}

/* Responsive */
@media (max-width: 960px) {
  .hero-grid, .two, .contact {
    grid-template-columns: 1fr;
    gap: 45px;
  }
  .cards {
    grid-template-columns: 1fr 1fr;
  }
  .expertgrid {
    grid-template-columns: 1fr 1fr;
  }
  .nav nav {
    display: none;
  }
  .menu {
    display: block;
  }
  .nav.open nav {
    display: flex;
    position: absolute;
    top: 78px;
    left: 0;
    right: 0;
    background: #ffffff;
    padding: 24px 28px;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--line);
  }
  .strip .wrap {
    padding: 14px 0;
  }
}

@media (max-width: 640px) {
  .wrap {
    width: calc(100% - 32px);
  }
  .section {
    padding: 70px 0;
  }
  .hero {
    padding: 70px 0;
  }
  .hero h1 {
    font-size: 42px;
  }
  .cards, .expertgrid, .values {
    grid-template-columns: 1fr;
  }
  .service-list article {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .service-list ul {
    grid-template-columns: 1fr;
  }
  .callout {
    padding: 35px 25px;
    flex-direction: column;
    align-items: flex-start;
  }
  .foot {
    grid-template-columns: 1fr 1fr;
  }
  form {
    padding: 24px 18px;
  }
}

/* ==========================================================================
   Blog & Article Styles
   ========================================================================== */

/* Blog Filter Bar */
.blog-filters {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-btn {
  background: #ffffff;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 30px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.filter-btn.active {
  background: var(--navy);
  border-color: var(--navy);
  color: #ffffff;
}

/* Featured Article Banner */
.featured-article {
  background: linear-gradient(135deg, #091b26 0%, #102d3d 100%);
  border: 1px solid #1f4255;
  border-radius: 12px;
  padding: 48px;
  margin-bottom: 50px;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.featured-article::after {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 177, 184, 0.2) 0%, transparent 70%);
  pointer-events: none;
}

.featured-content {
  position: relative;
  z-index: 2;
}

.featured-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--teal);
  background: rgba(0, 177, 184, 0.12);
  border: 1px solid rgba(0, 177, 184, 0.3);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 18px;
}

.featured-article h2 {
  color: #ffffff;
  font-size: clamp(24px, 2.5vw, 34px);
  margin-bottom: 16px;
  line-height: 1.25;
}

.featured-article h2 a {
  color: #ffffff;
  text-decoration: none;
  transition: color 0.2s ease;
}

.featured-article h2 a:hover {
  color: #83e3e5;
}

.featured-article p {
  color: #c1d3dc;
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 24px;
}

.featured-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  color: #8da4b0;
  font-size: 13px;
  font-weight: 500;
}

.featured-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.featured-graphic {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  padding: 30px;
  position: relative;
  z-index: 2;
}

.metric-comparison-box {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.metric-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.metric-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.metric-label {
  font-size: 13px;
  color: #b7cbdb;
  font-weight: 500;
}

.metric-value {
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  font-size: 14px;
  color: #ffffff;
}

.metric-value.teal {
  color: var(--teal);
}

/* Blog Grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.blog-card {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

.blog-card:hover {
  transform: translateY(-3px);
  border-color: #b1d4dc;
  box-shadow: var(--shadow-md);
}

.blog-card-category {
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--teal);
  margin-bottom: 12px;
  display: block;
}

.blog-card h3 {
  font-size: 19px;
  color: var(--navy);
  margin-bottom: 12px;
  line-height: 1.35;
  transition: color 0.2s ease;
}

.blog-card:hover h3 {
  color: var(--teal-hover);
}

.blog-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

.blog-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--line);
  padding-top: 16px;
  margin-top: auto;
  font-size: 13px;
  color: #8298a5;
}

.blog-read-more {
  color: var(--navy);
  font-weight: 700;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s ease, gap 0.2s ease;
}

.blog-card:hover .blog-read-more {
  color: var(--teal);
  gap: 10px;
}

/* Article Hero */
.article-header {
  background: var(--navy);
  color: #ffffff;
  padding: 80px 0 70px;
  position: relative;
  border-bottom: 1px solid #1a3240;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #8da4b0;
  margin-bottom: 24px;
}

.breadcrumbs a {
  color: #8da4b0;
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: #83e3e5;
}

.breadcrumbs span.current {
  color: var(--teal);
}

.article-header h1 {
  font-size: clamp(32px, 4.2vw, 54px);
  max-width: 900px;
  margin-bottom: 20px;
  line-height: 1.2;
}

.article-subtitle {
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.55;
  color: #bcd0dc;
  max-width: 820px;
  margin-bottom: 32px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid #1a3443;
}

.author-chip {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: radial-gradient(circle, #83e3e5, #009399);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--navy);
  font-weight: 800;
  font-size: 15px;
  font-family: 'Manrope', sans-serif;
  border: 2px solid #ffffff;
}

.author-chip-text b {
  display: block;
  font-size: 14px;
  color: #ffffff;
}

.author-chip-text small {
  color: #8da4b0;
  font-size: 12px;
}

.article-details {
  display: flex;
  gap: 20px;
  font-size: 13px;
  color: #8da4b0;
}

/* Article Layout: Two-Column with Sticky Sidebar */
.article-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 60px;
  align-items: start;
}

.article-toc-wrapper {
  position: sticky;
  top: 104px;
  background: var(--light);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
}

.toc-title {
  font-family: 'Manrope', sans-serif;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--navy);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-list li a {
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.4;
  display: block;
  padding: 4px 0 4px 10px;
  border-left: 2px solid transparent;
  transition: all 0.2s ease;
}

.toc-list li a:hover,
.toc-list li a.active {
  color: var(--teal);
  border-left-color: var(--teal);
  padding-left: 14px;
}

.toc-cta {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.toc-cta p {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 12px;
}

.toc-cta a {
  display: block;
  text-align: center;
  font-size: 13px;
  padding: 8px 12px;
}

/* Article Body Prose */
.article-body {
  font-size: 17px;
  line-height: 1.75;
  color: #192a34;
  max-width: 760px;
}

.article-body h2 {
  font-size: 28px;
  margin-top: 48px;
  margin-bottom: 18px;
  color: var(--navy);
  scroll-margin-top: 100px;
}

.article-body h3 {
  font-size: 21px;
  margin-top: 36px;
  margin-bottom: 14px;
  color: var(--navy);
  scroll-margin-top: 100px;
}

.article-body p {
  margin-bottom: 24px;
}

.article-body ul, .article-body ol {
  margin: 0 0 28px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 10px;
}

.article-body strong {
  color: var(--navy);
}

/* Callout Boxes */
.callout-box {
  background: var(--light);
  border-left: 4px solid var(--teal);
  border-radius: 0 8px 8px 0;
  padding: 24px 28px;
  margin: 36px 0;
}

.callout-box h4 {
  font-size: 16px;
  color: var(--navy);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.callout-box p {
  margin-bottom: 0;
  font-size: 15px;
  color: #27404d;
}

.warning-box {
  background: #fff8f4;
  border-left: 4px solid #f27c38;
  border-radius: 0 8px 8px 0;
  padding: 24px 28px;
  margin: 36px 0;
}

.warning-box h4 {
  font-size: 16px;
  color: #a8460f;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.warning-box p {
  margin-bottom: 0;
  font-size: 15px;
  color: #63331b;
}

/* Scientific Comparison Table */
.data-table-wrapper {
  overflow-x: auto;
  margin: 36px 0;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  text-align: left;
}

.data-table th {
  background: #f4f8fa;
  color: var(--navy);
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  padding: 14px 18px;
  border-bottom: 2px solid var(--line);
}

.data-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  color: #2a3c46;
  vertical-align: top;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background: #f9fcfd;
}

.data-table .highlight-col {
  background: rgba(0, 177, 184, 0.05);
  font-weight: 600;
}

/* Metric Ratio Formula Box */
.formula-card {
  background: #0b1f2b;
  color: #ffffff;
  border-radius: 8px;
  padding: 28px 32px;
  margin: 36px 0;
  border: 1px solid #1a384b;
}

.formula-card h4 {
  color: var(--teal);
  font-size: 14px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.formula-display {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 16px;
  background: rgba(0, 0, 0, 0.25);
  padding: 16px 20px;
  border-radius: 6px;
  border-left: 3px solid var(--teal);
  margin-bottom: 14px;
  color: #9fecef;
  overflow-x: auto;
}

.formula-card p {
  color: #afc4d1;
  font-size: 14px;
  margin-bottom: 0;
}

/* Author Box at Bottom */
.author-bio-card {
  display: flex;
  gap: 24px;
  background: var(--light);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 32px;
  margin: 50px 0 40px;
}

.author-bio-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: radial-gradient(circle, #83e3e5, #009399);
  display: grid;
  place-items: center;
  color: var(--navy);
  font-family: 'Manrope', sans-serif;
  font-weight: 800;
  font-size: 24px;
  flex-shrink: 0;
}

.author-bio-info h3 {
  font-size: 19px;
  margin-bottom: 4px;
}

.author-bio-info .author-title {
  display: block;
  font-size: 13px;
  color: var(--teal);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.author-bio-info p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 0;
}

/* Blog Article Footer CTA */
.article-cta {
  background: linear-gradient(135deg, #091b26 0%, #102d3d 100%);
  border-radius: 10px;
  padding: 40px;
  color: #ffffff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
  margin: 40px 0;
}

.article-cta h3 {
  color: #ffffff;
  font-size: 22px;
  margin-bottom: 8px;
}

.article-cta p {
  color: #bad0dc;
  font-size: 15px;
  margin-bottom: 0;
  max-width: 520px;
}

/* Share & Navigation Strip */
.article-nav-strip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
  font-size: 14px;
}

.article-nav-strip a {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.assessment-resource {
  border-bottom: 1px solid var(--line);
  background: #f1f6f8;
}

.assessment-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.75fr);
  align-items: center;
  gap: 90px;
}

.assessment-grid h1 {
  font-size: clamp(36px, 4.6vw, 58px);
  letter-spacing: -0.035em;
  margin-bottom: 24px;
}

.assessment-subtitle {
  color: #007d83;
  font-family: 'Manrope', sans-serif;
  font-size: 21px;
  font-weight: 700;
  line-height: 1.45;
}

.assessment-text-link {
  color: var(--navy);
  font-size: 14px;
  font-weight: 700;
  text-underline-offset: 5px;
}

.assessment-text-link:hover {
  color: #007d83;
}

.assessment-meta {
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
}

.assessment-disclaimer {
  color: var(--muted);
  font-size: 12px;
  max-width: 530px;
}

.assessment-preview {
  display: block;
  max-width: 330px;
  width: 100%;
  margin-inline: auto;
  color: var(--navy);
  text-decoration: none;
}

.assessment-preview img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid #d4e0e6;
  box-shadow: 12px 16px 0 #e0eaef, 0 18px 36px rgba(14, 26, 34, 0.08);
  transition: transform 0.2s ease;
}

.assessment-preview:hover img {
  transform: translateY(-3px);
}

.assessment-preview > span {
  display: flex;
  justify-content: space-between;
  margin-top: 30px;
  font-size: 10px;
  letter-spacing: 0.07em;
  font-weight: 700;
}

.assessment-inside {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 90px;
}

.assessment-contents {
  list-style: none;
  padding: 0;
  margin: 0;
}

.assessment-contents li {
  display: grid;
  grid-template-columns: 55px minmax(0, 1fr);
  gap: 22px;
  border-top: 1px solid var(--line);
  padding: 22px 0;
}

.assessment-contents li > span {
  color: #007d83;
  font-size: 12px;
  font-weight: 700;
  padding-top: 4px;
}

.assessment-contents h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.assessment-contents p {
  font-size: 14px;
  margin: 0;
}

.assessment-use {
  max-width: 800px;
}

.assessment-strip {
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  padding: 32px;
  margin-bottom: 48px;
  background: var(--light);
}

.assessment-strip h2 {
  font-size: 25px;
  margin-bottom: 10px;
}

.assessment-strip p {
  font-size: 14px;
  margin-bottom: 0;
}

.assessment-strip .eyebrow {
  font-size: 11px;
  margin-bottom: 12px;
}

.assessment-strip .btn {
  flex-shrink: 0;
}

.assessment-preview:focus-visible,
.assessment-text-link:focus-visible {
  outline: 3px solid #007d83;
  outline-offset: 6px;
}

@media (max-width: 960px) {
  .assessment-grid,
  .assessment-inside {
    gap: 40px;
  }

  .assessment-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  }

  .assessment-strip {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }
}

@media (max-width: 640px) {
  .assessment-grid,
  .assessment-inside {
    grid-template-columns: minmax(0, 1fr);
  }

  .assessment-grid .assessment-preview {
    max-width: 260px;
    margin-top: 12px;
  }

  .assessment-contents li {
    gap: 12px;
  }

  .assessment-strip {
    padding: 24px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .assessment-preview img {
    transition: none;
  }
}

/* Responsive adjustments for Blog */
@media (max-width: 960px) {
  .featured-article {
    grid-template-columns: 1fr;
    padding: 32px;
  }
  .blog-grid {
    grid-template-columns: 1fr 1fr;
  }
  .article-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .article-toc-wrapper {
    position: static;
  }
  .article-cta {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .featured-article {
    padding: 24px 20px;
  }
  .author-bio-card {
    flex-direction: column;
    align-items: flex-start;
  }
  .article-meta-bar {
    gap: 16px;
  }
}