/* ==========================================================================
   SCIENTIFIC RESEARCH COLLABORATION LANDING PAGE DESIGN SYSTEM
   Palette:
     Deep Navy: #10263D | Scientific Teal: #087E8B | Royal Blue: #2563A6
     White: #FFFFFF    | Light Background: #F4F8FB | Body Text: #334155
     Subtle Border: #DAE5EE
   Typography:
     Headings: Manrope (or Plus Jakarta Sans)
     Body: Inter
     Metadata/Code: IBM Plex Mono
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Inter:wght@300;400;500;600;700&family=Manrope:wght@500;600;700;800&display=swap');

:root {
  --navy: #10263D;
  --navy-dark: #0A192A;
  --navy-light: #1A3654;
  --teal: #087E8B;
  --teal-hover: #066772;
  --teal-light: #EBF7F8;
  --teal-border: #BEE3E7;
  --royal-blue: #2563A6;
  --royal-blue-light: #EEF4FB;
  --white: #FFFFFF;
  --light-bg: #F4F8FB;
  --card-bg: #FFFFFF;
  --body-text: #334155;
  --text-muted: #64748B;
  --text-heading: #10263D;
  --subtle-border: #DAE5EE;
  --border-focus: #087E8B;
  --success: #0E7C52;
  --success-light: #E6F4EA;
  --whatsapp: #25D366;
  --whatsapp-dark: #1EBE5D;

  --font-heading: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(16, 38, 61, 0.04);
  --shadow-card: 0 4px 16px rgba(16, 38, 61, 0.05);
  --shadow-hover: 0 10px 28px rgba(16, 38, 61, 0.09);
  --shadow-float: 0 12px 36px rgba(16, 38, 61, 0.15);

  --transition-fast: 0.18s ease;
  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

/* Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 86px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--body-text);
  background-color: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: transparent;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding-top: 84px;
  padding-bottom: 84px;
  position: relative;
}

.section--light {
  background-color: var(--light-bg);
  border-top: 1px solid var(--subtle-border);
  border-bottom: 1px solid var(--subtle-border);
}

.section--white {
  background-color: var(--white);
}

.section--navy {
  background-color: var(--navy);
  color: var(--white);
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-heading);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

.section--navy h1,
.section--navy h2,
.section--navy h3,
.section--navy h4 {
  color: var(--white);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--teal);
  margin-bottom: 12px;
}

.eyebrow::before {
  content: '';
  display: inline-block;
  width: 18px;
  height: 2px;
  background-color: var(--teal);
}

.eyebrow--light {
  color: #5CE1E6;
}
.eyebrow--light::before {
  background-color: #5CE1E6;
}

.section-header {
  max-width: 760px;
  margin-bottom: 52px;
}

.section-header.text-center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-header.text-center .eyebrow {
  justify-content: center;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 14px;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.5rem;
  }
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.section--navy .section-subtitle {
  color: #BAC7D5;
}

/* Scientific Metadata Badge */
.sci-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background-color: var(--teal-light);
  color: var(--teal);
  border: 1px solid var(--teal-border);
}

.sci-tag--navy {
  background-color: rgba(16, 38, 61, 0.06);
  color: var(--navy);
  border-color: var(--subtle-border);
}

.sci-tag--verified {
  background-color: var(--success-light);
  color: var(--success);
  border-color: rgba(14, 124, 82, 0.25);
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

.btn-primary {
  background-color: var(--teal);
  color: var(--white);
  border: 1px solid var(--teal);
  box-shadow: 0 2px 8px rgba(8, 126, 139, 0.25);
}

.btn-primary:hover {
  background-color: var(--teal-hover);
  border-color: var(--teal-hover);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(8, 126, 139, 0.35);
}

.btn-secondary {
  background-color: var(--white);
  color: var(--navy);
  border: 1px solid var(--subtle-border);
}

.btn-secondary:hover {
  background-color: var(--light-bg);
  border-color: #BAC7D5;
  color: var(--teal);
  transform: translateY(-1px);
}

.btn-whatsapp {
  background-color: #128C7E;
  color: var(--white);
  border: 1px solid #128C7E;
}

.btn-whatsapp:hover {
  background-color: #075E54;
  border-color: #075E54;
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(18, 140, 126, 0.3);
}

.btn-outline-white {
  background-color: transparent;
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-outline-white:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--white);
  color: var(--white);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 15px 28px;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   HEADER / STICKY NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--subtle-border);
  transition: all var(--transition);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo img {
  height: 38px;
  width: auto;
  object-fit: contain;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--navy);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

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

.brand-subtitle {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.nav-desktop {
  display: none;
}

@media (min-width: 992px) {
  .nav-desktop {
    display: flex;
    align-items: center;
    gap: 32px;
  }
}

.nav-link {
  font-family: var(--font-body);
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #222222;
  padding: 8px 0;
  position: relative;
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  text-decoration: none;
}

.nav-link:hover,
.nav-link.active {
  color: var(--teal);
}

.nav-arrow-icon {
  width: 11px;
  height: 11px;
  stroke: currentColor;
  stroke-width: 2.2;
  transition: transform var(--transition-fast);
  margin-left: 1px;
}

/* Services Dropdown */
.nav-item-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  min-width: 290px;
  background-color: var(--white);
  border: 1px solid var(--subtle-border);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(16, 38, 61, 0.12);
  padding: 10px 8px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: 1050;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

/* Hover & Focus state */
.nav-item-dropdown:hover .nav-dropdown-menu,
.nav-item-dropdown:focus-within .nav-dropdown-menu,
.nav-item-dropdown.is-open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-item-dropdown:hover .nav-arrow-icon,
.nav-item-dropdown:focus-within .nav-arrow-icon {
  transform: translate(2px, -2px);
  color: var(--teal);
}

.dropdown-link {
  padding: 10px 14px;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--navy);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-decoration: none;
  text-transform: none;
}

.dropdown-link:hover {
  background-color: var(--light-bg);
  color: var(--teal);
  padding-left: 18px;
}

.dropdown-link-featured {
  background-color: var(--teal-light);
  color: var(--teal);
  font-weight: 600;
  border: 1px solid var(--teal-border);
  margin-top: 4px;
}

.dropdown-link-featured:hover {
  background-color: #D8F0F3;
  color: var(--teal-hover);
}

.dropdown-featured-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 6px;
  background-color: var(--teal);
  color: var(--white);
  border-radius: 4px;
  margin-right: 8px;
}

/* Right Group: Social icons + CTA */
.header-right-group {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-social-list {
  list-style: none;
  display: none;
  align-items: center;
  gap: 12px;
  margin: 0;
  padding: 0;
}

@media (min-width: 992px) {
  .header-social-list {
    display: flex;
  }
}

.social-icon-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  color: #1A202C;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.social-icon-link:hover {
  color: var(--teal);
  background-color: var(--light-bg);
  transform: translateY(-2px);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-header-cta {
  display: none;
}

@media (min-width: 1200px) {
  .btn-header-cta {
    display: inline-flex;
  }
}

.hamburger-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background-color: var(--light-bg);
  border: 1px solid var(--subtle-border);
}

@media (min-width: 992px) {
  .hamburger-btn {
    display: none;
  }
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--navy);
  transition: all var(--transition-fast);
}

.hamburger-btn.is-active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger-btn.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.is-active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: 74px;
  left: 0;
  width: 100%;
  height: calc(100vh - 74px);
  background-color: var(--white);
  border-top: 1px solid var(--subtle-border);
  padding: 24px;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
  z-index: 999;
}

.mobile-drawer.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-dropdown-parent {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mobile-sub-list {
  list-style: none;
  padding-left: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-left: 2px solid var(--subtle-border);
  margin-left: 4px;
  margin-bottom: 8px;
}

.mobile-sub-link {
  font-size: 0.92rem;
  color: var(--body-text);
  padding: 6px 0;
  display: block;
  text-decoration: none;
}

.mobile-sub-link:hover {
  color: var(--teal);
}

.mobile-social-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding-bottom: 8px;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-nav-link {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--navy);
  display: block;
  padding: 10px 0;
  border-bottom: 1px solid var(--subtle-border);
}

.mobile-drawer-footer {
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ==========================================================================
   SECTION 1 — HERO
   ========================================================================== */
.hero-section {
  padding-top: 56px;
  padding-bottom: 72px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F9FBFC 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
  }
}

.hero-content {
  display: flex;
  flex-direction: column;
}

.hero-h1 {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--navy);
  margin-bottom: 14px;
}

@media (min-width: 768px) {
  .hero-h1 {
    font-size: 3rem;
  }
}

.hero-supporting-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--royal-blue);
  margin-bottom: 16px;
  line-height: 1.35;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--body-text);
  line-height: 1.65;
  margin-bottom: 30px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 34px;
}

.hero-credibility {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--subtle-border);
}

@media (max-width: 580px) {
  .hero-credibility {
    grid-template-columns: 1fr;
    gap: 10px;
  }
}

.cred-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.cred-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  color: var(--teal);
  margin-top: 2px;
}

.cred-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
  line-height: 1.3;
}

.cred-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--text-muted);
}

/* Hero Visual Card */
.hero-visual-wrapper {
  position: relative;
}

.hero-visual-card {
  position: relative;
  background-color: var(--navy);
  border-radius: var(--radius);
  border: 1px solid var(--subtle-border);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.hero-visual-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.hero-visual-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px;
  background: linear-gradient(180deg, rgba(16, 38, 61, 0) 0%, rgba(16, 38, 61, 0.95) 100%);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  color: var(--white);
}

.hero-visual-caption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #BAC7D5;
}

.hero-visual-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background: rgba(8, 126, 139, 0.85);
  color: var(--white);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

/* Floating micro-badge */
.hero-floating-badge {
  position: absolute;
  bottom: -18px;
  left: 20px;
  background: var(--white);
  border: 1px solid var(--subtle-border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  box-shadow: var(--shadow-hover);
  display: flex;
  align-items: center;
  gap: 10px;
}

.floating-badge-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--teal-light);
  color: var(--teal);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.floating-badge-text {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.2;
}

.floating-badge-sub {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}

/* ==========================================================================
   SECTION 2 — PUBLICATION AUTHORITY
   ========================================================================== */
.authority-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 36px;
}

@media (min-width: 640px) {
  .authority-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .authority-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.authority-card {
  background-color: var(--white);
  border: 1px solid var(--subtle-border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
  position: relative;
}

.authority-card:hover {
  border-color: var(--teal);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.authority-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--teal-light);
  color: var(--teal);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.authority-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.authority-card p {
  font-size: 0.88rem;
  color: var(--body-text);
  line-height: 1.5;
  margin-bottom: 14px;
}

.authority-card .card-anchor {
  margin-top: auto;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--teal);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.authority-footer {
  text-align: center;
}

.link-highlight {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--teal);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  background-color: var(--white);
  border: 1px solid var(--subtle-border);
  transition: all var(--transition-fast);
}

.link-highlight:hover {
  background-color: var(--teal-light);
  border-color: var(--teal-border);
}

/* ==========================================================================
   SECTION 3 — SIX FEATURED PUBLICATIONS (2026)
   ========================================================================== */
.publications-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .publications-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .publications-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pub-card {
  background-color: var(--white);
  border: 1px solid var(--subtle-border);
  border-radius: var(--radius);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
  position: relative;
}

.pub-card:hover {
  border-color: #B5CCE0;
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.pub-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}

.pub-domain {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--teal);
  letter-spacing: 0.04em;
}

.pub-status-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--success-light);
  color: var(--success);
  font-weight: 600;
}

.pub-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.35;
  margin-bottom: 12px;
}

.pub-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--subtle-border);
}

.pub-journal {
  font-weight: 600;
  color: var(--royal-blue);
  font-style: italic;
}

.pub-year {
  color: var(--text-muted);
}

.pub-authors {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.4;
}

.pub-authors strong {
  color: var(--navy);
}

.pub-significance {
  font-size: 0.88rem;
  color: var(--body-text);
  line-height: 1.5;
  margin-bottom: 20px;
  flex-grow: 1;
}

.pub-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--subtle-border);
}

.pub-doi-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 3px;
  word-break: break-all;
}

.pub-doi-link:hover {
  color: var(--teal-hover);
}

/* ==========================================================================
   SECTION 4 — RESEARCH SERVICES
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.service-card {
  background-color: var(--white);
  border: 1px solid var(--subtle-border);
  border-radius: var(--radius);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
  position: relative;
}

.service-card:hover {
  border-color: var(--teal);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.service-card-top {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.service-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background-color: var(--light-bg);
  color: var(--teal);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.service-card:hover .service-icon-box {
  background-color: var(--teal);
  color: var(--white);
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.3;
}

.service-desc {
  font-size: 0.9rem;
  color: var(--body-text);
  line-height: 1.55;
  margin-bottom: 20px;
}

.service-capabilities-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

.service-capabilities-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 26px;
  flex-grow: 1;
}

.service-capabilities-list li {
  font-size: 0.85rem;
  color: var(--navy);
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-capabilities-list li::before {
  content: '';
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--teal);
  flex-shrink: 0;
}

.service-cta-btn {
  margin-top: auto;
  width: 100%;
}

/* ==========================================================================
   SECTION 5 — WHY COLLABORATE WITH US?
   ========================================================================== */
.why-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

@media (min-width: 992px) {
  .why-grid {
    grid-template-columns: 0.95fr 1.05fr;
    gap: 48px;
  }
}

.why-image-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--subtle-border);
  box-shadow: var(--shadow-card);
}

.why-image-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.why-image-badge {
  position: absolute;
  top: 18px;
  left: 18px;
  background-color: rgba(16, 38, 61, 0.88);
  backdrop-filter: blur(8px);
  color: var(--white);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.advantages-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

@media (min-width: 640px) {
  .advantages-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

.advantage-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.advantage-bullet {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--teal-light);
  color: var(--teal);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.advantage-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
}

.advantage-desc {
  font-size: 0.85rem;
  color: var(--body-text);
  line-height: 1.45;
}

/* ==========================================================================
   SECTION 6 — METHODOLOGIES & RESEARCH TOOLS (TABS)
   ========================================================================== */
.tools-tabs-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--subtle-border);
  padding-bottom: 12px;
}

.tab-btn {
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  background-color: var(--light-bg);
  border: 1px solid var(--subtle-border);
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--navy);
  background-color: #EBF1F6;
}

.tab-btn.is-active {
  color: var(--white);
  background-color: var(--navy);
  border-color: var(--navy);
}

.tab-pane {
  display: none;
}

.tab-pane.is-active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.tab-content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  background-color: var(--white);
  border: 1px solid var(--subtle-border);
  border-radius: var(--radius);
  padding: 32px;
}

@media (min-width: 768px) {
  .tab-content-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.tab-info-col h3 {
  font-size: 1.35rem;
  color: var(--navy);
  margin-bottom: 10px;
}

.tab-info-col p {
  font-size: 0.95rem;
  color: var(--body-text);
  line-height: 1.6;
  margin-bottom: 18px;
}

.tool-tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tool-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background-color: var(--light-bg);
  color: var(--navy);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--subtle-border);
}

.tab-details-col {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.tab-spec-box {
  background-color: var(--light-bg);
  border-radius: var(--radius-sm);
  padding: 16px;
  border-left: 3px solid var(--teal);
}

.tab-spec-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
}

.tab-spec-desc {
  font-size: 0.82rem;
  color: var(--body-text);
  line-height: 1.45;
}

/* ==========================================================================
   SECTION 7 — RESEARCH COLLABORATION PROCESS (TIMELINE)
   ========================================================================== */
.timeline-horizontal {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 38px;
  position: relative;
}

@media (min-width: 992px) {
  .timeline-horizontal {
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
  }
}

.timeline-step {
  background-color: var(--white);
  border: 1px solid var(--subtle-border);
  border-radius: var(--radius);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition);
}

.timeline-step:hover {
  border-color: var(--teal);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.step-number {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--teal);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.step-number::after {
  content: '→';
  font-size: 0.95rem;
  color: var(--text-muted);
}

@media (max-width: 991px) {
  .step-number::after {
    display: none;
  }
}

.timeline-step:last-child .step-number::after {
  display: none;
}

.step-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
  line-height: 1.3;
}

.step-desc {
  font-size: 0.82rem;
  color: var(--body-text);
  line-height: 1.45;
}

.process-cta-box {
  text-align: center;
}

/* ==========================================================================
   SECTION 8 — WHO WE WORK WITH (AUDIENCE)
   ========================================================================== */
.audience-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 640px) {
  .audience-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .audience-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

.audience-card {
  background-color: var(--white);
  border: 1px solid var(--subtle-border);
  border-radius: var(--radius);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
}

.audience-card:hover {
  border-color: var(--royal-blue);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.audience-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--royal-blue-light);
  color: var(--royal-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.audience-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.audience-card p {
  font-size: 0.84rem;
  color: var(--body-text);
  line-height: 1.45;
}

/* ==========================================================================
   SECTION 9 — RESEARCH ENQUIRY FORM
   ========================================================================== */
.enquiry-wrapper {
  background-color: var(--white);
  border: 1px solid var(--subtle-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-card);
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .enquiry-wrapper {
    padding: 48px 44px;
  }
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 640px) {
  .form-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.form-group.col-span-2 {
  grid-column: 1 / -1;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
}

.form-label .required {
  color: #DC2626;
  margin-left: 2px;
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--subtle-border);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  background-color: #FAFCFE;
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--teal);
  background-color: var(--white);
  box-shadow: 0 0 0 3px rgba(8, 126, 139, 0.12);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.consent-checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--body-text);
  line-height: 1.45;
  cursor: pointer;
}

.consent-checkbox-label input {
  margin-top: 3px;
  accent-color: var(--teal);
}

.form-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 8px;
}

@media (min-width: 640px) {
  .form-actions {
    flex-direction: row;
    align-items: center;
  }
}

/* Honeypot field for spam bots */
.field-honey {
  display: none !important;
  visibility: hidden !important;
}

/* ==========================================================================
   SECTION 10 — FAQ ACCORDION
   ========================================================================== */
.faq-accordion {
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background-color: var(--white);
  border: 1px solid var(--subtle-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.is-open {
  border-color: var(--teal);
}

.faq-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  background: transparent;
  transition: color var(--transition-fast);
}

.faq-trigger:hover {
  color: var(--teal);
}

.faq-chevron {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform var(--transition);
}

.faq-item.is-open .faq-chevron {
  transform: rotate(180deg);
  color: var(--teal);
}

.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
  padding-left: 24px;
  padding-right: 24px;
}

.faq-item.is-open .faq-content {
  max-height: 600px;
  transition: max-height 0.35s cubic-bezier(1, 0, 1, 0);
  padding-bottom: 22px;
}

.faq-answer {
  font-size: 0.92rem;
  color: var(--body-text);
  line-height: 1.6;
  border-top: 1px dashed var(--subtle-border);
  padding-top: 14px;
}

.faq-answer p + p {
  margin-top: 10px;
}

/* ==========================================================================
   SECTION 11 — FINAL CALL TO ACTION
   ========================================================================== */
.final-cta-section {
  background-color: var(--navy);
  color: var(--white);
  padding-top: 84px;
  padding-bottom: 84px;
  position: relative;
  overflow: hidden;
}

.final-cta-bg-pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0.06;
  pointer-events: none;
  background-image: radial-gradient(#FFFFFF 1px, transparent 1px);
  background-size: 24px 24px;
}

.final-cta-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.final-cta-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1.25;
  margin-bottom: 16px;
}

@media (min-width: 768px) {
  .final-cta-title {
    font-size: 2.75rem;
  }
}

.final-cta-desc {
  font-size: 1.1rem;
  color: #BAC7D5;
  line-height: 1.6;
  margin-bottom: 34px;
}

.final-cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background-color: #0B1B2C;
  color: #BAC7D5;
  padding-top: 72px;
  padding-bottom: 36px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.88rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  }
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.02em;
  margin-bottom: 18px;
  text-transform: uppercase;
}

.footer-col p {
  line-height: 1.6;
  margin-bottom: 16px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  color: #BAC7D5;
  transition: color var(--transition-fast);
}

.footer-links-list a:hover {
  color: #5CE1E6;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  line-height: 1.4;
}

.footer-contact-item svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--teal);
  margin-top: 2px;
}

.footer-ethics-box {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 18px;
  margin-bottom: 36px;
}

.footer-ethics-title {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 6px;
}

.footer-ethics-text {
  font-size: 0.82rem;
  color: #94A3B8;
  line-height: 1.55;
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.8rem;
  color: #94A3B8;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
  }
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a {
  color: #94A3B8;
}

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

/* ==========================================================================
   WHATSAPP CONVERSION ELEMENTS
   ========================================================================== */
/* Desktop Floating WhatsApp Button */
.whatsapp-float-btn {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background-color: var(--whatsapp);
  color: var(--white);
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.45);
  z-index: 990;
  transition: all var(--transition);
  text-decoration: none;
}

@media (min-width: 768px) {
  .whatsapp-float-btn {
    display: flex;
  }
}

.whatsapp-float-btn:hover {
  background-color: var(--whatsapp-dark);
  transform: scale(1.08) translateY(-2px);
  box-shadow: 0 8px 26px rgba(37, 211, 102, 0.55);
  color: var(--white);
}

.whatsapp-pulse {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 2px solid var(--whatsapp);
  animation: pulseAnimation 2s infinite;
  pointer-events: none;
}

@keyframes pulseAnimation {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(1.4); opacity: 0; }
}

.whatsapp-tooltip {
  position: absolute;
  right: calc(100% + 12px);
  background-color: var(--navy);
  color: var(--white);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: var(--shadow-hover);
  pointer-events: none;
  opacity: 0;
  transform: translateX(6px);
  transition: all var(--transition-fast);
}

.whatsapp-float-btn:hover .whatsapp-tooltip {
  opacity: 1;
  transform: translateX(0);
}

/* Mobile Sticky Bottom Bar */
.mobile-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--white);
  border-top: 1px solid var(--subtle-border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  box-shadow: 0 -4px 16px rgba(16, 38, 61, 0.08);
  z-index: 980;
}

@media (min-width: 768px) {
  .mobile-sticky-bar {
    display: none;
  }
}

.mobile-sticky-bar .btn {
  width: 100%;
  font-size: 0.92rem;
  padding: 12px 18px;
}

/* Form confirmation modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(16, 38, 61, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.modal-overlay.is-active {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background-color: var(--white);
  border-radius: var(--radius);
  max-width: 520px;
  width: 100%;
  padding: 32px;
  box-shadow: var(--shadow-float);
  border: 1px solid var(--subtle-border);
  position: relative;
  transform: scale(0.95);
  transition: transform var(--transition);
}

.modal-overlay.is-active .modal-card {
  transform: scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--light-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--navy);
}

.modal-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background-color: var(--success-light);
  color: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.modal-card h3 {
  font-size: 1.35rem;
  color: var(--navy);
  margin-bottom: 8px;
}

.modal-card p {
  font-size: 0.92rem;
  color: var(--body-text);
  line-height: 1.55;
  margin-bottom: 22px;
}

.modal-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Publication modal / drawer preview */
.pub-modal-details {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--body-text);
  margin-bottom: 20px;
  max-height: 280px;
  overflow-y: auto;
  padding-right: 6px;
}