/* ============================================================
   ATG-C — Main Stylesheet
   Aesthetic: Minimalist, Scandinavian, content-first
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #374151;
  background: #FFFFFF;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: #2563EB;
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: #1D4ED8;
}

a:focus-visible {
  outline: 2px solid #2563EB;
  outline-offset: 2px;
  border-radius: 2px;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

button:focus-visible {
  outline: 2px solid #2563EB;
  outline-offset: 2px;
  border-radius: 2px;
}

/* --- Layout --- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section--alt {
  background: #F8FAFC;
}

/* --- Typography --- */
h1, h2, h3 {
  color: #111827;
}

.section-heading {
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-intro {
  font-size: 16px;
  color: #6B7280;
  max-width: 640px;
  margin-bottom: 48px;
}

/* ============================================================
   STICKY NAV
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #FFFFFF;
  height: 64px;
  display: flex;
  align-items: center;
  transition: box-shadow 0.2s ease;
}

.site-header.is-scrolled {
  box-shadow: 0 1px 0 #E5E7EB;
}

.nav-container {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo img {
  display: block;
  width: 140px;
  height: auto;
}

.nav-menu {
  display: flex;
  gap: 36px;
  align-items: center;
}

.nav-menu a {
  font-size: 14px;
  font-weight: 500;
  color: #374151;
  letter-spacing: 0.2px;
  transition: color 0.15s ease;
}

.nav-menu a:hover {
  color: #2563EB;
}

.nav-menu a.is-active {
  color: #2563EB;
}

/* --- Nav Dropdown --- */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 500;
  color: #374151;
  letter-spacing: 0.2px;
  transition: color 0.15s ease;
  cursor: pointer;
  padding: 0;
  background: none;
  border: none;
  font-family: inherit;
}

.nav-dropdown-trigger:hover,
.nav-dropdown-trigger.is-active {
  color: #2563EB;
}

.nav-dropdown-caret {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  margin-top: 1px;
  transition: transform 0.2s ease;
}

.nav-dropdown.is-open .nav-dropdown-caret {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: -12px;
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  min-width: 240px;
  padding: 6px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.15s ease, visibility 0.15s ease, transform 0.15s ease;
  z-index: 200;
}

.nav-dropdown.is-open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-menu a {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 400;
  color: #374151;
  transition: background 0.1s ease, color 0.1s ease;
}

.nav-dropdown-menu a:hover {
  background: #F8FAFC;
  color: #2563EB;
}

.nav-dropdown-menu a.is-active {
  color: #2563EB;
  font-weight: 500;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  padding: 0;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: #374151;
  border-radius: 1px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding: 100px 0 48px;
  text-align: center;
}

.hero-headline {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.hero-sub {
  font-size: 20px;
  font-weight: 400;
  color: #6B7280;
  max-width: 600px;
  margin: 0 auto 0;
  line-height: 1.5;
}

/* Hero statement block */
.hero-statement {
  text-align: center;
  padding: 48px 0 64px;
}

.hero-statement-body {
  font-size: 18px;
  line-height: 1.6;
  color: #1E40AF;
  max-width: 680px;
  margin: 0 auto;
}

.hero-statement-body strong {
  font-weight: 600;
  color: #1E3A8A;
}

.hero-statement-kicker {
  font-size: 20px;
  font-weight: 400;
  color: #6B7280;
  margin-top: 20px;
  letter-spacing: 0.5px;
}

.btn-primary {
  display: inline-block;
  padding: 14px 36px;
  font-size: 15px;
  font-weight: 600;
  color: #FFFFFF;
  background: #2563EB;
  border-radius: 6px;
  transition: background 0.15s ease;
  letter-spacing: 0.2px;
}

.btn-primary:hover {
  background: #1D4ED8;
  color: #FFFFFF;
}

.btn-primary:focus-visible {
  outline: 2px solid #2563EB;
  outline-offset: 3px;
}

/* ============================================================
   OVERVIEW CARDS (Homepage — links to subpages)
   ============================================================ */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.overview-card {
  display: flex;
  flex-direction: column;
  background: #F8FAFC;
  border-radius: 8px;
  padding: 36px 32px 32px;
  text-decoration: none;
  color: inherit;
  transition: background 0.15s ease, box-shadow 0.2s ease, transform 0.2s ease;
  border: 1px solid transparent;
}

.overview-card:hover {
  background: #F1F5F9;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
  color: inherit;
}

.overview-card:focus-visible {
  outline: 2px solid #2563EB;
  outline-offset: 2px;
  border-radius: 8px;
}

.overview-card-title {
  font-size: 20px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 12px;
}

.overview-card-desc {
  font-size: 15px;
  color: #6B7280;
  line-height: 1.55;
  margin-bottom: 20px;
  flex: 1;
}

.overview-card-link {
  font-size: 14px;
  font-weight: 500;
  color: #2563EB;
  transition: color 0.15s ease;
}

.overview-card:hover .overview-card-link {
  color: #1D4ED8;
}

/* ============================================================
   GET STARTED — STEPS
   ============================================================ */
.steps {
  max-width: 700px;
  counter-reset: step-counter;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 40px;
}

.step:last-child {
  margin-bottom: 0;
}

.step-number {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1.5px solid #E5E7EB;
  font-size: 14px;
  font-weight: 600;
  color: #374151;
  line-height: 1;
  margin-top: 2px;
}

.step-body {
  flex: 1;
}

.step-title {
  font-size: 17px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 4px;
}

.step-desc {
  font-size: 15px;
  color: #6B7280;
  line-height: 1.55;
}

.step-desc a {
  font-weight: 500;
}

/* ============================================================
   TEAM
   ============================================================ */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.team-member {
  padding: 8px 0;
}

.team-name {
  font-size: 16px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 4px;
}

.team-role {
  font-size: 14px;
  color: #6B7280;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: #111827;
  padding: 64px 0 48px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.footer-logo {
  width: 120px;
  height: auto;
  margin-bottom: 12px;
}

.footer-tagline {
  font-size: 14px;
  color: #9CA3AF;
}

.footer-links {
  display: flex;
  gap: 28px;
}

.footer-links a {
  font-size: 14px;
  color: #D1D5DB;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-copy {
  font-size: 13px;
  color: #6B7280;
  margin-top: 16px;
}

/* ============================================================
   SUBPAGE CONTENT STYLES
   ============================================================ */
.page-content {
  max-width: 860px;
  margin: 0 auto;
  padding: 100px 24px 80px;
}

.page-title {
  font-size: 32px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 16px;
}

.page-intro {
  font-size: 17px;
  color: #6B7280;
  line-height: 1.6;
  margin-bottom: 48px;
  max-width: 720px;
}

.content-section {
  margin-bottom: 48px;
}

.content-section:last-child {
  margin-bottom: 0;
}

.content-section h2 {
  font-size: 24px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 16px;
  padding-top: 8px;
}

.content-section h3 {
  font-size: 18px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 12px;
}

.content-section p {
  font-size: 15px;
  line-height: 1.65;
  color: #374151;
  margin-bottom: 16px;
}

.content-section p:last-child {
  margin-bottom: 0;
}

.content-section strong {
  color: #111827;
}

.content-section a {
  font-weight: 500;
  word-break: break-word;
}

.content-section ul,
.content-section ol {
  padding-left: 20px;
  margin-bottom: 16px;
}

.content-section ul {
  list-style: disc;
}

.content-section ol {
  list-style: decimal;
}

.content-section li {
  font-size: 15px;
  line-height: 1.6;
  color: #374151;
  margin-bottom: 6px;
}

.content-section li:last-child {
  margin-bottom: 0;
}

/* Callout / warning box */
.callout {
  padding: 20px 24px;
  border-radius: 8px;
  margin-bottom: 32px;
  font-size: 15px;
  line-height: 1.6;
}

.callout p {
  margin-bottom: 8px;
}

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

.callout--warning {
  background: #FEF3C7;
  border-left: 4px solid #F59E0B;
  color: #92400E;
}

.callout--info {
  background: #EFF6FF;
  border-left: 4px solid #2563EB;
  color: #1E40AF;
}

.callout--note {
  background: #F0FDF4;
  border-left: 4px solid #22C55E;
  color: #166534;
}

/* Spec grid (label/value pairs) */
.spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-bottom: 32px;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  overflow: hidden;
}

.spec-item {
  padding: 16px 20px;
  border-bottom: 1px solid #E5E7EB;
}

.spec-item:nth-last-child(-n+2) {
  border-bottom: none;
}

.spec-item:nth-child(odd) {
  border-right: 1px solid #E5E7EB;
}

.spec-label {
  font-size: 13px;
  font-weight: 500;
  color: #6B7280;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.spec-value {
  font-size: 15px;
  color: #111827;
  line-height: 1.5;
}

/* Reference list */
.reference-list {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
}

.reference-list li {
  font-size: 14px;
  line-height: 1.6;
  color: #6B7280;
  margin-bottom: 10px;
  padding-left: 24px;
  position: relative;
}

.reference-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #D1D5DB;
}

.reference-list li:last-child {
  margin-bottom: 0;
}

.reference-list li a {
  font-weight: 400;
}

/* Text link (prominent) */
.text-link {
  font-weight: 500;
}

/* Prominent CTA link on subpages */
.subpage-cta {
  display: inline-block;
  margin-top: 16px;
  margin-bottom: 32px;
  padding: 14px 36px;
  font-size: 15px;
  font-weight: 600;
  color: #FFFFFF;
  background: #2563EB;
  border-radius: 6px;
  transition: background 0.15s ease;
  letter-spacing: 0.2px;
  text-decoration: none;
}

.subpage-cta:hover {
  background: #1D4ED8;
  color: #FFFFFF;
}

/* Coming-soon placeholder */
.coming-soon-section {
  opacity: 0.55;
  padding: 32px;
  background: #F8FAFC;
  border-radius: 8px;
  margin-bottom: 24px;
}

.coming-soon-section h3 {
  margin-bottom: 8px;
}

.coming-soon-section p {
  font-size: 15px;
  color: #6B7280;
  margin-bottom: 8px;
}

.coming-soon-section p:last-child {
  margin-bottom: 0;
}

.coming-soon-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: #6B7280;
  text-transform: uppercase;
  background: #E5E7EB;
  padding: 3px 10px;
  border-radius: 4px;
  margin-top: 4px;
}

/* Subpage workflow steps */
.page-content .steps {
  max-width: 100%;
}

/* Dimension cards (CRISPR page) */
.dimension-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 32px;
}

.dimension-card {
  padding: 20px 24px;
  background: #F8FAFC;
  border-radius: 8px;
  border: 1px solid #E5E7EB;
}

.dimension-card h4 {
  font-size: 15px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 6px;
}

.dimension-card p {
  font-size: 14px;
  color: #6B7280;
  line-height: 1.5;
  margin-bottom: 0;
}

/* ============================================================
   CTA ROW (side-by-side buttons on subpages)
   ============================================================ */
.page-cta-row {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.subpage-cta--outline {
  background: #EFF6FF;
  color: #2563EB;
}

.subpage-cta--outline:hover {
  background: #DBEAFE;
  color: #1D4ED8;
}

/* ============================================================
   ON-PAGE JUMP LINKS
   ============================================================ */
.page-jump-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.page-jump-links a {
  font-size: 14px;
  font-weight: 500;
  color: #374151;
  padding: 6px 16px;
  border: 1px solid #D1D5DB;
  border-radius: 6px;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.page-jump-links a:hover {
  color: #2563EB;
  border-color: #2563EB;
  background: #EFF6FF;
}

/* ============================================================
   CONTENT FIGURES
   ============================================================ */
.content-figure {
  margin: 24px 0 32px;
}

.content-figure img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid #E5E7EB;
}

.content-figure figcaption {
  font-size: 13px;
  color: #6B7280;
  margin-top: 10px;
  line-height: 1.5;
}

.content-figure--compact {
  max-width: 480px;
}

.content-figure--compact img {
  max-width: 100%;
}

/* ============================================================
   FAQ ACCORDION
   ============================================================ */
.faq-list {
  border-top: 1px solid #E5E7EB;
}

.faq-item {
  border-bottom: 1px solid #E5E7EB;
}

.faq-question {
  display: block;
  width: 100%;
  padding: 16px 28px 16px 0;
  font-size: 15px;
  font-weight: 500;
  color: #111827;
  cursor: pointer;
  list-style: none;
  position: relative;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::marker {
  display: none;
  content: "";
}

.faq-question::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 16px;
  font-size: 18px;
  font-weight: 300;
  color: #9CA3AF;
  line-height: 1;
}

.faq-item[open] .faq-question::after {
  content: "\2212";
}

.faq-answer {
  padding: 0 0 16px;
}

.faq-answer p {
  font-size: 15px;
  line-height: 1.65;
  color: #374151;
  margin-bottom: 8px;
}

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

.faq-answer a {
  font-weight: 500;
}

/* ============================================================
   TEAM PAGE
   ============================================================ */
.team-page-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
}

.team-page-member {
  text-align: center;
}

.team-page-photo {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: #E5E7EB;
  margin: 0 auto 16px;
  overflow: hidden;
}

.team-page-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-page-name {
  font-size: 16px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 4px;
}

.team-page-role {
  font-size: 14px;
  color: #6B7280;
}

.team-page-affiliation {
  font-size: 13px;
  color: #9CA3AF;
  line-height: 1.4;
  margin-top: 4px;
}

.team-group-box {
  background: #F8FAFC;
  border: 1px solid #E5E7EB;
  border-radius: 12px;
  padding: 32px;
}

.team-page-tag {
  font-weight: 400;
  color: #6B7280;
  font-size: 14px;
}

@media (max-width: 900px) {
  .team-page-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }
}

@media (max-width: 640px) {
  .team-page-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .team-group-box {
    padding: 24px 20px;
  }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet */
@media (max-width: 900px) {
  .overview-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .team-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .hero-headline {
    font-size: 44px;
  }

  .hero-sub {
    font-size: 18px;
  }

  .section {
    padding: 80px 0;
  }

  .hero {
    padding: 100px 0 80px;
  }

  .spec-grid {
    grid-template-columns: 1fr;
  }

  .spec-item:nth-child(odd) {
    border-right: none;
  }

  .spec-item:nth-last-child(-n+2) {
    border-bottom: 1px solid #E5E7EB;
  }

  .spec-item:last-child {
    border-bottom: none;
  }

  .dimension-grid {
    grid-template-columns: 1fr;
  }
}

/* Mobile */
@media (max-width: 640px) {
  .section {
    padding: 64px 0;
  }

  .hero {
    padding: 80px 0 64px;
  }

  .hero-headline {
    font-size: 38px;
  }

  .hero-sub {
    font-size: 17px;
  }

  .section-heading {
    font-size: 26px;
  }

  /* Mobile nav */
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #FFFFFF;
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
    border-bottom: 1px solid #E5E7EB;
  }

  .nav-menu.is-open {
    display: flex;
  }

  .nav-menu > li {
    width: 100%;
  }

  .nav-menu > li > a {
    display: block;
    padding: 14px 24px;
    font-size: 15px;
  }

  .nav-menu > li > a:hover {
    background: #F8FAFC;
  }

  /* Mobile dropdown */
  .nav-dropdown {
    width: 100%;
  }

  .nav-dropdown-trigger {
    display: flex;
    width: 100%;
    padding: 14px 24px;
    font-size: 15px;
    text-align: left;
  }

  .nav-dropdown-trigger:hover {
    background: #F8FAFC;
  }

  .nav-dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    border-radius: 0;
    min-width: 0;
    padding: 0;
    display: none;
    background: #FFFFFF;
  }

  .nav-dropdown.is-open .nav-dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-dropdown-menu a {
    padding: 12px 24px 12px 48px;
    font-size: 14px;
    color: #6B7280;
  }

  .nav-dropdown-menu a:hover {
    background: #F8FAFC;
    color: #2563EB;
  }

  /* Cards */
  .overview-grid {
    grid-template-columns: 1fr;
  }

  /* Team */
  .team-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* Steps */
  .step {
    gap: 16px;
  }

  /* Footer */
  .footer-links {
    flex-direction: column;
    gap: 12px;
  }

  /* Subpage */
  .page-content {
    padding: 80px 20px 64px;
  }

  .page-title {
    font-size: 26px;
  }

  .page-intro {
    font-size: 16px;
  }
}

/* ============================================================
   PRINT
   ============================================================ */
@media print {
  .site-header,
  .nav-toggle {
    display: none;
  }

  .section {
    padding: 40px 0;
  }
}