@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  background-color: var(--bg-stone);
  color: var(--text-dark);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Typography Hierarchy */
h1, h2, h3, h4, .font-display {
  font-family: var(--font-display);
  line-height: 1.2;
  color: inherit;
  letter-spacing: -0.025em;
}

h1 {
  font-size: clamp(2.4rem, 4.5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.035em;
}

h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.025em;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-dark-muted);
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Navigation Bar (Adopt.ai Sticky Header) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(245, 245, 240, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-stone);
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: all 0.3s ease;
}

[data-theme="dark"] .site-header {
  background-color: rgba(6, 11, 30, 0.92);
  border-bottom: 1px solid var(--border-navy);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-dark);
}

.site-logo-img {
  height: 40px;
  width: auto;
  max-width: 170px;
  object-fit: contain;
  display: block;
}

.site-logo-img-footer {
  height: 48px;
  width: auto;
  max-width: 190px;
  object-fit: contain;
  display: block;
}

.brand-logo svg {
  width: 32px;
  height: 32px;
  color: var(--color-electric-blue);
}

.brand-logo .logo-tag {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--bg-navy);
  color: #fff;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.9rem;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-dark);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  background-color: var(--bg-stone-surface);
  border-color: var(--border-stone);
  color: var(--color-electric-blue);
  font-weight: 600;
}

.nav-link svg.chevron {
  width: 10px;
  height: 10px;
  transition: transform 0.2s ease;
}

.nav-item:hover .nav-link svg.chevron {
  transform: rotate(180deg);
}

/* Mega Menu Dropdown */
.mega-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background-color: var(--bg-stone-surface);
  border: 1px solid var(--border-stone);
  box-shadow: var(--shadow-elevated);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  min-width: 680px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

[data-theme="dark"] .mega-dropdown {
  background-color: var(--bg-navy-card);
  border-color: var(--border-navy);
}

.nav-item:hover .mega-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dropdown-col-title {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dark-subtle);
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-stone);
  padding-bottom: 0.4rem;
}

.dropdown-link-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.dropdown-item {
  display: flex;
  flex-direction: column;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  transition: background 0.15s ease;
}

.dropdown-item:hover {
  background-color: var(--bg-stone-muted);
}

.dropdown-item-title {
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-dark);
}

.dropdown-item-desc {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-dark-muted);
}

/* Header Action Buttons */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--bg-navy);
  color: #fff;
  border-color: var(--bg-navy);
}

.btn-primary:hover {
  background-color: var(--color-electric-blue);
  border-color: var(--color-electric-blue);
  box-shadow: 0 4px 15px var(--color-electric-glow);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-dark);
  border-color: var(--border-stone-strong);
}

.btn-outline:hover {
  background-color: var(--bg-stone-surface);
  border-color: var(--text-dark);
  color: var(--text-dark);
}

.btn-electric {
  background-color: var(--color-electric-blue);
  color: #fff;
}

.btn-electric:hover {
  background-color: var(--color-electric-blue-hover);
  box-shadow: 0 4px 20px var(--color-electric-glow);
}

/* Badges & Outlined Pills (Adopt.ai Style) */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  border: 0.5px solid var(--border-stone-strong);
  border-radius: var(--radius-sm);
  background-color: var(--bg-stone-surface);
  color: var(--text-dark);
  letter-spacing: 0.02em;
}

.badge-pill svg.sparkle {
  width: 14px;
  height: 14px;
  fill: var(--color-electric-blue);
}

/* Sections Base */
.section {
  padding: 5rem 0;
  position: relative;
}

.section-dark {
  background-color: var(--bg-navy);
  color: var(--text-light);
}

.section-dark p {
  color: var(--text-light-muted);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
}

.section-header h2 {
  margin-top: 0.75rem;
  margin-bottom: 1rem;
}

/* Bento Grid */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
}

.bento-card {
  background-color: var(--bg-stone-surface);
  border: 1px solid var(--border-stone);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.bento-card:hover {
  border-color: var(--border-stone-strong);
  box-shadow: var(--shadow-elevated);
  transform: translateY(-2px);
}

.bento-col-4 { grid-column: span 4; }
.bento-col-6 { grid-column: span 6; }
.bento-col-8 { grid-column: span 8; }
.bento-col-12 { grid-column: span 12; }

/* Interactive Chaptered Stage Container (Adopt.ai Hero Stage) */
.interactive-stage {
  border: 1px solid var(--border-navy);
  background-color: var(--bg-navy-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-elevated), var(--shadow-navy-glow);
  margin-top: 3rem;
}

.stage-chapters {
  display: flex;
  background-color: var(--bg-navy-card);
  border-bottom: 1px solid var(--border-navy);
  overflow-x: auto;
}

.chapter-tab {
  flex: 1;
  padding: 0.85rem 1.25rem;
  background: none;
  border: none;
  border-right: 1px solid var(--border-navy);
  color: var(--text-light-subtle);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.chapter-tab:hover {
  background-color: var(--bg-navy-elevated);
  color: var(--text-light);
}

.chapter-tab.active {
  background-color: var(--bg-navy-surface);
  color: var(--color-sky-blue);
  border-bottom: 2px solid var(--color-electric-blue);
}

.chapter-num {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  background: var(--bg-navy-elevated);
  padding: 2px 6px;
  border-radius: 3px;
}

.stage-screen {
  padding: 2.5rem;
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 0%, rgba(0, 102, 255, 0.08) 0%, transparent 70%);
}

/* Footer */
.site-footer {
  background-color: var(--bg-navy);
  color: var(--text-light);
  padding: 4.5rem 0 2rem 0;
  border-top: 1px solid var(--border-navy);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(4, 1fr);
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-col-title {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-sky-blue);
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  color: var(--text-light-muted);
  font-size: 0.92rem;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(248, 250, 252, 0.08);
  font-size: 0.85rem;
  color: var(--text-light-subtle);
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .nav-menu { display: none; }
  .bento-col-4, .bento-col-6, .bento-col-8 { grid-column: span 12; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
  .stage-screen { padding: 1rem; }
}