/* ============================================
   AALOK SHANGHVI – SCIENTIFIC GRID DESIGN SYSTEM
   ============================================ */

/* === Google Fonts === */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* === CSS Custom Properties === */
:root {
  /* Primary Palette */
  --blue-900: #061A40;
  --blue-800: #0A2463;
  --blue-700: #0D2F7E;
  --blue-600: #1338A0;
  --blue-500: #1A44C2;
  --blue-400: #3A65D9;
  --blue-300: #6B8DE5;
  --blue-200: #A3B8F0;
  --blue-100: #D1DCFA;
  --blue-50: #EDF1FE;

  /* Teal Accent Palette */
  --teal-700: #0E7367;
  --teal-600: #128C7E;
  --teal-500: #1B998B;
  --teal-400: #2DB8A8;
  --teal-300: #5DD4C6;
  --teal-200: #99E5DC;
  --teal-100: #CCF2EE;
  --teal-50: #E8FAF8;

  /* Neutrals */
  --grey-900: #1A1A2E;
  --grey-800: #2D2D44;
  --grey-700: #404060;
  --grey-600: #5C5C7A;
  --grey-500: #7A7A96;
  --grey-400: #9E9EB2;
  --grey-300: #C0C0D0;
  --grey-200: #E0E0EA;
  --grey-100: #F0F0F5;
  --grey-50: #F8F8FB;

  --white: #FFFFFF;
  --silver: #E8E8E8;

  /* Semantic Colors */
  --bg-primary: var(--white);
  --bg-secondary: var(--grey-50);
  --bg-panel: var(--grey-100);
  --text-primary: var(--grey-900);
  --text-secondary: var(--grey-600);
  --text-muted: var(--grey-500);
  --accent-primary: var(--blue-800);
  --accent-secondary: var(--teal-500);
  --border-color: var(--grey-200);
  --border-subtle: var(--grey-100);

  /* Typography Scale */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Grid */
  --grid-max: 1280px;
  --grid-gap: 1.5rem;

  /* Borders & Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(10, 36, 99, 0.06);
  --shadow-md: 0 4px 12px rgba(10, 36, 99, 0.08);
  --shadow-lg: 0 8px 30px rgba(10, 36, 99, 0.1);
  --shadow-panel: 0 1px 2px rgba(10, 36, 99, 0.04), 0 4px 16px rgba(10, 36, 99, 0.06);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

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

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

body {
  font-family: var(--font-primary);
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-primary);
}

h1 { font-size: var(--text-5xl); letter-spacing: -0.02em; }
h2 { font-size: var(--text-4xl); letter-spacing: -0.015em; }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  font-size: var(--text-base);
  color: var(--text-secondary);
  max-width: 72ch;
}

.label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal-500);
}

.data-label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--grey-500);
}

.data-value {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--blue-800);
}

/* === Top Navigation === */
.nav-top {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-base);
}

.nav-top.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: var(--grid-max);
  margin: 0 auto;
  padding: 0 var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--blue-800), var(--teal-500));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-brand-icon svg {
  width: 20px;
  height: 20px;
}

.nav-brand-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--blue-800);
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-links a {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--grey-600);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-links a:hover {
  color: var(--blue-800);
  background: var(--blue-50);
}

.nav-links a.active {
  color: var(--blue-800);
  background: var(--blue-50);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--teal-500);
  border-radius: 1px;
}

/* Mobile Menu */
.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-2);
  background: none;
  border: none;
}

.nav-mobile-toggle span {
  width: 22px;
  height: 2px;
  background: var(--grey-800);
  border-radius: 1px;
  transition: all var(--transition-fast);
}

/* === Scientific Grid Container === */
.container {
  max-width: var(--grid-max);
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.section {
  padding: var(--space-24) 0;
}

.section-alt {
  background: var(--bg-secondary);
}

/* === Scientific Grid Background === */
.grid-bg {
  position: relative;
}

.grid-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(var(--grey-200) 1px, transparent 1px),
    linear-gradient(90deg, var(--grey-200) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.4;
  pointer-events: none;
  z-index: 0;
}

.grid-bg > * {
  position: relative;
  z-index: 1;
}

/* === Innovation Panels === */
.panel {
  background: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  transition: all var(--transition-base);
}

.panel:hover {
  box-shadow: var(--shadow-panel);
  border-color: var(--blue-200);
}

.panel-highlight {
  border-left: 3px solid var(--teal-500);
}

.panel-dark {
  background: var(--blue-800);
  border-color: var(--blue-700);
  color: var(--white);
}

.panel-dark p {
  color: var(--blue-200);
}

.panel-dark h3, .panel-dark h4 {
  color: var(--white);
}

.panel-gradient {
  background: linear-gradient(135deg, var(--blue-800), var(--blue-600));
  border: none;
  color: var(--white);
}

.panel-gradient p {
  color: var(--blue-200);
}

.panel-gradient h3, .panel-gradient h4 {
  color: var(--white);
}

/* === Data Grid === */
.data-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--grid-gap);
}

.data-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.data-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.data-grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

/* === Section Headers === */
.section-header {
  margin-bottom: var(--space-12);
}

.section-header .label {
  margin-bottom: var(--space-3);
  display: block;
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: var(--text-lg);
}

.section-header-line {
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--teal-500), var(--blue-400));
  border-radius: 2px;
  margin-top: var(--space-4);
}

/* === Hero Layout === */
.hero {
  padding-top: calc(72px + var(--space-20));
  padding-bottom: var(--space-20);
  position: relative;
  overflow: hidden;
  min-height: 85vh;
  display: flex;
  align-items: center;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-text .label {
  margin-bottom: var(--space-4);
}

.hero-text h1 {
  margin-bottom: var(--space-6);
  line-height: 1.1;
}

.hero-text h1 span {
  display: block;
  background: linear-gradient(135deg, var(--blue-800), var(--teal-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text .hero-subtitle {
  font-size: var(--text-xl);
  color: var(--grey-600);
  margin-bottom: var(--space-8);
  max-width: 50ch;
}

.hero-metrics {
  display: flex;
  gap: var(--space-12);
  margin-top: var(--space-10);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-color);
}

.hero-metric {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

/* === Hero Visual === */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 450px;
}

.hero-visual-orb {
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--teal-100), var(--blue-100), var(--blue-200));
  position: relative;
  animation: orbFloat 8s ease-in-out infinite;
}

.hero-visual-orb::before {
  content: '';
  position: absolute;
  top: -30px;
  left: -30px;
  right: -30px;
  bottom: -30px;
  border-radius: 50%;
  border: 1px dashed var(--blue-200);
  animation: orbSpin 20s linear infinite;
}

.hero-visual-orb::after {
  content: '';
  position: absolute;
  top: -60px;
  left: -60px;
  right: -60px;
  bottom: -60px;
  border-radius: 50%;
  border: 1px solid var(--grey-200);
  animation: orbSpin 30s linear infinite reverse;
}

.hero-node {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--teal-500);
  box-shadow: 0 0 12px rgba(27, 153, 139, 0.4);
}

.hero-node:nth-child(1) { top: 5%; left: 50%; }
.hero-node:nth-child(2) { top: 30%; right: 5%; }
.hero-node:nth-child(3) { bottom: 15%; right: 15%; }
.hero-node:nth-child(4) { bottom: 10%; left: 20%; }
.hero-node:nth-child(5) { top: 40%; left: 5%; }

@keyframes orbFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

@keyframes orbSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* === Stat Cards === */
.stat-card {
  text-align: center;
  padding: var(--space-8);
}

.stat-card .data-value {
  font-size: var(--text-4xl);
  display: block;
  margin-bottom: var(--space-2);
}

.stat-card .data-label {
  display: block;
}

/* === Timeline === */
.timeline {
  position: relative;
  padding-left: var(--space-10);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--teal-500), var(--blue-300), var(--grey-200));
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-10);
  padding: var(--space-6) var(--space-8);
  background: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.timeline-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--blue-200);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-10) - 1px);
  top: var(--space-8);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--teal-500);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 2px var(--teal-500);
}

.timeline-year {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--teal-600);
  margin-bottom: var(--space-2);
}

.timeline-item h4 {
  margin-bottom: var(--space-2);
}

/* === Innovation Cards === */
.innovation-card {
  padding: var(--space-8);
  background: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.innovation-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue-200);
}

.innovation-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue-800), var(--teal-500));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.innovation-card:hover::before {
  opacity: 1;
}

.innovation-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--blue-50);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  transition: all var(--transition-base);
}

.innovation-card:hover .innovation-icon {
  background: linear-gradient(135deg, var(--blue-800), var(--teal-500));
}

.innovation-icon svg {
  width: 24px;
  height: 24px;
  color: var(--blue-800);
  transition: color var(--transition-base);
}

.innovation-card:hover .innovation-icon svg {
  color: var(--white);
}

.innovation-card h4 {
  margin-bottom: var(--space-3);
}

/* === Scientific Visual Panels === */
.sci-visual {
  width: 100%;
  height: 300px;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}

.sci-visual-molecular {
  background: linear-gradient(135deg, var(--blue-50), var(--teal-50));
  display: flex;
  align-items: center;
  justify-content: center;
}

.sci-visual-molecular svg {
  width: 80%;
  height: 80%;
  opacity: 0.6;
}

.sci-visual-lab {
  background: linear-gradient(135deg, var(--blue-800), var(--blue-600));
}

.sci-visual-globe {
  background: linear-gradient(135deg, var(--grey-900), var(--blue-800));
}

/* === Media Cards === */
.media-card {
  background: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

.media-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.media-card-image {
  height: 200px;
  background: linear-gradient(135deg, var(--blue-50), var(--teal-50));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.media-card-image svg {
  width: 60px;
  height: 60px;
  color: var(--blue-300);
}

.media-card-body {
  padding: var(--space-6);
}

.media-card-tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal-600);
  background: var(--teal-50);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}

.media-card-body h4 {
  margin-bottom: var(--space-2);
  font-size: var(--text-lg);
}

.media-card-body p {
  font-size: var(--text-sm);
  color: var(--grey-500);
}

.media-card-date {
  font-size: var(--text-xs);
  color: var(--grey-400);
  margin-top: var(--space-3);
  display: block;
}

/* === Gallery Grid === */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
}

.gallery-item {
  aspect-ratio: 4/3;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  cursor: pointer;
  transition: all var(--transition-base);
}

.gallery-item:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

.gallery-item-visual {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gallery-item-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-6);
  background: linear-gradient(transparent, rgba(6, 26, 64, 0.85));
  color: var(--white);
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.gallery-item:hover .gallery-item-overlay {
  transform: translateY(0);
}

.gallery-item-overlay h5 {
  color: var(--white);
  font-size: var(--text-sm);
  margin-bottom: var(--space-1);
}

.gallery-item-overlay p {
  color: var(--blue-200);
  font-size: var(--text-xs);
}

/* === Contact Form === */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--grey-700);
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  color: var(--text-primary);
  background: var(--white);
  transition: all var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--blue-400);
  box-shadow: 0 0 0 3px var(--blue-100);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  background: linear-gradient(135deg, var(--blue-800), var(--blue-600));
  color: var(--white);
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  letter-spacing: 0.02em;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--blue-700), var(--blue-500));
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* === Contact Info Panels === */
.contact-info-card {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.contact-info-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: var(--blue-50);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-info-icon svg {
  width: 20px;
  height: 20px;
  color: var(--blue-800);
}

.contact-info-text h5 {
  font-size: var(--text-sm);
  margin-bottom: var(--space-1);
}

.contact-info-text p {
  font-size: var(--text-sm);
  color: var(--grey-500);
}

.contact-info-text a {
  color: var(--blue-600);
}

.contact-info-text a:hover {
  color: var(--teal-500);
}

/* === Footer === */
.footer {
  background: var(--grey-900);
  color: var(--grey-300);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-brand-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--white);
  margin-bottom: var(--space-4);
}

.footer-brand p {
  font-size: var(--text-sm);
  color: var(--grey-400);
  max-width: 32ch;
}

.footer h6 {
  color: var(--white);
  font-size: var(--text-sm);
  margin-bottom: var(--space-5);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--grey-400);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--teal-300);
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--grey-800);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  font-size: var(--text-sm);
  color: var(--grey-500);
}

.footer-bottom a {
  color: var(--teal-400);
}

.footer-bottom a:hover {
  color: var(--teal-300);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--grey-800);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--teal-600);
  transform: translateY(-2px);
}

.footer-social svg {
  width: 16px;
  height: 16px;
  color: var(--grey-400);
}

.footer-social a:hover svg {
  color: var(--white);
}

/* === Password Gate === */
.gate {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  position: relative;
  overflow: hidden;
}

.gate-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0.3;
  pointer-events: none;
}

.gate-card {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 420px;
  width: 100%;
  padding: var(--space-12);
}

.gate-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-2xl);
  color: var(--blue-800);
  margin-bottom: var(--space-2);
}

.gate-subtitle {
  font-size: var(--text-sm);
  color: var(--grey-500);
  margin-bottom: var(--space-10);
}

.gate-input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.gate-input {
  padding: var(--space-4) var(--space-5);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  text-align: center;
  outline: none;
  transition: all var(--transition-fast);
  letter-spacing: 0.15em;
  background: var(--grey-50);
}

.gate-input:focus {
  border-color: var(--blue-400);
  background: var(--white);
  box-shadow: 0 0 0 4px var(--blue-100);
}

.gate-btn {
  width: 100%;
  padding: var(--space-4);
  background: linear-gradient(135deg, var(--blue-800), var(--blue-600));
  color: var(--white);
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: var(--text-sm);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.gate-btn:hover {
  background: linear-gradient(135deg, var(--blue-700), var(--blue-500));
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.gate-error {
  font-size: var(--text-sm);
  color: #DC3545;
  margin-top: var(--space-4);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.gate-error.visible {
  opacity: 1;
}

/* === Page Transition === */
.page-transition {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--white);
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.page-transition.active {
  opacity: 1;
  pointer-events: all;
}

/* === Page Headers === */
.page-header {
  padding-top: calc(72px + var(--space-16));
  padding-bottom: var(--space-16);
  background: linear-gradient(180deg, var(--blue-50), var(--white));
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(var(--blue-100) 1px, transparent 1px),
    linear-gradient(90deg, var(--blue-100) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.25;
  pointer-events: none;
}

.page-header .container {
  position: relative;
  z-index: 1;
}

.page-header .label {
  margin-bottom: var(--space-4);
  display: block;
}

.page-header h1 {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.page-header p {
  font-size: var(--text-lg);
  max-width: 60ch;
}

/* === Info Grid (About page etc.) === */
.info-block {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-12);
  align-items: start;
}

.info-block-visual {
  border-radius: var(--radius-md);
  overflow: hidden;
  min-height: 350px;
  position: relative;
}

/* === Responsive === */
@media (max-width: 1024px) {
  .data-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .data-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .hero-content { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
  .info-block { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }

  .container { padding: 0 var(--space-5); }
  .section { padding: var(--space-16) 0; }

  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-4);
    box-shadow: var(--shadow-md);
  }
  .nav-mobile-toggle { display: flex; }

  .data-grid-3, .data-grid-4, .data-grid-2 {
    grid-template-columns: 1fr;
  }

  .hero-metrics { flex-direction: column; gap: var(--space-6); }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: var(--space-4); text-align: center; }

  .page-header { padding-top: calc(72px + var(--space-10)); padding-bottom: var(--space-10); }
  .page-header h1 { font-size: var(--text-3xl); }
}

/* === Utility === */
.text-center { text-align: center; }
.text-teal { color: var(--teal-500); }
.text-blue { color: var(--blue-800); }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.gap-4 { gap: var(--space-4); }
.gap-8 { gap: var(--space-8); }

/* === Fade-in Animation === */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === Scroll indicator on Hero === */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.scroll-indicator-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(180deg, var(--blue-300), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* === Blockquote === */
.quote-block {
  padding: var(--space-8);
  border-left: 4px solid var(--teal-500);
  background: var(--teal-50);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.quote-block blockquote {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--blue-800);
  font-weight: 500;
  line-height: 1.5;
}

.quote-block cite {
  display: block;
  font-size: var(--text-sm);
  color: var(--grey-500);
  margin-top: var(--space-3);
  font-style: normal;
}