/* ==========================================================================
   InLitho 2027 - India Lithography Workshop (SAMARTH, IIT Gandhinagar)
   Core Stylesheet: assets/css/style.css
   Aesthetic: Light, Clean Professional Conference Design (Inspired by IEEE ICEE)
   Palette: Crisp White, Soft Slate/Grey, Deep Tech Blue, EUV Indigo
   ========================================================================== */

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

/* --- Root Design Tokens (Light Theme) --- */
:root {
  /* Backgrounds */
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-nav: rgba(255, 255, 255, 0.95);
  --bg-footer: #0b1528;

  /* Borders */
  --border-subtle: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-blue: #bae6fd;
  --border-glow: rgba(2, 132, 199, 0.25);

  /* Brand Accents */
  --brand-blue: #0284c7;
  --brand-blue-dark: #0369a1;
  --brand-navy: #0f2b5c;
  --euv-violet: #6366f1;
  --euv-light: #818cf8;
  --laser-cyan: #0284c7;
  --laser-blue: #0284c7;
  --silicon-amber: #d97706;
  --silicon-gold: #b45309;
  --success: #059669;

  /* Text Colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --text-on-dark: #f8fafc;

  /* Typography */
  --font-display: 'Space Grotesk', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.05), 0 2px 6px -1px rgba(0, 0, 0, 0.02);
  --shadow-card-hover: 0 16px 32px -4px rgba(2, 132, 199, 0.12), 0 4px 12px -2px rgba(0, 0, 0, 0.04);
  --shadow-blue: 0 4px 18px rgba(2, 132, 199, 0.25);
  --shadow-gold: 0 4px 18px rgba(217, 119, 6, 0.25);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-pill: 9999px;

  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 10% 10%, rgba(2, 132, 199, 0.04) 0%, transparent 45%),
    radial-gradient(circle at 90% 60%, rgba(99, 102, 241, 0.04) 0%, transparent 50%),
    linear-gradient(rgba(15, 23, 42, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.03) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 48px 48px, 48px 48px;
  background-attachment: fixed;
}

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

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

/* --- Layout Container --- */
.container {
  width: 100%;
  max-width: 1260px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-narrow {
  max-width: 960px;
}

/* --- Header & Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-nav);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition);
}

.site-header.scrolled {
  background: #ffffff;
  border-bottom-color: var(--border-medium);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  height: 42px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.925rem;
  font-weight: 500;
  color: #334155;
  padding: 0.5rem 0.6rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--brand-blue);
}

.nav-link.active {
  color: var(--brand-blue);
  font-weight: 700;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0.6rem;
  right: 0.6rem;
  height: 2.5px;
  background: linear-gradient(90deg, var(--brand-blue), var(--euv-violet));
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mobile-toggle {
  display: none;
  background: #ffffff;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  color: var(--text-primary);
  cursor: pointer;
}

/* --- Buttons & Badges --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.925rem;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.28);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0369a1 0%, #1d4ed8 100%);
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.38);
  transform: translateY(-2px);
}

.btn-outline {
  background: #ffffff;
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
  border-color: var(--brand-blue);
  background: #f0f9ff;
  color: var(--brand-blue-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.15);
}

.btn-amber {
  background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
  color: #ffffff;
  box-shadow: var(--shadow-gold);
}

.btn-amber:hover {
  background: linear-gradient(135deg, #b45309 0%, #92400e 100%);
  transform: translateY(-2px);
}

.btn-sm {
  font-size: 0.825rem;
  padding: 0.45rem 0.95rem;
}

.btn-lg {
  font-size: 1rem;
  padding: 0.85rem 1.85rem;
  border-radius: var(--radius-lg);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.775rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
}

.badge-euv {
  color: #5b21b6;
  background: #f3e8ff;
  border-color: #ddd6fe;
}

.badge-cyan {
  color: #0369a1;
  background: #e0f2fe;
  border-color: #bae6fd;
}

.badge-amber {
  color: #92400e;
  background: #fef3c7;
  border-color: #fde68a;
}

/* --- Hero Section --- */
.hero-section,
.page-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-subtle);
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.hero-section {
  padding: 5rem 0 4.5rem;
}

.page-hero {
  padding: 4.5rem 0 3.5rem;
}

.page-hero .container {
  position: relative;
  z-index: 2;
}

.hero-canvas,
.semiconductor-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 980px;
  margin: 0 auto;
}

.hero-meta-badge {
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.3rem, 4.8vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: #0f172a;
  margin-bottom: 1.25rem;
}

.hero-title-gradient {
  background: linear-gradient(135deg, #0f2b5c 0%, #0284c7 50%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--text-secondary);
  font-weight: 400;
  max-width: 820px;
  margin: 0 auto 2rem;
  line-height: 1.65;
}

.hero-info-pills {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.info-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: #ffffff;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-pill);
  padding: 0.5rem 1.25rem;
  font-size: 0.9rem;
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.info-pill svg {
  color: var(--brand-blue);
}

.hero-organizer {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--brand-navy);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 2.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

/* --- Countdown Timer Widget --- */
.countdown-container {
  max-width: 680px;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 1.5rem 2rem;
  box-shadow: var(--shadow-card);
}

.countdown-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--brand-blue-dark);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
}

.countdown-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.countdown-item {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.85rem 0.5rem;
  text-align: center;
}

.countdown-number {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  font-weight: 800;
  color: #0f172a;
  line-height: 1;
}

.countdown-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.35rem;
  font-weight: 600;
}

/* --- Quick Facts Ribbon --- */
.quick-facts-section {
  padding: 3rem 0;
  background: #ffffff;
  border-bottom: 1px solid var(--border-subtle);
}

.facts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.fact-card {
  background: var(--bg-page);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.fact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-blue), var(--euv-violet));
  opacity: 0;
  transition: var(--transition);
}

.fact-card:hover {
  transform: translateY(-3px);
  background: #ffffff;
  border-color: var(--border-blue);
  box-shadow: var(--shadow-card-hover);
}

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

.fact-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: #e0f2fe;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-blue-dark);
  margin-bottom: 1rem;
}

.fact-title {
  font-family: var(--font-display);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  font-weight: 600;
}

.fact-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
}

/* --- Section Typography & Containers --- */
.section {
  padding: 5rem 0;
  position: relative;
}

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

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--brand-blue-dark);
  margin-bottom: 0.75rem;
  display: inline-block;
  font-weight: 600;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.2vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: #0f172a;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* --- Cards & Grid Layouts --- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.card {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 2rem;
  transition: var(--transition);
  position: relative;
  box-shadow: var(--shadow-card);
}

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  background: #f0fdf4;
  background: linear-gradient(135deg, #e0f2fe 0%, #ede9fe 100%);
  border: 1px solid #bae6fd;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-blue-dark);
  margin-bottom: 1.25rem;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: #0f172a;
}

.card-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* --- Themes Preview & Detail Cards --- */
.theme-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  border-top: 3px solid transparent;
}

.theme-card:hover {
  border-top-color: var(--brand-blue);
}

.theme-number {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--silicon-amber);
  margin-bottom: 0.5rem;
  letter-spacing: 0.1em;
}

/* --- National Semiconductor Spotlight --- */
.semiconductor-spotlight {
  background: linear-gradient(135deg, #0f2b5c 0%, #1e3a8a 100%);
  border-radius: var(--radius-xl);
  padding: 3rem;
  margin: 3rem 0;
  position: relative;
  overflow: hidden;
  color: #ffffff;
  box-shadow: 0 16px 36px rgba(15, 43, 92, 0.15);
}

.semiconductor-spotlight p {
  color: #e2e8f0;
}

.ecosystem-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.eco-tag {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
}

/* --- Schedule Tab Component --- */
.schedule-tabs {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.schedule-tab-btn {
  background: #ffffff;
  border: 1px solid var(--border-medium);
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.75rem 2rem;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.schedule-tab-btn.active,
.schedule-tab-btn:hover {
  background: var(--brand-blue);
  border-color: var(--brand-blue);
  color: #ffffff;
  box-shadow: var(--shadow-blue);
}

.timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 28px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: #cbd5e1;
}

.timeline-item {
  position: relative;
  padding-left: 70px;
  margin-bottom: 1.75rem;
}

.timeline-dot {
  position: absolute;
  left: 20px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  border: 3px solid var(--brand-blue);
  box-shadow: 0 0 0 3px #e0f2fe;
}

.timeline-time {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--brand-blue-dark);
  margin-bottom: 0.25rem;
  font-weight: 700;
}

.timeline-content {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-card);
}

.timeline-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 0.25rem;
}

.timeline-desc {
  font-size: 0.925rem;
  color: var(--text-secondary);
}

/* --- Sponsorship Table --- */
.pricing-table-container {
  overflow-x: auto;
  margin: 2.5rem 0;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-subtle);
  background: #ffffff;
  box-shadow: var(--shadow-card);
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.pricing-table th,
.pricing-table td {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.pricing-table th {
  font-family: var(--font-display);
  background: #f8fafc;
  color: #0f172a;
  font-size: 1.05rem;
}

.pricing-table td {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.pricing-table tr:hover td {
  background: #f8fafc;
}

.tier-badge-diamond {
  color: #6366f1;
  font-weight: 800;
  font-size: 1.15rem;
}

.tier-badge-gold {
  color: #d97706;
  font-weight: 800;
  font-size: 1.15rem;
}

.tier-price {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 800;
  color: #0f172a;
  display: block;
  margin-top: 0.25rem;
}

.check-icon {
  color: var(--success);
  font-size: 1.25rem;
  font-weight: 800;
}

.cross-icon {
  color: var(--text-muted);
  font-size: 1.25rem;
}

/* --- Interactive Glossary --- */
.glossary-search-box {
  max-width: 600px;
  margin: 0 auto 2rem;
  position: relative;
}

.glossary-input {
  width: 100%;
  background: #ffffff;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-pill);
  padding: 0.85rem 1.5rem 0.85rem 3rem;
  color: #0f172a;
  font-family: var(--font-body);
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.glossary-input:focus {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px #e0f2fe;
}

.glossary-search-icon {
  position: absolute;
  left: 1.2rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.glossary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.glossary-card {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.glossary-card:hover {
  border-color: var(--border-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.glossary-term {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--brand-blue-dark);
  margin-bottom: 0.5rem;
}

.glossary-def {
  color: var(--text-secondary);
  font-size: 0.925rem;
  line-height: 1.55;
}

/* --- FAQ Accordion --- */
.faq-container {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  text-align: left;
  background: transparent;
  border: none;
  color: #0f172a;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-icon {
  transition: transform 0.3s ease;
  color: var(--brand-blue);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-item.active {
  border-color: var(--brand-blue);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  padding: 0 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  padding-bottom: 1.25rem;
}

/* --- Forms & Inputs --- */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 0.4rem;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  background: #ffffff;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  color: #0f172a;
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px #e0f2fe;
}

/* --- Modals --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(6px);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  padding: 1.5rem;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  max-width: 520px;
  width: 100%;
  padding: 2.5rem;
  position: relative;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.15);
  transform: scale(0.95);
  transition: var(--transition);
}

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

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.5rem;
}

/* --- Footer (Grounded Deep Tech Navy) --- */
.site-footer {
  background: var(--bg-footer);
  color: #ffffff;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 4.5rem 0 2rem;
  margin-top: 5rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand p {
  color: #cbd5e1;
  font-size: 0.925rem;
  margin: 1rem 0 1.5rem;
  max-width: 340px;
}

.site-footer p {
  color: #cbd5e1;
}

.site-footer strong {
  color: #ffffff;
}

.footer-col-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

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

.footer-links a {
  color: #cbd5e1;
  font-size: 0.925rem;
}

.footer-links a:hover {
  color: #38bdf8;
  padding-left: 4px;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: #94a3b8;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background: #0f172a;
  color: #ffffff;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* --- Responsive Media Queries --- */
@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 76px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 2rem 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border-medium);
    display: none;
    max-height: calc(100vh - 76px);
    overflow-y: auto;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  }

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

  .mobile-toggle {
    display: block;
  }

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

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

  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

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