/* ===================================================================
   LS LABS - MAIN STYLESHEET
   Implements Hero, Mega-Menu, Interactive Cards & System Layout
   =================================================================== */

@import url('tokens.css');

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-dark-void);
  color: var(--text-body);
  line-height: 1.65;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

/* Background Atmosphere Glows */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1200px;
  height: 800px;
  background: radial-gradient(circle 500px at 50% 120px, rgba(59, 130, 246, 0.14) 0%, rgba(139, 124, 246, 0.08) 45%, transparent 75%);
  pointer-events: none;
  z-index: 0;
}

/* Utility Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-heading);
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.gradient-text {
  background: linear-gradient(135deg, #60A5FA 0%, #8B7CF6 70%, #C4B5FD 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline;
}

.eyebrow {
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-slate-muted);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.eyebrow-pill {
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: var(--color-blue-bright);
}

/* Status Badges & Chips */
.badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-heading);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  text-transform: uppercase;
}

.badge-beta {
  background: rgba(139, 124, 246, 0.16);
  color: #C4B5FD;
  border: 1px solid rgba(139, 124, 246, 0.3);
}

.badge-preview {
  background: rgba(59, 130, 246, 0.16);
  color: #93C5FD;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.badge-public {
  background: rgba(34, 197, 94, 0.16);
  color: #86EFAC;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.badge-research {
  background: rgba(245, 158, 11, 0.16);
  color: #FCD34D;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

/* ===================================================================
   GLOBAL HEADER & NAVIGATION
   =================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 11, 20, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-dark-subtle);
  transition: background var(--transition-base), border-color var(--transition-base);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  cursor: pointer;
}

.brand-emblem {
  width: 32px;
  height: 32px;
  display: block;
}

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

.brand-name {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text-white);
  line-height: 1;
}

.brand-subtitle {
  font-family: var(--font-heading);
  font-size: 0.5625rem;
  font-weight: 600;
  letter-spacing: 0.26em;
  color: var(--color-slate-muted);
  margin-top: 3px;
}

/* Desktop Navigation Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-item.is-open .nav-link {
  color: var(--text-white);
  background: rgba(229, 234, 242, 0.06);
}

.nav-link svg.chevron {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-fast);
}

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

/* Action Buttons in Header */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #3B82F6 0%, #2563EB 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 18px rgba(59, 130, 246, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #60A5FA 0%, #3B82F6 100%);
  box-shadow: 0 6px 24px rgba(59, 130, 246, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(15, 23, 42, 0.8);
  color: var(--text-heading);
  border-color: var(--border-dark-strong);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(30, 41, 59, 0.9);
  border-color: rgba(229, 234, 242, 0.3);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-subtle {
  background: transparent;
  color: var(--text-muted);
  font-size: 0.875rem;
  padding: 8px 14px;
}

.btn-subtle:hover {
  color: var(--text-white);
  background: rgba(229, 234, 242, 0.05);
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-white);
  cursor: pointer;
  padding: 8px;
}

/* ===================================================================
   MEGA MENU (Section 6 of Architecture Spec)
   =================================================================== */

/* Header Container Anchor */
.site-header .container {
  position: relative;
}

.nav-item.has-dropdown {
  position: static;
}

.mega-menu-wrapper {
  position: absolute;
  top: calc(100% + 8px);
  left: 12px;
  right: 12px;
  margin: 0 auto;
  max-width: 1140px;
  width: auto;
  background: rgba(11, 19, 43, 0.96);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border: 1px solid var(--border-dark-strong);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px -8px rgba(0, 0, 0, 0.7), 0 0 32px rgba(59, 130, 246, 0.12);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  transform: translateY(-8px);
  z-index: 1000;
  padding: 32px 36px;
}

.nav-item.is-open .mega-menu-wrapper {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.mega-menu-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.mega-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mega-column-title {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-slate-muted);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-dark-subtle);
}

.mega-card {
  display: flex;
  flex-direction: column;
  padding: 12px;
  border-radius: var(--radius-md);
  text-decoration: none;
  background: transparent;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.mega-card:hover,
.mega-card:focus-visible {
  background: rgba(229, 234, 242, 0.05);
  border-color: var(--border-dark-subtle);
  transform: translateX(2px);
}

.mega-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
}

.mega-card-name {
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-heading);
}

.mega-card:hover .mega-card-name {
  color: var(--color-blue-bright);
}

.mega-card-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* ===================================================================
   HERO SECTION (Visual matching reference sheet 07)
   =================================================================== */

.hero-section {
  position: relative;
  padding-top: 64px;
  padding-bottom: 100px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
  z-index: 2;
}

.hero-headline {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--text-white);
}

.hero-subhead {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-body);
  line-height: 1.6;
  max-width: 580px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 8px;
}

/* Hero Atmospheric Canvas / Artwork */
.hero-visual-card {
  position: relative;
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, #0A1428 0%, #060B14 100%);
  border: 1px solid var(--border-dark-strong);
  overflow: hidden;
  box-shadow: var(--shadow-card), 0 0 60px rgba(59, 130, 246, 0.15);
  min-height: 480px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 32px;
}

/* Mountain Silhouette & Floating Prism Artwork */
.artwork-container {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.artwork-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.visual-quote-wrap {
  position: relative;
  z-index: 1;
  text-align: right;
  margin-left: auto;
  max-width: 240px;
}

.visual-quote-title {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  font-weight: 700;
  color: rgba(229, 234, 242, 0.85);
  text-transform: uppercase;
  line-height: 1.5;
}

.visual-quote-sub {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--color-slate-muted);
  text-transform: uppercase;
  margin-top: 4px;
}

.visual-footer-tag {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(229, 234, 242, 0.1);
  padding-top: 16px;
  font-family: var(--font-heading);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--color-slate-muted);
  text-transform: uppercase;
}

/* ===================================================================
   TICKER / KEYWORD STRIP
   =================================================================== */

.feature-ticker {
  background: rgba(11, 19, 43, 0.6);
  border-top: 1px solid var(--border-dark-subtle);
  border-bottom: 1px solid var(--border-dark-subtle);
  padding: 18px 0;
  margin-top: 20px;
}

.ticker-track {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--color-slate-muted);
  text-transform: uppercase;
}

.ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.ticker-separator {
  color: var(--color-blue);
  opacity: 0.5;
}

/* ===================================================================
   PRODUCT APPLICATION: DASHBOARD CARD (Reference Sheet 08)
   =================================================================== */

.dashboard-showcase-section {
  padding: 100px 0 80px;
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  color: var(--text-white);
  margin-top: 12px;
  margin-bottom: 16px;
}

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

.dashboard-card-wrap {
  max-width: 760px;
  margin: 0 auto;
}

.dashboard-card {
  background: #FFFFFF;
  color: #0F172A;
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  box-shadow: 0 25px 60px -10px rgba(0, 0, 0, 0.5), 0 0 40px rgba(59, 130, 246, 0.2);
  border: 1px solid #E2E8F0;
  transition: transform var(--transition-base);
}

.dashboard-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.dashboard-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.15rem;
  color: #0B1F3B;
}

.dashboard-time-select {
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 600;
  color: #475569;
  background: #F1F5F9;
  border: 1px solid #CBD5E1;
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  cursor: pointer;
  outline: none;
}

.kpi-title-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.kpi-title {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  color: #64748B;
}

.info-icon {
  width: 14px;
  height: 14px;
  color: #94A3B8;
  cursor: help;
}

.kpi-metric-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}

.kpi-number {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 800;
  color: #0B1F3B;
  line-height: 1;
  letter-spacing: -0.04em;
}

.kpi-delta {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: #2563EB;
}

.kpi-summary {
  font-size: 0.9375rem;
  color: #475569;
  margin-bottom: 24px;
}

/* SVG Chart Area */
.chart-area {
  position: relative;
  width: 100%;
  height: 180px;
  margin-bottom: 24px;
}

.chart-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.chart-point {
  transition: r 0.2s, fill 0.2s;
  cursor: pointer;
}

.chart-point:hover {
  r: 7;
  fill: #1D4ED8;
}

/* Chart Tooltip */
.chart-tooltip {
  position: absolute;
  padding: 4px 8px;
  background: #0B1F3B;
  color: #FFFFFF;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
  transform: translate(-50%, -120%);
}

/* Sub-card Inside Dashboard */
.presence-subcard {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.presence-subcard:hover {
  background: #EFF6FF;
  border-color: #BFDBFE;
  transform: translateY(-1px);
}

.presence-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.presence-icon-box {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: #DBEAFE;
  color: #2563EB;
  display: flex;
  align-items: center;
  justify-content: center;
}

.presence-info h4 {
  font-size: 0.9375rem;
  color: #0F172A;
  margin-bottom: 2px;
}

.presence-info p {
  font-size: 0.8125rem;
  color: #64748B;
}

.presence-arrow {
  color: #64748B;
  transition: transform 0.2s;
}

.presence-subcard:hover .presence-arrow {
  transform: translateX(4px);
  color: #2563EB;
}

/* ===================================================================
   ACTIVE PROJECT SPOTLIGHT: GEOCHECK (Section 7.2)
   =================================================================== */

.project-spotlight-section {
  padding: 80px 0;
}

.spotlight-card {
  background: linear-gradient(135deg, rgba(14, 26, 51, 0.85) 0%, rgba(7, 11, 20, 0.95) 100%);
  border: 1px solid var(--border-dark-strong);
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.spotlight-card::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.18) 0%, transparent 70%);
  pointer-events: none;
}

.spotlight-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.spotlight-info h3 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  color: var(--text-white);
  margin-top: 12px;
  margin-bottom: 16px;
}

.spotlight-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 24px 0 32px;
}

.spotlight-feat-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9375rem;
  color: var(--text-body);
}

.spotlight-feat-item svg {
  color: var(--color-blue-bright);
  flex-shrink: 0;
}

.spotlight-preview-box {
  background: rgba(7, 11, 20, 0.7);
  border: 1px solid var(--border-dark-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.signal-flow-wrap {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.flow-step {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 12px;
  background: rgba(229, 234, 242, 0.03);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(229, 234, 242, 0.06);
}

.flow-step-num {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--color-blue);
  background: rgba(59, 130, 246, 0.1);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.flow-step-text h5 {
  font-size: 0.875rem;
  color: var(--text-white);
  margin-bottom: 2px;
}

.flow-step-text p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ===================================================================
   PRODUCT FAMILY SYSTEM MAP (Section 7.3)
   =================================================================== */

.system-map-section {
  padding: 80px 0;
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.system-card {
  background: rgba(14, 26, 51, 0.5);
  border: 1px solid var(--border-dark-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-base);
}

.system-card:hover {
  background: rgba(20, 36, 68, 0.7);
  border-color: var(--border-dark-strong);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.system-card-top {
  margin-bottom: 24px;
}

.system-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.system-card-name {
  font-size: 1.25rem;
  color: var(--text-white);
}

.system-card-desc {
  font-size: 0.9375rem;
  color: var(--text-body);
  line-height: 1.5;
  margin-bottom: 16px;
}

.system-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.system-tag {
  font-family: var(--font-heading);
  font-size: 0.6875rem;
  color: var(--color-slate-muted);
  background: rgba(229, 234, 242, 0.05);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
}

/* ===================================================================
   RESEARCH LANE & LAB PRINCIPLES (Section 7.4 & 7.5)
   =================================================================== */

.research-section {
  padding: 80px 0;
}

.research-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.research-card {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-dark-subtle);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  transition: all var(--transition-base);
}

.research-card:hover {
  background: rgba(24, 38, 66, 0.8);
  border-color: var(--border-dark-strong);
  transform: translateY(-2px);
}

.research-card h3 {
  font-size: 1.35rem;
  color: var(--text-white);
  margin-top: 12px;
  margin-bottom: 12px;
}

.research-card p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.55;
  margin-bottom: 24px;
}

.principles-section {
  padding: 80px 0;
  border-top: 1px solid var(--border-dark-subtle);
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.principle-box {
  padding: 24px;
  background: rgba(229, 234, 242, 0.02);
  border-left: 2px solid var(--color-blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.principle-box h4 {
  font-size: 1.05rem;
  color: var(--text-white);
  margin-bottom: 8px;
}

.principle-box p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===================================================================
   GLOBAL FOOTER
   =================================================================== */

.site-footer {
  background: #04070D;
  border-top: 1px solid var(--border-dark-subtle);
  padding: 80px 0 40px;
  color: var(--color-slate-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  max-width: 320px;
  margin-top: 16px;
  line-height: 1.6;
}

.footer-motto {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--color-blue-bright);
  text-transform: uppercase;
  margin-top: 16px;
  font-weight: 700;
}

.footer-col-title {
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-white);
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: var(--color-slate-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(229, 234, 242, 0.06);
  padding-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
}

.footer-end-tag {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-slate-light);
  font-weight: 600;
}

/* ===================================================================
   TOAST NOTIFICATION
   =================================================================== */

.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  background: var(--color-navy);
  color: #FFFFFF;
  border: 1px solid var(--border-dark-strong);
  padding: 12px 20px;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-base);
  pointer-events: none;
}

.toast-container.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

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

@media (max-width: 1080px) and (min-width: 861px) {
  .mega-menu-wrapper {
    max-width: 820px;
    padding: 24px;
  }
  .mega-menu-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

@media (max-width: 1080px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .system-grid {
    grid-template-columns: 1fr;
  }
  .principles-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .nav-menu {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .header-inner {
    height: 64px;
  }
  .header-actions .btn-subtle {
    display: none; /* Hide external link on mobile header bar, accessible in drawer */
  }
  .header-actions .btn-primary {
    padding: 7px 14px;
    font-size: 0.8125rem;
  }
  .brand-name {
    font-size: 1.125rem;
  }
  .hero-headline {
    font-size: clamp(1.85rem, 6vw, 2.75rem);
    line-height: 1.2;
  }
  .hero-visual-card {
    min-height: 320px;
    padding: 20px;
  }
  .dashboard-card {
    padding: 24px 18px;
  }
  .spotlight-card {
    padding: 28px 20px;
  }
  .spotlight-grid {
    grid-template-columns: 1fr;
  }
  .research-grid {
    grid-template-columns: 1fr;
  }
  .principles-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  inset: 0;
  background: rgba(6, 11, 20, 0.98);
  backdrop-filter: blur(20px);
  z-index: 1000;
  padding: 80px 24px 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  overflow-y: auto;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.mobile-drawer.is-open {
  opacity: 1;
  pointer-events: auto;
}

.drawer-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  color: var(--text-white);
  cursor: pointer;
}