:root {
  --bg-primary: #030712;
  --bg-secondary: #0b1120;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --border-subtle: rgba(56, 189, 248, 0.15);
  --border-active: rgba(56, 189, 248, 0.4);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent-cyan: #38bdf8;
  --accent-blue: #2563eb;
  --accent-emerald: #10b981;
  --accent-amber: #fbbf24;
  --accent-rose: #f43f5e;
  --accent-purple: #a855f7;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, monospace;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
}

body {
  overflow-x: hidden;
  line-height: 1.6;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 85% 30%, rgba(56, 189, 248, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 15% 70%, rgba(16, 185, 129, 0.05) 0%, transparent 40%);
  background-attachment: fixed;
}

/* Typography Helpers */
.gradient-text {
  background: linear-gradient(135deg, #38bdf8 0%, #60a5fa 50%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-text-emerald {
  background: linear-gradient(135deg, #34d399 0%, #10b981 50%, #059669 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Glassmorphism Navigation */
.nav-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(3, 7, 18, 0.8);
  border-bottom: 1px solid var(--border-subtle);
  transition: all 0.3s ease;
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-main);
}

.logo-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #0284c7, #2563eb);
  border-radius: 8px;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.4);
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo-sub {
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--accent-cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, #0284c7, #2563eb);
  color: #fff;
  padding: 0.65rem 1.4rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.35);
  transition: all 0.25s ease;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(37, 99, 235, 0.5);
  background: linear-gradient(135deg, #0369a1, #1d4ed8);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(15, 23, 42, 0.6);
  color: var(--text-main);
  padding: 0.65rem 1.4rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border: 1px solid var(--border-subtle);
  transition: all 0.25s ease;
  cursor: pointer;
}

.btn-secondary:hover {
  background: rgba(30, 41, 59, 0.8);
  border-color: var(--border-active);
  transform: translateY(-2px);
}

/* Hero Section */
.hero-section {
  position: relative;
  min-height: 100vh;
  padding-top: 7rem;
  padding-bottom: 4rem;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-grid {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.35rem 1rem;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 9999px;
  font-size: 0.85rem;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 1.5rem;
  animation: pulse-border 3s infinite;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-cyan);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 2.5rem;
  max-width: 620px;
}

.hero-cta-group {
  display: flex;
  gap: 1rem;
  margin-bottom: 3.5rem;
  flex-wrap: wrap;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.metric-item .metric-val {
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
  font-family: var(--font-mono);
}

.metric-item .metric-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 0.2rem;
}

/* 3D Visualizer Canvas & Card */
.visualizer-container {
  position: relative;
  background: radial-gradient(circle at center, rgba(15, 23, 42, 0.8) 0%, rgba(3, 7, 18, 0.95) 100%);
  border: 1px solid var(--border-active);
  border-radius: 20px;
  padding: 1.5rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8), 0 0 40px rgba(56, 189, 248, 0.15);
  overflow: hidden;
}

.visualizer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.vis-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.vis-live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulse-live 1.5s infinite;
}

.canvas-wrapper {
  position: relative;
  width: 100%;
  height: 380px;
  border-radius: 12px;
  background: #020617;
  overflow: hidden;
}

#orbitalCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.visualizer-hud {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-top: 1rem;
}

.hud-node-card {
  background: rgba(2, 6, 23, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  font-size: 0.75rem;
}

.hud-node-name {
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.2rem;
}

.badge-sun {
  color: var(--accent-amber);
  background: rgba(251, 191, 36, 0.15);
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
  display: inline-block;
  font-size: 0.7rem;
}

.badge-eclipse {
  color: var(--accent-rose);
  background: rgba(244, 63, 94, 0.15);
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
  display: inline-block;
  font-size: 0.7rem;
}

.badge-workload {
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.15);
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
  display: inline-block;
  font-size: 0.7rem;
}

/* Problem vs Solution Section */
.section {
  padding: 6rem 2rem;
  max-width: 1280px;
  margin: 0 auto;
}

.section-tag {
  text-transform: uppercase;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--accent-cyan);
  text-align: center;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -1px;
  text-align: center;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  text-align: center;
  max-width: 720px;
  margin: 0 auto 4rem auto;
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.compare-card {
  border-radius: 16px;
  padding: 2.5rem;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.compare-card.problem {
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.compare-card.problem::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, #f43f5e, #fb7185);
}

.compare-card.solution {
  border: 1px solid rgba(16, 185, 129, 0.4);
  box-shadow: 0 0 35px rgba(16, 185, 129, 0.1);
}

.compare-card.solution::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, #10b981, #38bdf8);
}

.compare-heading {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.compare-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.compare-list li {
  display: flex;
  gap: 0.85rem;
  font-size: 0.95rem;
  color: #cbd5e1;
}

.icon-cross {
  color: var(--accent-rose);
  font-weight: bold;
  flex-shrink: 0;
}

.icon-check {
  color: var(--accent-emerald);
  font-weight: bold;
  flex-shrink: 0;
}

/* Interactive Eclipse Simulator */
.sim-container {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.sim-controls-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(2, 6, 23, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 1rem 1.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.sim-btn-trigger {
  background: linear-gradient(135deg, #f43f5e, #be123c);
  color: #fff;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(244, 63, 94, 0.4);
  transition: all 0.25s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sim-btn-trigger:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(244, 63, 94, 0.6);
}

.sim-btn-reset {
  background: rgba(255, 255, 255, 0.08);
  color: #cbd5e1;
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
}

.sim-btn-reset:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.sim-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  position: relative;
  margin-bottom: 2.5rem;
}

.sim-step-card {
  background: rgba(2, 6, 23, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 1.25rem;
  transition: all 0.3s ease;
  position: relative;
}

.sim-step-card.active {
  border-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.2);
  transform: translateY(-3px);
}

.sim-step-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
}

.sim-step-title {
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
  margin-bottom: 0.4rem;
}

.sim-step-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.sim-log-terminal {
  background: #020617;
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: 12px;
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  max-height: 200px;
  overflow-y: auto;
  color: #38bdf8;
}

.log-entry {
  margin-bottom: 0.3rem;
  line-height: 1.5;
}

.log-entry .time {
  color: #64748b;
  margin-right: 0.5rem;
}

.log-entry .warn {
  color: var(--accent-rose);
}

.log-entry .success {
  color: var(--accent-emerald);
}

/* Deep Tech & Architecture Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 2rem;
  transition: all 0.3s ease;
  backdrop-filter: blur(8px);
}

.feature-box:hover {
  transform: translateY(-4px);
  border-color: var(--border-active);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.feature-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 1.25rem;
}

.feature-heading {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: #fff;
}

.feature-body {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
}


/* Mission Scenarios */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.scenario-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-purple);
  margin-bottom: 0.5rem;
}

.scenario-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1rem;
}

.scenario-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

.scenario-impact {
  padding: 0.75rem;
  background: rgba(2, 6, 23, 0.6);
  border-left: 3px solid var(--accent-cyan);
  border-radius: 4px;
  font-size: 0.85rem;
  color: #e2e8f0;
}

/* Call to Action */
.cta-box {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.2) 0%, rgba(37, 99, 235, 0.2) 50%, rgba(168, 85, 247, 0.2) 100%);
  border: 1px solid var(--border-active);
  border-radius: 24px;
  padding: 4.5rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 60px rgba(56, 189, 248, 0.15);
}

.cta-box h2 {
  font-size: 2.75rem;
  font-weight: 900;
  margin-bottom: 1rem;
  letter-spacing: -1px;
}

.cta-box p {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto 2.5rem auto;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-subtle);
  background: rgba(2, 6, 23, 0.8);
  padding: 4rem 2rem 2rem 2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-col a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Animations */
@keyframes pulse-live {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.9); }
}

@keyframes pulse-border {
  0%, 100% { border-color: rgba(56, 189, 248, 0.3); }
  50% { border-color: rgba(56, 189, 248, 0.7); }
}

/* Mobile Responsiveness */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .compare-grid,
  .features-grid,
  .scenario-grid,
  .sim-timeline,
  .footer-inner {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.75rem;
  }
  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
  }
}