/*
  IoT Backbone Landing Page - Main Styles
  Modern Glassmorphism Theme
*/

/* ====== NAVIGATION ====== */
.glass-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-4) var(--spacing-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--foreground);
  text-decoration: none;
}

.logo-icon {
  font-size: 1.5rem;
}

.nav-links {
  display: flex;
  gap: var(--spacing-8);
}

.nav-links a {
  color: var(--color-muted-foreground);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
}

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

/* ====== HERO SECTION ====== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: var(--spacing-20) var(--spacing-6);
}

.hero-background {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}

.signal-wave {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 200vw;
  height: 200vw;
  transform: translate(-50%, -50%);
  background: conic-gradient(
    from 0deg,
    transparent 0deg,
    rgba(37, 99, 235, 0.1) 60deg,
    rgba(37, 99, 235, 0.2) 120deg,
    transparent 180deg
  );
  border-radius: 50%;
  animation: signal-rotate 20s linear infinite;
}

.signal-wave.delay-1 {
  animation-delay: -5s;
  opacity: 0.5;
  transform: translate(-50%, -50%) scale(1.2);
}

.signal-wave.delay-2 {
  animation-delay: -10s;
  opacity: 0.3;
  transform: translate(-50%, -50%) scale(1.4);
}

@keyframes signal-rotate {
  from {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 900px;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-6);
  animation: fade-in 0.8s ease forwards;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-muted-foreground);
  margin-bottom: var(--spacing-10);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  animation: slide-up 0.8s ease 0.2s forwards;
  opacity: 0;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-10);
  animation: slide-up 0.8s ease 0.4s forwards;
  opacity: 0;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-muted-foreground);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ====== CTA BUTTON ====== */
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-4) var(--spacing-8);
  background: var(--gradient-primary);
  color: white;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all var(--transition-normal);
  box-shadow: 0 0 30px rgba(37, 99, 235, 0.4);
  animation: slide-up 0.8s ease 0.6s forwards;
  opacity: 0;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(37, 99, 235, 0.5);
}

.cta-arrow {
  transition: transform var(--transition-fast);
}

.cta-button:hover .cta-arrow {
  transform: translateX(4px);
}

.cta-large {
  padding: var(--spacing-5) var(--spacing-10);
  font-size: var(--font-size-lg);
}

/* ====== DEMO GALLERY ====== */
.demo-gallery {
  padding: var(--spacing-20) 0;
  background: linear-gradient(180deg, transparent 0%, rgba(37, 99, 235, 0.03) 50%, transparent 100%);
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-6);
}

.demo-card {
  position: relative;
  display: block;
  padding: var(--spacing-6);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  text-decoration: none;
  transition: all var(--transition-normal);
  overflow: hidden;
}

.demo-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-glass);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.demo-card:hover {
  transform: translateY(-4px);
  border-color: rgba(37, 99, 235, 0.3);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(37, 99, 235, 0.1);
}

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

.demo-card > * {
  position: relative;
  z-index: 1;
}

.demo-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-4);
}

.demo-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--foreground);
  margin-bottom: var(--spacing-2);
}

.demo-description {
  font-size: var(--font-size-sm);
  color: var(--color-muted-foreground);
  margin-bottom: var(--spacing-4);
  line-height: var(--line-height-relaxed);
}

.demo-tags {
  display: flex;
  gap: var(--spacing-2);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-4);
}

.demo-status {
  position: absolute;
  top: var(--spacing-4);
  right: var(--spacing-4);
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-live {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* ====== FEATURES SECTION ====== */
.features {
  padding: var(--spacing-20) 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-6);
}

.feature-card {
  padding: var(--spacing-8);
  text-align: center;
  transition: all var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(37, 99, 235, 0.2);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-4);
}

.feature-card h3 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--foreground);
  margin-bottom: var(--spacing-3);
}

.feature-card p {
  font-size: var(--font-size-sm);
  color: var(--color-muted-foreground);
  line-height: var(--line-height-relaxed);
}

/* ====== TECHNOLOGY SECTION ====== */
.technology {
  padding: var(--spacing-20) 0;
  background: linear-gradient(180deg, transparent 0%, rgba(37, 99, 235, 0.02) 50%, transparent 100%);
}

.tech-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-8);
}

.tech-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-4) var(--spacing-6);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
}

.tech-item:hover {
  transform: translateY(-2px);
  border-color: rgba(37, 99, 235, 0.3);
}

.tech-logo {
  font-size: 1.5rem;
}

.tech-name {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--foreground);
}

/* ====== CTA SECTION ====== */
.cta-section {
  margin: var(--spacing-16) auto;
  max-width: 900px;
  padding: var(--spacing-16);
  text-align: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
}

.cta-content h2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--foreground);
  margin-bottom: var(--spacing-3);
}

.cta-content p {
  font-size: var(--font-size-lg);
  color: var(--color-muted-foreground);
  margin-bottom: var(--spacing-8);
}

/* ====== FOOTER ====== */
.footer {
  padding: var(--spacing-16) 0;
  background: rgba(0, 0, 0, 0.3);
  border-top: 1px solid var(--glass-border);
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-6);
}

.footer-content {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--foreground);
  margin-bottom: var(--spacing-2);
}

.footer-tagline {
  font-size: var(--font-size-sm);
  color: var(--color-muted-foreground);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-8);
}

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

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

.footer-copy {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-muted-foreground);
}

/* ====== RESPONSIVE ====== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero {
    padding: var(--spacing-16) var(--spacing-4);
  }
  
  .hero-stats {
    gap: var(--spacing-6);
  }
  
  .stat-number {
    font-size: var(--font-size-2xl);
  }
  
  .demo-grid {
    grid-template-columns: 1fr;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .tech-grid {
    gap: var(--spacing-4);
  }
  
  .footer-links {
    flex-wrap: wrap;
    gap: var(--spacing-4);
  }
}