/* ===================================
   Envy of the Birds - Custom Theme
   Modern R&D Company Design
   =================================== */

:root {
  /* Colors - Dark tech aesthetic */
  --color-bg: #0a0a0f;
  --color-bg-elevated: #12121a;
  --color-bg-card: #1a1a24;
  --color-text: #e4e4e7;
  --color-text-muted: #a1a1aa;
  --color-text-dim: #71717a;
  --color-accent: #3b82f6;
  --color-accent-hover: #60a5fa;
  --color-accent-glow: rgba(59, 130, 246, 0.3);
  --color-secondary: #06b6d4;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.15);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Spacing */
  --section-padding: clamp(4rem, 10vw, 8rem);
  --container-width: 1200px;
  --container-padding: clamp(1.5rem, 5vw, 3rem);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* Container */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Section Title */
.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 3rem;
  text-align: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: 8px;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
  box-shadow: 0 0 20px var(--color-accent-glow);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 30px var(--color-accent-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-icon {
  width: 1rem;
  height: 1rem;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.hero-video {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero-video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 10, 15, 0.7) 0%,
    rgba(10, 10, 15, 0.8) 50%,
    rgba(10, 10, 15, 0.95) 100%
  );
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.5rem 0;
  background: linear-gradient(180deg, rgba(10, 10, 15, 0.9) 0%, transparent 100%);
  backdrop-filter: blur(10px);
}

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

.nav-logo img {
  height: 40px;
  width: auto;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

/* Hero Content */
.hero-content {
  text-align: center;
  max-width: 800px;
  padding: 0 var(--container-padding);
}

.hero-title {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-indicator span {
  display: block;
  width: 24px;
  height: 40px;
  border: 2px solid var(--color-border);
  border-radius: 12px;
  position: relative;
}

.scroll-indicator span::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 2px;
  animation: scroll 2s infinite;
}

@keyframes scroll {
  0%, 100% { opacity: 1; transform: translateX(-50%) translateY(0); }
  50% { opacity: 0.3; transform: translateX(-50%) translateY(10px); }
}

/* ===================================
   About Section
   =================================== */
.about {
  padding: var(--section-padding) 0;
  background: var(--color-bg);
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-content p {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.about-content p:last-child {
  margin-bottom: 0;
}

/* ===================================
   Capabilities Section
   =================================== */
.capabilities {
  padding: var(--section-padding) 0;
  background: var(--color-bg-elevated);
}

.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.capability-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 2rem;
  transition: all var(--transition-base);
}

.capability-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.capability-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1.5rem;
  color: var(--color-accent);
}

.capability-icon svg {
  width: 100%;
  height: 100%;
}

.capability-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.capability-description {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===================================
   Proof of Concept Section
   =================================== */
.proof {
  padding: var(--section-padding) 0;
  background: var(--color-bg);
  overflow: hidden;
}

.proof-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.proof-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.proof-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.proof-description {
  margin-bottom: 2rem;
}

.proof-description p {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 1rem;
}

/* Drone Swarm Animation */
.proof-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 400px;
}

.drone-swarm {
  position: relative;
  width: 300px;
  height: 300px;
}

.drone {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 
    0 0 20px var(--color-accent-glow),
    0 0 40px var(--color-accent-glow);
  animation: float 3s ease-in-out infinite;
}

.drone::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 4px;
  height: 4px;
  background: white;
  border-radius: 50%;
}

.d1 { top: 50%; left: 50%; animation-delay: 0s; }
.d2 { top: 30%; left: 30%; animation-delay: 0.2s; }
.d3 { top: 30%; left: 70%; animation-delay: 0.4s; }
.d4 { top: 70%; left: 30%; animation-delay: 0.6s; }
.d5 { top: 70%; left: 70%; animation-delay: 0.8s; }
.d6 { top: 20%; left: 50%; animation-delay: 1s; }
.d7 { top: 80%; left: 50%; animation-delay: 1.2s; }
.d8 { top: 50%; left: 20%; animation-delay: 1.4s; }
.d9 { top: 50%; left: 80%; animation-delay: 1.6s; }

@keyframes float {
  0%, 100% {
    transform: translate(0, 0) scale(1);
    opacity: 1;
  }
  50% {
    transform: translate(10px, -15px) scale(1.1);
    opacity: 0.8;
  }
}

/* ===================================
   Contact Section
   =================================== */
.contact {
  padding: var(--section-padding) 0;
  background: var(--color-bg-elevated);
  text-align: center;
}

.contact-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 500px;
  margin: 0 auto 2rem;
}

.contact-email {
  display: inline-block;
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--color-accent);
  padding: 1rem 2rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition: all var(--transition-base);
}

.contact-email:hover {
  border-color: var(--color-accent);
  background: rgba(59, 130, 246, 0.1);
  transform: translateY(-2px);
}

/* ===================================
   Footer
   =================================== */
.footer {
  padding: 3rem 0 2rem;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.footer-name {
  font-size: 1.125rem;
  font-weight: 600;
  display: block;
  margin-bottom: 0.25rem;
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--color-text-dim);
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition: all var(--transition-base);
}

.social-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.social-link svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  font-size: 0.875rem;
  color: var(--color-text-dim);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 968px) {
  .proof-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .proof-visual {
    order: -1;
    min-height: 250px;
  }
  
  .drone-swarm {
    width: 200px;
    height: 200px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .capabilities-grid {
    grid-template-columns: 1fr;
  }
  
  .capability-card {
    padding: 1.5rem;
  }
}