/* Global Variables */
:root {
  --bg: #080808;
  --fg: #e0e0e0;
  --accent: #76B900;
  --card-bg: rgba(255,255,255,0.03);
  --transition: 0.3s ease;
}
[data-theme="light"] {
  --bg: #f0f4f8;
  --fg: #333;
  --card-bg: rgba(0,0,0,0.03);
}

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

html {
  scroll-behavior: smooth;
  background: var(--bg);
  color: var(--fg);
}

body {
  font-family: 'Poppins', sans-serif;
  line-height: 1.6;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #000;
  color: #fff;
  padding: 8px;
  transition: top var(--transition);
}
.skip-link:focus {
  top: 0;
}

/* Header & Navigation */
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  background: #1a1a1a;
  position: sticky;
  top: 0;
  z-index: 1000;
}
.nav-links {
  display: flex;
  gap: 1rem;
}
.nav-links a {
  color: #fff;
  text-decoration: none;
  transition: color var(--transition);
}
.nav-links a:hover {
  color: var(--accent);
}
#mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
}

/* Theme Toggle */
#theme-toggle {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 6rem 1rem;
  background: 
    linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)),
    url('https://source.unsplash.com/1600x900/?ai') center/cover no-repeat;
  color: #fff;
}

.hero h1 {
  font-size: 3em;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.2em;
  max-width: 600px;
  margin: 0 auto 20px;
}

.cta-button {
  margin-top: 1rem;
  padding: 0.75rem 2rem;
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 4px;
  text-decoration: none;
  transition: background var(--transition);
}
.cta-button:hover {
  background: #5f9a00;
}

/* Base Section Styling */
.section {
  padding: 4rem 1rem;
  max-width: 1200px;
  margin: auto;
}
.section h2 {
  text-align: center;
  font-size: 2.5em;
  margin-bottom: 40px;
  color: var(--accent);
}
.section--centered {
  text-align: center;
}

/* Use Cases Section */
#use-cases h2 {
  text-align: center;
  margin-bottom: 40px;
}

.use-cases {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}

/* Cards (Use Cases & Features) */
.cards, .use-cases {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}
.card {
  background: var(--card-bg);
  border: 1px solid rgba(255,255,255,0.1);
  backdrop-filter: blur(8px);
  border-radius: 12px;
  padding: 30px;
  width: 300px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 12px 24px rgba(0,0,0,0.4);
}
.card h3 {
  color: #fff;
  margin-bottom: 15px;
}

/* Exploding Image Section */
#explosion-section {
  text-align: center;
  margin: 40px auto;
}

.explosion-img {
  width: 300px;
  animation: explode 2s ease-out forwards;
  margin: auto;
}

@keyframes explode {
  0% {
    transform: scale(0.5);
    opacity: 1;
  }
  50% {
    transform: scale(1.5);
    opacity: 1;
  }
  100% {
    transform: scale(3);
    opacity: 0;
  }
}

/* Video Section */
.explosion-video {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.6);
  display: block;
  margin: auto;
}

/* Testimonials */
.section--testimonials {
  background: #0b0b0b;
}
.testimonials {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}
.testimonial {
  background: rgba(255,255,255,0.05);
  border-radius: 8px;
  padding: 25px;
  max-width: 350px;
  color: #e0e0e0;
  font-style: italic;
}
.testimonial span {
  display: block;
  text-align: right;
  margin-top: 15px;
  font-weight: bold;
  color: var(--accent);
}

/* Contact Form Section */
#contact-form {
  margin: 40px 0;
  text-align: center;
}
#contact-form form {
  display: grid;
  gap: 1rem;
  max-width: 400px;
  margin: auto;
}
#contact-form input,
#contact-form textarea {
  padding: 0.75rem;
  border: 1px solid #444;
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
  transition: border var(--transition), box-shadow var(--transition);
}
#contact-form input:focus,
#contact-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 8px rgba(118,185,0,0.5);
}
#contact-form button {
  padding: 0.75rem;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background var(--transition);
}
#contact-form button:hover {
  background: #5f9a00;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem 1rem;
  background: #1a1a1a;
  color: #fff;
}

/* Footer Social Links */
footer div a {
  color: #e74c3c;
  text-decoration: none;
  margin: 0 10px;
}

/* Responsive Styles */
@media (max-width: 768px) {
  #mobile-menu-toggle {
    display: block;
  }
  
  .nav-links {
    display: none;
    flex-direction: column;
    background: #1a1a1a;
    position: absolute;
    top: 60px;
    right: 0;
    width: 200px;
  }
  .nav-links.open {
    display: flex;
  }
  
  .use-cases {
    flex-direction: column;
    align-items: center;
  }
  
  .hero h1 {
    font-size: 2.5em;
  }
  
  .hero p {
    font-size: 1em;
  }
}