:root {
  --bg-base: #040814;
  --bg-surface: rgba(15, 23, 42, 0.6);
  --bg-surface-hover: rgba(30, 41, 59, 0.8);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-primary: #00f2fe;
  --accent-secondary: #4facfe;
  --gradient-accent: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  --border-light: rgba(255, 255, 255, 0.05);
  --border-glow: rgba(0, 242, 254, 0.3);
  --shadow-glow: 0 0 20px rgba(0, 242, 254, 0.2);
  --blur-glass: blur(12px);
  --font-sans: 'Inter', sans-serif;
  --font-display: 'Outfit', sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
}

.text-gradient {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  margin-bottom: 1rem;
  display: inline-block;
  font-weight: 600;
}

/* Layout Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 8rem 0;
  position: relative;
}

/* Background Effects */
.bg-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,242,254,0.1) 0%, rgba(4,8,20,0) 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: -1;
  pointer-events: none;
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: 1.5rem 0;
  background: rgba(4, 8, 20, 0.8);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border-bottom: 1px solid var(--border-light);
  z-index: 100;
  transition: all 0.3s ease;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

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

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.3s ease;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 99px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #000;
  box-shadow: 0 4px 15px rgba(0, 242, 254, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 242, 254, 0.3);
}

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

.btn-secondary:hover {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.2);
}

/* Hero Section */
#hero {
  padding: 12rem 0 8rem;
  min-height: 100vh;
  display: flex;
  align-items: center;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-content h1 {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 4rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  border-top: 1px solid var(--border-light);
  padding-top: 3rem;
}

.stat-item h3 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.stat-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* About Section */
#about .about-content {
  max-width: 800px;
}

#about h2 {
  font-size: 3rem;
  margin-bottom: 2rem;
}

#about p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Capabilities Section */
#capabilities .section-header {
  margin-bottom: 4rem;
}

#capabilities h2 {
  font-size: 3rem;
  max-width: 600px;
}

.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  padding: 2.5rem;
  border-radius: 20px;
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.card:hover::before {
  transform: scaleX(1);
}

.card-index {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: rgba(255,255,255,0.05);
  position: absolute;
  top: 1rem;
  right: 1.5rem;
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  margin-top: 1rem;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Approach Section */
#approach {
  background: linear-gradient(to bottom, transparent, rgba(15,23,42,0.3));
}

#approach h2 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  max-width: 600px;
}

#approach .intro {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 4rem;
  max-width: 700px;
}

.approach-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 3rem;
}

.approach-item {
  display: flex;
  gap: 1.5rem;
}

.approach-item .index {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.approach-item h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.approach-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Contact Section */
#contact {
  text-align: center;
}

#contact h2 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
}

#contact p {
  color: var(--text-secondary);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto 4rem;
}

.contact-form {
  max-width: 600px;
  margin: 0 auto;
  text-align: left;
  background: var(--bg-surface);
  padding: 3rem;
  border-radius: 24px;
  border: 1px solid var(--border-light);
  backdrop-filter: var(--blur-glass);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 0.875rem 1rem;
  background: rgba(4, 8, 20, 0.5);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: all 0.3s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(0, 242, 254, 0.1);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

.contact-form .btn-primary {
  width: 100%;
  padding: 1rem;
  font-size: 1rem;
}

.form-status {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 8px;
  font-size: 0.95rem;
  text-align: center;
  display: none;
}

.form-status.success {
  display: block;
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.form-status.error {
  display: block;
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Footer */
footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border-light);
}

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

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.3s ease;
}

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

.copyright {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-content h1 { font-size: 2.5rem; }
  .stats-grid { grid-template-columns: 1fr; gap: 2rem; }
  .form-row { grid-template-columns: 1fr; }
  .nav-links { display: none; } /* Add mobile menu later if needed */
  #about h2, #capabilities h2, #approach h2, #contact h2 { font-size: 2rem; }
  .approach-list { grid-template-columns: 1fr; }
  .footer-content { flex-direction: column; gap: 1.5rem; text-align: center; }
}

/* Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-up {
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }