:root {
  --bg-primary: #0f172a; /* Slate 900 */
  --bg-secondary: rgba(30, 41, 59, 0.7); /* Slate 800 */
  --bg-tertiary: #020617; /* Slate 950 */
  --accent-primary: #3b82f6; /* Blue 500 */
  --accent-hover: #2563eb; /* Blue 600 */
  --accent-success: #10b981; /* Emerald 500 */
  --text-primary: #f8fafc; /* Slate 50 */
  --text-secondary: #94a3b8; /* Slate 400 */
  --text-tertiary: #64748b; /* Slate 500 */
  --border-color: rgba(148, 163, 184, 0.1);
  --glass-bg: rgba(15, 23, 42, 0.6);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 700;
}

h1 {
  font-size: 3.5rem;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, #fff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

p {
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: 2rem;
}

/* Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.text-center {
  text-align: center;
}

.highlight {
  color: var(--accent-primary);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: white;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
}

.btn-secondary {
  background-color: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background-color: var(--bg-secondary);
  border-color: var(--text-secondary);
}

/* Glass Panels */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-panel:hover {
  transform: translateY(-5px);
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

/* Header / Navbar */
header {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 20px 0;
  background: rgba(2, 6, 23, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

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

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

/* Hero Section */
.hero {
  padding: 160px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: var(--accent-primary);
  filter: blur(150px);
  opacity: 0.15;
  border-radius: 50%;
  z-index: -1;
}

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

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 32px;
}

/* Features Grid */
.features {
  padding: 100px 0;
  background-color: var(--bg-primary);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  margin-top: 64px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 32px;
  margin-top: 48px;
}

.feature-icon {
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent-primary);
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  margin-bottom: 24px;
}

/* Pricing Section */
.pricing {
  padding: 100px 0;
}

.pricing-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 24px 0;
}

.pricing-price span {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
  flex: 1;
}

.pricing-features li {
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
}

.pricing-features li i {
  color: var(--accent-success);
}

/* Popular Badge */
.popular-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--accent-primary);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.card-popular {
  border-color: rgba(59, 130, 246, 0.5);
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.15);
  position: relative;
}

/* CTA Section */
.cta-section {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--bg-primary) 100%);
  text-align: center;
}

.cta-box {
  background: linear-gradient(45deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.9));
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 24px;
  padding: 64px 32px;
  position: relative;
  overflow: hidden;
}

.cta-box::after {
  content: '';
  position: absolute;
  bottom: -50px;
  right: -50px;
  width: 200px;
  height: 200px;
  background: var(--accent-primary);
  filter: blur(80px);
  opacity: 0.2;
}

/* Footer */
footer {
  background: var(--bg-tertiary);
  padding: 64px 0 32px;
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin-bottom: 64px;
}

.footer-col h4 {
  margin-bottom: 24px;
  font-size: 1.125rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 12px;
}

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

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

.footer-bottom {
  text-align: center;
  color: var(--text-tertiary);
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

/* Responsive */
@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  
  .nav-links {
    display: none;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .hero-buttons .btn {
    width: 100%;
  }
}