/* ================================
   Metahub - AI Agent Observability
   Design System & Styles
   ================================ */

/* CSS Custom Properties */
:root {
  /* Colors */
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #111118;
  --color-bg-card: rgba(255, 255, 255, 0.03);
  --color-bg-card-hover: rgba(255, 255, 255, 0.06);

  --color-text-primary: #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.7);
  --color-text-muted: rgba(255, 255, 255, 0.5);

  --color-purple: #8B5CF6;
  --color-pink: #EC4899;
  --color-purple-glow: rgba(139, 92, 246, 0.3);
  --color-pink-glow: rgba(236, 72, 153, 0.2);

  --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%);
  --gradient-text: linear-gradient(135deg, #A855F7 0%, #EC4899 100%);
  --gradient-glow: radial-gradient(ellipse at center, rgba(139, 92, 246, 0.15) 0%, transparent 70%);

  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-light: rgba(255, 255, 255, 0.05);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Shadows */
  --shadow-glow: 0 0 60px rgba(139, 92, 246, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul {
  list-style: none;
}

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

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: 1.25rem;
}

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

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Background Effects */
.bg-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: var(--gradient-glow);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.bg-grid {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 50px 50px;
}

/* ================================
   Header / Navigation
   ================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-sm) 0;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-light);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
}

.logo:hover {
  opacity: 0.9;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.625rem 1.25rem;
  font-family: var(--font-family);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

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

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

.btn-white {
  background: white;
  color: #0a0a0f;
}

.btn-white:hover {
  background: rgba(255, 255, 255, 0.9);
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

.btn svg {
  width: 18px;
  height: 18px;
}

/* ================================
   Hero Section
   ================================ */
.hero {
  position: relative;
  padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-2xl);
  text-align: center;
  overflow: hidden;
}

.hero .bg-glow {
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
}

.hero-content {
  position: relative;
  z-index: 1;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.5rem 1rem;
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--color-purple);
  margin-bottom: var(--spacing-lg);
}

.badge::before {
  content: '✦';
}

.hero h1 {
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
  font-size: 1.125rem;
  color: var(--color-text-secondary);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-2xl);
}

/* Stats */
.stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stats-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}

/* Terminal Mockup */
.terminal {
  max-width: 700px;
  margin: var(--spacing-2xl) auto 0;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-glow);
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--color-border-light);
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot.red {
  background: #ff5f56;
}

.terminal-dot.yellow {
  background: #ffbd2e;
}

.terminal-dot.green {
  background: #27c93f;
}

.terminal-title {
  flex: 1;
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.terminal-body {
  padding: var(--spacing-md);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
  overflow-x: auto;
}

.terminal-body pre {
  white-space: pre;
}

/* ================================
   Integrations Section
   ================================ */
.integrations {
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.integrations-title {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
}

.integrations-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.integration-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.integration-badge svg {
  width: 16px;
  height: 16px;
}

/* ================================
   Features Section
   ================================ */
.features {
  position: relative;
  padding: var(--spacing-3xl) 0;
}

.section-badge {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-purple);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-md);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-2xl);
}

.section-header h2 {
  margin-bottom: var(--spacing-sm);
}

.section-header p {
  color: var(--color-text-secondary);
  font-size: 1.125rem;
}

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

.feature-card {
  padding: var(--spacing-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.feature-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border);
  transform: translateY(-2px);
}

.feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(139, 92, 246, 0.15);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
  color: var(--color-purple);
  font-size: 1.25rem;
}

.feature-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-xs);
}

.feature-title h3 {
  font-size: 1.1rem;
}

.new-badge {
  padding: 0.125rem 0.5rem;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.feature-code {
  margin-top: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ================================
   How It Works Section
   ================================ */
.how-it-works {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(180deg, transparent 0%, rgba(139, 92, 246, 0.03) 50%, transparent 100%);
}

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

.step {
  text-align: center;
  padding: var(--spacing-lg);
}

.step-number {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
  background: var(--gradient-primary);
  border-radius: 50%;
  font-size: 1.25rem;
  font-weight: 700;
}

.step h3 {
  margin-bottom: var(--spacing-xs);
}

.step p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
}

.step-code {
  padding: var(--spacing-sm);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-purple);
}

/* ================================
   Security Section
   ================================ */
.security {
  position: relative;
  padding: var(--spacing-3xl) 0;
  overflow: hidden;
}

.security-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.security-text h2 {
  margin-bottom: var(--spacing-md);
}

.security-text p {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-lg);
}

.security-terminal {
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
}

.security-terminal .critical {
  color: #ef4444;
}

.security-terminal .medium {
  color: #f59e0b;
}

.security-terminal .success {
  color: #22c55e;
}

/* ================================
   CTA Section
   ================================ */
.cta {
  padding: var(--spacing-3xl) 0;
}

.cta-box {
  padding: var(--spacing-2xl) var(--spacing-lg);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(236, 72, 153, 0.05) 100%);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: var(--radius-xl);
  text-align: center;
}

.cta-box h2 {
  margin-bottom: var(--spacing-sm);
}

.cta-box p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* ================================
   Footer
   ================================ */
.footer {
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand .logo {
  margin-bottom: var(--spacing-sm);
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer-column h4 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.footer-column ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-column a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
}

.footer-bottom p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.footer-social a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

/* ================================
   Responsive Design
   ================================ */
@media (max-width: 968px) {
  .nav-links {
    display: none;
  }

  .security-content {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
  }
}

@media (max-width: 640px) {
  .hero-actions {
    flex-direction: column;
  }

  .stats {
    gap: var(--spacing-md);
  }

  .stats-divider {
    display: none;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }
}