/* ===================================
   MindMesh Premium Design System
   Deep Agents in Deep Verticals
   =================================== */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=IBM+Plex+Sans:wght@300;400;500;600&display=swap');

/* ===================================
   CSS Custom Properties
   =================================== */
:root {
  /* Colors - Premium Palette */
  --color-charcoal-dark: #1a1a1a;
  --color-charcoal: #2d2d2d;
  --color-charcoal-light: #3a3a3a;
  --color-neutral-dark: #4a4a4a;
  --color-neutral: #6b6b6b;
  --color-neutral-light: #e8e8e8;
  --color-neutral-lightest: #f5f5f5;
  --color-white: #ffffff;

  /* Accent Colors */
  --color-accent-teal: #00d9ff;
  --color-accent-teal-dark: #00b8d4;
  --color-accent-teal-light: #33e1ff;

  /* Background Colors */
  --color-bg-primary: #0f0f0f;
  --color-bg-secondary: var(--color-charcoal-dark);
  --color-bg-tertiary: var(--color-charcoal);
  --color-bg-light: var(--color-neutral-lightest);

  /* Text Colors */
  --color-text-primary: var(--color-white);
  --color-text-secondary: var(--color-neutral-light);
  --color-text-tertiary: var(--color-neutral);
  --color-text-dark: var(--color-neutral-dark);

  /* Subtle Effects */
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: 8px;

  /* Spacing - 8px Grid System */
  --spacing-1: 8px;
  --spacing-2: 16px;
  --spacing-3: 24px;
  --spacing-4: 32px;
  --spacing-5: 40px;
  --spacing-6: 48px;
  --spacing-8: 64px;
  --spacing-10: 80px;
  --spacing-12: 96px;
  --spacing-16: 128px;

  /* Typography */
  --font-family-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-family-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 30px;
  --font-size-4xl: 36px;
  --font-size-5xl: 48px;
  --font-size-6xl: 64px;

  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows - Subtle */
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px 0 rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 10px 20px 0 rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 40px 0 rgba(0, 0, 0, 0.2);
  --shadow-accent: 0 4px 16px 0 rgba(0, 217, 255, 0.2);
}

/* ===================================
   Reset & Base Styles
   =================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family-body);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   Typography
   =================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-3);
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--font-size-6xl);
  font-weight: var(--font-weight-extrabold);
}

h2 {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
}

h3 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-semibold);
}

h4 {
  font-size: var(--font-size-3xl);
}

h5 {
  font-size: var(--font-size-2xl);
}

h6 {
  font-size: var(--font-size-xl);
}

p {
  margin-bottom: var(--spacing-3);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

a {
  color: var(--color-accent-teal);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--color-accent-teal-light);
}

/* ===================================
   Utility Classes
   =================================== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.container-wide {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--spacing-6);
}

.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
}

.accent-text {
  color: var(--color-accent-teal);
}

.section {
  padding: var(--spacing-16) 0;
  position: relative;
}

.section-sm {
  padding: var(--spacing-10) 0;
}

.section-lg {
  padding: var(--spacing-20) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

.section-subtitle {
  text-align: center;
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto var(--spacing-8);
  line-height: var(--line-height-relaxed);
}

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Asymmetrical utility */
.asymmetric-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--spacing-6);
  align-items: center;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-3) 0;
  transition: all var(--transition-base);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(15, 15, 15, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
}

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

.logo {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: color var(--transition-base);
  letter-spacing: -0.02em;
}

.logo:hover {
  color: var(--color-accent-teal);
}

.nav-links {
  display: flex;
  gap: var(--spacing-6);
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  font-family: var(--font-family-heading);
  position: relative;
  transition: color var(--transition-base);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent-teal);
  transition: width var(--transition-base);
}

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

.nav-links a:hover::after {
  width: 100%;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: var(--font-size-2xl);
  cursor: pointer;
  padding: var(--spacing-1);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--spacing-10);
  background: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-charcoal-dark) 100%);
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0.4;
  background-image:
    radial-gradient(circle at 15% 30%, rgba(0, 217, 255, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 70%, rgba(0, 217, 255, 0.05) 0%, transparent 40%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 1000px;
  padding: 0 var(--spacing-4);
}

.hero-tagline {
  font-size: var(--font-size-sm);
  color: var(--color-accent-teal);
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-family-heading);
  margin-bottom: var(--spacing-3);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  animation: fadeInUp 0.6s ease-out;
}

.hero-title {
  font-size: var(--font-size-6xl);
  margin-bottom: var(--spacing-4);
  animation: fadeInUp 0.6s ease-out 0.1s backwards;
  color: var(--color-text-primary);
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-accent-teal) 0%, var(--color-text-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-6);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  line-height: var(--line-height-relaxed);
  animation: fadeInUp 0.6s ease-out 0.2s backwards;
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-3);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease-out 0.3s backwards;
}

/* ===================================
   Buttons
   =================================== */
.btn {
  padding: var(--spacing-3) var(--spacing-5);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-family-heading);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  border: none;
  display: inline-block;
  text-align: center;
}

.btn-primary {
  background: var(--color-accent-teal);
  color: var(--color-charcoal-dark);
  box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
  background: var(--color-accent-teal-light);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px 0 rgba(0, 217, 255, 0.3);
}

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

.btn-secondary:hover {
  background: var(--glass-bg);
  border-color: var(--color-accent-teal);
  transform: translateY(-1px);
}

/* ===================================
   What Are Deep Agents Section
   =================================== */
.deep-agents {
  background: var(--color-bg-secondary);
}

.deep-agents-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.deep-agents-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-4);
  margin-top: var(--spacing-8);
}

.deep-agent-feature {
  padding: var(--spacing-5);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.deep-agent-feature:hover {
  border-color: var(--color-accent-teal);
  transform: translateY(-2px);
}

.deep-agent-icon {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-3);
}

.deep-agent-feature h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-2);
  color: var(--color-text-primary);
}

.deep-agent-feature p {
  font-size: var(--font-size-base);
  color: var(--color-text-tertiary);
  margin-bottom: 0;
  line-height: var(--line-height-relaxed);
}

/* ===================================
   Sectors Section
   =================================== */
.sectors {
  background: var(--color-bg-primary);
}

.sectors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-6);
  margin-top: var(--spacing-8);
}

.sector-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background: var(--color-bg-tertiary);
  transition: all var(--transition-base);
  cursor: pointer;
}

.sector-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 217, 255, 0.1) 0%, rgba(0, 217, 255, 0.05) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: 0;
}

.sector-card:hover::before {
  opacity: 1;
}

.sector-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 40px rgba(0, 217, 255, 0.2);
}

.sector-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  display: block;
}

.sector-content {
  padding: var(--spacing-4);
  position: relative;
  z-index: 1;
}

.sector-content h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-2);
}

.sector-content p {
  color: var(--color-text-tertiary);
  margin-bottom: 0;
}

/* ===================================
   Technical Architecture Section
   =================================== */
.architecture {
  background: var(--color-bg-secondary);
}

.architecture-diagram {
  margin-top: var(--spacing-8);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-8);
}

.architecture-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-4);
  position: relative;
}

.architecture-step {
  background: var(--color-bg-primary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-4);
  text-align: center;
  position: relative;
}

.architecture-step::after {
  content: '→';
  position: absolute;
  right: calc(-1 * var(--spacing-4));
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-accent-teal);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
}

.architecture-step:last-child::after {
  display: none;
}

.architecture-step-icon {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-2);
}

.architecture-step h4 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-2);
  color: var(--color-text-primary);
}

.architecture-step p {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  margin-bottom: 0;
}

/* ===================================
   Why Choose Us Section
   =================================== */
.why-choose {
  background: var(--color-bg-primary);
}

.value-props {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-6);
  margin-top: var(--spacing-8);
}

.value-prop {
  padding: var(--spacing-6);
  background: var(--color-bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.value-prop:hover {
  border-color: var(--color-accent-teal);
  transform: translateY(-2px);
}

.value-prop-icon {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-3);
}

.value-prop h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-2);
  color: var(--color-text-primary);
}

.value-prop p {
  color: var(--color-text-tertiary);
  margin-bottom: 0;
  line-height: var(--line-height-relaxed);
}

/* ===================================
   Case Studies Section
   =================================== */
.case-studies {
  background: var(--color-bg-secondary);
}

.case-studies-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-8);
  margin-top: var(--spacing-8);
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.case-study-card {
  padding: var(--spacing-6);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.case-study-card:hover {
  border-color: var(--color-accent-teal);
  transform: translateY(-2px);
}

.client-logo {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-extrabold);
  font-family: var(--font-family-heading);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-3);
  letter-spacing: -0.02em;
}

.client-description {
  color: var(--color-text-tertiary);
  margin-bottom: 0;
  line-height: var(--line-height-relaxed);
}

/* ===================================
   Pricing Section
   =================================== */
.pricing {
  background: var(--color-bg-primary);
}

.pricing-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  padding: var(--spacing-6) 0;
}

.pricing-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-6);
  line-height: var(--line-height-relaxed);
}

.pricing-cta-wrapper {
  display: flex;
  justify-content: center;
}

/* ===================================
   Contact/CTA Section
   =================================== */
.contact {
  background: var(--color-bg-secondary);
  text-align: center;
}

.contact-content {
  max-width: 700px;
  margin: 0 auto;
}

.contact h2 {
  margin-bottom: var(--spacing-4);
}

.contact p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-6);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  align-items: center;
  margin-top: var(--spacing-6);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
}

/* ===================================
   Footer
   =================================== */
.footer {
  background: var(--color-bg-primary);
  border-top: 1px solid var(--glass-border);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-8);
  padding: var(--spacing-10) 0 var(--spacing-6) 0;
}

.footer-brand h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-2);
  color: var(--color-text-primary);
}

.footer-brand p {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-3);
}

.trust-badges {
  display: flex;
  gap: var(--spacing-2);
  flex-wrap: wrap;
}

.trust-badge {
  font-size: var(--font-size-xs);
  padding: var(--spacing-1) var(--spacing-2);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-tertiary);
  font-weight: var(--font-weight-medium);
}

.footer-section h4 {
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-3);
  color: var(--color-text-primary);
}

.footer-links {
  list-style: none;
  padding: 0;
}

.footer-links li {
  margin-bottom: var(--spacing-2);
}

.footer-links a {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
  transition: color var(--transition-base);
}

.footer-links a:hover {
  color: var(--color-accent-teal);
}

.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding: var(--spacing-4) 0;
  text-align: center;
}

.footer-bottom p {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
  :root {
    --font-size-6xl: 48px;
    --font-size-5xl: 40px;
  }

  .sectors-grid,
  .value-props {
    grid-template-columns: 1fr;
  }

  .architecture-flow {
    grid-template-columns: repeat(2, 1fr);
  }

  .architecture-step:nth-child(2)::after {
    display: none;
  }

  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-6xl: 40px;
    --font-size-5xl: 32px;
    --font-size-4xl: 28px;
    --font-size-3xl: 24px;
    --spacing-16: 80px;
    --spacing-12: 64px;
    --spacing-10: 48px;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    height: 100vh;
    width: 70%;
    max-width: 300px;
    background: rgba(26, 26, 26, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    justify-content: center;
    transition: right var(--transition-base);
    border-left: 1px solid var(--glass-border);
    padding: var(--spacing-6);
  }

  .nav-links.active {
    right: 0;
  }

  .hero {
    padding: var(--spacing-10) 0;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .deep-agents-grid,
  .architecture-flow,
  .case-studies-grid,
  .sectors-grid {
    grid-template-columns: 1fr;
  }

  .architecture-step::after {
    content: '↓';
    right: 50%;
    top: auto;
    bottom: calc(-1 * var(--spacing-4));
    transform: translateX(50%);
  }

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

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

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-3);
  }

  .btn {
    width: 100%;
  }
}