/* ============================================
   EKHOS MARKETING WEBSITE - PREMIUM DESIGN
   ============================================ */

/* ============================================
   CSS VARIABLES - DESIGN TOKENS
   ============================================ */
:root {
  /* Brand Colors - Ekhos Palette */
  --ekhos-indigo: #4F46E5;
  --ekhos-indigo-dark: #4338CA;
  --ekhos-indigo-light: #6366F1;
  --deep-navy: #1A1A2E;
  --echo-cyan: #06B6D4;
  --echo-cyan-light: #22D3EE;

  /* Neutral Colors */
  --white: #FFFFFF;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;

  /* Semantic Colors */
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;

  /* Spacing Scale */
  --spacing-xs: 0.25rem;
  /* 4px */
  --spacing-sm: 0.5rem;
  /* 8px */
  --spacing-md: 1rem;
  /* 16px */
  --spacing-lg: 1.5rem;
  /* 24px */
  --spacing-xl: 2rem;
  /* 32px */
  --spacing-2xl: 3rem;
  /* 48px */
  --spacing-3xl: 4rem;
  /* 64px */
  --spacing-4xl: 6rem;
  /* 96px */

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  /* 12px */
  --font-size-sm: 0.875rem;
  /* 14px */
  --font-size-base: 1rem;
  /* 16px */
  --font-size-lg: 1.125rem;
  /* 18px */
  --font-size-xl: 1.25rem;
  /* 20px */
  --font-size-2xl: 1.5rem;
  /* 24px */
  --font-size-3xl: 1.875rem;
  /* 30px */
  --font-size-4xl: 2.25rem;
  /* 36px */
  --font-size-5xl: 3rem;
  /* 48px */
  --font-size-6xl: 3.75rem;
  /* 60px */

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Border Radius */
  --radius-sm: 0.375rem;
  /* 6px */
  --radius-md: 0.5rem;
  /* 8px */
  --radius-lg: 0.75rem;
  /* 12px */
  --radius-xl: 1rem;
  /* 16px */
  --radius-2xl: 1.5rem;
  /* 24px */
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--gray-800);
  background: var(--white);
  overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: var(--deep-navy);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-5xl);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--font-size-4xl);
  letter-spacing: -0.01em;
}

h3 {
  font-size: var(--font-size-3xl);
}

h4 {
  font-size: var(--font-size-2xl);
}

p {
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-relaxed);
  color: var(--gray-600);
}

a {
  color: var(--ekhos-indigo);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--ekhos-indigo-dark);
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  transition: transform var(--transition-base);
}

.nav-logo:hover {
  transform: scale(1.05);
}

.nav-logo img {
  height: 72px;
  /* Slight increase for better visibility */
  width: auto;
  display: block;
}

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

.nav-links li a {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--gray-700);
  transition: all var(--transition-fast);
  position: relative;
  padding: var(--spacing-sm) 0;
}

.nav-links li a:not(.btn):hover {
  color: var(--ekhos-indigo);
}

.nav-links li a:not(.btn)::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--echo-cyan), var(--ekhos-indigo));
  transition: width var(--transition-base);
}

.nav-links li a:not(.btn):hover::after {
  width: 100%;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--deep-navy);
  cursor: pointer;
  padding: var(--spacing-sm);
  transition: transform var(--transition-fast);
}

.mobile-menu-toggle:hover {
  transform: scale(1.1);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2.5rem;
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

/* Balanced CTA button in navigation */
.nav-links .btn {
  padding: 0.75rem 2rem;
  /* More proportional/elegant padding */
}

.btn-primary {
  background: linear-gradient(135deg, var(--ekhos-indigo) 0%, var(--ekhos-indigo-dark) 100%);
  color: var(--white) !important;
  box-shadow: 0 4px 14px 0 rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--ekhos-indigo-dark) 0%, var(--ekhos-indigo) 100%);
  box-shadow: 0 6px 20px 0 rgba(79, 70, 229, 0.5);
  transform: translateY(-2px);
  color: var(--white);
}

.btn-secondary {
  background: var(--white);
  color: var(--ekhos-indigo);
  border-color: var(--ekhos-indigo);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--ekhos-indigo);
  color: var(--white);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: var(--white);
}

.btn-outline:hover {
  background: var(--white);
  color: var(--ekhos-indigo);
  transform: translateY(-2px);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #334155 100%);
  padding-top: 100px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(79, 70, 229, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(6, 182, 212, 0.15) 0%, transparent 50%);
  pointer-events: none;
}

.hero-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-4xl) var(--spacing-xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  animation: fadeInUp 0.8s ease-out;
}

.hero-content h1 {
  font-size: var(--font-size-6xl);
  color: var(--white);
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
}

.hero-tagline {
  font-size: var(--font-size-2xl);
  font-style: italic;
  color: var(--echo-cyan-light);
  margin-bottom: var(--spacing-xl);
  font-weight: 600;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--gray-300);
  margin-bottom: var(--spacing-2xl);
  line-height: var(--line-height-relaxed);
}

.hero-cta {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

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

/* ============================================
   SECTIONS
   ============================================ */
.section {
  padding: var(--spacing-4xl) var(--spacing-xl);
  position: relative;
}

.section-container {
  max-width: 1280px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-4xl);
}

.section-title {
  font-size: var(--font-size-4xl);
  color: var(--deep-navy);
  margin-bottom: var(--spacing-lg);
}

.section-subtitle {
  font-size: var(--font-size-xl);
  color: var(--gray-600);
  line-height: var(--line-height-relaxed);
}

/* Alternating section backgrounds */
.section:nth-child(even) {
  background: var(--gray-50);
}

/* ============================================
   FEATURES GRID
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-2xl);
}

.feature-card {
  background: var(--white);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--gray-200);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--ekhos-indigo);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-lg);
  display: inline-block;
}

.feature-icon i,
.feature-icon svg {
  width: 48px;
  height: 48px;
  stroke: var(--ekhos-indigo);
  stroke-width: 2;
}

.feature-title {
  font-size: var(--font-size-2xl);
  color: var(--deep-navy);
  margin-bottom: var(--spacing-md);
  font-weight: 700;
}

.feature-description {
  font-size: var(--font-size-base);
  color: var(--gray-700);
  line-height: var(--line-height-relaxed);
  color: var(--gray-700);
  /* Changed from gray-600 */
  line-height: 1.6;
}

/* ============================================
   PLATFORM INTEGRATION
   ============================================ */
.platforms {
  background: linear-gradient(135deg, var(--ekhos-indigo) 0%, var(--deep-navy) 100%) !important;
  color: var(--white);
}

.platforms .section-title {
  color: var(--white);
}

.platforms .section-subtitle {
  color: var(--gray-300);
}

.platform-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-3xl);
}

.platform-badge {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: 0.75rem 1.5rem;
  background: rgba(255, 255, 255, 0.05);
  /* Glass effect */
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  color: var(--white);
  font-weight: 500;
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.platform-badge:hover {
  transform: translateY(-4px) scale(1.05);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: var(--shadow-xl);
}

.platform-badge span {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--white);
}

/* ============================================
   HOW IT WORKS
   ============================================ */
.steps-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-3xl);
  margin-top: var(--spacing-3xl);
}

.step {
  position: relative;
  padding: var(--spacing-2xl);
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border: 2px solid var(--gray-200);
  transition: all var(--transition-base);
}

.step:hover {
  border-color: var(--ekhos-indigo);
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

.step-number {
  position: absolute;
  top: -20px;
  left: var(--spacing-2xl);
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--ekhos-indigo), var(--echo-cyan));
  color: var(--white);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  box-shadow: var(--shadow-lg);
}

.step-title {
  font-size: var(--font-size-2xl);
  color: var(--deep-navy);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  font-weight: 700;
}

.step-description {
  font-size: var(--font-size-base);
  color: var(--gray-700);
  line-height: var(--line-height-relaxed);
}

/* ============================================
   USE CASES
   ============================================ */
.use-case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-2xl);
}

.use-case {
  background: var(--white);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border-left: 4px solid var(--ekhos-indigo);
  transition: all var(--transition-base);
}

.use-case:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-xl);
  border-left-color: var(--echo-cyan);
}

.use-case-role {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--ekhos-indigo);
  margin-bottom: var(--spacing-md);
}

.use-case-quote {
  font-size: var(--font-size-base);
  color: var(--gray-700);
  line-height: var(--line-height-relaxed);
  font-style: italic;
  font-weight: 500;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
  background: linear-gradient(135deg, var(--deep-navy) 0%, var(--ekhos-indigo) 100%);
  padding: var(--spacing-4xl) var(--spacing-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 30% 50%, rgba(6, 182, 212, 0.2) 0%, transparent 50%),
    radial-gradient(circle at 70% 50%, rgba(79, 70, 229, 0.2) 0%, transparent 50%);
  pointer-events: none;
}

.cta-content {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.cta-content h2 {
  font-size: var(--font-size-5xl);
  color: var(--white);
  margin-bottom: var(--spacing-lg);
}

.cta-content p {
  font-size: var(--font-size-xl);
  color: var(--gray-200);
  margin-bottom: var(--spacing-2xl);
  line-height: var(--line-height-relaxed);
  font-weight: 500;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: var(--spacing-4xl) var(--spacing-xl) var(--spacing-2xl);
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
}

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

.footer-brand h3 {
  font-size: var(--font-size-2xl);
  color: var(--white);
  margin-bottom: var(--spacing-sm);
  font-weight: 700;
}

.footer-tagline {
  font-size: var(--font-size-sm);
  font-style: italic;
  color: var(--echo-cyan);
  margin-bottom: var(--spacing-md);
}

.footer-description {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--gray-400);
}

.footer-section h4 {
  font-size: var(--font-size-lg);
  color: var(--white);
  margin-bottom: var(--spacing-lg);
  font-weight: 600;
}

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

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

.footer-links a {
  color: var(--gray-400);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--echo-cyan);
}

.footer-bottom {
  padding-top: var(--spacing-2xl);
  border-top: 1px solid var(--gray-800);
  text-align: center;
}

.footer-bottom p {
  font-size: var(--font-size-sm);
  color: var(--gray-500);
}

/* ============================================
   LEGAL PAGES
   ============================================ */
.legal-page {
  padding-top: 100px;
  min-height: 100vh;
  background: var(--gray-50);
}

.legal-container {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-4xl) var(--spacing-xl);
}

.legal-header {
  text-align: center;
  margin-bottom: var(--spacing-4xl);
  padding-bottom: var(--spacing-2xl);
  border-bottom: 2px solid var(--ekhos-indigo);
}

.legal-header h1 {
  font-size: var(--font-size-5xl);
  color: var(--deep-navy);
  margin-bottom: var(--spacing-md);
}

.legal-date {
  font-size: var(--font-size-base);
  color: var(--gray-600);
  font-style: italic;
}

.legal-content {
  background: var(--white);
  padding: var(--spacing-3xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.legal-content h2 {
  font-size: var(--font-size-3xl);
  color: var(--deep-navy);
  margin-top: var(--spacing-3xl);
  margin-bottom: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--gray-200);
}

.legal-content h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.legal-content h3 {
  font-size: var(--font-size-xl);
  color: var(--ekhos-indigo);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.legal-content p {
  margin-bottom: var(--spacing-lg);
  line-height: var(--line-height-relaxed);
}

.legal-content ul,
.legal-content ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-2xl);
}

.legal-content li {
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-relaxed);
  color: var(--gray-600);
}

.legal-content a {
  color: var(--ekhos-indigo);
  text-decoration: underline;
}

.legal-content a:hover {
  color: var(--echo-cyan);
}

.legal-content strong {
  color: var(--deep-navy);
  font-weight: 600;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  :root {
    --font-size-6xl: 3rem;
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
  }

  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    text-align: center;
  }

  .hero-cta {
    justify-content: center;
  }

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

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

/* Mobile */
@media (max-width: 768px) {
  :root {
    --font-size-6xl: 2.5rem;
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --spacing-4xl: 3rem;
  }

  .nav-container {
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .nav-logo img {
    height: 50px;
  }

  .nav-links {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-base);
    pointer-events: none;
    gap: var(--spacing-md);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

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

  .hero {
    min-height: auto;
    padding: var(--spacing-4xl) 0;
  }

  .section {
    padding: var(--spacing-3xl) var(--spacing-lg);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

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

  .platform-logos {
    gap: var(--spacing-lg);
  }

  .legal-content {
    padding: var(--spacing-xl);
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  .btn {
    width: 100%;
    padding: 1rem;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

  .nav-logo img {
    height: 45px;
  }
}

/* ============================================
   ANIMATIONS
   ============================================ */
.animate-fade-in-up {
  animation: fadeInUp 0.8s ease-out;
}

/* Smooth transitions for all interactive elements */
button,
a,
.feature-card,
.step,
.use-case,
.platform-badge {
  transition: all var(--transition-base);
}

/* Focus styles for accessibility */
*:focus-visible {
  outline: 2px solid var(--ekhos-indigo);
  outline-offset: 2px;
}