/* Enterprise Cybersecurity Design System - Quantum Secure Gateway */
/* Restrained, professional palette for enterprise trust signals */

/* Color Palette - Enterprise Dark Theme */
:root {
  /* Core Colors */
  --color-charcoal: #1a1c21;
  --color-slate: #2d3139;
  --color-offwhite: #f5f7f8;
  --color-muted: #6b7280;
  --color-steel: #9ca3af;
  --color-mutedTeal: #0d9488;
  --color-subtleGold: #d4af37;
  
  /* Semantic Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-info: #3b82f6;
  
  /* Typography */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Layout */
  --container-width: 1200px;
  --container-width-lg: 1400px;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --border-radius-sm: 4px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

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

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

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; font-weight: 700; }
h2 { font-size: 2rem; font-weight: 600; }
h3 { font-size: 1.5rem; font-weight: 600; }
h4 { font-size: 1.25rem; font-weight: 600; }
h5 { font-size: 1rem; font-weight: 600; }
h6 { font-size: 0.875rem; font-weight: 600; }

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-offwhite);
}

a {
  color: var(--color-mutedTeal);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-subtleGold);
}

/* Layout */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-lg {
  max-width: var(--container-width-lg);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Navigation */
.navbar {
  background-color: var(--color-charcoal);
  border-bottom: 1px solid var(--color-slate);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.navbar-brand {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-offwhite);
  text-decoration: none;
}

.navbar-brand span {
  color: var(--color-mutedTeal);
}

.navbar-links {
  display: flex;
  gap: var(--spacing-lg);
}

.navbar-links a {
  color: var(--color-offwhite);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-sm);
  transition: all 0.2s ease;
}

.navbar-links a:hover {
  background-color: var(--color-slate);
  color: var(--color-mutedTeal);
}

.navbar-cta {
  display: flex;
  gap: var(--spacing-sm);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-weight: 600;
  border-radius: var(--border-radius);
  transition: all 0.2s ease;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-mutedTeal);
  color: var(--color-offwhite);
  border: 1px solid var(--color-mutedTeal);
}

.btn-primary:hover {
  background-color: var(--color-subtleGold);
  border-color: var(--color-subtleGold);
  color: var(--color-charcoal);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-offwhite);
  border: 1px solid var(--color-steel);
}

.btn-secondary:hover {
  background-color: var(--color-slate);
  border-color: var(--color-steel);
  color: var(--color-offwhite);
}

/* Hero Section */
.hero {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, var(--color-charcoal) 0%, var(--color-slate) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 20%, rgba(13, 148, 136, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(212, 175, 55, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

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

.hero-text h1 {
  font-size: 3rem;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
}

.hero-text p {
  font-size: 1.125rem;
  color: var(--color-steel);
  margin-bottom: var(--spacing-xl);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Section */
.section {
  padding: var(--spacing-2xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.section-header p {
  font-size: 1.125rem;
  color: var(--color-steel);
  max-width: 600px;
  margin: 0 auto;
}

/* Cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.card {
  background-color: var(--color-slate);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  transition: all 0.3s ease;
  border: 1px solid var(--color-slate);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-mutedTeal);
}

.card-icon {
  width: 48px;
  height: 48px;
  background-color: rgba(13, 148, 136, 0.1);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  color: var(--color-mutedTeal);
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-offwhite);
}

.card p {
  color: var(--color-steel);
  margin-bottom: 0;
}

/* Architecture Layers */
.architecture-diagram {
  background-color: var(--color-slate);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-2xl) 0;
  position: relative;
}

.architecture-layer {
  display: flex;
  align-items: center;
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  background-color: var(--color-charcoal);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--color-mutedTeal);
}

.architecture-layer:last-child {
  margin-bottom: 0;
}

.architecture-layer-number {
  width: 32px;
  height: 32px;
  background-color: var(--color-mutedTeal);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin-right: var(--spacing-md);
  flex-shrink: 0;
}

.architecture-layer-content h4 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xs);
  color: var(--color-offwhite);
}

.architecture-layer-content p {
  font-size: 0.875rem;
  color: var(--color-steel);
  margin-bottom: 0;
}

/* Solutions */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.solution-card {
  background-color: var(--color-slate);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  transition: all 0.3s ease;
}

.solution-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-mutedTeal);
}

.solution-card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-offwhite);
}

.solution-card p {
  color: var(--color-steel);
  margin-bottom: var(--spacing-lg);
}

.solution-card ul {
  list-style: none;
  padding-left: 0;
}

.solution-card li {
  padding: var(--spacing-xs) 0;
  padding-left: var(--spacing-lg);
  position: relative;
  color: var(--color-offwhite);
}

.solution-card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-mutedTeal);
}

/* Security */
.security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.security-item {
  background-color: var(--color-slate);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
}

.security-item h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-offwhite);
}

.security-item p {
  color: var(--color-steel);
  margin-bottom: 0;
}

/* API / Developers */
.api-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.api-card {
  background-color: var(--color-slate);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
}

.api-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-offwhite);
}

.api-card .api-method {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--color-charcoal);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  margin-right: var(--spacing-xs);
  color: var(--color-mutedTeal);
}

.api-card .api-path {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-steel);
}

.api-card p {
  color: var(--color-steel);
  margin-bottom: 0;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
}

.contact-info h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
  color: var(--color-offwhite);
}

.contact-info p {
  color: var(--color-steel);
  margin-bottom: var(--spacing-lg);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: var(--spacing-lg);
}

.contact-item-icon {
  width: 40px;
  height: 40px;
  background-color: var(--color-slate);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--spacing-md);
  color: var(--color-mutedTeal);
}

.contact-item h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
  color: var(--color-offwhite);
}

.contact-item p {
  font-size: 0.875rem;
  color: var(--color-steel);
  margin-bottom: 0;
}

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

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

.footer-brand h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-offwhite);
}

.footer-brand p {
  color: var(--color-steel);
  margin-bottom: var(--spacing-lg);
}

.footer-links h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-offwhite);
}

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

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

.footer-links a {
  color: var(--color-steel);
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid var(--color-slate);
  padding-top: var(--spacing-lg);
  text-align: center;
  color: var(--color-muted);
}

/* Mobile Navigation */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  transition: background-color 0.2s ease;
}

.mobile-menu-toggle:hover {
  background-color: var(--color-slate);
}

.mobile-menu-toggle:focus {
  outline: 2px solid var(--color-mutedTeal);
  outline-offset: 2px;
}

.mobile-menu-toggle .hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-offwhite);
  position: relative;
  transition: background-color 0.2s ease;
}

.mobile-menu-toggle .hamburger::before,
.mobile-menu-toggle .hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background-color: var(--color-offwhite);
  left: 0;
  transition: transform 0.2s ease;
}

.mobile-menu-toggle .hamburger::before {
  top: -7px;
}

.mobile-menu-toggle .hamburger::after {
  top: 7px;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger {
  background-color: transparent;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger::before {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger::after {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu Panel */
.mobile-menu {
  display: none;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  background-color: var(--color-charcoal);
  border-bottom: 1px solid var(--color-slate);
  padding: var(--spacing-lg);
  z-index: 99;
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

@media (max-width: 768px) {
  .mobile-menu.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
  }
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.mobile-menu-links a {
  color: var(--color-offwhite);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-sm);
  transition: all 0.2s ease;
  display: block;
}

.mobile-menu-links a:hover,
.mobile-menu-links a:focus {
  background-color: var(--color-slate);
  color: var(--color-mutedTeal);
}

.mobile-menu-links a:focus {
  outline: 2px solid var(--color-mutedTeal);
  outline-offset: 2px;
}

.mobile-menu-cta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-slate);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  
  .navbar-links {
    display: none;
  }
  
  .navbar-cta {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .solution-card, .security-item, .api-card {
    padding: var(--spacing-lg);
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-muted { color: var(--color-steel); }
.text-gold { color: var(--color-subtleGold); }
.text-teal { color: var(--color-mutedTeal); }

.bg-charcoal { background-color: var(--color-charcoal); }
.bg-slate { background-color: var(--color-slate); }

.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-lg); }
.mt-3 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-lg); }
.mb-3 { margin-bottom: var(--spacing-xl); }

.note-banner {
  display: inline-block;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: rgba(13, 148, 136, 0.12);
  border: 1px solid rgba(13, 148, 136, 0.35);
  border-radius: var(--border-radius);
  color: var(--color-offwhite);
  font-size: 0.875rem;
}

.hero-panel {
  background-color: rgba(26, 28, 33, 0.78);
  border: 1px solid rgba(156, 163, 175, 0.2);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
}

.hero-panel h3 {
  margin-bottom: var(--spacing-md);
}

.hero-list,
.feature-list {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.hero-list li,
.feature-list li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-steel);
}

.hero-list li:last-child,
.feature-list li:last-child {
  margin-bottom: 0;
}

.hero-list li::before,
.feature-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-mutedTeal);
}

.scope-card {
  border: 1px solid rgba(156, 163, 175, 0.12);
}

.scope-card p,
.scope-card li {
  color: var(--color-steel);
}

@media (max-width: 768px) {
  .hero-panel {
    padding: var(--spacing-lg);
  }

  .note-banner {
    display: block;
  }
}