/* PolicySafeguard Main Stylesheet */
/* Premium, professional design for network security excellence */

/* ============================================
   CSS Variables & Design System
   ============================================ */
:root {
  /* Primary Colors - Security-focused palette */
  --ps-emerald: #00ff88;
  --ps-deep-emerald: #00cc6a;
  --ps-dark-emerald: #00994d;
  --ps-light-emerald: #66ffbb;

  /* Neutral Colors */
  --ps-white: #FFFFFF;
  --ps-off-white: #F9FAFB;
  --ps-light-gray: #E5E7EB;
  --ps-gray: #6B7280;
  --ps-dark-gray: #374151;
  --ps-charcoal: #1F2937;
  --ps-black: #0a0f1a;
  --ps-dark-bg: #0d1117;

  /* Status Colors */
  --ps-success: #10B981;
  --ps-warning: #F59E0B;
  --ps-danger: #EF4444;
  --ps-info: #3B82F6;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Orbitron', 'Inter', sans-serif;
  --font-mono: 'Courier New', 'Monaco', 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;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Shadows */
  --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 30px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 20px rgba(0, 255, 136, 0.3);
}

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

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

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

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ps-black);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.75rem;
  font-weight: 600;
}

h4 {
  font-size: 1.375rem;
  font-weight: 600;
}

h5 {
  font-size: 1.125rem;
  font-weight: 600;
}

h6 {
  font-size: 1rem;
  font-weight: 600;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--ps-dark-gray);
  font-size: 1.0625rem;
  line-height: 1.7;
}

a {
  color: var(--ps-emerald);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--ps-deep-emerald);
}

code {
  font-family: var(--font-mono);
  background-color: var(--ps-off-white);
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--ps-dark-emerald);
}

/* ============================================
   Navigation
   ============================================ */
.nav-header {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--ps-light-gray);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

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

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--ps-black);
  text-decoration: none;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo span {
  background: linear-gradient(135deg, var(--ps-emerald) 0%, var(--ps-deep-emerald) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-logo:hover {
  opacity: 0.8;
}

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

.nav-link {
  color: var(--ps-dark-gray);
  font-weight: 500;
  font-size: 0.9375rem;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 6px;
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--ps-emerald);
  background-color: rgba(0, 255, 136, 0.08);
}

.nav-cta {
  background: linear-gradient(135deg, var(--ps-emerald) 0%, var(--ps-deep-emerald) 100%);
  color: var(--ps-black) !important;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 6px;
  font-weight: 600;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 8px rgba(0, 255, 136, 0.2);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 255, 136, 0.3);
  background: linear-gradient(135deg, var(--ps-light-emerald) 0%, var(--ps-emerald) 100%);
}

/* Mobile Navigation Toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  flex-direction: column;
  gap: 4px;
}

.nav-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--ps-charcoal);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ============================================
   Layout Components
   ============================================ */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-3xl) 0;
}

.section-alt {
  background-color: var(--ps-off-white);
}

.section-dark {
  background: linear-gradient(135deg, var(--ps-black) 0%, var(--ps-dark-bg) 100%);
  color: var(--ps-white);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4,
.section-dark h5,
.section-dark h6 {
  color: var(--ps-white);
}

.section-dark p {
  color: var(--ps-light-gray);
}

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

.section-title {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--ps-black);
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--ps-gray);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.7;
}

.section-divider {
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--ps-emerald) 0%, var(--ps-deep-emerald) 100%);
  margin: 0 auto var(--spacing-md);
  border-radius: 2px;
}

/* ============================================
   Grid Systems
   ============================================ */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

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

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ============================================
   Cards
   ============================================ */
.card {
  background-color: var(--ps-white);
  border-radius: 16px;
  padding: var(--spacing-xl);
  border: 1px solid var(--ps-light-gray);
  transition: all var(--transition-normal);
  height: 100%;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
  border-color: var(--ps-emerald);
}

.card-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, rgba(0, 255, 136, 0.1) 0%, rgba(0, 255, 136, 0.2) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  color: var(--ps-emerald);
  font-size: 2rem;
}

.card-title {
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--ps-black);
}

.card-description {
  font-size: 1rem;
  color: var(--ps-gray);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  font-family: var(--font-primary);
}

.btn-primary {
  background: linear-gradient(135deg, var(--ps-emerald) 0%, var(--ps-deep-emerald) 100%);
  color: var(--ps-black);
  box-shadow: 0 4px 12px rgba(0, 255, 136, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 255, 136, 0.35);
  color: var(--ps-black);
}

.btn-secondary {
  background-color: transparent;
  color: var(--ps-emerald);
  border: 2px solid var(--ps-emerald);
}

.btn-secondary:hover {
  background-color: var(--ps-emerald);
  color: var(--ps-black);
}

.btn-dark {
  background-color: var(--ps-black);
  color: var(--ps-white);
  border: 2px solid var(--ps-black);
}

.btn-dark:hover {
  background-color: var(--ps-charcoal);
  border-color: var(--ps-charcoal);
  color: var(--ps-white);
}

.btn-large {
  padding: 1.125rem 2.25rem;
  font-size: 1.125rem;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  background: linear-gradient(135deg, var(--ps-black) 0%, #0d1b2a 50%, var(--ps-dark-bg) 100%);
  color: var(--ps-white);
  padding: var(--spacing-3xl) 0;
  min-height: 600px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 50%, rgba(0, 255, 136, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  max-width: 900px;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--ps-white);
  margin-bottom: var(--spacing-md);
  line-height: 1.1;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--ps-emerald) 0%, var(--ps-light-emerald) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.375rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--spacing-xl);
  line-height: 1.7;
}

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

/* ============================================
   Stats Section
   ============================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-xl);
  text-align: center;
}

.stat-item {
  padding: var(--spacing-lg);
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--ps-emerald) 0%, var(--ps-deep-emerald) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: 1rem;
  color: var(--ps-gray);
  font-weight: 500;
  line-height: 1.5;
}

/* ============================================
   Feature Highlights
   ============================================ */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  margin-bottom: var(--spacing-3xl);
}

.feature-row:nth-child(even) {
  direction: rtl;
}

.feature-row:nth-child(even) > * {
  direction: ltr;
}

.feature-content h3 {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

.feature-image {
  background: linear-gradient(135deg, rgba(0, 255, 136, 0.05) 0%, rgba(0, 255, 136, 0.1) 100%);
  border: 1px solid rgba(0, 255, 136, 0.2);
  border-radius: 16px;
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ps-emerald);
  padding: var(--spacing-xl);
}

/* ============================================
   Pricing Cards
   ============================================ */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.pricing-card {
  background-color: var(--ps-white);
  border: 2px solid var(--ps-light-gray);
  border-radius: 16px;
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-normal);
}

.pricing-card.featured {
  border-color: var(--ps-emerald);
  box-shadow: 0 0 40px rgba(0, 255, 136, 0.2);
  transform: scale(1.05);
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.pricing-badge {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  background: linear-gradient(135deg, var(--ps-emerald) 0%, var(--ps-deep-emerald) 100%);
  color: var(--ps-black);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-md);
}

.pricing-name {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--ps-black);
  margin-bottom: var(--spacing-xs);
}

.pricing-period {
  color: var(--ps-gray);
  font-size: 1rem;
  margin-bottom: var(--spacing-lg);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--spacing-xl);
  text-align: left;
}

.pricing-features li {
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--ps-light-gray);
  color: var(--ps-dark-gray);
  display: flex;
  align-items: start;
  gap: var(--spacing-sm);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features li::before {
  content: '✓';
  color: var(--ps-emerald);
  font-weight: 700;
  font-size: 1.125rem;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background-color: var(--ps-black);
  color: var(--ps-light-gray);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

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

.footer-section h4 {
  color: var(--ps-white);
  margin-bottom: var(--spacing-md);
  font-size: 1.125rem;
}

.footer-section p,
.footer-section a {
  color: var(--ps-light-gray);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.footer-section a:hover {
  color: var(--ps-emerald);
}

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

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
  color: var(--ps-gray);
  font-size: 0.875rem;
}

/* ============================================
   Forms
   ============================================ */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--ps-black);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--ps-light-gray);
  border-radius: 8px;
  font-family: var(--font-primary);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--ps-emerald);
  box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.1);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
  .grid-3,
  .grid-4,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .feature-row:nth-child(even) {
    direction: ltr;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  h1 {
    font-size: 2.25rem;
  }

  h2 {
    font-size: 1.875rem;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }

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

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

  .section-title {
    font-size: 2rem;
  }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center {
  text-align: center;
}

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

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

.mb-0 {
  margin-bottom: 0;
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

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

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

.mt-0 {
  margin-top: 0;
}

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mt-xl {
  margin-top: var(--spacing-xl);
}

.badge {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  background: linear-gradient(135deg, rgba(0, 255, 136, 0.1) 0%, rgba(0, 255, 136, 0.2) 100%);
  color: var(--ps-emerald);
  border: 1px solid rgba(0, 255, 136, 0.3);
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.highlight {
  color: var(--ps-emerald);
  font-weight: 600;
}

/* ============================================
   Code Blocks & Technical Content
   ============================================ */
.code-block {
  background-color: var(--ps-black);
  color: var(--ps-emerald);
  padding: var(--spacing-lg);
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
  border: 1px solid rgba(0, 255, 136, 0.2);
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}