/* ==========================================================
   FusionGate Marketing Website
   Light Enterprise Theme - Inspired by Startel International
   ========================================================== */

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

:root {
  /* Colors - Light Theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-elevated: #ffffff;
  --bg-hero: linear-gradient(135deg, #f8fafc 0%, #eef2ff 50%, #f5f3ff 100%);
  
  --border-primary: #e2e8f0;
  --border-secondary: #cbd5e1;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #64748b;
  --text-muted: #94a3b8;
  
  --accent-primary: #7c3aed;
  --accent-primary-hover: #6d28d9;
  --accent-light: #ede9fe;
  --accent-secondary: #8b5cf6;
  
  --success: #10b981;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --error: #ef4444;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
  
  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Shadows - Light mode */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition: 150ms ease;
  --transition-slow: 300ms ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

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

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

/* =========================
   Typography
   ========================= */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1.25rem;
}

p {
  color: var(--text-secondary);
}

/* =========================
   Buttons
   ========================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.5;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
  box-shadow: 0 1px 2px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
  background: var(--accent-primary-hover);
  border-color: var(--accent-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.4);
}

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border-color: var(--border-secondary);
}

.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-secondary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

.btn-ghost:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: 16px;
}

.btn-block {
  width: 100%;
}

/* =========================
   Navigation
   ========================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-primary);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.logo-icon {
  font-size: 24px;
  color: var(--accent-primary);
}

.nav-links {
  display: flex;
  gap: var(--space-8);
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
}

/* =========================
   Hero Section
   ========================= */
.hero {
  padding: calc(72px + var(--space-20)) 0 var(--space-20);
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--bg-hero);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-badge {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  background: var(--accent-light);
  border: 1px solid rgba(124, 58, 237, 0.2);
  border-radius: var(--radius-xl);
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-primary);
  margin-bottom: var(--space-6);
}

.hero h1 {
  margin-bottom: var(--space-6);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
}

.hero-stats {
  display: flex;
  gap: var(--space-10);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-primary);
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent-primary);
}

.stat-label {
  font-size: 13px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Hero Visual - Dashboard Preview */
.hero-visual {
  display: flex;
  justify-content: center;
}

.dashboard-preview {
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  width: 100%;
  max-width: 480px;
}

.preview-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
}

.preview-dots {
  display: flex;
  gap: var(--space-2);
}

.preview-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.preview-dots span:nth-child(1) { background: #ef4444; }
.preview-dots span:nth-child(2) { background: #f59e0b; }
.preview-dots span:nth-child(3) { background: #10b981; }

.preview-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-tertiary);
}

.preview-content {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.preview-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius);
  padding: var(--space-4);
}

.preview-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: var(--space-2);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-dot.active { background: var(--success); }
.status-dot.pending { background: var(--warning); }

.preview-card-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
}

.preview-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.preview-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3);
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius);
}

.license-key {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
}

.license-status {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.license-status.active {
  background: var(--success-light);
  color: var(--success);
}

.license-status.pending {
  background: var(--warning-light);
  color: var(--warning);
}

/* =========================
   Section Styling
   ========================= */
section {
  padding: var(--space-20) 0;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-12);
}

.section-header p {
  margin-top: var(--space-4);
  font-size: 18px;
}

/* =========================
   Features Section
   ========================= */
.features {
  background: var(--bg-primary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.feature-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: all var(--transition);
}

.feature-card:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-light);
  border-radius: var(--radius);
  font-size: 24px;
  margin-bottom: var(--space-4);
}

.feature-card h3 {
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

.feature-card p {
  font-size: 14px;
  color: var(--text-tertiary);
  line-height: 1.6;
}

/* =========================
   How It Works
   ========================= */
.how-it-works {
  background: var(--bg-secondary);
}

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: var(--space-4);
  max-width: 900px;
  margin: 0 auto;
}

.step {
  flex: 1;
  text-align: center;
  padding: var(--space-6);
}

.step-number {
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-primary);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: var(--space-5);
}

.step h3 {
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

.step p {
  font-size: 14px;
  color: var(--text-tertiary);
}

.step-connector {
  width: 60px;
  height: 2px;
  background: var(--border-secondary);
  margin-top: 48px;
  flex-shrink: 0;
}

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

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  position: relative;
  transition: all var(--transition);
}

.pricing-card:hover {
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  border: 2px solid var(--accent-primary);
  transform: scale(1.02);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-xl);
}

.pricing-header {
  text-align: center;
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--border-primary);
  margin-bottom: var(--space-6);
}

.pricing-tier {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-price {
  margin: var(--space-4) 0;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
}

.price-currency {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-tertiary);
}

.price-amount {
  font-size: 48px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.price-period {
  font-size: 14px;
  color: var(--text-tertiary);
  margin-left: var(--space-1);
}

.pricing-description {
  font-size: 14px;
  color: var(--text-tertiary);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--space-6);
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  font-size: 14px;
  color: var(--text-secondary);
}

.pricing-features .check {
  color: var(--success);
  font-weight: 600;
}

/* =========================
   Documentation Section
   ========================= */
.docs {
  background: var(--bg-secondary);
}

.docs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.doc-card {
  display: block;
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  text-align: center;
  transition: all var(--transition);
}

.doc-card:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.doc-icon {
  font-size: 32px;
  margin-bottom: var(--space-4);
}

.doc-card h3 {
  font-size: 16px;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.doc-card p {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* =========================
   CTA Section
   ========================= */
.cta {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  text-align: center;
  padding: var(--space-16) 0;
}

.cta h2 {
  color: #fff;
  margin-bottom: var(--space-4);
}

.cta p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 18px;
  margin-bottom: var(--space-8);
}

.cta-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
}

.cta .btn-primary {
  background: #fff;
  color: var(--accent-primary);
  border-color: #fff;
}

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

.cta .btn-ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.3);
}

.cta .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* =========================
   Footer
   ========================= */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-primary);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-brand {
  max-width: 280px;
}

.footer-brand .logo {
  margin-bottom: var(--space-4);
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-tertiary);
}

.footer-links h4 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

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

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

.footer-links a {
  font-size: 14px;
  color: var(--text-tertiary);
  transition: color var(--transition);
}

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

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-primary);
  text-align: center;
}

.footer-bottom p {
  font-size: 14px;
  color: var(--text-muted);
}

/* =========================
   Contact Page Styles
   ========================= */
.contact-hero {
  padding: calc(72px + var(--space-16)) 0 var(--space-12);
  background: var(--bg-hero);
  text-align: center;
}

.contact-hero h1 {
  margin-bottom: var(--space-4);
}

.contact-section {
  padding: var(--space-16) 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  max-width: 1000px;
  margin: 0 auto;
}

.contact-form {
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  padding: var(--space-8);
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-info-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}

.contact-info-card h3 {
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

.contact-info-card p {
  font-size: 14px;
  color: var(--text-tertiary);
}

.contact-info-card a {
  color: var(--accent-primary);
}

.contact-info-card a:hover {
  text-decoration: underline;
}

/* =========================
   Responsive Design
   ========================= */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .dashboard-preview {
    max-width: 400px;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .docs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .hero {
    min-height: auto;
    padding-top: calc(72px + var(--space-12));
    padding-bottom: var(--space-12);
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--space-4);
    align-items: center;
  }
  
  .steps {
    flex-direction: column;
    gap: var(--space-2);
  }
  
  .step-connector {
    display: none;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .docs-grid {
    grid-template-columns: 1fr;
  }
  
  .cta-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-4);
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .dashboard-preview {
    max-width: 100%;
  }
}

/* =========================
   Mobile Navigation
   ========================= */
.nav-links.active {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-primary);
  padding: var(--space-6);
  gap: var(--space-4);
  box-shadow: var(--shadow-lg);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

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

.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

.hidden { display: none; }

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

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

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }