/* Custom Properties for Design System */
:root {
  /* Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --accent: #4f46e5;
  --accent-light: #e0e7ff;
  
  --success: #16a34a;
  --success-light: #dcfce7;
  --error: #dc2626;
  --error-light: #fee2e2;

  --border-color: #e2e8f0;
  --border-focus: #cbd5e1;

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Layout and Shapes */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05), 0 1px 2px rgba(15, 23, 42, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -2px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 10px 10px -5px rgba(15, 23, 42, 0.04);

  --max-width: 1200px;
  --max-width-narrow: 800px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.25;
}

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

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

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

code {
  font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
  background-color: var(--bg-tertiary);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-narrow {
  max-width: var(--max-width-narrow);
}

.grid-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.align-center {
  align-items: center;
}

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

.bg-alt {
  background-color: var(--bg-secondary);
}

.rounded-img {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.shadow-sm {
  box-shadow: var(--shadow-md);
}

.responsive-img {
  width: 100%;
  height: auto;
}

/* Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

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

.btn-full {
  width: 100%;
}

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

/* Header & Navigation */
#main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  z-index: 1000;
  transition: all var(--transition-normal);
}

#main-header.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-primary);
}

.logo-img {
  width: 2.25rem;
  height: 2.25rem;
  object-fit: contain;
}

.logo-text {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

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

.nav-links .nav-demo-btn {
  color: var(--accent);
}

.nav-links .nav-demo-btn:hover {
  color: var(--primary);
}

.nav-links .text-link-cta {
  background-color: var(--primary-light);
  color: var(--primary);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.nav-links .text-link-cta:hover {
  background-color: var(--primary);
  color: #ffffff;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 1.5rem;
  height: 1rem;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1010;
}

.mobile-menu-btn .bar {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  transition: all var(--transition-fast);
}

/* Sections Common */
section {
  padding: 6rem 0;
}

.section-header {
  max-width: 700px;
  margin: 0 auto 4rem auto;
}

.section-tag {
  display: inline-block;
  color: var(--accent);
  background-color: var(--accent-light);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.section-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
}

/* Hero Section */
#hero {
  padding: 9rem 0 6rem 0;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.hero-container {
  display: flex;
  align-items: center;
  gap: 4rem;
}

.hero-content {
  flex: 1;
}

.hero-visual {
  flex: 1.1;
}

.hero-title {
  font-size: 3.5rem;
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary) 60%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
}

.hero-image {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-color);
  width: 100%;
}

/* Live Demo Section */
.demo-showcase {
  margin-top: 2rem;
}

.demo-screenshots-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
}

.demo-screenshot-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

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

.demo-screenshot-card .screenshot-label {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  text-align: center;
}

.demo-screenshot-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  object-fit: cover;
  margin-bottom: 1.25rem;
  transition: transform var(--transition-normal);
}

.demo-screenshot-card:hover .demo-screenshot-img {
  transform: scale(1.01);
}

.screenshot-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  text-align: center;
  margin-top: auto;
}

.demo-cta-wrapper {
  margin-bottom: 3rem;
  padding: 2.5rem;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--primary-light) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.demo-cta-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Problem/Solution Section */
#problem-solution {
  border-bottom: 1px solid var(--border-color);
}

.ps-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.ps-item {
  display: flex;
  gap: 1.25rem;
  background-color: var(--bg-secondary);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.ps-item h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.ps-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.bullet {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  font-weight: 700;
  flex-shrink: 0;
}

.bullet-red {
  background-color: var(--error-light);
  color: var(--error);
}

.bullet-green {
  background-color: var(--success-light);
  color: var(--success);
}

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 2.5rem 2rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

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

.feature-icon {
  font-size: 2.25rem;
  margin-bottom: 1.5rem;
  display: inline-block;
  line-height: 1;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.feature-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Security Section */
.security-layout {
  max-width: 900px;
  margin: 0 auto;
}

.security-steps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.sec-step {
  display: flex;
  gap: 1.5rem;
  background-color: var(--bg-primary);
  padding: 2.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.step-num {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  opacity: 0.4;
}

.step-info h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.step-info p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Pricing Section */
.pricing-graphic-wrapper {
  display: flex;
  justify-content: center;
  margin-bottom: 3.5rem;
}

.pricing-graphic {
  max-width: 600px;
  width: 100%;
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.price-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-md);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.premium-plan {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-xl);
}

.popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--primary);
  color: #ffffff;
  padding: 0.25rem 1rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.price-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
  margin-bottom: 2rem;
  text-align: center;
}

.plan-name {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.premium-plan .plan-name {
  color: var(--primary);
}

.plan-price {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.price-period {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.price-features {
  margin-bottom: 2.5rem;
}

.price-features ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.price-features li {
  font-size: 0.95rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.price-features li::before {
  content: "✓";
  color: var(--success);
  font-weight: bold;
}

.price-cta {
  margin-top: auto;
}

/* FAQ Accordion Section */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.faq-accordion details {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.faq-accordion details[open] {
  border-color: var(--border-focus);
}

.faq-accordion summary {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-accordion summary::-webkit-details-marker {
  display: none;
}

/* Add custom directional icon */
.faq-accordion summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text-muted);
  line-height: 1;
  transition: transform var(--transition-fast);
}

.faq-accordion details[open] summary::after {
  content: "−";
}

.faq-content {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Download CTA Section */
.download-cta {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--primary-light) 100%);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.download-cta h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

/* Footer Section */
#main-footer {
  background-color: var(--bg-secondary);
  padding: 4.5rem 0 2rem 0;
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 3.5rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 1rem;
  max-width: 300px;
}

.footer-links h4, .footer-info h4 {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
  color: var(--text-muted);
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

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

.footer-info p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Mobile Responsiveness */
@media (max-width: 968px) {
  .hero-container {
    flex-direction: column;
    text-align: center;
    gap: 3rem;
  }

  .hero-title {
    font-size: 2.75rem;
  }

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

  .grid-two-col {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .ps-content {
    order: -1;
  }

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

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

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .demo-screenshots-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  section {
    padding: 4rem 0;
  }

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

  .hero-ctas {
    flex-direction: column;
    gap: 0.75rem;
  }

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

  .nav-links {
    display: none;
    position: absolute;
    top: 4.5rem;
    left: 0;
    width: 100%;
    background-color: var(--bg-primary);
    flex-direction: column;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--border-color);
    gap: 1.5rem;
    align-items: stretch;
    text-align: center;
  }

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

  .mobile-menu-btn {
    display: flex;
  }

  /* Animate menu btn to close icon */
  .mobile-menu-btn.active .bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .mobile-menu-btn.active .bar:nth-child(2) {
    opacity: 0;
  }
  .mobile-menu-btn.active .bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}