/* ============================
   Root variables & resets
============================ */
:root {
  /* Enhanced color palette */
  --bg-primary: #0B1220;
  --bg-surface: #0F172A;
  --bg-card: #111827;
  --bg-card-hover: #1E293B;
  --accent-primary: #3B82F6;
  --accent-primary-dark: #2563EB;
  --accent-secondary: #06B6D4;
  --accent-secondary-dark: #0891B2;
  --success: #22C55E;
  --warning: #F59E0B;
  --critical: #EF4444;
  --text-primary: #E5E7EB;
  --text-muted: #94A3B8;
  --text-light: #CBD5E1;
  --border: #1F2937;
  --border-light: #374151;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --section-padding: 6rem 0;
  --container-max: 1280px;
  --border-radius: 16px;
  --border-radius-lg: 24px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.3);

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

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ============================
   Header (transparent by default)
============================ */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  /* Transparent at rest */
  background-color: transparent;
  backdrop-filter: none;
  z-index: 1000;
  padding: 1rem 0;
  transition: all var(--transition-normal);
  border-bottom: 1px solid transparent;
}

header.scrolled {
  background-color: rgba(11, 18, 32, 0.85);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}

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

.logo {
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo span { color: var(--accent-primary); }

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 8px;
}

.logo-icon svg {
  width: 18px;
  height: 18px;
  color: #fff;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

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

nav a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  transition: width var(--transition-normal);
}

nav a:hover::after { width: 100%; }

.cta-buttons {
  display: flex;
  gap: 1rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  border: none;
  font-family: var(--font-primary);
  font-size: 0.95rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-primary-dark));
  color: #fff;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

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

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
  border-color: var(--accent-primary);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--accent-primary);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ============================
   Hero
============================ */
.hero {
  padding: 10rem 0 6rem;
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse at top, rgba(59, 130, 246, 0.1), transparent 70%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23374151' fill-opacity='0.1' fill-rule='evenodd'/%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-content {
  max-width: 800px;
  position: relative;
  z-index: 2;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: #fff;
}

h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  max-width: 600px;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.meta-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.chip {
  background-color: var(--bg-surface);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.875rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.chip svg {
  width: 14px;
  height: 14px;
  color: var(--accent-primary);
}

.hero-image {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 50%;
  max-width: 600px;
  opacity: 0.8;
  z-index: 1;
}

/* ============================
   Sections & Features
============================ */
.section { padding: var(--section-padding); }

.section-title {
  text-align: center;
  margin-bottom: 4rem;
}

h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background-color: var(--bg-card);
  border-radius: var(--border-radius);
  padding: 2.5rem 2rem;
  transition: all var(--transition-normal);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

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

.feature-card:hover::before { transform: scaleX(1); }

.feature-icon {
  width: 70px;
  height: 70px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}

.feature-icon svg {
  width: 30px;
  height: 30px;
  color: #fff;
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.feature-card p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.feature-link {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: gap var(--transition-fast);
}

.feature-link:hover { gap: 0.75rem; }

/* ============================
   Why Choose
============================ */
.why-choose {
  background-color: var(--bg-surface);
  border-radius: var(--border-radius-lg);
  padding: 5rem 4rem;
  position: relative;
  overflow: hidden;
}

.why-choose::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: radial-gradient(ellipse at top right, rgba(59, 130, 246, 0.1), transparent 70%);
}

.checklist {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
  position: relative;
  z-index: 2;
}

.check-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border-radius: 12px;
  transition: background-color var(--transition-fast);
}

.check-item:hover { background-color: rgba(255, 255, 255, 0.03); }

.check-icon {
  color: var(--success);
  flex-shrink: 0;
  background-color: rgba(34, 197, 94, 0.1);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ============================
   Pricing
============================ */
.pricing-toggle {
  display: flex;
  justify-content: center;
  margin: 2rem 0 3rem;
  background-color: var(--bg-surface);
  padding: 0.5rem;
  border-radius: 12px;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

.toggle-option {
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.toggle-option.active {
  background-color: var(--accent-primary);
  color: #fff;
}

.pricing-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.pricing-card {
  background-color: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: 3rem 2.5rem;
  position: relative;
  transition: all var(--transition-normal);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent-primary);
}

.pricing-card.recommended {
  border: 1px solid var(--accent-primary);
  box-shadow: 0 0 0 1px var(--accent-primary), var(--shadow-lg);
}

.recommended-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #fff;
  padding: 0.5rem 1.5rem;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 600;
}

.pricing-header {
  text-align: center;
  margin-bottom: 2rem;
}

.price {
  font-size: 3rem;
  font-weight: 700;
  margin: 1rem 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
}

.price-period {
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 500;
}

.pricing-features {
  list-style: none;
  margin-bottom: 2.5rem;
  flex-grow: 1;
}

.pricing-features li {
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pricing-features svg {
  color: var(--success);
  flex-shrink: 0;
}

.pricing-features .disabled { color: var(--text-muted); }
.pricing-features .disabled svg { color: var(--text-muted); }

/* ============================
   System Requirements
============================ */
.requirements {
  background-color: var(--bg-surface);
  border-radius: var(--border-radius);
  padding: 3rem;
  margin-top: 4rem;
}

.requirements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.requirement-item {
  text-align: center;
  padding: 1.5rem;
  border-radius: 12px;
  transition: background-color var(--transition-fast);
}

.requirement-item:hover { background-color: rgba(255, 255, 255, 0.03); }

.requirement-value {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--accent-primary);
}

.requirement-label {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ============================
   Testimonials
============================ */
.testimonials {
  background-color: var(--bg-surface);
  padding: 5rem 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.testimonial-card {
  background-color: var(--bg-card);
  border-radius: var(--border-radius);
  padding: 2rem;
  border: 1px solid var(--border);
  transition: all var(--transition-normal);
}

.testimonial-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-light);
}

.testimonial-content {
  font-style: italic;
  margin-bottom: 1.5rem;
  color: var(--text-light);
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.author-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 600;
}

.author-info h4 {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.author-info p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ============================
   Final CTA
============================ */
.final-cta {
  text-align: center;
  padding: 5rem 0;
  background: radial-gradient(ellipse at center, rgba(59, 130, 246, 0.1), transparent 70%);
}

.final-cta h2 { margin-bottom: 1.5rem; }

.final-cta p {
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 2rem;
  font-size: 1.125rem;
}

.trust-badges {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.trust-badge svg { color: var(--success); }

/* ============================
   Footer
============================ */
footer {
  background-color: var(--bg-surface);
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 2fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.footer-logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 10px;
}

.footer-logo-icon svg {
  width: 22px;
  height: 22px;
  color: #fff;
}

.footer-logo-text {
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.footer-logo-text span { color: var(--accent-primary); }

.footer-description {
  color: var(--text-muted);
  max-width: 320px;
  line-height: 1.7;
}

.footer-column h4 {
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

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

.footer-links li { margin-bottom: 0.75rem; }

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

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

.footer-links a svg {
  width: 14px;
  height: 14px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.footer-links a:hover svg { opacity: 1; }

.footer-newsletter h4 { margin-bottom: 1rem; }

.newsletter-text {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.newsletter-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
}

.form-input {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background-color: var(--bg-card);
  color: var(--text-primary);
  font-family: var(--font-primary);
  transition: all var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-legal { display: flex; gap: 1.5rem; }

.footer-legal a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

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

.copyright {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.social-links { display: flex; gap: 1rem; }

.social-link {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background-color: var(--accent-primary);
  color: #fff;
  transform: translateY(-2px);
}

/* ============================
   Responsive
============================ */
@media (max-width: 1024px) {
  .hero-image { opacity: 0.3; }
  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .footer-newsletter { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  .hero-cta { flex-direction: column; }
  .why-choose { padding: 3rem 2rem; }
  nav ul { display: none; }
  .mobile-menu-btn { display: block; }
  .features-grid { grid-template-columns: 1fr; }
  .pricing-cards { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero { padding: 8rem 0 4rem; }
  .section { padding: 4rem 0; }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .footer-legal { order: 2; }
  .copyright { order: 3; }
  .social-links {
    order: 1;
    margin-bottom: 1rem;
  }
}
.btn-auth {
  background: #3b82f6;       /* blue background */
  color: #fff;               /* white text */
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.3s ease;
}

.btn-auth:hover {
  background: #2563eb;       /* darker blue on hover */
}