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

:root {
  /* Slate Blue Palette */
  --color-primary: #4a6fa5;
  --color-primary-dark: #3d5a87;
  --color-primary-light: #6b8cbe;
  --color-accent: #5d8fca;

  /* Neutrals */
  --color-white: #ffffff;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-gray-700);
  background-color: var(--color-gray-100);
}

/* Container */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Typography */
h1, h2, h3 {
  color: var(--color-gray-800);
  line-height: 1.3;
}

h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

p {
  margin-bottom: var(--space-sm);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 8px;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 2px 8px rgba(74, 111, 165, 0.3);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  box-shadow: 0 4px 12px rgba(74, 111, 165, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  padding: var(--space-3xl) 0 calc(var(--space-3xl) + 40px);
  text-align: center;
  position: relative;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: var(--color-gray-100);
  clip-path: ellipse(60% 100% at 50% 100%);
}

.hero h1 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.hero-subtitle {
  font-size: 1.25rem;
  opacity: 0.95;
  max-width: 600px;
  margin: 0 auto var(--space-lg);
  line-height: 1.6;
}

.hero .btn-primary {
  background-color: var(--color-white);
  color: var(--color-primary);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.hero .btn-primary:hover {
  background-color: var(--color-gray-100);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

/* Sections */
.section {
  padding: var(--space-3xl) 0;
}

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

.section-card {
  background: var(--color-white);
  border-radius: 16px;
  padding: var(--space-2xl) var(--space-xl);
  margin: 0 auto;
  max-width: 800px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.section-dark {
  background: linear-gradient(135deg, var(--color-gray-800) 0%, var(--color-gray-700) 100%);
  color: var(--color-gray-100);
}

.section-dark h2 {
  color: var(--color-white);
}

.section-dark .section-text {
  color: var(--color-gray-200);
}

.section-text {
  font-size: 1.125rem;
  color: var(--color-gray-600);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.section-text:last-of-type {
  margin-bottom: 0;
}

/* Features Grid */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.feature {
  background-color: var(--color-white);
  padding: var(--space-lg);
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--color-gray-200);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.feature:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.feature h3 {
  color: var(--color-primary);
}

.feature p {
  margin-bottom: 0;
  color: var(--color-gray-600);
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.step {
  text-align: center;
  position: relative;
}

.step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 24px;
  right: -16px;
  width: 32px;
  height: 2px;
  background: var(--color-gray-200);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 1.25rem;
  font-weight: 600;
  border-radius: 50%;
  margin-bottom: var(--space-sm);
  box-shadow: 0 4px 12px rgba(74, 111, 165, 0.3);
}

.step h3 {
  color: var(--color-gray-800);
  font-size: 1rem;
}

.step p {
  color: var(--color-gray-600);
  margin-bottom: 0;
  font-size: 0.9375rem;
}

/* Contact Section */
#contact {
  text-align: center;
}

#contact .container {
  max-width: 700px;
}

#contact .section-text {
  margin-bottom: var(--space-lg);
}

#contact .btn-primary {
  background-color: var(--color-accent);
}

#contact .btn-primary:hover {
  background-color: var(--color-primary);
}

/* See It In Action */
.section-action {
  text-align: center;
}

.section-action .btn-secondary {
  margin-top: var(--space-md);
}

/* Audience Section */
.section-audience {
  text-align: center;
  background: var(--color-white);
}

/* Footer */
.footer {
  background-color: var(--color-gray-800);
  color: var(--color-gray-200);
  padding: var(--space-lg) 0;
  text-align: center;
}

.footer p {
  margin-bottom: var(--space-xs);
  font-size: 0.9375rem;
}

.footer-copyright {
  color: var(--color-gray-600);
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* Responsive */
@media (max-width: 900px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .step:nth-child(2)::after {
    display: none;
  }

  .step::after {
    display: none;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.25rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .hero {
    padding: var(--space-2xl) 0 calc(var(--space-2xl) + 30px);
  }

  .hero::after {
    height: 60px;
  }

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

  .section {
    padding: var(--space-2xl) 0;
  }

  .section-card {
    padding: var(--space-xl) var(--space-lg);
    margin: 0 var(--space-sm);
  }

  .section-text {
    font-size: 1rem;
  }

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

  .steps {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.875rem;
  }

  .container,
  .container-narrow {
    padding: 0 var(--space-sm);
  }

  .btn {
    padding: 0.75rem 1.5rem;
  }

  .section-card {
    padding: var(--space-lg);
    border-radius: 12px;
  }
}