*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; font-family: 'Rubik', sans-serif; background: #f9fafb; color: #111827; }
a { color: inherit; text-decoration: none; }

.max-w-5xl { max-width: 64rem; }
.max-w-none { max-width: none; }
.mx-auto { margin-left: auto; margin-right: auto; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.py-1 { padding-top: .25rem; padding-bottom: .25rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.py-10 { padding-top: 2.5rem; padding-bottom: 2.5rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.py-20 { padding-top: 5rem; padding-bottom: 5rem; }
.px-3 { padding-left: .75rem; padding-right: .75rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.pr-4 { padding-right: 1rem; }

.mb-2 { margin-bottom: .5rem; }
.mb-3 { margin-bottom: .75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-10 { margin-bottom: 2.5rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-16 { margin-top: 4rem; }

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.inline-flex { display: inline-flex; }
.inline-block { display: inline-block; }
.gap-2 { gap: .5rem; }
.gap-6 { gap: 1.5rem; }
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }

.sticky { position: sticky; }
.top-0 { top: 0; }
.z-10 { z-index: 10; }

.text-center { text-align: center; }
.text-xs { font-size: .75rem; line-height: 1rem; }
.text-sm { font-size: .875rem; line-height: 1.25rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
.text-4xl { font-size: 2.25rem; line-height: 2.5rem; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.leading-tight { line-height: 1.25; }
.leading-relaxed { line-height: 1.7; }

.text-gray-400 { color: #9ca3af; }
.text-gray-500 { color: #6b7280; }
.text-gray-600 { color: #4b5563; }
.text-gray-900 { color: #111827; }
.text-indigo-600 { color: #4f46e5; }
.text-indigo-700 { color: #4338ca; }
.bg-white { background-color: #fff; }
.bg-gray-50 { background-color: #f9fafb; }
.bg-indigo-50 { background-color: #eef2ff; }
.border { border-width: 1px; border-style: solid; border-color: #f3f4f6; }
.border-b { border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: #e5e7eb; }
.border-t { border-top-width: 1px; border-top-style: solid; border-top-color: #e5e7eb; }
.border-gray-100 { border-color: #f3f4f6; }
.border-gray-200 { border-color: #e5e7eb; }
.border-indigo-100 { border-color: #e0e7ff; }
.border-indigo-500 { border-color: #6366f1; }
.border-r-4 { border-right-width: 4px; border-right-style: solid; }
.rounded-2xl { border-radius: 1rem; }
.rounded-full { border-radius: 9999px; }
.shadow-sm { box-shadow: 0 1px 2px 0 rgba(0,0,0,0.05); }
.transition-colors { transition: color .15s ease; }
.transition-shadow { transition: box-shadow .15s ease; }

a.hover-indigo-600:hover, .hover\:text-indigo-600:hover { color: #4f46e5; }
.hover\:text-indigo-800:hover { color: #3730a3; }
.hover\:shadow-md:hover { box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); }

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:p-12 { padding: 3rem; }
  .md\:text-4xl { font-size: 2.25rem; line-height: 2.5rem; }
}

.prose h2 { font-size: 1.5rem; font-weight: 700; margin-top: 2rem; margin-bottom: .75rem; color: #1f2937; }
.prose h3 { font-size: 1.2rem; font-weight: 600; margin-top: 1.5rem; margin-bottom: .5rem; color: #374151; }
.prose p { margin-bottom: 1rem; line-height: 1.8; color: #374151; }
.prose ul { list-style-type: disc; padding-right: 1.5rem; margin-bottom: 1rem; }
.prose li { margin-bottom: .4rem; line-height: 1.7; color: #374151; }