/* Professional CSS Setup imitating Tailwind Utilities */
:root {
    --primary: #1d4ed8; /* blue-700 */
    --primary-light: #3b82f6; /* blue-500 */
    --primary-dark: #1e40af; /* blue-800 */
    --secondary: #0f172a; /* slate-900 */
    --text-main: #0f172a; /* slate-900 */
    --text-muted: #475569; /* slate-600 */
    --text-light: #94a3b8; /* slate-400 */
    --bg-body: #f8fafc; /* slate-50 */
    --bg-white: #ffffff;
    --border: #e2e8f0; /* slate-200 */
    
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-serif: 'Merriweather', serif;
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; font-family: var(--font-sans); background-color: var(--bg-body); color: var(--text-main); line-height: 1.6; }
h1, h2, h3, h4, h5, h6 { line-height: 1.2; margin: 0; font-weight: 700; }
p { margin: 0 0 1em; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }

/* Layout & Display */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 1rem; }
.block { display: block; }
.hidden { display: none; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-grow { flex-grow: 1; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.gap-8 { gap: 2rem; }
.gap-12 { gap: 3rem; }

/* Positioning */
.relative { position: relative; }
.absolute { position: absolute; }
.sticky { position: sticky; }
.fixed { position: fixed; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.top-0 { top: 0; }
.top-24 { top: 6rem; }
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-50 { z-index: 50; }

/* Sizing */
.w-full { width: 100%; }
.h-full { height: 100%; }
.h-auto { height: auto; }
.h-screen { height: 100vh; }
.min-h-screen { min-height: 100vh; }
.h-4 { height: 1rem; } .w-4 { width: 1rem; }
.h-6 { height: 1.5rem; } .w-6 { width: 1.5rem; }
.h-12 { height: 3rem; } .w-12 { width: 3rem; }
.h-16 { height: 4rem; }
.h-56 { height: 14rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-5xl { max-width: 64rem; }
.max-w-6xl { max-width: 72rem; }
.max-w-none { max-width: none; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Typography */
.font-sans { font-family: var(--font-sans); }
.font-serif { font-family: var(--font-serif); }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-black { font-weight: 900; }
.italic { font-style: italic; }
.uppercase { text-transform: uppercase; }
.text-center { text-align: center; }

.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }
.text-4xl { font-size: 2.25rem; }
.text-5xl { font-size: 3rem; }
.text-6xl { font-size: 3.75rem; }
.text-9xl { font-size: 8rem; }

.leading-tight { line-height: 1.25; }
.leading-snug { line-height: 1.375; }
.leading-relaxed { line-height: 1.625; }
.tracking-wide { letter-spacing: 0.025em; }
.tracking-wider { letter-spacing: 0.05em; }
.tracking-widest { letter-spacing: 0.1em; }
.break-all { word-break: break-all; }

/* Colors */
.text-white { color: white; }
.text-slate-300 { color: #cbd5e1; }
.text-slate-400 { color: #94a3b8; }
.text-slate-500 { color: #64748b; }
.text-slate-600 { color: #475569; }
.text-slate-900 { color: #0f172a; }
.text-blue-100 { color: #dbeafe; }
.text-blue-300 { color: #93c5fd; }
.text-blue-400 { color: #60a5fa; }
.text-blue-500 { color: #3b82f6; }
.text-blue-600 { color: #2563eb; }
.text-blue-700 { color: #1d4ed8; }
.text-red-100 { color: #fee2e2; }

.bg-white { background-color: white; }
.bg-transparent { background-color: transparent; }
.bg-slate-50 { background-color: #f8fafc; }
.bg-slate-100 { background-color: #f1f5f9; }
.bg-slate-900 { background-color: #0f172a; }
.bg-blue-50 { background-color: #eff6ff; }
.bg-blue-600 { background-color: #2563eb; }
.bg-blue-900 { background-color: #1e3a8a; }

.border-white { border-color: white; }
.border-slate-100 { border-color: #f1f5f9; }
.border-slate-200 { border-color: #e2e8f0; }
.border-blue-700 { border-color: #1d4ed8; }

/* Spacing Utilities */
.m-0 { margin: 0; } .mb-3 { margin-bottom: 0.75rem; } .mb-4 { margin-bottom: 1rem; } .mb-6 { margin-bottom: 1.5rem; } .mb-8 { margin-bottom: 2rem; } .mb-10 { margin-bottom: 2.5rem; } .mb-12 { margin-bottom: 3rem; } .mb-16 { margin-bottom: 4rem; } .mt-auto { margin-top: auto; } .mt-12 { margin-top: 3rem; } .mt-16 { margin-top: 4rem; } .-mt-12 { margin-top: -3rem; } .-mt-16 { margin-top: -4rem; } .ml-2 { margin-left: 0.5rem; }
.p-4 { padding: 1rem; } .p-6 { padding: 1.5rem; } .p-8 { padding: 2rem; } .p-10 { padding: 2.5rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; } .py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; } .py-4 { padding-top: 1rem; padding-bottom: 1rem; } .py-12 { padding-top: 3rem; padding-bottom: 3rem; } .py-16 { padding-top: 4rem; padding-bottom: 4rem; } .py-20 { padding-top: 5rem; padding-bottom: 5rem; } .py-24 { padding-top: 6rem; padding-bottom: 6rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; } .px-8 { padding-left: 2rem; padding-right: 2rem; } .pl-8 { padding-left: 2rem; }

/* Borders & Effects */
.border { border-width: 1px; border-style: solid; }
.border-t { border-top-width: 1px; border-top-style: solid; }
.border-b { border-bottom-width: 1px; border-bottom-style: solid; }
.border-l { border-left-width: 1px; border-left-style: solid; }
.border-2 { border-width: 2px; }
.border-4 { border-width: 4px; }

.rounded { border-radius: 0.25rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-2xl { border-radius: 1rem; }
.rounded-full { border-radius: 9999px; }

.shadow-lg { box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1); }
.shadow-xl { box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1); }
.shadow-2xl { box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25); }

.opacity-20 { opacity: 0.2; }
.overflow-hidden { overflow: hidden; }
.object-cover { object-fit: cover; }

/* Transitions & Hover */
.transition { transition-property: all; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.duration-300 { transition-duration: 300ms; }
.duration-500 { transition-duration: 500ms; }

.hover\:underline:hover { text-decoration: underline; }
.hover\:bg-white:hover { background-color: white; }
.hover\:bg-blue-500:hover { background-color: #3b82f6; }
.hover\:bg-blue-600:hover { background-color: #2563eb; }
.hover\:bg-blue-700:hover { background-color: #1d4ed8; }
.hover\:text-slate-900:hover { color: #0f172a; }
.hover\:text-blue-300:hover { color: #93c5fd; }
.hover\:text-blue-600:hover { color: #2563eb; }
.hover\:text-blue-700:hover { color: #1d4ed8; }
.hover\:text-blue-800:hover { color: #1e40af; }
.hover\:text-white:hover { color: white; }
.hover\:shadow-xl:hover { box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04); }
.hover\:shadow-2xl:hover { box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25); }

.group:hover .group-hover\:scale-105 { transform: scale(1.05); }

/* Line Clamp */
.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Responsive */
@media (min-width: 640px) {
    .sm\:flex-row { flex-direction: row; }
}

@media (min-width: 768px) {
    .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
    .md\:flex-row { flex-direction: row; }
    .md\:text-xl { font-size: 1.25rem; }
    .md\:text-4xl { font-size: 2.25rem; }
    .md\:text-5xl { font-size: 3rem; }
    .md\:text-6xl { font-size: 3.75rem; }
    .md\:block { display: block; }
    .md\:hidden { display: none; }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
    .lg\:flex-row { flex-direction: row; }
    .lg\:w-3\/4 { width: 75%; }
    .lg\:w-1\/4 { width: 25%; }
    .lg\:pl-8 { padding-left: 2rem; }
    .lg\:mx-0 { margin-left: 0; margin-right: 0; }
    .lg\:block { display: block; }
}

/* Components */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    border-radius: 0.5rem;
    transition: all 0.2s;
    cursor: pointer;
}

/* Prose (Article Content) */
.prose { max-width: 65ch; margin: 0 auto; font-family: var(--font-serif); color: #334155; }
.prose h2 { font-family: var(--font-sans); color: var(--text-main); font-size: 1.8rem; margin-top: 2.5rem; margin-bottom: 1rem; }
.prose h3 { font-family: var(--font-sans); color: var(--text-main); font-size: 1.5rem; margin-top: 2rem; margin-bottom: 0.75rem; }
.prose p { margin-bottom: 1.25em; font-size: 1.125rem; line-height: 1.8; }
.prose ul { list-style-type: disc; padding-left: 1.5em; margin-bottom: 1.25em; }
.prose li { margin-bottom: 0.5em; }
.prose a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.prose blockquote { border-left: 4px solid var(--primary); padding-left: 1em; font-style: italic; color: var(--text-muted); margin: 1.5em 0; }
.prose strong { color: var(--text-main); font-weight: 700; }