:root{--primary-color: #2563eb;--primary-hover: #1d4ed8;--secondary-color: #64748b;--accent-color: #f59e0b;--background-color: #ffffff;--surface-color: #f8fafc;--text-primary: #1e293b;--text-secondary: #64748b;--border-color: #e2e8f0;--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-size-base: 16px;--line-height-base: 1.5;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--border-radius-sm: .25rem;--border-radius-md: .5rem;--border-radius-lg: 1rem;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1);--transition-base: all .2s ease-in-out}*{margin:0;padding:0;box-sizing:border-box}html{font-size:var(--font-size-base);scroll-behavior:smooth}body{font-family:var(--font-family);line-height:var(--line-height-base);color:var(--text-primary);background-color:var(--background-color);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2;margin-bottom:var(--spacing-md);color:var(--text-primary)}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.75rem}h4{font-size:1.5rem}h5{font-size:1.25rem}h6{font-size:1rem}p{margin-bottom:var(--spacing-md);color:var(--text-secondary)}a{color:var(--primary-color);text-decoration:none;transition:var(--transition-base)}a:hover{color:var(--primary-hover)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:var(--spacing-sm) var(--spacing-lg);border-radius:var(--border-radius-md);font-weight:500;transition:var(--transition-base);cursor:pointer;border:none}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.btn-secondary{background-color:var(--surface-color);color:var(--text-primary)}.btn-secondary:hover{background-color:var(--border-color)}.card{background-color:var(--background-color);border-radius:var(--border-radius-lg);box-shadow:var(--shadow-md);padding:var(--spacing-lg);transition:var(--transition-base)}.card:hover{box-shadow:var(--shadow-lg)}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--spacing-md)}.grid{display:grid;gap:var(--spacing-md)}.grid-cols-2{grid-template-columns:repeat(2,1fr)}.grid-cols-3{grid-template-columns:repeat(3,1fr)}.grid-cols-4{grid-template-columns:repeat(4,1fr)}@media (max-width: 768px){html{font-size:14px}.grid-cols-2,.grid-cols-3,.grid-cols-4{grid-template-columns:1fr}}.text-center{text-align:center}.text-right{text-align:right}.text-left{text-align:left}.mt-1{margin-top:var(--spacing-xs)}.mt-2{margin-top:var(--spacing-sm)}.mt-3{margin-top:var(--spacing-md)}.mt-4{margin-top:var(--spacing-lg)}.mt-5{margin-top:var(--spacing-xl)}.mb-1{margin-bottom:var(--spacing-xs)}.mb-2{margin-bottom:var(--spacing-sm)}.mb-3{margin-bottom:var(--spacing-md)}.mb-4{margin-bottom:var(--spacing-lg)}.mb-5{margin-bottom:var(--spacing-xl)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.fade-in{animation:fadeIn .3s ease-in-out}