*{box-sizing:border-box;margin:0;padding:0}:root{--color-primary:#2c3e50;--color-secondary:#34495e;--color-accent:#3498db;--color-text:#333;--color-text-light:#666;--color-bg:#fff;--color-bg-light:#f8f9fa;--color-border:#e0e0e0;--spacing-xs:.5rem;--spacing-sm:1rem;--spacing-md:1.5rem;--spacing-lg:2rem;--spacing-xl:3rem;--border-radius:8px;--shadow:0 2px 8px rgba(0,0,0,.1);--shadow-lg:0 4px 16px rgba(0,0,0,.15)}body{background-color:var(--color-bg);color:var(--color-text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6}.container{margin:0 auto;max-width:1200px;padding:0 var(--spacing-md)}.btn{background-color:var(--color-accent);border:none;border-radius:var(--border-radius);color:#fff;cursor:pointer;display:inline-block;font-size:1rem;padding:var(--spacing-sm) var(--spacing-md);text-decoration:none;transition:background-color .3s ease}.btn:hover{background-color:#2980b9}.btn-secondary{background-color:var(--color-secondary)}.btn-secondary:hover{background-color:#2c3e50}.btn-outline{background-color:transparent;border:2px solid var(--color-accent);color:var(--color-accent)}.btn-outline:hover{background-color:var(--color-accent);color:#fff}.card{background:#fff;border-radius:var(--border-radius);box-shadow:var(--shadow);padding:var(--spacing-lg);transition:transform .3s ease,box-shadow .3s ease}.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}.section{padding:var(--spacing-xl) 0}.section-title{color:var(--color-primary);font-size:2.5rem;margin-bottom:var(--spacing-lg);text-align:center}.section-subtitle{color:var(--color-text-light);font-size:1.25rem;margin-bottom:var(--spacing-xl);text-align:center}img{display:block;height:auto;max-width:100%}.image-placeholder{align-items:center;background:var(--color-bg-light);color:var(--color-text-light);display:flex;font-style:italic;justify-content:center}.image-placeholder:before{content:"Image placeholder"}@media(max-width:768px){.section-title{font-size:2rem}.container{padding:0 var(--spacing-sm)}}