:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.5;font-weight:400;--primary-color: #646cff;--primary-hover: #535bf2;--bg-color: #ffffff;--text-color: #213547;--card-bg: #f9f9f9;--border-color: #e0e0e0;--success-color: #4caf50;--error-color: #f44336;--info-color: #2196f3;color-scheme:light;color:var(--text-color);background-color:var(--bg-color);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);padding:2rem 1rem}#app{max-width:1200px;margin:0 auto;background:var(--bg-color);border-radius:16px;box-shadow:0 20px 60px #0000004d;overflow:hidden}header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:2rem;text-align:center}header h1{margin:0 0 .5rem;font-size:2.5rem;font-weight:700}header p{margin:0;opacity:.9;font-size:1.1rem}main{padding:2rem}.products-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem;margin-top:1rem}.product-card{background:var(--card-bg);border-radius:12px;overflow:hidden;transition:transform .3s ease,box-shadow .3s ease;border:1px solid var(--border-color)}.product-card:hover{transform:translateY(-5px);box-shadow:0 10px 30px #00000026}.product-image{width:100%;height:200px;background:linear-gradient(135deg,#f5f7fa,#c3cfe2);display:flex;align-items:center;justify-content:center;overflow:hidden}.product-image img{width:100%;height:100%;object-fit:cover}.placeholder-image{font-size:4rem;opacity:.5}.product-info{padding:1.5rem;text-align:center}.product-info h3{margin:0 0 .5rem;font-size:1.5rem;color:var(--text-color)}.product-price{font-size:1.8rem;font-weight:700;color:var(--primary-color);margin:1rem 0}.buy-button{width:100%;padding:.875rem 1.5rem;font-size:1rem;font-weight:600;color:#fff;background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-hover) 100%);border:none;border-radius:8px;cursor:pointer;transition:all .3s ease;text-transform:uppercase;letter-spacing:.5px}.buy-button:hover{transform:scale(1.05);box-shadow:0 5px 15px #646cff66}.buy-button:active{transform:scale(.98)}.buy-button:focus{outline:2px solid var(--primary-color);outline-offset:2px}footer{background:#f5f5f5;padding:1.5rem;text-align:center;border-top:1px solid var(--border-color)}footer p{margin:0;color:#666}footer a{color:var(--primary-color);text-decoration:none;font-weight:600}footer a:hover{text-decoration:underline}.message{padding:1rem 1.5rem;margin:1rem;border-radius:8px;font-weight:500;animation:slideIn .3s ease}.message-success{background-color:#d4edda;color:#155724;border:1px solid #c3e6cb}.message-error{background-color:#f8d7da;color:#721c24;border:1px solid #f5c6cb}.message-info{background-color:#d1ecf1;color:#0c5460;border:1px solid #bee5eb}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@media(max-width:768px){header h1{font-size:2rem}.products-container{grid-template-columns:1fr;gap:1.5rem}main{padding:1.5rem}body{padding:1rem .5rem}}@media(prefers-color-scheme:dark){:root{--bg-color: #1a1a1a;--text-color: rgba(255, 255, 255, .87);--card-bg: #242424;--border-color: #333}footer{background:#1a1a1a}}