@charset "UTF-8";html{scroll-behavior:smooth}body{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6;color:#333;background-color:#f8f9fa;padding:20px}header,main,section,article,footer{max-width:1200px;margin:0 auto 20px;padding:20px;background:#fff;border-radius:8px;box-shadow:0 2px 4px #0000001a}a,button,input,textarea,select{vertical-align:baseline}img,video{max-width:100%;height:auto;vertical-align:middle}form{max-width:600px;margin:0 auto}label{display:block;margin-bottom:8px;font-weight:500;color:#444}input,textarea,select{box-sizing:border-box;width:100%;padding:8px;margin-bottom:16px;border:1px solid #ddd;border-radius:4px;font-size:16px;transition:border-color .3s ease}input:focus,textarea:focus,select:focus{outline:none;border-color:#007bff;box-shadow:0 0 0 2px #007bff40}button{padding:10px 24px;background-color:#007bff;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:16px;transition:background-color .3s ease}button:hover,button:focus{background-color:#0056b3}.mb-1{margin-bottom:4px}.mb-2{margin-bottom:8px}.mb-3{margin-bottom:16px}.mb-4{margin-bottom:24px}.mt-1{margin-top:4px}.mt-2{margin-top:8px}.mt-3{margin-top:16px}.mt-4{margin-top:24px}.alert{padding:12px 16px;border-radius:4px;margin-bottom:20px}.alert-success{background-color:#d4edda;color:#155724}.alert-error{background-color:#f8d7da;color:#721c24}@media (max-width: 768px){body{padding:10px}header,main,section,article,footer{padding:15px;margin-bottom:15px}input,textarea,select,button{font-size:14px}}.form-group{margin-bottom:24px}.form-actions{display:flex;gap:12px;margin-top:32px}