body,button,h1,h2,input,li,p,select,textarea,ul{margin:0;padding:0;box-sizing:border-box;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol"}body{background-color:#f8f9fa;color:#343a40;line-height:1.6}header{background-color:#fff;padding:15px 30px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 2px 8px rgba(0,0,0,.06);position:sticky;top:0;z-index:1000;border-bottom:1px solid #e9ecef}.logo{font-size:1.5em;font-weight:700;color:#007bff}.search-bar input{padding:10px 15px;border:1px solid #ced4da;border-radius:20px;min-width:280px;transition:border-color .2s,box-shadow .2s}#submitExtensionForm input[type=text]:focus,#submitExtensionForm select:focus,#submitExtensionForm textarea:focus,.search-bar input:focus{outline:0;border-color:#80bdff;box-shadow:0 0 0 .2rem rgba(0,123,255,.25)}.submit-btn{background-color:#007bff;color:#fff;border:none;padding:10px 20px;border-radius:20px;cursor:pointer;transition:background-color .3s,transform .1s;font-weight:500}#submitExtensionForm button[type=submit]:hover,.submit-btn:hover{background-color:#0056b3;transform:translateY(-1px)}#submitExtensionForm button[type=submit]:active,.extension-card .install-btn:active,.submit-btn:active{transform:translateY(0)}.main-container{display:flex;padding:25px;gap:25px}.extension-card,.filters{background-color:#fff;padding:20px}.filters{flex:0 0 220px;border-radius:12px;box-shadow:0 2px 10px rgba(0,0,0,.05);height:fit-content;border:1px solid #e9ecef}.filters h2{font-size:1.2em;margin-bottom:15px;color:#495057;padding-bottom:10px;border-bottom:1px solid #f1f3f5}.filters ul{list-style:none}.filters ul li a{display:block;padding:10px 5px;color:#007bff;text-decoration:none;transition:color .2s,background-color .2s;border-radius:6px}.filters ul li a:hover{color:#0056b3;background-color:#e9ecef}.filters ul li a.active{color:#0056b3;font-weight:700;background-color:#def}.extensions-grid{flex-grow:1;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:25px}.extension-card{border:1px solid #e9ecef;border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,.07);display:flex;flex-direction:column;transition:transform .2s ease-in-out,box-shadow .2s ease-in-out}.extension-card:hover{transform:translateY(-4px);box-shadow:0 6px 16px rgba(0,0,0,.1)}.extension-card img{width:50px;height:50px;object-fit:cover;border-radius:8px;margin-bottom:15px;align-self:flex-start}.extension-card h3{font-size:1.25em;margin-bottom:8px;color:#212529}.extension-card .author-details{display:flex;align-items:baseline;gap:6px;margin-bottom:12px}.extension-card .author{font-size:.85em;color:#6c757d;margin-bottom:0}.extension-card .author-origin{font-size:.8em;color:#868e96;font-style:italic}.extension-card .description{font-size:.9em;color:#495057;margin-bottom:15px;flex-grow:1}.extension-card .tags{margin-bottom:15px}.extension-card .tag{display:inline-block;background-color:#e9ecef;color:#007bff;padding:4px 10px;border-radius:15px;font-size:.75em;font-weight:500;margin-right:5px;margin-bottom:5px}#submitExtensionForm button[type=submit],.extension-card .install-btn{color:#fff;cursor:pointer;font-weight:500;transition:background-color .3s,transform .1s}.extension-card .install-btn{background-color:#28a745;border:none;padding:10px 15px;border-radius:20px;text-align:center;text-decoration:none;margin-top:auto}.extension-card .install-btn:hover{background-color:#218838;transform:translateY(-1px)}footer{text-align:center;padding:25px;background-color:#e9ecef;color:#6c757d;margin-top:30px;font-size:.9em}.modal{display:none;position:fixed;z-index:1001;left:0;top:0;width:100%;height:100%;overflow:auto;background-color:rgba(0,0,0,.4)}.modal-content{background-color:#fff;margin:10% auto;padding:30px;border:1px solid #dee2e6;width:80%;max-width:550px;border-radius:12px;box-shadow:0 5px 20px rgba(0,0,0,.1);position:relative}.close-btn{color:#adb5bd;position:absolute;top:15px;right:20px;font-size:28px;font-weight:700;cursor:pointer;transition:color .2s}.close-btn:focus,.close-btn:hover{color:#495057;text-decoration:none}#submitExtensionForm label{display:block;margin-top:15px;margin-bottom:5px;font-weight:500;color:#495057}#submitExtensionForm input[type=text],#submitExtensionForm select,#submitExtensionForm textarea{width:100%;padding:12px;margin-bottom:15px;border:1px solid #ced4da;border-radius:8px;transition:border-color .2s,box-shadow .2s}#submitExtensionForm textarea{min-height:100px}#submitExtensionForm button[type=submit]{background-color:#007bff;padding:12px 25px;border:none;border-radius:20px}@media (max-width:768px){.main-container{flex-direction:column}.filters{flex:1;margin-bottom:20px}header{flex-direction:column;gap:15px;padding:15px}.search-bar input,.submit-btn{width:100%}.modal-content{margin:5% auto;width:90%}}