:root{--primary-color:#0070f3}body,html{margin:0;padding:0;font-size:16px;background-color:#333;color:#fff}.container{max-width:1100px;margin:0 auto;padding:0 1rem}.btn{display:inline-block;background-color:var(--primary-color);color:#fff;padding:.5rem 1rem;border:none;border-radius:4px;font-size:1rem;cursor:pointer;text-decoration:none}.btn:hover{background-color:#0058b7;color:#fff}.btn-back{display:inline-block;background-color:#f4f4f4;color:#333;padding:.5rem 1rem;border:none;border-radius:4px;font-size:.8rem;cursor:pointer;text-decoration:none;margin-bottom:1.3rem}.header{display:flex;justify-content:center;align-items:center;background-color:#0047ab;color:#fff;padding:1rem;border-bottom:5px solid #fff}.active{text-decoration:underline!important}.logo{text-align:center;margin-bottom:.5rem}.logo a{font-size:1.5rem;font-weight:700}.links a,.logo a{color:#fff;text-decoration:none}.links a{margin:0 .5rem}.links a:hover{text-decoration:underline}.search-form{display:flex;align-items:center}.search-input{flex-grow:1;padding:.8rem;border:0;border-radius:4px;font-size:1rem;margin:2px}.search-button{padding:.7rem 1rem;margin-left:.5rem;background-color:var(--primary-color);color:#fff;border:none;border-radius:4px;font-size:1rem;cursor:pointer}.search-button:hover{background-color:#0058b7}.search-button:focus,.search-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px rgba(0,112,243,.2)}.repos-container{max-width:800px;margin:0 auto;padding:2rem 0}.repo-list{list-style:none;margin:0;padding:0}.repo-list li{margin:2rem 0}.repo-list a{display:block;background-color:#fff;color:#333;padding:1rem;border-radius:4px;text-decoration:none;box-shadow:0 2px 4px rgba(0,0,0,.1);transition:all .3s ease-in-out}.repo-list a:hover{transform:translateY(-5px);box-shadow:0 5px 10px rgba(0,0,0,.2)}.repo-list h3{margin:0;font-size:1.5rem}.repo-list p{margin:0;color:#666;font-size:1.2rem}.repo-details{display:flex;justify-content:space-between;margin-top:1rem;color:#999}.repo-details span{display:flex;align-items:center}.repo-details svg{margin-right:.5rem}.loader{display:flex;justify-content:center;align-items:center;height:100vh}.spinner{border:4px solid rgba(0,0,0,.1);border-left-color:blue;border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite}.card{border:1px solid #ccc;border-radius:4px;padding:1rem;margin:1rem;background-color:#fff;color:#333}.card h2{font-size:1.5rem;margin-top:0}.card .card-content{margin-top:1rem}.card .card-stats{display:flex;margin:1rem 0}.card .card-stat{display:flex;align-items:center;margin-right:1rem}.card .card-stat svg{margin-right:.5rem}.card .card-stat span{font-size:.9rem}.courses .card h2{margin-bottom:0}@keyframes spin{to{transform:rotate(1turn)}}