*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f5f7fa;color:#333;line-height:1.6}#root,.app{min-height:100vh;display:flex;flex-direction:column}.container{max-width:1200px;margin:0 auto;padding:0 20px;width:100%}.header{background:#fff;box-shadow:0 2px 8px #0000001a;position:sticky;top:0;z-index:100}.header-content{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 0}.logo{font-size:1.75rem;font-weight:700;color:#2c3e50}.nav{display:flex;gap:1.5rem;max-width:600px;margin:0 auto;justify-content:center;align-items:center}.nav-link{display:flex;align-items:center;gap:.5rem;text-decoration:none;color:#666;font-weight:500;transition:all .3s;padding:.5rem 1rem;border-radius:8px;position:relative}.nav-link:hover{color:#3498db}.nav-link.active{color:#3498db;background:#e3f2fd}.nav-icon{display:none}.fav-count{font-weight:700}@media(max-width:750px){.nav-text{display:none}.nav-icon{display:block}.nav-link{padding:.5rem}.logo{font-size:1.2rem;font-weight:500;color:#2c3e50}}.main{flex:1;padding:2rem 0}.page-header{text-align:center;margin-bottom:2rem}.page-header h2{font-size:2.25rem;color:#2c3e50;margin-bottom:.5rem}.page-header p{color:#666;font-size:1.1rem}.search-filter-container{display:flex;align-items:center;justify-content:center;gap:1rem}@media(max-width:768px){.search-filter-container{display:block;align-items:center;justify-content:center}}.search-input{width:100%;padding:1rem 1.5rem;border:2px solid #e0e0e0;border-radius:12px;font-size:1rem;transition:border-color .3s,box-shadow .3s;background:#fff}.search-input:focus{outline:none;border-color:#3498db;box-shadow:0 0 0 3px #3498db33}.filters{display:flex;gap:1rem;margin-bottom:2rem;flex-wrap:wrap}.filter-group{flex:1;min-width:200px}.filter-group label{display:block;margin-bottom:.5rem;font-weight:500;color:#555}.filter-select{width:100%;padding:.75rem 1rem;border:2px solid #e0e0e0;border-radius:8px;font-size:1rem;background:#fff;cursor:pointer;transition:border-color .3s,box-shadow .3s}.filter-select:focus{outline:none;border-color:#3498db;box-shadow:0 0 0 3px #3498db33}.results-info{margin-bottom:1.5rem;color:#666;font-weight:500}.country-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:2rem;margin-bottom:2rem}.country-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 12px #00000014;transition:transform .3s,box-shadow .3s;cursor:pointer;position:relative}.country-card:hover{transform:translateY(-5px);box-shadow:0 6px 20px #00000026}.country-flag{width:100%;height:180px;object-fit:cover}.country-info{padding:1.5rem}.country-name{font-size:1.25rem;color:#2c3e50;margin-bottom:1rem}.country-details p{margin-bottom:.5rem;color:#555}.country-details strong{color:#333;font-weight:600}.favorite-btn{position:absolute;top:10px;right:10px;background:#fff;border:none;border-radius:50%;width:40px;height:40px;font-size:1.3rem;cursor:pointer;box-shadow:0 2px 10px #0003;transition:transform .2s,color .3s;z-index:10}.favorite-btn:hover{transform:scale(1.1);color:#e74c3c}.favorite-btn.active{color:#e74c3c;animation:heartbeat .3s}@keyframes heartbeat{0%,to{transform:scale(1)}50%{transform:scale(1.2)}}.loading,.error,.no-results,.empty-state{text-align:center;padding:3rem 1rem}.spinner{border:4px solid #f3f3f3;border-top:4px solid #3498db;border-radius:50%;width:50px;height:50px;animation:spin 1s linear infinite;margin:0 auto 1rem}.spinner-small{border:3px solid #f3f3f3;border-top:3px solid #3498db;border-radius:50%;width:30px;height:30px;animation:spin 1s linear infinite;margin:0 auto .5rem}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.load-more{text-align:center;margin:2rem 0}.btn{padding:.75rem 2rem;border:none;border-radius:8px;font-size:1rem;font-weight:500;cursor:pointer;transition:all .3s;background:#e0e0e0;color:#333}.btn:hover{background:#d0d0d0}.btn-primary{background:#3498db;color:#fff}.btn-primary:hover{background:#2980b9}.btn-back{margin-bottom:1.5rem;background:#fff;border:2px solid #e0e0e0}.btn-back:hover{border-color:#3498db;color:#3498db}.country-details-page{background:#fff;border-radius:12px;padding:2rem;box-shadow:0 2px 12px #00000014}.details-header{display:flex;flex-direction:column;gap:2rem;margin-bottom:2rem;align-items:center}@media(min-width:768px){.details-header{flex-direction:row;align-items:flex-start}}.details-flag{width:100%;max-width:300px;height:auto;border-radius:8px;box-shadow:0 2px 12px #00000014}.details-title h1{font-size:2.5rem;color:#2c3e50;margin-bottom:.5rem}.official-name{color:#666;font-size:1.1rem;margin-bottom:1rem}.favorite-btn-large{padding:.75rem 1.5rem;border:none;border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;background:#3498db;color:#fff;transition:all .3s}.favorite-btn-large:hover{background:#2980b9}.details-grid{display:grid;grid-template-columns:1fr;gap:2rem}@media(min-width:768px){.details-grid{grid-template-columns:1fr 1fr}}.details-section{background:#f9fafc;padding:1.5rem;border-radius:12px}.details-section h3{font-size:1.25rem;margin-bottom:1rem;color:#2c3e50}.detail-item{display:flex;justify-content:space-between;margin-bottom:.5rem;color:#555}