*{box-sizing:border-box}body{margin:0;padding:0;overflow-x:hidden}:root{--bg-color:#f4f7f6;--card-bg:#fff;--text-color:#2c3e50;--primary-color:#3498db;--shadow:0 4px 6px #0000001a;--radius:8px}body{background-color:var(--bg-color);color:var(--text-color);margin:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.app-container{max-width:1200px;margin:0 auto;padding:20px}header{text-align:center;margin-bottom:40px}header h1{color:var(--primary-color);font-size:2.5rem}.filters{flex-wrap:wrap;justify-content:space-between;gap:20px;margin-bottom:40px;display:flex}.search-input{border-radius:var(--radius);min-width:250px;box-shadow:var(--shadow);border:1px solid #ddd;flex:1;padding:12px 20px;font-size:1rem}.region-select{border-radius:var(--radius);box-shadow:var(--shadow);cursor:pointer;background-color:#fff;border:1px solid #ddd;padding:12px 20px;font-size:1rem}.countries-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:30px;display:grid}.country-card{background-color:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);cursor:pointer;transition:transform .3s;overflow:hidden}.country-card:hover{transform:translateY(-5px)}.country-flag{object-fit:cover;border-bottom:1px solid #eee;width:100%;height:160px}.country-info{padding:20px}.country-info h3{margin-top:0;margin-bottom:15px;font-size:1.25rem}.country-info p{margin:8px 0;font-size:.9rem}.country-details{padding:20px 0}.buttons-container{gap:20px;margin-bottom:60px;display:flex}.back-button,.home-button{background-color:var(--card-bg);box-shadow:var(--shadow);cursor:pointer;color:var(--text-color);border:none;border-radius:4px;padding:10px 25px;font-size:1rem;text-decoration:none;transition:background-color .2s;display:inline-block}.back-button:hover,.home-button:hover{background-color:#f0f0f0}.details-content{flex-wrap:wrap;align-items:center;gap:80px;display:flex}.details-flag{min-width:300px;max-width:560px;box-shadow:var(--shadow);border-radius:4px;flex:1}.details-text{flex:1;min-width:300px}.details-text h2{margin-top:0;margin-bottom:30px;font-size:2rem}.details-grid{flex-wrap:wrap;gap:40px;margin-bottom:40px;display:flex}.details-col p{margin:10px 0}.borders{flex-wrap:wrap;align-items:center;gap:15px;display:flex}.border-list{flex-wrap:wrap;gap:10px;display:flex}.border-tag{background-color:var(--card-bg);box-shadow:var(--shadow);cursor:pointer;border-radius:3px;padding:5px 15px;font-size:.8rem;transition:background-color .2s}.border-tag:hover{background-color:#f0f0f0}.no-results,.error-message{text-align:center;grid-column:1/-1;margin-top:40px;font-size:1.2rem}.error-message{color:#e74c3c}@media (width<=600px){.filters{flex-direction:column}.search-input,.region-select{width:100%}}.loader-container{justify-content:center;align-items:center;width:100%;height:200px;display:flex}.spinner{border:5px solid #f3f3f3;border-top-color:#3498db;border-radius:50%;width:50px;height:50px;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.not-found-container{text-align:center;flex-direction:column;justify-content:center;align-items:center;height:60vh;padding:20px;display:flex}.not-found-container h1{color:#2b3945;margin:0;font-size:6rem}.not-found-container h2{margin:10px 0;font-size:2rem}.not-found-container p{color:#858585;margin-bottom:30px;font-size:1.1rem}.back-home-link{color:#fff;background-color:#2b3945;border-radius:5px;padding:10px 20px;text-decoration:none;transition:transform .2s ease-in-out;display:inline-block;box-shadow:0 0 7px #0003}.back-home-link:hover{transform:scale(1.05)}