:root{--primary-color: #0052cc;--background-color: #ffffff;--text-color: #172b4d;--border-color: #dfe1e6;--error-color: #de350b;--success-color: #00875a}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background-color:var(--background-color);color:var(--text-color);line-height:1.6}.container{max-width:800px;margin:0 auto;padding:20px}.header{text-align:center;margin-bottom:40px;padding:20px 0;border-bottom:2px solid var(--border-color)}.header h1{color:var(--primary-color);font-size:2.5rem;margin-bottom:10px}.subtitle{color:#5e6c84;font-size:1.1rem}.loading{text-align:center;padding:40px;color:#5e6c84}.registration-form{max-width:400px;margin:40px auto;padding:30px;background:#f4f5f7;border-radius:8px}.registration-form h2{margin-bottom:10px;color:var(--primary-color)}.registration-form p{margin-bottom:20px;color:#5e6c84}.registration-form form{display:flex;flex-direction:column;gap:15px}.registration-form input{padding:12px;border:2px solid var(--border-color);border-radius:4px;font-size:1rem}.registration-form input:focus{outline:none;border-color:var(--primary-color)}.registration-form button{padding:12px;background-color:var(--primary-color);color:#fff;border:none;border-radius:4px;font-size:1rem;font-weight:600;cursor:pointer;transition:background-color .2s}.registration-form button:hover{background-color:#0747a6}.notifications{padding:20px 0}.notifications h2{margin-bottom:20px;color:var(--primary-color)}.empty-state{text-align:center;padding:40px;color:#5e6c84;font-style:italic}#notifications-list{display:flex;flex-direction:column;gap:15px}.error-message,.error-state{color:var(--error-color);padding:10px;margin-top:10px;background-color:#ffebe6;border-radius:4px;font-size:.9rem}.hidden{display:none!important}.form-group{margin-bottom:15px}.notification-permission-info{padding:15px;background-color:#e3fcef;border-radius:4px;margin:15px 0;font-size:.9rem;color:#00875a}.notifications-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;flex-wrap:wrap;gap:15px}.notifications-actions{display:flex;gap:10px;flex-wrap:wrap}button{padding:10px 16px;background-color:var(--primary-color);color:#fff;border:none;border-radius:4px;font-size:.9rem;font-weight:600;cursor:pointer;transition:background-color .2s}button:hover:not(:disabled){background-color:#0747a6}button:disabled{opacity:.5;cursor:not-allowed}.button-secondary{background-color:#f4f5f7;color:var(--text-color);border:1px solid var(--border-color)}.button-secondary:hover:not(:disabled){background-color:#ebecf0}.filter-tabs{display:flex;gap:10px;margin-bottom:20px;border-bottom:2px solid var(--border-color)}.tab{padding:10px 20px;background-color:transparent;color:#5e6c84;border:none;border-bottom:2px solid transparent;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s;margin-bottom:-2px}.tab:hover{color:var(--primary-color);background-color:transparent}.tab.active{color:var(--primary-color);border-bottom-color:var(--primary-color);background-color:transparent}.notification-item{display:flex;gap:15px;padding:15px;background-color:#fff;border:1px solid var(--border-color);border-radius:8px;cursor:pointer;transition:all .2s}.notification-item:hover{box-shadow:0 2px 8px #0000001a;border-color:var(--primary-color)}.notification-item.unread{background-color:#e6fcff;border-left:4px solid var(--primary-color)}.notification-icon{font-size:2rem;flex-shrink:0}.notification-content{flex:1;min-width:0}.notification-header{display:flex;align-items:center;gap:10px;margin-bottom:5px}.notification-title{font-size:1.1rem;font-weight:600;color:var(--text-color);margin:0;flex:1}.unread-badge{padding:2px 8px;background-color:var(--primary-color);color:#fff;border-radius:12px;font-size:.75rem;font-weight:600}.notification-message{color:#5e6c84;margin:5px 0;font-size:.95rem}.notification-meta{display:flex;gap:15px;margin-top:10px;font-size:.85rem;color:#97a0af}.load-more-container{text-align:center;margin-top:30px}@media (max-width: 600px){.header h1{font-size:2rem}.notifications-header{flex-direction:column;align-items:stretch}.notifications-actions{justify-content:space-between}.notification-item{flex-direction:column;gap:10px}.notification-icon{font-size:1.5rem}}