.alert-dialog-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:2000;padding:20px}.alert-dialog{background:#fff;border-radius:12px;box-shadow:0 10px 40px #0000004d;max-width:400px;width:100%;padding:24px}.alert-dialog-title{margin:0 0 12px;font-size:20px;color:#1a202c;font-weight:700}.alert-dialog-message{margin:0 0 24px;font-size:15px;color:#4a5568;line-height:1.5}.alert-dialog-actions{display:flex;justify-content:flex-end}.alert-dialog-btn{padding:10px 24px;border-radius:6px;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;border:none;background:#667eea;color:#fff}.alert-dialog-btn:hover{background:#5568d3}@media(max-width:768px){.alert-dialog-overlay{padding:16px}.alert-dialog{max-width:100%;padding:20px}.alert-dialog-title{font-size:18px}.alert-dialog-message{font-size:14px}.alert-dialog-btn{width:100%;padding:12px 16px;font-size:15px;min-height:44px}}.username-screen{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);padding:20px}.username-card{background:#fff;padding:40px;border-radius:12px;box-shadow:0 10px 40px #0003;max-width:400px;width:100%;text-align:center}.app-logo{font-size:64px;margin-bottom:16px;animation:slideDown .6s ease-out}@keyframes slideDown{0%{transform:translateY(-20px);opacity:0}to{transform:translateY(0);opacity:1}}.username-card h1{margin:0 0 10px;font-size:32px;color:#1a202c;font-weight:700}.username-card p{margin:0 0 30px;color:#718096;font-size:14px}.username-card form{display:flex;flex-direction:column;gap:16px}.username-card input{padding:12px 16px;border:2px solid #e2e8f0;border-radius:8px;font-size:16px;transition:border-color .2s}.username-card input:focus{outline:none;border-color:#667eea}.username-card button{padding:12px 24px;background:#667eea;color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:background .2s}.username-card button:hover:not(:disabled){background:#5568d3}.username-card button:disabled{background:#cbd5e0;cursor:not-allowed}.subtitle{font-size:16px;color:#4a5568;margin-bottom:24px}.privacy-notice{margin-top:32px;padding:20px;background:#f7fafc;border:1px solid #e2e8f0;border-radius:8px;text-align:left}.privacy-notice h3{margin:0 0 12px;font-size:18px;color:#1a202c}.privacy-notice p{margin:8px 0;font-size:14px;line-height:1.6;color:#4a5568}.privacy-notice strong{color:#1a202c}.backup-warning{margin-top:16px!important;padding:12px;background:#fffaf0;border:1px solid #fbd38d;border-radius:6px;color:#744210!important;font-size:13px!important}@media(max-width:768px){.username-screen{padding:20px}.username-screen h1{font-size:28px}.username-screen p{font-size:15px}.username-screen input{font-size:16px;padding:14px 18px;min-height:48px}.username-screen button{font-size:16px;padding:14px 20px;min-height:48px}.username-list{gap:10px}.username-card{padding:14px}.username-card span{font-size:15px}.username-card button{padding:10px 18px;font-size:14px;min-height:44px}}.confirm-dialog-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:2000;padding:20px}.confirm-dialog{background:#fff;border-radius:12px;box-shadow:0 10px 40px #0000004d;max-width:400px;width:100%;padding:24px}.confirm-dialog-title{margin:0 0 12px;font-size:20px;color:#1a202c;font-weight:700}.confirm-dialog-message{margin:0 0 24px;font-size:15px;color:#4a5568;line-height:1.5}.confirm-dialog-actions{display:flex;gap:12px;justify-content:flex-end}.confirm-dialog-btn{padding:10px 20px;border-radius:6px;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;border:none}.confirm-dialog-btn.cancel{background:#f7fafc;border:2px solid #e2e8f0;color:#4a5568}.confirm-dialog-btn.cancel:hover{background:#edf2f7;border-color:#cbd5e0}.confirm-dialog-btn.primary{background:#667eea;color:#fff}.confirm-dialog-btn.primary:hover{background:#5568d3}.confirm-dialog-btn.danger{background:#ef4444;color:#fff}.confirm-dialog-btn.danger:hover{background:#dc2626}@media(max-width:768px){.confirm-dialog-overlay{padding:16px}.confirm-dialog{max-width:100%;padding:20px}.confirm-dialog-title{font-size:18px}.confirm-dialog-message{font-size:14px}.confirm-dialog-actions{flex-direction:column-reverse;gap:8px}.confirm-dialog-btn{width:100%;padding:12px 16px;font-size:15px;min-height:44px}}