*{box-sizing:border-box;margin:0;padding:0}:root{--app-height:100vh}html,body,#root{height:var(--app-height,100%);min-height:var(--app-height,100%)}@supports (-webkit-touch-callout:none){:root{--app-height:-webkit-fill-available}html,body,#root{height:var(--app-height);min-height:var(--app-height)}}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overscroll-behavior-y:contain;overscroll-behavior-x:none;background:#f5f7fa;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;overflow:hidden}#root{flex-direction:column;display:flex;overflow:hidden}.app-container{flex:1;justify-content:center;align-items:center;padding:20px;display:flex}.auth-card{backdrop-filter:blur(10px);background:#fffffff2;border-radius:16px;width:100%;max-width:450px;padding:40px;box-shadow:0 8px 32px #0000001a}.main-card{backdrop-filter:blur(10px);background:#fffffff2;border-radius:16px;width:100%;max-width:800px;padding:40px;box-shadow:0 8px 32px #0000001a}.form-container{width:100%}.form-title{color:#333;text-align:center;margin-bottom:8px;font-size:28px;font-weight:700}.form-subtitle{color:#666;text-align:center;margin-bottom:32px;font-size:14px}.input-group{margin-bottom:20px}.input-label{color:#444;margin-bottom:8px;font-size:14px;font-weight:600;display:block}.input-field{background:#fff;border:2px solid #e0e0e0;border-radius:8px;width:100%;padding:12px 16px;font-size:16px;transition:all .3s}.input-field:focus{border-color:#667eea;outline:none;box-shadow:0 0 0 3px #667eea1a}.input-error{border-color:#f44336}.error-message{color:#f44336;margin-top:6px;font-size:13px;display:block}.btn{cursor:pointer;text-transform:uppercase;letter-spacing:.5px;border:none;border-radius:8px;width:100%;padding:14px 24px;font-size:16px;font-weight:600;transition:all .3s}.btn-primary{color:#fff;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);box-shadow:0 4px 15px #667eea66}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #667eea80}.btn-primary:active{transform:translateY(0)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn-secondary{color:#667eea;background:0 0;border:2px solid #667eea}.btn-secondary:hover{color:#fff;background:#667eea}.btn-text{color:#667eea;text-align:center;background:0 0;margin-top:16px;padding:8px;font-size:14px;text-decoration:none;display:block}.btn-text:hover{text-decoration:underline}.loading-container{justify-content:center;align-items:center;min-height:200px;display:flex}.spinner{border:4px solid #667eea4d;border-top-color:#667eea;border-radius:50%;width:40px;height:40px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.app-header{background:#fffffff2;justify-content:space-between;align-items:center;padding:20px 40px;display:flex;box-shadow:0 2px 10px #0000001a}.app-title{color:#667eea;font-size:24px;font-weight:700}.user-info{align-items:center;gap:16px;display:flex}.user-name{color:#333;font-size:16px;font-weight:600}.groups-container{padding:40px}.welcome-section{text-align:center;margin-bottom:40px}.welcome-title{color:#333;margin-bottom:8px;font-size:32px;font-weight:700}.welcome-subtitle{color:#666;font-size:18px}.groups-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px;margin-top:32px;display:grid}.group-card{cursor:pointer;background:#fff;border-radius:12px;padding:24px;transition:all .3s;box-shadow:0 2px 8px #00000014}.group-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px #00000026}.group-name{color:#333;margin-bottom:8px;font-size:20px;font-weight:600}.group-description{color:#666;font-size:14px;line-height:1.5}.alert{border-radius:8px;margin-bottom:20px;padding:12px 16px;font-size:14px;font-weight:500}.alert-error{color:#c62828;background:#ffebee;border-left:4px solid #f44336}.alert-success{color:#2e7d32;background:#e8f5e9;border-left:4px solid #4caf50}.alert-info{color:#1565c0;background:#e3f2fd;border-left:4px solid #2196f3}@media (width<=768px){.auth-card,.main-card{margin:16px;padding:24px}.form-title{font-size:24px}.app-header{padding:16px 24px}.groups-grid{grid-template-columns:1fr}}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:.5s ease-out fadeIn}.text-center{text-align:center}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:32px}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.mb-4{margin-bottom:32px}.flex{display:flex}.flex-center{justify-content:center;align-items:center;display:flex}.gap-1{gap:8px}.gap-2{gap:16px}.gap-3{gap:24px}