:root{--bg-color:#0f172a;--text-color:#f8fafc;--primary-color:#3b82f6;--primary-hover:#2563eb;--card-bg:#1e293bb3;--border-color:#ffffff1a;--danger-color:#ef4444;--success-color:#10b981}*{box-sizing:border-box;margin:0;padding:0;font-family:Inter,Segoe UI,Tahoma,Geneva,Verdana,sans-serif}body{background-color:var(--bg-color);color:var(--text-color);-webkit-font-smoothing:antialiased;justify-content:center;align-items:center;min-height:100vh;display:flex}#root{background:radial-gradient(circle at 100% 0,#1e293b,#0f172a);width:100%;max-width:480px;min-height:100vh;position:relative;overflow-x:hidden}.glass-panel{background:var(--card-bg);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:16px;padding:24px}.btn{background-color:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;width:100%;padding:12px 20px;font-size:16px;font-weight:600;transition:all .2s;display:flex}.btn:hover{background-color:var(--primary-hover);transform:translateY(-2px)}.btn:active{transform:translateY(0)}.btn-icon{color:var(--text-color);cursor:pointer;background:0 0;border:none;border-radius:50%;padding:8px;transition:all .2s}.btn-icon:hover{background:#ffffff1a}.input-group{margin-bottom:16px}.input-group label{color:#94a3b8;margin-bottom:8px;font-size:14px;display:block}.input-control{border:1px solid var(--border-color);color:#fff;background:#0f172a99;border-radius:8px;outline:none;width:100%;padding:12px 16px;font-size:16px;transition:border-color .2s}.input-control:focus{border-color:var(--primary-color)}@keyframes slideIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.animate-slide-up{animation:.4s forwards slideIn}.login-container{flex-direction:column;justify-content:center;min-height:100vh;padding:24px;display:flex}.login-container h1{text-align:center;background:linear-gradient(90deg,#60a5fa,#a78bfa);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:32px;font-size:32px}.error-message{color:var(--danger-color);text-align:center;margin-bottom:16px;font-size:14px}.app-container{flex-direction:column;min-height:100vh;padding:24px 16px;display:flex}.app-header{justify-content:space-between;align-items:center;margin-bottom:32px;padding-top:12px;display:flex}.app-header h1{font-size:24px;font-weight:700}.logout-btn{border:1px solid var(--border-color);color:#94a3b8;cursor:pointer;background:0 0;border-radius:20px;padding:6px 12px;font-size:12px;transition:all .2s}.logout-btn:hover{color:#fff;background:#ffffff0d}.add-task-form{margin-bottom:24px}.add-task-form .input-group{margin-bottom:8px}.task-list{flex-direction:column;gap:12px;padding-bottom:40px;display:flex}.task-item{background:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;align-items:flex-start;padding:16px;transition:all .3s;display:flex;position:relative;overflow:hidden}.task-item.completed{opacity:.6}.task-item.completed:before{content:"";background-color:var(--success-color);width:4px;position:absolute;top:0;bottom:0;left:0}.task-checkbox{appearance:none;border:2px solid var(--primary-color);cursor:pointer;border-radius:50%;flex-shrink:0;width:24px;height:24px;margin-right:16px;transition:all .2s;position:relative}.task-checkbox:checked{background-color:var(--primary-color)}.task-checkbox:checked:after{content:"✓";color:#fff;font-size:14px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.task-content{flex-grow:1}.task-title{margin-bottom:4px;font-size:16px;font-weight:600;transition:color .2s}.task-item.completed .task-title{color:#94a3b8;text-decoration:line-through}.task-desc{color:#94a3b8;font-size:13px;line-height:1.4}.delete-btn{color:var(--danger-color);opacity:.5}.delete-btn:hover{opacity:1;background:#ef44441a}.empty-state{text-align:center;color:#94a3b8;padding:40px 20px}