:root{--color-primary: #1E90FF;--color-secondary: #6C757D;--color-success: #2ECC71;--color-danger: #E74C3C;--color-warning: #F39C12;--color-background: #FFFFFF;--color-surface: #F8F9FA;--color-sidebar: #FBFBFD;--color-border: #E9ECEF;--color-text-primary: #212529;--color-text-secondary: #6C757D;--color-text-muted: #ADB5BD;--radius-button: 8px;--radius-card: 12px;--radius-input: 8px;--radius-modal: 16px;--radius-sidebar: 20px;--font-main: "Inter", "Noto Sans SC", sans-serif;--shadow-sm: 0 2px 4px rgba(0,0,0,.05);--shadow-md: 0 4px 12px rgba(0,0,0,.08);--shadow-lg: 0 8px 24px rgba(0,0,0,.12);--shadow-sidebar: 4px 0 24px rgba(0,0,0,.05);--shadow-hover: 0 8px 32px rgba(0,0,0,.12);--sidebar-width: 320px;--topbar-height: 64px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-main);font-size:14px;line-height:1.6;color:var(--color-text-primary);background-color:var(--color-surface);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{min-height:100vh;width:100%}.app{display:flex;flex-direction:column;height:100vh;background-color:var(--color-background);overflow:hidden}.topbar{height:var(--topbar-height);background:linear-gradient(135deg,var(--color-background) 0%,var(--color-surface) 100%);border-bottom:1px solid var(--color-border);padding:0 32px;display:flex;align-items:center;position:relative;z-index:1000;box-shadow:var(--shadow-sm)}.topbar-content{width:100%;display:flex;justify-content:space-between;align-items:center}.topbar-actions{display:flex;align-items:center;gap:8px}.topbar-logo{display:flex;align-items:center;gap:12px}.logo-icon{width:32px;height:32px;animation:pulse 2s infinite}.logo-text{font-size:24px;font-weight:700;background:linear-gradient(135deg,#7c7cff,#92a2ff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.5px}.current-time{font-size:14px;color:var(--color-text-secondary);font-weight:500;padding:8px 0}.avatar-link{display:flex;align-items:center;text-decoration:none;transition:all .3s ease}.avatar{width:40px;height:40px;border-radius:50%;object-fit:cover;border:2px solid var(--color-border);transition:all .3s ease;box-shadow:var(--shadow-sm)}.avatar-link:hover .avatar{border-color:var(--color-primary);transform:scale(1.05);box-shadow:var(--shadow-md)}.app-layout{display:flex;flex:1;overflow:hidden}.sidebar{width:var(--sidebar-width);background:linear-gradient(180deg,var(--color-sidebar) 0%,var(--color-surface) 100%);border-right:1px solid var(--color-border);padding:32px 24px 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ease}.stat-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.stat-number{font-size:32px;font-weight:700;color:var(--color-primary);margin-bottom:8px}.stat-label{font-size:12px;color:var(--color-text-secondary);font-weight:500;text-transform:uppercase;letter-spacing:.5px}.filter-group{display:flex;flex-direction:column;gap:12px}.filter-group-title{font-size:13px;font-weight:600;color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px}.filter-list{display:flex;flex-direction:column;gap:4px}.filter-item{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--color-background);border:1px solid var(--color-border);border-radius:var(--radius-card);cursor:pointer;transition:all .2s ease;text-align:left;font-size:14px;font-weight:500;color:var(--color-text-primary)}.filter-item:hover{background:var(--color-surface);border-color:var(--color-primary);transform:translate(4px)}.filter-item.active{background:linear-gradient(135deg,var(--color-primary) 0%,#4A90E2 100%);color:#fff;border-color:var(--color-primary);box-shadow:var(--shadow-md)}.filter-icon{font-size:16px;width:20px;text-align:center}.priority-dot{width:12px;height:12px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:8px;line-height:1}.filter-count{margin-left:auto;background:#0000001a;color:var(--color-text-secondary);padding:2px 8px;border-radius:12px;font-size:12px;font-weight:600;min-width:24px;text-align:center}.filter-item.active .filter-count{background:#fff3;color:#fff}.clear-filters-btn{width:100%;padding:16px;background:linear-gradient(135deg,var(--color-danger) 0%,#C0392B 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ease}.task-input-container.expanded{transform:scale(1.02)}.task-input-form{width:100%}.input-group{display:flex;flex-direction:column;gap:16px}.input-wrapper{position:relative;display:flex;align-items:center}.task-input-field{width:100%;padding:20px;background:var(--color-background);border:2px solid var(--color-border);border-radius:var(--radius-sidebar);font-size:16px;font-weight:500;transition:all .3s ease;color:var(--color-text-primary)}.task-input-field:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 4px #1e90ff1a;transform:translateY(-2px)}.input-actions{display:flex;align-items:center;justify-content:space-between;animation:slideDown .2s ease-out;width:100%}.priority-selector{display:flex;align-items:center;gap:12px;flex-shrink:0}.action-buttons{display:flex;gap:12px;align-items:center;flex-shrink:0}.priority-options{display:flex;gap:10px}.priority-btn{width:36px;height:36px;border-radius:50%;border:none;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;color:transparent;overflow:hidden}.priority-btn.high{background-color:orange}.priority-btn.medium{background-color:#007bff}.priority-btn.low{background-color:#6c757d}.priority-btn:hover,.priority-btn.active{transform:scale(1.1);color:#fff}.priority-btn.high:hover,.priority-btn.high.active{background-color:#ff8c00;color:#fff}.priority-btn.medium:hover,.priority-btn.medium.active{background-color:#0056b3;color:#fff}.priority-btn.low:hover,.priority-btn.low.active{background-color:#495057;color:#fff}.submit-btn{display:flex;align-items:center;gap:8px;padding:12px 24px;background:linear-gradient(135deg,var(--color-primary) 0%,#4A90E2 100%);color:#fff;border:none;border-radius:var(--radius-button);font-size:14px;font-weight:600;cursor:pointer;transition:all .3s ease}.submit-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-md)}.submit-btn:disabled{opacity:.5;cursor:not-allowed}.btn-arrow{transition:transform .3s ease}.submit-btn:hover .btn-arrow{transform:translate(4px)}.cancel-btn{padding:12px 20px;background:transparent;color:var(--color-text-secondary);border:1px solid var(--color-border);border-radius:var(--radius-button);font-size:14px;font-weight:500;cursor:pointer;transition:all .2s ease}.cancel-btn:hover{background:var(--color-surface);color:var(--color-text-primary)}.task-list{display:flex;flex-direction:column;gap:20px}.task-item{background:var(--color-background);border:1px solid var(--color-border);border-radius:var(--radius-sidebar);padding:24px;box-shadow:var(--shadow-sm);display:flex;justify-content:space-between;align-items:flex-start;gap:20px;transition:all .3s ease;cursor:pointer;position:relative;overflow:hidden}.task-item.completed{opacity:.7}.task-item.completed .task-title{text-decoration:line-through;color:var(--color-text-secondary)}.task-item.completed .task-description{text-decoration:line-through;color:var(--color-text-muted)}.task-checkbox{flex-shrink:0;margin-right:12px;margin-top:2px}.task-checkbox input[type=checkbox]{display:none}.checkbox-label{width:20px;height:20px;border:2px solid var(--color-border);border-radius:50%;background:var(--color-background);cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;position:relative}.checkbox-label:hover{border-color:var(--color-primary)}.task-checkbox input[type=checkbox]:checked+.checkbox-label{background:var(--color-primary);border-color:var(--color-primary)}.task-checkbox input[type=checkbox]:checked+.checkbox-label:after{content:"✓";color:#fff;font-size:14px;font-weight:700;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.task-item:before{content:"";position:absolute;top:0;left:0;width:4px;height:100%;background:var(--color-primary);opacity:0;transition:opacity .3s ease}.task-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--color-primary)}.task-item:hover:before{opacity:1}.task-content{flex:1;min-width:0}.task-title{font-size:18px;font-weight:600;margin-bottom:8px;word-break:break-word;color:var(--color-text-primary);line-height:1.4}.task-description{font-size:14px;color:var(--color-text-secondary);margin-bottom:16px;line-height:1.6;word-break:break-word}.task-meta{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.task-tag{background:linear-gradient(135deg,var(--color-primary) 0%,#4A90E2 100%);color:#fff;padding:4px 12px;border-radius:16px;font-size:12px;font-weight:600;box-shadow:var(--shadow-sm)}.task-priority{font-size:12px;font-weight:600;padding:4px 8px;border-radius:8px;background:var(--color-surface)}.task-actions{display:flex;gap:8px;flex-shrink:0}.edit-button,.delete-button{width:40px;height:40px;border:none;border-radius:var(--radius-button);background:var(--color-surface);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease;font-size:16px;border:1px solid var(--color-border)}.edit-button:hover{background:var(--color-primary);color:#fff;border-color:var(--color-primary);transform:scale(1.1)}.delete-button:hover{background:var(--color-danger);color:#fff;border-color:var(--color-danger);transform:scale(1.1)}.empty-state{text-align:center;padding:80px 40px;color:var(--color-text-secondary)}.empty-state p{font-size:18px;font-weight:500;margin-bottom:16px}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:2000;animation:fadeIn .2s ease-out}.modal{background:var(--color-background);border-radius:var(--radius-modal);box-shadow:var(--shadow-lg);width:90%;max-width:600px;max-height:90vh;overflow-y:auto;animation:slideUp .3s ease-out;border:1px solid var(--color-border)}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:32px 32px 24px;border-bottom:1px solid var(--color-border);background:var(--color-surface)}.modal-header h2{font-size:24px;font-weight:700;color:var(--color-text-primary)}.close-button{width:40px;height:40px;border:none;background:transparent;font-size:24px;cursor:pointer;color:var(--color-text-secondary);border-radius:var(--radius-button);transition:all .2s 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32px;border-radius:var(--radius-button);font-size:16px;font-weight:600;cursor:pointer;transition:all .3s ease;border:none;display:flex;align-items:center;gap:8px}.cancel-button{background:var(--color-surface);color:var(--color-text-primary);border:2px solid var(--color-border)}.cancel-button:hover{background:var(--color-border);transform:translateY(-2px)}.save-button{background:linear-gradient(135deg,var(--color-primary) 0%,#4A90E2 100%);color:#fff;box-shadow:var(--shadow-md)}.save-button:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(30px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes slideIn{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes slideDown{0%{transform:translateY(-10px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}@media (max-width: 1200px){:root{--sidebar-width: 280px}.content-wrapper{padding:24px}}@media (max-width: 768px){.app-layout{flex-direction:column}.sidebar{width:100%;max-height:300px;padding:20px}.main-content{padding:0}.content-wrapper{padding:16px}.stats-grid{grid-template-columns:1fr}.topbar{padding:0 16px}.logo-text{font-size:20px}.avatar{width:32px;height:32px}.task-input-field{padding:16px;font-size:16px}.task-item{padding:20px}.modal{width:95%;margin:16px}.modal-header,.modal-form{padding:24px}}@media (max-width: 480px){.topbar-content{flex-direction:column;gap:8px;padding:8px 0}.avatar{width:28px;height:28px}.content-wrapper{padding:12px;gap:24px}.task-item{flex-direction:column;gap:16px}.task-checkbox{margin-right:0;margin-bottom:8px;align-self:flex-start}.task-actions{align-self:flex-end}.input-actions{flex-direction:column;align-items:stretch;gap:16px}.priority-selector{align-self:flex-start}.action-buttons{justify-content:stretch}.submit-btn,.cancel-btn{flex:1;justify-content:center}}:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}