:root{--font-sans:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;--bg-primary:#fff;--bg-secondary:#fbfbfa;--bg-tertiary:#f1f1ef;--border-color:#ededeb;--text-primary:#37352f;--text-secondary:#7a7a78;--text-muted:#acacab;--primary-color:#2383e2;--primary-hover:#1a6ab4;--status-todo:#e3e2e0;--status-todo-text:#504e4a;--status-progress:#d3e5ef;--status-progress-text:#185c80;--status-done:#dbeddb;--status-done-text:#2b593f;--priority-low:#e3e2e0;--priority-low-text:#504e4a;--priority-medium:#fdecc8;--priority-medium-text:#8a670f;--priority-high:#ffe2dd;--priority-high-text:#c03725;--transition-fast:.15s ease;--transition-normal:.25s ease;--shadow-sm:0 1px 2px #0f0f0f0d, 0 2px 4px #0f0f0f0d;--shadow-md:0 4px 6px -1px #0000000d, 0 2px 4px -1px #00000008}@media (prefers-color-scheme:dark){:root{--bg-primary:#191919;--bg-secondary:#202020;--bg-tertiary:#2a2a2a;--border-color:#2f2f2f;--text-primary:#fff;--text-secondary:#9b9b9b;--text-muted:#606060;--primary-color:#2f81f7;--primary-hover:#58a6ff;--status-todo:#2c2c2c;--status-todo-text:#9b9b9b;--status-progress:#1c3d5a;--status-progress-text:#70b0ff;--status-done:#1b4721;--status-done-text:#8bf79b;--priority-low:#2c2c2c;--priority-low-text:#9b9b9b;--priority-medium:#4c3e1b;--priority-medium-text:#f5d06e;--priority-high:#581c15;--priority-high-text:#ff8b7c}}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.5}button,input,select,textarea{color:inherit;font-family:inherit}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.app-container{width:100vw;height:100vh;display:flex;overflow:hidden}.sidebar{background-color:var(--bg-secondary);border-right:1px solid var(--border-color);width:240px;transition:transform var(--transition-normal);flex-direction:column;flex-shrink:0;display:flex}.sidebar-header{border-bottom:1px solid var(--border-color);align-items:center;gap:10px;padding:16px 20px;display:flex}.sidebar-logo{background:var(--primary-color);color:#fff;border-radius:4px;justify-content:center;align-items:center;width:24px;height:24px;font-size:14px;font-weight:700;display:flex}.sidebar-title{letter-spacing:-.2px;font-size:16px;font-weight:600}.sidebar-menu{flex-direction:column;flex:1;gap:4px;padding:16px 8px;display:flex}.sidebar-item{cursor:pointer;color:var(--text-secondary);text-align:left;width:100%;transition:background var(--transition-fast), color var(--transition-fast);background:0 0;border:none;border-radius:6px;align-items:center;gap:8px;padding:8px 12px;font-size:14px;text-decoration:none;display:flex}.sidebar-item:hover,.sidebar-item.active{background-color:var(--bg-tertiary);color:var(--text-primary)}.sidebar-footer{border-top:1px solid var(--border-color);flex-direction:column;gap:8px;padding:16px;display:flex}.user-info{flex-direction:column;gap:2px;margin-bottom:8px;display:flex}.user-email{word-break:break-all;font-size:13px;font-weight:500}.user-role{color:var(--text-secondary);font-size:11px}.btn-signout{border:1px solid var(--border-color);cursor:pointer;transition:background var(--transition-fast);background:0 0;border-radius:6px;justify-content:center;align-items:center;gap:6px;padding:8px;font-size:13px;font-weight:500;display:flex}.btn-signout:hover{background:var(--bg-tertiary)}.main-content{background-color:var(--bg-primary);flex-direction:column;flex:1;display:flex;overflow:hidden}.header{border-bottom:1px solid var(--border-color);background-color:var(--bg-primary);justify-content:space-between;align-items:center;height:57px;padding:0 24px;display:flex}.header-title{letter-spacing:-.3px;font-size:18px;font-weight:600}.header-actions{align-items:center;gap:12px;display:flex}.btn{cursor:pointer;transition:all var(--transition-fast);border:1px solid #0000;border-radius:6px;justify-content:center;align-items:center;gap:6px;padding:8px 14px;font-size:14px;font-weight:500;display:inline-flex}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.btn-secondary{border-color:var(--border-color);color:var(--text-primary);background-color:#0000}.btn-secondary:hover{background-color:var(--bg-tertiary)}.board-container{flex:1;align-items:flex-start;gap:20px;padding:24px;display:flex;overflow-x:auto}.board-column{flex-direction:column;flex-shrink:0;width:320px;max-height:100%;display:flex}.column-header{justify-content:space-between;align-items:center;margin-bottom:12px;padding:4px;display:flex}.column-title-group{align-items:center;gap:8px;display:flex}.column-title{border-radius:4px;padding:4px 8px;font-size:14px;font-weight:600}.column-title.todo{background-color:var(--status-todo);color:var(--status-todo-text)}.column-title.progress{background-color:var(--status-progress);color:var(--status-progress-text)}.column-title.done{background-color:var(--status-done);color:var(--status-done-text)}.column-count{color:var(--text-secondary);font-size:12px}.btn-add-column-task{cursor:pointer;color:var(--text-secondary);width:24px;height:24px;transition:background var(--transition-fast), color var(--transition-fast);background:0 0;border:none;border-radius:4px;justify-content:center;align-items:center;display:flex}.btn-add-column-task:hover{background:var(--bg-tertiary);color:var(--text-primary)}.task-list{min-height:150px;transition:border-color var(--transition-fast);border:1px dashed #0000;border-radius:6px;flex-direction:column;flex:1;gap:8px;padding:4px;display:flex;overflow-y:auto}.task-list.drag-over{border-color:var(--primary-color);background-color:#2383e205}.task-card{background-color:var(--bg-primary);border:1px solid var(--border-color);cursor:pointer;box-shadow:var(--shadow-sm);transition:transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);border-radius:8px;flex-direction:column;gap:10px;padding:14px;display:flex}.task-card:hover{border-color:var(--text-muted);box-shadow:var(--shadow-md);transform:translateY(-2px)}.task-card.todo{background-color:var(--status-todo);border-color:#504e4a26}.task-card.todo .task-card-body{color:var(--status-todo-text);opacity:.85}.task-card.progress{background-color:var(--status-progress);border-color:#185c8026}.task-card.progress .task-card-body{color:var(--status-progress-text);opacity:.85}.task-card.done{background-color:var(--status-done);border-color:#2b593f26}.task-card.done .task-card-body{color:var(--status-done-text);opacity:.85}.task-card-header{justify-content:space-between;align-items:flex-start;gap:8px;display:flex}.task-card-title{word-break:break-word;font-size:14px;font-weight:500;line-height:1.4}.task-card-body{color:var(--text-secondary);word-break:break-word;-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:13px;display:-webkit-box;overflow:hidden}.task-card-footer{justify-content:space-between;align-items:center;margin-top:4px;display:flex}.task-badges{align-items:center;gap:6px;display:flex}.badge{border-radius:4px;padding:2px 6px;font-size:11px;font-weight:500}.badge-low{background-color:var(--priority-low);color:var(--priority-low-text)}.badge-medium{background-color:var(--priority-medium);color:var(--priority-medium-text)}.badge-high{background-color:var(--priority-high);color:var(--priority-high-text)}.task-assignee{background-color:var(--bg-tertiary);width:22px;height:22px;color:var(--text-secondary);border:1px solid var(--border-color);border-radius:50%;justify-content:center;align-items:center;font-size:10px;font-weight:600;display:flex}.board-empty{height:100%;color:var(--text-secondary);text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;display:flex}.board-empty-icon{opacity:.5;margin-bottom:16px;font-size:48px}.modal-overlay{z-index:1000;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background-color:#0006;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-content{background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:12px;flex-direction:column;width:100%;max-width:540px;max-height:90vh;animation:.2s modalEnter;display:flex;overflow:hidden;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a}@keyframes modalEnter{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.modal-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:20px 24px;display:flex}.modal-title{font-size:16px;font-weight:600}.btn-close{cursor:pointer;color:var(--text-secondary);width:28px;height:28px;transition:background var(--transition-fast);background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;display:flex}.btn-close:hover{background:var(--bg-tertiary);color:var(--text-primary)}.modal-body{flex-direction:column;gap:18px;padding:24px;display:flex;overflow-y:auto}.form-group{flex-direction:column;gap:6px;display:flex}.form-label{color:var(--text-secondary);font-size:12px;font-weight:500}.form-input,.form-select,.form-textarea{border:1px solid var(--border-color);background-color:var(--bg-primary);width:100%;transition:border-color var(--transition-fast);border-radius:6px;padding:8px 12px;font-size:14px}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--primary-color);outline:none}.form-textarea{resize:vertical;min-height:120px}.form-row{grid-template-columns:1fr 1fr;gap:16px;display:grid}.modal-footer{border-top:1px solid var(--border-color);background-color:var(--bg-secondary);justify-content:space-between;align-items:center;padding:16px 24px;display:flex}.modal-footer-actions{gap:10px;display:flex}.btn-delete{color:var(--priority-high-text);cursor:pointer;transition:background var(--transition-fast);background:0 0;border:none;border-radius:6px;padding:8px 12px;font-size:14px;font-weight:500}.btn-delete:hover{background:#ffe2dd}@media (prefers-color-scheme:dark){.btn-delete:hover{background:#4a1a15}}.auth-container{background-color:var(--bg-secondary);justify-content:center;align-items:center;width:100vw;height:100vh;padding:20px;display:flex}.auth-card{background-color:var(--bg-primary);border:1px solid var(--border-color);width:100%;max-width:400px;box-shadow:var(--shadow-md);border-radius:12px;flex-direction:column;gap:20px;padding:32px 24px;display:flex}.auth-header{text-align:center;flex-direction:column;align-items:center;gap:8px;display:flex}.auth-logo{background:var(--primary-color);color:#fff;border-radius:8px;justify-content:center;align-items:center;width:36px;height:36px;margin-bottom:8px;font-size:20px;font-weight:800;display:flex}.auth-title{letter-spacing:-.5px;font-size:24px;font-weight:700}.auth-subtitle{color:var(--text-secondary);font-size:14px}.auth-form{flex-direction:column;gap:16px;display:flex}.auth-error{background-color:var(--priority-high);color:var(--priority-high-text);border:1px solid #c037251a;border-radius:6px;padding:10px 12px;font-size:13px}.auth-switch{text-align:center;color:var(--text-secondary);font-size:13px}.auth-link{color:var(--primary-color);cursor:pointer;background:0 0;border:none;padding:0 4px;font-weight:500;text-decoration:none}.auth-link:hover{text-decoration:underline}.spinner{border:3px solid var(--border-color);border-top:3px solid var(--primary-color);border-radius:50%;width:24px;height:24px;margin:0 auto;animation:.8s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.loading-screen{background-color:var(--bg-secondary);flex-direction:column;justify-content:center;align-items:center;gap:12px;width:100vw;height:100vh;display:flex}.loading-text{color:var(--text-secondary);font-size:14px;font-weight:500}.filter-bar{border-bottom:1px solid var(--border-color);background-color:var(--bg-secondary);flex-wrap:wrap;align-items:center;gap:16px;padding:12px 24px;display:flex}.filter-group{align-items:center;gap:8px;display:flex}.filter-label{color:var(--text-secondary);font-size:12px;font-weight:500}.filter-input{border:1px solid var(--border-color);background-color:var(--bg-primary);color:var(--text-primary);transition:border-color var(--transition-fast);border-radius:6px;outline:none;padding:6px 10px;font-size:13px}.filter-input:focus{border-color:var(--primary-color)}.filter-select{border:1px solid var(--border-color);background-color:var(--bg-primary);color:var(--text-primary);cursor:pointer;border-radius:6px;outline:none;padding:6px 10px;font-size:13px}.filter-checkbox-label{color:var(--text-secondary);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:6px;font-size:13px;display:flex}.filter-checkbox{width:14px;height:14px;accent-color:var(--primary-color);cursor:pointer}.task-card.archived{opacity:.55;border-style:dashed}.checklist-container{flex-direction:column;gap:8px;margin-top:8px;display:flex}.checklist-item{align-items:center;gap:10px;display:flex}.checklist-checkbox{cursor:pointer;width:15px;height:15px}.checklist-text{flex:1;font-size:14px}.checklist-text.done{color:var(--text-secondary);text-decoration:line-through}.btn-delete-subtask{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:4px;justify-content:center;align-items:center;padding:2px;display:flex}.btn-delete-subtask:hover{background-color:var(--bg-tertiary);color:var(--priority-high-text)}.comments-section{border-top:1px solid var(--border-color);flex-direction:column;gap:12px;margin-top:12px;padding-top:18px;display:flex}.comments-list{flex-direction:column;gap:10px;max-height:200px;padding-right:4px;display:flex;overflow-y:auto}.comment-item{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;align-items:flex-start;gap:10px;padding:8px;display:flex}.comment-meta{justify-content:space-between;align-items:center;width:100%;margin-bottom:2px;display:flex}.comment-author{font-size:12px;font-weight:600}.comment-time{color:var(--text-muted);font-size:10px}.comment-text{word-break:break-word;color:var(--text-primary);font-size:13px}.comment-input-form{gap:8px;margin-top:4px;display:flex}.markdown-preview{border:1px solid var(--border-color);background-color:var(--bg-secondary);border-radius:6px;min-height:120px;padding:10px 12px;font-size:14px;overflow-y:auto}.markdown-preview h1{border-bottom:1px solid var(--border-color);margin-bottom:8px;padding-bottom:4px;font-size:1.5em}.markdown-preview h2{margin-bottom:6px;font-size:1.3em}.markdown-preview h3{margin-bottom:4px;font-size:1.1em}.markdown-preview ul{margin-bottom:8px;margin-left:20px}.markdown-preview li{margin-bottom:2px}.markdown-preview code{background-color:var(--bg-tertiary);border-radius:4px;padding:2px 4px;font-family:monospace;font-size:.9em}.task-card{position:relative}.card-comment-btn{opacity:0;pointer-events:none;background-color:var(--bg-primary);border:1px solid var(--border-color);width:26px;height:26px;color:var(--text-secondary);cursor:pointer;box-shadow:var(--shadow-sm);transition:opacity var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);z-index:5;border-radius:6px;justify-content:center;align-items:center;display:flex;position:absolute;top:8px;right:8px}.card-comment-btn:hover{background-color:var(--bg-tertiary);color:var(--text-primary)}.task-card:hover .card-comment-btn{opacity:1;pointer-events:auto}.task-card-header{padding-right:20px}.comments-popover-overlay{z-index:999;background-color:#0000;position:fixed;inset:0}.comments-popover{background-color:var(--bg-primary);border:1px solid var(--border-color);z-index:1000;border-radius:10px;flex-direction:column;width:360px;animation:.15s cubic-bezier(.16,1,.3,1) popoverEnter;display:flex;position:fixed;overflow:hidden;box-shadow:0 10px 30px #00000026,0 1px 3px #0000000d}@keyframes popoverEnter{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.comments-popover-header{border-bottom:1px solid var(--border-color);background-color:var(--bg-secondary);justify-content:space-between;align-items:center;padding:10px 14px;display:flex}.comments-popover-title{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;max-width:290px;font-size:13px;font-weight:600;overflow:hidden}.comments-popover-body{flex-direction:column;gap:10px;padding:12px;display:flex}