:root{--color-accent: #7C5CFC;--color-accent-50: #EEE9FF;--color-accent-100: #D9CFFF;--color-accent-700: #5B3FD9;--color-bg-app: #F7F4F0;--color-bg-card: #FFFFFF;--color-bg-surface: #EDEBE7;--color-bg-overlay: rgba(28, 27, 46, .45);--color-text-primary: #1C1B2E;--color-text-secondary: #6B6A72;--color-text-muted: #9390A0;--color-text-inverse: #FFFFFF;--color-overdue: #E8453C;--color-overdue-bg: #FDECEA;--color-done: #3DB57A;--color-done-bg: #E8F8EF;--color-warning: #F0A030;--color-warning-bg: #FEF3E2;--color-border: #E3E0DA;--color-border-focus: #7C5CFC;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-full: 999px;--shadow-sm: 0 1px 3px rgba(0,0,0,.08);--shadow-md: 0 4px 12px rgba(0,0,0,.1);--shadow-lg: 0 8px 24px rgba(0,0,0,.12);--shadow-fab: 0 4px 16px rgba(124, 92, 252, .35);--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--bottom-nav-height: 64px;--header-height: 56px;--fab-size: 56px;--transition: .15s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;font-family:-apple-system,SF Pro Display,Inter,Roboto,sans-serif;background:var(--color-bg-app);color:var(--color-text-primary);-webkit-font-smoothing:antialiased}.app-shell{display:flex;flex-direction:column;height:100%;max-width:640px;margin:0 auto;position:relative}.app-main{flex:1;overflow-y:auto;padding-bottom:calc(var(--bottom-nav-height) + 16px)}.page-header{height:var(--header-height);background:var(--color-bg-app);display:flex;align-items:center;justify-content:space-between;padding:0 var(--space-4);position:sticky;top:0;z-index:10}.page-header-title{font-size:22px;font-weight:700;color:var(--color-text-primary);letter-spacing:-.3px}.page-header-subtitle{font-size:13px;color:var(--color-text-muted);margin-top:2px}.header-action-btn{width:40px;height:40px;border-radius:var(--radius-full);border:none;background:transparent;color:var(--color-text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:20px;transition:background var(--transition)}.header-action-btn:hover{background:var(--color-bg-surface)}.bottom-nav{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:640px;height:var(--bottom-nav-height);background:var(--color-bg-card);border-top:1px solid var(--color-border);display:flex;align-items:center;z-index:100}.nav-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;height:100%;border:none;background:transparent;cursor:pointer;color:var(--color-text-muted);font-size:11px;font-weight:500;transition:color var(--transition);position:relative}.nav-item.active{color:var(--color-accent)}.nav-icon{font-size:22px;line-height:1}.nav-badge{position:absolute;top:6px;right:calc(50% - 18px);min-width:16px;height:16px;background:var(--color-overdue);color:#fff;border-radius:var(--radius-full);font-size:10px;font-weight:700;display:flex;align-items:center;justify-content:center;padding:0 4px}.fab{position:fixed;bottom:calc(var(--bottom-nav-height) + 16px);right:16px;width:var(--fab-size);height:var(--fab-size);border-radius:var(--radius-lg);background:var(--color-accent);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:28px;box-shadow:var(--shadow-fab);transition:transform var(--transition),background var(--transition);z-index:50}.fab:hover{transform:scale(1.05);background:var(--color-accent-700)}.fab:active{transform:scale(.97)}.task-card{background:var(--color-bg-card);border-radius:var(--radius-md);padding:14px 16px;margin-bottom:8px;display:flex;align-items:flex-start;gap:12px;cursor:pointer;border-left:3px solid transparent;box-shadow:var(--shadow-sm);transition:box-shadow var(--transition),transform var(--transition)}.task-card:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}.task-card.overdue{border-left-color:var(--color-overdue);background:var(--color-overdue-bg)}.task-card.today{border-left-color:var(--color-accent)}.task-card.done{opacity:.55}.task-check{width:22px;height:22px;border:2px solid var(--color-border);border-radius:var(--radius-full);flex-shrink:0;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:border-color var(--transition),background var(--transition);margin-top:1px}.task-check:hover{border-color:var(--color-accent)}.task-check.checked{background:var(--color-done);border-color:var(--color-done)}.task-check.checked:after{content:"✓";color:#fff;font-size:13px;font-weight:700}.task-body{flex:1;min-width:0}.task-title{font-size:15px;font-weight:500;color:var(--color-text-primary);line-height:1.4;margin-bottom:6px}.task-card.done .task-title{text-decoration:line-through;color:var(--color-text-muted)}.task-meta{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.chip{display:inline-flex;align-items:center;gap:3px;height:22px;padding:0 8px;border-radius:var(--radius-full);font-size:12px;font-weight:500}.chip-category{background:var(--color-accent-50);color:var(--color-accent)}.chip-date{background:var(--color-bg-surface);color:var(--color-text-secondary)}.chip-date.overdue{background:var(--color-overdue-bg);color:var(--color-overdue)}.chip-date.today{background:var(--color-accent-50);color:var(--color-accent)}.chip-date.warning{background:var(--color-warning-bg);color:var(--color-warning)}.chip-recur{background:var(--color-bg-surface);color:var(--color-text-muted)}.task-subtask-count{font-size:12px;color:var(--color-text-muted)}.section-header{display:flex;align-items:center;justify-content:space-between;padding:16px 16px 8px}.section-title{font-size:13px;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.5px}.section-count{font-size:12px;color:var(--color-text-muted);background:var(--color-bg-surface);padding:2px 8px;border-radius:var(--radius-full)}.task-list-section{padding:0 var(--space-4)}.filter-tabs{display:flex;gap:8px;padding:8px 16px 12px;overflow-x:auto;scrollbar-width:none}.filter-tabs::-webkit-scrollbar{display:none}.filter-tab{display:flex;align-items:center;gap:6px;height:34px;padding:0 14px;border-radius:var(--radius-full);border:1.5px solid var(--color-border);background:transparent;color:var(--color-text-secondary);font-size:13px;font-weight:500;cursor:pointer;white-space:nowrap;transition:all var(--transition)}.filter-tab.active{background:var(--color-accent-50);border-color:var(--color-accent);color:var(--color-accent)}.filter-tab .tab-count{background:var(--color-bg-surface);color:var(--color-text-muted);font-size:11px;padding:1px 6px;border-radius:var(--radius-full)}.filter-tab.active .tab-count{background:var(--color-accent-100);color:var(--color-accent)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 24px;text-align:center}.empty-icon{font-size:48px;margin-bottom:16px}.empty-title{font-size:17px;font-weight:600;color:var(--color-text-primary);margin-bottom:8px}.empty-body{font-size:14px;color:var(--color-text-muted);line-height:1.5}@keyframes shimmer{0%{background-position:-400px 0}to{background-position:400px 0}}.skeleton{background:linear-gradient(90deg,var(--color-bg-surface) 25%,var(--color-border) 50%,var(--color-bg-surface) 75%);background-size:400px 100%;animation:shimmer 1.4s infinite;border-radius:var(--radius-sm)}.skeleton-card{height:72px;border-radius:var(--radius-md);margin-bottom:8px}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--color-bg-overlay);z-index:200;display:flex;align-items:flex-end;justify-content:center;animation:fadeIn .15s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.sheet{width:100%;max-width:640px;background:var(--color-bg-card);border-radius:var(--radius-lg) var(--radius-lg) 0 0;max-height:90vh;overflow-y:auto;animation:slideUp .2s ease}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.sheet-handle{width:36px;height:4px;background:var(--color-border);border-radius:var(--radius-full);margin:12px auto 0}.sheet-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px}.sheet-title{font-size:17px;font-weight:700;color:var(--color-text-primary)}.sheet-close{width:32px;height:32px;border:none;background:var(--color-bg-surface);border-radius:var(--radius-full);cursor:pointer;font-size:18px;display:flex;align-items:center;justify-content:center;color:var(--color-text-secondary)}.sheet-body{padding:4px 20px 32px}.form-group{margin-bottom:16px}.form-label{font-size:13px;font-weight:600;color:var(--color-text-secondary);margin-bottom:6px;display:block}.form-input,.form-textarea,.form-select{width:100%;height:48px;border:1.5px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-app);color:var(--color-text-primary);font-size:15px;padding:0 14px;font-family:inherit;transition:border-color var(--transition);outline:none}.form-textarea{height:auto;min-height:80px;padding:12px 14px;resize:vertical}.form-input:focus,.form-textarea:focus,.form-select:focus{border-color:var(--color-accent)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:44px;padding:0 20px;border-radius:var(--radius-md);border:none;font-size:14px;font-weight:600;cursor:pointer;transition:all var(--transition);font-family:inherit;white-space:nowrap}.btn-primary{background:var(--color-accent);color:#fff}.btn-primary:hover{background:var(--color-accent-700)}.btn-ghost{background:transparent;color:var(--color-text-secondary);border:1.5px solid var(--color-border)}.btn-ghost:hover{background:var(--color-bg-surface)}.btn-danger{background:transparent;color:var(--color-overdue);border:1.5px solid var(--color-overdue)}.btn-danger:hover{background:var(--color-overdue-bg)}.btn-full{width:100%}.btn-sm{height:34px;padding:0 14px;font-size:13px}.chat-layout{display:flex;flex-direction:column;height:calc(100vh - var(--bottom-nav-height) - var(--header-height))}.chat-messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px}.chat-bubble{max-width:80%;padding:12px 16px;border-radius:var(--radius-md);font-size:15px;line-height:1.5}.chat-bubble.user{align-self:flex-end;background:var(--color-accent);color:#fff;border-bottom-right-radius:4px}.chat-bubble.assistant{align-self:flex-start;background:var(--color-bg-card);color:var(--color-text-primary);border-bottom-left-radius:4px;box-shadow:var(--shadow-sm)}.chat-bubble-time{font-size:11px;opacity:.65;margin-top:4px;text-align:right}.chat-input-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:var(--color-bg-card);border-top:1px solid var(--color-border)}.chat-input{flex:1;height:44px;border:1.5px solid var(--color-border);border-radius:var(--radius-full);background:var(--color-bg-app);padding:0 16px;font-size:15px;font-family:inherit;outline:none;color:var(--color-text-primary);transition:border-color var(--transition)}.chat-input:focus{border-color:var(--color-accent)}.chat-send-btn{width:44px;height:44px;border-radius:var(--radius-full);background:var(--color-accent);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:20px;transition:background var(--transition);flex-shrink:0}.chat-send-btn:hover{background:var(--color-accent-700)}.chat-send-btn:disabled{opacity:.5;cursor:not-allowed}.date-group{margin-bottom:8px}.date-group-label{padding:8px 16px 4px;font-size:13px;font-weight:600;color:var(--color-text-muted)}.settings-section{margin-bottom:24px}.settings-section-title{font-size:12px;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.5px;padding:0 16px;margin-bottom:8px}.settings-row{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;background:var(--color-bg-card);border-bottom:1px solid var(--color-border)}.settings-row:first-of-type{border-top:1px solid var(--color-border)}.settings-label{font-size:15px;color:var(--color-text-primary)}.settings-value{font-size:14px;color:var(--color-text-muted)}.toast{position:fixed;bottom:calc(var(--bottom-nav-height) + 16px);left:50%;transform:translate(-50%);background:var(--color-text-primary);color:#fff;padding:12px 20px;border-radius:var(--radius-md);font-size:14px;font-weight:500;z-index:500;white-space:nowrap;box-shadow:var(--shadow-lg);animation:toastIn .2s ease}.toast.success{background:var(--color-done)}.toast.error{background:var(--color-overdue)}@keyframes toastIn{0%{opacity:0;transform:translate(-50%) translateY(8px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.divider{height:1px;background:var(--color-border);margin:8px 0}@keyframes spin{to{transform:rotate(360deg)}}.spinner{width:32px;height:32px;border:3px solid var(--color-bg-surface);border-top-color:var(--color-accent);border-radius:50%;animation:spin .7s linear infinite;margin:48px auto}.detail-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--color-bg-app);z-index:150;display:flex;flex-direction:column;max-width:640px;margin:0 auto;overflow-y:auto;animation:slideInRight .2s ease}@keyframes slideInRight{0%{transform:translate(40px);opacity:0}to{transform:translate(0);opacity:1}}.detail-header{display:flex;align-items:center;gap:12px;padding:16px;border-bottom:1px solid var(--color-border);background:var(--color-bg-card);position:sticky;top:0;z-index:10}.detail-back{width:36px;height:36px;border:none;background:transparent;cursor:pointer;font-size:22px;color:var(--color-accent);display:flex;align-items:center}.detail-body{padding:20px 16px}.detail-title{font-size:20px;font-weight:700;color:var(--color-text-primary);margin-bottom:12px;line-height:1.3;border:none;background:transparent;width:100%;font-family:inherit;outline:none}.detail-title:focus{border-bottom:2px solid var(--color-accent)}.subtask-list{margin-top:16px}.subtask-item{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--color-border)}.subtask-check{width:20px;height:20px;border:2px solid var(--color-border);border-radius:4px;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all var(--transition)}.subtask-check.done{background:var(--color-done);border-color:var(--color-done)}.subtask-check.done:after{content:"✓";color:#fff;font-size:12px}.subtask-title{font-size:14px;flex:1}.subtask-title.done{text-decoration:line-through;color:var(--color-text-muted)}.add-subtask-row{display:flex;align-items:center;gap:8px;padding:10px 0}.add-subtask-input{flex:1;border:none;border-bottom:1.5px solid var(--color-border);background:transparent;font-size:14px;color:var(--color-text-primary);padding:4px 0;outline:none;font-family:inherit}.add-subtask-input:focus{border-bottom-color:var(--color-accent)}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.login-card{width:100%;max-width:400px;background:var(--color-bg-card);border-radius:var(--radius-lg);padding:40px 32px;box-shadow:var(--shadow-lg)}.login-logo{font-size:28px;font-weight:800;color:var(--color-accent);letter-spacing:-1px;margin-bottom:8px}.login-tagline{font-size:14px;color:var(--color-text-muted);margin-bottom:32px}.login-error{background:var(--color-overdue-bg);color:var(--color-overdue);border-radius:var(--radius-sm);padding:10px 14px;font-size:14px;margin-bottom:16px}.login-switch{text-align:center;margin-top:20px;font-size:14px;color:var(--color-text-muted)}.link{color:var(--color-accent);cursor:pointer;font-weight:600;background:none;border:none;font-family:inherit;font-size:inherit}.inbox-item{background:var(--color-bg-card);border-radius:var(--radius-md);padding:16px;margin-bottom:8px;box-shadow:var(--shadow-sm)}.inbox-item-text{font-size:15px;color:var(--color-text-primary);margin-bottom:8px;line-height:1.4}.inbox-item-time{font-size:12px;color:var(--color-text-muted)}.inbox-item-actions{display:flex;gap:8px;margin-top:12px}@media (min-width: 640px){.bottom-nav{border-radius:var(--radius-lg) var(--radius-lg) 0 0}.fab{right:calc(50% - 304px)}}