:root{--primary: #2563eb;--bg: #f8fafc;--card-bg: #ffffff;--text: #1e293b;--text-sub: #64748b;--border: #e2e8f0;--success: #10b981;--danger: #ef4444}html,body,#root{width:100%;height:100%;margin:0;padding:0;background-color:var(--bg)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--text)}.login-wrapper{position:fixed;top:0;left:0;width:100vw;height:100vh;display:flex;justify-content:center;align-items:center;background:var(--bg);z-index:100}.app-wrapper{width:100%;min-height:100vh;display:flex;justify-content:center;padding:40px 20px;box-sizing:border-box}.app-container{width:100%;max-width:550px}.card{background:var(--card-bg);border-radius:12px;box-shadow:0 1px 3px #0000000d,0 1px 2px #0000001a;border:1px solid var(--border);margin-bottom:24px;overflow:hidden}.login-card{padding:30px;max-width:350px;text-align:center}.login-card input{width:100%;padding:12px;margin:15px 0;border:1px solid var(--border);border-radius:8px;outline:none;box-sizing:border-box}.login-card button{width:100%;padding:12px;background:var(--primary);color:#fff;border:none;border-radius:8px;font-weight:600;cursor:pointer}header{text-align:center;margin-bottom:30px}h1{font-size:24px;font-weight:700;margin-bottom:20px;letter-spacing:-.5px}.tabs{display:inline-flex;background:#f1f5f9;padding:4px;border-radius:10px}.tabs button{background:none;border:none;padding:8px 24px;border-radius:8px;color:var(--text-sub);font-weight:500;cursor:pointer;transition:all .2s}.tabs button.active{background:#fff;color:var(--primary);box-shadow:0 1px 2px #0000000d}.input-area{padding:16px;display:flex;flex-direction:column;gap:10px}.input-title,.input-desc{border:1px solid var(--border);padding:12px;border-radius:8px;font-size:15px;outline:none;font-family:inherit}.input-desc{font-size:13px}.input-title:focus,.input-desc:focus{border-color:var(--primary)}.btn-add{background:var(--text);color:#fff;padding:12px;border:none;border-radius:8px;font-weight:600;cursor:pointer;margin-top:5px}.todo-group{display:flex;flex-direction:column}.main-task-row{padding:20px;display:flex;justify-content:space-between;align-items:flex-start;gap:15px}.task-content{flex:1}.task-header{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:6px}.task-header h3{margin:0;font-size:17px;font-weight:600}.time-tag{font-size:12px;color:#94a3b8}.task-desc{margin:0 0 10px;font-size:14px;color:var(--text-sub)}.progress-container{height:6px;background:#f1f5f9;border-radius:3px;overflow:hidden;display:flex;align-items:center;position:relative;margin-top:8px}.progress-bar{height:100%;background:linear-gradient(90deg,#3b82f6,#60a5fa);transition:width .3s ease}.progress-text{position:absolute;right:0;top:-18px;font-size:11px;color:var(--primary);font-weight:700}.task-actions{display:flex;flex-direction:column;gap:8px}.btn-check-lg{background:#eff6ff;color:var(--primary);border:none;padding:8px;border-radius:8px;cursor:pointer;font-size:16px;transition:background .2s}.btn-check-lg:hover{background:#dbeafe}.btn-del{background:transparent;color:#cbd5e1;border:none;cursor:pointer;font-size:14px}.btn-del:hover{color:var(--danger)}.sub-task-area{background:#f8fafc;border-top:1px solid var(--border);padding:5px 20px 15px}.sub-task-row{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid #f1f5f9}.sub-task-row:last-child{border-bottom:none}.sub-check{display:flex;align-items:center;gap:12px;cursor:pointer;flex:1}.checkbox{width:18px;height:18px;border:2px solid #cbd5e1;border-radius:5px;position:relative;transition:all .2s}.checkbox.checked{background:var(--primary);border-color:var(--primary)}.checkbox.checked:after{content:"✔";color:#fff;font-size:12px;position:absolute;top:-1px;left:2px}.sub-check span{font-size:14px;color:var(--text);transition:color .2s}.sub-done span{text-decoration:line-through;color:#cbd5e1}.btn-icon-del{background:none;border:none;color:#cbd5e1;font-size:18px;cursor:pointer;padding:0 5px}.btn-icon-del:hover{color:var(--danger)}.sub-input-row{display:flex;align-items:center;gap:10px;margin-top:10px;padding-left:4px}.plus-icon{color:var(--primary);font-weight:700;font-size:18px}.sub-input-row input{flex:1;background:transparent;border:none;border-bottom:1px solid transparent;padding:6px 0;font-size:14px;outline:none;transition:border .2s}.sub-input-row input:focus{border-bottom-color:var(--primary)}.sub-input-row input::placeholder{color:#94a3b8}.todo-group.done{opacity:.7}.todo-group.done .main-task-row{opacity:.6}.empty-tip{text-align:center;color:#94a3b8;margin-top:50px}.footer-info{text-align:center;font-size:12px;color:#cbd5e1;margin-top:40px}.btn-link{background:none;border:none;color:var(--text-sub);text-decoration:underline;cursor:pointer}.edit-box{display:flex;flex-direction:column;gap:10px;padding:15px;background:#fff;border-radius:8px;border:1px solid var(--primary)}.sub-edit-box{margin:5px 0;border:1px solid #e2e8f0;background:#f8fafc}.edit-box input,.edit-box textarea{width:100%;padding:8px;border:1px solid #e2e8f0;border-radius:6px;font-family:inherit;font-size:14px;box-sizing:border-box}.edit-actions{display:flex;gap:10px;justify-content:flex-end}.btn-save{background:var(--primary);color:#fff;border:none;padding:6px 12px;border-radius:6px;cursor:pointer}.btn-cancel{background:#e2e8f0;color:var(--text);border:none;padding:6px 12px;border-radius:6px;cursor:pointer}.btn-edit{background:transparent;border:none;cursor:pointer;font-size:16px;padding:0 5px}.btn-icon-edit{background:none;border:none;color:#cbd5e1;font-size:14px;cursor:pointer;padding:0 5px}.btn-icon-edit:hover{color:var(--primary)}.sub-task-wrapper{border-bottom:1px solid #f1f5f9}.sub-task-wrapper:last-child{border-bottom:none}.sub-task-row{display:flex;justify-content:space-between;align-items:flex-start;padding:10px 0}.sub-content{flex:1;display:flex;flex-direction:column;gap:4px}.sub-desc{margin:0 0 0 30px;font-size:12px;color:#94a3b8}