:root{--text:#3f3f46;--text-muted:#8b8b93;--bg:#fafafa;--panel:#fff;--border:#e4e4e7;--accent:#2563eb;--danger:#dc2626;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Inter,Roboto,sans-serif}*{box-sizing:border-box}body{background:var(--bg);margin:0}button{cursor:pointer;font-family:inherit}input{font-family:inherit}.login-screen{justify-content:center;align-items:center;min-height:100vh;display:flex}.login-card{background:var(--panel);border:1px solid var(--border);border-radius:12px;flex-direction:column;gap:12px;width:320px;padding:32px;display:flex}.login-card h1{margin:0;font-size:22px}.login-card .subtitle{color:var(--text-muted);margin:0 0 8px;font-size:14px}.login-card input{border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-size:14px}.login-card button{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:10px 12px;font-size:14px;font-weight:600}.error{color:var(--danger);min-height:16px;margin:0;font-size:13px}.layout{min-height:100vh;display:flex}.sidebar{background:var(--panel);border-right:1px solid var(--border);flex-direction:column;flex-shrink:0;gap:12px;width:260px;padding:16px;display:flex}.sidebar-header{justify-content:space-between;align-items:center;display:flex}.sidebar-header h1{margin:0;font-size:18px}.icon-btn{color:var(--text-muted);background:0 0;border:none;border-radius:6px;padding:4px 8px;font-size:16px}.icon-btn:hover{background:var(--bg)}.new-project-btn{border:1px dashed var(--border);color:var(--text-muted);text-align:left;background:0 0;border-radius:8px;padding:8px 10px;font-size:13px}.new-project-btn:hover{border-color:var(--accent);color:var(--accent)}.project-list{flex-direction:column;gap:2px;display:flex;overflow-y:auto}.project-item{cursor:pointer;border-radius:8px;align-items:center;gap:8px;padding:8px 10px;font-size:14px;display:flex}.project-item:hover{background:var(--bg)}.project-item.active{background:#eef2ff;font-weight:600}.dot{border-radius:50%;flex-shrink:0;width:8px;height:8px}.project-name{text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.task-count{color:var(--text-muted);font-size:12px}.empty-hint{color:var(--text-muted);padding:8px 10px;font-size:13px}.main{flex:1;max-width:760px;padding:32px}.content-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.content-header h2{margin:0;font-size:22px}.text-btn{color:var(--text-muted);background:0 0;border:none;font-size:13px}.text-btn:hover{color:var(--danger)}.filters{gap:6px;margin-bottom:16px;display:flex}.filter-btn{border:1px solid var(--border);background:var(--panel);color:var(--text-muted);border-radius:999px;padding:5px 12px;font-size:13px}.filter-btn.active{background:var(--accent);border-color:var(--accent);color:#fff}.new-task-form{gap:8px;margin-bottom:20px;display:flex}.new-task-form input[type=text]{border:1px solid var(--border);border-radius:8px;flex:1;padding:10px 12px;font-size:14px}.new-task-form input[type=date]{border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-size:14px}.new-task-form button{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:10px 16px;font-size:14px;font-weight:600}.task-list{flex-direction:column;gap:6px;display:flex}.task-row{background:var(--panel);border:1px solid var(--border);border-radius:8px;align-items:center;gap:10px;padding:10px 12px;display:flex}.task-row.status-done .task-title{color:var(--text-muted);text-decoration:line-through}.task-status{border:1px solid var(--border);background:var(--bg);color:var(--text);border-radius:6px;padding:4px 6px;font-size:12px}.task-title{flex:1;font-size:14px}.task-due{color:var(--text-muted);font-size:12px}.task-due.overdue{color:var(--danger);font-weight:600}.task-delete{color:var(--text-muted);background:0 0;border:none;border-radius:6px;padding:2px 6px;font-size:18px;line-height:1}.task-delete:hover{color:var(--danger);background:#fef2f2}.empty-state{color:var(--text-muted);text-align:center;padding:40px 0}@media (width<=640px){.layout{flex-direction:column}.sidebar{border-right:none;border-bottom:1px solid var(--border);width:100%}}