:root{--text:#2b2b2b;--text-h:#08060d;--bg:#fafafa;--border:#dcdcdc;--card-bg:#fff;--accent:#2563eb;--accent-dark:#1d4ed8;--danger:#b91c1c;--danger-bg:#fee2e2;--low:#6b7280;--medium:#b45309;--high:#b91c1c;--status-todo:#64748b;--status-doing:#2563eb;--status-done:#15803d;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;font:18px/145% system-ui,Segoe UI,Roboto,sans-serif}@media (prefers-color-scheme:dark){:root{--text:#e5e5e5;--text-h:#f3f4f6;--bg:#16171d;--border:#3a3b44;--card-bg:#1f2028;--accent:#60a5fa;--accent-dark:#3b82f6;--danger:#f87171;--danger-bg:#3a1d1d;--low:#9ca3af;--medium:#fbbf24;--high:#f87171;--status-todo:#94a3b8;--status-doing:#60a5fa;--status-done:#4ade80}}*{box-sizing:border-box}body{margin:0}#root{background:var(--bg);width:100%;min-height:100svh}h1{color:var(--text-h);margin:0 0 12px;font-size:28px}h2{color:var(--text-h);margin:20px 0 8px;font-size:18px}.screen{max-width:520px;margin:0 auto;padding:20px 16px 60px}.screen-wide{max-width:1200px}@media (width>=900px){.screen-wide{padding:32px 40px 60px}}.page-header{justify-content:space-between;align-items:center;display:flex}.page-header>div{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.app-title{text-align:center;margin-top:40px;font-size:36px}.btn{border:1px solid var(--border);background:var(--card-bg);color:var(--text-h);cursor:pointer;border-radius:10px;padding:12px 18px;font-size:18px}.btn-big{width:100%;margin:12px 0;padding:18px;font-size:20px;font-weight:600}.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-dark)}.btn-secondary{background:var(--card-bg)}.btn-active{background:var(--accent);color:#fff}.btn-link{color:var(--accent);background:0 0;border:none;padding:8px 0;font-size:16px;text-decoration:underline}.login-form{flex-direction:column;gap:8px;margin-bottom:40px;display:flex}.login-note{color:var(--low);font-size:14px}.login-error{color:var(--danger);font-weight:600}.big-label{margin-top:8px;font-size:15px;font-weight:600}.big-input{border:1px solid var(--border);background:var(--card-bg);color:var(--text);border-radius:8px;width:100%;padding:12px;font-size:18px}.task-form{flex-direction:column;gap:6px;display:flex}.tabs{gap:6px;margin:16px 0;display:flex}.tab{border:2px solid var(--border);background:var(--card-bg);min-height:52px;color:var(--text);cursor:pointer;border-radius:8px;flex:1;padding:10px 4px;font-size:16px;font-weight:600}.tab-active-todo{background:var(--status-todo);border-color:var(--status-todo);color:#fff}.tab-active-doing{background:var(--status-doing);border-color:var(--status-doing);color:#fff}.tab-active-done{background:var(--status-done);border-color:var(--status-done);color:#fff}.tab-count{opacity:.85;margin-left:6px;font-weight:700}.task-list{flex-direction:column;gap:10px;display:flex}.task-card{text-align:left;border:1px solid var(--border);border-left:6px solid var(--status-todo);background:var(--card-bg);cursor:pointer;border-radius:10px;flex-direction:column;gap:8px;width:100%;min-height:64px;padding:16px;display:flex}.task-card-doing{border-left-color:var(--status-doing)}.task-card-done{border-left-color:var(--status-done)}.task-card-overdue{border-left-color:var(--danger);background:var(--danger-bg)}.task-card-top{justify-content:space-between;align-items:center;gap:8px;display:flex}.task-card-title{font-size:18px;font-weight:600}.task-card-bottom{color:var(--low);justify-content:space-between;font-size:15px;display:flex}.task-card-due.overdue{color:var(--danger);font-weight:700}.empty-note{color:var(--low);padding:12px 0;font-size:15px}.badge{color:#fff;border-radius:999px;padding:3px 10px;font-size:13px;font-weight:600;display:inline-block}.badge-low{background:var(--low)}.badge-medium{background:var(--medium)}.badge-high{background:var(--high)}.task-detail-title{font-size:24px}.task-detail-row{justify-content:space-between;align-items:center;gap:8px;margin:10px 0;display:flex}.task-detail-field{margin:20px 0}.field-label{text-transform:uppercase;color:var(--low);margin-bottom:6px;font-size:13px;font-weight:700;display:block}.status-buttons{flex-direction:column;gap:8px;display:flex}.filters{gap:8px;margin:12px 0;display:flex}.overdue-section{background:var(--danger-bg);border-radius:10px;margin-bottom:8px;padding:12px}.overdue-heading{color:var(--danger)}.status-section{margin-top:8px}.status-board{flex-direction:column;gap:8px;display:flex}@media (width>=900px){.filters{max-width:360px}.status-board{grid-template-columns:repeat(3,1fr);align-items:start;gap:20px;display:grid}.status-section{background:var(--card-bg);border:1px solid var(--border);border-radius:10px;margin-top:0;padding:14px}}