:root{color-scheme:light;--bg:#f7f8fa;--surface:#fff;--surface-2:#eef2f6;--line:#d9e0e8;--text:#151a22;--muted:#667085;--blue:#1d4ed8;--green:#147d64;--red:#b42318;--shadow:0 1px 2px #141c2814;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{min-width:320px;color:var(--text);background:var(--bg);margin:0}button,input,select{font:inherit}button{border:1px solid var(--line);min-height:36px;color:var(--surface);background:var(--blue);cursor:pointer;border-radius:6px;padding:0 12px}button:hover{filter:brightness(.96)}input,select{border:1px solid var(--line);background:var(--surface);width:100%;min-height:36px;color:var(--text);border-radius:6px;padding:0 10px}label span{color:var(--muted);margin-bottom:4px;font-size:12px;display:block}.app-shell{grid-template-rows:56px 1fr;min-height:100vh;display:grid}.topbar{border-bottom:1px solid var(--line);background:var(--surface);justify-content:space-between;align-items:center;gap:16px;padding:0 20px;display:flex}.brand{color:var(--text);align-items:center;gap:10px;font-weight:700;text-decoration:none;display:inline-flex}.brand-mark{background:#172033;border-radius:6px;gap:3px;width:28px;height:28px;padding:5px;display:grid}.brand-mark span{background:#7dd3fc;border-radius:2px;display:block}.brand-mark span:nth-child(2){background:#86efac}.brand-mark span:nth-child(3){background:#fca5a5}.topbar-actions{align-items:center;gap:10px;display:flex}.session-pill{text-overflow:ellipsis;white-space:nowrap;max-width:260px;color:var(--muted);font-size:13px;overflow:hidden}.icon-button{width:36px;color:var(--text);background:var(--surface);padding:0}.workspace{grid-template-columns:minmax(240px,300px) 1fr;min-height:0;display:grid}.sidebar{border-right:1px solid var(--line);background:var(--surface);min-height:calc(100vh - 56px);padding:16px;overflow:auto}.create-board,.signin form{border-bottom:1px solid var(--line);gap:10px;padding-bottom:16px;display:grid}.board-list{gap:6px;margin-top:16px;display:grid}.board-link{min-height:48px;color:var(--text);border:1px solid #0000;border-radius:6px;gap:2px;padding:8px 10px;text-decoration:none;display:grid}.board-link small{color:var(--muted)}.board-link:hover,.board-link.is-active{border-color:var(--line);background:var(--surface-2)}.board-surface{min-width:0;padding:20px;overflow:auto}.empty-state{max-width:560px;padding:48px 0}.empty-state h1,.board-header h1{letter-spacing:0;margin:0;font-size:28px;line-height:1.15}.empty-state p,.board-header p,.muted{color:var(--muted)}.board-header{justify-content:space-between;align-items:end;gap:16px;margin-bottom:18px;display:flex}.task-form{grid-template-columns:minmax(180px,280px) 150px auto;align-items:end;gap:8px;display:grid}.columns{grid-auto-columns:minmax(260px,1fr);grid-auto-flow:column;gap:14px;min-height:360px;padding-bottom:8px;display:grid;overflow-x:auto}.status-column{border:1px solid var(--line);background:var(--surface-2);border-radius:8px;min-width:260px}.status-column>header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;height:48px;padding:0 12px;display:flex}.status-column h2,.members h2{letter-spacing:0;margin:0;font-size:14px;line-height:1.25}.task-list{gap:8px;padding:10px;display:grid}.task-card{border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow);border-radius:8px;gap:8px;padding:10px;display:grid}.task-card strong{line-height:1.25}.task-card p{color:var(--muted);margin:0}.task-card footer{color:var(--muted);justify-content:space-between;align-items:center;gap:8px;font-size:12px;display:flex}.task-actions{gap:6px;display:inline-flex}.task-actions button{min-height:30px;color:var(--text);background:var(--surface);padding:0 8px}.task-actions button:last-child{color:var(--red)}.members{gap:10px;max-width:720px;margin-top:20px;display:grid}.members form{grid-template-columns:minmax(180px,1fr) 140px auto;gap:8px;display:grid}.member-list{flex-wrap:wrap;gap:8px;display:flex}.member-list span{border:1px solid var(--line);background:var(--surface);color:var(--muted);border-radius:999px;padding:6px 10px;font-size:13px}@media (width<=860px){.workspace{grid-template-columns:1fr}.sidebar{border-right:0;border-bottom:1px solid var(--line);min-height:auto}.board-header{flex-direction:column;align-items:stretch}.task-form,.members form{grid-template-columns:1fr}}