:root{--bg: #f4f5f7;--panel: #ffffff;--border: #e2e4e8;--text: #1f2329;--muted: #8a8f98;--accent: #3b6ef5;--danger: #e5484d}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text)}button{cursor:pointer;border:1px solid var(--border);background:var(--panel);border-radius:8px;padding:8px 14px;font-size:14px;transition:background .15s,border-color .15s}button:hover{border-color:var(--accent)}button[type=submit],.topbar-actions>button:first-child{background:var(--accent);color:#fff;border-color:var(--accent)}button.ghost{background:transparent}button.icon{border:none;background:transparent;color:var(--muted);font-size:20px;line-height:1;padding:2px 8px}button.icon:hover{color:var(--danger)}input{border:1px solid var(--border);border-radius:8px;padding:9px 12px;font-size:14px;width:100%;outline:none}input:focus{border-color:var(--accent)}.muted{color:var(--muted)}.error{background:#fdecec;color:var(--danger);border-radius:8px;padding:10px 14px;margin:12px 0;font-size:14px}.centered{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.login-card{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:32px;width:100%;max-width:340px;display:flex;flex-direction:column;gap:14px;box-shadow:0 8px 30px #0000000d}.login-card h1{margin:0 0 6px;font-size:22px;text-align:center}.app{max-width:1200px;margin:0 auto;padding:20px}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;gap:12px;flex-wrap:wrap}.topbar h1{font-size:22px;margin:0}.topbar-actions{display:flex;gap:8px}.empty{margin-top:40px;text-align:center}.board{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;align-items:start}.panel{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:12px}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:8px}.panel-head h2{margin:0;font-size:17px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.tasks{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.tasks li{display:flex;align-items:center;justify-content:space-between;gap:8px;background:var(--bg);border-radius:8px;padding:8px 10px;font-size:14px}.tasks li span{word-break:break-word}.empty-task{background:transparent!important;font-size:13px}.add-task{display:flex;gap:8px}.add-task input{flex:1}.add-task button{flex:0 0 auto;width:40px;font-size:18px;padding:0}@media(max-width:640px){.board{grid-template-columns:1fr}}