:root{--bg:#0f1319;--panel:#161b23;--panel-2:#1c222c;--line:#2a323f;--line-soft:#222836;--text:#e6e9ef;--muted:#98a2b3;--faint:#6b7688;--accent:#5b9cff;--accent-dim:#24385c;--matched:#2ecc71;--matched-bg:#2ecc7124;--preserved:#f0b429;--preserved-bg:#f0b42924;--dropped:#7b8494;--dropped-bg:#7b849414;--danger:#ff6b6b;--danger-bg:#ff6b6b1f;--radius:10px;--mono:ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;margin:0;font:14px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}button{font:inherit;color:inherit;cursor:pointer}input,select,textarea{font:inherit;color:inherit}.app{flex-direction:column;min-height:100vh;display:flex}.topbar{border-bottom:1px solid var(--line);background:var(--panel);z-index:20;flex-wrap:wrap;align-items:center;gap:10px 16px;padding:12px 20px;display:flex;position:sticky;top:0}.brand{letter-spacing:-.01em;white-space:nowrap;font-weight:650}.brand span{color:var(--faint);margin-left:8px;font-size:12px;font-weight:400}.tabs{background:var(--panel-2);border-radius:8px;gap:4px;padding:3px;display:flex}.tabs button{color:var(--muted);background:0 0;border:0;border-radius:6px;padding:6px 14px}.tabs button[aria-selected=true]{background:var(--accent-dim);color:var(--text)}.spacer{flex:1}.screen{flex-direction:column;gap:16px;padding:20px;display:flex}.btn{border:1px solid var(--line);background:var(--panel-2);border-radius:8px;padding:6px 12px}.btn:hover{border-color:var(--accent)}.btn.primary{background:var(--accent);border-color:var(--accent);color:#08101d;font-weight:600}.btn.subtle{color:var(--muted);background:0 0}.btn.icon{color:var(--faint);background:0 0;border-color:#0000;border-radius:6px;padding:2px 7px}.btn.icon:hover{color:var(--danger);border-color:var(--line)}.btn:disabled{opacity:.45;cursor:default}select.control,input.control{background:var(--panel-2);border:1px solid var(--line);border-radius:7px;padding:5px 8px}input.control:focus,select.control:focus,textarea:focus{border-color:var(--accent);outline:none}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius)}.card-head{border-bottom:1px solid var(--line-soft);align-items:center;gap:10px;padding:10px 12px;display:flex}.card-title{letter-spacing:.02em;text-transform:uppercase;color:var(--muted);font-size:13px;font-weight:600}.hint{color:var(--faint);font-size:12px}.topbar .hint,.join-bar .hint{white-space:nowrap}.mono{font-family:var(--mono)}.builder-grid{grid-template-columns:repeat(auto-fit,minmax(min(460px,100%),1fr));align-items:start;gap:16px;display:grid}.table-card .name-input{background:0 0;border:1px solid #0000;border-radius:6px;width:12em;padding:3px 6px;font-size:15px;font-weight:650}.table-card .name-input:hover{border-color:var(--line)}.columns{flex-direction:column;gap:6px;padding:8px 12px;display:flex}.table-card{container-type:inline-size}.column-row{grid-template-columns:1.4fr 1fr auto auto 1.3fr auto;align-items:center;gap:6px;display:grid}.column-row>*{min-width:0}@container (width<=620px){.column-row{grid-template-columns:1.6fr 1fr auto auto auto}.column-row .fk-select{grid-area:2/1/auto/-1}.column-row>:last-child{grid-area:1/5}}.column-row .check{color:var(--muted);white-space:nowrap;align-items:center;gap:4px;font-size:11px;display:flex}.grid-wrap{border-top:1px solid var(--line-soft);overflow-x:auto}table.grid{border-collapse:collapse;width:100%;font-size:13px}table.grid th{text-align:left;color:var(--muted);border-bottom:1px solid var(--line);white-space:nowrap;background:var(--panel-2);padding:7px 10px;font-weight:600}table.grid th .th-type{color:var(--faint);margin-left:6px;font-size:11px;font-weight:400}table.grid td{border-bottom:1px solid var(--line-soft);padding:0}table.grid td.rownum,table.grid th.rownum{text-align:right;width:34px;color:var(--faint);font-family:var(--mono);padding:4px 6px;font-size:11px}table.grid input.cell{width:100%;min-width:90px;font-family:var(--mono);background:0 0;border:1px solid #0000;padding:6px 10px;font-size:12.5px}table.grid input.cell:hover{border-color:var(--line)}table.grid input.cell:focus{border-color:var(--accent);background:#0d1420}table.grid input.cell::placeholder{color:#4b5566;font-style:italic}.cell-flag{box-shadow:inset 2px 0 0 var(--preserved)}.grid-foot{align-items:center;gap:8px;padding:8px 12px;display:flex}.issue-list{flex-direction:column;gap:4px;padding:10px 12px;font-size:12.5px;display:flex}.issue{align-items:baseline;gap:8px;display:flex}.issue .tag{text-transform:uppercase;letter-spacing:.06em;border-radius:4px;flex:none;padding:1px 6px;font-size:10px}.issue.warning .tag{background:var(--preserved-bg);color:var(--preserved)}.issue.error .tag{background:var(--danger-bg);color:var(--danger)}.playground{flex-direction:column;gap:14px;display:flex}.join-bar{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.join-bar .btn.active{border-color:var(--accent);background:var(--accent-dim)}.sources{grid-template-columns:repeat(auto-fit,minmax(340px,1fr));align-items:start;gap:16px;display:grid}.source-row.matched td{background:var(--matched-bg)}.source-row.preserved td{background:var(--preserved-bg)}.source-row.dropped td{background:var(--dropped-bg);color:var(--dropped);-webkit-text-decoration:line-through #7b849499;text-decoration:line-through #7b849499}.source-row.focused td,.source-row td.col-focused{box-shadow:inset 0 0 0 1px 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td,table.grid tr.result-row.focused td{background:#5b9cff1f}table.grid td.null-cell,.null-value{color:var(--preserved);font-style:italic}.result-source{font-family:var(--mono);color:var(--faint);white-space:nowrap;font-size:11px}.empty{text-align:center;color:var(--faint);padding:22px;font-size:13px}.modal-backdrop{z-index:50;background:#05080cb3;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.modal{background:var(--panel);border:1px solid var(--line);border-radius:12px;flex-direction:column;width:min(760px,100%);max-height:100%;display:flex}.modal textarea{resize:vertical;border:1px solid var(--line);width:100%;min-height:260px;font-family:var(--mono);background:#0d1420;border-radius:8px;padding:10px 12px;font-size:12.5px}.modal-body{flex-direction:column;gap:10px;padding:12px;display:flex;overflow:auto}.modal-foot{border-top:1px solid var(--line-soft);justify-content:flex-end;gap:8px;padding:12px;display:flex}.gate{place-items:center;min-height:100vh;padding:24px;display:grid}.gate-card{text-align:center;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);width:100%;max-width:380px;padding:32px}.gate-mark{justify-content:center;margin-bottom:12px;display:flex}.gate-card h1{margin:0 0 10px;font-size:20px;font-weight:600}.gate-lead{color:var(--muted);margin:0;font-size:13px}.gate-button{border-radius:var(--radius);background:var(--accent);color:#08101f;cursor:pointer;border:0;width:100%;margin-top:22px;padding:11px 16px;font-weight:600}.gate-button:hover{filter:brightness(1.08)}.gate-error{background:var(--danger-bg);color:var(--danger);text-align:left;border-radius:8px;margin:16px 0 0;padding:9px 12px;font-size:12px}.user-menu{border-left:1px solid var(--line);flex:none;align-items:center;gap:8px;margin-left:2px;padding-left:14px;display:flex}.user-avatar{object-fit:cover;border-radius:50%;flex:none;width:26px;height:26px}.user-avatar-blank{background:var(--accent-dim);color:var(--text);place-items:center;font-size:12px;font-weight:600;display:grid}.user-name{text-overflow:ellipsis;white-space:nowrap;max-width:120px;font-size:13px;overflow:hidden}.user-signout{border:1px solid var(--line);color:var(--muted);cursor:pointer;background:0 0;border-radius:8px;padding:5px 10px;font-size:12px}.user-signout:hover{color:var(--text);border-color:var(--faint)}@media (width<=1360px){.brand span{display:none}}.topbar-right{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:10px;margin-left:auto;display:flex}.project-menu{border-left:1px solid var(--line);align-items:center;gap:6px;padding-left:14px;display:flex}.project-menu .control{max-width:160px}.topbar-right 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var(--line-soft);background:var(--panel-2);align-items:baseline;gap:12px;padding:10px 14px;display:flex}.plan-title{letter-spacing:.04em;color:var(--muted);font-size:12px;font-weight:650}.plan-body{font:12px/1.6 var(--mono);color:var(--text);white-space:pre;tab-size:2;margin:0;padding:14px;overflow-x:auto}.plan-body-error,.plan-empty{margin:12px 14px}.anim-card{padding:0;overflow:hidden}.anim-head{border-bottom:1px solid var(--line-soft);background:var(--panel-2);flex-wrap:wrap;align-items:baseline;gap:12px;padding:10px 14px;display:flex}.anim-algo{color:var(--accent);font-weight:650}.anim-blurb{color:var(--muted);max-width:90ch;margin:12px 14px 0;font-size:13px}.anim-swap{border-left:2px solid var(--preserved);background:var(--preserved-bg);color:var(--text);padding:8px 10px}.anim-controls{flex-wrap:wrap;align-items:center;gap:6px;padding:12px 14px 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th{text-align:left;color:var(--faint);border-bottom:1px solid var(--line-soft);padding:6px 10px;font-weight:500}.anim-table td{border-bottom:1px solid var(--line-soft);font-family:var(--mono);padding:6px 10px}.anim-key-col{color:var(--text);background:#5b9cff0f}.anim-row.active td{background:var(--accent-dim)}.anim-row.hit td{background:var(--matched-bg)}.anim-row.miss td{background:var(--dropped-bg)}.anim-row.active td:first-child{box-shadow:inset 3px 0 0 var(--accent)}.anim-row.hit td:first-child{box-shadow:inset 3px 0 0 var(--matched)}.anim-row.miss td:first-child{box-shadow:inset 3px 0 0 var(--dropped)}.anim-row.padded td:first-child{box-shadow:inset 3px 0 0 var(--preserved)}.anim-row.padded td{background:var(--preserved-bg)}.anim-bucket-list{margin:0;padding:6px 10px;list-style:none}.anim-bucket-list li{border-bottom:1px solid var(--line-soft);gap:8px;padding:4px 0;font-size:12px;display:flex}.anim-bucket-key{min-width:40px;color:var(--accent)}.anim-bucket-rows{color:var(--muted)}.anim-empty{margin:10px}.anim-output{border:1px solid var(--line-soft);border-radius:var(--radius);max-height:320px;margin:14px;overflow:auto}.lang-select{max-width:130px}.landing{flex-direction:column;min-height:100vh;display:flex}.landing-nav{border-bottom:1px solid var(--line);background:var(--panel);z-index:20;align-items:center;gap:16px;padding:14px 28px;display:flex;position:sticky;top:0}.landing-brand{letter-spacing:-.01em;white-space:nowrap;align-items:center;gap:9px;font-weight:650;display:flex}.landing-nav-right{align-items:center;gap:10px;margin-left:auto;display:flex}.landing-nav-signin{white-space:nowrap}.landing main{flex:1;width:100%;max-width:1000px;margin:0 auto;padding:0 24px}.landing-hero{text-align:center;padding:88px 0 56px}.landing-hero h1{letter-spacing:-.02em;max-width:18ch;margin:0 auto 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(width<=620px){.landing-nav,.landing-foot{padding-inline:18px}.landing-hero{padding-top:56px}}.anim-stages{flex-wrap:wrap;align-items:center;gap:6px;padding:12px 14px 0;display:flex}.anim-stage{border:1px solid var(--line);color:var(--muted);cursor:pointer;background:0 0;border-radius:999px;padding:4px 10px;font-size:12px}.anim-stage:hover{color:var(--text);border-color:var(--faint)}.anim-stage.active{border-color:var(--accent);color:var(--text);background:var(--accent-dim)}.anim-stage.skipped{color:var(--faint);border-style:dashed}.anim-skipped{margin:12px 14px}