:root,:root[data-theme=dark],html[data-theme="dark"]{color-scheme:dark;--bg:#0b0d0e;--fg:#d7dbde;--dim:#9aa3aa;--accent:#f5a524;--line:#5b666d;--fail:#ff8b8b;--bar:#f5a524;--barfg:#0b0d0e;--panel:#13171a;--muted:#9aa3aa;--syn-kw:#7dcfff;--syn-str:#9ece6a;--syn-num:#ff9e64;--syn-com:#8b9bb4;--syn-type:#bb9af7;--syn-op:#e0af68}:root[data-theme=light],html[data-theme="light"]{color-scheme:light;--bg:#faf9f5;--fg:#14181b;--dim:#4f5a61;--accent:#8a5200;--line:#6b757b;--fail:#b42318;--bar:#f5a524;--barfg:#0b0d0e;--panel:#f1efe8;--muted:#4f5a61;--syn-kw:#0550ae;--syn-str:#116329;--syn-num:#953800;--syn-com:#57606a;--syn-type:#6639ba;--syn-op:#0a3069}*{box-sizing:border-box}[hidden]{display:none!important}html{background:var(--bg);color:var(--fg);font:16px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace}body{margin:0;background:var(--bg)}a{color:var(--accent)}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--accent);outline-offset:2px}h1{font-size:1.25rem;margin:1rem 0 .25rem;color:var(--accent)}h2{font-size:1rem;margin:1.5rem 0 .25rem}p{margin:.5rem 0}code,kbd{border:1px solid var(--line);padding:0 .25em}.dim{color:var(--dim)}.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:var(--bg);padding:4px 8px;z-index:20}.app{display:flex;flex-direction:column;min-height:100vh;min-height:100dvh}.top{display:flex;align-items:center;gap:16px;padding:0 16px;min-height:44px;border-bottom:1px solid var(--line);flex-wrap:wrap}.top nav{display:flex;gap:16px;flex:1}.top a{display:inline-flex;align-items:center;min-height:44px}.top a[aria-current=page]{text-decoration:none;border-bottom:2px solid var(--accent)}.brand{font-weight:700;text-decoration:none}.btn{font:inherit;color:var(--fg);background:var(--panel);border:1px solid var(--line);padding:4px 12px;min-height:36px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:6px}.btn:hover{border-color:var(--accent)}.btn:disabled{opacity:0.5;cursor:not-allowed}.next-cta,.toolbar .run{border-color:var(--accent)}.next-cta{color:var(--accent);font-weight:700}.doc{flex:1;width:100%;max-width:76ch;margin:0 auto;padding:16px;overflow-wrap:anywhere}.doc a{overflow-wrap:anywhere}.doc:focus,.wb:focus{outline:none}.credits{padding-left:1.25rem}.credits li{margin:.5rem 0}.doc ul.credits{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}.doc ul.credits li{margin:0;padding:10px 12px;border:1px solid var(--line);background:var(--panel)}.adapted-footer{margin-top:2rem;padding-top:1rem;border-top:1px solid var(--dim,currentColor);font-size:.9em}.adapted-body pre{overflow-x:auto;padding:.75rem;border:1px solid var(--dim,currentColor)}.engine-panel{border:1px solid var(--line);padding:4px 12px;margin:.75rem 0}.engine-panel p{margin:0}.status{display:flex;gap:16px;align-items:center;padding:4px 16px;background:var(--bar);color:var(--barfg);font-size:.875rem;flex-wrap:wrap}.status .mode{font-weight:700}.status .st-main{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.st-btn{font:inherit;color:inherit;background:none;border:0;padding:2px 6px;cursor:pointer;text-decoration:underline}.cmdline{position:fixed;left:0;right:0;bottom:0;display:flex;flex-direction:column;background:var(--bg);border-top:2px solid var(--accent);z-index:20;box-shadow:0 -8px 24px rgba(0,0,0,0.45)}.cmd-row{display:flex;gap:8px;align-items:center;padding:8px 16px}.cmdline input{flex:1;font:inherit;color:var(--fg);background:var(--bg);border:0;min-height:36px}.cmd-list{list-style:none;margin:0;padding:4px 8px;border-bottom:1px solid var(--line);max-height:45vh;overflow:auto}.cmd-item{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:6px 10px;cursor:pointer;font-size:.875rem}.cmd-item:hover,.cmd-item.active{background:var(--panel);color:var(--accent)}.cmd-label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.cmd-hint{font-size:.75rem;color:var(--dim);white-space:nowrap}.sheet{position:fixed;inset:8% 16px auto;max-width:64ch;margin:0 auto;background:var(--bg);border:1px solid var(--accent);padding:16px;z-index:20;max-height:84vh;overflow:auto;box-shadow:0 12px 32px rgba(0,0,0,0.5)}.sheet dl{margin:0 0 12px}.sheet dl div{display:flex;gap:16px;margin:6px 0;align-items:baseline}.sheet dt{min-width:20ch}.sheet dd{margin:0;color:var(--dim)}.app-wb{height:100vh;height:100dvh}.wb{flex:1;min-height:0;display:grid;grid-template-columns:var(--rail) 6px minmax(0,1fr) 6px var(--check);grid-template-rows:minmax(0,1fr) 6px var(--lower);padding:8px 8px 4px;gap:0}.pane{position:relative;border:1px solid var(--line);min-width:0;min-height:0;display:flex;flex-direction:column;margin-top:8px;overflow:visible;contain:layout style}.pt{position:absolute;top:0;left:12px;transform:translateY(-50%);margin:0;padding:0 6px;font-size:.8125rem;font-weight:400;background:var(--bg);color:var(--accent);z-index:2}.pane>*:not(.pt){position:relative}.p-rail{grid-column:1;grid-row:1/4}.p-editor{grid-column:3;grid-row:1}.p-lower{grid-column:3;grid-row:3}.p-check{grid-column:5;grid-row:1/4}.sep{position:relative;background:transparent;touch-action:none;margin-top:8px}.sep::before{content:"";position:absolute;z-index:3}.sep:hover,.sep:focus-visible{background:var(--accent)}.sep-v{cursor:col-resize}.sep-v::before{inset:0 -9px}.sep-h{cursor:row-resize}.sep-h::before{inset:-9px 0}.sep-rail{grid-column:2;grid-row:1/4}.sep-lower{grid-column:3;grid-row:2;margin-top:0}.sep-check{grid-column:4;grid-row:1/4}.rail-body,.check-body,.lower-body,.panel{padding:12px 12px 8px;overflow:auto;flex:1;scrollbar-width:thin}#lp-results:not([hidden]){display:flex;flex-direction:column;overflow:hidden;padding:8px 12px}#rt-results,#rt-results>.result-mount,.result-tabpanel,.result-grid{display:flex;flex-direction:column;flex:1;min-height:0}.grid-scroll,.editor-mount .cm-scroller{scrollbar-width:thin}.mod{font-size:.8125rem;color:var(--dim);margin:12px 0 4px;font-weight:600;text-transform:uppercase;letter-spacing:.04em}.lessons{list-style:none;margin:0;padding:0}.lessons a{display:block;color:var(--fg);text-decoration:none;padding:4px 6px;min-height:30px;border-left:2px solid transparent}.lessons a:hover{background:var(--panel)}.lessons a[aria-current=page]{color:var(--accent);border-left-color:var(--accent);background:var(--panel);font-weight:600}.toolbar{display:flex;gap:8px;align-items:center;padding:12px 12px 4px;flex-wrap:wrap}.toolbar .engine-panel{margin:0;flex:1;min-width:140px;border:0;padding:0}.editor-lesson{padding:0 0 8px;margin-bottom:8px;border-bottom:1px solid var(--line);font-size:.875rem}.lesson-nav,.check-actions,.hint-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:8px 0}.lesson-title{margin:.25rem 0 .5rem;color:var(--accent)}.codeblock{margin:8px 0;background:var(--panel);border:1px solid var(--line)}.codeblock pre{margin:0;padding:8px 10px;overflow-x:auto}.codeblock code{border:0;padding:0}.code-actions{display:flex;gap:8px;padding:6px 8px;border-top:1px solid var(--line);background:var(--bg)}.rowdiff pre{background:var(--panel);border:1px solid var(--line);padding:8px;overflow-x:auto;margin:4px 0;font-size:.8125rem}.explain{margin-top:12px;padding-top:10px;border-top:1px solid var(--line)}figure{margin:10px 0;padding:10px;border:1px solid var(--line);background:var(--panel);overflow-x:auto}figcaption{font-size:.8125rem;color:var(--accent);margin-bottom:8px;font-weight:600}.viz-plan ol{list-style:none;margin:0;padding-left:16px;border-left:1px dashed var(--line)}.viz-plan>ol{padding-left:0;border-left:0}.viz-plan-row,.viz-bt-meta,.viz-bt-stats,.viz-wal-rec{display:flex;flex-wrap:wrap;gap:6px 12px;align-items:baseline;padding:3px 0;font-size:.8125rem}.viz-plan-hot>.viz-plan-row{color:var(--accent);font-weight:600}.viz-plan-tag,.viz-bt-badge,.viz-wal-rmgr,.viz-wal-fpi{border:1px solid var(--accent);color:var(--accent);padding:0 4px;font-size:.75rem}.viz-bar{display:flex;width:100%;min-height:28px;border:1px solid var(--line);margin:6px 0;overflow:hidden}.viz-seg{display:flex;align-items:center;justify-content:center;padding:2px 6px;font-size:.75rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;border-right:1px solid var(--line)}.viz-seg:last-child{border-right:0}.viz-seg-free{background:var(--bg);color:var(--dim)}.viz-slots{display:block;width:100%;height:auto;margin:6px 0}.viz-slot{fill:var(--bg);stroke:var(--line);stroke-width:1}.viz-slot-live{fill:var(--accent);fill-opacity:0.25;stroke:var(--accent)}.viz-slot-dead{fill:var(--fail);fill-opacity:0.25;stroke:var(--fail)}.viz-slot-redir{stroke-dasharray:2 2}.viz-tuples,.viz-bt-items,.viz-wal-list{list-style:none;margin:6px 0 0;padding:0;font-size:.8125rem}.viz-tuples li,.viz-bt-items li,.viz-wal-rec{display:flex;flex-wrap:wrap;gap:6px 10px;padding:3px 6px;border-top:1px solid var(--line)}.viz-tuple-dead{color:var(--fail)}.viz-tuple-hot{color:var(--accent)}.viz-strip{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}.viz-cell{display:inline-flex;flex-direction:column;gap:2px;padding:4px 8px;border:1px solid var(--line);background:var(--bg);font-size:.75rem;min-width:64px}.viz-buf-dirty,.viz-vm-frozen{border-color:var(--accent)}.viz-vm-vis{color:var(--accent)}.editor-mount{flex:1;min-height:0;padding:4px 12px 12px;display:flex;overflow:hidden}.editor-mount>div{display:flex;flex:1;min-width:0;min-height:0;width:100%}.fallback-editor{flex:1;width:100%;font:inherit;font-size:1rem;color:var(--fg);background:var(--panel);border:1px solid var(--line);padding:8px;resize:none}.editor-mount .cm-editor{flex:1;min-width:0;min-height:0;background:var(--panel);border:1px solid var(--line)}.editor-mount .cm-scroller{font-family:inherit;overflow:auto}.cm-sql-error{text-decoration:underline wavy var(--fail);text-underline-offset:3px}.rt-error,[data-testid=error]{color:var(--fail);white-space:pre-wrap;margin:0 0 8px;font:inherit}.result-cap{color:var(--dim);font-size:.8125rem;margin:8px 0 4px}.result-grid{--grid-head:var(--panel);font-size:.875rem;color:var(--fg)}.result-grid [role=grid]{border:1px solid var(--line)}.result-grid [role=columnheader]{color:var(--accent);cursor:pointer}.result-grid [role=row]:nth-child(even){background:rgba(127,127,127,0.05)}.num{text-align:right}.result-tag{color:var(--dim);margin:0}.cell-null{color:var(--dim);font-style:italic}.result-footer{color:var(--dim);font-size:.8125rem;margin:4px 0 0}#mount-terminal{height:100%;min-height:160px;padding:0;display:flex;flex-direction:column}.tty-bar{display:flex;gap:4px;padding:4px 8px;border-bottom:1px solid var(--line);flex-wrap:wrap}.tty-bar button{font:inherit;font-size:.75rem;color:var(--fg);background:var(--panel);border:1px solid var(--line);padding:4px 8px;min-height:32px;min-width:32px;cursor:pointer}.tty-bar button[aria-pressed=true]{border-color:var(--accent);color:var(--accent)}.tty{position:relative;flex:1;min-height:0;overflow:auto;box-sizing:border-box;padding:8px;background:var(--term-bg,var(--bg));color:var(--term-fg,var(--fg));font:14px/1.4 ui-monospace,Menlo,Consolas,monospace;cursor:text}.tty-l,.tty-in{white-space:pre;min-height:1.4em}.tty-in[hidden]{display:none}.tty-cur{background:var(--accent);color:var(--bg);animation:tty-blink 1.1s steps(1) infinite}.tty:not(.on) .tty-cur{animation:none;background:none;outline:1px solid var(--accent);outline-offset:-1px;color:inherit}@keyframes tty-blink{50%{background:transparent;color:inherit}}@media (prefers-reduced-motion:reduce){.tty-cur{animation:none}}.tty-cap{position:absolute;left:0;top:0;width:1px;height:1px;opacity:0;padding:0;border:0;resize:none}.tty .b{font-weight:700}.tty .c30,.tty .c90{color:var(--dim)}.tty .c31,.tty .c91{color:#e5534b}.tty .c32,.tty .c92{color:#57ab5a}.tty .c33,.tty .c93{color:#c69026}.tty .c34,.tty .c94{color:#539bf5}.tty .c35,.tty .c95{color:#b083f0}.tty .c36,.tty .c96{color:#39c5cf}.tty .c37,.tty .c97{color:var(--fg)}html[data-theme="light"] .tty .c32{color:#116329}html[data-theme="light"] .tty .c33{color:#7a4d00}html[data-theme="light"] .tty .c36{color:#0550ae}html[data-theme="light"] .tty .c31,html[data-theme="light"] .tty .c91{color:#b42318}html[data-theme="light"] .tty .c92{color:#116329}html[data-theme="light"] .tty .c93{color:#7a4d00}html[data-theme="light"] .tty .c34,html[data-theme="light"] .tty .c94,html[data-theme="light"] .tty .c96{color:#0550ae}html[data-theme="light"] .tty .c35,html[data-theme="light"] .tty .c95{color:#6639ba}.tabs{display:flex;gap:4px;padding:12px 12px 0;flex-wrap:wrap}.tabs [role=tab]{font:inherit;color:var(--dim);background:none;border:0;border-bottom:2px solid transparent;padding:4px 8px;min-height:32px;cursor:pointer}.tabs [role=tab][aria-selected=true]{color:var(--accent);border-bottom-color:var(--accent)}.verdict{min-height:1.5em;font-weight:600}.v-ok{color:var(--accent)}.v-fail{color:var(--fail)}.phone-tabs{display:none}@media (min-width:800px) and (max-width:1099px){.wb{grid-template-columns:minmax(150px,var(--rail,200px)) 6px minmax(0,1fr) 6px minmax(200px,var(--check,260px))}}@media (max-width:999px){.btn{min-height:44px}.tty-bar button{min-height:44px;min-width:44px;padding:6px 10px}.st-btn{min-height:44px;padding:6px 8px}.lessons a{min-height:44px;display:flex;align-items:center;gap:4px}.tabs [role=tab]{min-height:44px;padding:6px 10px}.top a,.top .btn{min-height:44px}}@media (max-width:799px){.top{gap:6px 10px;padding:0 10px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}.top nav{gap:10px;flex-wrap:nowrap}.wb{display:block;padding:8px 8px 0;overflow:hidden}.sep{display:none}.wb .pane{display:none;height:calc(100% - 12px);margin-top:12px}.wb[data-tab=lesson] .p-rail,.wb[data-tab=editor] .p-editor,.wb[data-tab=result] .p-lower,.wb[data-tab=check] .p-check{display:flex}.phone-tabs{display:flex;border-top:1px solid var(--line);min-height:48px}.phone-tabs button{flex:1;font:inherit;color:var(--dim);background:none;border:0;min-height:48px;cursor:pointer}.phone-tabs button[aria-pressed=true]{color:var(--accent);border-top:2px solid var(--accent)}.toolbar .run{min-height:44px;min-width:52px;background:var(--accent);color:var(--barfg);border-color:var(--accent)}.editor-mount{font-size:16px}.status{padding:4px 10px;gap:8px;font-size:.75rem}.status .st-keys{display:none}}@media (max-height:540px){.editor-lesson{max-height:68px;overflow-y:auto;padding:4px 10px}}@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}