:root{
  --paper:#EEF2F8;--sheet:#FFFFFF;--sunk:#F6F8FC;--ink:#18233F;--muted:#56627F;--rule:#D5DDEA;
  --margin:rgba(196,72,72,.38);
  --sql:#0E7480;--py:#2F5FA6;--da:#8A3F9E;--mark:#F2C230;
  --pass:#1B7A44;--fail:#B02E2E;--pass-bg:#E3F3EA;--fail-bg:#F8E5E5;--warn-bg:#FFF6DA;
  --kw:#7A3EB1;--str:#2E7D32;--num:#B5560B;--com:#8A94A8;--def:#1F5FAF;--bi:#0E7480;
  --accent:var(--sql);
  --ui:"Bricolage Grotesque","Segoe UI",system-ui,-apple-system,sans-serif;
  --code:"JetBrains Mono",ui-monospace,"SFMono-Regular",Consolas,monospace;
  --head:56px;
  color-scheme:light;box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#0F1520;--sheet:#161E2C;--sunk:#121927;--ink:#E4EAF5;--muted:#97A3BD;--rule:#2A354A;--margin:rgba(240,112,112,.3);
  --sql:#43C3CC;--py:#86AAF0;--da:#D29BE6;--mark:#E7BB2E;--pass:#56C788;--fail:#F27878;--pass-bg:#15301F;--fail-bg:#3A1A1C;--warn-bg:#352C10;
  --kw:#C49BF0;--str:#8FD694;--num:#F2A365;--com:#7C879E;--def:#86AAF0;--bi:#43C3CC;color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#0F1520;--sheet:#161E2C;--sunk:#121927;--ink:#E4EAF5;--muted:#97A3BD;--rule:#2A354A;--margin:rgba(240,112,112,.3);
  --sql:#43C3CC;--py:#86AAF0;--da:#D29BE6;--mark:#E7BB2E;--pass:#56C788;--fail:#F27878;--pass-bg:#15301F;--fail-bg:#3A1A1C;--warn-bg:#352C10;
  --kw:#C49BF0;--str:#8FD694;--num:#F2A365;--com:#7C879E;--def:#86AAF0;--bi:#43C3CC;color-scheme:dark}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--ui);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
body.t-python{--accent:var(--py)}
body.t-analysis{--accent:var(--da)}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--sheet)}
code,pre,kbd{font-family:var(--code)}
code{font-size:.86em;background:color-mix(in srgb,var(--accent) 11%,transparent);padding:.08em .34em;border-radius:4px}
kbd{font-size:.78em;border:1px solid var(--rule);border-bottom-width:2px;border-radius:4px;padding:0 .35em;background:var(--sheet)}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
[hidden]{display:none!important}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* header */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;height:var(--head);background:var(--sheet);border-bottom:1px solid var(--rule);display:flex;align-items:center;gap:18px;padding:0 20px}
.brand{font-weight:800;font-size:1.15rem;letter-spacing:-.02em;text-decoration:none;white-space:nowrap;font-variation-settings:"opsz" 48}
.brand span{color:var(--accent)}
.nav{display:flex;gap:2px}
.nav a{text-decoration:none;color:var(--muted);font-weight:600;font-size:.95rem;padding:6px 12px;border-radius:8px}
.nav a:hover{color:var(--ink);background:var(--sunk)}
.nav a[aria-current="page"]{color:var(--ink);background:var(--sunk);box-shadow:inset 0 -2px 0 var(--accent)}
.nav a[data-v="sql"][aria-current="page"]{box-shadow:inset 0 -2px 0 var(--sql)}
.nav a[data-v="py"][aria-current="page"]{box-shadow:inset 0 -2px 0 var(--py)}
.top-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.sync{font-size:.82rem;color:var(--muted);display:flex;align-items:center;gap:6px;white-space:nowrap}
.sync i{width:7px;height:7px;border-radius:50%;background:var(--muted)}
.sync.on i{background:var(--pass)}
.icon-btn{border:1px solid var(--rule);background:var(--sheet);border-radius:8px;width:34px;height:34px;display:grid;place-items:center;padding:0}
.icon-btn:hover{border-color:var(--accent)}
.icon-btn svg{width:17px;height:17px}

/* generic */
.btn{text-decoration:none;display:inline-block;border:1px solid var(--rule);background:var(--sheet);border-radius:8px;padding:6px 14px;font-weight:600;font-size:.92rem;white-space:nowrap}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--sheet)}
.btn.primary:hover{filter:brightness(1.08)}
.btn:disabled{opacity:.55;cursor:progress}
.btn.quiet{border-color:transparent;color:var(--muted);background:none}
.btn.quiet:hover{color:var(--ink);border-color:var(--rule)}
.dots{display:inline-flex;gap:3px;vertical-align:middle}
.dots i{width:7px;height:7px;border-radius:50%;border:1.5px solid var(--accent)}
.dots i.on{background:var(--accent)}
.tick{flex:none;width:17px;height:17px;border:1.5px solid var(--rule);border-radius:4px;display:inline-grid;place-items:center;vertical-align:middle}
.tick.done{background:var(--accent);border-color:var(--accent)}
.tick.done::after{content:"";width:8px;height:4px;border:2px solid var(--sheet);border-top:0;border-right:0;transform:translateY(-1px) rotate(-45deg)}
.tick.tried{border-color:var(--mark);border-style:dashed}
.view{display:none}
.view.on{display:block}

/* dashboard */
.home{max-width:1180px;margin:0 auto;padding:36px 24px 60px}
.hello{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:end;margin-bottom:28px}
.hello h1{font-size:clamp(2rem,4.2vw,3.2rem);line-height:1.02;letter-spacing:-.035em;margin:0;font-weight:800;font-variation-settings:"opsz" 96;max-width:20ch}
.hello p{margin:10px 0 0;color:var(--muted);max-width:52ch}
.hello .cta{display:flex;gap:8px;flex-wrap:wrap}
.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.card{background:var(--sheet);border:1px solid var(--rule);border-radius:14px;padding:20px}
.card h2{font-size:1.05rem;margin:0 0 4px;font-weight:700}
.card .sub{color:var(--muted);font-size:.88rem;margin:0 0 14px}
.track-card{border-top:4px solid var(--c)}
.track-card .line{display:flex;align-items:baseline;gap:10px;margin-bottom:14px}
.track-card .n{font-size:2.1rem;font-weight:800;letter-spacing:-.03em;font-variant-numeric:tabular-nums;color:var(--c)}
.track-card .of{color:var(--muted)}
.topics{display:grid;gap:7px}
.topic{display:grid;grid-template-columns:minmax(0,1fr) 54px;gap:10px;align-items:center;font-size:.9rem;text-decoration:none;padding:3px 6px;margin:0 -6px;border-radius:6px}
.topic:hover{background:var(--sunk)}
.topic .bar{grid-column:1/-1;height:5px;background:var(--sunk);border-radius:3px;overflow:hidden;margin-top:-3px}
.topic .bar b{display:block;height:100%;background:var(--c);border-radius:3px}
.topic .cnt{text-align:right;color:var(--muted);font-variant-numeric:tabular-nums;font-size:.82rem}
.wide{grid-column:1/-1}
.heat-wrap{overflow-x:auto}
.heat{display:grid;grid-auto-flow:column;grid-template-rows:repeat(7,13px);gap:3px;width:max-content}
.heat i{width:13px;height:13px;border-radius:3px;background:var(--sunk);border:1px solid var(--rule)}
.heat i[data-l="1"]{background:color-mix(in srgb,var(--sql) 35%,var(--sheet));border-color:transparent}
.heat i[data-l="2"]{background:color-mix(in srgb,var(--sql) 60%,var(--sheet));border-color:transparent}
.heat i[data-l="3"]{background:var(--sql);border-color:transparent}
.heat i.future{visibility:hidden}
.statrow{display:flex;gap:28px;flex-wrap:wrap;margin-bottom:16px}
.stat b{display:block;font-size:1.35rem;font-variant-numeric:tabular-nums}
.stat span{font-size:.82rem;color:var(--muted)}
.board{list-style:none;margin:0;padding:0;counter-reset:r}
.board li{display:grid;grid-template-columns:28px 28px minmax(0,1fr) auto;gap:10px;align-items:center;padding:7px 0;border-bottom:1px solid var(--rule);font-size:.93rem}
.board li:last-child{border-bottom:0}
.board .rank{color:var(--muted);font-variant-numeric:tabular-nums;text-align:right}
.board img{width:28px;height:28px;border-radius:50%}
.board .me{font-weight:700}
.board .pts{font-variant-numeric:tabular-nums;color:var(--muted);font-size:.86rem}
.switch{display:flex;align-items:center;gap:10px;font-size:.9rem;margin-top:12px;cursor:pointer}
.switch input{width:18px;height:18px;accent-color:var(--accent)}
.note{font-size:.85rem;color:var(--muted)}

/* browser */
.browse{max-width:1180px;margin:0 auto;padding:28px 24px 60px;display:grid;grid-template-columns:230px minmax(0,1fr);gap:28px}
.browse h1{font-size:1.9rem;letter-spacing:-.03em;margin:0 0 4px;font-weight:800}
.tlist{list-style:none;margin:0;padding:0;position:sticky;top:calc(var(--head) + 20px)}
.tlist button{width:100%;display:flex;justify-content:space-between;gap:8px;text-align:left;background:none;border:0;border-radius:8px;padding:7px 10px;font-size:.93rem;color:var(--ink)}
.tlist button:hover{background:var(--sheet)}
.tlist button[aria-pressed="true"]{background:var(--sheet);box-shadow:inset 3px 0 0 var(--accent),0 0 0 1px var(--rule);font-weight:600}
.tlist small{color:var(--muted);font-variant-numeric:tabular-nums}
.filters{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:16px 0}
.search{flex:1 1 220px;display:flex;align-items:center;gap:8px;background:var(--sheet);border:1px solid var(--rule);border-radius:10px;padding:0 12px}
.search svg{width:16px;height:16px;color:var(--muted)}
.search input{border:0;background:none;padding:9px 0;width:100%;outline:none}
.search:focus-within{border-color:var(--accent)}
.seg{display:flex;border:1px solid var(--rule);border-radius:10px;overflow:hidden;background:var(--sheet)}
.seg button{border:0;background:none;padding:7px 12px;font-size:.88rem;font-weight:600;color:var(--muted)}
.seg button+button{border-left:1px solid var(--rule)}
.seg button[aria-pressed="true"]{color:var(--ink);background:color-mix(in srgb,var(--accent) 12%,var(--sheet))}
.plist{background:var(--sheet);border:1px solid var(--rule);border-radius:12px;overflow:hidden}
.prow{display:grid;grid-template-columns:24px 46px minmax(0,1fr) 170px 70px;gap:12px;align-items:center;padding:10px 16px;border-bottom:1px solid var(--rule);text-decoration:none}
.prow:last-child{border-bottom:0}
.prow:hover{background:var(--sunk)}
.prow .num{color:var(--muted);font-variant-numeric:tabular-nums;font-size:.85rem}
.prow .t{font-weight:600}
.prow .cat{color:var(--muted);font-size:.85rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.empty{color:var(--muted);padding:24px 16px;margin:0}
.count-line{font-size:.88rem;color:var(--muted);margin:0 0 8px}

/* workspace */
.ws{display:grid;grid-template-columns:var(--lw,42%) 8px minmax(0,1fr);height:calc(100vh - var(--head) - env(safe-area-inset-top,0px) - env(safe-area-inset-bottom,0px));min-height:520px}
.panel{min-width:0;min-height:0;display:flex;flex-direction:column;background:var(--sheet)}
.left{border-right:1px solid var(--rule)}
.splitter{cursor:col-resize;background:var(--paper);position:relative;touch-action:none}
.splitter::after{content:"";position:absolute;left:3px;top:50%;width:2px;height:36px;margin-top:-18px;border-radius:2px;background:var(--rule)}
.splitter:hover::after,.splitter.drag::after{background:var(--accent)}
.right{border-left:1px solid var(--rule)}
.ws-head{display:flex;align-items:center;gap:8px;padding:10px 16px;border-bottom:1px solid var(--rule)}
.crumb{font-size:.86rem;color:var(--muted);margin-right:auto;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.crumb a{color:var(--muted)}
.tabs{display:flex;gap:2px;padding:0 12px;border-bottom:1px solid var(--rule);overflow-x:auto}
.tabs button{border:0;background:none;padding:10px 12px;font-weight:600;font-size:.92rem;color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-1px;white-space:nowrap}
.tabs button[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--accent)}
.pane{flex:1;overflow:auto;padding:20px 22px 30px}
.pane h1{font-size:clamp(1.5rem,2.2vw,1.9rem);line-height:1.15;letter-spacing:-.025em;font-weight:780;margin:6px 0 12px;font-variation-settings:"opsz" 96}
.meta-line{display:flex;align-items:center;gap:10px;font-size:.85rem;color:var(--muted);flex-wrap:wrap}
.pill{border:1px solid var(--rule);border-radius:99px;padding:1px 10px;font-size:.8rem}
.task{font-size:1.05rem;margin:0 0 18px;max-width:64ch}
.sig{font-family:var(--code);font-size:.88rem;background:var(--sunk);border:1px solid var(--rule);border-radius:8px;padding:10px 12px;margin:0 0 16px;overflow-x:auto;white-space:pre}
.schema{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px}
.schema div{background:var(--sunk);border:1px solid var(--rule);border-radius:8px;padding:8px 10px;font-family:var(--code);font-size:.78rem;line-height:1.6}
.schema .tn{display:flex;justify-content:space-between;align-items:center;font-family:var(--ui);font-size:.92rem;font-weight:700;color:var(--accent);margin-bottom:2px}
.schema .tn button{font-size:.75rem;font-weight:600;border:1px solid var(--rule);background:var(--sheet);border-radius:6px;padding:0 7px;color:var(--muted)}
.schema span{color:var(--muted)}
.ex{list-style:none;margin:0 0 16px;padding:0;display:grid;gap:8px}
.ex li{background:var(--sunk);border:1px solid var(--rule);border-radius:8px;padding:8px 12px;font-family:var(--code);font-size:.82rem;line-height:1.6;overflow-x:auto}
.ex .k{font-family:var(--ui);color:var(--muted);display:inline-block;min-width:70px;font-size:.8rem}
pre.sol{background:var(--sunk);border:1px solid var(--rule);border-radius:8px;padding:12px;overflow-x:auto;font-size:.84rem;line-height:1.55;margin:0 0 10px}
.callout{background:var(--warn-bg);border-radius:8px;padding:10px 12px;font-size:.88rem;margin:0 0 14px}
.tutor-actions{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 14px}
.tutor-out{font-size:.95rem;max-width:66ch}
.tutor-out p{margin:0 0 10px}
.tutor-out pre{background:var(--sunk);border:1px solid var(--rule);border-radius:8px;padding:10px;overflow-x:auto;font-size:.82rem}
.tutor-out ul{margin:0 0 10px;padding-left:20px}
.tutor-q{font-size:.85rem;color:var(--muted);border-left:3px solid var(--accent);padding-left:10px;margin:0 0 10px}

.pad-bar{display:flex;align-items:center;gap:8px;padding:8px 12px;border-bottom:1px solid var(--rule);flex-wrap:wrap}
.pad-bar .file{font-family:var(--code);font-size:.8rem;color:var(--muted);margin-right:auto}
.editor-host{flex:1 1 55%;min-height:200px;position:relative;overflow:hidden}
.editor-host textarea.fallback{width:100%;height:100%;border:0;resize:none;padding:12px;font-family:var(--code);font-size:.88rem;background:var(--sheet);color:var(--ink);tab-size:4}
.trycall{display:flex;align-items:center;gap:8px;padding:6px 12px;border-top:1px solid var(--rule);background:var(--sunk);font-size:.85rem}
.trycall label{color:var(--muted);white-space:nowrap}
.trycall input{flex:1;min-width:0;font-family:var(--code);font-size:.82rem;border:1px solid var(--rule);border-radius:6px;padding:4px 8px;background:var(--sheet)}
.console{flex:1 1 45%;min-height:140px;display:flex;flex-direction:column;border-top:1px solid var(--rule)}
.con-head{display:flex;align-items:center;gap:10px;padding:8px 14px;font-weight:600;font-size:.92rem;border-bottom:1px solid var(--rule);flex-wrap:wrap}
.con-head.pass{background:var(--pass-bg);color:var(--pass)}
.con-head.fail{background:var(--fail-bg);color:var(--fail)}
.con-head .ms{margin-left:auto;font-weight:400;font-size:.8rem;color:var(--muted)}
.con-head .btn{margin-left:auto}
.con-body{flex:1;overflow:auto;padding:12px 14px}
.term{margin:0;font-size:.84rem;line-height:1.55;white-space:pre-wrap;word-break:break-word}
.term.err{color:var(--fail)}
.tablewrap{overflow:auto;max-height:280px;border:1px solid var(--rule);border-radius:8px}
table{border-collapse:collapse;font-family:var(--code);font-size:.79rem;width:100%}
th,td{padding:5px 10px;text-align:left;border-bottom:1px solid var(--rule);white-space:nowrap}
th{position:sticky;top:0;background:var(--sunk);font-family:var(--ui);font-weight:600;font-size:.82rem}
td.num{text-align:right;font-variant-numeric:tabular-nums}
td.null{color:var(--muted);font-style:italic}
tr.extra td{background:var(--fail-bg)}
tr.missing td{background:var(--pass-bg)}
.small{font-size:.82rem;color:var(--muted);margin:8px 0 0}
.h3{font-size:.88rem;font-weight:700;margin:16px 0 6px}
.h3:first-child{margin-top:0}
.tests{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.tests li{border:1px solid var(--rule);border-left:4px solid var(--pass);border-radius:6px;padding:7px 12px;font-family:var(--code);font-size:.8rem;line-height:1.6;overflow-x:auto}
.tests li.bad{border-left-color:var(--fail)}
.tests .k{font-family:var(--ui);color:var(--muted);font-size:.78rem;display:inline-block;min-width:64px}
.tests .v{font-family:var(--ui);font-weight:700;float:right;font-size:.78rem;color:var(--pass)}
.tests li.bad .v{color:var(--fail)}
.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--paper);padding:10px 16px;border-radius:10px;font-size:.92rem;z-index:50;box-shadow:0 6px 24px rgba(0,0,0,.2)}

/* CodeMirror theme */
.CodeMirror{height:100%;font-family:var(--code);font-size:14px;line-height:1.65;background:var(--sheet);color:var(--ink)}
.CodeMirror-gutters{background:var(--sheet);border-right:1.5px solid var(--margin)}
.CodeMirror-linenumber{color:var(--muted);opacity:.75;padding:0 8px 0 4px}
.CodeMirror-cursor{border-left:2px solid var(--accent)}
.CodeMirror-activeline-background{background:color-mix(in srgb,var(--accent) 6%,transparent)}
.CodeMirror-selected,.CodeMirror-focused .CodeMirror-selected{background:color-mix(in srgb,var(--accent) 22%,transparent)}
.CodeMirror-line::selection,.CodeMirror-line>span::selection,.CodeMirror-line>span>span::selection{background:color-mix(in srgb,var(--accent) 22%,transparent)}
.CodeMirror-matchingbracket{color:var(--ink)!important;background:color-mix(in srgb,var(--mark) 40%,transparent);outline:none}
.CodeMirror .cm-keyword{color:var(--kw);font-weight:600}.CodeMirror .cm-string,.CodeMirror .cm-string-2{color:var(--str)}.CodeMirror .cm-number{color:var(--num)}
.CodeMirror .cm-comment{color:var(--com);font-style:italic}.CodeMirror .cm-def{color:var(--def)}.CodeMirror .cm-builtin{color:var(--bi)}
.CodeMirror .cm-atom{color:var(--num)}.CodeMirror .cm-variable-2{color:var(--def)}.CodeMirror .cm-property{color:var(--ink)}.CodeMirror .cm-operator{color:var(--muted)}
.CodeMirror .cm-meta{color:var(--kw)}.CodeMirror .cm-type{color:var(--bi)}.CodeMirror .cm-error{color:var(--fail)}
.CodeMirror-hints{background:var(--sheet);border:1px solid var(--rule);font-family:var(--code);font-size:13px;border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.18);z-index:60}
.CodeMirror-hint{color:var(--ink);padding:2px 8px}
li.CodeMirror-hint-active{background:var(--accent);color:var(--sheet)}

@media (max-width:1000px){
  .cards{grid-template-columns:minmax(0,1fr)}
  .browse{grid-template-columns:minmax(0,1fr)}
  .tlist{position:static;display:flex;gap:6px;overflow-x:auto;padding-bottom:4px}
  .tlist li{flex:none}
  .tlist button{white-space:nowrap}
  .prow{grid-template-columns:24px 40px minmax(0,1fr) 60px}
  .prow .cat{display:none}
}
@media (max-width:860px){
  .ws{display:block;height:auto}
  .splitter{display:none}
  .left,.right{border:0}
  .left{border-bottom:1px solid var(--rule)}
  .pane{max-height:none}
  .editor-host{height:340px;flex:none}
  .pad-bar .file,.keys-note{display:none}
  #reset{margin-right:auto}
  .console{min-height:160px}
  .con-body{max-height:none}
  .hello{grid-template-columns:minmax(0,1fr)}
  .top{gap:10px;padding:0 12px}
  .sync{display:none}
  .nav a{padding:6px 9px}
}
@media (max-width:520px){
  .brand{font-size:1rem}
  .nav a{font-size:.88rem;padding:6px 7px}
  .home,.browse{padding-left:16px;padding-right:16px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* ---------- landing, auth, account ---------- */
.landing{max-width:1100px;margin:0 auto;padding:56px 24px 80px}
.hero{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:40px;align-items:center}
.hero h1{font-size:clamp(2.3rem,5.4vw,4rem);line-height:.98;letter-spacing:-.04em;font-weight:800;margin:0 0 16px;font-variation-settings:"opsz" 96}
.hero p{font-size:1.1rem;color:var(--muted);max-width:46ch;margin:0 0 24px}
.hero .cta{display:flex;gap:10px;flex-wrap:wrap}
.btn.big{padding:11px 20px;font-size:1rem}
.demo{background:var(--sheet);border:1px solid var(--rule);border-radius:14px;overflow:hidden;font-family:var(--code);font-size:.82rem}
.demo .bar{padding:8px 12px;border-bottom:1px solid var(--rule);color:var(--muted)}
.demo pre{margin:0;padding:14px;line-height:1.7;white-space:pre-wrap}
.demo .ok{padding:8px 12px;background:var(--pass-bg);color:var(--pass);font-family:var(--ui);font-weight:700}
.demo .k{color:var(--kw);font-weight:600}.demo .s{color:var(--str)}.demo .f{color:var(--def)}
.tracks3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:56px}
.tracks3 .card h2{font-size:1.2rem}
.tracks3 .n{font-size:2rem;font-weight:800;letter-spacing:-.03em;color:var(--c)}
.tracks3 ul{margin:10px 0 0;padding-left:18px;color:var(--muted);font-size:.9rem}
.how{margin-top:56px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.how h3{margin:0 0 6px;font-size:1rem}
.how p{margin:0;color:var(--muted);font-size:.93rem}
.foot{margin-top:56px;padding-top:20px;border-top:1px solid var(--rule);font-size:.85rem;color:var(--muted);display:flex;gap:16px;flex-wrap:wrap}
.auth{min-height:calc(100vh - var(--head));display:grid;place-items:center;padding:32px 16px}
.auth-card{width:100%;max-width:400px;background:var(--sheet);border:1px solid var(--rule);border-radius:16px;padding:28px}
.auth-card h1{font-size:1.6rem;letter-spacing:-.025em;margin:0 0 4px}
.auth-card .sub{color:var(--muted);margin:0 0 20px;font-size:.95rem}
.field{display:grid;gap:5px;margin-bottom:14px}
.field label{font-weight:600;font-size:.9rem}
.field input{border:1px solid var(--rule);border-radius:9px;padding:10px 12px;background:var(--sheet);font-size:1rem}
.field input:focus{outline:2px solid var(--accent);outline-offset:0;border-color:var(--accent)}
.field small{color:var(--muted);font-size:.8rem}
.auth-card .btn.primary{width:100%;padding:11px;font-size:1rem;text-align:center}
.alt{display:flex;justify-content:space-between;gap:10px;margin-top:14px;font-size:.9rem;flex-wrap:wrap}
.alt a{color:var(--accent);font-weight:600}
.or{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:.85rem;margin:16px 0}
.or::before,.or::after{content:"";flex:1;height:1px;background:var(--rule)}
.google{width:100%;display:flex;align-items:center;justify-content:center;gap:10px;padding:10px}
.msg{border-radius:9px;padding:10px 12px;font-size:.9rem;margin-bottom:14px}
.msg.err{background:var(--fail-bg);color:var(--fail)}
.msg.ok{background:var(--pass-bg);color:var(--pass)}
.account{max-width:640px;margin:0 auto;padding:36px 24px 60px;display:grid;gap:18px}
.account h1{font-size:1.9rem;letter-spacing:-.03em;margin:0}
.account .card h2{margin-bottom:12px}
.row-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.btn.danger{color:var(--fail);border-color:var(--fail)}
.prose{max-width:68ch;margin:0 auto;padding:36px 24px 60px}
.prose h1{letter-spacing:-.03em}
.user-menu{display:flex;align-items:center;gap:8px}
.user-menu a.who{font-size:.9rem;font-weight:600;text-decoration:none;max-width:14ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hintbox{background:var(--warn-bg);border-radius:8px;padding:10px 12px;font-size:.92rem}
.board-wide{max-width:760px;margin:0 auto;padding:36px 24px 60px}
.loading{padding:60px 24px;text-align:center;color:var(--muted)}
@media (max-width:860px){.hero,.tracks3,.how{grid-template-columns:minmax(0,1fr)}.user-menu a.who{display:none}}
.board .avatar{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:color-mix(in srgb,var(--accent) 18%,var(--sheet));color:var(--accent);font-weight:700;font-size:.85rem}
@media (max-width:860px){
  .top{height:auto;flex-wrap:wrap;row-gap:4px;padding:8px 12px}
  .nav{order:3;width:100%;overflow-x:auto;scrollbar-width:none}
  .nav a{white-space:nowrap}
  .tlist{position:static}
}