/* SQL Practice Lab · glass UI on AltSchool colours (navy, blue, orange, yellow) */
:root{
  --bg:#F7F7F5; --bg-2:#FFFFFF;
  --glass:rgba(255,255,255,.72); --glass-2:rgba(255,255,255,.9); --glass-line:rgba(16,24,40,.08); --glass-hi:#FFFFFF;
  --fg:#101828; --muted:#5B6476; --faint:#98A1B2;
  --accent:#0367F2; --orange:#F2541B; --yellow:#F5B800; --green:#1FA463;
  --ok-bg:#ECFDF3; --ok-fg:#067647; --warn-bg:#FFF4ED; --warn-fg:#B93815; --err-bg:#FEF3F2; --err-fg:#B42318;
  --code-bg:#0E1525; --code-fg:#E4E9F2;
  --t-kw:#8AB4FF; --t-fn:#FFD27A; --t-str:#FFB596; --t-num:#9FE3B8; --t-cm:#7A8599;
  --blur:saturate(140%) blur(16px);
  --radius:20px;
  --display:'Sora','Trebuchet MS',Arial,sans-serif; --body:'DM Sans',Arial,sans-serif; --mono:'JetBrains Mono','Courier New',monospace;
  --surface:#FFFFFF; --surface-2:#FAFAF8; --inv-bg:#101828; --inv-fg:#FFFFFF; --link:#C2410C; --hint-bg:#FFFAEB; --hint-line:#FEDF89; --info-bg:#F0F9FF; --info-line:#B9E6FE; --sel-bg:#FFF4ED; --sel-line:#FDD7C4; --dot:#E4E7EC; --tab-sel:#F2F4F7;
  color-scheme:light;
}

*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0;overflow-x:hidden}
body{background:var(--bg);color:var(--fg);font-family:var(--body);font-size:15px;line-height:1.5;-webkit-text-size-adjust:100%;min-height:100vh;display:flex;flex-direction:column;position:relative}
/* colour mesh behind the glass */
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(60vmax 40vmax at 50% -10%,rgba(255,214,72,.18),transparent 60%),radial-gradient(40vmax 30vmax at 100% 100%,rgba(242,84,27,.06),transparent 60%),var(--bg)}

main{flex:1}
button{touch-action:manipulation;font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.wrap{max-width:1240px;margin:0 auto;padding-inline:16px}
.sr{position:absolute;left:-9999px}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.glass,.card,.rail,.results,.mode,header.band .bar{background:var(--glass);border:1px solid var(--glass-line);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);box-shadow:0 1px 2px rgba(16,24,40,.04),0 8px 24px rgba(16,24,40,.06)}

/* header: floating glass pill */
header.band{position:sticky;top:0;z-index:20;padding:12px 0 0;padding-top:calc(12px + env(safe-area-inset-top,0px))}
.bar{display:flex;gap:12px;align-items:center;justify-content:space-between;border-radius:999px;padding:8px 8px 8px 12px;max-width:1208px;margin-inline:auto}
@media (max-width:1240px){.bar{margin-inline:16px}}
.brand{display:flex;gap:10px;align-items:center;background:none;border:0;cursor:pointer;padding:0;text-align:left;min-width:0}
.logo{width:34px;height:34px;flex:none}
.brand-text b{font-family:var(--display);font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.brand .eyebrow{display:none}
.nav{display:flex;gap:6px;align-items:center}
.chip{font-size:13px;padding:7px 12px;border-radius:999px;background:var(--glass-2);border:1px solid var(--glass-line);white-space:nowrap;max-width:40vw;overflow:hidden;text-overflow:ellipsis;cursor:pointer}
.chip strong{color:var(--orange);font-variant-numeric:tabular-nums;display:inline-block}

.chip.bump strong{animation:bump .6s ease}
@keyframes bump{30%{transform:scale(1.35)}}
.navbtn{font:600 14px var(--body);background:transparent;border:0;border-radius:999px;padding:8px 14px;min-height:38px;cursor:pointer;display:inline-flex;gap:8px;align-items:center;color:var(--muted)}
.navbtn:hover{color:var(--fg)}
.navbtn[aria-current="page"]{background:var(--inv-bg);color:var(--inv-fg)}
.live-dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 0 rgba(61,220,132,.6);animation:pulse 2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 7px rgba(61,220,132,0)}100%{box-shadow:0 0 0 0 rgba(61,220,132,0)}}
@media (max-width:640px){.brand-text{display:none}.navbtn{padding:7px 11px;font-size:13px}.chip{max-width:36vw;font-size:12px}}

/* buttons */
.btn{font:600 15px var(--body);border-radius:14px;padding:10px 18px;min-height:46px;cursor:pointer;border:1px solid transparent;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:transform .12s ease,box-shadow .2s ease,background .2s ease}
.btn:active:not([disabled]){transform:scale(.98)}
.btn.lg{font-size:17px;padding:14px 28px;min-height:56px;border-radius:16px}
.btn.sm{min-height:34px;padding:4px 12px;font-size:13px;border-radius:10px}
.btn.primary{background:linear-gradient(135deg,#FF7A45,#F2541B);color:#fff;box-shadow:0 8px 20px rgba(242,84,27,.25)}
.btn.primary:hover:not([disabled]){box-shadow:0 10px 26px rgba(242,84,27,.35)}
.btn.blue{background:#101828;color:#fff;box-shadow:0 8px 20px rgba(16,24,40,.18)}
.btn.plain{background:var(--glass-2);border-color:var(--glass-line)}
.btn.plain:hover:not([disabled]){background:var(--glass-hi)}
.btn.ghost{background:rgba(255,255,255,.06);color:#DDE5F5;border-color:rgba(255,255,255,.14)}
.btn[disabled]{opacity:.4;cursor:not-allowed;box-shadow:none}

/* start */
.hero{min-height:calc(100vh - 150px);display:grid;place-items:center;padding-block:40px}
.hero-copy{width:100%;max-width:640px;display:flex;flex-direction:column;gap:22px;align-items:center;text-align:center}
.hero-art{display:none}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);padding:6px 14px;border-radius:999px;background:var(--glass);border:1px solid var(--glass-line);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur)}
.kicker::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green)}
.hero h1{font-family:var(--display);font-size:clamp(38px,8vw,72px);line-height:1;margin:0;letter-spacing:-.035em;font-weight:800}
.hero h1 .hl{background:linear-gradient(90deg,#F5B800,#F2541B);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{margin:0;color:var(--muted);font-size:17px;max-width:40ch}
.start-card{width:100%;border-radius:28px;padding:22px;display:flex;flex-direction:column;gap:16px;text-align:left}
.field{display:flex;flex-direction:column;gap:8px}
.label{font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.field input,.input{font:17px var(--body);padding:14px 16px;border-radius:14px;border:1px solid var(--glass-line);background:var(--glass-2);color:var(--fg);width:100%;outline:none;transition:border-color .2s,box-shadow .2s}
.field input::placeholder{color:var(--faint)}
.field input:focus,.input:focus{border-color:var(--accent);box-shadow:0 0 0 4px rgba(76,141,255,.2)}
.modes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.mode{display:flex;flex-direction:column;gap:4px;text-align:left;border-radius:16px;padding:14px;cursor:pointer;position:relative;transition:border-color .2s,transform .12s;box-shadow:none}
.mode:hover{transform:translateY(-2px)}
.mode[aria-pressed="true"]{border-color:var(--c);background:color-mix(in srgb,var(--c) 16%,transparent);box-shadow:0 0 0 1px var(--c),0 10px 30px color-mix(in srgb,var(--c) 25%,transparent)}
.mode b{font-family:var(--display);font-size:16px;display:flex;align-items:center;justify-content:space-between;gap:6px}
.mode .lvl{display:inline-flex;gap:3px}
.mode .lvl i{width:6px;height:6px;border-radius:50%;background:var(--glass-hi)}
.mode .lvl i.on{background:var(--c)}
.mode .pts{font-family:var(--mono);font-size:12px;color:var(--muted)}
.mode .blurb{color:var(--faint);font-size:13px}
@media (max-width:560px){.modes{grid-template-columns:minmax(0,1fr)}.mode{flex-direction:row;align-items:center;justify-content:space-between;flex-wrap:wrap}.mode .blurb{width:100%}}
.err-text{color:var(--err-fg);font-size:14px;min-height:1.2em;text-align:center}
.start-card .btn{width:100%}

/* lab */
.labtop{display:flex;gap:14px;align-items:center;padding-block:22px 6px;flex-wrap:wrap}
.modebar{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;padding:4px;border-radius:999px;background:var(--glass);border:1px solid var(--glass-line);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur)}
.modebar button{flex:0 0 auto;font:600 14px var(--body);padding:7px 14px;min-height:36px;border-radius:999px;border:0;background:transparent;color:var(--muted);cursor:pointer;display:inline-flex;align-items:center;gap:8px}
.modebar button::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--c)}
.modebar button[aria-pressed="true"]{background:var(--inv-bg);color:var(--inv-fg)}
.modebar small{font-family:var(--mono);opacity:.7}
.progress{flex:1;min-width:120px;height:6px;background:var(--glass-2);border-radius:999px;overflow:hidden}
.progress-fill{height:100%;width:0;background:linear-gradient(90deg,#F5B800,#F2541B);border-radius:999px;transition:width .6s ease}
.lab{display:grid;grid-template-columns:320px minmax(0,1fr);gap:16px;padding-block:10px 32px}
@media (max-width:900px){.lab{grid-template-columns:minmax(0,1fr)}.rail{order:2}}
.rail{border-radius:var(--radius);min-width:0;align-self:start;overflow:hidden}
@media (min-width:901px){.rail{position:sticky;top:84px}}
.tabs{display:flex;gap:4px;padding:6px;border-bottom:1px solid var(--glass-line);overflow-x:auto;scrollbar-width:none}
.tabs button{flex:1 0 auto;background:none;border:0;border-radius:10px;padding:8px 10px;min-height:36px;font:600 13px var(--body);color:var(--muted);cursor:pointer;white-space:nowrap;display:inline-flex;align-items:center;justify-content:center;gap:4px}
.tabs button[aria-selected="true"]{background:var(--tab-sel);color:var(--fg)}
.tabs .lock{opacity:.6}
.panel{padding:10px;display:flex;flex-direction:column;gap:6px;max-height:calc(100vh - 200px);overflow:auto}
.panel>*{flex-shrink:0}
@media (max-width:900px){.panel{max-height:420px}}
.q{display:flex;gap:10px;align-items:flex-start;text-align:left;background:transparent;border:1px solid transparent;border-radius:12px;padding:10px 12px;cursor:pointer;min-height:44px;font-size:14px;color:var(--muted);transition:background .15s}
.q:hover{background:#F9FAFB}
.q[aria-current="true"]{background:var(--sel-bg);border-color:var(--sel-line);color:var(--fg)}
.q .num{font-family:var(--mono);font-weight:600;color:var(--faint);min-width:20px}
.q .tag{margin-left:auto;font-size:12px;font-weight:700;white-space:nowrap;font-family:var(--mono);color:var(--faint)}
.q .tag.ok{color:var(--ok-fg)}
.tbl{border:1px solid var(--glass-line);border-radius:12px;overflow:hidden}
.tbl-head{display:flex;justify-content:space-between;gap:8px;padding:10px 12px;background:var(--glass);cursor:pointer;border:0;width:100%;text-align:left;min-height:44px}
.tbl-head b{font-family:var(--mono);font-size:14px}
.tbl-head span{font-size:12px;color:var(--muted)}
.cols{list-style:none;margin:0;padding:6px 12px 10px;display:flex;flex-direction:column;gap:2px}
.cols li{font-family:var(--mono);font-size:13px;display:flex;justify-content:space-between;gap:8px;color:var(--muted)}
.k{font-style:normal;font-family:var(--body);font-size:10px;font-weight:700;letter-spacing:.06em;padding:1px 6px;border-radius:4px;color:#fff;white-space:nowrap}
.k.pk{background:var(--accent)} .k.fk{background:var(--orange)}
.note{font-size:13px;color:var(--muted);margin:0}
.cheat{display:flex;flex-direction:column;gap:8px}
.cheat div{border:1px solid var(--glass-line);border-radius:12px;padding:10px 12px;background:var(--glass)}
.cheat b{display:block;font-size:12px;margin-bottom:4px;color:var(--muted)}
.cheat code{display:block;font:13px/1.55 var(--mono);white-space:pre-wrap;color:var(--accent)}

.cheat p{margin:4px 0 0;font-size:12px;color:var(--faint)}
.locked{padding:28px 14px;text-align:center;color:var(--faint);font-size:14px}
.ex{display:flex;flex-direction:column;text-align:left;background:transparent;border:1px solid var(--glass-line);border-radius:12px;padding:10px 12px;cursor:pointer;min-height:44px}
.ex:hover{background:var(--glass)}
.ex small{color:var(--faint);font-family:var(--mono);font-size:12px}

.bench{display:flex;flex-direction:column;gap:14px;min-width:0}
.card{border-radius:var(--radius);padding:20px;display:flex;flex-direction:column;gap:12px}
.qcard{position:relative;overflow:hidden}
.qcard::before{content:"";position:absolute;inset:0 auto 0 0;width:4px;background:var(--c,var(--yellow));box-shadow:0 0 20px var(--c,var(--yellow))}
.qmeta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:space-between}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.eyebrow.blue{color:var(--accent)}
.badge{font:600 12px var(--mono);padding:4px 10px;border-radius:999px;background:var(--glass-2);border:1px solid var(--glass-line);white-space:nowrap}
.badge.ok{background:var(--ok-bg);color:var(--ok-fg);border-color:transparent}
.qcard h2{font-family:var(--display);font-size:clamp(20px,2.8vw,26px);line-height:1.25;margin:0;letter-spacing:-.015em;text-wrap:balance}
.qfoot{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between}
.steps{display:flex;gap:6px;flex-wrap:wrap}
.steps button{width:28px;height:28px;border-radius:50%;border:1px solid var(--glass-line);background:var(--glass);color:var(--muted);font:600 11px var(--mono);cursor:pointer;padding:0;transition:transform .12s}
.steps button:hover{transform:scale(1.1)}
.steps button.done{background:var(--green);color:#fff;border-color:transparent}
.steps button[aria-current="true"]{border-color:var(--orange);color:var(--fg);box-shadow:0 0 0 3px rgba(255,106,51,.3)}
.steps button.done[aria-current="true"]{color:#fff}
.hintbox{background:var(--hint-bg);border:1px solid var(--hint-line);border-radius:12px;padding:10px 12px;font-size:14px}
pre.answer{background:var(--code-bg);color:var(--code-fg);font:13px/1.6 var(--mono);padding:12px;border-radius:12px;overflow-x:auto;margin:0;white-space:pre-wrap}

.editor{background:var(--code-bg);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);overflow:hidden;-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);box-shadow:0 20px 50px rgba(0,0,0,.3)}
.editor-bar{display:flex;gap:10px;align-items:center;justify-content:space-between;padding:10px 12px 0 16px}
.dots{display:inline-flex;gap:6px}
.dots i{width:10px;height:10px;border-radius:50%;background:#FF5A21;display:inline-block}
.dots i:nth-child(2){background:#FFD648}.dots i:nth-child(3){background:#3DDC84}
.editor-tip{display:none}
.code-wrap{position:relative;min-height:200px}
.code-hl,.code-wrap textarea{margin:0;padding:12px 18px 18px;font:16px/1.65 var(--mono);tab-size:2;white-space:pre-wrap;word-wrap:break-word;overflow-wrap:break-word;letter-spacing:0}
.code-hl{position:absolute;inset:0;overflow:hidden;color:var(--code-fg);pointer-events:none}
.code-wrap textarea{position:relative;display:block;width:100%;min-height:200px;resize:vertical;background:transparent;color:transparent;caret-color:#FFD648;border:0;outline:none;-webkit-text-fill-color:transparent}
.code-wrap textarea::selection{background:rgba(76,141,255,.35);-webkit-text-fill-color:transparent}
.t-kw{color:var(--t-kw);font-weight:600}.t-fn{color:var(--t-fn)}.t-str{color:var(--t-str)}.t-num{color:var(--t-num)}.t-cm{color:var(--t-cm);font-style:italic}
.keys{display:flex;gap:6px;overflow-x:auto;padding:0 12px 12px;scrollbar-width:none}
.keys button{flex:0 0 auto;font:600 12px var(--mono);color:#DDE5F5;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.1);border-radius:999px;padding:6px 12px;min-height:34px;cursor:pointer}
.keys button:active{background:rgba(255,255,255,.18)}
@media (min-width:901px){.keys{display:none}}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.actions .btn.plain{min-width:96px}
@media (max-width:900px){
  .actions{position:sticky;bottom:10px;z-index:5;padding:8px;border-radius:20px;background:var(--glass-2);border:1px solid var(--glass-line);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);margin-bottom:calc(env(safe-area-inset-bottom,0px))}
  .actions .btn{flex:1}
}
.msg{border-radius:16px;padding:12px 16px;font-size:14px;border:1px solid transparent;-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur)}
.msg ul{margin:6px 0 0;padding-left:18px}
.msg li{margin-top:3px}
.msg.ok{background:var(--ok-bg);color:var(--ok-fg);border-color:rgba(61,220,132,.2)}
.msg.warn{background:var(--warn-bg);color:var(--warn-fg);border-color:rgba(255,122,74,.2)}
.msg.err{background:var(--err-bg);color:var(--err-fg);border-color:rgba(255,90,90,.2)}
.msg code{font-family:var(--mono);font-size:13px;word-break:break-word}
.msg.win{display:flex;gap:14px;align-items:center}
.msg.win .pop{font-family:var(--display);font-size:30px;font-weight:800;line-height:1;animation:pop .5s ease}
@keyframes pop{0%{transform:scale(.4);opacity:0}70%{transform:scale(1.15)}100%{transform:scale(1);opacity:1}}
.msg .cost{display:block;margin-top:6px;opacity:.75;font-size:13px}
.results{border-radius:var(--radius);min-width:0;overflow:hidden}
.results-head{display:flex;justify-content:space-between;gap:8px;padding:12px 16px;border-bottom:1px solid var(--glass-line);font-size:13px;color:var(--muted)}
.results-head b{color:var(--fg)}
.scroll{overflow:auto;max-height:380px;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{padding:9px 16px;border-bottom:1px solid var(--glass-line);text-align:left;white-space:nowrap}
th{position:sticky;top:0;background:var(--glass-2);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);font-family:var(--mono);font-size:11px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
tbody tr:hover td{background:var(--glass)}
td.num{text-align:right;font-variant-numeric:tabular-nums;font-family:var(--mono);font-size:13px}
td.null{color:var(--faint);font-style:italic}
.empty{padding:36px 16px;text-align:center;color:var(--faint)}

/* leaderboard */
.board-head{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:flex-end;padding-block:32px 4px}
.board-head h1{font-family:var(--display);font-size:clamp(32px,6vw,52px);margin:10px 0 0;letter-spacing:-.03em;font-weight:800}
.board-head .note{margin-top:4px}
.podium{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;align-items:end;padding-block:24px 8px;max-width:720px;margin-inline:auto}
.podium:empty{display:none}
.pod{display:flex;flex-direction:column;align-items:center;gap:4px;text-align:center;min-width:0}
.pod .avatar{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;font:800 20px var(--display);color:#081430;margin-bottom:4px}
.pod.p1 .avatar{background:linear-gradient(135deg,#FFE58A,#FFC21A);width:66px;height:66px;font-size:24px;box-shadow:0 0 30px rgba(255,214,72,.5)}
.pod.p2 .avatar{background:linear-gradient(135deg,#F2F4F7,#D0D5DD)}
.pod.p3 .avatar{background:linear-gradient(135deg,#FFD5C4,#FF9C78)}
.pod .pname{font-weight:700;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pod .ppts{font:600 13px var(--mono);color:var(--muted)}
.pod .block{width:100%;border-radius:18px 18px 6px 6px;display:flex;align-items:flex-start;justify-content:center;padding-top:12px;font-family:var(--display);font-weight:800;font-size:28px;color:var(--muted);background:var(--glass);border:1px solid var(--glass-line);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);margin-top:8px}
.pod.p1 .block{height:120px;color:#B98500;background:linear-gradient(180deg,rgba(255,214,72,.35),var(--glass))}
.pod.p2 .block{height:88px}
.pod.p3 .block{height:66px}
.pod.p1{order:2}.pod.p2{order:1}.pod.p3{order:3}
.boardview{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:16px;padding-block:16px 40px;align-items:start}
@media (max-width:900px){.boardview{grid-template-columns:minmax(0,1fr)}}
.boardview>.card{padding:6px}
.side{display:flex;flex-direction:column;gap:16px;min-width:0}
.lb td{border-bottom-color:transparent}
.lb tbody tr td:first-child{border-radius:12px 0 0 12px}.lb tbody tr td:last-child{border-radius:0 12px 12px 0}
.lb th{background:transparent;-webkit-backdrop-filter:none;backdrop-filter:none}
.lb td.rank{font-family:var(--display);font-weight:800;width:52px;color:var(--faint)}
.lb tr.top1 td.rank{color:#B98500} .lb tr.top2 td.rank{color:#6B7280} .lb tr.top3 td.rank{color:#C2410C}
.lb td.name{white-space:normal;min-width:120px;font-weight:600}
.lb td.total,.lb th.r{text-align:right}
.lb td.total{font-family:var(--display);font-weight:800;font-size:16px}
.lb td.num{color:var(--muted)}
.lb tr.mine td{background:rgba(255,214,72,.12)!important}
.lb tr.mine td.name::after{content:" · you";color:var(--muted);font-weight:400}
.lb tr.flash td{animation:flash 1.2s ease}
@keyframes flash{0%{background:rgba(76,141,255,.35)}}
.me{align-items:flex-start}
.big{font-family:var(--display);font-size:56px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums;letter-spacing:-.03em;background:linear-gradient(90deg,#F5B800,#F2541B);-webkit-background-clip:text;background-clip:text;color:transparent}
.split{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;width:100%}
.split div{background:var(--glass);border:1px solid var(--glass-line);border-radius:12px;padding:8px 10px}
.split small{display:block;color:var(--muted);font-size:11px}
.split b{font-family:var(--mono)}
@media (max-width:560px){.lb .hide-sm,.lb td.hide-sm{display:none}}

/* projector */
.proj{position:fixed;inset:0;z-index:50;background:#0E1525;color:#EEF2FB;padding:5vh 6vw;overflow:auto;display:flex;flex-direction:column;gap:4vh}
.proj::before{content:"";position:fixed;inset:0;z-index:-1;background:radial-gradient(60vmax 40vmax at 50% -10%,rgba(255,214,72,.15),transparent 60%)}
.proj-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}
.proj-head .kicker{color:#C9D4EA;background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.12)}
.proj-head h1{font-family:var(--display);font-size:clamp(40px,6vw,88px);margin:12px 0 0;letter-spacing:-.03em}
.proj-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:1.4vh}
.proj-list li{display:grid;grid-template-columns:5vw minmax(0,1fr) auto;gap:2vw;align-items:center;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);border-radius:22px;padding:1.8vh 2.4vw;font-size:clamp(18px,2.6vw,40px)}
.proj-list .r{font-family:var(--display);font-weight:800;color:#6F7FA3}
.proj-list li:nth-child(1){background:linear-gradient(90deg,rgba(255,214,72,.3),rgba(255,214,72,.08));border-color:rgba(255,214,72,.5)}
.proj-list li:nth-child(1) .r{color:#FFD648}
.proj-list li:nth-child(2) .r{color:#9DBDFF}.proj-list li:nth-child(3) .r{color:#FF9C78}
.proj-list .n{font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.proj-list .t{font-family:var(--display);font-weight:800}

/* toast */
.toast{width:max-content;position:fixed;left:50%;bottom:calc(96px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);z-index:60;background:rgba(8,20,48,.75);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);border:1px solid rgba(255,255,255,.15);color:#fff;padding:12px 20px;border-radius:999px;font-weight:700;box-shadow:0 12px 30px rgba(0,0,0,.3);animation:rise .35s ease;max-width:calc(100vw - 32px)}
@media (min-width:901px){.toast{bottom:28px}}
@keyframes rise{from{transform:translate(-50%,16px);opacity:0}}

footer.site{padding-block:20px calc(20px + env(safe-area-inset-bottom,0px));text-align:center;color:var(--faint);font-size:13px}
footer.site b{color:var(--orange)}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){
  .glass,.card,.rail,.results,.mode,header.band .bar,.modebar,.kicker{background:var(--bg-2)}
}

/* help button, link */
.navbtn.icon{width:38px;padding:0;justify-content:center;font:700 16px var(--display);border:1px solid var(--glass-line);background:var(--glass)}
.linkbtn{background:none;border:0;color:var(--muted);font:600 14px var(--body);cursor:pointer;text-decoration:underline;text-underline-offset:4px;padding:6px}
.linkbtn:hover{color:var(--fg)}

/* learner guide */
.guide{position:fixed;inset:0;z-index:70;display:grid;place-items:center;padding:16px;background:rgba(16,24,40,.35);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);animation:fade .25s ease}
@keyframes fade{from{opacity:0}}
.guide-card{position:relative;width:100%;max-width:460px;border-radius:28px;padding:26px 24px 20px;display:flex;flex-direction:column;gap:10px;text-align:center;align-items:center;background:var(--glass-2)}
.guide-card h2{font-family:var(--display);font-size:24px;margin:0;letter-spacing:-.02em}
.guide-card p{margin:0;color:var(--muted);font-size:15px;max-width:34ch;min-height:3em}
.guide-x{position:absolute;top:12px;right:12px;width:36px;height:36px;border-radius:50%;border:1px solid var(--glass-line);background:var(--glass);font-size:22px;line-height:1;cursor:pointer;color:var(--muted)}
.guide-art{width:100%;height:150px;border-radius:20px;background:var(--code-bg);border:1px solid rgba(255,255,255,.08);display:grid;place-items:center;overflow:hidden;margin-bottom:6px}
.guide-art svg{width:100%;height:100%}
.guide-dots{display:flex;gap:6px;margin-top:4px}
.guide-dots i{width:7px;height:7px;border-radius:999px;background:var(--glass-hi);transition:width .25s,background .25s}
.guide-dots i.on{width:22px;background:var(--orange)}
.guide-nav{display:flex;gap:8px;width:100%;margin-top:8px}
.guide-nav .btn{flex:1}
.ga-code{font:600 15px var(--mono);fill:#DDE5F5}
.ga-kw{fill:#7FB2FF}
.ga-muted{font:500 12px var(--body);fill:#9AA8C6}
.pulse-ring{animation:ring 1.6s ease-out infinite;transform-origin:center;transform-box:fill-box}
@keyframes ring{0%{opacity:.9;transform:scale(.8)}100%{opacity:0;transform:scale(1.6)}}

.navbtn .short{display:none}
@media (max-width:640px){
  .bar{padding:6px;gap:6px}
  .brand{display:none}
  .bar{justify-content:flex-end}
  .chip{margin-right:auto;max-width:44vw}
  .navbtn .long{display:none}.navbtn .short{display:inline}
}
.podium{display:flex;justify-content:center;align-items:flex-end}
.pod{width:min(230px,32%)}

/* ---------- games ---------- */
.games{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.game{display:flex;gap:12px;align-items:center;text-align:left;border-radius:16px;padding:14px;cursor:pointer;background:var(--glass);border:1.5px solid var(--glass-line);color:var(--fg);font:inherit;transition:border-color .2s,transform .12s}
.game:hover{transform:translateY(-1px)}
.game[aria-pressed="true"]{border-color:var(--orange,#F2541B);box-shadow:0 0 0 3px rgba(242,84,27,.12)}
.game .gicon{flex:none;width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:rgba(16,24,40,.06);color:var(--fg)}
.game[aria-pressed="true"] .gicon{background:#F2541B;color:#fff}
.game .gicon svg{width:24px;height:24px}
.game b{display:block;font-family:var(--display);font-size:16px}
.game small{display:block;color:var(--muted);font-size:13px;margin-top:2px}
.gameswitch{display:flex;gap:4px;padding:4px;border-radius:999px;background:var(--glass);border:1px solid var(--glass-line);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur)}
.gameswitch button{display:flex;align-items:center;gap:6px;border:0;background:transparent;color:var(--muted);font:600 14px var(--body);padding:7px 14px;border-radius:999px;cursor:pointer}
.gameswitch button svg{width:16px;height:16px}
.gameswitch button[aria-pressed="true"]{background:var(--inv-bg);color:var(--inv-fg)}

/* ---------- API request builder ---------- */
.reqb-title{font:600 13px var(--mono);color:#9AA6BD;margin-right:auto;margin-left:6px}
.reqb-body{display:flex;flex-direction:column;gap:10px;padding:14px 16px 16px}
.urlrow{display:flex;gap:8px;min-width:0}
.reqb select.method{flex:none;appearance:none;-webkit-appearance:none;border:0;border-radius:10px;padding:10px 12px;font:700 14px var(--mono);color:#fff;background:#1FA463;cursor:pointer}
.reqb select.method.m-POST{background:#C98F00}.reqb select.method.m-PUT{background:#3B6FD8}.reqb select.method.m-DELETE{background:#D9441A}
.reqb input,.reqb textarea{width:100%;min-width:0;background:rgba(255,255,255,.06);color:var(--code-fg);border:1px solid rgba(255,255,255,.14);border-radius:10px;padding:10px 12px;font:15px/1.5 var(--mono);outline:none}
.reqb input:focus,.reqb textarea:focus{border-color:#FFD648;box-shadow:0 0 0 3px rgba(255,214,72,.15)}
.reqb input::placeholder,.reqb textarea::placeholder{color:#5E6B85}
.reqb textarea{resize:vertical;min-height:120px;tab-size:2}
.hdr{display:grid;grid-template-columns:140px minmax(0,1fr) auto;gap:8px;align-items:center}
.hdr label,.bodyhead label{font:600 13px var(--mono);color:#9AA6BD}
.hdr:not(:has(button)){grid-template-columns:140px minmax(0,1fr)}
.bodywrap{display:flex;flex-direction:column;gap:6px}
.bodyhead{display:flex;justify-content:space-between;align-items:center;gap:8px}
.reqb .btn.ghost{white-space:nowrap}
@media (max-width:640px){.hdr,.hdr:not(:has(button)){grid-template-columns:minmax(0,1fr) auto}.hdr label{grid-column:1/-1}.hdr:not(:has(button)) input{grid-column:1/-1}.urlrow input{font-size:14px}}
.status{display:inline-block;margin-left:8px;padding:2px 10px;border-radius:999px;font:700 12px var(--mono)}
.status:empty{display:none}
.status.s-ok{background:#DCFCE7;color:#166534}.status.s-err{background:#FEE4E2;color:#B42318}.status.s-net{background:#EEF2F6;color:#475467}
pre.json{margin:0;padding:14px 16px;font:13px/1.6 var(--mono);white-space:pre-wrap;word-break:break-word;color:var(--fg)}
.j-k{color:#7A2E0E}.j-s{color:#067647}.j-n{color:#1849A9}.j-l{color:#B54708}
.answerbox{display:flex;flex-direction:column;gap:8px;border-top:1px dashed var(--glass-line);padding-top:12px}
.choices{display:flex;flex-wrap:wrap;gap:8px}
.choice{border:1.5px solid var(--glass-line);background:var(--surface);color:var(--fg);font:600 14px var(--body);padding:9px 14px;border-radius:999px;cursor:pointer}
.choice:hover{border-color:#F2541B}
.answerbox .input{background:var(--surface);color:var(--fg);border:1px solid var(--glass-line);border-radius:10px;padding:9px 12px;font:15px var(--body)}
.doc{background:var(--surface-2);border:1px solid var(--glass-line);border-radius:12px;padding:10px 12px;margin-bottom:8px;display:flex;flex-direction:column;gap:6px}
.doc p{margin:0;font-size:13px;line-height:1.5}
.doc small{color:var(--muted);font-size:12px}
.doc pre{margin:0;background:var(--code-bg);color:var(--code-fg);font:12px/1.5 var(--mono);padding:8px 10px;border-radius:8px;white-space:pre-wrap;word-break:break-all}
.doc-h{display:flex;align-items:center;gap:8px;min-width:0}
.doc-h code{font:600 13px var(--mono);word-break:break-all}
.mth{flex:none;font:700 11px var(--mono);color:#fff;padding:3px 7px;border-radius:6px;background:#667085}
.mth.m-GET,.mth.m-ok{background:#1FA463}.mth.m-POST{background:#C98F00}.mth.m-PUT{background:#3B6FD8}.mth.m-DELETE,.mth.m-err{background:#D9441A}
.code-row{display:flex;gap:8px;align-items:center;font-size:13px}
code.inl{font:12px var(--mono);background:rgba(16,24,40,.06);padding:1px 5px;border-radius:5px;word-break:break-all}
.doc .btn{align-self:flex-start}

/* ---------- sign-in ---------- */
.field input:disabled{opacity:.7;cursor:not-allowed}
.code-in{font:700 26px var(--mono)!important;letter-spacing:.5em;text-align:center}
.code-links{display:flex;justify-content:space-between;flex-wrap:wrap;gap:4px}
.signed{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap;font-size:14px;color:var(--muted);background:rgba(31,164,99,.08);border:1px solid rgba(31,164,99,.2);border-radius:12px;padding:10px 14px}
.signed b{color:var(--fg);word-break:break-all}
.start-note{margin:0;text-align:center;font-size:14px}

/* ---------- feedback ---------- */
.fb-fab{position:fixed;right:20px;bottom:20px;z-index:40;display:flex;align-items:center;gap:8px;border:1px solid var(--glass-line);background:var(--inv-bg);color:var(--inv-fg);font:600 14px var(--body);padding:11px 16px 11px 13px;border-radius:999px;cursor:pointer;box-shadow:0 10px 30px rgba(16,24,40,.22);transition:transform .15s}
.fb-fab:hover{transform:translateY(-2px)}
.fb-fab svg{width:20px;height:20px;color:#F5B800;animation:fbglow 3.2s ease-in-out infinite}
@keyframes fbglow{0%,80%,100%{filter:none}88%{filter:drop-shadow(0 0 6px #F5B800)}}
@media (prefers-reduced-motion:reduce){.fb-fab svg{animation:none}}
.fb{position:fixed;inset:0;z-index:60;background:rgba(16,24,40,.35);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:flex;align-items:flex-end;justify-content:flex-end;padding:20px}
.fb-card{position:relative;width:min(440px,100%);max-height:calc(100vh - 40px);overflow:auto;border-radius:24px;padding:24px;background:var(--surface);animation:fbup .28s ease}
@keyframes fbup{from{transform:translateY(16px);opacity:0}to{transform:none;opacity:1}}
.fb-card #fbBody{display:flex;flex-direction:column;gap:10px}
.fb-card h2{font-family:var(--display);font-size:24px;margin:4px 0 0}
.fb-card .note{margin:0 0 6px}
.fb-card .kicker{align-self:flex-start}
.fb-moods{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-bottom:6px}
.fb-mood{display:flex;flex-direction:column;align-items:center;gap:6px;padding:12px 4px;border-radius:14px;border:1.5px solid var(--glass-line);background:var(--surface);color:var(--muted);font:600 12px var(--body);cursor:pointer;text-align:center}
.fb-mood svg{width:24px;height:24px}
.fb-mood[aria-checked="true"]{border-color:#F2541B;color:#F2541B;background:rgba(242,84,27,.06)}
.fb-wants{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:6px}
.fb-want{border:1.5px solid var(--glass-line);background:var(--surface);color:var(--fg);font:600 13px var(--body);padding:7px 12px;border-radius:999px;cursor:pointer}
.fb-want[aria-pressed="true"]{background:var(--inv-bg);border-color:var(--inv-bg);color:var(--inv-fg)}
.fb-card textarea{width:100%;font:15px/1.5 var(--body);padding:12px 14px;border-radius:14px;border:1px solid var(--glass-line);background:var(--surface);color:var(--fg);resize:vertical;outline:none}
.fb-card textarea:focus{border-color:#F2541B;box-shadow:0 0 0 4px rgba(242,84,27,.12)}
.fb-hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.fb-done{display:flex;flex-direction:column;align-items:center;text-align:center;gap:10px;padding:24px 8px}
.fb-done svg{width:64px;height:64px;animation:pop .5s ease}
@media (max-width:640px){.fb{padding:0;align-items:flex-end;justify-content:stretch}.fb-card{width:100%;border-radius:24px 24px 0 0;max-height:92vh;padding:20px 16px calc(20px + env(safe-area-inset-bottom))}.fb-moods{grid-template-columns:repeat(2,minmax(0,1fr))}.fb-fab{right:14px;bottom:14px;padding:12px}.fb-fab span{display:none}}
.site .linkbtn{font-size:inherit;padding:0}

/* ---------- animated logo: the barbell does a rep, the cursor blinks ---------- */
.logo .lg-cursor{animation:lgblink 1.1s steps(1) infinite}
.logo .lg-bar{transform-box:fill-box;transform-origin:center}
.brand:hover .logo .lg-bar,.logo.lift .lg-bar{animation:lgrep .9s cubic-bezier(.4,0,.2,1)}
@keyframes lgblink{0%,55%{opacity:1}56%,100%{opacity:0}}
@keyframes lgrep{0%{transform:none}35%{transform:translateY(-5px)}55%{transform:translateY(-5px)}100%{transform:none}}
@media (prefers-reduced-motion:reduce){.logo .lg-cursor,.logo .lg-bar{animation:none!important}}

/* ---------- six games ---------- */
.games{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:640px){.games{grid-template-columns:repeat(2,minmax(0,1fr))}.game{padding:12px;gap:10px}.game .gicon{width:34px;height:34px}.game small{font-size:12px}}
.gameswitch{overflow-x:auto;scrollbar-width:none;max-width:100%}
.gameswitch::-webkit-scrollbar{display:none}
.gameswitch button{white-space:nowrap;flex:none}
.labtop{min-width:0}.labtop>*{min-width:0}
.field.two{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.field.two>div{display:flex;flex-direction:column;gap:8px;min-width:0}
.field select.input{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%23667085' stroke-width='1.6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;background-size:12px;padding-right:36px;font-size:15px}
@media (max-width:480px){.field.two{grid-template-columns:1fr}}
.lb small.trk{display:block;font-weight:500;font-size:12px;color:var(--muted)}
.split{flex-wrap:wrap}
.mini-rail{padding:18px;display:flex;flex-direction:column;gap:14px}
.mini-head h2{font-family:var(--display);font-size:22px;margin:0 0 6px}
.mini-head .note{margin:0;line-height:1.5}
.mini-cheat{display:flex;flex-direction:column;gap:6px}
.ch-row{display:grid;grid-template-columns:auto 1fr;gap:10px;font-size:13px;padding:7px 10px;border-radius:10px;background:var(--surface-2);border:1px solid var(--glass-line)}
.ch-row b{font-family:var(--mono);font-size:12.5px;min-width:42px}
.art{min-width:0}
.art-pre{margin:0;background:var(--code-bg);color:var(--code-fg);font:13px/1.55 var(--mono);padding:12px 14px;border-radius:12px;white-space:pre-wrap;word-break:break-word;overflow-x:auto}
.art-pre.json{max-height:420px;overflow:auto}
.http{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.http-col,.evid-card{display:flex;flex-direction:column;gap:6px;min-width:0}
.evid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.evid-card{background:var(--glass);border:1px solid var(--glass-line);border-radius:14px;padding:12px}
.evid-card.bad{border-color:var(--glass-line)}
@media (max-width:640px){.http{grid-template-columns:1fr}}
.choices.long{flex-direction:column;align-items:stretch}
.choices.long .choice{border-radius:14px;text-align:left;line-height:1.4}
.choice:disabled{cursor:default;opacity:.55}
.choice.wrong{border-color:#F04438;color:#B42318;opacity:.7;text-decoration:line-through}
.choice.right{border-color:#1FA463;background:#ECFDF3;color:#067647;opacity:1}
.mini-answer{border-top:0;padding-top:0}
.answer-reveal{background:var(--info-bg);border:1px solid var(--info-line);border-radius:12px;padding:10px 12px;font-size:14px;white-space:pre-wrap}
.fixbox{width:100%;background:var(--code-bg);color:var(--code-fg);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:12px 14px;font:14px/1.55 var(--mono);resize:vertical;outline:none;tab-size:2}
.ok-t{color:#067647!important}.err-t{color:#B42318!important}
.timer{--p:1;display:inline-flex;align-items:center;gap:2px;font:700 13px var(--mono);padding:4px 10px;border-radius:999px;background:conic-gradient(rgba(242,84,27,.18) calc(var(--p)*360deg),transparent 0);border:1px solid rgba(242,84,27,.35);color:#B93815}
.timer.low{animation:pop .5s ease infinite alternate;background:#FEE4E2;color:#B42318}
@media (prefers-reduced-motion:reduce){.timer.low{animation:none}}
/* design canvas */
.dz{display:flex;flex-direction:column;gap:10px}
.palette{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px}
.pal{display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 4px;border-radius:12px;border:1.5px dashed var(--glass-line);background:var(--surface);color:#12224A;font:600 12px var(--body);cursor:pointer;text-align:center}
.pal:hover{border-color:#F2541B;color:#F2541B}
.pal svg{width:28px;height:28px}
@media (max-width:640px){.palette{grid-template-columns:repeat(3,minmax(0,1fr))}}
.canvas-wrap{position:relative;border-radius:16px;border:1px solid var(--glass-line);background:var(--surface) radial-gradient(circle,var(--dot) 1px,transparent 1px) 0 0/20px 20px;overflow:hidden}
#dSvg{display:block;width:100%;height:auto;touch-action:none;user-select:none}
#dSvg .node{cursor:grab;color:#12224A}
#dSvg .node rect{fill:#fff;stroke:#98A2B3;stroke-width:1.5}
#dSvg .node.sel rect{stroke:#F2541B;stroke-width:3;fill:#FFF4ED}
#dSvg .node text{font:600 13px var(--body);fill:#101828}
#dSvg .edge{cursor:pointer}
#dSvg .edge .hit{stroke:transparent;stroke-width:16}
#dSvg .edge:hover line+line{stroke:#F04438}
.canvas-tip{position:absolute;left:12px;bottom:10px;font-size:12px;color:var(--muted);background:var(--glass-2);padding:4px 10px;border-radius:999px;pointer-events:none}
@media (max-width:640px){.fb-fab{transition:transform .25s,opacity .25s}.fb-fab.away{transform:translateY(90px);opacity:0;pointer-events:none}footer.site{padding-bottom:84px}}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--fg);cursor:pointer;line-height:1.45}
.consent input{width:18px;height:18px;margin-top:1px;accent-color:#F2541B;flex:none}
.note.legal{font-size:12.5px;text-align:center;margin:0;line-height:1.5}
.note.legal a,.site a{color:var(--muted);text-decoration:underline;text-underline-offset:3px}
.mydata{border:1px solid var(--glass-line);border-radius:12px;padding:10px 14px;background:var(--surface-2)}
.mydata summary{cursor:pointer;font-weight:600;font-size:14px}
.mydata-body{display:flex;flex-direction:column;gap:10px;margin-top:10px}
.mydata-body .note{margin:0;min-height:1em}
.btn.danger{color:#B42318;border-color:#FDA29B}

/* ---------- sections ---------- */
.start-card{gap:14px}
.sec{display:flex;flex-direction:column;gap:14px;padding:18px;border-radius:20px;background:var(--surface-2);border:1px solid var(--glass-line)}
.sec.sm{gap:10px;padding:14px}
.sec-h{display:flex;gap:12px;align-items:center}
.sec-n{flex:none;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font:700 13px var(--mono);background:var(--inv-bg);color:var(--inv-fg)}
.sec-h b,.sec-t{display:block;font-family:var(--display);font-size:16px;font-weight:700;color:var(--fg);letter-spacing:-.01em}
.sec-h small{display:block;font-size:12.5px;color:var(--muted);margin-top:1px}
.fb-card #fbBody{gap:12px}
@media (max-width:640px){.sec{padding:14px;border-radius:16px}.start-card{padding:14px}}
/* ---------- theme toggle ---------- */
#themeBtn svg{width:18px;height:18px}
#themeBtn .i-sun{display:none}
:root[data-theme="dark"] #themeBtn .i-sun{display:block}:root[data-theme="dark"] #themeBtn .i-moon{display:none}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) #themeBtn .i-sun{display:block}:root:not([data-theme="light"]) #themeBtn .i-moon{display:none}}
:root[data-theme="dark"]{--bg:#0B1220; --bg-2:#0F172A; --glass:rgba(19,28,48,.78); --glass-2:rgba(24,34,58,.92); --glass-line:rgba(255,255,255,.09); --glass-hi:#1A2540;
  --fg:#E8ECF4; --muted:#A3AEC2; --faint:#6E7A90; --accent:#6EA8FF;
  --ok-bg:rgba(31,164,99,.14); --ok-fg:#7EE2A8; --warn-bg:rgba(242,84,27,.14); --warn-fg:#FFB08A; --err-bg:rgba(240,68,56,.14); --err-fg:#FF9C94;
  --surface:#131C30; --surface-2:#0F1728; --inv-bg:#E8ECF4; --inv-fg:#0B1220; --link:#FF9C6B; --hint-bg:rgba(245,184,0,.12); --hint-line:rgba(245,184,0,.3); --info-bg:rgba(110,168,255,.12); --info-line:rgba(110,168,255,.3); --sel-bg:rgba(242,84,27,.14); --sel-line:rgba(242,84,27,.35); --dot:#22304C; --tab-sel:rgba(255,255,255,.1);
  color-scheme:dark;}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0B1220; --bg-2:#0F172A; --glass:rgba(19,28,48,.78); --glass-2:rgba(24,34,58,.92); --glass-line:rgba(255,255,255,.09); --glass-hi:#1A2540;
  --fg:#E8ECF4; --muted:#A3AEC2; --faint:#6E7A90; --accent:#6EA8FF;
  --ok-bg:rgba(31,164,99,.14); --ok-fg:#7EE2A8; --warn-bg:rgba(242,84,27,.14); --warn-fg:#FFB08A; --err-bg:rgba(240,68,56,.14); --err-fg:#FF9C94;
  --surface:#131C30; --surface-2:#0F1728; --inv-bg:#E8ECF4; --inv-fg:#0B1220; --link:#FF9C6B; --hint-bg:rgba(245,184,0,.12); --hint-line:rgba(245,184,0,.3); --info-bg:rgba(110,168,255,.12); --info-line:rgba(110,168,255,.3); --sel-bg:rgba(242,84,27,.14); --sel-line:rgba(242,84,27,.35); --dot:#22304C; --tab-sel:rgba(255,255,255,.1);
  color-scheme:dark;}}
:root[data-theme="dark"] body::before{background:radial-gradient(60vmax 40vmax at 50% -10%,rgba(245,184,0,.08),transparent 60%),radial-gradient(40vmax 30vmax at 100% 100%,rgba(242,84,27,.08),transparent 60%),var(--bg)}
:root[data-theme="dark"] .status.s-ok{background:rgba(31,164,99,.18);color:#7EE2A8}
:root[data-theme="dark"] .status.s-err{background:rgba(240,68,56,.18);color:#FF9C94}
:root[data-theme="dark"] .status.s-net{background:rgba(255,255,255,.08);color:var(--muted)}
:root[data-theme="dark"] pre.json{color:var(--fg)}
:root[data-theme="dark"] .j-k{color:#FFB08A}
:root[data-theme="dark"] .j-s{color:#7EE2A8}
:root[data-theme="dark"] .j-n{color:#9DC2FF}
:root[data-theme="dark"] .j-l{color:#FFD27A}
:root[data-theme="dark"] .choice.right{background:rgba(31,164,99,.16);color:#7EE2A8}
:root[data-theme="dark"] .choice.wrong{color:#FF9C94}
:root[data-theme="dark"] #dSvg .node{color:#C9D4EA}
:root[data-theme="dark"] #dSvg .node rect{fill:#131C30;stroke:#3A4A6B}
:root[data-theme="dark"] #dSvg .node.sel rect{fill:rgba(242,84,27,.16)}
:root[data-theme="dark"] #dSvg .node text{fill:#E8ECF4}
:root[data-theme="dark"] #dSvg line[stroke="#475467"]{stroke:#8FA0BF}
:root[data-theme="dark"] #dArrow path{fill:#8FA0BF}
:root[data-theme="dark"] .pal{color:#C9D4EA}
:root[data-theme="dark"] .code-in,:root[data-theme="dark"] .field input,:root[data-theme="dark"] .input{color:var(--fg)}
:root[data-theme="dark"] .btn.plain{background:var(--surface);color:var(--fg);border-color:var(--glass-line)}
:root[data-theme="dark"] .btn.danger{color:#FF9C94;border-color:rgba(240,68,56,.4)}
:root[data-theme="dark"] .fb{background:rgba(0,0,0,.5)}
:root[data-theme="dark"] .game[aria-pressed="true"] .gicon{background:#F2541B;color:#fff}
:root[data-theme="dark"] .game .gicon{background:rgba(255,255,255,.07)}
:root[data-theme="dark"] .mode .blurb,:root[data-theme="dark"] .mode .pts{color:var(--muted)}
:root[data-theme="dark"] .lb tr.mine td{background:rgba(245,184,0,.1)}
:root[data-theme="dark"] .fb-fab{background:#E8ECF4;color:#0B1220}
:root[data-theme="dark"] .toast{background:#E8ECF4;color:#0B1220}
:root[data-theme="dark"] .timer{color:#FFB08A}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) body::before{background:radial-gradient(60vmax 40vmax at 50% -10%,rgba(245,184,0,.08),transparent 60%),radial-gradient(40vmax 30vmax at 100% 100%,rgba(242,84,27,.08),transparent 60%),var(--bg)}:root:not([data-theme="light"]) .status.s-ok{background:rgba(31,164,99,.18);color:#7EE2A8}:root:not([data-theme="light"]) .status.s-err{background:rgba(240,68,56,.18);color:#FF9C94}:root:not([data-theme="light"]) .status.s-net{background:rgba(255,255,255,.08);color:var(--muted)}:root:not([data-theme="light"]) pre.json{color:var(--fg)}:root:not([data-theme="light"]) .j-k{color:#FFB08A}:root:not([data-theme="light"]) .j-s{color:#7EE2A8}:root:not([data-theme="light"]) .j-n{color:#9DC2FF}:root:not([data-theme="light"]) .j-l{color:#FFD27A}:root:not([data-theme="light"]) .choice.right{background:rgba(31,164,99,.16);color:#7EE2A8}:root:not([data-theme="light"]) .choice.wrong{color:#FF9C94}:root:not([data-theme="light"]) #dSvg .node{color:#C9D4EA}:root:not([data-theme="light"]) #dSvg .node rect{fill:#131C30;stroke:#3A4A6B}:root:not([data-theme="light"]) #dSvg .node.sel rect{fill:rgba(242,84,27,.16)}:root:not([data-theme="light"]) #dSvg .node text{fill:#E8ECF4}:root:not([data-theme="light"]) #dSvg line[stroke="#475467"]{stroke:#8FA0BF}:root:not([data-theme="light"]) #dArrow path{fill:#8FA0BF}:root:not([data-theme="light"]) .pal{color:#C9D4EA}:root:not([data-theme="light"]) .code-in,:root:not([data-theme="light"]) .field input,:root:not([data-theme="light"]) .input{color:var(--fg)}:root:not([data-theme="light"]) .btn.plain{background:var(--surface);color:var(--fg);border-color:var(--glass-line)}:root:not([data-theme="light"]) .btn.danger{color:#FF9C94;border-color:rgba(240,68,56,.4)}:root:not([data-theme="light"]) .fb{background:rgba(0,0,0,.5)}:root:not([data-theme="light"]) .game[aria-pressed="true"] .gicon{background:#F2541B;color:#fff}:root:not([data-theme="light"]) .game .gicon{background:rgba(255,255,255,.07)}:root:not([data-theme="light"]) .mode .blurb,:root:not([data-theme="light"]) .mode .pts{color:var(--muted)}:root:not([data-theme="light"]) .lb tr.mine td{background:rgba(245,184,0,.1)}:root:not([data-theme="light"]) .fb-fab{background:#E8ECF4;color:#0B1220}:root:not([data-theme="light"]) .toast{background:#E8ECF4;color:#0B1220}:root:not([data-theme="light"]) .timer{color:#FFB08A}}
.guest-row{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:14px;padding-top:2px}
.guest-row .btn{width:auto!important}
.nudge-card{text-align:center;align-items:center}
.nudge-card h2{font-family:var(--display);font-size:24px;margin:6px 0 4px}
.nudge-card p{color:var(--muted);line-height:1.55;margin:0 0 6px}
.nudge-art{width:140px;height:auto;margin:4px auto 0;display:block}
.labtop .howto-open{display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.labtop .howto-open svg{width:16px;height:16px;color:#F2541B}
.howto-card{max-width:760px;gap:12px}
.howto-card h2{font-family:var(--display);font-size:26px;margin:2px 0 0}
.ht-media{width:100%;border-radius:16px;overflow:hidden;border:1px solid var(--glass-line);background:var(--surface-2);aspect-ratio:3/2}
.ht-media img{display:block;width:100%;height:100%;object-fit:cover}
.ht-steps{text-align:left;margin:0;padding-left:22px;display:flex;flex-direction:column;gap:6px;width:100%;color:var(--fg);font-size:15px;line-height:1.5}
.ht-steps li::marker{font-weight:700;color:#F2541B}
.howto-card .btn{width:100%}
@media (max-width:640px){.howto-card{padding:20px 14px 16px}.howto-card h2{font-size:22px}.labtop .howto-open{order:3}}
pre.art-pre.json,:root[data-theme="dark"] pre.art-pre.json{color:var(--code-fg);padding:12px 14px}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) pre.art-pre.json{color:var(--code-fg)}}
@media (max-width:640px){.ht-media{aspect-ratio:auto;max-height:50vh;display:flex;justify-content:center;background:var(--bg)}.ht-media img{width:auto;max-width:100%;height:auto;max-height:50vh;object-fit:contain}.howto-card{max-height:calc(100vh - 24px);overflow:auto}.howto-card .kicker{display:none}}
/* ---------- level / game complete ---------- */
.done-card{overflow:hidden;gap:10px}
.done-card h2{font-family:var(--display);font-size:26px;margin:0;line-height:1.2}
.done-card p{color:var(--muted);margin:0;line-height:1.5}
.medal svg{width:84px;height:84px;display:block;margin:4px auto 0;animation:medal .7s cubic-bezier(.2,1.4,.4,1)}
@keyframes medal{from{transform:scale(.3) rotate(-25deg);opacity:0}to{transform:none;opacity:1}}
.done-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;width:100%;margin:6px 0}
.done-stats div{background:var(--surface-2);border:1px solid var(--glass-line);border-radius:14px;padding:10px 6px}
.done-stats b{display:block;font-family:var(--display);font-size:24px}
.done-stats small{display:block;font-size:12px;color:var(--muted)}
.done-actions{display:flex;flex-direction:column;gap:8px;width:100%}
.done-actions .btn.lg{width:100%}
.row.center{justify-content:center}
#doneShare{display:inline-flex;gap:6px;align-items:center}#doneShare svg{width:16px;height:16px}
.confetti{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.confetti i{position:absolute;top:-12px;left:var(--x);width:8px;height:14px;border-radius:2px;background:var(--c);transform:rotate(var(--r));animation:fall 2.4s ease-in var(--d) forwards;opacity:.9}
@keyframes fall{to{transform:translateY(560px) rotate(calc(var(--r) + 540deg));opacity:0}}
@media (prefers-reduced-motion:reduce){.confetti{display:none}.medal svg{animation:none}}
.lb .badges{color:#E0A800;font-size:13px;letter-spacing:1px}
@media (max-width:640px){.done-card h2{font-size:22px}.done-stats b{font-size:20px}}