[hidden]{display:none!important}
:root{
  --bg:#EEF0F2; --surface:#FFFFFF; --sunk:#E4E7EB; --ink:#15191E; --muted:#5A6470; --line:#D3D8DF;
  --accent:#2F54EB; --accent-ink:#FFFFFF; --accent-soft:#E3E9FF;
  --c-rapier:#D9772B; --c-cannon:#2E9A8A; --c-octree:#7A5FD0; --c-custom:#7C8591;
  --good:#2F8F4E; --warn:#B7791F;
  --display:"Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --body:"IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono:"JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --bg:#0F1216; --surface:#171B21; --sunk:#1E232A; --ink:#E6E9ED; --muted:#98A2AE; --line:#2A313A;
    --accent:#7B93FF; --accent-ink:#0B0E14; --accent-soft:#1D2440;
    --good:#5CC27E; --warn:#E0A84A;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0F1216; --surface:#171B21; --sunk:#1E232A; --ink:#E6E9ED; --muted:#98A2AE; --line:#2A313A;
  --accent:#7B93FF; --accent-ink:#0B0E14; --accent-soft:#1D2440;
  --good:#5CC27E; --warn:#E0A84A;
}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--body);font-size:15px;line-height:1.55;padding-inline:clamp(16px,4vw,40px);padding-block:28px 64px}
.wrap{max-width:1180px;margin:0 auto;display:flex;flex-direction:column;gap:48px}
h1,h2,h3{font-family:var(--display);text-wrap:balance;margin:0;letter-spacing:-0.01em}
h1{font-size:clamp(30px,5vw,46px);font-weight:750;line-height:1.05}
h2{font-size:26px;font-weight:750}
h3{font-size:18px;font-weight:600}
p{margin:0}
a{color:var(--accent);text-underline-offset:3px}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.lede{max-width:68ch;color:var(--muted);font-size:16px}
header{display:flex;flex-direction:column;gap:12px}
.sec-head{display:flex;flex-direction:column;gap:6px;margin-bottom:18px}
.sec-head p{max-width:70ch;color:var(--muted)}

/* Playground */
.lab{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:16px;align-items:start}
@media (max-width:900px){.lab{grid-template-columns:1fr}}
.viewport{position:relative;border-radius:10px;overflow:hidden;background:#1B2027;aspect-ratio:16/10;max-width:100%;border:1px solid var(--line)}
.viewport canvas{display:block;width:100%;height:100%;touch-action:none}
.hud{position:absolute;left:10px;top:10px;display:flex;flex-direction:column;gap:6px;pointer-events:none}
.hud-row{display:flex;gap:6px;flex-wrap:wrap}
.pill{font-family:var(--mono);font-size:12px;background:rgba(12,15,20,.72);color:#E6E9ED;padding:4px 8px;border-radius:6px;font-variant-numeric:tabular-nums;white-space:nowrap}
.pill b{font-weight:500;color:#fff}
.spark{background:rgba(12,15,20,.72);border-radius:6px;padding:4px}
.spark canvas{display:block;width:180px;height:44px}
.status{position:absolute;inset:auto 10px 10px 10px;font-family:var(--mono);font-size:12px;color:#E6E9ED;background:rgba(12,15,20,.8);padding:6px 10px;border-radius:6px}
.hint{position:absolute;right:10px;top:10px;font-family:var(--mono);font-size:11px;color:#AEB6C1;background:rgba(12,15,20,.6);padding:4px 8px;border-radius:6px;pointer-events:none}
@media (max-width:560px){.hint{display:none}.spark canvas{width:130px}}

.panel{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:16px;display:flex;flex-direction:column;gap:16px}
.group{display:flex;flex-direction:column;gap:8px}
.group>.eyebrow{margin-bottom:2px}
.engines{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.eng{font:inherit;font-size:13px;text-align:left;cursor:pointer;border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:8px;padding:8px 10px;display:flex;flex-direction:column;gap:2px}
.eng .n{font-weight:600;display:flex;align-items:center;gap:6px}
.eng .n i{width:9px;height:9px;border-radius:50%;display:inline-block;background:var(--dot)}
.eng .k{font-family:var(--mono);font-size:11px;color:var(--muted)}
.eng[aria-pressed="true"]{border-color:var(--accent);background:var(--accent-soft)}
.btns{display:flex;flex-wrap:wrap;gap:6px}
.btn{font:inherit;font-size:13px;font-weight:500;cursor:pointer;border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:7px;padding:7px 11px}
.btn:hover:not(:disabled){border-color:var(--accent)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn kbd{font-family:var(--mono);font-size:11px;opacity:.75;margin-left:4px}
.check{display:flex;align-items:center;gap:8px;font-size:13px}
.info{font-size:13.5px;color:var(--ink);display:flex;flex-direction:column;gap:8px;border-top:1px solid var(--line);padding-top:14px}
.info dl{display:grid;grid-template-columns:auto 1fr;gap:4px 10px;margin:0}
.info dt{font-family:var(--mono);font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;padding-top:2px}
.info dd{margin:0}
.info p{color:var(--muted)}

/* Table */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px;background:var(--surface)}
table{border-collapse:collapse;width:100%;min-width:860px;font-size:13.5px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-weight:500;background:var(--sunk)}
tr:last-child td{border-bottom:0}
td:first-child{font-weight:600;white-space:nowrap}
.tag{display:inline-block;font-family:var(--mono);font-size:11px;padding:2px 7px;border-radius:5px;border:1px solid var(--line);white-space:nowrap}
.tag.ok{color:var(--good);border-color:currentColor}
.tag.old{color:var(--warn);border-color:currentColor}

/* Directory */
.dir{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:14px}
@media (max-width:400px){.dir{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:16px;display:flex;flex-direction:column;gap:10px}
.card-top{display:flex;justify-content:space-between;align-items:baseline;gap:10px;flex-wrap:wrap}
.card p{color:var(--muted);font-size:13.5px}
.card ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:5px}
.card li a{font-family:var(--mono);font-size:12.5px;word-break:break-word}
.card li span{color:var(--muted);font-size:12.5px}
.guide{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px}
.guide div{border-top:2px solid var(--ink);padding-top:10px;display:flex;flex-direction:column;gap:6px}
.guide p{color:var(--muted);font-size:14px}
footer{color:var(--muted);font-size:13px}
@media (prefers-reduced-motion: reduce){*{scroll-behavior:auto}}

/* Navigace a rozcestník webu */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px 24px;flex-wrap:wrap;padding-bottom:14px;border-bottom:1px solid var(--line)}
.brand{font-family:var(--display);font-weight:750;font-size:18px;color:var(--ink);text-decoration:none;letter-spacing:-0.01em}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{font-size:14px;font-weight:500;color:var(--muted);text-decoration:none;padding:6px 10px;border-radius:7px}
.nav a:hover{color:var(--ink);background:var(--sunk)}
.nav a[aria-current="page"]{color:var(--accent);background:var(--accent-soft)}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}
.tile{display:flex;flex-direction:column;gap:8px;padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:10px;color:var(--ink);text-decoration:none}
.tile:hover{border-color:var(--accent)}
.tile p{color:var(--muted);font-size:14px}
.tile .go{margin-top:auto;font-family:var(--mono);font-size:12px;color:var(--accent)}

/* Výběr tvarů */
.shapes{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.shape{font:inherit;font-size:12.5px;text-align:left;cursor:pointer;border:1px solid var(--line);background:var(--bg);color:var(--muted);border-radius:8px;padding:7px 9px;display:flex;flex-direction:column;gap:1px;opacity:.6}
.shape .n{font-weight:600;display:flex;align-items:center;gap:6px;color:var(--ink)}
.shape .n i{width:9px;height:9px;transform:rotate(45deg);display:inline-block;background:var(--dot);flex:none}
.shape .k{font-family:var(--mono);font-size:10.5px;font-variant-numeric:tabular-nums}
.shape[aria-pressed="true"]{opacity:1;border-color:var(--dot)}
.row-head{display:flex;justify-content:space-between;align-items:baseline}
.link-btn{font:inherit;font-size:12px;background:none;border:0;color:var(--accent);cursor:pointer;padding:0}
.lab{grid-template-columns:minmax(0,1fr) 340px}
@media (max-width:900px){.lab{grid-template-columns:1fr}}
.legend{font-family:var(--mono);font-size:10.5px;color:var(--muted)}

/* Řádky tvarů s tlačítky + a úpravou barvy */
.shapes{display:flex;flex-direction:column;gap:5px}
.shape-row{display:flex;gap:5px;align-items:stretch}
.shape-row .shape{flex:1;min-width:0;flex-direction:row;justify-content:space-between;align-items:center;gap:8px}
.icon-btn{flex:none;width:34px;display:grid;place-items:center;cursor:pointer;border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:8px;padding:0}
.icon-btn svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.icon-btn:hover{border-color:var(--dot)}
.icon-btn[aria-expanded="true"]{background:var(--dot);border-color:var(--dot);color:#0D1015}
.color-editor{--cur:#888;border:1px solid var(--line);border-left:4px solid var(--cur);border-radius:8px;background:var(--sunk);padding:10px;display:flex;flex-direction:column;gap:8px}
.ce-top{display:flex;gap:10px;align-items:center}
.ce-top input[type=color]{width:44px;height:34px;border:1px solid var(--line);border-radius:6px;padding:2px;background:var(--surface);cursor:pointer}
.ce-hex{display:flex;align-items:center;gap:6px;font-family:var(--mono);font-size:11px;color:var(--muted)}
.ce-hex input{width:92px;font-family:var(--mono);font-size:13px;padding:6px 8px;border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--ink);text-transform:uppercase}
.ce-ch{display:grid;grid-template-columns:14px 1fr 54px;gap:8px;align-items:center}
.ce-ch label{font-family:var(--mono);font-size:12px;font-weight:500}
.ce-r{--ch:#E5484D}.ce-g{--ch:#30A46C}.ce-b{--ch:#3E63DD}
.ce-ch label{color:var(--ch)}
.ce-ch input[type=range]{width:100%;accent-color:var(--ch)}
.ce-ch input[type=number]{width:54px;font-family:var(--mono);font-size:12px;padding:4px 6px;border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--ink);font-variant-numeric:tabular-nums}
.ce-actions{display:flex;justify-content:space-between;gap:6px;flex-wrap:wrap}
.legend{line-height:1.45}
.shape-row .shape .k{white-space:nowrap}.shape-row .shape .n{min-width:0}

/* Kolo barev a paleta */
.ce-top .ce-wheel-btn{height:34px;margin-left:auto;--dot:var(--cur)}
.ce-wheel{display:flex;flex-direction:column;gap:8px;padding-top:4px;border-top:1px solid var(--line)}
.ce-wheel-box{position:relative;width:180px;max-width:100%;aspect-ratio:1;margin:4px auto 0}
.ce-wheel-box canvas{width:100%;height:100%;display:block;border-radius:50%;cursor:crosshair;touch-action:none}
.ce-marker{position:absolute;width:16px;height:16px;border-radius:50%;border:2px solid #fff;box-shadow:0 0 0 1px rgba(0,0,0,.6),0 1px 4px rgba(0,0,0,.4);background:var(--cur);transform:translate(-50%,-50%);pointer-events:none}
.ce-v{--ch:var(--ink)}
.ce-v output{font-family:var(--mono);font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.ce-swatches{display:grid;grid-template-columns:repeat(8,1fr);gap:5px}
.ce-swatch{aspect-ratio:1;border-radius:5px;border:1px solid rgba(0,0,0,.25);cursor:pointer;padding:0;min-width:0}
.ce-swatch:hover{transform:scale(1.12)}
.ce-swatch.on{outline:2px solid var(--ink);outline-offset:1px}
.shape-row .shape .n{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;display:block}.shape-row .shape .n i{margin-right:6px;vertical-align:1px}

/* Hra Šedesátčtyřka */
.game{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:16px;align-items:start}
@media (max-width:980px){.game{grid-template-columns:1fr}}
.game-vp{aspect-ratio:16/10;background:#0B0E13}
.game-vp canvas{cursor:grab}
.game-vp canvas:active{cursor:grabbing}
.pill.next i{display:inline-block;width:9px;height:9px;transform:rotate(45deg);background:var(--dot);margin:0 6px 0 2px}
.pill.meter{position:relative;overflow:hidden}
.pill.meter::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:calc(var(--fill,0)*100%);background:linear-gradient(90deg,#1DD1A1,#FECA57 70%,#FF6B6B)}
.perf{position:absolute;right:10px;bottom:10px;display:flex;gap:6px;pointer-events:none}
.toast{position:absolute;left:50%;top:14px;transform:translateX(-50%);font-family:var(--mono);font-size:13px;color:#fff;background:rgba(12,15,20,.85);border:1px solid var(--dot,#fff);padding:6px 12px;border-radius:8px;pointer-events:none;white-space:nowrap;max-width:calc(100% - 20px);overflow:hidden;text-overflow:ellipsis}
.toast.pop{animation:pop .25s ease-out}
@keyframes pop{from{transform:translate(-50%,-6px);opacity:0}to{transform:translate(-50%,0);opacity:1}}
@media (prefers-reduced-motion: reduce){.toast.pop{animation:none}}
.over{position:absolute;inset:0;display:grid;place-items:center;background:rgba(8,10,14,.6)}
.over-card{background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:12px;padding:20px 24px;display:flex;flex-direction:column;gap:10px;min-width:240px;max-width:calc(100% - 32px)}
.over-card p{color:var(--muted)}
.over-card dl{display:grid;grid-template-columns:1fr auto;gap:4px 16px;margin:0;font-variant-numeric:tabular-nums}
.over-card dd{margin:0;font-weight:600;text-align:right}
.recipes{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}
.recipes li{display:flex;align-items:center;gap:6px;padding:4px 6px;border-radius:7px;font-size:13px;transition:opacity .15s}
.recipes li.on{background:var(--accent-soft)}
.recipes li.dim{opacity:.35}
.recipes .chip{display:inline-flex;align-items:center;gap:5px;font-family:var(--mono);font-weight:500;min-width:40px}
.recipes .chip i{width:8px;height:8px;transform:rotate(45deg);background:var(--dot);display:inline-block}
.recipes .op{color:var(--muted);font-family:var(--mono)}
.recipes .nm{color:var(--muted);font-size:12px;margin-left:auto;text-align:right}
.howto{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:6px;font-size:13.5px}
@media (max-width:560px){.game-vp .hint{display:none}.recipes .nm{display:none}}

/* LHC logo */
.lhc-head{display:flex;align-items:center;gap:14px}
.lhc-title{display:flex;flex-direction:column;gap:4px}
.lhc-logo{flex:none;display:inline-grid;place-items:center;background:#0B0E13;border-radius:14px;padding:6px;box-shadow:0 0 0 1px rgba(162,155,254,.25),0 6px 24px -8px rgba(162,155,254,.55)}
.lhc-logo svg{display:block}
.lhc-abbr{font-family:var(--mono);font-weight:500;font-size:.62em;letter-spacing:.12em;padding:3px 8px;border-radius:6px;vertical-align:.18em;margin-right:6px;color:#0B0E13;background:linear-gradient(90deg,#48DBFB,#A29BFE,#F368E0)}
.tile-lhc .lhc-logo{align-self:flex-start;margin-bottom:4px}