/* Gridlock Architect: main menu + cookie banner */
#menu{--dim:#a9b3bf;--acc2:#7db4ee;--amb:#ffc857;position:fixed;inset:0;z-index:11;display:none;overflow-x:hidden;overflow-y:auto;background:#0b0e12;color:var(--txt);font-family:"Segoe UI",system-ui,sans-serif;padding:max(20px,env(safe-area-inset-top)) max(20px,env(safe-area-inset-right)) calc(max(20px,env(safe-area-inset-bottom)) + var(--ckh,0px)) max(20px,env(safe-area-inset-left))}
#menu.open{display:flex}
#menu .bg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;opacity:0;animation:mfade 1.4s .05s ease-out forwards}
#menu .scrim{position:fixed;inset:0;pointer-events:none;background:radial-gradient(ellipse 120% 100% at 50% 50%,transparent 45%,rgba(5,7,10,.7) 100%),linear-gradient(90deg,rgba(9,12,16,.9) 0,rgba(9,12,16,.62) 34%,rgba(9,12,16,0) 68%)}
#menu .wrap{position:relative;margin:auto 0;width:min(440px,100%);padding:clamp(0px,4vh,40px) 0 clamp(0px,3vh,24px) clamp(0px,7vw,120px);box-sizing:content-box}
#menu .in{opacity:0;transform:translateY(12px);animation:mrise .55s cubic-bezier(.2,.7,.2,1) forwards;animation-delay:var(--d,0ms)}
@keyframes mfade{to{opacity:1}}
@keyframes mrise{to{opacity:1;transform:none}}

/* wordmark */
#menu .brand{display:grid;grid-template-columns:auto 1fr;column-gap:18px;align-items:center;justify-items:start;margin-bottom:26px}
#menu .mark{grid-row:1;width:68px;height:68px;display:block;margin:0;filter:drop-shadow(0 4px 18px rgba(79,143,208,.35))}
#menu h1{grid-column:2;margin:0;font-weight:900;font-size:clamp(46px,9vw,68px);line-height:.9;letter-spacing:-.02em;text-transform:none}
#menu h1 span{display:block}
#menu h1 .a{color:var(--acc2)}
#menu .lane{grid-column:1/-1;height:4px;width:min(260px,70%);margin:16px 0 12px;background:repeating-linear-gradient(90deg,var(--amb) 0 16px,transparent 16px 30px);border-radius:2px;animation:mrise .55s cubic-bezier(.2,.7,.2,1) var(--d,0ms) both,mlane 1s linear infinite}
@keyframes mlane{to{background-position:30px 0}}
#menu .tag{grid-column:1/-1;margin:0;color:#c3ccd6;font-size:13px;font-weight:600;letter-spacing:.16em;text-transform:uppercase}

/* actions */
#menu .acts{display:flex;flex-direction:column;gap:6px}
#menu .acts button{position:relative;display:flex;align-items:center;gap:14px;width:100%;text-align:left;padding:0 16px;min-height:50px;font-size:16px;font-weight:600;border-radius:8px;border:1px solid transparent;background:rgba(30,38,48,.9);border-color:#36404b;color:var(--txt);overflow:hidden;transition:transform .16s ease,background .16s,border-color .16s}
#menu .acts button::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--acc2);transform:scaleY(0);transition:transform .16s ease}
#menu .acts button svg.ic{flex:none;width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;opacity:.85}
#menu .acts button .lb{flex:1;min-width:0}
#menu .acts button .hint{flex:none;font-size:12px;font-weight:700;color:#c3ccd6;border:1px solid #4a5563;border-radius:4px;padding:1px 6px;min-width:22px;text-align:center;letter-spacing:.04em}
#menu .acts button:hover,#menu .acts button:focus-visible{background:rgba(44,54,66,.96);border-color:#4a5563;transform:translateX(6px)}
#menu .acts button:hover::before,#menu .acts button:focus-visible::before{transform:none}
#menu .acts button:focus-visible{outline:2px solid var(--acc2);outline-offset:2px}
#menu .acts button:active{transform:translateX(3px)}
#menu .acts button:disabled{opacity:.45;cursor:default;transform:none}
#menu .acts button:disabled::before{display:none}
#menu .acts button.pri{flex-wrap:wrap;min-height:68px;padding-top:10px;padding-bottom:10px;font-size:19px;font-weight:700;background:linear-gradient(100deg,#3f7fc4,#2f66a8);border-color:#6aa3df;color:#fff;box-shadow:0 8px 28px rgba(47,102,168,.38)}
#menu .acts button.pri:hover,#menu .acts button.pri:focus-visible{background:linear-gradient(100deg,#4f8fd0,#3a74b9);border-color:#a5cbf2}
#menu .acts button.pri::before{background:var(--amb)}
#menu .acts button.pri .hint{color:#dbe9f8;border-color:rgba(255,255,255,.35)}
#menu .acts button.pri svg.ic{opacity:1;width:24px;height:24px}
#menu .acts button.pri .lb{display:flex;flex-direction:column;gap:2px}
#menu .acts button.pri .meta{font-size:12px;font-weight:500;color:#dbe9f8;letter-spacing:.01em}
#menu .acts button.pri:disabled{background:rgba(30,38,48,.9);border-color:var(--line);box-shadow:none;color:var(--dim)}
#menu .acts button.pri:disabled .meta{color:var(--dim)}

/* map size segmented control */
#menu .size{margin:2px 0 4px;padding:10px 10px 10px 16px;border-left:1px dashed #4a5563;margin-left:10px;background:rgba(18,23,29,.78);border-radius:0 8px 8px 0}
#menu .size .cap{display:block;margin-bottom:8px;color:#c3ccd6;font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase}
#menu .seg{display:grid;grid-template-columns:repeat(4,1fr);gap:4px}
#menu .seg button{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 2px 7px;font-size:13px;font-weight:600;color:#b8c2ce;background:var(--panel2);border:1px solid var(--line);border-radius:7px;transition:background .14s,color .14s,border-color .14s}
#menu .seg button svg{width:22px;height:22px;display:block}
#menu .seg button svg rect{fill:none;stroke:currentColor;stroke-width:1.5}
#menu .seg button svg path{stroke:currentColor;stroke-width:1.2;opacity:.7}
#menu .seg button:hover{color:var(--txt);background:#323a43}
#menu .seg button[aria-checked="true"]{color:#fff;background:var(--accbg);border-color:var(--acc)}
#menu .seg button:focus-visible{outline:2px solid var(--acc2);outline-offset:2px}

/* footer */
#menu .foot{margin-top:22px;display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center;color:#b8c2ce;font-size:13px}
#menu .foot .ver{font-weight:700;color:#a9b3bf;letter-spacing:.04em}
#menu .foot kbd{font:inherit;font-size:12px;border:1px solid var(--line);border-radius:4px;padding:0 5px;background:var(--panel2);color:var(--txt)}
#menu .foot button{background:none;border:0;padding:2px 0;color:var(--acc2);text-decoration:underline;text-underline-offset:3px;font-size:13px;border-radius:3px}
#menu .foot button:hover{background:none;color:#fff}

/* cookie banner */
#cookies{position:fixed;left:max(16px,env(safe-area-inset-left));bottom:max(16px,env(safe-area-inset-bottom));transform:none;width:min(360px,calc(100vw - 32px));z-index:30;padding:14px 16px 14px;display:none;border-radius:10px;border-color:#3a4450;background:rgba(17,21,26,.96)}
#cookies.open{display:block;animation:mrise .35s ease-out both}
#cookies b{display:block;font-size:14px;font-weight:700}
#cookies p{margin:5px 0 8px;color:#a9b3bf;font-size:12.5px;line-height:1.45}
#cookies details{margin:0 0 12px;font-size:13px;color:#b8c2ce}
#cookies summary{cursor:pointer;width:max-content;color:var(--acc2);border-radius:3px;list-style-position:inside}
#cookies summary:focus-visible{outline:2px solid var(--acc2);outline-offset:2px}
#cookies details ul{margin:7px 0 0;padding-left:18px;line-height:1.5}
#cookies code{font:11px Consolas,monospace;color:var(--txt)}
#cookies .cb{display:flex;gap:8px;flex-wrap:wrap}
#cookies .cb button{flex:1 1 0;padding:8px 10px;font-weight:600;white-space:nowrap}
#cookies .cb button.pri{background:var(--acc);border-color:var(--acc);color:#fff}
#cookies .cb button.pri:hover{background:#6aa3df}

@media (max-width:640px){
  #menu .wrap{margin:auto;padding:8px 0 0;width:min(420px,100%)}
  #menu .scrim{background:radial-gradient(ellipse 120% 100% at 50% 50%,rgba(9,12,16,.55) 20%,rgba(5,7,10,.85) 100%)}
  #menu .brand{display:flex;flex-direction:column;align-items:center;text-align:center;margin-bottom:20px}
  #menu .mark{width:48px;height:48px;margin-bottom:12px}
  #menu h1{font-size:clamp(42px,14vw,60px)}
  #menu .lane{margin:12px auto 10px}
  #menu .tag{font-size:11px;letter-spacing:.12em}
  #menu .foot{justify-content:center;text-align:center;margin-top:16px}
  #cookies{left:0;right:0;bottom:0;width:auto;border-radius:12px 12px 0 0;padding-bottom:max(14px,env(safe-area-inset-bottom))}
}
@media (max-height:900px) and (min-width:641px){#menu .wrap{padding-top:0;padding-bottom:0}#menu .brand{margin-bottom:20px}}
@media (max-width:640px) and (max-height:720px){
  #menu{padding-top:12px}
  #menu .mark{width:34px;height:34px;margin-bottom:8px}
  #menu h1{font-size:40px}
  #menu .brand{margin-bottom:12px}
  #menu .lane{margin:8px auto 6px}
  #menu .acts{gap:4px}
  #menu .acts button{min-height:44px}
  #menu .acts button.pri{min-height:58px;padding-top:6px;padding-bottom:6px;font-size:18px}
  #menu .size{padding:6px 8px 8px 12px}
  #menu .size .cap{margin-bottom:5px}
  #menu .seg button{padding:5px 2px}
  #menu .seg button svg{display:none}
  #menu .foot{margin-top:10px}
  #cookies{padding-top:10px}
  #cookies p{display:none}
  #cookies details{margin-bottom:8px}
}
@media (prefers-reduced-motion:reduce){
  #menu .bg,#menu .in,#cookies.open{animation:none;opacity:1;transform:none}
  #menu .lane{animation:none}
  #menu .acts button,#menu .acts button::before{transition:none}
}

/* difficulty selector */
#menu .size .dcap{margin-top:12px}
#menu .seg.d3{grid-template-columns:repeat(3,1fr)}
#menu .seg.d3 button{padding:9px 4px 8px;gap:2px}
#menu .seg.d3 button small{font-size:11px;font-weight:500;opacity:.8}
@media (max-height:719px){#menu .size .dcap{margin-top:7px}#menu .seg.d3 button{padding:5px 2px}#menu .seg.d3 button small{display:none}}