/* surri.css — shared layout for the Surriworks circuit pages (hub and subdomains) */
:root{
  --bg:#0a0c11; --ink:#eceae4; --muted:#a2a5b0; --dim:#868a99; --line:#232838;
  --eng:#e8b25c; --sci:#5fd6c4; --game:#5fd17e; --study:#8fb4ff;
  --serif:"Fraunces",Georgia,serif; --sans:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --ease-out:cubic-bezier(.23,1,.32,1); --pad:clamp(16px,2.6vw,40px);
  --sw:clamp(280px,32vw,500px); --gap:58px;
  color-scheme:dark;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--ink);font:400 16px/1.5 var(--sans);-webkit-font-smoothing:antialiased;overflow:hidden}
body{-webkit-user-select:none;user-select:none}
canvas,svg{-webkit-user-drag:none}
a{color:inherit}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:8px}
#bg{position:fixed;inset:0;width:100%;height:100%;display:block}

/* sectors */
.hub{position:fixed;inset:0;display:grid;grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr}
.hub[data-n="2"]{grid-template-rows:1fr}
.hub[data-n="1"]{grid-template-columns:1fr;grid-template-rows:1fr}
.hub[data-n="1"] .q{align-items:flex-end;justify-content:center;text-align:center}
.hub[data-n="1"] .qt{max-width:min(620px,100%)}
.hub[data-n="1"] ~ .sign{top:40%}
@media (max-width:900px){.hub[data-n="1"] ~ .sign{top:42%}}
.q{--c:var(--eng);position:relative;display:flex;padding:var(--pad);text-decoration:none;-webkit-tap-highlight-color:transparent}
.q.tl{align-items:flex-start;justify-content:flex-start}
.q.tr{align-items:flex-start;justify-content:flex-end;text-align:right}
.q.br{align-items:flex-end;justify-content:flex-end;text-align:right}
.q.bl{align-items:flex-end;justify-content:flex-start}
.q.l{align-items:center;justify-content:flex-start}
.q.r{align-items:center;justify-content:flex-end;text-align:right}
.qt{position:relative;max-width:calc(50vw - var(--sw)/2 - var(--gap) - var(--pad) - 28px)}
.q h2{margin:0;font:600 clamp(32px,4.2vw,64px)/1 var(--serif);letter-spacing:-.02em;color:var(--c);transition:transform 200ms var(--ease-out)}
.q .meta{margin:10px 0 0;font-size:14px;color:var(--muted)}
.q .desc{margin:10px 0 0;font-size:15px;line-height:1.45;color:var(--ink);opacity:.88}
.q .by{margin:8px 0 0;font-size:13px;color:var(--dim)}
.q .by cite{font-style:italic;color:var(--muted)}
.q ul{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:3px;font-size:14px}
.q li span{color:var(--dim)}
.q .insight{margin:12px 0 0;font-size:14px;line-height:1.45;color:var(--ink);min-height:4.4em;opacity:0;transform:translateY(4px);transition:opacity 220ms ease,transform 220ms var(--ease-out)}
.q .insight b{color:var(--c);font-weight:600}
.q.on .insight{opacity:1;transform:none}
.q .open{display:inline-flex;align-items:center;gap:8px;margin-top:10px;font-size:14px;color:var(--c)}
.q .open svg{width:16px;height:16px;transition:transform 200ms var(--ease-out)}
.q.on .open svg{transform:translateX(4px)}
.q.soon{cursor:default}.q.soon h2{opacity:.72}
.q:active h2{transform:scale(.98)}

/* the sign in the middle */
.sign{position:fixed;left:50%;top:50%;transform:translate(-50%,-50%);width:var(--sw);z-index:2;text-align:center;
  background:#0d1017;border:1.5px solid #2b3142;border-radius:20px;padding:clamp(18px,2.6vh,28px) clamp(18px,2vw,30px);transition:border-color 300ms ease}
.sign::before,.sign::after,.sign i.screws::before,.sign i.screws::after{content:"";position:absolute;width:7px;height:7px;border-radius:50%;background:#2e3446;box-shadow:inset 0 0 0 2px #3c4458}
.sign::before{left:10px;top:10px}.sign::after{right:10px;top:10px}.sign i.screws::before{left:10px;bottom:10px}.sign i.screws::after{right:10px;bottom:10px}
.sign h1{margin:0;display:inline-flex;align-items:center;gap:12px;font:600 clamp(30px,3.4vw,48px)/1 var(--serif);letter-spacing:-.02em}
.sign h1 svg{width:.62em;height:.62em}
.sign p{margin:12px auto 0;max-width:34ch;color:var(--muted);font-size:15px;line-height:1.45}
.sign .now{margin-top:10px;font-size:14px;color:var(--dim);min-height:2.9em}
.sign .now b{font-weight:600}
.sign .back{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);text-decoration:none;margin-bottom:10px}
.sign .back svg{width:14px;height:14px}
@media (hover:hover) and (pointer:fine){.sign .back:hover{color:var(--ink)}}
.acts{display:flex;justify-content:center;gap:10px;margin-top:14px}
.btn{appearance:none;font:500 14px/1 var(--sans);color:var(--ink);background:#141823;border:1px solid var(--line);border-radius:999px;padding:10px 16px;cursor:pointer;text-decoration:none;
  display:inline-flex;align-items:center;gap:8px;transition:border-color 160ms ease,background-color 160ms ease,transform 160ms var(--ease-out)}
.btn svg{width:16px;height:16px}
.btn:active{transform:scale(.97)}
@media (hover:hover) and (pointer:fine){.btn:hover{border-color:#3a4152;background:#1a1f2c}}

/* about: dark dialog */
.veil{position:fixed;inset:0;z-index:20;background:rgba(4,5,8,.66);opacity:0;visibility:hidden;transition:opacity 200ms ease,visibility 0s linear 200ms}
.veil.open{opacity:1;visibility:visible;transition:opacity 260ms ease,visibility 0s}
.about{position:fixed;z-index:21;left:50%;top:50%;width:min(760px,calc(100% - 2*var(--pad)));max-height:calc(100svh - 40px);overflow:auto;
  background:#11141c;border:1px solid var(--line);border-radius:20px;padding:clamp(22px,3vw,34px);
  transform:translate(-50%,-48%) scale(.97);opacity:0;visibility:hidden;transition:transform 200ms var(--ease-out),opacity 200ms ease,visibility 0s linear 200ms}
.about.open{transform:translate(-50%,-50%);opacity:1;visibility:visible;transition:transform 300ms var(--ease-out),opacity 220ms ease,visibility 0s}
.about:focus{outline:none}
.about-head{display:flex;justify-content:space-between;align-items:center;gap:12px}
.about h3{margin:0;font:600 28px/1.1 var(--serif)}
.x{appearance:none;width:38px;height:38px;border-radius:50%;border:1px solid var(--line);background:none;color:var(--muted);cursor:pointer;display:grid;place-items:center;transition:color 150ms ease,border-color 150ms ease}
.x svg{width:14px;height:14px}
@media (hover:hover) and (pointer:fine){.x:hover{color:var(--ink);border-color:#3a4152}}
.about p.me{margin:10px 0 0;color:var(--muted);font-size:16px;max-width:52ch}
.about-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:24px 32px;margin-top:22px}
.edu{list-style:none;margin:0;padding:0;display:grid;gap:18px}
.edu li{display:grid;grid-template-columns:auto 1fr;gap:2px 14px}
.edu i{grid-row:1/4;font-style:normal;font-size:12px;font-weight:600;color:#d7c3a0;background:rgba(215,195,160,.12);border-radius:999px;padding:3px 9px;align-self:start;margin-top:2px}
.edu li.done i{color:var(--muted);background:rgba(154,156,166,.12)}
.edu b{font:600 18px/1.3 var(--serif)}
.edu span{color:var(--muted);font-size:14px}
.edu em{font-style:normal;color:var(--dim);font-size:13px}
.links{display:grid;gap:8px;align-content:start}
.links a{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:13px 16px;border:1px solid var(--line);border-radius:12px;text-decoration:none;background:#141823;transition:border-color 160ms ease,transform 160ms var(--ease-out)}
.links a span{display:block;color:var(--muted);font-size:13px}
.links a b{font-weight:600;font-size:15px}
.links a:active{transform:scale(.98)}
@media (hover:hover) and (pointer:fine){.links a:hover{border-color:#3a4152}}

@media (prefers-reduced-motion:reduce){.q .insight,.about,.veil,.sign{transition:none}}
@media (max-height:760px) and (min-width:901px){.q .desc{display:none}.q .insight{min-height:0}}

/* phone: titles above and below the circuit */
@media (max-width:900px){
  :root{--sw:min(78vw,340px);--gap:24px}
  .hub[data-n="2"]{grid-template-columns:1fr;grid-template-rows:1fr 1fr}
  .q.l{align-items:flex-start;justify-content:flex-start}
  .q.r{align-items:flex-end;justify-content:flex-end}
  .qt{max-width:none;width:100%}
  .q{padding:18px 16px}
  .q h2{font-size:clamp(26px,7.4vw,34px)}
  .q .desc,.q .insight,.q .by,.q .open{display:none}
  .q .meta{margin-top:4px;font-size:13px}
  .q .meta .u{display:none}
  .q ul{margin-top:8px;font-size:13px;gap:2px}
  .sign{padding:16px 16px 18px}
  .sign p{font-size:14px}
  .acts .gh{display:none}
  .about-grid{grid-template-columns:1fr}
}

/* ===== v2: clear call-to-action on hub sectors ===== */
.q .cta{display:inline-flex;align-items:center;gap:8px;margin-top:14px;padding:9px 14px;border-radius:999px;border:1px solid color-mix(in srgb,var(--c) 55%,transparent);
  color:var(--c);font:600 14px/1 var(--sans);transition:background-color 180ms ease,color 180ms ease,border-color 180ms ease}
.q .cta svg{width:16px;height:16px;transition:transform 200ms var(--ease-out)}
.q.on .cta{background:var(--c);color:#0a0c11;border-color:var(--c)}
.q.on .cta svg{transform:translateX(3px)}
.q.tr .cta,.q.br .cta{flex-direction:row}

/* ===== v2: subdomain pages — top bar, project cards, emblem ===== */
.topbar{position:fixed;left:0;right:0;top:0;height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 var(--pad);z-index:6}
.backbtn{display:inline-flex;align-items:center;gap:10px;padding:10px 16px 10px 12px;border:1px solid #3a4152;background:#141823;border-radius:999px;
  font:600 15px/1 var(--sans);color:var(--ink);text-decoration:none;transition:border-color 160ms ease,background-color 160ms ease,transform 160ms var(--ease-out)}
.backbtn .ar{width:16px;height:16px;transition:transform 200ms var(--ease-out)}
.backbtn .ring{width:16px;height:16px}
.backbtn:active{transform:scale(.97)}
@media (hover:hover) and (pointer:fine){.backbtn:hover{border-color:var(--accent,#d7c3a0);background:#1a1f2c}.backbtn:hover .ar{transform:translateX(-3px)}}
.cards{position:fixed;left:var(--pad);right:var(--pad);top:84px;bottom:var(--pad);display:grid;column-gap:clamp(110px,15vw,240px);row-gap:clamp(28px,5vh,56px)}
.cards[data-n="4"]{grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr}
.cards[data-n="2"]{grid-template-columns:1fr 1fr;grid-template-rows:1fr;top:max(96px,calc(50svh - 300px));bottom:max(var(--pad),calc(50svh - 300px))}
.cards[data-n="1"]{grid-template-columns:minmax(0,720px);justify-content:center;top:200px}
/* five projects: three on top, two below, the emblem in the gap between the rows */
.cards[data-n="5"]{grid-template-columns:repeat(6,1fr);grid-template-rows:1fr 1fr;column-gap:clamp(18px,2.4vw,40px);row-gap:clamp(70px,12vh,130px)}
.cards[data-n="5"] .card{grid-column:span 2}
.cards[data-n="5"] .card:nth-child(4){grid-column:2 / span 2}
.cards[data-n="5"] .card:nth-child(5){grid-column:4 / span 2}
.cards[data-n="5"] .card h2{font-size:clamp(22px,2vw,32px)}
.cards[data-n="5"] .card .desc{display:none}
.card{--c:#eceae4;position:relative;display:block;overflow:hidden;border-radius:18px;background:#0e1118;border:1px solid #232838;text-decoration:none;color:var(--ink);
  transition:border-color 220ms ease,transform 200ms var(--ease-out);-webkit-tap-highlight-color:transparent}
.card canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.card .cbody{position:absolute;left:0;right:0;bottom:0;padding:18px 22px 20px;background:rgba(12,15,21,.94);border-top:1px solid #1c2130}
.card h2{margin:0;font:600 clamp(24px,2.4vw,38px)/1.05 var(--serif);letter-spacing:-.015em;color:var(--c)}
.card .meta{margin:6px 0 0;font-size:13px;color:var(--dim)}
.card .meta cite{font-style:italic;color:var(--muted)}
.card .desc{margin:8px 0 0;font-size:14.5px;line-height:1.45;color:var(--muted);max-width:60ch}
.card .cta{display:inline-flex;align-items:center;gap:8px;margin-top:14px;padding:10px 16px;border-radius:999px;background:var(--c);color:#0a0c11;font:600 14px/1 var(--sans)}
.card .cta svg{width:16px;height:16px;transition:transform 200ms var(--ease-out)}
.card .chip{display:inline-block;margin-top:14px;padding:8px 14px;border-radius:999px;border:1px dashed color-mix(in srgb,var(--c) 60%,transparent);color:var(--c);font:600 13px/1 var(--sans)}
.card:active{transform:scale(.99)}
.card.on{border-color:var(--c)}
@media (hover:hover) and (pointer:fine){.card:hover{transform:translateY(-3px)}.card:hover .cta svg{transform:translateX(4px)}}
.card.soon{cursor:default}
.emblem{position:fixed;left:50%;top:calc(84px + (100svh - 84px - var(--pad)) / 2);transform:translate(-50%,-50%);z-index:3;display:flex;align-items:center;gap:10px;
  padding:12px 18px;border-radius:14px;background:#0d1017;border:1.5px solid #2b3142;font:600 22px/1 var(--serif);white-space:nowrap}
.emblem svg{width:22px;height:22px}
.cards[data-n="1"] ~ .emblem{top:140px}
@media (max-height:760px) and (min-width:901px){.card .desc{display:none}}
@media (max-width:900px){
  .topbar{height:64px}
  .cards{top:68px;bottom:12px;left:12px;right:12px;column-gap:10px;row-gap:10px}
  .cards[data-n="2"]{grid-template-columns:1fr;grid-template-rows:1fr 1fr}
  .cards[data-n="1"]{top:76px;grid-template-columns:1fr}
  .card .cbody{padding:12px 14px 14px}
  .card .desc{display:none}
  .card .meta cite,.card .meta .by{display:none}
  .card h2{font-size:clamp(20px,5.6vw,26px)}
  .card .cta{margin-top:10px;padding:8px 12px;font-size:13px}
  .emblem{visibility:hidden}
  .cta .nm{display:none}
}

/* ===== v3: phone layouts ===== */
@media (max-width:900px){
  /* hub: the sign on top, four tappable tiles below, each with its own texture and pipe */
  .hub .sign,.sign{top:10px;transform:translateX(-50%);width:calc(100% - 20px);padding:14px 16px 16px}
  .sign h1{font-size:30px}
  .sign p{margin-top:6px;font-size:14px}
  .sign .now{display:none}
  .sign .acts{margin-top:10px}
  .hub[data-n="4"]{top:var(--signh,200px);left:10px;right:10px;bottom:10px;gap:10px}
  .hub[data-n="4"] .q{border:1px solid #232838;border-radius:16px;background:rgba(10,12,17,.25);padding:14px;
    align-items:flex-end!important;justify-content:flex-start!important;text-align:left!important}
  .hub[data-n="4"] .q.on{border-color:color-mix(in srgb,var(--c) 70%,#232838)}
  .hub[data-n="4"] .q h2{font-size:clamp(24px,7vw,30px)}
  .hub[data-n="4"] .q .meta .u{display:none}
  .hub[data-n="4"] .q ul{display:grid;margin-top:8px;font-size:12.5px;gap:1px;color:var(--muted)}
  .hub[data-n="4"] .q li span{display:none}
  .hub[data-n="4"] .q .cta{margin-top:10px;padding:8px 12px;font-size:13px}
  /* four projects: horizontal rows, animation left, text right */
  .cards[data-n="4"]{grid-template-columns:1fr;grid-template-rows:repeat(4,1fr)}
  .cards[data-n="4"] .card .cbody{left:auto;right:0;top:0;bottom:0;width:50%;border-top:0;border-left:1px solid #1c2130;display:flex;flex-direction:column;justify-content:center;padding:12px 14px}
  .cards[data-n="4"] .card h2{font-size:clamp(19px,5.2vw,24px)}
  .cards[data-n="4"] .card .cta,.cards[data-n="4"] .card .chip{align-self:flex-start}
  .cards[data-n="5"]{grid-template-columns:1fr;grid-template-rows:repeat(5,1fr);column-gap:10px;row-gap:10px}
  .cards[data-n="5"] .card,.cards[data-n="5"] .card:nth-child(4),.cards[data-n="5"] .card:nth-child(5){grid-column:auto}
  .cards[data-n="5"] .card .cbody{left:auto;right:0;top:0;bottom:0;width:50%;border-top:0;border-left:1px solid #1c2130;display:flex;flex-direction:column;justify-content:center;padding:10px 14px}
  .cards[data-n="5"] .card h2{font-size:clamp(18px,5vw,23px)}
  .cards[data-n="5"] .card .cta,.cards[data-n="5"] .card .chip{align-self:flex-start}
}