/* Layout: the game's research screen. A control bar on top, the graph canvas filling the screen,
   and a detail panel for the selected item on the right (a bottom sheet on phones).
   Single dark theme on purpose: it's the in-game UI. */
:root{
  --bg:#141416; --canvas:#1d1e21; --grid:#25262a; --panel:#2b2b2d; --panel-2:#323234; --inset:#121213; --edge:#0b0b0c; --hi:#4a4a4e;
  --fg:#ece6d8; --muted:#a59e8f; --head:#e8ddc0; --head-ink:#2a2418;
  --accent:#f4a31a; --accent-ink:#1a1206;
  --craft:#3a3936; --craft-hi:#5b584f;
  --raw:#355a22; --raw-hi:#5f9a3a; --raw-fg:#b5e38d;
  --fluid:#1e3c63; --fluid-hi:#3f75b6; --fluid-fg:#9cc7ff;
  --off:#552826; --off-hi:#8d4640;
  --line:#8b8576; --line-hot:#f4a31a; --loop:#d26a5c;
  --display:"Titillium Web","Segoe UI",system-ui,sans-serif; --mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  color-scheme:dark;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{background:var(--bg);color:var(--fg);font:15px/1.4 var(--display);display:flex;flex-direction:column;overflow:hidden}
button,select,input{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ---- top bar ---- */
.bar{flex:none;background:var(--panel);border-bottom:2px solid var(--edge);box-shadow:inset 0 1px 0 var(--hi),0 3px 10px rgba(0,0,0,.5);z-index:5;
  padding:10px max(16px,env(safe-area-inset-right,0px)) 10px max(16px,env(safe-area-inset-left,0px))}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
h1{font:700 19px/1 var(--display);margin:0;color:var(--head);letter-spacing:.01em;white-space:nowrap}
.search{position:relative;flex:1 1 260px;min-width:0}
.search input{width:100%;background:var(--inset);border:2px solid var(--edge);box-shadow:inset 0 2px 3px rgba(0,0,0,.6);border-radius:2px;padding:7px 11px;font-size:16px}
.results{position:absolute;z-index:30;left:0;right:0;top:calc(100% + 4px);max-height:min(60vh,460px);overflow:auto;background:var(--panel-2);border:2px solid var(--edge);border-radius:3px;box-shadow:0 8px 24px rgba(0,0,0,.6)}
.results button{display:flex;align-items:center;gap:10px;width:100%;text-align:left;background:none;border:0;padding:5px 10px;cursor:pointer}
.results button:hover,.results button.on{background:#3e3c37}
.results .id{margin-left:auto;font:12px var(--mono);color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:45%}
.chk{display:flex;align-items:center;gap:7px;font-weight:600;font-size:14px;color:var(--muted);cursor:pointer;user-select:none;white-space:nowrap}
.chk input{accent-color:var(--accent);width:16px;height:16px}
.btn{background:#4a4740;border:2px solid var(--edge);box-shadow:inset 0 1px 0 #6b675d;border-radius:2px;padding:4px 11px;font-weight:700;cursor:pointer;white-space:nowrap}
.btn:hover{background:#5a564c}
.btn.sq{width:32px;padding:4px 0;text-align:center}
.btn.primary{background:var(--accent);color:var(--accent-ink);box-shadow:inset 0 1px 0 #ffd27a}
.btn.primary:hover{background:#ffb534}
.depth{display:flex;align-items:center;gap:6px;font-weight:600;font-size:14px;color:var(--muted)}
.depth output{font:700 15px var(--mono);color:var(--fg);min-width:1.6ch;text-align:center}
.chips{display:flex;gap:6px;margin-top:8px;overflow-x:auto;scrollbar-width:thin;padding-bottom:2px}
.chips button{flex:none;display:flex;align-items:center;gap:6px;background:var(--inset);border:1px solid var(--edge);border-radius:2px;padding:3px 8px 3px 4px;cursor:pointer;font-size:13px;white-space:nowrap}
.chips button:hover,.chips button.on{border-color:var(--accent)}
.legend{display:flex;gap:12px;flex-wrap:wrap;font-size:12.5px;color:var(--muted);margin-top:7px}
.legend span{display:flex;gap:5px;align-items:center}
.sw{width:14px;height:14px;border-radius:2px;border:1px solid var(--edge)}

/* ---- main ---- */
.main{flex:1;min-height:0;display:flex}
.view{flex:1;min-width:0;position:relative;overflow:hidden;cursor:grab;touch-action:none;
  background-color:var(--canvas)}
#cv{position:absolute;left:0;top:0;display:block}
.tip{position:absolute;z-index:5;pointer-events:none;background:#0d0d0e;border:1px solid #47474a;color:var(--fg);font:600 13px var(--display);padding:3px 8px;border-radius:2px;white-space:nowrap}
.view.drag{cursor:grabbing}
.world{position:absolute;left:0;top:0;transform-origin:0 0}
.world svg{position:absolute;left:0;top:0;overflow:visible;pointer-events:none}
.e{fill:none;stroke:var(--line);stroke-width:2;opacity:.75;vector-effect:non-scaling-stroke}
.view.all .e{opacity:.28;stroke-width:1.2}
.view.all .e.fl{opacity:.25}
.e.fl{stroke:var(--fluid-hi)}
.e.loop{stroke:var(--loop);stroke-dasharray:7 6;opacity:.8}
.e.hot,.view.all .e.hot{stroke:var(--line-hot);opacity:1;stroke-width:3}
.e.use,.view.all .e.use{stroke:#62d0bf;opacity:1;stroke-width:2.5}
.view.all .e.dim{opacity:.05}
.e.dim{opacity:.18}
.view.far .lbl,.view.far .badge,.view.far .kind{visibility:hidden}
.view.all .exp{display:none}
.tier{position:absolute;left:12px;font:700 26px/1 var(--mono);color:#5d5a52;white-space:nowrap;pointer-events:none}
.tier small{display:block;font:600 15px/1.3 var(--display);color:#77736a;margin-top:4px}
.n.use .tile{box-shadow:0 0 0 2px #62d0bf}
body.all .depth{display:none}
.mode{display:flex;gap:0}
.mode .btn{border-radius:0}.mode .btn:first-child{border-radius:2px 0 0 2px}.mode .btn:last-child{border-radius:0 2px 2px 0}
.mode .btn.on{background:var(--accent);color:var(--accent-ink);box-shadow:inset 0 1px 0 #ffd27a}
.mode .btn:disabled{opacity:.45;cursor:default}
.zoombox{position:absolute;right:12px;bottom:12px;display:flex;flex-direction:column;gap:6px;z-index:4}
.foot{position:absolute;left:12px;right:56px;bottom:12px;display:flex;flex-direction:column;align-items:flex-start;gap:4px;z-index:4;pointer-events:none}
.status{font:12px var(--mono);color:var(--muted);background:rgba(20,20,22,.8);padding:4px 8px;border-radius:2px}
.status:empty{display:none}

/* ---- research-tree style cards ---- */
.n{position:absolute;width:112px;display:flex;flex-direction:column;align-items:center;cursor:pointer;user-select:none}
.tile{position:relative;width:84px;height:84px;display:grid;place-items:center;border-radius:3px;
  background:linear-gradient(180deg,var(--craft-hi),var(--craft) 55%);border:2px solid var(--edge);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.18),inset 0 -3px 0 rgba(0,0,0,.35),0 3px 6px rgba(0,0,0,.5)}
.n.raw .tile{background:linear-gradient(180deg,var(--raw-hi),var(--raw) 60%)}
.n.fluid .tile{background:linear-gradient(180deg,var(--fluid-hi),var(--fluid) 60%)}
.n.off .tile{background:linear-gradient(180deg,var(--off-hi),var(--off) 60%)}
.n.root .tile{outline:3px solid var(--accent);outline-offset:2px}
.n.sel .tile{box-shadow:0 0 0 3px #fff,0 0 18px 4px rgba(244,163,26,.65)}
.n.dim{opacity:.35}
.n:hover .tile{filter:brightness(1.18)}
.lbl{margin-top:5px;width:112px;min-height:32px;text-align:center;font:600 12.5px/1.2 var(--display);color:var(--fg);
  text-shadow:0 1px 2px #000;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;text-wrap:balance}
.badge{position:absolute;right:-7px;top:-7px;min-width:20px;height:20px;padding:0 4px;border-radius:10px;background:var(--accent);color:var(--accent-ink);
  font:700 11px/20px var(--mono);text-align:center;border:1px solid var(--edge)}
.exp{position:absolute;left:50%;top:-14px;transform:translateX(-50%);width:26px;height:22px;border-radius:3px;border:1px solid var(--edge);
  background:var(--accent);color:var(--accent-ink);font:700 16px/1 var(--mono);display:grid;place-items:center;cursor:pointer;padding:0;z-index:2}
.exp:hover{background:#ffc04d}
.kind{position:absolute;left:3px;bottom:2px;font:700 9px/1 var(--mono);letter-spacing:.06em;text-transform:uppercase;color:#fff;opacity:.85;text-shadow:0 1px 1px #000}

/* ---- icons from the sprite sheet ---- */
.ic{flex:none;display:inline-block;background-repeat:no-repeat;border-radius:2px}
.ic.ph{display:inline-grid;place-items:center;font:700 11px/1 var(--mono);color:#14110c;border:1px solid rgba(0,0,0,.4);background-image:none}

/* ---- detail panel ---- */
.side{flex:none;width:370px;background:var(--panel);border-left:2px solid var(--edge);display:flex;flex-direction:column;min-height:0;z-index:4}
.side .hd{background:var(--head);color:var(--head-ink);font:700 16px/1.15 var(--display);padding:9px 12px;border-bottom:2px solid var(--edge);display:flex;align-items:center;gap:10px}
.side .hd .x{margin-left:auto;display:none;background:none;border:0;font:700 20px/1 var(--mono);color:var(--head-ink);cursor:pointer;padding:2px 6px}
.side .bd{padding:12px;overflow:auto;display:flex;flex-direction:column;gap:12px}
.sec{font:700 12px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:4px 0 -4px}
.card{background:var(--panel-2);border:1px solid var(--edge);border-left:3px solid var(--accent);border-radius:2px;padding:9px 10px;display:flex;flex-direction:column;gap:8px}
.card select{background:var(--inset);border:1px solid var(--edge);border-radius:2px;padding:4px 6px;width:100%;font-size:14px}
.flow{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.slot{flex:none;display:grid;place-items:center;width:44px;height:44px;background:var(--inset);border:1px solid var(--edge);box-shadow:inset 0 2px 3px rgba(0,0,0,.7);border-radius:2px;position:relative;cursor:pointer}
.slot.fluid{border-color:#2d5689}
.slot .amt{position:absolute;right:2px;bottom:0;font:700 12px/1 var(--display);color:#fff;text-shadow:0 0 2px #000,0 0 2px #000,1px 1px 0 #000}
.arrow{color:var(--muted);font:700 15px var(--mono)}
.meta{font:12.5px var(--mono);color:var(--muted);font-variant-numeric:tabular-nums}
.made{display:flex;gap:4px;flex-wrap:wrap;align-items:center}
.acts{display:flex;gap:8px;flex-wrap:wrap}
.note{font-size:14px;color:var(--muted)}
.use{display:flex;align-items:center;gap:8px;background:var(--inset);border:1px solid var(--edge);border-radius:2px;padding:4px 8px 4px 4px;cursor:pointer;text-align:left;width:100%}
.use:hover{border-color:var(--accent)}
.use .nm{font-weight:600;font-size:14px;line-height:1.15;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.use .c{margin-left:auto;font:11px var(--mono);color:var(--muted);white-space:nowrap}
.uses{display:flex;flex-direction:column;gap:5px}
.loading{position:absolute;inset:0;display:grid;place-items:center;color:var(--muted);font-size:16px}

@media (max-width:860px){
  .side{position:fixed;left:0;right:0;bottom:0;width:auto;max-height:52vh;border-left:0;border-top:2px solid var(--edge);transform:translateY(105%);transition:transform .2s ease-out;box-shadow:0 -8px 24px rgba(0,0,0,.6)}
  .side.open{transform:none}
  .side .hd .x{display:block}
  .legend{display:none}
  h1{font-size:17px}
}
@media (prefers-reduced-motion:reduce){.side{transition:none}}
.credit{font-size:11.5px;color:var(--muted);background:rgba(20,20,22,.8);padding:3px 8px;border-radius:2px}
.credit a{color:inherit}