:root{
  --bg:#070a14; --bg2:#0d1426; --panel:rgba(16,24,44,.82); --panel2:rgba(24,34,60,.9);
  --line:rgba(120,200,255,.18); --cy:#5ff0ff; --cy2:#2bd4e6; --or:#ff7a3c; --go:#f7c850;
  --green:#5fe08a; --red:#ff5c6e; --txt:#dce6f5; --dim:#8ea2c2;
  --glow:0 0 18px rgba(95,240,255,.35);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden;background:var(--bg);color:var(--txt);
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased;user-select:none}
.hidden{display:none!important}
canvas{display:block}
#bg{position:fixed;inset:0;z-index:0}
.screen{position:fixed;inset:0;z-index:1}
b{color:#fff}
kbd{background:#1b2843;border:1px solid var(--line);border-radius:5px;padding:1px 6px;font-family:ui-monospace,monospace;font-size:.82em;color:var(--cy)}
.cy{color:var(--cy)} .go{color:var(--go)}

/* ---------- AUTH ---------- */
#auth{display:grid;place-items:center;background:radial-gradient(120% 90% at 50% -10%,#16224a 0%,#070a14 60%)}
.auth-card{width:min(92vw,420px);background:var(--panel);backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:20px;padding:38px 34px;box-shadow:0 30px 80px rgba(0,0,0,.6),inset 0 1px 0 rgba(255,255,255,.05);text-align:center}
.logo{font-size:46px;font-weight:900;letter-spacing:4px;color:#fff;text-shadow:var(--glow)}
.logo span{color:var(--or);text-shadow:0 0 18px rgba(255,122,60,.5)}
.tagline{color:var(--dim);margin:8px 0 26px;font-size:14px}
.tabs{display:flex;gap:8px;margin-bottom:18px}
.tab{flex:1;padding:11px;border:1px solid var(--line);background:transparent;color:var(--dim);border-radius:11px;cursor:pointer;font-weight:600;transition:.15s}
.tab.active{background:linear-gradient(180deg,rgba(95,240,255,.18),rgba(95,240,255,.05));color:var(--cy);border-color:var(--cy2);box-shadow:var(--glow)}
form{display:flex;flex-direction:column;gap:12px}
input{padding:14px 16px;background:#0b1326;border:1px solid var(--line);border-radius:11px;color:#fff;font-size:15px;outline:none;transition:.15s}
input:focus{border-color:var(--cy2);box-shadow:var(--glow)}
.btn-primary{padding:14px;border:none;border-radius:11px;cursor:pointer;font-weight:800;font-size:15px;letter-spacing:1px;
  background:linear-gradient(135deg,var(--or),#ff5c6e);color:#fff;box-shadow:0 8px 24px rgba(255,92,110,.35);transition:.15s}
.btn-primary:hover{filter:brightness(1.1);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.err{color:var(--red);font-size:13px;min-height:18px;font-weight:600}
.hint{color:var(--dim);font-size:12px;margin-top:18px;line-height:1.5}

/* ---------- GAME ---------- */
#view{position:absolute;inset:0;width:100%;height:100%;image-rendering:pixelated;z-index:1}
#hud-top{position:absolute;top:0;left:0;right:0;z-index:5;display:flex;justify-content:space-between;
  align-items:flex-start;padding:12px 14px;gap:12px;pointer-events:none}
.meters{display:flex;flex-direction:column;gap:7px}
.meter{display:flex;align-items:center;gap:8px}
.meter .ic{width:22px;height:22px;flex:none}
.bar{width:168px;height:13px;background:#0a1124;border:1px solid var(--line);border-radius:8px;overflow:hidden;box-shadow:inset 0 2px 4px rgba(0,0,0,.5)}
.bar i{display:block;height:100%;width:100%;border-radius:8px;transition:width .35s ease}
.meter[data-m=oxygen] .bar i{background:linear-gradient(90deg,#2bd4e6,#5ff0ff)}
.meter[data-m=energy] .bar i{background:linear-gradient(90deg,#f7a23c,#f7c850)}
.meter[data-m=power]  .bar i{background:linear-gradient(90deg,#7d6bff,#b06bff)}
.status{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.chip{pointer-events:auto;display:flex;align-items:center;gap:7px;background:var(--panel);border:1px solid var(--line);
  border-radius:11px;padding:8px 12px;font-size:14px;font-weight:600;backdrop-filter:blur(8px)}
.chip .ic{width:18px;height:18px}
.chip.online{color:var(--green)} .chip.online b{color:var(--green)}
#credits b{color:var(--go)}

.iconbtn{position:absolute;top:14px;right:14px;z-index:7;width:42px;height:42px;border-radius:11px;border:1px solid var(--line);
  background:var(--panel);color:var(--cy);font-size:20px;cursor:pointer;backdrop-filter:blur(8px);display:none}
#leaderboard{top:70px;right:14px}
.panel{position:absolute;z-index:6;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:14px 16px;backdrop-filter:blur(12px)}
#leaderboard{top:70px;right:14px;width:230px;box-shadow:0 20px 60px rgba(0,0,0,.5)}
#leaderboard h3{font-size:13px;color:var(--cy);text-transform:uppercase;letter-spacing:1px;margin-bottom:10px}
#board{list-style:none;display:flex;flex-direction:column;gap:6px}
#board li{display:flex;justify-content:space-between;font-size:13px;color:var(--dim);padding:3px 0}
#board li b{color:#fff} #board li span{color:var(--go);font-weight:700}
#board li.me{color:var(--cy)} #board li:nth-child(1) span{color:var(--cy)}

/* toolbar */
#toolbar{position:absolute;bottom:14px;left:50%;transform:translateX(-50%);z-index:6;display:flex;gap:8px;
  background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:9px;backdrop-filter:blur(12px);
  box-shadow:0 16px 50px rgba(0,0,0,.5);max-width:96vw;overflow-x:auto}
.slot{position:relative;width:56px;height:56px;border-radius:12px;border:1px solid var(--line);background:#0b1326;
  cursor:pointer;display:grid;place-items:center;flex:none;transition:.12s}
.slot:hover{border-color:var(--cy2);transform:translateY(-2px)}
.slot.active{border-color:var(--cy);box-shadow:var(--glow);background:#10203a}
.slot canvas,.slot .emoji{width:40px;height:40px;image-rendering:pixelated}
.slot .emoji{font-size:28px;display:grid;place-items:center}
.slot .key{position:absolute;top:2px;left:4px;font-size:10px;color:var(--dim)}
.slot .ct{position:absolute;bottom:1px;right:4px;font-size:12px;font-weight:800;color:#fff;text-shadow:0 1px 3px #000}
.slot .lbl{position:absolute;bottom:-17px;left:0;right:0;text-align:center;font-size:10px;color:var(--dim)}
.slot.sep{background:transparent;border:none;width:1px;pointer-events:none}

/* toasts */
#toasts{position:absolute;bottom:90px;left:50%;transform:translateX(-50%);z-index:9;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}
.toast{background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:10px 16px;font-size:14px;font-weight:600;
  animation:pop .25s ease,fade .4s ease 1.6s forwards;box-shadow:0 8px 24px rgba(0,0,0,.5)}
.toast.good{border-color:var(--green);color:var(--green)}
.toast.bad{border-color:var(--red);color:var(--red)}
@keyframes pop{from{transform:translateY(12px) scale(.9);opacity:0}to{transform:none;opacity:1}}
@keyframes fade{to{opacity:0;transform:translateY(-8px)}}

/* modals */
.modal{position:absolute;inset:0;z-index:20;display:grid;place-items:center;background:rgba(4,7,15,.7);backdrop-filter:blur(4px)}
.modal-card{width:min(94vw,540px);max-height:86vh;overflow:auto;background:var(--panel);border:1px solid var(--line);
  border-radius:18px;padding:22px;box-shadow:0 30px 90px rgba(0,0,0,.7)}
.modal-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.modal-head h2{font-size:22px;color:#fff}
.x{background:transparent;border:none;color:var(--dim);font-size:20px;cursor:pointer}
.shop-tabs{display:flex;gap:8px;margin-bottom:14px}
.stab{flex:1;padding:9px;border:1px solid var(--line);background:transparent;color:var(--dim);border-radius:9px;cursor:pointer;font-weight:600}
.stab.active{background:rgba(95,240,255,.12);color:var(--cy);border-color:var(--cy2)}
.shop-list{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.shop-item{display:flex;align-items:center;gap:10px;background:#0b1326;border:1px solid var(--line);border-radius:12px;padding:10px}
.shop-item canvas{width:38px;height:38px;image-rendering:pixelated;flex:none}
.shop-item .info{flex:1;min-width:0}
.shop-item .nm{font-size:13px;font-weight:700;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.shop-item .pr{font-size:12px;color:var(--go)}
.shop-item .own{font-size:11px;color:var(--dim)}
.shop-item button{margin-left:auto;padding:7px 12px;border:none;border-radius:8px;background:var(--cy2);color:#04222a;font-weight:800;cursor:pointer;font-size:13px}
.shop-item button:hover{filter:brightness(1.12)}
.shop-item button:disabled{opacity:.4;cursor:not-allowed}
.manual{display:flex;flex-direction:column;gap:11px;color:var(--dim);font-size:14px;line-height:1.55}
.manual b{color:var(--txt)}

#ctx{position:absolute;bottom:84px;right:16px;z-index:8;padding:14px 20px;border-radius:14px;border:none;
  background:linear-gradient(135deg,var(--cy2),#2b8de6);color:#04222a;font-weight:800;font-size:15px;cursor:pointer;box-shadow:0 10px 30px rgba(43,212,230,.4)}

.overlay{position:absolute;inset:0;z-index:30;display:grid;place-items:center;gap:16px;background:rgba(4,7,15,.85);color:var(--dim)}
.spinner{width:44px;height:44px;border:3px solid var(--line);border-top-color:var(--cy);border-radius:50%;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

@media (max-width:640px){
  .bar{width:120px} .logo{font-size:38px} .slot{width:48px;height:48px}
  .iconbtn{display:block}
  #leaderboard{display:none} #leaderboard.show{display:block}
}