/* ============ Quant Arcade — dark trading terminal ============ */
:root{
  --bg:#06080b; --bg2:#0a0e14; --panel:#0e141d; --panel2:#121a25;
  --line:#1c2735; --line2:#28374a;
  --fg:#dbe4ee; --mut:#7d8ea3; --dim:#4c5c70;
  --grn:#00e08a; --grn-d:#00a866; --red:#ff4d5e; --amb:#ffb020;
  --blu:#3aa9ff; --vio:#a97bff; --cyn:#22d3ee;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Consolas,monospace;
  --sans:"Inter",system-ui,-apple-system,Segoe UI,sans-serif;
  --r:12px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
/* iPhone safe areas — the viewport-fit=cover meta tag lets content run under the
   notch/home-indicator, so pad the edges back out ourselves. */
body{padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}
body{
  background:
    radial-gradient(1200px 700px at 15% -10%, #0d2033 0%, transparent 60%),
    radial-gradient(900px 600px at 90% 0%, #131029 0%, transparent 55%),
    var(--bg);
  color:var(--fg); font-family:var(--sans); -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.35;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px; mask-image:radial-gradient(1000px 700px at 50% 0%,#000 0%,transparent 80%);
  -webkit-mask-image:radial-gradient(1000px 700px at 50% 0%,#000 0%,transparent 80%);
}
#app{position:relative;z-index:1}
.screen{display:none;max-width:1240px;margin:0 auto;padding:22px 20px calc(60px + env(safe-area-inset-bottom))}
.screen.active{display:block;animation:fadeUp .28s ease both}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ---------- masthead ---------- */
.masthead{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;flex-wrap:wrap;padding:14px 0 20px;border-bottom:1px solid var(--line)}
.mast-left{display:flex;gap:16px;align-items:center}
.logo{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;font-family:var(--mono);font-weight:700;font-size:22px;
  background:linear-gradient(145deg,#0f2a22,#0b1620);border:1px solid var(--line2);color:var(--grn);box-shadow:0 0 24px rgba(0,224,138,.15) inset}
.logo span{color:var(--fg)}
h1{font-size:26px;letter-spacing:.14em;font-weight:800}
.tag{color:var(--mut);font-size:13.5px;margin-top:3px}
.desk-rating{text-align:right;font-family:var(--mono);border:1px solid var(--line);background:var(--panel);border-radius:var(--r);padding:10px 16px;min-width:190px}
.dr-label{display:block;font-size:10px;letter-spacing:.18em;color:var(--dim)}
.dr-value{display:block;font-size:30px;font-weight:700;color:var(--grn);line-height:1.15}
.dr-sub{display:block;font-size:11px;color:var(--mut)}

/* ---------- toolbar ---------- */
.toolbar{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;margin:18px 0 16px}
.filters{display:flex;gap:8px;flex-wrap:wrap}
.chip{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;padding:7px 13px;border-radius:999px;border:1px solid var(--line2);
  background:var(--panel);color:var(--mut);cursor:pointer;transition:.16s}
.chip:hover{color:var(--fg);border-color:var(--dim)}
.chip.on{background:var(--fg);color:#06080b;border-color:var(--fg);font-weight:700}
.tools{display:flex;gap:8px}

/* ---------- buttons ---------- */
.btn{font-family:var(--sans);font-weight:600;font-size:14px;padding:11px 20px;border-radius:10px;cursor:pointer;
  border:1px solid var(--line2);background:var(--panel2);color:var(--fg);transition:.15s}
.btn:hover{border-color:var(--dim);transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn.primary{background:linear-gradient(140deg,var(--grn),var(--grn-d));color:#04120c;border-color:transparent;box-shadow:0 6px 20px rgba(0,224,138,.22)}
.btn.ghost{background:transparent;color:var(--mut)}
.btn.sm{font-size:12px;padding:8px 13px}
.back{background:none;border:none;color:var(--mut);font-family:var(--mono);font-size:12.5px;cursor:pointer;padding:6px 0;margin-bottom:10px}
.back:hover{color:var(--fg)}

/* ---------- game grid ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(268px,1fr));gap:14px}
.card{position:relative;background:linear-gradient(160deg,var(--panel),#0a0f16);border:1px solid var(--line);border-radius:var(--r);
  padding:16px;cursor:pointer;overflow:hidden;transition:.18s;display:flex;flex-direction:column;gap:9px;min-height:172px}
.card:hover{transform:translateY(-3px);border-color:var(--line2);box-shadow:0 14px 34px rgba(0,0,0,.5)}
.card::after{content:"";position:absolute;left:0;top:0;height:2px;width:100%;background:var(--accent,var(--grn));opacity:.65}
.card .num{font-family:var(--mono);font-size:10.5px;color:var(--dim);letter-spacing:.1em}
.card h3{font-size:16.5px;font-weight:700;line-height:1.25}
.card p{font-size:12.6px;color:var(--mut);line-height:1.5;flex:1}
.card .cardfoot{display:flex;justify-content:space-between;align-items:center;font-family:var(--mono);font-size:10.5px;color:var(--dim)}
.card .best{color:var(--grn)}
.cat-chip{display:inline-block;font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;padding:3px 8px;border-radius:5px;
  background:color-mix(in srgb,var(--accent,#00e08a) 15%,transparent);color:var(--accent,var(--grn));border:1px solid color-mix(in srgb,var(--accent,#00e08a) 30%,transparent)}
.badge{position:absolute;top:12px;right:12px;font-family:var(--mono);font-size:9px;letter-spacing:.1em;padding:3px 7px;border-radius:4px;font-weight:700}
.badge.b1{background:var(--amb);color:#1a1000}
.badge.b5{background:var(--vio);color:#0d0520}
.badge.b10{background:var(--blu);color:#001424}

/* ---------- brief ---------- */
.brief-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;overflow:hidden;max-width:900px;margin:0 auto}
.brief-head{padding:26px 28px 22px;border-bottom:1px solid var(--line);background:linear-gradient(160deg,#101922,#0b1017)}
.brief-head h2{font-size:29px;margin:10px 0 8px;font-weight:800}
.brief-head p{color:var(--mut);font-size:14.5px;line-height:1.6;max-width:64ch}
.brief-body{display:grid;grid-template-columns:1fr 1.35fr;gap:26px;padding:24px 28px}
.brief-col h4{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;color:var(--dim);margin-bottom:11px}
.brief-col ul{list-style:none;display:flex;flex-direction:column;gap:7px}
.brief-col li{font-size:13.5px;color:var(--fg);padding-left:15px;position:relative}
.brief-col li::before{content:"\25B8";position:absolute;left:0;color:var(--grn)}
#briefRules{font-size:13.6px;line-height:1.68;color:var(--mut)}
#briefRules b,#briefRules kbd{color:var(--fg)}
#briefRules p{margin-bottom:9px}
kbd{font-family:var(--mono);font-size:11.5px;background:var(--panel2);border:1px solid var(--line2);border-bottom-width:2px;border-radius:5px;padding:1px 6px}
.variant-pick{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding:0 28px 28px}
.vbtn{text-align:left;padding:17px 19px;border-radius:12px;border:1px solid var(--line2);background:var(--panel2);cursor:pointer;transition:.16s;color:var(--fg);font-family:var(--sans)}
.vbtn:hover{border-color:var(--grn);transform:translateY(-2px)}
.vbtn strong{display:block;font-size:16px;margin-bottom:5px;color:var(--fg)}
.vbtn span{font-size:12.4px;color:var(--mut);line-height:1.5;display:block}
.vbtn em{display:block;font-family:var(--mono);font-size:10.5px;color:var(--dim);margin-top:9px;font-style:normal}

/* ---------- HUD ---------- */
.hud{display:flex;align-items:center;gap:18px;justify-content:space-between;flex-wrap:wrap;padding-bottom:10px}
.hud-title{font-weight:700;font-size:16px;display:flex;align-items:baseline;gap:9px}
.hud-title small{font-family:var(--mono);font-size:10.5px;color:var(--dim);letter-spacing:.12em}
.hud-stats{display:flex;gap:8px}
.stat{font-family:var(--mono);background:var(--panel);border:1px solid var(--line);border-radius:9px;padding:6px 13px;text-align:right;min-width:76px}
.stat label{display:block;font-size:9px;letter-spacing:.16em;color:var(--dim)}
.stat span{font-size:19px;font-weight:700}
.stat.time span{color:var(--grn)}
.stat.time.warn span{color:var(--amb)}
.stat.time.crit span{color:var(--red);animation:pulse .7s infinite}
@keyframes pulse{50%{opacity:.42}}
.timebar{height:4px;background:var(--panel2);border-radius:3px;overflow:hidden;margin-bottom:18px}
#timeFill{height:100%;width:100%;background:linear-gradient(90deg,var(--grn),var(--cyn));transition:width .1s linear}
#timeFill.warn{background:linear-gradient(90deg,var(--amb),#ff8a3d)}
#timeFill.crit{background:linear-gradient(90deg,var(--red),#ff2d55)}

.stage{min-height:470px;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:26px;position:relative;overflow:hidden}
.score-pop{position:absolute;font-family:var(--mono);font-weight:700;font-size:22px;pointer-events:none;animation:pop 1s ease-out forwards;z-index:9}
@keyframes pop{0%{opacity:0;transform:translateY(6px) scale(.85)}22%{opacity:1;transform:translateY(-6px) scale(1.08)}100%{opacity:0;transform:translateY(-46px) scale(1)}}
.toast-layer{position:fixed;bottom:calc(26px + env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);display:flex;flex-direction:column;gap:8px;z-index:50;pointer-events:none;align-items:center}
.toast{font-family:var(--mono);font-size:12.5px;padding:9px 16px;border-radius:8px;background:#0d1620;border:1px solid var(--line2);animation:tin .3s ease both}
.toast.good{border-color:var(--grn-d);color:var(--grn)}
.toast.bad{border-color:#8a2130;color:var(--red)}
@keyframes tin{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ---------- generic play widgets ---------- */
.prompt{text-align:center;margin-bottom:22px}
.prompt .q{font-size:clamp(20px,3.1vw,32px);font-weight:700;line-height:1.4}
.prompt .sub{color:var(--mut);font-size:13.5px;margin-top:9px;line-height:1.55;max-width:72ch;margin-left:auto;margin-right:auto}
.prompt .eyebrow{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;color:var(--dim);margin-bottom:10px}
.bignum{font-family:var(--mono);font-size:clamp(30px,6vw,58px);font-weight:700;letter-spacing:.02em}
.choices{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:11px;max-width:760px;margin:0 auto}
.choices.two{grid-template-columns:1fr 1fr;max-width:520px}
.choices.wide{grid-template-columns:1fr;max-width:640px}
.choice{position:relative;font-family:var(--mono);font-size:18px;font-weight:600;padding:19px 14px;border-radius:11px;border:1px solid var(--line2);
  background:var(--panel2);color:var(--fg);cursor:pointer;transition:.13s;text-align:center}
.choice:hover:not(:disabled){border-color:var(--grn);background:#16212e;transform:translateY(-2px)}
.choice:disabled{cursor:default}
.choice .key{position:absolute;top:6px;left:8px;font-size:9.5px;color:var(--dim)}
.choice.right{background:rgba(0,224,138,.14);border-color:var(--grn);color:var(--grn)}
.choice.wrong{background:rgba(255,77,94,.13);border-color:var(--red);color:var(--red)}
.choice.miss{opacity:.4}
.choice small{display:block;font-family:var(--sans);font-size:11.5px;color:var(--mut);margin-top:5px;font-weight:400}
.numpad{display:flex;flex-direction:column;align-items:center;gap:13px}
.numin{font-family:var(--mono);font-size:34px;font-weight:700;text-align:center;width:290px;max-width:88vw;padding:12px;border-radius:11px;
  background:var(--panel2);border:1px solid var(--line2);color:var(--fg);outline:none}
.numin:focus{border-color:var(--grn);box-shadow:0 0 0 3px rgba(0,224,138,.12)}
.hint{font-family:var(--mono);font-size:11.5px;color:var(--dim);text-align:center}
.fb{text-align:center;font-family:var(--mono);font-size:14px;margin-top:16px;min-height:22px}
.fb.good{color:var(--grn)} .fb.bad{color:var(--red)} .fb.neut{color:var(--mut)}
canvas{display:block;max-width:100%}
.center{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px}
.row{display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap}
.slider{width:min(560px,92%);accent-color:#00e08a}
.tick{font-family:var(--mono);color:var(--mut);font-size:12px}
.mono{font-family:var(--mono)}
.up{color:var(--grn)} .down{color:var(--red)} .amber{color:var(--amb)} .muted{color:var(--mut)}
.panelbox{background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.flash-in{animation:fadeUp .18s ease both}

/* ---------- results ---------- */
.res-card{max-width:760px;margin:20px auto;background:var(--panel);border:1px solid var(--line);border-radius:18px;overflow:hidden}
.res-head{text-align:center;padding:34px 26px 26px;background:linear-gradient(170deg,#101a24,#0a0f16);border-bottom:1px solid var(--line)}
.res-game{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--dim)}
.res-score{font-family:var(--mono);font-size:76px;font-weight:700;line-height:1.05;margin:6px 0}
.res-band{display:inline-block;font-family:var(--mono);font-weight:700;letter-spacing:.12em;font-size:14px;padding:8px 20px;border-radius:999px;margin-top:4px}
.res-pct{color:var(--mut);font-size:13px;margin-top:12px}
.ladder{padding:22px 26px;display:flex;flex-direction:column;gap:9px}
.rung{display:flex;align-items:center;gap:12px;font-family:var(--mono);font-size:12.5px}
.rung .lbl{width:78px;color:var(--mut)}
.rung .bar{flex:1;height:9px;border-radius:5px;background:var(--panel2);overflow:hidden;border:1px solid var(--line)}
.rung .bar i{display:block;height:100%;border-radius:5px;transition:width .8s cubic-bezier(.2,.8,.2,1)}
.rung .val{width:62px;text-align:right;color:var(--dim)}
.rung.hit .lbl,.rung.hit .val{color:var(--fg)}
.res-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(112px,1fr));gap:11px;padding:0 26px 20px}
.rs{background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:12px;text-align:center}
.rs label{display:block;font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;color:var(--dim);margin-bottom:5px}
.rs span{font-family:var(--mono);font-size:20px;font-weight:700}
.res-notes{padding:0 26px 20px;font-size:13px;color:var(--mut);line-height:1.65}
.res-notes b{color:var(--fg)}
.res-actions{display:flex;gap:11px;padding:0 26px 28px;flex-wrap:wrap}
.res-actions .btn{flex:1;min-width:130px}

/* ---------- modal ---------- */
.modal{position:fixed;inset:0;background:rgba(3,5,8,.82);backdrop-filter:blur(6px);display:none;place-items:center;z-index:100;padding:20px}
.modal.on{display:grid}
.modal-box{position:relative;max-width:660px;width:100%;max-height:84vh;overflow:auto;background:var(--panel);border:1px solid var(--line2);border-radius:16px;padding:32px}
.modal-x{position:absolute;top:14px;right:16px;background:none;border:none;color:var(--mut);font-size:17px;cursor:pointer}
.modal-box h3{font-size:21px;margin-bottom:14px}
.modal-box h4{font-size:14px;margin:20px 0 8px;color:var(--grn);font-family:var(--mono);letter-spacing:.06em}
.modal-box p,.modal-box li{font-size:13.6px;line-height:1.7;color:var(--mut);margin-bottom:9px}
.modal-box li{margin-left:18px}
.modal-box b{color:var(--fg)}

.foot{margin-top:34px;padding-top:18px;border-top:1px solid var(--line);color:var(--dim);font-size:12px}
.foot p{margin-top:6px}
.foot p:first-child{margin-top:0}
.foot code{font-family:var(--mono);color:var(--mut)}
.foot a{color:var(--grn);text-decoration:none}
.foot a:hover{text-decoration:underline}

@media(max-width:760px){
  .brief-body{grid-template-columns:1fr}
  .variant-pick{grid-template-columns:1fr}
  .hud-stats{width:100%;justify-content:space-between}
  .stat{min-width:0;flex:1;padding:6px 8px}
  .stage{padding:18px 14px;min-height:430px}
  .res-score{font-size:58px}
  .choices{grid-template-columns:1fr 1fr}
}