/* Shared tokens, page chrome (nav, footer, buttons) for the hub and every game. Dark by design. */
:root{
  --bg:#07090f; --bg-2:#0c1019; --card:#11151f; --card-2:#161b28;
  --line:rgba(255,255,255,.08); --line-2:rgba(255,255,255,.15);
  --fg:#eef1f7; --muted:#8d94a6; --dim:#5d6476;
  --accent:#5b6cff; --accent-2:#8f9cff; --cyan:#3dd6c6;
  --good:#3fbf7f; --mid:#e0a43a; --bad:#e5484d;
  --radius:18px; --radius-sm:10px;
  --font:"Archivo","Helvetica Neue",Arial,sans-serif;
  --nav-h:64px;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{background:var(--bg);-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;min-height:100vh;color:var(--fg);font-family:var(--font);font-size:16px;line-height:1.5;
  background:
    radial-gradient(900px 520px at 85% -10%,rgba(91,108,255,.18),transparent 60%),
    radial-gradient(700px 500px at -10% 30%,rgba(61,214,198,.07),transparent 60%),
    var(--bg);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
body::before{ /* faint survey grid */
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.5;
  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(ellipse at 50% 0%,#000 0%,transparent 70%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 0%,#000 0%,transparent 70%);
}
body>*{position:relative;z-index:1}
a{color:inherit}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent-2);outline-offset:3px}
.container{width:100%;max-width:1200px;margin:0 auto;padding-inline:16px}
@media (min-width:640px){.container{padding-inline:24px}}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;height:var(--nav-h);border-bottom:1px solid var(--line);
  background:rgba(7,9,15,.72);backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%)}
.nav .container{height:100%;display:flex;align-items:center;gap:16px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:18px;letter-spacing:-.01em;font-stretch:112%}
.brand svg,.brand img{width:30px;height:30px;flex:none}
.brand b{color:var(--accent-2);font-weight:800}
.nav .back{display:inline-flex;align-items:center;gap:6px;color:var(--muted);text-decoration:none;font-size:14px;font-weight:600;padding:8px 12px;border-radius:999px;border:1px solid transparent}
.nav .back:hover{color:var(--fg);border-color:var(--line-2)}
.nav .spacer{flex:1}
.lang{display:inline-flex;padding:3px;border-radius:999px;background:var(--card);border:1px solid var(--line)}
.lang button{border:0;background:transparent;color:var(--muted);font-weight:700;font-size:13px;letter-spacing:.06em;padding:6px 12px;border-radius:999px;cursor:pointer;transition:background .2s,color .2s}
.lang button[aria-pressed="true"]{background:var(--fg);color:#0b0d14}
.lang button:not([aria-pressed="true"]):hover{color:var(--fg)}
@media (max-width:480px){.brand span{display:none}.nav .back .lbl{display:none}}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:0;border-radius:999px;padding:15px 26px;
  font:800 14px var(--font);letter-spacing:.1em;text-transform:uppercase;text-decoration:none;cursor:pointer;
  background:var(--fg);color:#0b0d14;transition:transform .15s ease,box-shadow .2s ease,background .2s}
.btn:hover{transform:translateY(-1px);box-shadow:0 10px 30px -10px rgba(143,156,255,.6)}
.btn:active{transform:translateY(0)}
.btn.primary{background:linear-gradient(135deg,var(--accent),#7a5bff);color:#fff}
.btn.ghost{background:transparent;color:var(--fg);border:1px solid var(--line-2)}
.btn.ghost:hover{background:rgba(255,255,255,.04);box-shadow:none}
.btn svg{width:18px;height:18px}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);margin-top:80px;padding:28px 0 40px;color:var(--dim);font-size:14px}
.foot .container{display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}html{scroll-behavior:auto}}