:root{
  --sky-top:#7B5CFF;
  --sky-bot:#2E1E6B;
  --ink:#1A1235;
  --pop-purple:#7B5CFF;
  --pop-purple-dark:#5636CC;
  --pop-coral:#FF5D73;
  --pop-coral-dark:#D63A50;
  --pop-teal:#1FCFC0;
  --pop-teal-dark:#12A398;
  --gold:#FFC93C;
  --gold-dark:#D89A12;
  --cream:#FFF8EC;
  --panel:#FFFFFF;
  --muted:#5C577A;
}
*{box-sizing:border-box; -webkit-tap-highlight-color:transparent;}
html,body{
  margin:0;
  min-height:100%;
  background:
    radial-gradient(circle at 1px 1px, rgba(26,18,53,0.07) 1.4px, transparent 2px) 0 0/16px 16px,
    var(--cream);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
}
a{color:var(--pop-purple-dark);}
.wrap{max-width:1080px; margin:0 auto; padding:0 20px;}

/* ---- nav ---- */
.nav{
  display:flex; align-items:center; justify-content:space-between;
  gap:12px;
  padding:14px 20px;
  background:var(--panel);
  border-bottom:3px solid var(--ink);
  position:sticky; top:0; z-index:10;
}
.brand{
  font-family:"Arial Black","Segoe UI Black",Impact,sans-serif;
  font-weight:900;
  letter-spacing:.01em;
  font-size:20px;
  color:var(--pop-coral);
  -webkit-text-stroke:1.2px var(--ink);
  text-decoration:none;
  display:flex; align-items:center; gap:8px;
}
.brand .dot{color:var(--pop-purple-dark); -webkit-text-stroke:0;}
.nav-right{display:flex; align-items:center; gap:10px;}

/* ---- buttons ---- */
.btn{
  font-family:inherit;
  font-weight:800;
  text-transform:uppercase;
  letter-spacing:.03em;
  font-size:14px;
  color:#fff;
  background:var(--pop-purple);
  border:3px solid var(--ink);
  border-radius:10px;
  padding:11px 20px;
  cursor:pointer;
  box-shadow:4px 4px 0 var(--ink);
  transform:skewX(-4deg);
  transition:transform .08s, box-shadow .08s, filter .08s;
  text-decoration:none;
  display:inline-block;
}
.btn > span{display:inline-block; transform:skewX(4deg);}
.btn:hover{filter:brightness(1.07);}
.btn:active{transform:skewX(-4deg) translate(3px,3px); box-shadow:0 0 0 var(--ink);}
.btn:focus-visible{outline:3px solid var(--gold); outline-offset:2px;}
.btn.coral{background:var(--pop-coral);}
.btn.teal{background:var(--pop-teal); color:var(--ink);}
.btn.gold{background:var(--gold-dark); color:var(--ink);}
.btn.ghost{background:var(--panel); color:var(--ink);}
.btn.small{padding:8px 15px; font-size:12px;}
.btn:disabled{opacity:.45; cursor:not-allowed; filter:none;}

/* ---- hero ---- */
.hero{
  padding:clamp(32px,6vw,58px) 0 clamp(18px,3vw,30px);
  text-align:center;
  position:relative;
  overflow:hidden;
}
.hero-burst{
  position:absolute; inset:0; z-index:-1;
  background:
    radial-gradient(circle at 50% -10%, rgba(123,92,255,0.28), transparent 60%),
    radial-gradient(circle at 90% 10%, rgba(31,207,192,0.22), transparent 55%),
    radial-gradient(circle at 5% 20%, rgba(255,93,115,0.20), transparent 55%);
}
.title{
  font-family:"Arial Black","Segoe UI Black",Impact,"Microsoft JhengHei","PingFang HK","Noto Sans TC",sans-serif;
  font-weight:900;
  line-height:0.98;
  color:var(--pop-coral);
  -webkit-text-stroke:2.5px var(--ink);
  text-shadow:4px 4px 0 var(--ink);
  text-wrap:balance;
  margin:0 0 10px;
  font-size:clamp(38px,7.5vw,66px);
}
.title .accent{color:var(--pop-teal);}
.tagline{color:var(--muted); font-weight:700; font-size:clamp(14px,2vw,17px); margin:0 0 26px;}

/* ---- game grid ---- */
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:22px;
  padding:20px 0 70px;
}
.card{
  border:3px solid var(--ink);
  border-radius:20px;
  background:var(--panel);
  box-shadow:6px 6px 0 rgba(26,18,53,0.18);
  padding:0;
  display:flex; flex-direction:column;
  overflow:hidden;
  transition:transform .12s, box-shadow .12s;
  text-decoration:none;
  color:var(--ink);
}
.card:hover{transform:translate(-3px,-3px); box-shadow:9px 9px 0 rgba(26,18,53,0.18);}
.card-cover{
  width:100%; aspect-ratio:16/10; object-fit:cover;
  border-bottom:3px solid var(--ink);
  display:block;
}
.card-body{padding:20px 20px 24px; display:flex; flex-direction:column; gap:10px; flex:1;}
.card h3{margin:0; font-size:22px; font-weight:900; letter-spacing:.01em;}
.card p{margin:0; color:var(--muted); font-size:14px; flex:1; line-height:1.5;}
.card .tag-row{display:flex; gap:6px; flex-wrap:wrap;}
.tag{
  font-size:10.5px; font-weight:800; letter-spacing:.04em; text-transform:uppercase;
  background:var(--cream); border:1.5px solid var(--ink); color:var(--ink);
  padding:3px 10px; border-radius:20px;
}
.card .soon-badge{
  align-self:flex-start;
  font-size:10.5px; font-weight:800; letter-spacing:.05em; text-transform:uppercase;
  background:var(--ink); color:var(--gold);
  padding:4px 11px; border-radius:20px;
}
.card .play-cta{
  margin-top:6px;
  font-weight:800; font-size:13.5px; color:var(--pop-purple-dark);
  display:flex; align-items:center; gap:6px;
}
.card .play-cta .arrow{transition:transform .12s;}
.card:hover .play-cta .arrow{transform:translateX(4px);}

/* ---- footer ---- */
.footer{
  text-align:center; padding:26px 0 40px;
  color:var(--muted); font-size:12.5px; font-weight:600;
}

/* ---- game toolbar / hud / result overlay (shared by all games) ---- */
.toolbar{
  display:flex; flex-wrap:wrap; align-items:center; justify-content:center;
  gap:8px; margin:0 0 10px;
}
.seg{
  display:flex; border:3px solid var(--ink); border-radius:12px; overflow:hidden;
  box-shadow:3px 3px 0 rgba(26,18,53,0.18);
}
.seg button{
  font-family:inherit; font-weight:800; font-size:12.5px; letter-spacing:.02em;
  text-transform:uppercase; border:none; background:var(--panel); color:var(--ink);
  padding:9px 14px; cursor:pointer; transition:background .1s, color .1s;
}
.seg button + button{border-left:3px solid var(--ink);}
.seg button.active{background:var(--pop-purple); color:#fff;}
.seg button.active.diff-easy{background:var(--pop-teal); color:var(--ink);}
.seg button.active.diff-hard{background:var(--pop-coral);}

.icon-btn{
  font-family:inherit; font-weight:800; font-size:12.5px; letter-spacing:.02em;
  text-transform:uppercase; display:flex; align-items:center; gap:6px;
  border:3px solid var(--ink); border-radius:12px; background:var(--gold);
  color:var(--ink); padding:9px 16px; cursor:pointer;
  box-shadow:3px 3px 0 rgba(26,18,53,0.18);
}
.icon-btn:active{transform:translate(2px,2px); box-shadow:1px 1px 0 rgba(26,18,53,0.18);}
.icon-btn:disabled{opacity:.45; cursor:not-allowed;}

.hud{
  display:flex; justify-content:center; gap:22px; margin-bottom:8px;
  font-weight:800; font-size:14px; color:var(--ink);
}
.hud .chip{
  display:flex; align-items:center; gap:6px;
  background:var(--panel); border:2px solid var(--ink); border-radius:20px;
  padding:6px 14px; font-variant-numeric:tabular-nums;
}
.hint{
  text-align:center; color:var(--muted); font-weight:600; font-size:13px; margin:0 0 10px;
}

@media (orientation: landscape){
  .toolbar{margin-bottom:10px;}
  .hud{margin-bottom:8px;}
  .hint{margin:0 0 10px;}
}

.win-overlay{
  position:fixed; inset:0; z-index:50;
  background:rgba(26,18,53,0.55);
  display:flex; align-items:center; justify-content:center;
  padding:20px;
}
.win-overlay[hidden]{display:none;}
.win-card{
  background:var(--panel); border:3px solid var(--ink); border-radius:20px;
  box-shadow:8px 8px 0 rgba(26,18,53,0.25);
  padding:30px 28px; text-align:center; max-width:340px; width:100%;
}
.win-card .big{font-size:46px; margin-bottom:4px;}
.win-card h2{margin:0 0 6px; font-size:24px; font-weight:900;}
.win-card p{margin:0 0 18px; color:var(--muted); font-weight:700; font-size:14px;}
.win-actions{display:flex; flex-direction:column; gap:10px;}

.welcome-card{
  max-width:500px;
  padding:20px;
}
.welcome-art{
  display:block;
  width:100%;
  border:3px solid var(--ink);
  border-radius:14px;
  margin-bottom:18px;
}
.welcome-card .btn{width:100%;}

/* ---- auth pages ---- */
.auth-wrap{max-width:400px; margin:50px auto 60px; padding:0 20px;}
.panel{
  background:var(--panel); border:3px solid var(--ink); border-radius:20px;
  padding:28px 26px; box-shadow:6px 6px 0 rgba(26,18,53,0.18);
}
.panel h2{margin:0 0 6px; font-size:22px; font-weight:900;}
.panel .sub{margin:0 0 20px; color:var(--muted); font-weight:600; font-size:13.5px;}
.field{margin-bottom:16px;}
.field label{display:block; font-weight:800; font-size:12.5px; margin-bottom:6px; color:var(--ink);}
.field input{
  width:100%; padding:11px 13px; font-family:inherit; font-size:15px;
  border:2.5px solid var(--ink); border-radius:10px; background:var(--cream);
}
.field input:focus-visible{outline:3px solid var(--gold); outline-offset:1px;}
.flash{
  background:#FFE3E8; border:2px solid var(--pop-coral-dark); color:var(--pop-coral-dark);
  font-weight:700; font-size:13px; padding:10px 14px; border-radius:10px; margin-bottom:16px;
}
.switch-line{text-align:center; margin-top:16px; font-size:13.5px; color:var(--muted); font-weight:600;}
.panel .btn{width:100%; text-align:center;}

/* ---- nav auth/points chip ---- */
.points-chip{
  display:flex; align-items:center; gap:5px;
  background:var(--cream); border:2px solid var(--ink); border-radius:20px;
  padding:5px 12px; font-weight:800; font-size:13px; color:var(--ink);
  text-decoration:none; font-variant-numeric:tabular-nums;
}
.nav-link{font-weight:800; font-size:13.5px; color:var(--ink); text-decoration:none;}

/* ---- leaderboard ---- */
.lb-table{width:100%; border-collapse:collapse; margin-top:10px;}
.lb-table th, .lb-table td{
  text-align:left; padding:10px 12px; border-bottom:2px solid rgba(26,18,53,0.1);
  font-size:14px;
}
.lb-table th{font-size:11px; text-transform:uppercase; letter-spacing:.04em; color:var(--muted);}
.lb-table td.num{font-variant-numeric:tabular-nums; font-weight:800;}
.lb-table tr.me{background:rgba(123,92,255,0.10);}
.lb-medal{font-size:16px;}