:root{
  --bg:#06070f;
  --bg-soft:#0d1020;
  --panel:#11152a;
  --line:#1e2440;
  --txt:#e8ecff;
  --dim:#7a84ad;
  --beam:#38e8ff;
  --gold:#ffc95c;
  --accent:#b06bff;
  --ok:#54e08b;
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{
  background:
    radial-gradient(1000px 620px at 50% -12%, #16203f 0%, transparent 62%),
    var(--bg);
  color:var(--txt);
  font:500 16px/1.5 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Inter,Roboto,sans-serif;
  display:flex;flex-direction:column;align-items:center;
  min-height:100dvh;
  overflow-x:hidden;
  padding:env(safe-area-inset-top) 0 env(safe-area-inset-bottom);
}

/* ─── ad slots ─── */
.ad-slot{
  width:100%;max-width:728px;margin:8px auto;
  min-height:56px;display:flex;align-items:center;justify-content:center;
  border:1px dashed var(--line);border-radius:10px;
  background:rgba(255,255,255,.012);
  flex:0 0 auto;
}
.ad-top{min-height:60px}
.ad-bottom{min-height:90px;margin-bottom:14px}
.ad-modal{min-height:100px;margin:14px 0}
.ad-label{font-size:9px;letter-spacing:.22em;text-transform:uppercase;color:#39405e}

/* ─── header ─── */
.topbar{
  width:100%;max-width:560px;padding:4px 16px 10px;
  display:grid;grid-template-columns:44px 1fr auto;align-items:center;gap:8px;
}
.brand{text-align:center}
.brand h1{
  font-size:26px;font-weight:800;letter-spacing:.34em;text-indent:.34em;
  background:linear-gradient(92deg,var(--beam),#9fe8ff 42%,var(--accent));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.brand .sub{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim);margin-top:2px}
.topbar-right{display:flex;gap:6px}
.icon-btn{
  width:38px;height:38px;border-radius:10px;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  color:var(--dim);font-size:16px;cursor:pointer;transition:.15s;
}
.icon-btn:hover{color:var(--txt);border-color:#2e3762;background:rgba(255,255,255,.07)}
.icon-btn.off{opacity:.38}

main{width:100%;max-width:560px;padding:0 16px;flex:1 1 auto;display:flex;flex-direction:column}

/* ─── hud ─── */
.hud{
  display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:14px;
}
.hud-cell{
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.015));
  border:1px solid var(--line);border-radius:12px;
  padding:9px 4px;text-align:center;
}
.hud-val{display:block;font-size:21px;font-weight:800;font-variant-numeric:tabular-nums;line-height:1.1}
.hud-key{display:block;font-size:9px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim);margin-top:3px}
#hud-streak{color:var(--gold)}
.hud-val.good{color:var(--ok)}

/* ─── board ─── */
.board-wrap{position:relative;width:100%;aspect-ratio:1/1;max-height:62vh;margin:0 auto}
canvas{
  width:100%;height:100%;display:block;border-radius:18px;
  background:linear-gradient(180deg,#0a0d1c,#070911);
  border:1px solid var(--line);
  box-shadow:0 18px 60px -22px #000, inset 0 1px 0 rgba(255,255,255,.04);
  touch-action:manipulation;cursor:pointer;
}
.board-toast{
  position:absolute;left:50%;bottom:14px;transform:translate(-50%,10px);
  background:rgba(8,10,22,.92);border:1px solid var(--line);
  padding:7px 15px;border-radius:99px;font-size:13px;color:var(--dim);
  opacity:0;pointer-events:none;transition:.25s;white-space:nowrap;
}
.board-toast.show{opacity:1;transform:translate(-50%,0)}

/* ─── controls ─── */
.controls{display:flex;gap:10px;margin:16px 0 4px}
.btn{
  flex:1;padding:13px 16px;border-radius:12px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);
  color:var(--txt);font:inherit;font-weight:700;font-size:14px;cursor:pointer;transition:.15s;
}
.btn:hover{background:rgba(255,255,255,.09);border-color:#2e3762}
.btn:active{transform:scale(.985)}
.btn-primary{
  background:linear-gradient(180deg,#31d8ff,#189fd0);
  border-color:#4fe4ff;color:#03202c;
  box-shadow:0 8px 26px -10px #38e8ff88;
}
.btn-primary:hover{background:linear-gradient(180deg,#5ae4ff,#23b1e4)}
.btn-ghost{background:transparent;color:var(--dim)}
.btn-wide{width:100%;flex:none;margin-top:9px}

.footer{
  width:100%;max-width:560px;padding:10px 16px 24px;
  font-size:11px;color:#39405e;text-align:center;
}
.footer span{color:var(--dim);font-weight:700;letter-spacing:.1em}

/* ─── modals ─── */
.modal-back{
  position:fixed;inset:0;z-index:50;
  background:rgba(3,4,10,.76);backdrop-filter:blur(7px);
  display:flex;align-items:center;justify-content:center;padding:18px;
  animation:fade .2s ease;
}
.modal-back[hidden]{display:none}
@keyframes fade{from{opacity:0}}
.modal{
  position:relative;width:100%;max-width:400px;max-height:90dvh;overflow-y:auto;
  background:linear-gradient(180deg,#151a32,#0c0f1f);
  border:1px solid #262e52;border-radius:20px;padding:26px 22px 22px;
  box-shadow:0 30px 80px -20px #000;
  animation:pop .26s cubic-bezier(.2,1.2,.3,1);
}
@keyframes pop{from{opacity:0;transform:translateY(14px) scale(.96)}}
.modal h2{font-size:21px;font-weight:800;text-align:center;letter-spacing:.02em}
.modal h3{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim);font-weight:700}
.modal-x{
  position:absolute;top:12px;right:12px;width:30px;height:30px;
  border:0;background:transparent;color:var(--dim);font-size:22px;cursor:pointer;line-height:1;
}
.modal-x:hover{color:var(--txt)}
.win-line{text-align:center;color:var(--dim);font-size:14px;margin-top:7px}
.win-line b{color:var(--txt)}
.win-burst{
  height:3px;width:74px;margin:14px auto 4px;border-radius:99px;
  background:linear-gradient(90deg,transparent,var(--beam),var(--accent),transparent);
  box-shadow:0 0 22px var(--beam);
}

.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;margin:18px 0 4px}
.stat{text-align:center}
.stat .v{display:block;font-size:22px;font-weight:800;font-variant-numeric:tabular-nums}
.stat .k{display:block;font-size:9px;letter-spacing:.11em;text-transform:uppercase;color:var(--dim);margin-top:3px;line-height:1.3}

.dist-title{margin:20px 0 9px}
.dist{display:flex;flex-direction:column;gap:5px}
.dist-row{display:grid;grid-template-columns:34px 1fr;align-items:center;gap:8px;font-size:12px}
.dist-row .lbl{color:var(--dim);text-align:right;font-variant-numeric:tabular-nums}
.dist-row .bar{
  background:#232a4a;border-radius:5px;height:21px;min-width:22px;
  display:flex;align-items:center;justify-content:flex-end;
  padding:0 7px;font-size:11px;font-weight:700;transition:width .4s;
}
.dist-row .bar.hi{background:linear-gradient(90deg,#189fd0,var(--beam));color:#03202c}

.help-list{margin:16px 0 0;padding-left:19px;display:flex;flex-direction:column;gap:11px;font-size:14px;color:#c3cbe8}
.help-list b{color:var(--txt)}
.help-list code{
  background:#222a4c;padding:1px 6px;border-radius:5px;
  font-family:ui-monospace,Menlo,monospace;color:var(--beam);font-size:13px;
}
.crystal-inline,.wall-inline{display:inline-block;width:11px;height:11px;border-radius:3px;vertical-align:-1px;margin:0 1px}
.crystal-inline{background:var(--gold);box-shadow:0 0 9px var(--gold);transform:rotate(45deg);border-radius:2px}
.wall-inline{background:#2a3152;border:1px solid #3a4470}
.help-foot{margin-top:17px;font-size:12px;color:var(--dim);text-align:center}
.countdown{text-align:center;font-size:12px;color:var(--dim);margin-top:15px}
.countdown b{color:var(--txt);font-variant-numeric:tabular-nums;letter-spacing:.04em}

@media(max-width:400px){
  .brand h1{font-size:22px}
  .hud-val{font-size:18px}
  .board-wrap{max-height:56vh}
}
@media(min-height:900px){
  .board-wrap{max-height:none}
}

/* ─────────────── campaign: hint button, win stars, level map ─────────────── */

#btn-hint b{color:var(--gold);font-variant-numeric:tabular-nums}
#btn-hint:disabled{opacity:.4;cursor:default}

/* win-screen stars */
.win-stars{display:flex;justify-content:center;gap:7px;margin:6px 0 2px;font-size:34px;line-height:1}
.win-stars span{color:#2a3152;transform:scale(.82);transition:none}
.win-stars span.on{
  color:var(--gold);
  text-shadow:0 0 16px var(--gold);
  animation:starpop .45s cubic-bezier(.2,1.5,.4,1) both;
}
.win-stars span.on:nth-child(2){animation-delay:.10s}
.win-stars span.on:nth-child(3){animation-delay:.20s}
.win-stars span.on:nth-child(4){animation-delay:.30s}
.win-stars span.on:nth-child(5){animation-delay:.40s}
@keyframes starpop{0%{transform:scale(0) rotate(-40deg);opacity:0}60%{transform:scale(1.25) rotate(6deg)}100%{transform:scale(1) rotate(0);opacity:1}}

.record-badge{
  text-align:center;margin:10px auto 0;width:max-content;
  background:linear-gradient(180deg,#3a2f10,#2a2410);border:1px solid #6b5320;
  color:var(--gold);font-weight:800;font-size:13px;padding:6px 14px;border-radius:99px;
  animation:pop .4s both;
}
.unlock-note{
  text-align:center;margin:12px 0 2px;padding:11px;border-radius:12px;
  background:linear-gradient(180deg,rgba(176,107,255,.16),rgba(176,107,255,.05));
  border:1px solid #4a3a72;color:#d9c9ff;font-size:13px;font-weight:600;
}
.unlock-note b{color:#fff}

/* level-select modal */
.modal-lg{max-width:460px}
.map-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;padding-right:24px}
.map-head h2{text-align:left}
.map-stars{font-size:16px;font-weight:800;color:var(--txt);font-variant-numeric:tabular-nums;display:flex;align-items:center;gap:5px}
.map-stars .star-lg{color:var(--gold);text-shadow:0 0 10px var(--gold)}
.map-stars .map-max{color:var(--dim);font-weight:600;font-size:13px}

.daily-card{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:14px 16px;margin-bottom:18px;cursor:pointer;
  background:linear-gradient(100deg,rgba(56,232,255,.14),rgba(176,107,255,.10));
  border:1px solid #2f6d86;border-radius:14px;color:var(--txt);font:inherit;text-align:left;
  transition:.15s;
}
.daily-card:hover{border-color:var(--beam);transform:translateY(-1px)}
.dc-title{font-weight:800;font-size:15px;letter-spacing:.02em}
.dc-sub{font-size:12px;color:var(--dim);margin-top:2px}
.dc-go{color:var(--beam);font-weight:700;font-size:14px;white-space:nowrap}

.cat-section{margin-bottom:20px}
.cat-head{display:flex;align-items:center;gap:9px;margin-bottom:10px}
.cat-dot{width:11px;height:11px;border-radius:3px;transform:rotate(45deg);flex:0 0 auto;box-shadow:0 0 10px currentColor}
.cat-name{font-weight:800;font-size:14px;letter-spacing:.04em}
.cat-blurb{font-size:11px;color:var(--dim);font-weight:500}
.cat-stars{margin-left:auto;font-size:12px;font-weight:700;color:var(--gold);font-variant-numeric:tabular-nums;white-space:nowrap}
.cat-stars.locked{color:var(--dim)}
.cat-section.locked .cat-name{color:var(--dim)}

.lvl-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}
.lvl{
  position:relative;aspect-ratio:1/1;border-radius:11px;cursor:pointer;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  border:1px solid var(--line);background:rgba(255,255,255,.035);
  color:var(--txt);font-weight:800;font-size:16px;font-variant-numeric:tabular-nums;
  transition:.13s;
}
.lvl:hover:not(.locked){transform:translateY(-2px);border-color:#3a4680;background:rgba(255,255,255,.08)}
.lvl.done{background:linear-gradient(180deg,rgba(56,232,255,.12),rgba(56,232,255,.03));border-color:#2c5a72}
.lvl.current{border-color:var(--beam);box-shadow:0 0 0 1px var(--beam),0 0 18px -4px var(--beam)}
.lvl.current::after{content:'';position:absolute;inset:0;border-radius:11px;animation:currentpulse 1.8s ease-in-out infinite;pointer-events:none}
@keyframes currentpulse{0%,100%{box-shadow:0 0 0 0 rgba(56,232,255,.0)}50%{box-shadow:0 0 14px 2px rgba(56,232,255,.35)}}
.lvl.locked{cursor:default;color:#39405e;background:rgba(255,255,255,.012);border-style:dashed}
.lvl .lock{font-size:15px;opacity:.5}
.lvl-stars{display:flex;gap:1px;font-size:8px;line-height:1;height:9px}
.lvl-stars .s{color:#2a3152}
.lvl-stars .s.on{color:var(--gold)}

@media(max-width:400px){
  .lvl{font-size:14px;border-radius:9px}
  .lvl-grid{gap:6px}
  .controls .btn{font-size:13px;padding:12px 8px}
}
.star-txt{color:var(--gold);letter-spacing:1px}

/* ─────────── chapter intro + rewarded ad ─────────── */
.chapter-modal{text-align:center}
.chapter-eyebrow{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--dim);margin-top:6px}
.chapter-name{font-size:32px;font-weight:800;letter-spacing:.06em;margin:6px 0 2px;text-shadow:0 0 24px currentColor}
.chapter-blurb{color:var(--dim);font-size:14px;margin-bottom:14px}
.chapter-hints{font-size:13px;color:#c3cbe8;margin-bottom:18px}
.chapter-hints b{color:var(--gold)}

/* rewarded-ad placeholder overlay (dev/no-network; real network plugs into ads.js) */
#prism-rewarded{
  position:fixed;inset:0;z-index:90;display:none;align-items:center;justify-content:center;
  background:rgba(3,4,10,.94);backdrop-filter:blur(4px);
}
#prism-rewarded .rw-inner{
  width:min(86vw,340px);aspect-ratio:3/4;max-height:70vh;border-radius:18px;
  border:1px dashed var(--line);background:linear-gradient(180deg,#11152a,#0a0d1c);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
}
#prism-rewarded .rw-label{font-size:9px;letter-spacing:.24em;text-transform:uppercase;color:#39405e}
#prism-rewarded .rw-count{font-size:54px;font-weight:800;color:var(--beam);text-shadow:0 0 26px var(--beam);font-variant-numeric:tabular-nums}
#prism-rewarded .rw-sub{font-size:12px;color:var(--dim)}
#prism-rewarded .rw-sub b{color:var(--txt)}

/* prism/splitter swatch in the how-to list */
.split-inline{display:inline-block;width:11px;height:11px;border-radius:3px;vertical-align:-1px;margin:0 1px;
  background:linear-gradient(135deg,#c696ff,#785adc);box-shadow:0 0 9px #b06bff;transform:rotate(45deg)}