:root{
  --bg:#05060d; --bg2:#0a0e1c; --cyan:#23f0ff; --mag:#ff2bd6; --lime:#b6ff3c;
  --amber:#ffb347; --red:#ff3b5c; --ink:#dff6ff; --dim:#5a6b86;
  --glow:0 0 12px var(--cyan);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  background:radial-gradient(1200px 800px at 50% -10%, #11203f 0%, var(--bg2) 45%, var(--bg) 100%);
  color:var(--ink); font-family:"Segoe UI",system-ui,sans-serif;
  overflow:hidden; user-select:none; -webkit-user-select:none;
}
#app{position:relative;width:100vw;height:100vh;display:flex;align-items:center;justify-content:center}
.screen{position:absolute;inset:0;display:none;flex-direction:column;align-items:center;justify-content:center;gap:18px}
.screen.active{display:flex;animation:fade .35s ease}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ---- branding ---- */
.logo{font-weight:900;letter-spacing:.32em;font-size:clamp(48px,11vw,120px);
  background:linear-gradient(120deg,var(--cyan),var(--mag));-webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 22px rgba(35,240,255,.55));text-shadow:none;position:relative}
.logo::after{content:"VOLT";position:absolute;left:0;top:0;color:var(--mag);opacity:.35;
  transform:translate(3px,2px);filter:blur(1px);z-index:-1;animation:glitch 3.5s infinite}
@keyframes glitch{0%,92%,100%{transform:translate(3px,2px)}93%{transform:translate(-4px,-2px)}96%{transform:translate(5px,1px)}}
.tag{color:var(--dim);letter-spacing:.32em;text-transform:uppercase;font-size:13px}
#logoImg{width:min(440px,72vw);max-height:42vh;object-fit:contain;cursor:pointer;
  filter:drop-shadow(0 0 30px rgba(123,255,60,.35));transition:transform .12s;-webkit-user-drag:none}
#logoImg:active{transform:scale(.97)}
.logo2{font-weight:900;letter-spacing:.18em;font-size:clamp(26px,5vw,40px);
  color:var(--lime);text-shadow:0 0 22px rgba(182,255,60,.45)}

/* ---- buttons ---- */
.btn{cursor:pointer;border:1px solid var(--cyan);background:rgba(35,240,255,.06);color:var(--ink);
  padding:13px 26px;border-radius:10px;letter-spacing:.16em;text-transform:uppercase;font-size:14px;font-weight:700;
  transition:.15s;box-shadow:0 0 0 rgba(35,240,255,0)}
.btn:hover{background:rgba(35,240,255,.18);box-shadow:0 0 18px rgba(35,240,255,.4);transform:translateY(-2px)}
.btn.green{border-color:var(--lime);background:rgba(182,255,60,.08);color:#eaffd6}
.btn.green:hover{background:rgba(182,255,60,.2);box-shadow:0 0 18px rgba(182,255,60,.45)}
.btn.sm{padding:8px 16px;font-size:12px}
.row{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}
.hint{color:var(--dim);font-size:13px;max-width:520px;text-align:center;line-height:1.6}
.hint b{color:var(--cyan)}

/* ---- how-to-play legend ---- */
.howlede{max-width:680px;text-align:center;color:#b9c6da;line-height:1.6;font-size:15px}
.howlede b{color:var(--lime)}
#howScroll{max-height:62vh;overflow-y:auto;max-width:720px;padding:4px 14px 4px 4px}
.howsec{color:var(--cyan);letter-spacing:.22em;font-size:12px;font-weight:800;
  margin:16px 0 8px;border-bottom:1px solid #18243c;padding-bottom:5px}
.legend{display:grid;grid-template-columns:1fr 1fr;gap:8px}
@media (max-width:680px){.legend{grid-template-columns:1fr}}
.li{display:flex;gap:11px;align-items:flex-start;background:rgba(20,30,55,.4);
  border:1px solid #18243c;border-radius:10px;padding:9px 11px}
.li .ic{flex:0 0 30px;width:30px;height:30px;border-radius:7px;background:#0e1a2e;
  display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;
  color:#cfe0ff;text-shadow:0 0 8px currentColor}
.li div{font-size:12.5px;line-height:1.45;color:#aebbd0}
.li div b{color:#eaf2ff}
.howfoot{color:#3a4a63;font-size:12px;text-align:center;margin:14px 0 4px;font-style:italic}

/* ---- level select ---- */
#levelGrid{display:grid;grid-template-columns:repeat(8,1fr);gap:12px;max-width:760px;
  max-height:62vh;overflow-y:auto;padding:8px}
.cell{position:relative;width:72px;height:72px;border-radius:12px;border:1px solid #21304d;
  background:rgba(20,30,55,.6);display:flex;flex-direction:column;align-items:center;justify-content:center;
  cursor:pointer;transition:.14s}
.cell:hover{transform:translateY(-3px);border-color:var(--cyan);box-shadow:0 0 16px rgba(35,240,255,.35)}
.cell .num{font-weight:800;font-size:20px}
.cell .nm{font-size:8px;color:var(--dim);letter-spacing:.04em;max-width:66px;text-align:center;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.cell .st{font-size:11px;letter-spacing:1px;height:12px}
.cell.locked{opacity:.32;cursor:not-allowed}
.cell.locked:hover{transform:none;border-color:#21304d;box-shadow:none}
.cell.done{border-color:rgba(182,255,60,.5)}
.cell .tierbar{position:absolute;top:0;left:0;right:0;height:3px;border-radius:12px 12px 0 0}
.star{color:var(--amber)}
.star.off{color:#26334d}

/* ---- HUD ---- */
#hud{position:absolute;top:0;left:0;right:0;display:flex;justify-content:space-between;align-items:center;
  padding:14px 22px;font-size:14px;letter-spacing:.08em;z-index:5;pointer-events:none}
#hud .pill{background:rgba(10,16,32,.7);border:1px solid #21304d;border-radius:30px;padding:7px 16px;
  display:flex;gap:8px;align-items:center;backdrop-filter:blur(4px);pointer-events:auto}
#hud .pill b{color:var(--cyan);font-weight:800}
#combo{position:absolute;left:50%;top:78px;transform:translateX(-50%);font-weight:900;font-size:34px;
  color:var(--lime);opacity:0;letter-spacing:.05em;text-shadow:0 0 18px rgba(182,255,60,.7);pointer-events:none;z-index:6}
#runHud{position:absolute;left:50%;top:54px;transform:translateX(-50%);z-index:5;display:none;
  background:rgba(8,16,10,.7);border:1px solid var(--lime);border-radius:30px;padding:6px 18px;
  font-weight:800;letter-spacing:.06em;font-size:14px;color:#eaffd6;backdrop-filter:blur(4px)}
#toast{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-weight:900;
  font-size:clamp(28px,5vw,52px);opacity:0;pointer-events:none;z-index:7;text-align:center}
canvas{border-radius:14px;box-shadow:0 0 60px rgba(0,0,0,.6), inset 0 0 0 1px rgba(35,240,255,.12);
  max-width:96vw;max-height:64vh;height:auto}

/* ---- phone / small-screen fit ---- */
@media (max-width:560px){
  #hud{padding:8px 10px;font-size:11px;gap:6px}
  #hud .pill{padding:5px 9px}
  .btn.sm{padding:6px 10px;font-size:11px}
  .logo2{font-size:24px}
  #levelGrid{grid-template-columns:repeat(6,1fr)!important}
  .cell{width:54px;height:54px}
  #setWrap{min-width:88vw}
  #mineList{min-width:88vw}
}
@media (max-height:560px){ canvas{max-height:74vh} #hud{font-size:11px} }
/* keep clear of notches / system bars */
#hud{padding-top:calc(14px + env(safe-area-inset-top))}
#dpad{bottom:calc(90px + env(safe-area-inset-bottom))}

/* ---- complete overlay ---- */
#complete{position:absolute;inset:0;display:none;flex-direction:column;align-items:center;justify-content:center;
  gap:16px;background:rgba(5,6,13,.82);backdrop-filter:blur(6px);z-index:9}
#complete.active{display:flex;animation:fade .3s}
#complete .stars{font-size:64px;letter-spacing:14px}
#complete h2{font-size:42px;letter-spacing:.1em;color:var(--lime);text-shadow:0 0 24px rgba(182,255,60,.6)}
#complete .stat{color:var(--dim);font-size:15px}
#topbar{position:absolute;top:0;left:0;right:0;padding:10px;display:flex;justify-content:center;gap:10px;z-index:8}
.miniback{position:absolute;top:14px;left:18px;z-index:8}
.foot{position:absolute;bottom:14px;color:var(--dim);font-size:12px;letter-spacing:.1em}
::-webkit-scrollbar{width:8px}::-webkit-scrollbar-thumb{background:#21304d;border-radius:8px}

/* ---- pager ---- */
#pager{display:flex;gap:8px;align-items:center;font-size:13px;color:var(--dim)}
#pager input{width:64px;background:#0a1322;border:1px solid #21304d;color:var(--ink);
  border-radius:8px;padding:7px 8px;font-size:13px}
#pgInfo{min-width:70px;text-align:center;letter-spacing:.05em}

/* ---- editor ---- */
#edWrap{display:flex;gap:14px;align-items:flex-start}
#edPalette{display:grid;grid-template-columns:1fr;gap:6px;max-height:60vh;overflow-y:auto}
.tool{display:flex;align-items:center;gap:8px;cursor:pointer;border:1px solid #21304d;
  background:rgba(20,30,55,.5);border-radius:8px;padding:6px 10px;font-size:12px;color:var(--ink);white-space:nowrap}
.tool:hover{border-color:var(--lime)}
.tool.sel{border-color:var(--lime);background:rgba(182,255,60,.15);box-shadow:0 0 10px rgba(182,255,60,.3)}
.tool .sw{width:16px;height:16px;border-radius:4px;flex:0 0 auto;display:flex;align-items:center;justify-content:center;font-size:12px}
#edBoard{display:grid;gap:2px;background:#0a1322;padding:8px;border-radius:10px;
  border:1px solid #21304d;box-shadow:0 0 30px rgba(0,0,0,.5)}
.ec{width:30px;height:30px;border-radius:5px;background:#0e1a2e;cursor:pointer;display:flex;
  align-items:center;justify-content:center;font-size:15px;font-weight:700;transition:.05s}
.ec:hover{outline:2px solid rgba(182,255,60,.5)}
#edSize input{width:54px;background:#0a1322;border:1px solid #21304d;color:var(--ink);border-radius:8px;padding:6px}
#edStatus{max-width:620px;text-align:center;min-height:20px}
#edStatus.ok{color:var(--lime)} #edStatus.bad{color:var(--red)}

/* ---- my levels ---- */
#mineList{display:flex;flex-direction:column;gap:8px;max-height:60vh;overflow-y:auto;min-width:380px}
.mine{display:flex;gap:10px;align-items:center;justify-content:space-between;
  border:1px solid #21304d;border-radius:10px;padding:10px 14px;background:rgba(20,30,55,.5)}
.mine .nm{font-weight:700}
.mine .row{gap:6px}

/* ---- toast ---- */
/* ---- cutscene ---- */
#cutscene{position:fixed;inset:0;z-index:45;display:none;flex-direction:column;align-items:center;
  justify-content:center;gap:18px;background:radial-gradient(900px 600px at 50% 30%,#0a1626,#05060d 80%);
  padding:24px}
#cutscene.active{display:flex;animation:fade .5s ease}
.csTitle{font-weight:900;letter-spacing:.3em;font-size:clamp(22px,4vw,34px);color:var(--lime);
  text-shadow:0 0 24px rgba(182,255,60,.5)}
#csArt{font-family:"Consolas","Courier New",monospace;color:var(--cyan);font-size:clamp(11px,1.7vw,16px);
  line-height:1.35;text-shadow:0 0 10px rgba(35,240,255,.4);white-space:pre;margin:0;
  background:rgba(8,16,28,.6);border:1px solid #18314a;border-radius:12px;padding:16px 22px}
#csText{font-family:"Consolas","Courier New",monospace;color:#cfe0ff;font-size:clamp(13px,1.9vw,16px);
  line-height:1.7;white-space:pre-wrap;text-align:center;max-width:680px;min-height:9em}
#cutscene .row{margin-top:4px}

#toast{position:fixed;left:50%;top:18%;transform:translate(-50%,-20px);z-index:50;
  background:rgba(8,16,10,.92);border:1px solid var(--lime);color:#eaffd6;
  padding:14px 26px;border-radius:12px;font-weight:800;letter-spacing:.08em;
  box-shadow:0 0 30px rgba(182,255,60,.4);opacity:0;pointer-events:none;transition:.3s;font-size:18px}
#toast.show{opacity:1;transform:translate(-50%,0)}
.crt #app::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:40;
  background:repeating-linear-gradient(0deg,rgba(0,0,0,.18) 0 1px,transparent 1px 3px)}

/* ---- hint arrow + board wrap ---- */
#boardWrap{position:relative;display:inline-block}
#hintArrow{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-size:64px;
  font-weight:900;color:var(--lime);text-shadow:0 0 24px rgba(182,255,60,.9);opacity:0;pointer-events:none;z-index:6}
#hintArrow.show{animation:hintpop 1s ease}
@keyframes hintpop{0%{opacity:0;transform:translate(-50%,-50%) scale(.4)}25%{opacity:1;transform:translate(-50%,-50%) scale(1.1)}100%{opacity:0;transform:translate(-50%,-50%) scale(1)}}

/* ---- d-pad (touch) ---- */
#dpad{position:absolute;right:20px;bottom:90px;z-index:8;display:none;flex-direction:column;align-items:center;gap:6px;opacity:.85}
#dpad>div{display:flex;gap:6px}
#dpad button{width:54px;height:54px;border-radius:12px;border:1px solid var(--cyan);
  background:rgba(35,240,255,.1);color:var(--ink);font-size:20px;cursor:pointer}
#dpad button:active{background:rgba(35,240,255,.3)}
body.touch #dpad{display:flex}

/* ---- run / time-attack HUD ---- */
#taHud{position:absolute;left:50%;top:54px;transform:translateX(-50%);z-index:5;display:none;
  background:rgba(8,16,10,.7);border:1px solid var(--amber);border-radius:30px;padding:6px 18px;
  font-weight:800;letter-spacing:.06em;font-size:14px;color:#ffe6c2;backdrop-filter:blur(4px)}

/* ---- settings ---- */
#setWrap{display:flex;flex-direction:column;gap:14px;min-width:420px;max-width:520px}
.setrow{display:flex;justify-content:space-between;align-items:center;gap:14px;
  border-bottom:1px solid #18243c;padding-bottom:12px}
.setrow.col{flex-direction:column;align-items:flex-start;gap:8px}
.setrow>span{color:var(--ink);font-size:15px;letter-spacing:.04em}
#skinRow,#rebindRow{display:flex;gap:8px;flex-wrap:wrap}
.skin{width:38px;height:38px;border-radius:50%;cursor:pointer;border:2px solid #21304d;position:relative}
.skin.sel{border-color:#fff;box-shadow:0 0 14px rgba(255,255,255,.5)}
.skin.locked{opacity:.3;cursor:not-allowed}
.skin.locked::after{content:"🔒";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:14px}

/* ---- stats / achievements ---- */
#statGrid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;max-width:600px}
.statcell{background:rgba(20,30,55,.5);border:1px solid #21304d;border-radius:10px;padding:12px 14px;text-align:center;min-width:150px}
.statcell .v{font-size:26px;font-weight:800;color:var(--cyan)}
.statcell .k{font-size:11px;color:var(--dim);letter-spacing:.08em;text-transform:uppercase}
#achGrid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;max-width:640px;max-height:34vh;overflow-y:auto}
.ach{display:flex;gap:10px;align-items:center;border:1px solid #21304d;border-radius:10px;padding:8px 12px;background:rgba(20,30,55,.4)}
.ach.got{border-color:rgba(182,255,60,.5)}
.ach .ico{font-size:22px;filter:grayscale(1);opacity:.4}
.ach.got .ico{filter:none;opacity:1}
.ach .nm{font-weight:700;font-size:13px}
.ach .ds{font-size:11px;color:var(--dim)}