*{margin:0;padding:0;box-sizing:border-box;}
:root{--neon:#36e6ff;--neon2:#ff3df0;--good:#5dff8f;}
html,body{width:100%;height:100%;background:#06080f;overflow:hidden;
  font-family:"Trebuchet MS","Segoe UI",system-ui,sans-serif;color:#eaf6ff;
  -webkit-user-select:none;user-select:none;}
#stage{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;}
#game{display:block;width:100%;height:100%;object-fit:contain;background:#06080f;
  image-rendering:pixelated;}
.hidden{display:none !important;}

#hud{position:absolute;inset:0;pointer-events:none;padding:18px 26px;
  display:flex;justify-content:space-between;align-items:flex-start;
  font-weight:bold;letter-spacing:.5px;text-shadow:0 2px 6px #000;}
.hud-left,.hud-right{display:flex;flex-direction:column;gap:8px;}
.hud-center{flex:1;text-align:center;margin-top:4px;}
.hp-wrap{display:flex;align-items:center;gap:10px;}
.hp-label{font-size:18px;color:var(--neon);}
#hpbar{width:230px;height:22px;background:rgba(0,0,0,.55);border:2px solid rgba(255,255,255,.35);
  border-radius:12px;overflow:hidden;}
#hpfill{height:100%;width:100%;background:linear-gradient(90deg,#ff5d5d,#ffd24d,#5dff8f);transition:width .18s;}
#doorState{display:inline-block;font-size:15px;padding:5px 14px;background:rgba(0,0,0,.45);
  border:1px solid rgba(54,230,255,.5);border-radius:20px;color:var(--neon);}
.hud-right{align-items:flex-end;}
.timer-box{display:flex;align-items:baseline;gap:8px;}
.t-label{font-size:13px;color:#9fb6c9;}
#timer{font-size:30px;color:#fff;font-variant-numeric:tabular-nums;}
.best-box{font-size:13px;color:#ffd24d;}

.screen{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:18px;text-align:center;
  background:radial-gradient(ellipse at center,rgba(8,12,24,.78),rgba(3,4,10,.94));
  backdrop-filter:blur(3px);z-index:10;}
.screen h1{font-size:64px;letter-spacing:2px;background:linear-gradient(90deg,var(--neon),var(--neon2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 4px 18px rgba(54,230,255,.45));}
.screen h1 span{-webkit-text-fill-color:#ffd24d;}
.screen h1.win{background:linear-gradient(90deg,#5dff8f,#36e6ff);-webkit-background-clip:text;background-clip:text;color:transparent;}
.screen h1.lose{background:linear-gradient(90deg,#ff5d5d,#ff3df0);-webkit-background-clip:text;background-clip:text;color:transparent;}
.sub{color:#bcd4e6;font-size:18px;}
.ctrl{position:absolute;bottom:26px;color:#7d93a6;font-size:14px;}
.levels{display:flex;gap:16px;}
.lvl{width:140px;height:96px;border-radius:14px;cursor:pointer;
  background:linear-gradient(160deg,rgba(54,230,255,.12),rgba(255,61,240,.10));
  border:2px solid rgba(54,230,255,.45);color:#eaf6ff;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:6px;transition:transform .12s,box-shadow .12s,border-color .12s;}
.lvl b{font-size:34px;color:var(--neon);}
.lvl span{font-size:15px;}
.lvl:hover{transform:translateY(-4px) scale(1.04);border-color:var(--neon2);box-shadow:0 10px 30px rgba(54,230,255,.3);}
button.big{font-size:22px;font-weight:bold;padding:14px 34px;cursor:pointer;border-radius:30px;border:none;
  color:#06080f;background:linear-gradient(90deg,var(--neon),#7af0ff);box-shadow:0 8px 26px rgba(54,230,255,.4);transition:transform .12s;}
button.big:hover{transform:scale(1.05);}
.btns{display:flex;gap:14px;align-items:center;}
.btns button:not(.big){font-size:16px;padding:11px 22px;cursor:pointer;border-radius:24px;
  background:rgba(255,255,255,.08);color:#eaf6ff;border:2px solid rgba(255,255,255,.25);transition:transform .12s;}
.btns button:not(.big):hover{transform:scale(1.05);border-color:var(--neon);}
.result{background:rgba(0,0,0,.4);border:1px solid rgba(255,255,255,.18);border-radius:16px;padding:18px 30px;min-width:330px;}
.result .row{display:flex;justify-content:space-between;gap:40px;font-size:20px;padding:8px 0;}
.result .row b{font-variant-numeric:tabular-nums;}
.result .row.best b{color:#ffd24d;}
.result .row.total b{color:var(--good);}
.result .row + .row{border-top:1px solid rgba(255,255,255,.12);}

/* final scoreboard */
.scoreboard{border-collapse:collapse;background:rgba(0,0,0,.42);border:1px solid rgba(255,255,255,.18);
  border-radius:16px;overflow:hidden;min-width:420px;}
.scoreboard td{padding:11px 26px;font-size:20px;}
.scoreboard tr+tr td{border-top:1px solid rgba(255,255,255,.1);}
.scoreboard .sb-name{color:#cfe2f1;text-align:left;}
.scoreboard .sb-name .idx{display:inline-block;width:26px;height:26px;line-height:26px;text-align:center;
  border-radius:7px;background:rgba(54,230,255,.18);color:var(--neon);font-weight:bold;margin-right:10px;font-size:15px;}
.scoreboard .sb-time{text-align:right;font-variant-numeric:tabular-nums;color:#fff;}
.scoreboard tr.sb-total td{font-size:23px;font-weight:bold;background:rgba(54,230,255,.10);}
.scoreboard tr.sb-total .sb-time{color:var(--good);}
.scoreboard tr.sb-best .sb-time{color:#ffd24d;}
.scoreboard tr.sb-best td{font-size:16px;color:#9fb6c9;}
/* cover page */
.cover{background:#000;gap:0;}
.cover-img{max-width:100%;max-height:100%;width:auto;height:100%;object-fit:contain;image-rendering:auto;}
.press{position:absolute;bottom:34px;font-size:20px;letter-spacing:2px;color:#eaf6ff;
  text-shadow:0 2px 10px #000;animation:blink 1.1s steps(1) infinite;}
.press b{color:var(--neon);}
@keyframes blink{50%{opacity:.25;}}

/* tutorial page */
.tut{background:radial-gradient(ellipse at center,#0a0e1a,#000);gap:26px;}
.tut-title{font-size:46px;letter-spacing:3px;background:linear-gradient(90deg,var(--neon),var(--neon2));
  -webkit-background-clip:text;background-clip:text;color:transparent;}
.tut-grid{display:grid;grid-template-columns:repeat(3,minmax(220px,300px));gap:16px;max-width:1000px;}
.tut-card{background:rgba(255,255,255,.05);border:1px solid rgba(54,230,255,.3);border-radius:14px;
  padding:16px 18px;text-align:left;display:flex;flex-direction:column;gap:6px;}
.tut-card .ico{display:inline-block;font-size:15px;font-weight:bold;color:#06080f;background:var(--neon);
  padding:3px 10px;border-radius:8px;align-self:flex-start;}
.tut-card b{font-size:19px;color:#fff;}
.tut-card i{font-style:normal;font-size:13px;color:#9fb6c9;line-height:1.5;}
.tut-card.goal{border-color:rgba(93,255,143,.5);} .tut-card.goal .ico{background:var(--good);}
.tut-card.time{border-color:rgba(255,210,77,.5);} .tut-card.time .ico{background:#ffd24d;}
/* keyboard focus highlight */
.kbfocus{outline:none;position:relative;transform:scale(1.06);
  box-shadow:0 0 0 3px var(--neon),0 8px 30px rgba(54,230,255,.5) !important;
  border-color:var(--neon) !important;z-index:1;}
.lvl.kbfocus{transform:translateY(-4px) scale(1.07);}
.lvl-row{display:flex;align-items:center;gap:12px;margin-top:4px;}
.lvl-lead{font-size:15px;color:#9fb6c9;letter-spacing:2px;}
.tut .lvl{width:128px;height:74px;}
.tut .lvl b{font-size:26px;}
.tut .lvl span{font-size:13px;}

#loadbar{width:320px;height:14px;background:rgba(255,255,255,.12);border-radius:8px;overflow:hidden;}
#loadfill{height:100%;width:0%;background:linear-gradient(90deg,var(--neon),var(--neon2));transition:width .2s;}