:root{
  --bg:#05060f; --panel:#0b1024; --panel2:#0e1530;
  --cyan:#3fe0ff; --magenta:#ff5db1; --gold:#ffe94f; --green:#7effb0;
  --border:rgba(90,180,255,0.18); --txt:#cfe4ff;
}
*{box-sizing:border-box;margin:0;padding:0;}
html,body{height:100%;overflow:hidden;background:var(--bg);color:var(--txt);
  font-family:'Rajdhani',sans-serif;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;}
body{background:
  radial-gradient(ellipse at 20% 10%, rgba(63,224,255,0.08), transparent 50%),
  radial-gradient(ellipse at 80% 90%, rgba(255,93,177,0.08), transparent 50%),
  #05060f;}

#game-wrap{display:flex;flex-direction:column;height:100vh;height:100dvh;}

/* HUD */
#hud{display:flex;justify-content:space-between;align-items:center;
  padding:8px 12px;gap:8px;flex-wrap:wrap;
  background:rgba(11,16,36,0.85);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);}
.hud-left{display:flex;gap:6px;flex-wrap:wrap;}
.stat{display:flex;align-items:center;gap:5px;padding:5px 11px;
  background:var(--panel2);border:1px solid var(--border);border-radius:8px;
  font-family:'Orbitron';font-weight:600;font-size:14px;}
.stat .ico{font-size:15px;}
#stat-gold .ico{color:var(--gold);} #stat-gold{color:var(--gold);}
#stat-lives .ico{color:var(--magenta);} #stat-lives{color:var(--magenta);}
#stat-wave .ico{color:var(--cyan);} #stat-wave{color:var(--cyan);}
#stat-score .ico{color:var(--green);} #stat-score{color:var(--green);}
.hud-right{display:flex;gap:6px;flex-wrap:wrap;}

.hud-btn{font-family:'Orbitron';font-weight:700;font-size:12px;letter-spacing:0.5px;
  padding:8px 14px;border-radius:8px;cursor:pointer;
  background:var(--panel2);color:var(--cyan);border:1px solid var(--border);
  transition:.15s;text-transform:uppercase;}
.hud-btn:hover{background:#152047;box-shadow:0 0 12px rgba(63,224,255,0.3);}
.hud-btn.primary{background:linear-gradient(135deg,#1a6fff,#3fe0ff);color:#031;border:none;
  box-shadow:0 0 16px rgba(63,224,255,0.4);}
.hud-btn.primary:hover{box-shadow:0 0 24px rgba(63,224,255,0.7);}
.hud-btn.active{background:linear-gradient(135deg,#ff2e63,#ff5db1);color:#fff;
  animation:pulseBtn 1s infinite;}
.hud-btn.off{opacity:0.4;}
@keyframes pulseBtn{0%,100%{box-shadow:0 0 10px rgba(255,93,177,0.4);}50%{box-shadow:0 0 22px rgba(255,93,177,0.9);}}

/* Stage */
#stage{flex:1;position:relative;display:flex;align-items:center;justify-content:center;
  overflow:hidden;min-height:0;
  background:radial-gradient(ellipse at center, #0a0f24 0%, #05060f 80%);}
#canvas{border-radius:6px;box-shadow:0 0 40px rgba(63,224,255,0.1), inset 0 0 60px rgba(0,0,0,0.5);
  touch-action:none;}

#toast{position:absolute;top:16px;left:50%;transform:translateX(-50%) translateY(-30px);
  background:rgba(11,16,36,0.95);border:1px solid var(--magenta);color:#fff;
  padding:10px 22px;border-radius:10px;font-family:'Orbitron';font-weight:700;font-size:14px;
  letter-spacing:1px;opacity:0;pointer-events:none;transition:.35s;z-index:20;
  box-shadow:0 0 24px rgba(255,93,177,0.4);white-space:nowrap;}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* Tower popup */
#tower-popup{position:absolute;width:180px;z-index:15;
  background:rgba(11,16,36,0.97);border:1px solid var(--border);border-radius:10px;
  padding:10px;box-shadow:0 8px 30px rgba(0,0,0,0.6);backdrop-filter:blur(8px);}
#tower-popup.hidden{display:none;}
.pop-head{font-family:'Orbitron';font-weight:700;font-size:13px;margin-bottom:6px;}
.pop-head .lvl{font-size:10px;color:var(--gold);float:right;}
.pop-stats{font-size:12px;color:#9fb8e0;margin-bottom:8px;line-height:1.4;}
.pop-btns{display:flex;flex-direction:column;gap:5px;}
.pop-btns button{font-family:'Orbitron';font-size:11px;font-weight:700;padding:7px;
  border-radius:6px;cursor:pointer;border:1px solid var(--border);
  background:var(--panel2);color:var(--cyan);}
.pop-btns button:hover{background:#152047;}
.pop-btns button:disabled{opacity:0.5;cursor:default;}
.pop-btns .sell{color:var(--gold);border-color:rgba(255,233,79,0.3);}

/* Controls */
#controls{background:rgba(11,16,36,0.9);backdrop-filter:blur(12px);
  border-top:1px solid var(--border);padding:8px;}
.tabs{display:flex;gap:6px;margin-bottom:8px;}
.tab{flex:1;font-family:'Orbitron';font-weight:700;font-size:12px;padding:7px;
  border-radius:8px;cursor:pointer;background:var(--panel);color:#7f9dc0;
  border:1px solid var(--border);transition:.15s;}
.tab.active{background:linear-gradient(135deg,#152047,#1e2d5c);color:var(--cyan);
  box-shadow:0 0 12px rgba(63,224,255,0.25);}

#tower-list{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;
  scrollbar-width:thin;scrollbar-color:var(--cyan) transparent;}
#tower-list::-webkit-scrollbar{height:6px;}
#tower-list::-webkit-scrollbar-thumb{background:var(--cyan);border-radius:3px;}
.tcard{flex:0 0 auto;width:150px;display:flex;align-items:center;gap:8px;
  padding:8px;border-radius:10px;cursor:pointer;text-align:left;
  background:var(--panel2);border:1px solid var(--tc);
  border-left:4px solid var(--tc);transition:.15s;color:var(--txt);}
.tcard:hover{background:#152047;box-shadow:0 0 14px color-mix(in srgb,var(--tc) 40%,transparent);}
.tcard.sel{background:#1a2a55;box-shadow:0 0 18px var(--tc);}
.tcard.poor{opacity:0.45;}
.tico{font-family:'Orbitron';font-size:22px;color:var(--tc);
  width:32px;text-align:center;text-shadow:0 0 10px var(--tc);}
.tinfo{flex:1;min-width:0;}
.tname{font-family:'Orbitron';font-weight:600;font-size:12px;color:#fff;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.tdesc{font-size:11px;color:#8fa8d0;line-height:1.2;}
.tcost{font-family:'Orbitron';font-weight:700;font-size:13px;color:var(--gold);}

/* Footer */
footer{display:flex;justify-content:space-between;align-items:center;
  padding:5px 12px;font-size:11px;color:#5f7ba0;
  border-top:1px solid var(--border);background:rgba(5,6,15,0.9);
  font-family:'Orbitron';letter-spacing:1px;}
footer a{color:var(--cyan);text-decoration:none;}
footer a:hover{text-shadow:0 0 8px var(--cyan);}

/* Overlay */
.overlay{position:fixed;inset:0;z-index:50;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(ellipse at center,rgba(10,15,36,0.95),rgba(5,6,15,0.98));
  backdrop-filter:blur(6px);overflow-y:auto;padding:20px;}
.overlay.hidden{display:none;}
.overlay-card{max-width:520px;width:100%;text-align:center;padding:10px;
  animation:cardIn .5s ease;}
@keyframes cardIn{from{opacity:0;transform:translateY(20px) scale(0.96);}to{opacity:1;transform:none;}}
.title{font-family:'Orbitron';font-weight:900;font-size:clamp(38px,10vw,68px);
  line-height:0.95;letter-spacing:3px;color:#fff;margin-bottom:8px;
  text-shadow:0 0 30px rgba(63,224,255,0.6);}
.title span{display:block;background:linear-gradient(135deg,#3fe0ff,#ff5db1);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:none;}
.title.gameover{text-shadow:0 0 30px rgba(255,46,99,0.7);}
.title.gameover span{background:linear-gradient(135deg,#ff2e63,#ff5db1);
  -webkit-background-clip:text;background-clip:text;color:transparent;}
.subtitle{font-size:16px;color:#9fb8e0;margin-bottom:18px;line-height:1.4;max-width:420px;margin-left:auto;margin-right:auto;}
.how{display:flex;flex-direction:column;gap:6px;margin-bottom:20px;font-size:14px;color:#7fa0c8;}
.how div{padding:6px;background:var(--panel2);border-radius:8px;border:1px solid var(--border);}
.hud-btn.big{font-size:16px;padding:14px 30px;margin-bottom:22px;}
.score-board{display:flex;justify-content:center;gap:18px;margin-bottom:14px;flex-wrap:wrap;}
.score-board>div{display:flex;flex-direction:column;padding:12px 16px;
  background:var(--panel2);border:1px solid var(--border);border-radius:10px;}
.big-num{font-family:'Orbitron';font-weight:900;font-size:30px;color:var(--cyan);}
.score-board>div span:last-child{font-size:11px;color:#8fa8d0;letter-spacing:1px;}
.best{color:var(--gold);font-family:'Orbitron';font-size:13px;margin-bottom:16px;}

.lb-wrap{margin-top:8px;background:var(--panel);border:1px solid var(--border);
  border-radius:12px;padding:14px;}
.lb-wrap h3{font-family:'Orbitron';font-size:13px;color:var(--magenta);margin-bottom:10px;letter-spacing:1px;}
#leaderboard{display:flex;flex-direction:column;gap:4px;}
.lb-row{display:flex;align-items:center;gap:8px;padding:6px 8px;
  background:var(--panel2);border-radius:6px;font-size:13px;}
.lb-rank{font-family:'Orbitron';font-weight:700;color:var(--gold);width:20px;}
.lb-name{flex:1;text-align:left;color:#cfe4ff;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.lb-wave{color:var(--cyan);font-family:'Orbitron';font-size:11px;}
.lb-score{color:var(--green);font-family:'Orbitron';font-weight:700;}
.lb-empty{color:#6f8ab0;font-size:13px;padding:8px;}
#auth-status{margin-top:12px;font-size:12px;}
.authed{color:var(--green);}
.loginlink{color:var(--cyan);text-decoration:none;}
.loginlink:hover{text-shadow:0 0 8px var(--cyan);}

@media(max-width:600px){
  .stat{font-size:12px;padding:4px 8px;}
  .hud-btn{font-size:10px;padding:6px 9px;}
  .tcard{width:135px;}
  footer span{display:none;}
  footer{justify-content:center;}
}