*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden;background:#061427;color:#cfe8ff;font-family:"Segoe UI",Roboto,system-ui,Arial;overscroll-behavior:none;display:flex;flex-direction:column}

/* ── Layout ────────────────────────────────────────────────────────────────── */
#layout{flex:1;display:flex;flex-direction:row;overflow:hidden;min-height:0}
#game-wrapper{flex:1;position:relative;overflow:hidden}
canvas{display:block;width:100%;height:100%;touch-action:none;-webkit-tap-highlight-color:transparent}

/* ── Ad slots ──────────────────────────────────────────────────────────────── */
.ad-slot{background:#060f1c;display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden}
#ad-left,#ad-right{width:160px}
#ad-top,#ad-bottom{height:60px;display:none;width:100%}

@media(max-width:768px){#ad-top,#ad-bottom{display:flex}#ad-left,#ad-right{display:none}}
@media(pointer:coarse) and (orientation:portrait){#ad-top,#ad-bottom{display:flex}#ad-left,#ad-right{display:none}}
@media(pointer:coarse) and (orientation:landscape){
  #ad-top,#ad-bottom{display:none}
  #ad-left,#ad-right{display:flex;width:120px}
  #ad-left{padding-left:env(safe-area-inset-left)}
  #ad-right{padding-right:env(safe-area-inset-right)}
}

/* ── Ad inner ──────────────────────────────────────────────────────────────── */
.ad-inner{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;padding:12px 8px;text-align:center;width:100%;height:100%}
.ad-symbol{font-size:28px;line-height:1;opacity:.9}
.ad-name{font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;line-height:1.2}
.ad-tag{font-size:9px;letter-spacing:.08em;text-transform:uppercase;opacity:.55;line-height:1.3}

[data-co="weyland"]  .ad-symbol,[data-co="weyland"]  .ad-name{color:#5bb8e8;text-shadow:0 0 10px rgba(91,184,232,.5)}
[data-co="umbrella"] .ad-symbol,[data-co="umbrella"] .ad-name{color:#e84040;text-shadow:0 0 10px rgba(232,64,64,.5)}
[data-co="cyberdyne"].ad-symbol,[data-co="cyberdyne"].ad-name{color:#e8a020;text-shadow:0 0 10px rgba(232,160,32,.5)}
[data-co="weyland"]  .ad-tag{color:#5bb8e8}
[data-co="umbrella"] .ad-tag{color:#e84040}
[data-co="cyberdyne"].ad-tag{color:#e8a020}

#ad-top .ad-inner,#ad-bottom .ad-inner{flex-direction:row;gap:10px;padding:0 16px}
#ad-top .ad-symbol,#ad-bottom .ad-symbol{font-size:20px}
#ad-top .ad-tag,#ad-bottom .ad-tag{display:none}
#ad-top .ad-name,#ad-bottom .ad-name{font-size:10px}

/* ── Fullscreen button ─────────────────────────────────────────────────────── */
#fs-btn{position:absolute;bottom:10px;right:10px;z-index:30;background:rgba(6,20,39,0.72);border:1px solid rgba(102,238,255,0.28);color:rgba(102,238,255,0.65);font-size:15px;line-height:1;padding:6px 9px;border-radius:4px;cursor:pointer;transition:border-color .15s,color .15s;-webkit-tap-highlight-color:transparent}
#fs-btn:hover{border-color:#6ef;color:#6ef}

/* ── Start screen ──────────────────────────────────────────────────────────── */
#start-screen{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:rgba(6,20,39,0.82);z-index:20;transition:opacity .45s ease}
#start-screen.hidden{opacity:0;pointer-events:none}
#start-content{display:flex;flex-direction:column;align-items:center;gap:22px;text-align:center;padding:0 24px}
#start-title{margin:0;font-size:clamp(48px,11vw,110px);font-weight:900;letter-spacing:.18em;text-transform:uppercase;color:#6ef;text-shadow:0 0 20px #6ef,0 0 50px #3af,0 4px 10px rgba(0,0,0,.9);line-height:1}
#start-sub{margin:0;font-size:clamp(13px,2vw,18px);letter-spacing:.25em;text-transform:uppercase;color:#6ab;opacity:.8}
#start-btn{font-family:inherit;font-size:clamp(16px,2.5vw,22px);font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:#061427;background:#6ef;border:none;border-radius:6px;padding:14px 56px;cursor:pointer;box-shadow:0 0 18px rgba(102,238,255,.55);transition:background .14s,transform .1s,box-shadow .14s}
#start-btn:hover{background:#fff;transform:scale(1.07);box-shadow:0 0 32px rgba(102,238,255,.85)}
#start-btn:active{transform:scale(0.96)}
#start-controls{margin:0;font-size:clamp(10px,1.5vw,13px);line-height:1.9;letter-spacing:.04em;color:#6ab;opacity:.6}
#start-credit{position:absolute;bottom:18px;left:0;right:0;text-align:center;margin:0;font-size:clamp(10px,1.4vw,13px);letter-spacing:.08em;color:#6ab;opacity:.45}

@media(pointer:coarse){#start-btn{padding:20px 72px;font-size:clamp(18px,3vw,26px)}#start-controls{display:none}}

/* ── Wave complete modal ───────────────────────────────────────────────────── */
#level-complete{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;z-index:20;background:rgba(6,20,39,0.78)}
#level-complete.hidden{display:none}
#level-complete-content{width:min(680px,92%);background:rgba(6,16,30,0.92);padding:22px;border-radius:10px;box-shadow:0 10px 40px rgba(0,0,0,.7);text-align:center;display:flex;flex-direction:column;gap:16px}
#level-complete h2{margin:0;font-size:clamp(26px,4.5vw,46px);color:#6ef}
#level-complete p{margin:0;color:#dfe;opacity:.9}
#lc-ad{height:110px;display:flex;align-items:center;justify-content:center;background:#071627;border-radius:8px}
#lc-actions{display:flex;justify-content:center}
#lc-continue{background:#6ef;color:#061427;border:none;padding:10px 28px;border-radius:6px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;cursor:pointer;font-family:inherit;font-size:14px;transition:background .14s,transform .1s}
#lc-continue:hover{background:#fff;transform:scale(1.05)}

@media(max-width:480px){#lc-ad{height:86px}#level-complete-content{padding:14px}}