:root{
    --sky:#EAF7E6;
    --sky-dark:#D9EEC9;
    --wood-dark:#5B3620;
    --wood-mid:#8A5A30;
    --wood-light:#A9784A;
    --cream:#FCF2DC;
    --cream-dark:#E9D9B4;
    --leaf:#4C8C4A;
    --leaf-dark:#376B36;
    --gold:#F4B93F;
    --red:#D65B4A;
    --ink:#43281A;
    --ink-soft:#6B4A32;
    --white:#FFFDF7;
  }
  *{box-sizing:border-box; -webkit-tap-highlight-color:transparent; user-select:none;}
  button, .power-btn{touch-action:manipulation;}
  button:focus-visible, .power-btn:focus-visible{outline:3px solid var(--gold); outline-offset:3px;}
  html,body{margin:0; padding:0; width:100%; height:100%; overflow:hidden; font-family:'Nunito',sans-serif; background:var(--sky); color:var(--ink);}
  #app{position:relative; width:100vw; height:100vh; height:100dvh; overflow:hidden;}

  .screen{position:absolute; inset:0; display:none; flex-direction:column;}
  .screen.active{display:flex;}

  /* ---------- Startup loading gate ---------- */
  .loading-screen{
    position:absolute; inset:0; z-index:100; display:flex; align-items:center; justify-content:center;
    background:
      repeating-linear-gradient(0deg, transparent 0 46px, rgba(76,140,74,0.05) 46px 48px),
      radial-gradient(120% 70% at 50% 0%, #FFFDF3 0%, var(--sky) 55%, var(--sky-dark) 100%);
    transition:opacity .32s cubic-bezier(.16,1,.3,1), visibility .32s cubic-bezier(.16,1,.3,1);
  }
  .loading-screen.ready{opacity:0; visibility:hidden; pointer-events:none;}
  .loading-panel{
    width:min(86vw,320px); padding:28px 24px 24px; text-align:center;
    background:linear-gradient(180deg,var(--cream),var(--cream-dark));
    border:5px solid var(--wood-dark); border-radius:24px;
    box-shadow:0 10px 0 var(--wood-dark),0 18px 28px rgba(0,0,0,.18);
  }
  .loading-mark{
    width:54px; height:54px; margin:0 auto 14px; display:grid; place-items:center;
    color:var(--gold); background:var(--leaf-dark); border:4px solid var(--wood-dark);
    border-radius:50%; font-size:28px; animation:loadingPulse 1.1s ease-in-out infinite;
  }
  .loading-title{font-family:'Baloo 2',sans-serif;font-size:24px;font-weight:800;color:var(--wood-dark);line-height:1.1;}
  .loading-status{margin-top:6px;color:var(--ink-soft);font-size:13px;font-weight:700;}
  .loading-track{height:12px;margin-top:18px;padding:2px;border-radius:999px;background:rgba(67,40,26,.16);overflow:hidden;}
  .loading-bar{height:100%;width:0;border-radius:999px;background:linear-gradient(90deg,var(--leaf),var(--gold));transition:width .18s ease-out;}
  .loading-percent{margin-top:8px;color:var(--leaf-dark);font-size:13px;font-weight:800;font-variant-numeric:tabular-nums;}
  @keyframes loadingPulse{0%,100%{transform:scale(1);opacity:.9}50%{transform:scale(1.08);opacity:1}}

  /* ---------- shared background: soft sunny jungle-clearing gradient ---------- */
  .bg-stripes{
    position:absolute; inset:0;
    background:
      repeating-linear-gradient(0deg, transparent 0 46px, rgba(76,140,74,0.05) 46px 48px),
      radial-gradient(120% 70% at 50% 0%, #FFFDF3 0%, var(--sky) 55%, var(--sky-dark) 100%);
    z-index:0;
  }
  .corner-leaf{position:absolute; width:96px; height:auto; opacity:0.95; z-index:1; pointer-events:none; object-fit:contain;}
  .corner-leaf.tl{top:6px; left:6px;}
  .corner-leaf.tr{top:6px; right:6px; transform:scaleX(-1);}
  .corner-leaf.bl{bottom:6px; left:6px; transform:scaleY(-1);}
  .corner-leaf.br{bottom:6px; right:6px; transform:scale(-1,-1);}

  /* ---------- Title screen ---------- */
  #startScreen{align-items:center; justify-content:center; text-align:center;}
  .title-wrap{position:relative; z-index:2; display:flex; flex-direction:column; align-items:center; gap:22px; padding:20px;}
  .title-logo{width:min(78vw,340px); animation:bob 2.6s ease-in-out infinite;}
  .title-logo img{width:100%; height:auto; display:block; object-fit:contain;}
  .hero-tiles{display:flex; gap:10px;}
  .hero-tiles .htile2{
    width:64px; animation:bob 2.4s ease-in-out infinite;
  }
  .hero-tiles .htile2 img{width:100%; height:auto; object-fit:contain; display:block;}
  .hero-tiles .htile2:nth-child(2){animation-delay:.2s;}
  .hero-tiles .htile2:nth-child(3){animation-delay:.4s;}
  .hero-tiles .htile2:nth-child(4){animation-delay:.6s;}
  @keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
  .btn{
    font-family:'Baloo 2', sans-serif; font-weight:700; font-size:20px; letter-spacing:1px;
    color:var(--white); background:linear-gradient(180deg, var(--leaf), var(--leaf-dark));
    border:none; border-radius:18px; padding:16px 42px; cursor:pointer;
    box-shadow:0 7px 0 #2c5a2b, 0 10px 16px rgba(0,0,0,0.25);
    transition:transform .08s ease;
  }
  .btn:active{transform:translateY(5px); box-shadow:0 2px 0 #2c5a2b;}
  .btn.secondary{background:linear-gradient(180deg, var(--wood-light), var(--wood-mid)); box-shadow:0 7px 0 var(--wood-dark), 0 10px 16px rgba(0,0,0,0.25);}
  .btn.secondary:active{box-shadow:0 2px 0 var(--wood-dark);}
  .btn.small{padding:10px 22px; font-size:15px; border-radius:12px;}
  .btn:disabled{opacity:0.4; pointer-events:none;}
  .btn-icon{width:1.35em; height:1.35em; vertical-align:-0.35em; margin:0 4px; display:inline-block; object-fit:contain;}

  /* image-only buttons: the artwork already supplies shape, border, shadow & label */
  .btn.img-btn{
    background:none; border:none; box-shadow:none; padding:0; border-radius:0;
    display:block; height:auto;
  }
  .btn.img-btn img, .btn.img-btn{ display:block; }
  .btn.img-btn:active{transform:translateY(4px);}

  .btn.play-btn{
    background:url('assets/ui/play_btn.webp') center/100% 100% no-repeat;
    border:none; box-shadow:none; width:min(62vw,300px); aspect-ratio:807/282; padding:0;
  }
  .btn.play-btn:active{transform:translateY(4px);}
  .btn.how-btn{
    background:url('assets/ui/howtoplay_btn.webp') center/100% 100% no-repeat;
    border:none; box-shadow:none; width:min(36vw,180px); aspect-ratio:470/165; padding:0;
  }
  .btn.how-btn:active{transform:translateY(3px);}

  /* ---------- Level select ---------- */
  #levelSelect{align-items:center;}
  .ls-header{
    position:relative; z-index:2; width:100%; display:flex; align-items:center; justify-content:space-between;
    padding:16px 18px; flex-shrink:0;
  }
  .icon-btn{
    width:54px; height:54px; border-radius:14px; border:none;
    background:none; display:flex; align-items:center; justify-content:center;
    cursor:pointer; padding:0;
  }
  .icon-btn img{width:100%; height:100%; object-fit:contain;}
  .icon-btn:active{transform:translateY(3px);}
  .icon-btn.circle-img-btn{width:56px; height:56px;}
  .ls-title{font-family:'Baloo 2',sans-serif; font-weight:800; font-size:22px; color:var(--wood-dark);}
  .ls-grid-wrap{position:relative; z-index:2; flex:1; width:100%; overflow:hidden; padding:6px 16px 0; display:flex; flex-direction:column; justify-content:center;}
  .ls-grid{display:grid; grid-template-columns:repeat(4, 1fr); gap:14px; max-width:440px; width:100%; margin:0 auto;}
  .ls-pagination{position:relative; z-index:2; display:flex; align-items:center; justify-content:center; gap:18px; padding:16px 18px 26px; flex-shrink:0;}
  .ls-page-label{font-family:'Baloo 2',sans-serif; font-weight:700; font-size:15px; color:var(--wood-dark); min-width:70px; text-align:center;}
  .pgnav-btn{
    width:56px; height:56px; aspect-ratio:auto; border:none; background:none; padding:0; cursor:pointer;
    display:flex; align-items:center; justify-content:center;
  }
  .pgnav-btn img{width:100%; height:100%; object-fit:contain; display:block;}
  .pgnav-btn:active{transform:translateY(3px);}
  .pgnav-btn:disabled{opacity:0.4; pointer-events:none;}
  .lvl-cell{
    aspect-ratio:314/247; border:none; display:flex; flex-direction:column;
    align-items:center; justify-content:center; font-family:'Baloo 2',sans-serif; font-weight:800; font-size:20px;
    background-image:url('assets/ui/lvlcell_unlocked.webp'); background-size:100% 100%; background-repeat:no-repeat;
    color:var(--ink); cursor:pointer; position:relative; text-shadow:0 2px 0 rgba(255,255,255,0.5);
  }
  .lvl-cell:active{transform:translateY(2px);}
  .lvl-cell.locked{
    background-image:url('assets/ui/lvlcell_locked.webp'); color:transparent; cursor:default;
  }
  .lvl-cell.locked:active{transform:none;}
  .lvl-cell.current{outline:3px solid var(--leaf); outline-offset:3px; border-radius:16px;}
  .lvl-cell .lvl-num{padding-bottom:14%;}

  /* ---------- Game screen ---------- */
  #gameScreen{align-items:stretch;}
  #canvasWrap{position:relative; flex:1; min-height:0; width:100%; overflow:hidden; padding:6px 4px;}
  #canvasWrap canvas{display:block; width:100%; height:100%; touch-action:none;}

  .hud-top{
    position:relative; z-index:3; display:flex; align-items:center; justify-content:space-between;
    padding:14px 14px 0; flex-shrink:0; gap:10px;
  }
  .level-pill{
    background:linear-gradient(180deg, var(--wood-light), var(--wood-mid));
    border:3px solid var(--wood-dark); border-radius:16px; padding:10px 26px;
    font-family:'Baloo 2',sans-serif; font-weight:700; font-size:18px; color:var(--white);
    box-shadow:0 5px 0 var(--wood-dark); flex:1; text-align:center; max-width:220px; margin:0 auto;
  }

  .tray-wrap{position:relative; z-index:3; display:flex; justify-content:center; padding:8px 14px 0; flex-shrink:0;}
  .tray{
    background:linear-gradient(180deg, var(--wood-mid), var(--wood-dark));
    border:5px solid var(--gold); border-radius:20px; padding:8px 8px;
    display:flex; gap:4px; box-shadow:0 8px 20px rgba(0,0,0,0.3);
    min-height:60px; align-items:center; width:100%; max-width:480px;
  }
  .tray-slot{
    flex:1 1 0; width:auto; max-width:64px; aspect-ratio:1; min-width:0; border-radius:12px; background:rgba(255,255,255,0.08);
    border:2px dashed rgba(255,255,255,0.25); display:flex; align-items:center; justify-content:center;
    position:relative; overflow:hidden;
  }
  .tray-slot img{width:100%; height:100%; object-fit:contain;}
  .tray-slot.filled{background:transparent; border:2px solid transparent; box-shadow:none;}
  .tray-slot.pop{animation:popOut .28s ease forwards;}
  @keyframes popOut{0%{transform:scale(1)}60%{transform:scale(1.25)}100%{transform:scale(0); opacity:0;}}
  @keyframes dropIn{0%{transform:translateY(-40px) scale(0.6); opacity:0;}100%{transform:translateY(0) scale(1); opacity:1;}}
  .tray-slot.drop{animation:dropIn .22s ease;}

  .controls-row{
    position:relative; z-index:3; display:flex; justify-content:center; gap:16px;
    padding:14px 14px 20px; flex-shrink:0;
  }
  .power-btn{
    width:72px; height:auto; aspect-ratio:216/173; border:none; background:none;
    display:flex; align-items:center; justify-content:center; cursor:pointer; position:relative;
  }
  .power-btn:active{transform:translateY(3px);}
  .power-btn.disabled{opacity:0.45; pointer-events:none;}
  .power-btn .pi{width:100%; height:100%; object-fit:contain; display:block;}
  .power-btn .count{
    position:absolute; top:-2px; right:2px; background:var(--red); color:#fff; font-size:11px; font-weight:800;
    width:20px; height:20px; border-radius:50%; display:flex; align-items:center; justify-content:center;
    border:2px solid var(--white); z-index:2;
  }

  .toast{
    position:absolute; top:78px; left:50%; transform:translateX(-50%); z-index:5;
    background:rgba(67,40,26,0.92); color:var(--white); padding:8px 18px; border-radius:12px;
    font-weight:700; font-size:14px; opacity:0; pointer-events:none; transition:opacity .2s ease;
  }
  .toast.show{opacity:1;}

  /* ---------- Modals ---------- */
  .modal-overlay{
    position:absolute; inset:0; background:rgba(30,18,10,0.55); z-index:10; display:none;
    align-items:center; justify-content:center; padding:20px;
  }
  .modal-overlay.active{display:flex;}
  .modal-card{
    background:linear-gradient(180deg, var(--cream), var(--cream-dark)); border:6px solid var(--wood-dark);
    border-radius:24px; padding:30px 26px; text-align:center; max-width:340px; width:100%;
    box-shadow:0 14px 0 var(--wood-dark), 0 20px 30px rgba(0,0,0,0.3);
  }
  .modal-card h2{font-family:'Baloo 2',sans-serif; margin:0 0 6px; font-size:28px; color:var(--leaf-dark);}
  .modal-card.lose h2{color:var(--red);}
  .modal-card .stars-row{margin:14px 0; display:flex; align-items:center; justify-content:center; gap:8px;}
  .modal-card .stars-row img{width:38px; height:38px; object-fit:contain;}
  .modal-card p{margin:0 0 18px; color:var(--ink-soft); font-weight:600;}
  .modal-btns{display:flex; gap:10px; justify-content:center; flex-wrap:wrap;}

  /* ---------- Level Complete modal ---------- */
  .modal-card.complete-card{
    background:
      radial-gradient(circle at 50% 0%, rgba(255,255,255,0.72), transparent 48%),
      linear-gradient(180deg, var(--cream), var(--cream-dark));
    border:6px solid var(--wood-dark); border-radius:28px;
    box-shadow:0 12px 0 var(--wood-dark), 0 22px 34px rgba(0,0,0,0.32);
    padding:16px 14px 18px; max-width:360px; width:100%;
    display:flex; flex-direction:column; align-items:center; gap:0;
  }
  .complete-anim{
    width:100%; max-width:300px; height:auto; display:block; object-fit:contain;
    margin:-4px 0 -8px;
  }
  .btn.next-btn{
    background:url('assets/ui/next_btn.webp') center/100% 100% no-repeat;
    border:none; box-shadow:none; width:min(36vw,160px); aspect-ratio:603/248; padding:0;
    flex:none; margin-top:0;
  }
  .btn.next-btn:active{transform:translateY(4px);}

  /* ---------- How to Play modal: instruction tab image + Back button ---------- */
  .modal-card.how-card{
    background:
      radial-gradient(circle at 50% 0%, rgba(255,255,255,0.72), transparent 48%),
      linear-gradient(180deg, var(--cream), var(--cream-dark));
    border:6px solid var(--wood-dark); border-radius:28px;
    box-shadow:0 12px 0 var(--wood-dark), 0 22px 34px rgba(0,0,0,0.32);
    padding:14px 14px 18px; max-width:370px; width:100%;
    display:flex; flex-direction:column; align-items:center; gap:4px;
    max-height:92vh; overflow:hidden;
  }
  .instruction-tab{width:100%; max-width:320px; height:auto; max-height:68vh; object-fit:contain; display:block;}
  .btn.back-label-btn{
    background:url('assets/ui/back_btn_label.webp') center/100% 100% no-repeat;
    border:none; box-shadow:none; width:min(35vw,155px); aspect-ratio:364/148; padding:0;
  }
  .btn.back-label-btn:active{transform:translateY(3px);}

  ::-webkit-scrollbar{width:8px;}
  ::-webkit-scrollbar-thumb{background:var(--wood-mid); border-radius:8px;}