:root {
            --bottle-width: 65px;
            --bottle-height: 190px;
            --pour-duration: 500ms;
        }

        body {
            font-family: 'Inter', sans-serif;
            -webkit-tap-highlight-color: transparent;
            touch-action: manipulation;
        }

        html, body {
            overflow: hidden;
            height: 100%;
        }

        .game-background {
            background: radial-gradient(circle at 50% 0%, #7c3aed 0%, #4c1d95 40%, #2e1065 100%);
            position: relative;
        }
        
        #star-canvas {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 0;
        }

        .bottle-container {
            width: var(--bottle-width);
            height: var(--bottle-height);
            position: relative;
            cursor: pointer;
            transition: transform 0.3s cubic-bezier(0.25, 1, 0.5, 1), filter 0.3s, box-shadow 0.3s;
            filter: drop-shadow(0 4px 6px rgba(0,0,0,0.25));
            will-change: transform, filter, box-shadow;
            backface-visibility: hidden;
        }
        
        .bottle-base-img, .bottle-shade-img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none; 
            background-size: contain;
            background-position: center;
            background-repeat: no-repeat;
        }

        .bottle-base-img {
            z-index: 1;
        }
        
        .bottle-shade-img {
            z-index: 4;
        }

        .bottle-container.selected {
            transform: translateY(-30px) scale(1.08);
            
             filter: drop-shadow(0 4px 6px rgba(0,0,0,0.25)) 
            drop-shadow(0 0 15px rgba(167, 139, 250, 0.8));
        }

        .bottle-container.completed {
            cursor: default;
            pointer-events: none;
        }

        .liquid-container {
            position: absolute;
            width: 77.33%; /* 58/75 */
            height: 76.36%; /* 168/220 */
            bottom: 5.9%; /* 13/220 */
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            flex-direction: column-reverse;
            overflow: hidden;
            z-index: 2;
            border-bottom-left-radius: 43% 15%;
            border-bottom-right-radius: 43% 15%;
            mask-image: linear-gradient(to top, black, black);
            -webkit-mask-image: linear-gradient(to top, black, black);
            clip-path: polygon(0% 25%, 18% 0, 82% 0, 100% 25%, 100% 100%, 0% 100%);
            -webkit-clip-path: polygon(0% 25%, 18% 0, 82% 0, 100% 25%, 100% 100%, 0% 100%);
            padding-top: 4.7%; /* 8/168 */
            box-sizing: border-box;
            transition: opacity 0.2s ease-out;
        }

        .liquid-container.is-pouring {
            overflow: visible;
        }

        .color-segment {
            width: 100%;
            position: relative;
            margin-top: -1px;
            backface-visibility: hidden;
            transform: translateZ(0);
        }
        
        .bottle-container.selected .color-segment {
            margin-top: -1.2px;
        }

        .color-segment.is-hidden {
            background: #2e1065;
            border-top: 1px solid rgba(255,255,255,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }
        .color-segment.is-hidden::before { display: none; }
        .color-segment.is-hidden::after {
            content: '?';
            font-family: 'Inter', sans-serif;
            font-weight: 700;
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.5);
            text-shadow: 0 1px 2px rgba(0,0,0,0.5);
        }

        @keyframes reveal-segment {
            from { filter: brightness(0.2) blur(5px); transform: scale(0.9); }
            to { filter: brightness(1) blur(0); transform: scale(1); }
        }
        .color-segment.is-revealing > div { /* Target inner filler div */
            animation: reveal-segment 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
        }
        
        @keyframes fill-surface-up {
            from { top: var(--fill-start-top, 100%); }
            to { top: -8px; }
        }

        .color-segment:last-child:not(.is-hidden)::before,
        .color-segment.is-new-top::before,
        .color-segment.is-filling::before {
            content: '';
            position: absolute;
            left: -10%;
            width: 120%;
            height: 16px;
            background: var(--liquid-gradient);
            border-radius: 50%;
            box-shadow: inset 0px 6px 8px -4px rgba(0,0,0,0.35), 
                        inset 0px -5px 6px -3px rgba(255,255,255,0.5);
            backface-visibility: hidden;
            transform: translateZ(0);
            z-index: 2;
        }

        .color-segment:last-child:not(.is-hidden):not(.is-filling)::before,
        .color-segment.is-new-top::before {
            top: -8px;
        }

        .color-segment.is-filling::before {
            top: var(--fill-start-top, 80%);
            animation-name: fill-surface-up;
            animation-timing-function: linear;
            animation-fill-mode: forwards;
            animation-duration: var(--fill-surface-duration, 600ms);
            animation-delay: var(--fill-surface-delay, 0s);
        }
        
        .pour-point {
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 1px;
            height: 1px;
        }

        .pouring {
            transition: transform var(--pour-duration) cubic-bezier(0.6, -0.28, 0.735, 0.045); /* EaseInBack */
        }

        .pour-stream {
            position: fixed;
            width: 9px;
            background: red;
            border-radius: 4px;
            opacity: 0;
            z-index: 11;
            transform-origin: top;
            will-change: transform, opacity;
        }

        @keyframes shake {
            0%, 100% { transform: translateX(0) rotate(0); }
            25% { transform: translateX(-5px) rotate(-3deg); }
            75% { transform: translateX(5px) rotate(3deg); }
        }

        .shake {
            animation: shake 0.3s ease-in-out;
        }

        @keyframes jump-in {
            0%, 100% {
                transform: scaleY(1);
                transform-origin: bottom;
            }
            50% {
                transform: scaleY(0.95) translateY(3px);
                transform-origin: bottom;
            }
        }

        .jump-in {
            animation: jump-in 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
        }
        
        @keyframes pop-in {
            0% { transform: scale(0.5); opacity: 0; }
            80% { transform: scale(1.1); opacity: 1; }
            100% { transform: scale(1); opacity: 1; }
        }

        .win-modal, .menu-container, #booster-modal > div, #settings-modal > div {
            animation: pop-in 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }
        
        .confetti {
            position: absolute;
            background: #f00;
            top: -30px;
            opacity: 0;
            animation-name: fall;
            animation-timing-function: ease-in;
            animation-fill-mode: forwards;
            will-change: transform, opacity;
            backface-visibility: hidden;
        }
        
        @keyframes fall {
            from {
                transform: translateY(-30px) rotate(var(--start-rotation));
                opacity: 1;
            }
            to {
                transform: translateY(105vh) rotate(var(--end-rotation));
                opacity: 0;
            }
        }
        
        .cork {
            position: absolute;
            width: 54%;
            height: 22%;
            background-image: url('kork.png');
            background-size: contain;
            background-repeat: no-repeat;
            background-position: center;
            top: -5%;
            left: 50%;
            transform: translateX(-50%);
            z-index: 5;
            will-change: transform, opacity;
            backface-visibility: hidden;
        }

        .cork.animate-in {
            animation: cork-in 0.6s cubic-bezier(0.42, 0, 1, 1) 0.2s forwards;
            opacity: 0;
        }

        @keyframes cork-in {
            from {
                transform: translate(-50%, -150px) rotate(-45deg);
                opacity: 0;
            }
            to {
                transform: translateX(-50%);
                opacity: 1;
            }
        }

        .bottle-squash-animation {
            animation: bottle-squash 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
            transform-origin: bottom;
        }

        @keyframes bottle-squash {
            0%, 100% { transform: scaleY(1); }
            50% { transform: scaleY(0.9); }
        }

        .bubble {
            position: absolute;
            bottom: 0;
            border-radius: 50%;
            opacity: 0;
            animation: rise-and-fade 0.6s ease-out forwards;
            background-color: var(--bubble-color, #fff);
            z-index: 3;
            pointer-events: none;
        }

        @keyframes rise-and-fade {
            0% {
                transform: translateY(0) scale(0.5);
                opacity: 0.9;
            }
            50% { opacity: 1; }
            100% {
                transform: translateY(-60px) scale(1);
                opacity: 0;
            }
        }

        .sparkle-container{
            position:absolute; inset:0;
            pointer-events:none; z-index:999;
            contain:strict;
            overflow:visible;
            width: 100px;
            margin-left:-20px;
            height:250px;
            margin-top:-50px;
            -webkit-mask-image: linear-gradient(to top, #000 0%, #000 86%, transparent 100%);
            mask-image: linear-gradient(to top, #000 0%, #000 86%, transparent 100%);
        }

        .sparkle{
            position:absolute;
            bottom:-12px;
            left:var(--x,50%);
            opacity:0;
            animation: sparkle-rise var(--dur,1s) linear var(--delay,0s) forwards;
            will-change: transform, opacity;
        }

       .sparkle::before{

            content:"";

            display:block;

            width:var(--size,12px);

            height:var(--size,12px);

            background:#fff;

            -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><path d='M50 2 L60 34 L98 34 L66 55 L78 92 L50 70 L22 92 L34 55 L2 34 L40 34 Z' fill='black'/></svg>") center / contain no-repeat;

            mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><path d='M50 2 L60 34 L98 34 L66 55 L78 92 L50 70 L22 92 L34 55 L2 34 L40 34 Z' fill='black'/></svg>") center / contain no-repeat;

            position: relative;

            backface-visibility: hidden;

            transform: translateZ(0);

        }
        
        @keyframes sparkle-rise{
            0%   { transform: translate3d(0,0,0) scale(.6); opacity:0; }
            10%  { opacity:.95; }
            70%  { opacity:.95; }
            100% { transform: translate3d(0, calc(-1 * var(--rise,320px)), 0) scale(1.12); opacity:0; }
        }
        
        #pixel-art-container {
            width: 100px;
            height: 100px;
            border: 2px solid rgba(255, 255, 255, 0.2);
            transition: transform 0.3s, box-shadow 0.3s;
        }

       

        .pixel-square {
            position: relative;
            overflow: hidden;
            background-color: rgba(0,0,0,0.2);
        }
        .pixel-image {
            position: absolute;
            inset: 0;
            background-size: 400% 400%;
            image-rendering: pixelated;
        }
        .pixel-overlay {
            position: absolute;
            inset: 0;
            background-color: rgba(46, 16, 101, 0.8);
            backdrop-filter: blur(2px);
            transition: opacity 0.3s ease-in-out;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
        }
        .pixel-overlay svg {
            width: 20px;
            height: 20px;
            opacity: 0.5;
        }

        #level-selection-grid {
            height: 250px;
            overflow-y: auto;
            scrollbar-width: thin;
            scrollbar-color: rgba(255,255,255,0.3) transparent;
        }

        #level-selection-grid::-webkit-scrollbar { width: 8px; }
        #level-selection-grid::-webkit-scrollbar-track { background: transparent; }
        #level-selection-grid::-webkit-scrollbar-thumb {
            background-color: rgba(255,255,255,0.3);
            border-radius: 10px;
        }

        #collection-grid {
            display: flex;
            justify-content: flex-start;
            overflow-x: auto;
            flex-wrap: nowrap;
            scrollbar-width: thin;
            scrollbar-color: rgba(255,255,255,0.3) transparent;
        }
        #collection-grid::-webkit-scrollbar { height: 8px; }
        #collection-grid::-webkit-scrollbar-track { background: transparent; }
        #collection-grid::-webkit-scrollbar-thumb {
            background-color: rgba(255,255,255,0.3);
            border-radius: 10px;
        }

        #collection-grid .collection-thumbnail {
            width: 80px;
            height: 80px;
            flex-shrink: 0;
            border-radius: 12px;
            border: 3px solid rgba(255,255,255,0.3);
            cursor: pointer;
            background-size: cover;
            background-position: center;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            position: relative;
            overflow: hidden;
        }
        #collection-grid .collection-thumbnail:hover {
            transform: scale(1.05);
            box-shadow: 0 0 15px rgba(167, 139, 250, 0.5);
        }
        .collection-thumbnail .progress-overlay {
            position: absolute;
            inset: 0;
            background: rgba(0,0,0,0.5);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: bold;
        }

        .flying-star {
            position: fixed;
            width: 25px;
            height: 25px;
            z-index: 100;
            pointer-events: none;
            background-color: #fde047; /* yellow-400 */
            clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
            transition: transform 0.7s cubic-bezier(0.5, 0, 0.9, 0.5), opacity 0.7s ease-out;
            filter: drop-shadow(0 0 15px #fef08a);
            will-change: transform, opacity;
            backface-visibility: hidden;
        }

        .toggle-bg:after {
            content: '';
            position: absolute;
            top: 2px;
            left: 2px;
            background-color: white;
            border: 1px solid #d1d5db; /* gray-300 */
            border-radius: 9999px;
            height: 1.25rem; /* 20px */
            width: 1.25rem;  /* 20px */
            transition: all 0.2s ease-in-out;
            box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
        }
        input:checked + .toggle-bg:after {
            transform: translateX(100%);
            border-color: white;
        }
        input:checked + .toggle-bg {
            background-color: #22c55e; /* green-500 */
        }

        .bottle-cover-img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            background-size: contain;
            background-position: center;
            background-repeat: no-repeat;
            z-index: 6;
            display: flex;
            justify-content: center;
            align-items: flex-start;
            opacity: 1;
            transform: translateY(0) scale(1);
        }

        .unlock-color-swatch {
            width: 25px;
            height: 25px;
            border-radius: 50%;
            border: 3px solid white;
            box-shadow: 0 2px 5px rgba(0,0,0,0.4);
            margin-top: 25%;
        }
       @media (min-width: 768px) {
            #pixel-art-container {
                width: 140px;
                height: 140px;
            }
        }
        @media screen and (max-height: 750px) {
				 :root {
			--bottle-width: 50px !important;
			--bottle-height: 146px !important;
			}
			#game-board {
				gap: 1rem 0.5rem !important; 
			}
			/* You can also add rules for the main menu here if needed */
			.menu-container h1 {
				font-size: 3rem; /* Example: Make title smaller */
			}
			#level-selection-grid {
				height: 200px; /* Example: Reduce grid height */
			}
        }
		@media screen and (max-height: 580px) {
				 :root {
			--bottle-width: 40px !important;
			--bottle-height: 117px !important;
			}
			#game-board {
				gap: 0.8rem 0.4rem !important; 
			}
			/* You can also add rules for the main menu here if needed */
			.menu-container h1 {
				font-size: 2rem; /* Example: Make title smaller */
			}
			#level-selection-grid {
				height: 160px; /* Example: Reduce grid height */
			}
			.flex.justify-center.w-full.space-x-2 img {
        width: 9vh !important;      /* Make them smaller relative to screen width */
        max-width: 60px !important; /* Lower the maximum size */
		}
				#collection-grid .collection-thumbnail {
			width: 65px !important;  /* Change from 80px */
			height: 65px !important; /* Change from 80px */
		}
			#pixel-art-container {
                width: 110px;
                height: 110px;
            }
        }
@media screen and (max-height: 479px) {
				 :root {
			--bottle-width: 36px !important;
			--bottle-height: 99px !important;
			}
	#select-level{
		display:none;
	}
			#game-board {
				gap: 0.8rem 0.4rem !important; 
			}
			/* You can also add rules for the main menu here if needed */
			.menu-container h1 {
				font-size: 2rem; /* Example: Make title smaller */
			}
			#level-selection-grid {
				height: 160px; /* Example: Reduce grid height */
				margin-top:10px;
			}
	.flex.justify-center.w-full.space-x-2 img {
        width: 8vh !important;      /* Make them smaller relative to screen width */
        max-width: 50px !important; /* Lower the maximum size */
    }
	#collection-grid .collection-thumbnail {
        width: 65px !important;  /* Change from 80px */
        height: 65px !important; /* Change from 80px */
    }
	#pixel-art-container {
                width: 90px;
                height: 90px;
            }
        }