* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    width: 100%;
    position: relative;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

#container {
    height: 100%;
    width: 100%;
    position: relative;
    overflow: hidden;
}

#instruction {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 7%;
    font-family: "Croissant One", cursive;
    color: rgb(229, 52, 52);
    background: rgba(255,255,255,0.95);
    padding: 5px;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    backdrop-filter: blur(5px);
    border-bottom: 2px solid rgba(52, 152, 219, 0.3);
    transition: all 0.3s ease;
}

#instruction:hover {
    background: rgba(255,255,255,0.98);
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

#instruction h1 {
    font-size: 2.5vh;
    margin-bottom: 5px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
    color: #2c3e50;
}

#step {
    font-size: 2vh;
    font-family: "Croissant One", cursive;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
    color: #e74c3c;
    font-weight: 600;
    text-align: center;
    max-width: 90%;
    line-height: 1.3;
}

#backg {
    height: 93%;
    width: 100%;
    position: absolute;
    z-index: 1;
}

#lab {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(1.05) contrast(1.1);
}

#beaker {
    height: 93%;
    width: 100%;
    position: relative;
    z-index: 2;
}

#solution, #drop, #drop1, #fsolution, #fsolution1, #fsolution2, 
#machinelp, #machineup, #machineup1, #machineup2, #powerbtn, 
#mixedsol, #conicalflaskE1, #conicalflaskE2, #pippet, 
#organiclayer, #aquaslayer, #burette, #titrationFlask, 
#indicator, #baseSolution, #calculation, #indicatorDrop, 
#solutionClear, #solutionPink {
    visibility: hidden;
}

.hidden {
    visibility: hidden;
    opacity: 0;
    transition: all 0.3s ease;
}

.pour-drop {
    animation: dropAnimation 0.6s ease-in-out forwards;
}

@keyframes dropAnimation {
    0% { 
        opacity: 0; 
        transform: translateY(0) scale(1); 
    }
    50% { 
        opacity: 1; 
        transform: translateY(60%) scale(1.1); 
    }
    100% { 
        opacity: 0.8; 
        transform: translateY(120%) scale(1); 
    }
}

#gcylinder {
    height: 25%;
    width: 4.5%;
    position: absolute;
    left: 52%;
    top: 52%;
    transition: all 1.53s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: pointer;
    z-index: 4;
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.2));
}

#gcylinder:hover {
    transform: scale(1.05);
    filter: drop-shadow(3px 3px 6px rgba(0,0,0,0.3));
}

#beaker1_butanol, #acetic, #water {
    height: 20%;
    width: 7.25%;
    position: absolute;
    top: 55%;
    transition: all 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: pointer;
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.2));
}

#beaker1_butanol:hover, #acetic:hover, #water:hover {
    transform: scale(1.05) translateY(-2px);
    filter: drop-shadow(3px 3px 8px rgba(0,0,0,0.25));
}

#beaker1_butanol { left: 59%; }
#acetic { left: 67%; }
#water { left: 75%; }

#flask {
    height: 53%;
    width: 15%;
    position: absolute;
    left: 25%;
    top: 25%;
    z-index: 5;
    filter: drop-shadow(3px 3px 6px rgba(0,0,0,0.2));
}

#drop, #drop1 {
    height: 12%;
    width: 4%;
    position: absolute;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 10;
    filter: drop-shadow(1px 1px 3px rgba(0,0,0,0.3));
}

#drop { 
    left: 52.5%; 
    bottom: 42%; 
}

#drop1 { 
    left: 32%; 
    bottom: 70%; 
}

#wash-water, #wash-stream {
    height: 8%;
    width: 3%;
    position: absolute;
    transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 15;
    visibility: hidden;
    opacity: 0.85;
}

#wash-water {
    left: 54%;
    top: 30%;
    transform: scale(1.2);
    background: radial-gradient(circle, rgba(135, 206, 235, 0.95) 0%, rgba(173, 216, 230, 0.8) 50%, rgba(135, 206, 235, 0.6) 100%);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(135, 206, 235, 0.4);
}

#wash-stream {
    left: 53.5%;
    top: 38%;
    width: 1.5%;
    height: 25%;
    transform: scaleX(0.6);
    background: linear-gradient(to bottom, 
        rgba(135, 206, 235, 0.95) 0%,
        rgba(135, 206, 235, 0.8) 30%,
        rgba(135, 206, 235, 0.6) 60%,
        rgba(135, 206, 235, 0.4) 80%,
        rgba(135, 206, 235, 0.2) 100%);
    border-radius: 3px;
    box-shadow: 0 0 6px rgba(135, 206, 235, 0.3);
}

@keyframes washFlow {
    0% { 
        opacity: 0;
        transform: translateY(-12px) scale(0.8);
        filter: blur(1px);
    }
    20% { 
        opacity: 0.9;
        transform: translateY(-2px) scale(1.1);
        filter: blur(0px);
    }
    50% { 
        opacity: 1;
        transform: translateY(3px) scale(1.2);
        filter: blur(0px);
    }
    80% { 
        opacity: 0.8;
        transform: translateY(8px) scale(1);
        filter: blur(0.5px);
    }
    100% { 
        opacity: 0.3;
        transform: translateY(12px) scale(0.9);
        filter: blur(1px);
    }
}

@keyframes streamFlow {
    0% { 
        opacity: 0;
        height: 0%;
        transform: scaleX(0.2) scaleY(0);
        filter: blur(2px);
    }
    30% { 
        opacity: 0.8;
        height: 15%;
        transform: scaleX(0.6) scaleY(1);
        filter: blur(0px);
    }
    70% { 
        opacity: 0.95;
        height: 25%;
        transform: scaleX(0.8) scaleY(1);
        filter: blur(0px);
    }
    100% { 
        opacity: 0.6;
        height: 22%;
        transform: scaleX(0.5) scaleY(1);
        filter: blur(0.5px);
    }
}

@keyframes cylinderWash {
    0% { 
        filter: brightness(1) contrast(1);
        box-shadow: none;
    }
    50% { 
        filter: brightness(1.15) contrast(1.1);
        box-shadow: 0 0 15px rgba(135, 206, 235, 0.6), inset 0 0 10px rgba(135, 206, 235, 0.3);
    }
    100% { 
        filter: brightness(1) contrast(1);
        box-shadow: none;
    }
}

.wash-animation {
    animation: washFlow 2s ease-in-out infinite;
}

.stream-animation {
    animation: streamFlow 2s ease-in-out infinite;
}

.cylinder-wash-effect {
    animation: cylinderWash 2s ease-in-out infinite;
}

@keyframes layerSeparation {
    0% { 
        opacity: 0; 
        transform: translateY(25px) scale(0.8) rotateY(10deg);
        filter: blur(2px);
    }
    50% { 
        opacity: 0.7; 
        transform: translateY(-8px) scale(1.08) rotateY(0deg);
        filter: blur(0px);
    }
    100% { 
        opacity: 1; 
        transform: translateY(0) scale(1) rotateY(0deg);
        filter: blur(0px);
    }
}

@keyframes pipetteExtraction {
    0% { 
        transform: rotate(0deg) translateY(0) scale(1);
    }
    25% { 
        transform: rotate(-12deg) translateY(-12px) scale(1.02);
    }
    50% { 
        transform: rotate(6deg) translateY(-6px) scale(1.05);
    }
    75% { 
        transform: rotate(-6deg) translateY(-10px) scale(1.02);
    }
    100% { 
        transform: rotate(0deg) translateY(0) scale(1);
    }
}

@keyframes pipetteMotion {
    0% {
        transform: translateX(0) translateY(0) rotate(0deg) scale(1);
        filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.2));
    }
    20% {
        transform: translateX(8%) translateY(-10%) rotate(-15deg) scale(1.05);
        filter: drop-shadow(0 0 8px rgba(52, 152, 219, 0.4));
    }
    40% {
        transform: translateX(16%) translateY(-20%) rotate(-25deg) scale(1.1);
        filter: drop-shadow(0 0 10px rgba(52, 152, 219, 0.5));
    }
    60% {
        transform: translateX(24%) translateY(-35%) rotate(-40deg) scale(1.2);
        filter: drop-shadow(0 0 12px rgba(52, 152, 219, 0.6));
    }
    80% {
        transform: translateX(28%) translateY(-45%) rotate(-50deg) scale(1.3);
        filter: drop-shadow(0 0 15px rgba(52, 152, 219, 0.7));
    }
    100% {
        transform: translateX(32%) translateY(-52%) rotate(-60deg) scale(1.5);
        filter: drop-shadow(0 0 20px rgba(52, 152, 219, 0.9));
    }
}

@keyframes indicatorDrop {
    0% { 
        opacity: 0; 
        transform: translateY(-35px) scale(0.4) rotate(0deg);
        filter: blur(1px);
    }
    30% { 
        opacity: 0.8; 
        transform: translateY(-10px) scale(0.8) rotate(180deg);
        filter: blur(0px);
    }
    60% { 
        opacity: 1; 
        transform: translateY(0) scale(1.2) rotate(360deg);
        filter: blur(0px);
    }
    100% { 
        opacity: 0.7; 
        transform: translateY(8px) scale(1) rotate(360deg);
        filter: blur(0px);
    }
}

@keyframes activatorDropFall {
    0% { 
        opacity: 0; 
        transform: translateY(-50px) scale(0.3) rotate(0deg);
        filter: blur(2px);
    }
    20% { 
        opacity: 0.9; 
        transform: translateY(-30px) scale(0.6) rotate(90deg);
        filter: blur(1px);
    }
    40% { 
        opacity: 1; 
        transform: translateY(-10px) scale(0.8) rotate(180deg);
        filter: blur(0px);
    }
    60% { 
        opacity: 1; 
        transform: translateY(0) scale(1) rotate(270deg);
        filter: blur(0px);
    }
    80% { 
        opacity: 0.8; 
        transform: translateY(10px) scale(1.1) rotate(360deg);
        filter: blur(0px);
    }
    100% { 
        opacity: 0; 
        transform: translateY(20px) scale(0.8) rotate(360deg);
        filter: blur(1px);
    }
}

@keyframes drop1Fall {
    0% { 
        opacity: 0; 
        transform: translateY(-60px) scale(0.2) rotate(0deg);
        filter: blur(3px);
    }
    25% { 
        opacity: 0.8; 
        transform: translateY(-40px) scale(0.5) rotate(90deg);
        filter: blur(2px);
    }
    50% { 
        opacity: 1; 
        transform: translateY(-20px) scale(0.8) rotate(180deg);
        filter: blur(1px);
    }
    75% { 
        opacity: 1; 
        transform: translateY(0) scale(1) rotate(270deg);
        filter: blur(0px);
    }
    100% { 
        opacity: 0; 
        transform: translateY(30px) scale(0.6) rotate(360deg);
        filter: blur(1px);
    }
}

@keyframes flaskMoveToBurette {
    0% {
        transform: translateX(0) translateY(0);
        filter: brightness(1);
    }
    50% {
        transform: translateX(0) translateY(10%);
        filter: brightness(1.1) drop-shadow(0 0 8px rgba(52, 152, 219, 0.4));
    }
    100% {
        transform: translateX(0) translateY(10%);
        filter: brightness(1.05) drop-shadow(0 0 5px rgba(52, 152, 219, 0.3));
    }
}

@keyframes flaskMoveToBurette2 {
    0% {
        transform: translateX(0) translateY(0);
        filter: brightness(1);
    }
    50% {
        transform: translateX(0) translateY(10%);
        filter: brightness(1.1) drop-shadow(0 0 8px rgba(52, 152, 219, 0.4));
    }
    100% {
        transform: translateX(0) translateY(10%);
        filter: brightness(1.05) drop-shadow(0 0 5px rgba(52, 152, 219, 0.3));
    }
}

@keyframes baseReturn {
    0% {
        transform: translateX(0) translateY(0);
        filter: brightness(1);
    }
    50% {
        transform: translateX(0) translateY(-10%);
        filter: brightness(1.1) drop-shadow(0 0 8px rgba(52, 152, 219, 0.4));
    }
    100% {
        transform: translateX(0) translateY(-10%);
        filter: brightness(1.05) drop-shadow(0 0 5px rgba(52, 152, 219, 0.3));
    }
}

@keyframes baseReturn2 {
    0% {
        transform: translateX(0) translateY(0);
        filter: brightness(1);
    }
    50% {
        transform: translateX(0) translateY(-10%);
        filter: brightness(1.1) drop-shadow(0 0 8px rgba(52, 152, 219, 0.4));
    }
    100% {
        transform: translateX(0) translateY(-10%);
        filter: brightness(1.05) drop-shadow(0 0 5px rgba(52, 152, 219, 0.3));
    }
}

@keyframes dropToFlask {
    0% {
        opacity: 0;
        transform: translateY(0) scale(0.5);
        filter: blur(2px);
    }
    30% {
        opacity: 0.8;
        transform: translateY(30px) scale(0.8);
        filter: blur(1px);
    }
    60% {
        opacity: 1;
        transform: translateY(60px) scale(1);
        filter: blur(0px);
    }
    100% {
        opacity: 0;
        transform: translateY(80px) scale(0.8);
        filter: blur(1px);
    }
}

@keyframes flaskShake {
    0% { 
        transform: translateX(0) rotate(0deg);
    }
    10% { 
        transform: translateX(-2px) rotate(-1deg);
    }
    20% { 
        transform: translateX(2px) rotate(1deg);
    }
    30% { 
        transform: translateX(-2px) rotate(-1deg);
    }
    40% { 
        transform: translateX(2px) rotate(1deg);
    }
    50% { 
        transform: translateX(-1px) rotate(-0.5deg);
    }
    60% { 
        transform: translateX(1px) rotate(0.5deg);
    }
    70% { 
        transform: translateX(-1px) rotate(-0.5deg);
    }
    80% { 
        transform: translateX(1px) rotate(0.5deg);
    }
    90% { 
        transform: translateX(-0.5px) rotate(-0.25deg);
    }
    100% { 
        transform: translateX(0) rotate(0deg);
    }
}

@keyframes extractionStream {
    0% { 
        opacity: 0; 
        transform: translateY(0) scale(0.5);
        filter: blur(1px);
    }
    30% { 
        opacity: 0.8; 
        transform: translateY(-10px) scale(1);
        filter: blur(0px);
    }
    60% { 
        opacity: 1; 
        transform: translateY(-20px) scale(1.1);
        filter: blur(0px);
    }
    100% { 
        opacity: 0; 
        transform: translateY(-30px) scale(0.8);
        filter: blur(1px);
    }
}

@keyframes realisticExtractionStream {
    0% { 
        opacity: 0; 
        transform: translateY(0) scale(0.3);
        filter: blur(2px);
    }
    20% { 
        opacity: 0.6; 
        transform: translateY(-15px) scale(0.8);
        filter: blur(1px);
    }
    50% { 
        opacity: 1; 
        transform: translateY(-35px) scale(1.2);
        filter: blur(0px);
    }
    80% { 
        opacity: 0.8; 
        transform: translateY(-50px) scale(1);
        filter: blur(0px);
    }
    100% { 
        opacity: 0; 
        transform: translateY(-65px) scale(0.6);
        filter: blur(1px);
    }
}

@keyframes suctionEffect {
    0% { 
        opacity: 0; 
        transform: scale(0.5);
        filter: blur(1px);
    }
    30% { 
        opacity: 0.8; 
        transform: scale(1.2);
        filter: blur(0px);
    }
    70% { 
        opacity: 1; 
        transform: scale(1.5);
        filter: blur(0px);
    }
    100% { 
        opacity: 0; 
        transform: scale(0.8);
        filter: blur(1px);
    }
}

@keyframes titrationBubble {
    0% { 
        opacity: 0; 
        transform: scale(0.3) translateY(0);
        filter: blur(1px);
    }
    30% { 
        opacity: 0.6; 
        transform: scale(0.8) translateY(-5px);
        filter: blur(0px);
    }
    60% { 
        opacity: 0.9; 
        transform: scale(1.3) translateY(-12px);
        filter: blur(0px);
    }
    100% { 
        opacity: 0; 
        transform: scale(1.6) translateY(-25px);
        filter: blur(1px);
    }
}

@keyframes colorChange {
    0% { 
        filter: hue-rotate(0deg) brightness(1) saturate(1);
    }
    25% { 
        filter: hue-rotate(90deg) brightness(1.1) saturate(1.2);
    }
    50% { 
        filter: hue-rotate(180deg) brightness(1.25) saturate(1.4);
    }
    75% { 
        filter: hue-rotate(270deg) brightness(1.1) saturate(1.2);
    }
    100% { 
        filter: hue-rotate(360deg) brightness(1) saturate(1);
    }
}

@keyframes calculationGlow {
    0% { 
        box-shadow: 0 0 8px rgba(52, 152, 219, 0.4);
        transform: scale(1);
        border: 2px solid rgba(52, 152, 219, 0.3);
    }
    50% { 
        box-shadow: 0 0 25px rgba(52, 152, 219, 0.8), 0 0 40px rgba(52, 152, 219, 0.4);
        transform: scale(1.03);
        border: 2px solid rgba(52, 152, 219, 0.7);
    }
    100% { 
        box-shadow: 0 0 8px rgba(52, 152, 219, 0.4);
        transform: scale(1);
        border: 2px solid rgba(52, 152, 219, 0.3);
    }
}

@keyframes numberCount {
    0% { 
        opacity: 0; 
        transform: translateY(15px) scale(0.8);
        filter: blur(1px);
    }
    60% { 
        opacity: 0.8; 
        transform: translateY(-3px) scale(1.1);
        filter: blur(0px);
    }
    100% { 
        opacity: 1; 
        transform: translateY(0) scale(1);
        filter: blur(0px);
    }
}

.separation-animation {
    animation: layerSeparation 1.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.pipette-animation {
    animation: pipetteExtraction 2.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.indicator-animation {
    animation: indicatorDrop 1.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.titration-animation {
    animation: titrationBubble 1s ease-out infinite;
}

.color-change-animation {
    animation: colorChange 3.5s ease-in-out;
}

.calculation-animation {
    animation: calculationGlow 2.5s ease-in-out infinite;
}

.number-animation {
    animation: numberCount 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

#solution {
    height: 5%;
    width: 2.5%;
    position: absolute;
    left: 53%;
    top: 71%;
    transition: all 1.58s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 5;
    filter: drop-shadow(1px 1px 3px rgba(0,0,0,0.2));
}

#fsolution, #fsolution1, #fsolution2 {
    height: 2%;
    width: 3%;
    position: absolute;
    left: 32%;
    transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 5;
    filter: drop-shadow(1px 1px 2px rgba(0,0,0,0.2));
}

#fsolution { top: 42%; }
#fsolution1 { top: 41%; }
#fsolution2 { top: 40%; }

#machinelp {
    height: 40%;
    width: 20%;
    position: absolute;
    left: 30%;
    top: 30%;
    z-index: 3;
    filter: drop-shadow(3px 3px 8px rgba(0,0,0,0.25));
}

#machineup, #machineup1, #machineup2 {
    height: 15%;
    width: 20%;
    position: absolute;
    left: 30%;
    top: 30%;
    z-index: 4;
    filter: drop-shadow(2px 2px 6px rgba(0,0,0,0.2));
}

#powerbtn {
    height: 5%;
    width: 3%;
    position: absolute;
    left: 45%;
    top: 60%;
    cursor: pointer;
    z-index: 10;
    transition: all 0.2s ease;
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.3));
}

#powerbtn:hover {
    transform: scale(1.1);
    filter: drop-shadow(3px 3px 6px rgba(0,0,0,0.4));
}

#powerbtn:active {
    transform: scale(0.95);
}

@keyframes shake {
    0% { transform: rotate(0deg) translateX(0); }
    10% { transform: rotate(2deg) translateX(2px); }
    20% { transform: rotate(-2deg) translateX(-2px); }
    30% { transform: rotate(3deg) translateX(1px); }
    40% { transform: rotate(-1deg) translateX(-1px); }
    50% { transform: rotate(2deg) translateX(2px); }
    60% { transform: rotate(-3deg) translateX(-1px); }
    70% { transform: rotate(1deg) translateX(1px); }
    80% { transform: rotate(-2deg) translateX(-2px); }
    90% { transform: rotate(2deg) translateX(1px); }
    100% { transform: rotate(0deg) translateX(0); }
}

.shake {
    animation: shake 0.5s ease-in-out infinite;
}


#mixedsol {
    height: 25%;
    width: 6%;
    position: absolute;
    left: 39%;
    top: 52%;
    z-index: 6;
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.2));
}

#conicalflaskE1, #conicalflaskE2 {
    height: 20vh;
    width: 5vw;
    position: absolute;
    top: 54%;
    z-index: 6;
    transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    filter: drop-shadow(2px 2px 5px rgba(0,0,0,0.2));
}

#conicalflaskE1:hover, #conicalflaskE2:hover {
    transform: scale(1.02);
}

#conicalflaskE1 { left: 79%; }
#conicalflaskE2 { left: 79%; }

#pippet {
    height: 2vh;
    width: 15vw;
    position: absolute;
    left: 18%;
    bottom: 25%;
    transition: all 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 10;
    cursor: pointer;
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.2));
}

#pippet:hover {
    transform: scale(1.05);
}

#indicator {
    height: 10%;
    width: 5%;
    position: absolute;
    left: 20%;
    top: 55%;
    cursor: pointer;
    z-index: 10;
    visibility: visible;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.2));
}

#indicator:hover {
    transform: scale(1.08) translateY(-2px);
    filter: drop-shadow(3px 3px 6px rgba(0,0,0,0.3));
}

#indicatorDrop {
    height: 12%;
    width: 4%;
    position: absolute;
    left: 38%;
    top: 65%;
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 10;
}

#organiclayer, #aquaslayer {
    height: 3vh;
    width: 5vw;
    position: absolute;
    top: 73%;
    z-index: 7;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-radius: 3px;
    filter: drop-shadow(1px 1px 3px rgba(0,0,0,0.2));
}

#organiclayer { 
    left: 79%; 
    background: linear-gradient(180deg, rgba(255,165,0,0.7) 0%, rgba(255,140,0,0.5) 100%);
}

#aquaslayer { 
    left: 79%; 
    background: linear-gradient(180deg, rgba(135,206,235,0.7) 0%, rgba(100,149,237,0.5) 100%);
}

#burette {
    height: 25%;
    width: 8%;
    position: absolute;
    left: 79%;
    top: 56%;
    z-index: 10;
    transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    filter: drop-shadow(2px 2px 5px rgba(0,0,0,0.2));
    cursor: pointer;
}

#titrationFlask {
    height: 15%;
    width: 8%;
    position: absolute;
    left: 45%;
    top: 60%;
    z-index: 8;
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.2));
}

#baseSolution {
    height: 10%;
    width: 5%;
    position: absolute;
    left: 30%;
    top: 20%;
    z-index: 5;
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.2));
}

#progress-container {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 60px;
    top: 8%;
    background: rgba(255,255,255,0.95);
    padding: 15px;
    border-radius: 10px;
    z-index: 200;
    display: none;
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.3);
    animation: slideInFromTop 0.5s ease-out;
}

@keyframes slideInFromTop {
    0% {
        transform: translateX(-50%) translateY(-20px);
        opacity: 0;
    }
    100% {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}

#progress-bar {
    height: 25px;
    background: linear-gradient(90deg, #4CAF50 0%, #45a049 100%);
    width: 0%;
    transition: width 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(76,175,80,0.3);
}

#progress-text {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 14px;
    font-weight: 500;
    margin-top: 8px;
    text-align: center;
    color: #2c3e50;
}

#calculation {
    position: absolute;
    left: 58%;
    top: 8%;
    background: rgba(255,255,255,0.98);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
    z-index: 999;
    display: none;
    backdrop-filter: blur(15px);
    border: 2px solid rgba(52, 152, 219, 0.3);
    min-width: 300px;
}

#calculation h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    border-bottom: 2px solid #3498db;
    padding-bottom: 8px;
}

#calculation p {
    margin: 8px 0;
    font-size: 15px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #34495e;
    font-weight: 500;
}

#calculation button {
    margin-top: 15px;
    padding: 10px 20px;
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

#calculation button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(52, 152, 219, 0.4);
}

#wash-btn {
    position: fixed;
    height: 5%;
    width: 6%;
    border-radius: 15px;
    bottom: 8%;
    left: 76%;
    background: linear-gradient(135deg, hsl(200, 80%, 77%) 0%, hsl(200, 70%, 65%) 100%);
    color: white;
    box-shadow: 0 6px 15px rgba(65, 65, 65, 0.3);
    font-weight: 600;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    border: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 1000;
    backdrop-filter: blur(5px);
    border: 2px solid rgba(255,255,255,0.2);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#wash-btn:hover {
    background: linear-gradient(135deg, hsl(200, 80%, 67%) 0%, hsl(200, 70%, 55%) 100%);
    transform: scale(1.08) translateY(-2px);
    box-shadow: 0 8px 20px rgba(65, 65, 65, 0.4);
}

#wash-btn:active {
    transform: scale(0.95) translateY(0);
    box-shadow: 0 4px 10px rgba(65, 65, 65, 0.3);
}

#next {
    position: fixed;
    height: 5%;
    width: 6%;
    border-radius: 15px;
    bottom: 8%;
    left: 84%;
    background: linear-gradient(135deg, hsl(287, 80%, 77%) 0%, hsl(287, 70%, 65%) 100%);
    color: white;
    box-shadow: 0 6px 15px rgba(65, 65, 65, 0.3);
    font-weight: 600;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    border: none;
    cursor: pointer;
    z-index: 100;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    backdrop-filter: blur(5px);
    border: 2px solid rgba(255,255,255,0.2);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#next:hover {
    background: linear-gradient(135deg, hsl(287, 80%, 67%) 0%, hsl(287, 70%, 55%) 100%);
    transform: scale(1.08) translateY(-2px);
    box-shadow: 0 8px 20px rgba(65, 65, 65, 0.4);
}

#next:active {
    transform: scale(0.95) translateY(0);
    box-shadow: 0 4px 10px rgba(65, 65, 65, 0.3);
}

@keyframes dropAnimation {
    0% { 
        transform: translateY(0) scale(1); 
        opacity: 1; 
    }
    50% { 
        transform: translateY(40px) scale(1.1); 
        opacity: 0.8; 
    }
    100% { 
        transform: translateY(80px) scale(0.9); 
        opacity: 0; 
    }
}

.animate-drop {
    animation: dropAnimation 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

#indicator {
    height: 8%;
    width: 4%;
    position: absolute;
    left: 22%;
    top: 57%;
    cursor: pointer;
    z-index: 12;
    visibility: visible;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

#indicatorDrop {
    height: 3%;
    width: 2%;
    position: absolute;
    left: 38%;
    top: 62%;
    z-index: 12;
    visibility: hidden;
    filter: drop-shadow(1px 1px 3px rgba(0,0,0,0.3));
}

#solutionClear, #solutionPink {
    position: absolute;
    height: 15%;
    width: 5%;
    left: 47%;
    top: 64%;
    z-index: 15;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-radius: 8px;
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.2));
}

/* Enhanced UI transitions for better visual feedback */
.transition-phase {
    transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.phase-complete {
    animation: phaseComplete 0.6s ease-out;
}

@keyframes phaseComplete {
    0% { 
        transform: scale(1);
        filter: brightness(1);
    }
    50% { 
        transform: scale(1.05);
        filter: brightness(1.2) drop-shadow(0 0 10px rgba(52, 152, 219, 0.6));
    }
    100% { 
        transform: scale(1);
        filter: brightness(1);
    }
}

/* Enhanced machine animations */
.machine-transition {
    transition: all 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.solution-transfer {
    animation: solutionTransfer 1.5s ease-in-out;
}

@keyframes solutionTransfer {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    50% {
        transform: translate(-200%, -100%) scale(0.8);
        opacity: 0.7;
    }
    100% {
        transform: translate(-290%, -100%) scale(0.6);
        opacity: 0.3;
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
        filter: brightness(1);
    }
    50% {
        transform: scale(1.05);
        filter: brightness(1.2) drop-shadow(0 0 8px rgba(52, 152, 219, 0.6));
    }
    100% {
        transform: scale(1);
        filter: brightness(1);
    }
}

@keyframes floating {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    25% {
        transform: translateY(-5px) rotate(1deg);
    }
    50% {
        transform: translateY(-10px) rotate(0deg);
    }
    75% {
        transform: translateY(-5px) rotate(-1deg);
    }
}

@keyframes glowPulse {
    0% {
        box-shadow: 0 0 5px rgba(52, 152, 219, 0.5);
        filter: brightness(1);
    }
    50% {
        box-shadow: 0 0 20px rgba(52, 152, 219, 0.8), 0 0 30px rgba(52, 152, 219, 0.6);
        filter: brightness(1.1);
    }
    100% {
        box-shadow: 0 0 5px rgba(52, 152, 219, 0.5);
        filter: brightness(1);
    }
}

@keyframes particleFloat {
    0% {
        transform: translateY(0) translateX(0) scale(1);
        opacity: 1;
    }
    50% {
        transform: translateY(-20px) translateX(10px) scale(1.2);
        opacity: 0.7;
    }
    100% {
        transform: translateY(-40px) translateX(-10px) scale(0.8);
        opacity: 0;
    }
}

@keyframes sparkle {
    0%, 100% {
        transform: scale(0) rotate(0deg);
        opacity: 0;
    }
    50% {
        transform: scale(1) rotate(180deg);
        opacity: 1;
    }
}

@keyframes liquidFlow {
    0% {
        transform: translateY(0) scaleY(1);
        filter: hue-rotate(0deg);
    }
    25% {
        transform: translateY(5px) scaleY(1.1);
        filter: hue-rotate(90deg);
    }
    50% {
        transform: translateY(10px) scaleY(1.2);
        filter: hue-rotate(180deg);
    }
    75% {
        transform: translateY(5px) scaleY(1.1);
        filter: hue-rotate(270deg);
    }
    100% {
        transform: translateY(0) scaleY(1);
        filter: hue-rotate(360deg);
    }
}

@keyframes magneticAttraction {
    0% {
        transform: translateX(0) scale(1);
    }
    25% {
        transform: translateX(-5px) scale(1.05);
    }
    50% {
        transform: translateX(-10px) scale(1.1);
    }
    75% {
        transform: translateX(-5px) scale(1.05);
    }
    100% {
        transform: translateX(0) scale(1);
    }
}

@keyframes quantumShift {
    0% {
        transform: scale(1);
        filter: brightness(1);
    }
    50% {
        transform: scale(1.05);
        filter: brightness(1.1);
    }
    100% {
        transform: scale(1);
        filter: brightness(1);
    }
}

@keyframes holographicEffect {
    0% {
        filter: brightness(1);
        box-shadow: 0 0 10px rgba(52, 152, 219, 0.5);
    }
    50% {
        filter: brightness(1.1);
        box-shadow: 0 0 15px rgba(52, 152, 219, 0.7);
    }
    100% {
        filter: brightness(1);
        box-shadow: 0 0 10px rgba(52, 152, 219, 0.5);
    }
}

@keyframes fadeInScale {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInFromBottom {
    0% {
        transform: translateY(20px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

#voice-toggle {
    position: fixed;
    height: 5%;
    width: 8%;
    border-radius: 15px;
    bottom: 8%;
    left: 66%;
    background: linear-gradient(135deg, hsl(120, 80%, 77%) 0%, hsl(120, 70%, 65%) 100%);
    color: white;
    box-shadow: 0 6px 15px rgba(65, 65, 65, 0.3);
    font-weight: 600;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    border: none;
    cursor: pointer;
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    backdrop-filter: blur(5px);
    border: 2px solid rgba(255,255,255,0.2);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

#voice-toggle:hover {
    background: linear-gradient(135deg, hsl(120, 80%, 67%) 0%, hsl(120, 70%, 55%) 100%);
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 8px 20px rgba(65, 65, 65, 0.4);
}

#voice-toggle:active {
    transform: scale(0.95) translateY(0);
    box-shadow: 0 4px 10px rgba(65, 65, 65, 0.3);
}

#activatorbottelimage {
    transition: all;
    width: 4%;
    height: 15%;
    top: 56%;
    left: 79%;
    position: absolute;
    visibility: visible;
    cursor: pointer;
    z-index: 10;
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.2));
}

#activatordroperimage {
    transition: all;
    width: 4%;
    height: 15%;
    top: 49%;
    left: 79%;
    position: absolute;
    visibility: visible;
    cursor: pointer;
    z-index: 11;
    filter: drop-shadow(1px 1px 3px rgba(0,0,0,0.3));
}

/* New titration system styles */
#uu1 {
    width: 3%;
    height: 5%;
    left: 21%;
    top: 70%;
    position: absolute;
    font-size: 2vw;
    color: rgb(7, 7, 7);
    background-color: rgb(226, 223, 6);
    visibility: hidden;
    z-index: 20;
}

#uu2 {
    width: 3%;
    height: 5%;
    left: 28%;
    top: 70%;
    position: absolute;
    font-size: 2vw;
    color: rgb(7, 7, 7);
    background-color: rgb(226, 223, 6);
    visibility: hidden;
    z-index: 20;
}

#brstand5f {
    position: absolute;
    height: 55vh;
    width: 16vw;
    left: 57%;
    top: 12%;
    visibility: hidden;
    z-index: 15;
}

#f1 {
    cursor: pointer;
    transition: all;
    transition-duration: 1s;
    position: absolute;
    height: 14vh;
    width: 4.9vw;
    left: 20.5%;
    top: 56%;
    visibility: hidden;
    z-index: 16;
}

#f2 {
    cursor: pointer;
    transition: all;
    transition-duration: 1s;
    position: absolute;
    height: 14vh;
    width: 4.9vw;
    left: 27%;
    top: 56%;
    visibility: hidden;
    z-index: 16;
}

#knob5f {
    height: 2vh;
    width: 2vw;
    position: absolute;
    right: 31%;
    top: 43%;
    cursor: pointer;
    visibility: hidden;
    z-index: 17;
}

#droptaitration {
    height: 2vh;
    width: 1vw;
    position: absolute;
    right: 32.6%;
    top: 52.5%;
    transition: all;
    transition-duration: 1s;
    visibility: hidden;
    z-index: 18;
}

#p1 {
    cursor: pointer;
    transition: all 2s ease-in-out;
    position: absolute;
    height: 14vh;
    width: 5vw;
    left: 64.2%;
    top: 56%;
    visibility: hidden;
    opacity: 0%;
    z-index: 19;
}

#p2 {
    cursor: pointer;
    transition: all 2s ease-in-out;
    position: absolute;
    height: 14vh;
    width: 5vw;
    left: 64.2%;
    top: 56%;
    visibility: hidden;
    opacity: 0%;
    z-index: 19;
}

@keyframes flask-shake {
    0%   { transform: rotate(0deg) translate(0, 0); }
    10%  { transform: rotate(5deg) translate(2px, -2px); }
    20%  { transform: rotate(-5deg) translate(-2px, 2px); }
    30%  { transform: rotate(7deg) translate(3px, -2px); }
    40%  { transform: rotate(-7deg) translate(-3px, 2px); }
    50%  { transform: rotate(4deg) translate(2px, -1px); }
    60%  { transform: rotate(-4deg) translate(-2px, 1px); }
    70%  { transform: rotate(2deg) translate(1px, -1px); }
    80%  { transform: rotate(-2px, 1px); }
    90%  { transform: rotate(1deg) translate(0.5px, -0.5px); }
    100% { transform: rotate(0deg) translate(0, 0); }
}

.flask-shake {
    animation: flask-shake 1.2s ease-in-out;
}

/* New phenolphthalein dropper system styles */
#s1, #s2 {
    width: 3%;
    height: 5%;
    position: absolute;
    font-size: 2vw;
    color: rgb(7, 7, 7);
    background-color: rgb(226, 223, 6);
    visibility: hidden;
    z-index: 25;
}

#s1 {
    left: 21%;
    top: 70%;
}

#s2 {
    left: 30%;
    top: 70%;
}

#vflk1, #vflk2 {
    width: 7%;
    height: 20%;
    position: absolute;
    visibility: hidden;
    transition: all;
    z-index: 24;
}

#vflk1 {
    left: 19%;
    top: 49%;
}

#vflk2 {
    left: 29%;
    top: 49%;
}

#act12 {
    width: 3%;
    height: 13%;
    left: 60%;
    top: 58%;
    position: absolute;
    transition: all;
    visibility: hidden;
    transition-duration: 2s;
    z-index: 26;
}

#activaterdroper {
    width: 3%;
    height: 13%;
    left: 60%;
    top: 52%;
    position: absolute;
    transition: all;
    transition-duration: 2s;
    visibility: hidden;
    z-index: 27;
}

#drop0, #drop1 {
    width: 2%;
    height: 4%;
    position: absolute;
    transition: all;
    scale: 0.9;
    visibility: hidden;
    transition-duration: 1.5s;
    z-index: 28;
}

#drop0 {
    left: 21.1%;
    top: 40%;
}

#drop1 {
    left: 31.1%;
    top: 40%;
}