body {
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #1a1e23;
}

.container {
    display: flex;
    gap: 60px;
}

/* O Copo */
.beaker {
    position: relative;
    width: 130px;
    height: 190px;
    background: rgba(255, 255, 255, 0.05);
    border: 6px solid rgba(255, 255, 255, 0.2);
    border-radius: 5px 5px 45px 45px; /* Menos arredondado no topo para encaixar a tampa */
    overflow: hidden; /* Mantém o líquido dentro */
    box-shadow: 0 20px 35px rgba(0, 0, 0, 0.4);
}

/* A TAMPA */
.cap {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 15px;
    background: rgba(255, 255, 255, 0.3); /* Cor da tampa */
    border-bottom: 2px solid rgba(0, 0, 0, 0.2);
    z-index: 20; /* Fica acima do líquido e do reflexo */
}

/* Reflexo no vidro */
.beaker::after {
    content: '';
    position: absolute;
    top: 30px;
    left: 12px;
    width: 10px;
    height: 60px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 5px;
    z-index: 10;
}

/* O Líquido */
.liquid {
    position: absolute;
    bottom: 0;
    width: 100%;
}

.cyan { 
    background-color: #41e0d0; 
    box-shadow: 0 -5px 15px rgba(65, 224, 208, 0.4);
}

.yellow { 
    background-color: #ffda00; 
    box-shadow: 0 -5px 15px rgba(255, 218, 0, 0.4);
}

/* Animações */
.anim-up { animation: move-up 4s ease-in-out infinite alternate; }
.anim-down { animation: move-down 4s ease-in-out infinite alternate; }

@keyframes move-up {
    0% { height: 10%; }
    100% { height: 92%; } /* Sobe quase até a tampa */
}

@keyframes move-down {
    0% { height: 92%; }
    100% { height: 10%; }
}