/* styles.css */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-color: #e0f7fa;
    color: #333;
}

.container {
    text-align: center;
    max-width: 400px;
    padding: 20px;
    border-radius: 10px;
    background-color: #ffffff;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    color: #00796b;
}

.water-visual {
    margin-top: 20px;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.cup {
    width: 100px;
    height: 150px;
    background-color: #b2ebf2;
    border: 2px solid #00796b;
    border-radius: 0 0 10px 10px;
    overflow: hidden;
    position: relative;
}

.water {
    position: absolute;
    bottom: 0;
    width: 100%;
    background-color: #4dd0e1;
    overflow: hidden;
    transition: height 0.3s ease;
}

.water::before,
.water::after {
    content: '';
    position: absolute;
    top: -10px;
    left: 0;
    width: 200%;
    height: 20px;
    background-color: rgba(0, 150, 136, 0.5);
    border-radius: 50%;
    opacity: 0.8;
    animation: wave 4s infinite linear alternate;
}

.water::after {
    top: -15px;
    opacity: 0.5;
    animation: wave 6s infinite linear alternate;
}

@keyframes wave {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}



.water-goal {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #ffffff;
    font-size: 1.2em;
    cursor: pointer;
    text-align: center;
}

#goal-input {
    font-size: 1em;
    width: 50px;
    text-align: center;
    border: none;
    background-color: transparent;
    color: #ffffff;
    outline: none;
    border-bottom: 1px solid #ffffff;
}

/* Remove arrows in Chrome, Safari, Edge, and Opera */
#goal-input::-webkit-outer-spin-button,
#goal-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Remove arrows in Firefox */
#goal-input[type=number] {
    -moz-appearance: textfield;
    appearance: textfield;
}

/* Remove arrows in Chrome, Safari, Edge, and Opera */
#custom-amount::-webkit-outer-spin-button,
#custom-amount::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Remove arrows in Firefox */
#custom-amount[type=number] {
    -moz-appearance: textfield;
    appearance: textfield;
}



#water-amount {
    font-size: 1.5em;
    color: #00796b;
    margin-top: 10px;
}

.form-group {
    margin-top: 20px;
}

button {
    background-color: #00796b;
    color: #ffffff;
    border: none;
    border-radius: 5px;
    padding: 10px 15px;
    margin: 5px;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.2s ease;
}

button:hover {
    background-color: #004d40;
}

input[type="number"] {
    padding: 10px;
    width: 70%;
    border: 2px solid #b2ebf2;
    border-radius: 5px;
    font-size: 1em;
    margin-right: 5px;
}

input[type="number"]:focus {
    outline: none;
    border-color: #00796b;
}

#custom-amount-button {
    padding: 10px 20px;
}