/* CSS for design and animations */

body {
    position: relative; 
    --nodes-size: 70px;
}

/* linked list */

section.list {
    width: 95%;
    padding-left: 5%;
    padding-top: 40px;
    padding-bottom: 35px;
    margin-bottom: 0;
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
}

section.list > div {
    flex: 0 0 auto;
    display: inline-block;
    vertical-align: top;
}

/* nodes */

div.node {
    background:#8900e8;
    width: var(--nodes-size);
    height: var(--nodes-size);
    text-align: center;
    border-radius: 50%;
}

@keyframes grow {
    0% {
        transform: scale(0);
    }
    80% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes highlightNode {
    50% {
        transform: scale(1.3);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes deleteNode {
    50% {
        transform: scale(1.3);
    }
    100% {
        transform: scale(0);
    }
}

@keyframes moveLeftNode{
    0%{
        transform: translateX(200%);
    }
    70%{
        transform: translateX(250%);
    }
    100%{
        transform: translateX(0%);
    }
}

@keyframes moveRightNode{
    50%{
        transform: translateX(250%);
    }
    100%{
        transform: translateX(200%);

    }
}

/* numbers (in node) */

div.node p.number {
    margin: 0;
    line-height: var(--nodes-size);
    font-family: 'Oswald', sans-serif;
    font-size: 1.6rem;
    font-weight: bold;
    color: #fff;
}

@keyframes fadeNumberOut {
    70% {
        transform: scale(1.7);
    }
    100% {
        transform: scale(0);
    }
}

@keyframes fadeNumberIn {
    0% {
        transform: scale(0);
    }
    80% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

/* pointer */

div.pointer {
    position: relative;
    width: var(--nodes-size);
    height: var(--nodes-size);
    z-index: -1;
}

div.pointer img {
    width: 60px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

@keyframes slide {
    0% {
        transform: translateX(-100%);
    }
    80% {
        transform: translateX(10%);
    }
    100% {
        transform: translateX(0%);
    }
}

@keyframes highlightPointer {
    33% {
        transform: rotate(10deg);
    }
    66% {
        transform: rotate(-10deg);
    }
    100% {
        transform: rotate(0deg);
    }
}

@keyframes deletePointer {
    50% {
        transform: scale(1.3);
    }
    100% {
        transform: scale(0);
    }
}

/* user input */

section.operations {
    position: fixed;
    bottom: 5%;
    width: 100%;
}

div.wrapper {
    width: 95%;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: minmax(120px, auto);
    text-align: center;
}

div.wrapper p, div.wrapper input, div.wrapper button {
    font-family: Arial, sans-serif;
    width: 80%;
}

div.wrapper p {
    margin: 10px auto 4px auto;
    color: #fff;
}

div.wrapper input {
    padding: 5px;
    border: none;
    display: block;
    margin: 0 auto;
    box-sizing: border-box;
    margin-top: 10px;
}

div.wrapper input::placeholder {
    font-style: italic;
}

/* buttons */

button.button {
    border: none;
    background: #8900e8;
    padding: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    font-style: italic;
    color: #fff;
    display: block;
    margin: 0 auto;
    cursor: pointer;
    transition: all .2s ease-in-out;
}

button.button:hover {
    transform: scale(1.03);
}

/* errors */

section.errors {
    width: 90%;
    margin: 0 auto;
}

div.success, div.error-message {
    font-family: 'Livvic', sans-serif;
    font-size: 16px;
    font-weight: bold;
    font-style: italic;
    margin-top: 30px;
    height: 32px;
}

div.error-message {
    color: rgb(218, 23, 23);
}

div.success {
    color: green;
}

div.error-message p {
    margin: 0;
}