.loader {
    --color: white;
    --size-mid: 6vmin;
    --size-dot: 1.5vmin;
    --size-bar: 0.4vmin;
    --size-square: 3vmin;

    display: block;
    position: relative;
    width: 50%;
    display: grid;
    place-items: center;
}

.loader::before,
.loader::after {
    content: "";
    box-sizing: border-box;
    position: absolute;
}

/**
loader --1
**/
.loader.--1::before {
    width: var(--size-mid);
    height: var(--size-mid);
    border: 4px solid var(--color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: loader-1 1s linear infinite;
}

.loader.--1::after {
    width: calc(var(--size-mid) - 2px);
    height: calc(var(--size-mid) - 2px);
    border: 2px solid transparent;
    border-top-color: var(--color);
    border-radius: 50%;
    animation: loader-1 0.6s linear reverse infinite;
}

@keyframes loader-1 {
    100% {
        transform: rotate(1turn);
    }
}

/**
loader --2
**/
.loader.--2::before,
.loader.--2::after {
    width: var(--size-dot);
    height: var(--size-dot);
    background-color: var(--color);
    border-radius: 50%;
    opacity: 0;
    animation: loader-2 0.8s cubic-bezier(0.2, 0.32, 0, 0.87) infinite;
}

.loader.--2::after {
    animation-delay: 0.3s;
}

@keyframes loader-2 {

    0%,
    80%,
    100% {
        opacity: 0;
    }

    33% {
        opacity: 1;
    }

    0%,
    100% {
        transform: translateX(-4vmin);
    }

    90% {
        transform: translateX(4vmin);
    }
}

/**
loader --3
**/
.loader.--3::before,
.loader.--3::after {
    width: var(--size-dot);
    height: var(--size-dot);
    background-color: var(--color);
    border-radius: 50%;
    animation: loader-3 1.2s ease-in-out infinite;
}

.loader.--3::before {
    left: calc(50% - 1.6vmin - var(--size-dot));
}

.loader.--3::after {
    left: calc(50% + 1.6vmin);
    animation-delay: -0.4s;
}

@keyframes loader-3 {

    0%,
    100% {
        transform: translateY(-2.6vmin);
    }

    44% {
        transform: translateY(2.6vmin);
    }
}

/**
loader --4
**/
.loader.--4::before {
    height: var(--size-bar);
    width: 6vmin;
    background-color: var(--color);
    animation: loader-4 0.8s cubic-bezier(0, 0, 0.03, 0.9) infinite;
}

@keyframes loader-4 {

    0%,
    44%,
    88.1%,
    100% {
        transform-origin: left;
    }

    0%,
    100%,
    88% {
        transform: scaleX(0);
    }

    44.1%,
    88% {
        transform-origin: right;
    }

    33%,
    44% {
        transform: scaleX(1);
    }
}

/**
loader --5
**/
.loader.--5::before,
.loader.--5::after {
    height: 3vmin;
    width: var(--size-bar);
    background-color: var(--color);
    animation: loader-5 0.6s cubic-bezier(0, 0, 0.03, 0.9) infinite;
}

.loader.--5::before {
    left: calc(50% - 1vmin);
    top: calc(50% - 3vmin);
}

.loader.--5::after {
    left: calc(50% + 1vmin);
    top: calc(50% - 1vmin);
    animation-delay: 0.2s;
}

@keyframes loader-5 {

    0%,
    88%,
    100% {
        opacity: 0;
    }

    0% {
        transform: translateY(-6vmin);
    }

    33% {
        opacity: 1;
    }

    33%,
    88% {
        transform: translateY(3vmin);
    }
}

/**
loader --6
**/
.loader.--6::before {
    width: var(--size-square);
    height: var(--size-square);
    background-color: var(--color);
    top: calc(50% - var(--size-square));
    left: calc(50% - var(--size-square));
    animation: loader-6 2.4s cubic-bezier(0, 0, 0.24, 1.21) infinite;
}

@keyframes loader-6 {

    0%,
    100% {
        transform: none;
    }

    25% {
        transform: translateX(100%);
    }

    50% {
        transform: translateX(100%) translateY(100%);
    }

    75% {
        transform: translateY(100%);
    }
}

/**
loader --7
**/
.loader.--7::before,
.loader.--7::after {
    width: var(--size-square);
    height: var(--size-square);
    background-color: var(--color);
}

.loader.--7::before {
    top: calc(50% - var(--size-square));
    left: calc(50% - var(--size-square));
    animation: loader-6 2.4s cubic-bezier(0, 0, 0.24, 1.21) infinite;
}

.loader.--7::after {
    top: 50%;
    left: 50%;
    animation: loader-7 2.4s cubic-bezier(0, 0, 0.24, 1.21) infinite;
}

@keyframes loader-7 {

    0%,
    100% {
        transform: none;
    }

    25% {
        transform: translateX(-100%);
    }

    50% {
        transform: translateX(-100%) translateY(-100%);
    }

    75% {
        transform: translateY(-100%);
    }
}

/**
loader --8
**/
.loader.--8::before,
.loader.--8::after {
    width: var(--size-dot);
    height: var(--size-dot);
    border-radius: 50%;
    background-color: var(--color);
}

.loader.--8::before {
    top: calc(50% + 4vmin);
    animation: loader-8-1 0.8s cubic-bezier(0.06, 0.01, 0.49, 1.18) infinite;
}

.loader.--8::after {
    opacity: 0;
    top: calc(50% - 2vmin);
    animation: loader-8-2 0.8s cubic-bezier(0.46, -0.1, 0.27, 1.07) 0.2s infinite;
}

@keyframes loader-8-1 {

    0%,
    55%,
    100% {
        opacity: 0;
    }

    0% {
        transform: scale(0.2);
    }

    22% {
        opacity: 1;
    }

    33%,
    55% {
        transform: scale(1) translateY(-6vmin);
    }
}

@keyframes loader-8-2 {

    0%,
    100% {
        opacity: 0;
    }

    33% {
        opacity: 0.3;
    }

    0% {
        transform: scale(0);
    }

    100% {
        transform: scale(4);
    }
}

/**
loader --9
**/
.loader.--9::before,
.loader.--9::after {
    width: var(--size-dot);
    height: var(--size-dot);
    border-radius: 50%;
    background-color: var(--color);
    animation: loader-9 0.42s cubic-bezier(0.39, 0.31, 0, 1.11) infinite;
}

.loader.--9::before {
    left: calc(50% - var(--size-dot) - 1.6vmin);
}

.loader.--9::after {
    left: calc(50% + 1.6vmin);
    animation-delay: 0.12s;
}

@keyframes loader-9 {

    0%,
    100% {
        opacity: 0;
    }

    0% {
        transform: translate(-4vmin, -4vmin);
    }

    66% {
        opacity: 1;
    }

    66%,
    100% {
        transform: none;
    }
}

/**
miscs
**/

.container {
    display: grid;
    grid-template-columns: repeat(3, 18vmin);
    grid-template-rows: repeat(3, 18vmin);
    grid-gap: 1vmin;
}

.item {
    background: rgba(255, 255, 255, 0.1);
    display: grid;
    place-items: center;
    border-radius: 4px;
    transition: opacity 0.4s ease;
}

.container:hover .item {
    opacity: 0.3;
}

.container:hover .item:hover {
    opacity: 1;
}

.page {
    margin: auto;
}

.header {
    margin-bottom: 4vmin;
}

.header-title {
    font-size: 3.75vmin;
}

.header-subtitle {
    font-size: 2vmin;
    text-transform: uppercase;
    opacity: 0.6;
}

html,
body {
    display: flex;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(to right top,
            #051937,
            #004d7a,
            #008793,
            #00bf72,
            #a8eb12);
    font-family: "Noto Sans", sans-serif;
    color: white;
    text-align: center;
    letter-spacing: 0.3px;
}