style.css

article, aside, dialog, figure, footer, header, hgroup, nav, section {
    display: block;
    zoom: 1;
}

html {
    box-sizing: border-box;
}

*, *:before, *:after {
    box-sizing: inherit;
}

html, body {
    width: 100%;
    height: 100%;

    margin: 0;
    padding: 0;
}

body {
    background: #2c3e50;
    font-family: 'Roboto', sans-serif;
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    margin: 0;
    padding: 0;
    height: 100vh;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -webkit-flex-direction: column;
    -ms-flex-direction: column;
    flex-direction: column;

    -webkit-box-pack: start;

    -webkit-justify-content: flex-start;

    -ms-flex-pack: start;

    justify-content: flex-start; /* align items in Main Axis */
    -webkit-box-align: stretch;
    -webkit-align-items: stretch;
    -ms-flex-align: stretch;
    align-items: stretch; /* align items in Cross Axis */
    -webkit-align-content: stretch;
    -ms-flex-line-pack: stretch;
    align-content: stretch; /* Extra space in Cross Axis */
}

header, footer {
    background: white;
    margin: 0;
    padding: 20px;
    text-align: center;
    box-shadow: 0 0 30px rgba(0, 0, 0, .3);
    max-height: 60px;
}

header {
    max-height: 180px;
}

h1, footer, section {
    -webkit-box-flex: 1;
    -webkit-flex: 1;
    -ms-flex: 1;
    flex: 1;
}

h1, h2 {
    font-weight: 300;
}

h1 {
    margin-bottom: 8px;
}

h2 {
    color: white;
}

p a {
    color: white;
}

i {
    color: #ccc;
}

footer a {
    color: black;
}

article {
    -webkit-box-flex: 1;
    -webkit-flex: 1 auto;
    -ms-flex: 1 auto;
    flex: 1 auto;
    padding: 30px;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -webkit-flex-direction: column;
    -ms-flex-direction: column;
    flex-direction: column;
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;

    -webkit-box-pack: start;

    -webkit-justify-content: flex-start;

    -ms-flex-pack: start;

    justify-content: flex-start; /* align items in Main Axis */
    -webkit-box-align: stretch;
    -webkit-align-items: stretch;
    -ms-flex-align: stretch;
    align-items: stretch; /* align items in Cross Axis */
    -webkit-align-content: stretch;
    -ms-flex-line-pack: stretch;
    align-content: stretch; /* Extra space in Cross Axis */
}

section {
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: horizontal;
    -webkit-box-direction: normal;
    -webkit-flex-direction: row;
    -ms-flex-direction: row;
    flex-direction: row;
    position: relative;
}

textarea, h2 {
    -webkit-box-flex: 1;
    -webkit-flex: 1 auto;
    -ms-flex: 1 auto;
    flex: 1 auto;
}

h2 {
    max-height: 50px;
}

textarea {
    width: 100%;
    display: block;
    padding: 20px;
    color: white;

    background: none;
    border: 1px solid #ccc;
}

section:first-of-type {
    border-right: 1px solid white;
}

aside {
    padding: 40px;
    background: rgba(0, 0, 0, .3);
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
}

aside p {
    -webkit-box-flex: 1;
    -webkit-flex-grow: 1;
    -ms-flex-positive: 1;
    flex-grow: 1;
    color: #ccc;
    padding: 0 20px;
    line-height: 1.6;
}

aside p:last-child {
    -webkit-box-flex: 2;
    -webkit-flex-grow: 2;
    -ms-flex-positive: 2;
    flex-grow: 2;
}

aside p strong {
    text-transform: uppercase;
    display: block;
    margin-bottom: 20px;
}

@-webkit-keyframes rotate_pacman_half_up {
    0% {
        -webkit-transform: rotate(270deg);
        transform: rotate(270deg);
    }
    50% {
        -webkit-transform: rotate(360deg);
        transform: rotate(360deg);
    }
    100% {
        -webkit-transform: rotate(270deg);
        transform: rotate(270deg);
    }
}

@keyframes rotate_pacman_half_up {
    0% {
        -webkit-transform: rotate(270deg);
        transform: rotate(270deg);
    }
    50% {
        -webkit-transform: rotate(360deg);
        transform: rotate(360deg);
    }
    100% {
        -webkit-transform: rotate(270deg);
        transform: rotate(270deg);
    }
}

@-webkit-keyframes rotate_pacman_half_down {
    0% {
        -webkit-transform: rotate(90deg);
        transform: rotate(90deg);
    }
    50% {
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100% {
        -webkit-transform: rotate(90deg);
        transform: rotate(90deg);
    }
}

@keyframes rotate_pacman_half_down {
    0% {
        -webkit-transform: rotate(90deg);
        transform: rotate(90deg);
    }
    50% {
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100% {
        -webkit-transform: rotate(90deg);
        transform: rotate(90deg);
    }
}

@-webkit-keyframes pacman-balls {
    75% {
        opacity: 0.7;
    }
    100% {
        -webkit-transform: translate(-100px, -6.25px);
        transform: translate(-100px, -6.25px);
    }
}

@keyframes pacman-balls {
    75% {
        opacity: 0.7;
    }
    100% {
        -webkit-transform: translate(-100px, -6.25px);
        transform: translate(-100px, -6.25px);
    }
}

#loader {
    position: absolute;
    top: 50%;
    left: 50%;
    background: white;
    height: 160px;
    width: 160px;
    margin-left: -80px;
    margin-top: -80px;
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-align-content: center;
    -ms-flex-line-pack: center;
    align-content: center;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
    border-radius: 100%;
    opacity: 0;
    pointer-events: none;
    -webkit-transition: .3s;
    transition: .3s;
}

#loader.visible {
    opacity: 1;
}

.pacman {
    position: relative;
    -webkit-transform: scale(-1, 1);
    transform: scale(-1, 1);
}

.pacman > div:nth-child(2) {
    -webkit-animation: pacman-balls 1s -0.99s infinite linear;
    animation: pacman-balls 1s -0.99s infinite linear;
}

.pacman > div:nth-child(3) {
    -webkit-animation: pacman-balls 1s -0.66s infinite linear;
    animation: pacman-balls 1s -0.66s infinite linear;
}

.pacman > div:nth-child(4) {
    -webkit-animation: pacman-balls 1s -0.33s infinite linear;
    animation: pacman-balls 1s -0.33s infinite linear;
}

.pacman > div:nth-child(5) {
    -webkit-animation: pacman-balls 1s 0s infinite linear;
    animation: pacman-balls 1s 0s infinite linear;
}

.pacman > div:first-of-type {
    width: 0px;
    height: 0px;
    border-right: 25px solid transparent;
    border-top: 25px solid #2c3e50;
    border-left: 25px solid #2c3e50;
    border-bottom: 25px solid #2c3e50;
    border-radius: 25px;
    -webkit-animation: rotate_pacman_half_up 0.5s 0s infinite;
    animation: rotate_pacman_half_up 0.5s 0s infinite;
    position: relative;
    left: -30px;
}

.pacman > div:nth-child(2) {
    width: 0px;
    height: 0px;
    border-right: 25px solid transparent;
    border-top: 25px solid #2c3e50;
    border-left: 25px solid #2c3e50;
    border-bottom: 25px solid #2c3e50;
    border-radius: 25px;
    -webkit-animation: rotate_pacman_half_down 0.5s 0s infinite;
    animation: rotate_pacman_half_down 0.5s 0s infinite;
    margin-top: -50px;
    position: relative;
    left: -30px;
}

.pacman > div:nth-child(3),
.pacman > div:nth-child(4),
.pacman > div:nth-child(5),
.pacman > div:nth-child(6) {
    background-color: #2c3e50;
    width: 15px;
    height: 15px;
    border-radius: 100%;
    margin: 2px;
    width: 10px;
    height: 10px;
    position: absolute;
    -webkit-transform: translate(0, -6.25px);
    transform: translate(0, -6.25px);
    top: 25px;
    left: 70px;
}