styles.css

a {
    color: #11999e;
    text-decoration: none;
}

a:hover {
    color: #eaf6f6;
}

body {
    margin: 0;
    text-align: center;
    font-family: 'Merriweather', serif;
    font-weight: bolder;
    color: #40514e;
    background-color: #d9e6e6;
}

.bottom-cloud {
    position: absolute;
    left: 350px;
    bottom: 0;
    margin-bottom: 100px;
    animation-name: bottom-cloud;
    animation-iteration-count: infinite;
    animation-duration: 4s;
    animation-timing-function: ease-in-out;
}

@keyframes bottom-cloud {
    0% {
        margin-left: 0;
    }
    50% {
        margin-left: 40px;
    }
    100% {
        margin-left: 0;
    }
}

.bottom-container {
    background-color: #66bfbf;
    padding: 3rem;
}

.btn {
    background: #11cdd4;
    background-image: -webkit-linear-gradient(top, #11cdd4, #11999e);
    background-image: -moz-linear-gradient(top, #11cdd4, #11999e);
    background-image: -ms-linear-gradient(top, #11cdd4, #11999e);
    background-image: -o-linear-gradient(top, #11cdd4, #11999e);
    background-image: linear-gradient(to bottom, #11cdd4, #11999e);
    -webkit-border-radius: 19;
    -moz-border-radius: 19;
    border-radius: 19px;
    font-family: Georgia;
    color: #ffffff;
    font-size: 20px;
    padding: 10px 20px 10px 20px;
    text-decoration: none;
}

.btn:hover {
    background: #30e3cb;
    background-image: -webkit-linear-gradient(top, #30e3cb, #2bc4ad);
    background-image: -moz-linear-gradient(top, #30e3cb, #2bc4ad);
    background-image: -ms-linear-gradient(top, #30e3cb, #2bc4ad);
    background-image: -o-linear-gradient(top, #30e3cb, #2bc4ad);
    background-image: linear-gradient(to bottom, #30e3cb, #2bc4ad);
    text-decoration: none;
}

.end {
    color: #eaf6f6;
    font-size: 0.75rem;
    padding: 20px 0;
}

h1 {
    font-size: 5.625rem;
    /*100%=16px=1em*/
    margin: 50px auto 0 auto;
    font-family: 'Sacramento', cursive;
    color: #66bfbf;
}

h2 {
    font-size: 2.5rem;
    margin-top: 0;
    font-family: 'Times New Roman', Times, serif;
    color: #66bfbf;
    font-weight: normal;
}

h3 {
    font-family: 'Times New Roman', Times, serif;
    color: #11999e;
}

hr {
    margin: 4rem auto;
    border-style: dotted none none;
    width: 5%;
    border-top-width: 5px;
    border-color: #b3b3b3;
}

.intro {
    width: 50%;
    margin: auto;
    line-height: 2;
}

.last {
    word-spacing: 100px;
}

.last-text {
    margin-bottom: 50px;
}

.left-img {
    width: 25%;
    float: left;
    margin-right: 30px;
}

.middle-container {
    padding: 2.5rem;
}

.right-img {
    width: 25%;
    float: right;
    margin-left: 30px;
}

.text {
    text-align: left;
}

.top-container {
    background-color: #e4f9f5;
    position: relative;
    padding-top: 100px;
    padding-bottom: 200px;
}

.top-cloud {
    position: absolute;
    top: 50px;
    right: 400px;
    animation-name: top-cloud;
    animation-iteration-count: infinite;
    animation-duration: 4s;
    animation-timing-function: ease-in-out;
}

@keyframes top-cloud {
    0% {
        margin-right: 0;
    }
    50% {
        margin-right: 40px;
    }
    100% {
        margin-right: 0;
    }
}

.skill-row {
    width: 50%;
    margin: 100px auto;
    line-height: 2;
}