body {
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
    font-family: 'Ubuntu', sans-serif;
    color: #333;
}

h1 {
    margin: 28px 0 28px 40px;
    font-size: 30px;
    font-weight: 700;
    color: #333;
}

main {
    width: 820px;
    margin-left: 40px;
    overflow: hidden;
    padding-bottom: 40px;
}

.button_container {
    width: 372px;
    height: 372px;
    border: 2px solid #dddddd;
    box-sizing: border-box;
    background-color: #f0f0f0;
    position: relative;
    float: left;
    margin: 0 14px 14px 0;
}

a.button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-decoration: none;
    transition: all .3s ease;
}

/* SPOTIFY */
#btn_spotify {
    font-size: 25px;
    font-weight: 400;
    color: #fff;
    background-color: #2ebd59;
    border: 3px solid #2ebd59;
    border-radius: 40px;
    padding: 14px 46px;
    line-height: 1;
}

#btn_spotify:hover {
    color: #000;
    background-color: #fff;
    border-color: #000;
}

/* AMAZON */
#btn_amazon {
    width: 110px;
    height: 110px;
    border-radius: 55px;
    background-color: #232f3e;
    color: #fff;
    font-family: Georgia, serif;
    font-size: 86px;
    font-weight: 700;
    line-height: 96px;
    text-align: center;
}

#btn_amazon:hover {
    background-color: #eda63a;
}

/* TWITTER */
#btn_twitter {
    font-family: Arial, sans-serif;
    font-size: 21px;
    font-weight: 700;
    color: #fff;
    background-color: #55c0e8;
    padding: 17px 44px;
    border-radius: 6px;
    line-height: 1;
}

#btn_twitter:hover {
    background-color: #2ea2cb;
    box-shadow: 0 6px 14px rgba(58, 167, 208, 0.28);
}

/* INDIEGOGO */
#btn_indiegogo {
    font-family: Arial, sans-serif;
    font-size: 33px;
    font-weight: 700;
    color: #eb1478;
    text-transform: uppercase;
    line-height: 1;
    padding: 12px 18px;
}

#btn_indiegogo:hover {
    color: #fff;
    background-color: #eb1478;
}

/* APPLE */
#btn_amazon {
    width: 120px;
    height: 120px;
    background-color: #232f3e;
    border-radius: 60px;
    color: white;
    font-family: Georgia, serif;
    font-size: 80px;
    font-weight: bold;
    line-height: 110px;
    text-align: center;
}

#btn_apple:hover {
    background-color: #111;
    color: #fff;
    box-shadow: 0 0 16px rgba(0,0,0,.12);
}

/* NIKE */
#btn_nike {
    font-family: 'Archivo', sans-serif;
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 2px;
    color: #111;
    border: 3px solid #111;
    background-color: transparent;
    padding: 14px 42px;
    line-height: 1;
    transform: translate(-50%, -50%) skewX(-12deg);
}

#btn_nike:hover {
    background-color: #111;
    color: #fff;
    box-shadow: 7px 7px 0 #cfcfcf;
}

/* LYFT */
#btn_lyft {
    font-family: 'Montserrat', sans-serif;
    font-size: 23px;
    font-weight: 700;
    color: #fff;
    background-color: #ff00bf;
    border-radius: 36px;
    padding: 15px 32px;
    line-height: 1;
    white-space: nowrap;
}

#btn_lyft .car {
    display: inline-block;
    margin-right: 10px;
    transition: transform .3s ease;
}

#btn_lyft:hover {
    background-color: #d800a2;
    box-shadow: 0 6px 14px rgba(255, 0, 191, .24);
}

#btn_lyft:hover .car {
    transform: translateX(8px);
}

/* OLD NAVY */
#btn_oldnavy {
    width: 176px;
    height: 96px;
    border-radius: 50%;
    background-color: #fff;
    border: 3px solid #0d2f81;
    color: #0d2f81;
    font-family: 'Montserrat', sans-serif;
    font-size: 21px;
    font-weight: 700;
    line-height: 90px;
    text-align: center;
    letter-spacing: 1px;
}

#btn_oldnavy:hover {
    background-color: #0d2f81;
    color: #fff;
    transform: translate(-50%, -50%) rotate(-6deg) scale(1.03);
}

/* NPR */
#btn_npr {
    font-size: 0;
    line-height: 1;
}

#btn_npr .npr-box {
    display: inline-block;
    width: 56px;
    height: 56px;
    font-family: Arial, sans-serif;
    font-size: 39px;
    font-weight: 700;
    color: #fff;
    text-align: center;
    line-height: 56px;
    text-transform: lowercase;
    transition: transform .25s ease;
}

#btn_npr .npr-n {
    background-color: #000;
}

#btn_npr .npr-p {
    background-color: #d62027;
}

#btn_npr .npr-r {
    background-color: #2376bc;
}

#btn_npr:hover .npr-n {
    transform: translateY(-6px);
}

#btn_npr:hover .npr-p {
    transform: translateY(6px);
}

#btn_npr:hover .npr-r {
    transform: translateY(-6px);
}