main.css

body {
    margin: 0;
    padding-top: 50px;
    -webkit-tap-highlight-color: rgba(0,0,0,0);
    -moz-tap-highlight-color: rgba(0,0,0,0);
    -ms-tap-highlight-color: rgba(0,0,0,0);
    -o-tap-highlight-color: rgba(0,0,0,0);
    tap-highlight-color: rgba(0,0,0,0);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-smoothing: antialiased;
    -webkit-osx-font-smoothing: grayscale;
    -moz-osx-font-smoothing: grayscale;
    osx-font-smoothing: grayscale;
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
    -webkit-text-shadow: 1px 1px 1px rgba(0,0,0,0.004);
    -ms-text-shadow: 1px 1px 1px rgba(0,0,0,0.004);
    text-shadow: 1px 1px 1px rgba(0,0,0,0.004);
    text-rendering: optimizeSpeed!important;
    font-smooth: always;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    text-size-adjust: 100%;
    font-family: Monserrat, sans-serif;
}

nav input, nav button  {
    font-size: 16px;
    height: 28px;
    box-sizing: border-box;
    vertical-align: middle;
    line-height: 1;
    outline: none;
}
nav header {
    font-family: Monserrat, sans-serif;
    float: left;
    margin-left: 20px;
    font-size: 25px;
    color: #00329F;
    font-weight: bold;
}

nav input {
    width: 50%;
    box-sizing: border-box;
    max-width: 500px;
    padding: 0 10px;

    color: #555;
    background-color: #fff;
    border: 1px solid #ccc;
    -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.075);
    box-shadow: inset 0 1px 1px rgba(0,0,0,.075);
    -webkit-transition: border-color ease-in-out .15s,-webkit-box-shadow ease-in-out .15s;
    -o-transition: border-color ease-in-out .15s,box-shadow ease-in-out .15s;
    transition: border-color ease-in-out .15s,box-shadow ease-in-out .15s;
}

nav input:focus {
    border-color: #66afe9;
    outline: 0;
    -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.075),0 0 8px rgba(102,175,233,.6);
    box-shadow: inset 0 1px 1px rgba(0,0,0,.075),0 0 8px rgba(102,175,233,.6);
}

nav button {
    background-color: #fff;
    color: #333;
    padding: 2px 10px;

    touch-action: manipulation;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    border: 1px solid #ccc;
}

nav button:hover {
    background-color: #e6e6e6;
    border-color: #adadad;
}
nav button:active {
    background-color: #d4d4d4;
    border-color: #8c8c8c;
}

nav {
    width: 100%;
    height: 50px;
    line-height: 50px;
    text-align: center;
    background-color: white;
    border-bottom: 1px solid #ccc;
    position: fixed;
    top: 0;
    z-index: 1;
    box-sizing: border-box;
}

nav iframe {
  margin: 10px 0;
  position: absolute;
  right: 0;
  top: 0;
}

header a {
  color: inherit;
  text-decoration: none;
}
@media (min-width: 1000px) {
    nav header {
        position: absolute;
    }
}

@media (max-width: 500px) {
    nav input {
        width: 70%;
    }
    nav header {
        display: none;
    }

    nav iframe {
      display: none;
    }
}