.c1 {
    color: #ececec;
}

.c2 {
    color: #9fd3c7;
}

.c3 {
    color: #385170;
}

.c4 {
    color: #142d4c;
}

p {
    color: #ececec;
}

span,
p,
li {
    max-width: 60em;

}

ul {
    padding: 18px;
}

li {
    color: #ececec;
}

a {
    color: #4CAF50;
    text-decoration: none;
    font-weight: 700;
}

body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: #142d4c;
}

header {
    background-color: #9fd3c7;
    color: #ececec;
    text-align: center;
    padding: 20px;
}

section,
.formend {
    display: flex;
    align-items: center;
    padding: 50px;
}

section.instruction {
    padding-top: 12.5px;
    padding-bottom: 12.5px;
}

section:nth-child(even) {
    background-color: #2b3f58;
}

h1 {
    color: #142d4c;
    font-weight: 800;
    font-size: 48px;
}

h2 {
    color: #9fd3c7;
}

h3 {
    color: #385170;
    font-size: 24px;
    font-weight: 400;
}

.intro {
    align-items: center;
    text-align: center;
    padding: 10px;
    background-color: #f5f5f5;
    color: #142d4c;
}

.introtext {
    padding: 30px;
}

.right {
    float: right;
    padding-right: 24px;
  }

.formend {
    flex-direction: column;
    background-color: #f5f5f5;
}

input {
    margin-bottom: 10px;
    padding: 10px;
    width: 100%;
    box-sizing: border-box;
}

button {
    padding: 10px;
    cursor: pointer;
    border: none;
    font-size: 22px;
}

.btn-ready {
    background-color: #4CAF50;
    color: white;

}

.btn-ok {
    background-color: #9fd3c7;
    color: #142d4c;

}

.btn-err {
    background-color: #ac1a0f;
    color: white;
}

.row,
.column,
img {
    box-sizing: border-box;
}

.column {
    float: left;
    width: 20%;
    padding: 0px;
}

/* Clearfix (clear floats) */
.row::after {
    content: "";
    clear: both;
    display: table;
}

.colimg {
    width: 100%;
    padding: 10px;
}