* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background-color: #f8f8f8;
    color: #333;
}

.m-3 {
    margin: 1rem;
}

.p-3 {
    padding: 1rem;
}

.btn {
    padding: 0.5rem 0.75rem;
    font-size: 1rem;
    border-radius: 0.25rem;
    border: 1px solid #4CAF50;
    color: #4CAF50;
    background-color: white;
    cursor: pointer;
}

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

.control {
    border: 1px solid #ccc;
    padding: 0.25rem 0.5rem;
    font-size: 1rem;
    border-radius: 0.25rem;
}

form input.control {
    width: 5rem;
}

header,
footer {
    text-align: center;
}

header {
    padding: 0.75rem; 
    background-color: #4CAF50;
    color: white;
}

footer {
    color: #aaa;
}

.card {
    border-width: 1px 0;
    border-style: solid;
    border-color: #eee;
    padding: 1rem;
    margin-top: 1rem;
    margin-bottom: 1rem;
    background-color: white;
    box-shadow: 0 0 0.5rem 0 #eee;
}

.card h3 {
    font-weight: normal;
    margin-top: 0;
    border-bottom: 1px solid #eee;
    padding-bottom: 0.5rem;
}

.card > .btn-wrap {
    margin-top: 1rem;
}

.card > .btn-wrap .btn {
    margin-right: 1rem;
}

.template-form,
#content-static {
    line-height: 2;
    white-space: pre-line;
}

.template-form > input.control {
    border-width: 0 0 1px 0;
}

.template-form .error {
    color: red;
}