.centered { text-align: center; }

body {
    font-family: arial, helvetica, sans-serif;
    line-height: 1.4em;
    margin: 0;
    font-size: 14px;
    min-width: 250px;
}
#pageWrap { margin: 0 auto; width: calc(100% - 20px); margin: 10px; }
#head { border-bottom: 1px solid #993333; }
#thorlabslogo { width: 150px; }
#subHead { text-align: center; margin-bottom: 2em; }
table { width: 96%; margin: 25px auto auto; }
table, th, td { border: 1px solid black; border-collapse: collapse; }
th, td { padding: 4px 5px; font-size: 11px; }
thead { background-color: #f0beba; }
#signedFor, #printSignature { font-size: .85em; line-height: 1.9em;}
#signedFor { margin: 4em 0 0 0; width: 200px; white-space: nowrap; }
#printSignature { clear: left; }
#signatureWrap { 
    width: 200px; 
    border-bottom: 1px solid black; 
    margin-bottom: 5px; 
    margin-top: -20px; 
    float: left;
}
#signature { width: 70%; position: relative; bottom: -12px; left: -5px; }

@media only screen and (min-width : 480px) {
    body { font-size: 16px; }
    #pageWrap { width: calc(100% - 60px); margin: 30px; }
    #subHead { margin-top: 3em; }
    #thorlabslogo { width: 175px; }
    th, td { font-size: 14px; }
    #signatureWrap { width: 280px; margin-top: -30px; }
    #signature { bottom: -16px; left: -15px; }
}

@media only screen and (min-width : 768px) {
    body,th, td {  font-size: 18px; }
    #pageWrap { width: calc(100% - 120px); margin: 30px 60px; }
    #thorlabslogo { width: 210px; }
    #signedFor, #printSignature { font-size: .95em; line-height: 1.9em;}
    #signatureWrap { width: 400px; margin-top: -36px; }
    #signature { bottom: -19px; }
}

@media only screen and (min-width : 992px) {
    body {  font-size: 20px; }
    #thorlabslogo { width: 265px; }
    #signatureWrap { margin-top: -38px; }
    #signature { bottom: -19px; left: -20px; }
}

@media only screen and (min-width : 1200px) {
    body { font-size: 20px; }
    #pageWrap { max-width: 1080px; margin: 30px auto; }
    #thorlabslogo { width: auto; height: auto; }
    #subHead { margin-bottom: 3em; }
    #signature { bottom: -19px; }
}

@media print {
    body { font-size: 14px; line-height: 1.5em; }
    #pageWrap { width: 100%; margin: 0; }
    #subHead { margin: 4em 0; }
    #thorlabslogo { width: 40%; height: 40%; }
    p { margin: 20px 0; line-height: 1.3em; }
    #signedFor { margin-top: 10em; }
    #signatureWrap { width: 400px; margin-top: -34px; }
    #signature { bottom: -19px; left: 0; }
}