/* =========================
 * Responsive width
 * =========================*/
@media screen {
    body {
	width:600px;
	margin: auto;
	background-color: #def;
    }
}
@media screen and (max-width: 600px){
    body {
	width:100%;
	margin: 0;
    }
}

/* =========================
 * Table style
 * =========================*/
td { 
    border: solid black 1px;
}
td,th {
    padding: 1pt, 3pt;
    width:84px;
    height:20px;
}
/* =========================
 * Answer style ...
 * =========================*/
.good {
    background-color: #cfc;
}
.good::after {
    content: "Well done!";
    font-size:70%;
    color:#6a6;
    padding-left: 1em;
}
.bad {
    background-color: #fcc;
}
.bad::after {
    content: "incorrect: please try again";
    font-size:70%;
    color:#a66;
    padding-left: 3em;
}
.parseError, .needEquation, .tooManyEquals {
    background-color: #ccc;
}
.parseError::after {
    content: "meaningless input: please correct it";
    font-size:70%;
    color:#666;
    padding-left: 3em;
}
.needEquation::after {
    content: "enter an equation";
    font-size:70%;
    color:#666;
    padding-left: 3em;
}
.tooManyEquals::after {
    content: "too many '=' signs";
    font-size:70%;
    color:#666;
    padding-left: 3em;
}
.unsimple {
    background-color: #ff6;
}
.unsimple::after {
    content: "correct but needs to be simplified";
    font-size:70%;
    color:#aa8;
    padding-left: 3em;
}

/* =========================
 * Modal dialog styles
 * =========================*/
/* The Modal (background) */
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1; /* Sit on top */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgb(0,0,0); /* Fallback color */
    background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}

/* Modal Content/Box */
.modal-content {
    background-color: #fefefe;
    margin: 15% auto; /* 15% from the top and centered */
    padding: 20px;
    border: 1px solid #888;
    width: 80%; /* Could be more or less, depending on screen size */
}

/* The Close Button */
.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}

/* =========================
 * Problem styles
 * =========================*/
.problems-container {
    background-color: #eee;
    width: auto;
}
.answer {
    font-size: 18px;
    display:block;
    padding: 0;
    border: 2px solid #ccc;
    border-left: 0;
    border-top: 0;
    margin: 0 29px;
    margin-top:0;
    padding: 0 6px;
    color: #333;
    border-radius: 0 0 7px 0;
    font-family: 'PT Sans', sans-serif;
    width:auto;
    right: 100%;
}
.problem {
    font-size: 18px;
    margin: 9px;
    padding: 6px;
    color: #333;
    font-family: 'PT Sans', sans-serif;
}