:root {
    --color-input: #5555BB;
    --color-input-hover: #8888EE;
    --color-input-background: #BBBBDD;
    --color-input-disabled: #999999;
    --color-struct: #5555BB;
    --color-document: #000000;
    --color-document-background: #DDDDFF;
    --color-thead-background: #BBBBDD;
    --color-table-border: #444444;
    --color-terminal: #EEEEEE;
    --color-terminal-border: #444444;
    --color-terminal-background: #222222;
    --color-group-name-background: #CCCCEE;
    --color-usr-name-background: #CCCC88;
    --color-code-mcq: #4488CC;
    --color-code-exercise: #88CC44;
    --color-code-question:  #CC8844;
    --color-exam-details-background: #CCCCEE;
    --color-warning: #CC3333;
    --color-error: #FF8888;
    --color-success: #88FF88;
    --color-help-tooltip-border: #999970;
    --color-help-tooltip-background: #FFFFDD;

    /* buttons */
    --border-width-btn: 3px;
    --margin-btn: 2px;
    --border-radius-btn: 6px;
}

/* general stuff */
body {
    font-family: verdana, helvetica, sans-serif;
    background-color: var(--color-document-background);
    color: var(--color-document);
}
em {
    font-style: italic;
    color: var(--color-struct);
}
h1 {
    font-weight: bold;
    font-size: xx-large;
    text-align: center;
    color: var(--color-struct);
}
h2 {
    font-weight: bold;
    font-size: x-large;
    text-align: center;
    color: var(--color-struct);
}
h3 {
    font-weight: bold;
    font-size: large;
    color: var(--color-struct);
}
a {
    &:visited {
	color: var(--color-input);
	text-decoration: none; 
    }
    &:link {
	color: var(--color-input);
	text-decoration: none;
    }
    &:hover {
	color: var(--color-input-hover);
    }
}
input,select {
    border-radius: 6px;
    border: solid 3px;
    background-color: var(--color-input-background);
    border-color: var(--color-input);
    &:hover:enabled {
	border-color: var(--color-input-hover);
    }
    &:disabled {
	border-color: var(--color-input-disabled);
    }
    &.error {
        background-color: var(--color-error);
    }
}
input[type=text],input[type=file],input[type=password] {
    width: 250px;
}
table {
    border-collapse: collapse;
    & > thead {
	font-size: large;
	font-weight: bold;
	text-align: center;
	background-color: var(--color-thead-background);
    }
}
span {
    &.error {
	color: var(--color-error);
    }
}
tr.spacebefore>td {
    padding-top: 30px;
}

/* box surrounding a div */
div.box {
    width: fit-content;
    position: relative;
    min-width: 800px;
    padding: 10px;
    border: 4px solid;
    border-radius: 8px;
    border-color: var(--color-struct);
    & > .submit {
	position: absolute;
	top: 5px;
	right: 5px;
    }
}

/* tag-name */
div.tag-name {
    block-size: fit-content;
    width: fit-content;
    align-content: center;
    border: 2px solid;
    border-radius: 6px;
    padding: 4px;
    vertical-align: middle;
    margin-top: 5px;
    margin-bottom: 5px;
    font-weight: bold;
    &::before {
	content: var(--url-tag-img);
	vertical-align: middle;
    }
}

/* group-name */
div.group-name {
    block-size: fit-content;
    width: fit-content;
    align-content: center;
    border: 2px solid;
    border-radius: 6px;
    padding: 4px;
    vertical-align: middle;
    margin-top: 5px;
    margin-bottom: 5px;
    font-weight: bold;
    background-color: var(--color-group-name-background);
    &::before {
	content: var(--url-grp-img);
	vertical-align: middle;
    }
}

/* usr-name */
div.usr-name {
    block-size: fit-content;
    width: fit-content;
    align-content: center;
    border: 2px solid;
    border-radius: 6px;
    padding: 4px;
    vertical-align: middle;
    margin-top: 5px;
    margin-bottom: 5px;
    font-weight: bold;
    background-color: var(--color-usr-name-background);
    &::before {
	content: var(--url-usr-img);
	vertical-align: middle;
    }
}

/* my-name */
div.my-name {
    font-size: large;
    font-weight: bold;
    color: var(--color-struct);
}

/* table for forms */
.table-form {
    margin-top: 20px;
    margin-bottom: 20px;
    margin-left: 20px;
    & tr td {
	padding: 6px;
	border-style: none;
    }
}

/* solid table with borders */
.solid-table {
    margin-top: 20px;
    margin-bottom: 20px;
    margin-left: 20px;
    border-spacing: 0px;
    & tr td {
	padding: 4px;
	border: solid 1px var(--color-table-border);
	border-style: solid solid solid solid;
    }
}

/* terminal containing verbatim outputs */
.terminal {
    color: var(--color-terminal);
    border-color: var(--color-terminal-border);
    background-color: var(--color-terminal-background);
    border-radius: 6px;
    border: 4px solid;
    height: 500px;
    padding: 10px;
    overflow-y: scroll;
}

/* buttons */
.btn {
    margin: var(--margin-btn);
    border-radius: var(--border-radius-btn);
    border-width: var(--border-width-btn);
    border-color: var(--color-input);
    border-style: solid;
    cursor: pointer;
    &:hover {
	background-color: var(--color-input-hover);
    }
}
.btn-selected {
    background-color: var(--color-input-background);
}
.warning {
    margin: 2px;
    border: 3px solid;
    border-radius: 6px;
    border-color: var(--color-warning);
}

/* <p> containing item codes in the item admin page */
p.code {
    cursor: pointer;
    width: 600px;
    border-radius: 6px;
    border: 2px solid;
    padding: 4px;
}
p.code-mcq {
    background-color: var(--color-code-mcq);
}
p.code-question {
    background-color: var(--color-code-question);
}
p.code-exercise {
    background-color: var(--color-code-exercise);
}

/* sidebar and mainpanel */
#sidebar {
    height: 100%;
    top: 5px;
    left: 5px;
    position: fixed;
    z-index: 1;
    background-color: var(--color-document-background);
}
#mainpanel {
    margin-left: calc(
	var(--icon-size)
	+ 5px
	+ 2 * (var(--margin-btn) + var(--border-width-btn))
    );
}

/* menu */
.menu {
    position: fixed;
    right: 5px;
    bottom: 5px;
    z-index: 2;
    border: solid 5px;
    border-radius: 6px;
    border-color: var(--color-input);
    padding: 6px;
    background-color: var(--color-document-background);
}
#menu-btn {
    content: var(--url-menu-img);
}
#menu-content {
    display: none;
    & * {
	display: inline-block;
	vertical-align: middle;
    }
}

/* error */
input,select {
}

/* help tooltip */
#div-tooltip-help {
    border: 4px solid;
    border-radius: 8px;
    display: none;
    padding: 20px;
    z-index: 2;
    position: fixed;
    width: 600px;
    background-color: var(--color-help-tooltip-background);
    border-color: var(--color-help-tooltip-border);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: justify;
    text-justify: inter-word;
}
#img-tooltip-help-close-button {
    top: 10px;
    right: 10px;
    position: absolute;
}
#div-tooltip-help-title {
    font-weight: bold;
    font-size: large; 
    padding-bottom: 20px;
}
#div-tooltip-help-body {
    max-height: 400px;
    overflow-y: auto;
}

.help-tooltip {
    border-bottom: 3px dotted black;
    cursor: help;
}