CyberChef/src/web/stylesheets/layout/_io.css

/**
 * Input/Output area styles
 *
 * @author n1474335 [n1474335@gmail.com]
 * @copyright Crown Copyright 2017
 * @license Apache-2.0
 */

#input-text,
#output-text,
#output-html {
    position: relative;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 3px;
    -moz-padding-start: 3px;
    -moz-padding-end: 3px;
    border: none;
    border-width: 0px;
    resize: none;
    background-color: transparent;
    white-space: pre-wrap;
    word-wrap: break-word;
}

#output-html {
    display: none;
    overflow-y: auto;
    -moz-padding-start: 1px; /* Fixes bug in Firefox */
}

.textarea-wrapper {
    position: absolute;
    top: 43px;
    bottom: 0;
    width: 100%;
    overflow: hidden;
}

.textarea-wrapper textarea,
.textarea-wrapper div {
    font-family: var(--fixed-width-font-family);
    font-size: var(--fixed-width-font-size);
    color: var(--fixed-width-font-colour);
}

#input-highlighter,
#output-highlighter {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    padding: 3px;
    margin: 0;
    overflow: hidden;
    letter-spacing: normal;
    white-space: pre-wrap;
    word-wrap: break-word;
    color: #fff;
    background-color: transparent;
    border: none;
}

#output-loader {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    background-color: var(--primary-background-colour);
    visibility: hidden;
    opacity: 0; 

    transition: all 0.5s ease;
}

.io-btn-group {
    float: right;
    margin-top: -4px;
}

.io-info {
    margin-right: 20px;
    margin-top: -4px;
    float: right;
    height: 30px;
    text-align: right;
    line-height: 10px;
    font-family: var(--fixed-width-font-family);
    font-weight: normal;
    font-size: 8pt;
}

#input-info {
    line-height: 15px;
}

.dropping-file {
    border: 5px dashed var(--drop-file-border-colour) !important;
}

#stale-indicator {
    visibility: hidden;
    transition: all 0.3s;
    margin-left: 5px;
    font-size: larger;
    font-weight: normal;
    cursor: help;
}