main.css

:root {
  --text-bg: #fafaed;
  --text-typo: #2f4f4f;
  --sidebar-bg: #c1a68f;
  --thumb-bg: #fdfdf9;
  --thumb-typo: #1c2f2f;
  --thumb-close-bg: #cfdbeb;
  --button-bg: #b0c4de;
  --active-typo: #9eb0c7;
  --selection-bg: #e6dbd0;

  --dark-text-bg: #2B2B2B;
  --dark-text-typo: #fdfdf9;
  --dark-sidebar-bg: #423F3E;
  --dark-thumb-bg: #262626;
  --dark-thumb-typo: #fdfdf9;
  --dark-thumb-close-bg: #7d4f4f;
  --dark-button-bg: #694242;
  --dark-active-typo: #bd9696;
  --dark-selection-bg: #72573c;
}

@font-face {
    font-family: 'crimson_text';
    src: url('fonts/crimsontext-roman.woff2') format('woff2'),
         url('fonts/crimsontext-roman.woff') format('woff'),
         url('fonts/crimsontext-roman.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

html, body {
  padding: 0;
  margin: 0;
}

::selection {
  background: var(--selection-bg);
}

.dark-mode ::selection {
  background: var(--dark-selection-bg);
}

#wrapper {
  display: flex;
  height: 100vh;
  font-family: crimson_text;
  color: var(--text-typo);
}

.dark-mode #wrapper {
  color: var(--dark-text-typo);
}

#text-container {
  width: 80%;
  padding: 75px 100px;
  background-color: var(--text-bg);
  overflow-y: auto;
  overflow-wrap: break-word;
  box-sizing: initial;
}

.dark-mode #text-container {
  background-color: var(--dark-text-bg);
}

#text {
  height: 100%;
  font-size: 1.7em;
  max-width: 900px;
  margin: auto;
}

#text:focus {
  outline: 0px solid transparent;
}

#sidebar {
  width: 20%;
  background-color: var(--sidebar-bg);
  overflow-y: auto;

  justify-content: space-between;
  display: flex;
  flex-direction: column;
}

.dark-mode #sidebar {
  background-color: var(--dark-sidebar-bg);
}

.controls-container {
  position: fixed;
  bottom: 25px;
  right: calc(20% - 20px);
}

.control-button {
  padding: 7px;
  border-radius: 10px;
  background-color: var(--button-bg);
  color: var(--text-typo);
  text-transform: uppercase;
  cursor: pointer;
  font-weight: bold;
  font-family: arial;
  margin-left: 10px;
  user-select: none;
}

.dark-mode .control-button {
  background-color: var(--dark-button-bg);
  color: var(--dark-text-typo);
}

.control-button:hover {
  filter: brightness(90%);
}

#active-draft {
  font-size: 1.5em;
  font-family: arial;
  font-weight: bold;
  color: var(--active-typo);
  text-align: right;
  margin-bottom: 15px;
}

.dark-mode #active-draft {
  color: var(--dark-active-typo);
}

.thumbnails-container {
  height: calc(100% - 64px);
  position: fixed;
  overflow: scroll;
}

.thumbnail {
  background-color: var(--thumb-bg);
  color: var(--thumb-typo);
  margin: 15px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  user-select: none;
}

.dark-mode .thumbnail {
  background-color: var(--dark-thumb-bg);
  color: var(--dark-thumb-typo);
}

.thumbnail-content {
  display: flex;
  align-items: center;
  padding: 5px;
  width: 100%;
  max-width: calc(100% - 55px);
  overflow-wrap: anywhere;
}

.delete-container {
  min-width: 30px;
  background-color: var(--thumb-close-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
}

.dark-mode .delete-container {
  background-color: var(--dark-thumb-close-bg);
}

.delete-container:hover {
  filter: brightness(90%);
}

.delete-icon {
  width: 16px;
  opacity: 0.3;
}

.position-container {
  font-size: 1.7em;
  font-family: arial;
  font-weight: bold;
  width: 35px;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--active-typo);
  padding: 5px;
}

.dark-mode .position-container {
  color: var(--dark-active-typo);
}

.empty-sidebar-container {
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.empty-sidebar {
  font-family: arial;
  text-transform: uppercase;
  color: var(--text-typo);
  font-weight: bold;
  opacity: 0.4;
  font-size: 1.4em;
}

.dark-mode .empty-sidebar {
  color: var(--dark-text-typo)
}

 /* checkbox, inspiration: https://blog.logrocket.com/how-to-style-forms-with-css-a-beginners-guide/ */


.sidebar-controls-container {
  position: fixed;
  bottom: 0;
  width: 100%;
  padding-top: 12px;
}

.sidebar-controls {
  display: flex;
  margin-bottom: 19px;
  padding-left: 20px;
}

.checkbox-container {
  display: flex;
  width: fit-content;
  margin: auto;
  padding: 7px;
  border-radius: 10px;

  background-color: var(--thumb-bg);
  color: var(--text-typo);

  cursor: pointer;
  font-weight: bold;
  font-family: arial;
  user-select: none;
}

.dark-mode .checkbox-container {
  background-color: var(--dark-thumb-bg);
  color: var(--dark-text-typo);
}

.checkbox-label {
  position: relative;
  padding-left:30px;
  cursor: pointer;
}

/* hide default checkbox  */
.checkbox-label input[type=checkbox] {
  position: absolute;
  border: none;
  appearance: none;
  width: 0;
  height: 0;
  margin: 0;
}

/* custom checkbox */
.checkbox-label span {
  position: absolute;
  top:0;
  left:0;
  width:20px;
  height:20px;
  background-color: #ddd;
  transition: .3s background-color;
}

.checkbox-label span:after {
  content: "";
  position: absolute;
  display: none;

  /* check icon */
  left: 7px;
  top: 4px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 3px 3px 0;
  transform: rotate(45deg);
}

.checkbox-label:hover span {
  background-color: #ccc;
}

.checkbox-label input:checked ~ span {
  background-color: var(--dark-active-typo);;
}

.checkbox-label input:checked ~ span:after {
  display:block;
}