options.css

/* Copyright 2018 The Chromium Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file. */

/** Body modifier class, indicates when options should be visible. */
.show-options {
  grid-template-columns: auto 256px;
}

.show-options .options {
  display: block;
}

/** Black overlay shown on smaller screens when options is visible. */
.scrim {
  z-index: 5; /* Side panel layer */
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 256px;
  background: #00000050;
}

/** Options side panel */
.options {
  z-index: 5; /* Side panel layer */
  display: none;
  grid-area: options;
  padding: 0 16px;
  overflow-y: auto;
  position: fixed;
  right: 0;
  top: 0;
  height: 100vh;
  width: 224px;
  background: #fffffff5;
  box-shadow: 0 1px 2px #3c40434d, 0 2px 6px 2px #3c404326;
}

fieldset {
  border: 0;
  padding: 0;
  margin: 2em 0 1em;
}
.options fieldset:first-of-type {
  margin-top: 1em;
}
legend {
  margin: 1em 0;
  padding: 0;
}

/** Toolbar */
.form-bar {
  display: flex;
  justify-content: flex-end;
  height: 64px;
  align-items: center;
}

/** Buttons */
.icon-button {
  height: 40px;
  width: 40px;
  cursor: pointer;
  background: transparent;
  border: 0;
  border-radius: 50%;
}
.icon-button:hover {
  background: #0000001f;
}

/** <input type='text'> or <select> elements */
.input-wrapper,
.select-wrapper {
  position: relative;
  border-top-left-radius: 4px;
  border-top-right-radius: 4px;
  background: rgba(0, 0, 0, 0.04);
  margin-bottom: 1em;
}
input[type='text'],
input[type='number'],
select {
  box-sizing: border-box;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  font: inherit;
  background: transparent;
  border: 0;
  padding: 20px 12px 13px;
  width: 100%;
  caret-color: #1a73e8;
}
.input-label,
.select-label {
  position: absolute;
  z-index: -1;
  top: 0;
  bottom: -1px;
  left: 0;
  right: 0;
  font-size: 12px;
  line-height: 20px;
  padding: 0 12px;
  color: #5f6368;
  border-bottom: 1px solid currentColor;
}
.select-label::after {
  content: '';
  position: absolute;
  top: calc(50% - 5px);
  right: 4px;
  margin: 5px 7px 5px 8px;
  border-style: solid;
  border-width: 5px 5px 0 5px;
  border-color: currentColor transparent transparent transparent;
  transition: transform 0.2s ease-out;
}
input[type='text']:focus + .input-label,
input[type='number']:focus + .input-label,
select:focus + .select-label {
  color: #1a73e8;
  bottom: -2px;
  border-width: 2px;
}
select:focus + .select-label::after {
  transform: rotate(180deg);
}

/** <input type='checkbox' or 'radio'> elements */
input[type='checkbox'],
input[type='radio'] {
  position: absolute;
  margin: 0;
  height: 18px;
  width: 18px;
  opacity: 0;
}
.checkbox-wrapper,
.radio-wrapper {
  position: relative;
}
.checkbox-label,
.radio-label {
  display: block;
  position: relative;
  padding-left: 34px;
  margin: 4px 0;
  cursor: pointer;
  font-size: 14px;
}
.checkbox-label::before,
.checkbox-label::after,
.radio-label::before,
.radio-label::after {
  position: absolute;
  content: '';
  border: 2px solid currentColor;
}
.checkbox-label::before,
.radio-label::before {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  left: 0;
}
.checkbox-label::after {
  opacity: 0;
  width: 4px;
  height: 9px;
  left: 6px;
  top: 2px;
  border-top-width: 0;
  border-left-width: 0;
  transform: rotate(45deg);
  opacity: 0;
}
.radio-label::before {
  border-radius: 50%;
}
.radio-label::after {
  opacity: 0;
  width: 4px;
  height: 4px;
  left: 5px;
  top: 5px;
  background: currentColor;
  border-radius: 50%;
}
input[type='checkbox']:checked + .checkbox-label,
input[type='radio']:checked + .radio-label {
  color: #1a73e8;
}
input[type='checkbox']:checked + .checkbox-label::after,
input[type='radio']:checked + .radio-label::after {
  opacity: 1;
}
input[type='checkbox']:disabled + .checkbox-label,
input[type='radio']:disabled + .radio-label {
  color: #80868b;
}
input[type='checkbox']:focus + .checkbox-label,
input[type='radio']:focus + .radio-label {
  outline: #2e3436 dotted 1px;
  outline: -webkit-focus-ring-color auto 5px;
}

/** Tweaks for smaller screen sizes */
@media (max-width: 700px) {
  .show-options {
    grid-template-columns: auto 0;
  }
  .show-options .scrim {
    display: block;
  }
  .appbar,
  .symbols {
    padding: 0 16px;
  }
  .appbar-progress {
    margin: 0 -16px;
    width: calc(100% + 32px);
  }
}