index.css

/*
 * Copyright 2021 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

 body{
    margin: 0;
    font-family: sans-serif;
    background: rgb(241,246,255);
    background: linear-gradient(0deg, rgba(241,246,255,1) 0%, rgba(240,243,255,1) 100%);

    --border-color: #aaa;
    --bg-color: rgba(255, 255, 255, .7);
}
.main_wrapper {
    width: calc(100% - 10px);
    max-width: 800px;
    margin: 20px auto;
}

#video_config {
    display: grid;
    grid-template-columns: auto auto .4fr .6fr;
    row-gap: 10px;
}

.sample-text-wrapper {
    width: 100%;
    margin-top: 5px;
    grid-column-start: 1;
    grid-column-end: 5;
    display: flex;
}

#sample-text {
    padding: 0 10px;
    line-height: 40px;
    font-family: sans-serif;
    font-size: 16px;
    flex: 1;

    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 2px;
}

.slider-content, .range-label, .range-value {
    line-height: 40px;

    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
}

.range-label {
    padding-left: 10px;
    border-right: none;
    border-radius: 2px 0 0 2px;
}
.range-value {
    width: 50px;
    text-align: end;
    padding: 0 10px 0 0;
    border-left: none;
    border-right: none;
}
.slider-content {
    border-left: none;
    border-radius: 0 2px 2px 0;
}


#rate, #pitch, #volume-factor {
    vertical-align: middle;
}

#video_config h3 {
    grid-column-start: 1;
    grid-column-end: 4;
    grid-column-start: 1;
    grid-column-end: 4;
    margin: 0;
    padding: 15px 0 0;
}

#video_config h3, #voice-title {
    display: block;
    font-size: 16px;
    font-weight: 700;
    color: #555;
}

.range-container {
    text-align: center;
}

input[type=range] {
    width: calc(100% - 20px);
}

#voice-list-wrapper {
    min-height: 40px;
    grid-column-start: 4;
    grid-row-start: 2;
    grid-row-end: 6;
    margin-left: 10px;
    position: relative;
}

@media screen and (max-width: 600px) {
    #video_config {
        grid-template-columns: auto auto 1fr;
    }
    .sample-text-wrapper {
        grid-column-end: 4;
    }
    
    #voice-list-wrapper {
        min-height: 250px;
        grid-column-start: 1;
        grid-column-end: 4;
        grid-row-start: auto;
        grid-row-end: auto;
    }
    #voice-list-wrapper {
        margin: 15px 0 0 0;
    }
}
#voice-list {
    margin: 5px 0 0 0;
    display: block;
    width: 100%;
    top: 20px;
    bottom: 0;
    position: absolute;

    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
}


#bookmarklet {
    display: inline-block;
    border: 1px solid;
    padding: 5px;
    background: #eee;
    border-radius: 3px;
    cursor: pointer;
    user-select: none;
    text-decoration: none;
    color: #333;
}