css/styles.css

@import url('https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,300;0,400;0,600;0,700;1,400&display=swap');

body {
  margin: 0;
  font-family: 'Open Sans', 'Arial', sans-serif;
}

[hidden] {
  display: none;
}

.header {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  position: fixed;
  top: 0;
  width: calc(100% - 16px);
  padding: 8px 8px;
  background-color: #f3f3f3;
  box-shadow: black 0 -1px 4px;
  z-index: 100;
}

.header .header-logo {
  display: flex;
  flex: 1;
}

.header .header-logo img {
  height: 42px;
}

.header button {
  margin-left: 8px;
}

.app-content {
  max-width: min(calc(100% - 32px), 800px);
  margin: 74px auto 16px auto;
}

.hero-message {
  background: orange;
  color: black;
  border-radius: 4px;
  padding: 16px;
  margin-bottom: 16px;
}

.message {
  text-align: center;
}

.message-icon {
  display: inline-block;
  width: 64px;
  fill: #0277BD;
}

.message.message--error .message-icon {
  fill: #D50000;
}

.message-title {
  margin: 4px 0;
}

.message-text {
  margin: 8px 0;
}

.booklet-header {
  text-align: center;
  margin-bottom: 18px;
}

.booklet-header--invisible {
  display: none;
}

.booklet-header .booklet-header-title {
  margin: 0;
  font-size: 30px;
}

.booklet-header .booklet-header-subtitle {
  margin: 0;
  font-size: 18px;
}

.song {
  position: relative;
  border: solid 1px gray;
  border-radius: 3px;
  padding: 12px;
  margin-bottom: 18px;
  box-shadow: #bdbdbd 0 1px 3px;
}

.song .song-time {
  position: absolute;
  top: 12px;
  right: 12px;
}

.song .song-title {
  margin-top: 0;
  margin-bottom: 4px;
  font-size: 20px;
}

.song .song-author {
  font-style: italic;
  margin-bottom: 8px;
}

.song .performers .performers-item {
  margin-bottom: 2px;
}

.song .performers .instrument {
  font-weight: 600;
  text-decoration: underline;
}

.update-available {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px;
  background: black;
  color: white;
}

button.primary-btn {
  font-family: inherit;
  font-size: 100%;
  line-height: 1.15;
  margin: 0;
  text-transform: none;
  -webkit-appearance: button;
  border: 0;
  border-radius: 4px;
  padding: 8px;
  color: white;
  background-color: #0277BD;
  cursor: pointer;
}

button.primary-btn:hover {
  background-color: #1591DC;
}

button.primary-btn:active {
  background-color: #22A3F1;
}

/* Section adapted from
 * https://chromium.googlesource.com/infra/infra/+/master/appengine/monorail/static_src/elements/projects/mr-projects-page/mr-projects-page.js
 * Copyright 2019 The Chromium Authors. All rights reserved.
 * License: https://chromium.googlesource.com/infra/infra/+/master/LICENSE
 **/
.concerts-list {
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
  width: 100%;
  padding: 0.5em 0;
  margin-bottom: 3em;
}

.concert {
  text-align: left;
  width: 200px;
  margin-left: 16px;
  margin-right: 16px;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  border-radius: 4px;
  border: 1px solid #aaa;
  padding: 16px;
  font-weight: normal;
  line-height: 16px;
  transition: all 0.1s ease-in-out;
}

.concert:hover {
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 2px 6px hsla(0,0%,0%,0.12),
    0 1px 3px hsla(0,0%,0%,0.24);
}

.concert-title {
  font-size: 16px;
  line-height: 24px;
  margin: 0;
  margin-bottom: 16px;
  padding-top: 0.1em;
  padding-bottom: 16px;
  letter-spacing: 0.1px;
  font-weight: 600;
  width: 100%;
  border-bottom: 1px solid #aaa;
}

.concert-subtitle {
  margin: 0 0 32px;
  flex-grow: 1;
  line-height: initial;
}

.linkify {
  display: inline;
  padding: 0px;
  margin: 0px;
  border: 0px;
  background: 0px center;
  cursor: pointer;
  color: #0277BD;
}

.concert-btn {
  text-transform: uppercase;
  margin: 0px;
  font-weight: 600;
  flex-grow: 0;
}
/* End of section */

/* DARK THEME */
@media screen {
  .dark-theme {
    background-color: #111;
    color: white;
  }

  .dark-theme .header {
    color: white;
    background-color: #0c0c0c;
    box-shadow: white 0 -1px 4px;
  }

  .dark-theme .header-logo {
    filter: invert(1);
  }

  .dark-theme .song {
    box-shadow: none;
  }

  .dark-theme .update-available {
    background: white;
    color: black;
  }

  .dark-theme .concert:hover {
    box-shadow: 0 2px 6px hsla(0,0%,100%,0.12),
      0 1px 3px hsla(0,0%,100%,0.24);
  }

  .dark-theme .linkify {
    color: #4cb9fb;
  }
}

@media print {
  .header {
    position: absolute;
    box-shadow: none;
    border-bottom: solid 1px gray;
  }

  .booklet-header--invisible {
    display: block;
  }

  .booklet-custom-header {
    display: none;
  }

  .song {
    break-inside: avoid-page;
    box-shadow: none;
    margin-bottom: 12px;
    padding: 6px 12px;
  }

  .song .song-title {
    margin-bottom: 3px;
  }

  .song .song-author {
    margin-bottom: 6px;
  }

  .song .performers .performers-item {
    margin-bottom: 1.5px;
  }

  #previous-concerts-btn {
    display: none;
  }
}