style.css

/*
* Copyright 2018 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
* 
*     https://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.
*/
@import url('https://fonts.googleapis.com/css?family=Roboto:300,400,700|Roboto+Mono:400,700');
@import url('https://themes.googleusercontent.com/fonts/css?kit=Ry7ZpkCWHRNK4QK2VqZc1A');

body {
  font-family: 'Roboto', sans-serif;
  margin: 0;
  min-width: 640px;
  font-size: 18px;
  line-height: 24px;
}

.content, .alt-content {
  padding: 80px 0 20px;
  min-height: calc(100vh - 155px);
}

pre {
  font-family: 'Roboto Mono', monospace;
  font-size: 16px;
  line-height: 20px;
  overflow-x: auto;
}

a img {
  border: 0;
}

.top .title {
  font-size: 35px;
  padding-left: 25px;
}

.top .title::before,
.top .right::before,
.bottom::before {
  content: "";
  height: 50px;
  display: inline-block;
}

.right {
  position: absolute;
  right: 25px;
  top: 0;
}

.top {
  background-color: #4285f4; /* blue */
  box-shadow: 2px 0 5px #2c3539;
  height: 80px;
  color: white;
  font-family: 'Google Sans', sans-serif;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  min-width: 640px;
  z-index: 1;
}

.top a {
  font-size: 24px;
  margin-left: 10px;
  padding: 10px 5px;
  text-decoration: none;
}

.top a:visited, .top a {
  color: white;
}

.top a:hover {
  background-color: #396bbc;  /* dark blue */
}

.bottom {
 position: relative;
 height: 55px;
 z-index: 1;
 background: red;
 background: #eceff1;
}

.bottom img {
  position: absolute;
  left: 25px;
  top: 15px;
  opacity: .54;
}

.bottom a {
  font-size: 12px;
  padding-left: 10px;
  text-decoration: none;
}

.bottom a,
.bottom a:visited {
  color: #4285f4;  /* dark blue */
}

.bottom .right {
  top: 25px;
}

.section {
  padding: 45px 75px;
}

.content .section:nth-child(even),
.alt-content .section:nth-child(odd) {
  background: #eee;
}

.textblock {
  max-width: 960px;
  margin: auto;
}

.nobreak {
  white-space: nowrap;
}

h1,h2,h3 {
  font-family: 'Google Sans', sans-serif;
  color: #4285f4;  /* blue */
  margin: 0;
  margin-left: -50px;
  padding: 10px 0 2px;
}

h1 {
  font-size: 35px;
  font-weight: bold;
}

h2 {
  font-size: 35px;
  font-weight: normal;
}

h3 {
  font-size: 28px;
  font-weight: normal;
}

.equation {
  display: block;
  white-space: nowrap;
  overflow-x: auto;
  text-align: center;
}
.equation > * {
  vertical-align: middle;
}
.equation td { padding: 0 .4em; }
.lbrack, .rbrack {
  display: inline-block;
  height: 4em;
  border: 2px solid black;
  width: 5px;
}
.lbrack { border-right: none; }
.rbrack { border-left: none; }
.inline { display: inline-block; }

.centered {
  text-align: center;
}

.ref {
  color: #3367d6;
  font-weight: bold;
  text-decoration: none;
}

.author {
  display: inline-block;
  background: #efefef;
  height: 80px;
  line-height: 80px;
  margin-right: 20px;
  padding: 5px;
  width: 250px;
  font-weight: bold;
  border: 1px solid #4285f4; /* blue */
}

.author img {
  height: 80px;
  vertical-align: middle;
  margin-right: 20px;
}

.button {
  background-color: #4285f4; /* blue */
  border: none;
  color: white;
  cursor: pointer;
  display: inline-block;
  font-family: 'Google Sans', sans-serif;
  font-size: 16px;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
}

.button:hover {
  background-color: #396bbc;  /* dark blue */
}