yii2-swiftmailer/apps/basic/web/css/site.css

body {
  padding-top: 20px;
}

/* Everything but the jumbotron gets side spacing for mobile-first views */
.masthead,
.body-content,
.footer {
  padding-left: 15px;
  padding-right: 15px;
}

.masthead:before,
.masthead:after {
  display: table;
  content: " ";
}
.masthead:after {
	clear: both;
}

.footer {
  border-top: 1px solid #ddd;
  margin-top: 30px;
  padding-top: 29px;
  padding-bottom: 30px;
}

/* Main marketing message and sign up button */
.jumbotron {
  text-align: center;
  background-color: transparent;
}
.jumbotron .btn {
  font-size: 21px;
  padding: 14px 24px;
}

/* Customize the nav-justified links to be fill the entire space of the .navbar */
.nav-justified {
  max-height: 50px;
  background-color: #eee;
  border-radius: 5px;
  border: 1px solid #ccc;
}
.nav-justified > li > a {
  padding-top: 15px;
  padding-bottom: 15px;
  color: #777;
  font-weight: bold;
  text-align: center;
  border-left: 1px solid rgba(255,255,255,.75);
  border-right: 1px solid rgba(0,0,0,.1);
  background-color: #e5e5e5; /* Old browsers */
  background-repeat: repeat-x; /* Repeat the gradient */
  background-image: -moz-linear-gradient(top, #f5f5f5 0%, #e5e5e5 100%); /* FF3.6+ */
  background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#f5f5f5), color-stop(100%,#e5e5e5)); /* Chrome,Safari4+ */
  background-image: -webkit-linear-gradient(top, #f5f5f5 0%,#e5e5e5 100%); /* Chrome 10+,Safari 5.1+ */
  background-image: -ms-linear-gradient(top, #f5f5f5 0%,#e5e5e5 100%); /* IE10+ */
  background-image: -o-linear-gradient(top, #f5f5f5 0%,#e5e5e5 100%); /* Opera 11.10+ */
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#f5f5f5', endColorstr='#e5e5e5',GradientType=0 ); /* IE6-9 */
  background-image: linear-gradient(top, #f5f5f5 0%,#e5e5e5 100%); /* W3C */
}
.nav-justified > .active > a {
  background-color: #ddd;
  background-image: none;
  box-shadow: inset 0 3px 7px rgba(0,0,0,.15);
}
.nav-justified > li:first-child > a {
  border-left: 0;
  border-top-left-radius: 5px;
  border-bottom-left-radius: 5px;
}
.nav-justified > li:last-child > a {
  border-right: 0;
  border-top-right-radius: 5px;
  border-bottom-right-radius: 5px;
}


/* Responsive: Portrait tablets and up */
@media screen and (min-width: 768px) {
  /* Remove the padding we set earlier */
  .masthead,
  .marketing,
  .footer {
    padding-left: 0;
    padding-right: 0;
  }
}