yii2-bootstrap/framework/yii/bootstrap/assets/css/bootstrap-theme.css

.btn-default,
.btn-primary,
.btn-success,
.btn-info,
.btn-warning,
.btn-danger {
  text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.2);
  -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15), 0 1px 1px rgba(0, 0, 0, 0.075);
          box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15), 0 1px 1px rgba(0, 0, 0, 0.075);
}

.btn-default:active,
.btn-primary:active,
.btn-success:active,
.btn-info:active,
.btn-warning:active,
.btn-danger:active,
.btn-default.active,
.btn-primary.active,
.btn-success.active,
.btn-info.active,
.btn-warning.active,
.btn-danger.active {
  -webkit-box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
          box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
}

.btn:active,
.btn.active {
  background-image: none;
}

.btn-default {
  text-shadow: 0 1px 0 #fff;
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#ffffff), to(#e6e6e6));
  background-image: -webkit-linear-gradient(top, #ffffff, 0%, #e6e6e6, 100%);
  background-image: -moz-linear-gradient(top, #ffffff 0%, #e6e6e6 100%);
  background-image: linear-gradient(to bottom, #ffffff 0%, #e6e6e6 100%);
  background-repeat: repeat-x;
  border-color: #e0e0e0;
  border-color: #ccc;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffffff', endColorstr='#ffe6e6e6', GradientType=0);
}

.btn-default:active,
.btn-default.active {
  background-color: #e6e6e6;
  border-color: #e0e0e0;
}

.btn-primary {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#428bca), to(#3071a9));
  background-image: -webkit-linear-gradient(top, #428bca, 0%, #3071a9, 100%);
  background-image: -moz-linear-gradient(top, #428bca 0%, #3071a9 100%);
  background-image: linear-gradient(to bottom, #428bca 0%, #3071a9 100%);
  background-repeat: repeat-x;
  border-color: #2d6ca2;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff428bca', endColorstr='#ff3071a9', GradientType=0);
}

.btn-primary:active,
.btn-primary.active {
  background-color: #3071a9;
  border-color: #2d6ca2;
}

.btn-success {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#5cb85c), to(#449d44));
  background-image: -webkit-linear-gradient(top, #5cb85c, 0%, #449d44, 100%);
  background-image: -moz-linear-gradient(top, #5cb85c 0%, #449d44 100%);
  background-image: linear-gradient(to bottom, #5cb85c 0%, #449d44 100%);
  background-repeat: repeat-x;
  border-color: #419641;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff5cb85c', endColorstr='#ff449d44', GradientType=0);
}

.btn-success:active,
.btn-success.active {
  background-color: #449d44;
  border-color: #419641;
}

.btn-warning {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#f0ad4e), to(#ec971f));
  background-image: -webkit-linear-gradient(top, #f0ad4e, 0%, #ec971f, 100%);
  background-image: -moz-linear-gradient(top, #f0ad4e 0%, #ec971f 100%);
  background-image: linear-gradient(to bottom, #f0ad4e 0%, #ec971f 100%);
  background-repeat: repeat-x;
  border-color: #eb9316;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff0ad4e', endColorstr='#ffec971f', GradientType=0);
}

.btn-warning:active,
.btn-warning.active {
  background-color: #ec971f;
  border-color: #eb9316;
}

.btn-danger {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#d9534f), to(#c9302c));
  background-image: -webkit-linear-gradient(top, #d9534f, 0%, #c9302c, 100%);
  background-image: -moz-linear-gradient(top, #d9534f 0%, #c9302c 100%);
  background-image: linear-gradient(to bottom, #d9534f 0%, #c9302c 100%);
  background-repeat: repeat-x;
  border-color: #c12e2a;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffd9534f', endColorstr='#ffc9302c', GradientType=0);
}

.btn-danger:active,
.btn-danger.active {
  background-color: #c9302c;
  border-color: #c12e2a;
}

.btn-info {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#5bc0de), to(#31b0d5));
  background-image: -webkit-linear-gradient(top, #5bc0de, 0%, #31b0d5, 100%);
  background-image: -moz-linear-gradient(top, #5bc0de 0%, #31b0d5 100%);
  background-image: linear-gradient(to bottom, #5bc0de 0%, #31b0d5 100%);
  background-repeat: repeat-x;
  border-color: #2aabd2;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff5bc0de', endColorstr='#ff31b0d5', GradientType=0);
}

.btn-info:active,
.btn-info.active {
  background-color: #31b0d5;
  border-color: #2aabd2;
}

.thumbnail,
.img-thumbnail {
  -webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.075);
          box-shadow: 0 1px 2px rgba(0, 0, 0, 0.075);
}

.dropdown-menu > li > a:hover,
.dropdown-menu > li > a:focus,
.dropdown-menu > .active > a,
.dropdown-menu > .active > a:hover,
.dropdown-menu > .active > a:focus {
  background-color: #357ebd;
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#428bca), to(#357ebd));
  background-image: -webkit-linear-gradient(top, #428bca, 0%, #357ebd, 100%);
  background-image: -moz-linear-gradient(top, #428bca 0%, #357ebd 100%);
  background-image: linear-gradient(to bottom, #428bca 0%, #357ebd 100%);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff428bca', endColorstr='#ff357ebd', GradientType=0);
}

.navbar {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#ffffff), to(#f8f8f8));
  background-image: -webkit-linear-gradient(top, #ffffff, 0%, #f8f8f8, 100%);
  background-image: -moz-linear-gradient(top, #ffffff 0%, #f8f8f8 100%);
  background-image: linear-gradient(to bottom, #ffffff 0%, #f8f8f8 100%);
  background-repeat: repeat-x;
  border-radius: 4px;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffffff', endColorstr='#fff8f8f8', GradientType=0);
  -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15), 0 1px 5px rgba(0, 0, 0, 0.075);
          box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15), 0 1px 5px rgba(0, 0, 0, 0.075);
}

.navbar .navbar-nav > .active > a {
  background-color: #f8f8f8;
}

.navbar-brand,
.navbar-nav > li > a {
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.25);
}

.navbar-inverse {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#3c3c3c), to(#222222));
  background-image: -webkit-linear-gradient(top, #3c3c3c, 0%, #222222, 100%);
  background-image: -moz-linear-gradient(top, #3c3c3c 0%, #222222 100%);
  background-image: linear-gradient(to bottom, #3c3c3c 0%, #222222 100%);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff3c3c3c', endColorstr='#ff222222', GradientType=0);
}

.navbar-inverse .navbar-nav > .active > a {
  background-color: #222222;
}

.navbar-inverse .navbar-brand,
.navbar-inverse .navbar-nav > li > a {
  text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
}

.navbar-static-top,
.navbar-fixed-top,
.navbar-fixed-bottom {
  border-radius: 0;
}

.alert {
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.2);
  -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25), 0 1px 2px rgba(0, 0, 0, 0.05);
          box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25), 0 1px 2px rgba(0, 0, 0, 0.05);
}

.alert-success {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#dff0d8), to(#c8e5bc));
  background-image: -webkit-linear-gradient(top, #dff0d8, 0%, #c8e5bc, 100%);
  background-image: -moz-linear-gradient(top, #dff0d8 0%, #c8e5bc 100%);
  background-image: linear-gradient(to bottom, #dff0d8 0%, #c8e5bc 100%);
  background-repeat: repeat-x;
  border-color: #b2dba1;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffdff0d8', endColorstr='#ffc8e5bc', GradientType=0);
}

.alert-info {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#d9edf7), to(#b9def0));
  background-image: -webkit-linear-gradient(top, #d9edf7, 0%, #b9def0, 100%);
  background-image: -moz-linear-gradient(top, #d9edf7 0%, #b9def0 100%);
  background-image: linear-gradient(to bottom, #d9edf7 0%, #b9def0 100%);
  background-repeat: repeat-x;
  border-color: #9acfea;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffd9edf7', endColorstr='#ffb9def0', GradientType=0);
}

.alert-warning {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#fcf8e3), to(#f8efc0));
  background-image: -webkit-linear-gradient(top, #fcf8e3, 0%, #f8efc0, 100%);
  background-image: -moz-linear-gradient(top, #fcf8e3 0%, #f8efc0 100%);
  background-image: linear-gradient(to bottom, #fcf8e3 0%, #f8efc0 100%);
  background-repeat: repeat-x;
  border-color: #f5e79e;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fffcf8e3', endColorstr='#fff8efc0', GradientType=0);
}

.alert-danger {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#f2dede), to(#e7c3c3));
  background-image: -webkit-linear-gradient(top, #f2dede, 0%, #e7c3c3, 100%);
  background-image: -moz-linear-gradient(top, #f2dede 0%, #e7c3c3 100%);
  background-image: linear-gradient(to bottom, #f2dede 0%, #e7c3c3 100%);
  background-repeat: repeat-x;
  border-color: #dca7a7;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff2dede', endColorstr='#ffe7c3c3', GradientType=0);
}

.progress {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#ebebeb), to(#f5f5f5));
  background-image: -webkit-linear-gradient(top, #ebebeb, 0%, #f5f5f5, 100%);
  background-image: -moz-linear-gradient(top, #ebebeb 0%, #f5f5f5 100%);
  background-image: linear-gradient(to bottom, #ebebeb 0%, #f5f5f5 100%);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffebebeb', endColorstr='#fff5f5f5', GradientType=0);
}

.progress-bar {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#428bca), to(#3071a9));
  background-image: -webkit-linear-gradient(top, #428bca, 0%, #3071a9, 100%);
  background-image: -moz-linear-gradient(top, #428bca 0%, #3071a9 100%);
  background-image: linear-gradient(to bottom, #428bca 0%, #3071a9 100%);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff428bca', endColorstr='#ff3071a9', GradientType=0);
}

.progress-bar-success {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#5cb85c), to(#449d44));
  background-image: -webkit-linear-gradient(top, #5cb85c, 0%, #449d44, 100%);
  background-image: -moz-linear-gradient(top, #5cb85c 0%, #449d44 100%);
  background-image: linear-gradient(to bottom, #5cb85c 0%, #449d44 100%);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff5cb85c', endColorstr='#ff449d44', GradientType=0);
}

.progress-bar-info {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#5bc0de), to(#31b0d5));
  background-image: -webkit-linear-gradient(top, #5bc0de, 0%, #31b0d5, 100%);
  background-image: -moz-linear-gradient(top, #5bc0de 0%, #31b0d5 100%);
  background-image: linear-gradient(to bottom, #5bc0de 0%, #31b0d5 100%);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff5bc0de', endColorstr='#ff31b0d5', GradientType=0);
}

.progress-bar-warning {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#f0ad4e), to(#ec971f));
  background-image: -webkit-linear-gradient(top, #f0ad4e, 0%, #ec971f, 100%);
  background-image: -moz-linear-gradient(top, #f0ad4e 0%, #ec971f 100%);
  background-image: linear-gradient(to bottom, #f0ad4e 0%, #ec971f 100%);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff0ad4e', endColorstr='#ffec971f', GradientType=0);
}

.progress-bar-danger {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#d9534f), to(#c9302c));
  background-image: -webkit-linear-gradient(top, #d9534f, 0%, #c9302c, 100%);
  background-image: -moz-linear-gradient(top, #d9534f 0%, #c9302c 100%);
  background-image: linear-gradient(to bottom, #d9534f 0%, #c9302c 100%);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffd9534f', endColorstr='#ffc9302c', GradientType=0);
}

.list-group {
  border-radius: 4px;
  -webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.075);
          box-shadow: 0 1px 2px rgba(0, 0, 0, 0.075);
}

.list-group-item.active,
.list-group-item.active:hover,
.list-group-item.active:focus {
  text-shadow: 0 -1px 0 #3071a9;
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#428bca), to(#3278b3));
  background-image: -webkit-linear-gradient(top, #428bca, 0%, #3278b3, 100%);
  background-image: -moz-linear-gradient(top, #428bca 0%, #3278b3 100%);
  background-image: linear-gradient(to bottom, #428bca 0%, #3278b3 100%);
  background-repeat: repeat-x;
  border-color: #3278b3;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff428bca', endColorstr='#ff3278b3', GradientType=0);
}

.panel {
  -webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
          box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.panel-default > .panel-heading {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#f5f5f5), to(#e8e8e8));
  background-image: -webkit-linear-gradient(top, #f5f5f5, 0%, #e8e8e8, 100%);
  background-image: -moz-linear-gradient(top, #f5f5f5 0%, #e8e8e8 100%);
  background-image: linear-gradient(to bottom, #f5f5f5 0%, #e8e8e8 100%);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff5f5f5', endColorstr='#ffe8e8e8', GradientType=0);
}

.panel-primary > .panel-heading {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#428bca), to(#357ebd));
  background-image: -webkit-linear-gradient(top, #428bca, 0%, #357ebd, 100%);
  background-image: -moz-linear-gradient(top, #428bca 0%, #357ebd 100%);
  background-image: linear-gradient(to bottom, #428bca 0%, #357ebd 100%);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff428bca', endColorstr='#ff357ebd', GradientType=0);
}

.panel-success > .panel-heading {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#dff0d8), to(#d0e9c6));
  background-image: -webkit-linear-gradient(top, #dff0d8, 0%, #d0e9c6, 100%);
  background-image: -moz-linear-gradient(top, #dff0d8 0%, #d0e9c6 100%);
  background-image: linear-gradient(to bottom, #dff0d8 0%, #d0e9c6 100%);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffdff0d8', endColorstr='#ffd0e9c6', GradientType=0);
}

.panel-info > .panel-heading {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#d9edf7), to(#c4e3f3));
  background-image: -webkit-linear-gradient(top, #d9edf7, 0%, #c4e3f3, 100%);
  background-image: -moz-linear-gradient(top, #d9edf7 0%, #c4e3f3 100%);
  background-image: linear-gradient(to bottom, #d9edf7 0%, #c4e3f3 100%);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffd9edf7', endColorstr='#ffc4e3f3', GradientType=0);
}

.panel-warning > .panel-heading {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#fcf8e3), to(#faf2cc));
  background-image: -webkit-linear-gradient(top, #fcf8e3, 0%, #faf2cc, 100%);
  background-image: -moz-linear-gradient(top, #fcf8e3 0%, #faf2cc 100%);
  background-image: linear-gradient(to bottom, #fcf8e3 0%, #faf2cc 100%);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fffcf8e3', endColorstr='#fffaf2cc', GradientType=0);
}

.panel-danger > .panel-heading {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#f2dede), to(#ebcccc));
  background-image: -webkit-linear-gradient(top, #f2dede, 0%, #ebcccc, 100%);
  background-image: -moz-linear-gradient(top, #f2dede 0%, #ebcccc 100%);
  background-image: linear-gradient(to bottom, #f2dede 0%, #ebcccc 100%);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff2dede', endColorstr='#ffebcccc', GradientType=0);
}

.well {
  background-image: -webkit-gradient(linear, left 0%, left 100%, from(#e8e8e8), to(#f5f5f5));
  background-image: -webkit-linear-gradient(top, #e8e8e8, 0%, #f5f5f5, 100%);
  background-image: -moz-linear-gradient(top, #e8e8e8 0%, #f5f5f5 100%);
  background-image: linear-gradient(to bottom, #e8e8e8 0%, #f5f5f5 100%);
  background-repeat: repeat-x;
  border-color: #dcdcdc;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffe8e8e8', endColorstr='#fff5f5f5', GradientType=0);
  -webkit-box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 0 rgba(255, 255, 255, 0.1);
          box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 0 rgba(255, 255, 255, 0.1);
}