* {
  margin: 0;
  padding: 0;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
.group:before,
.group:after {
  content: "";
  display: table;
}
.group:after {
  clear: both;
}
.group {
  zoom: 1;
}
body {
  background-color: #fff;
  font-family: arial;
  font-size: 100%;
}
.item {
  padding: 10px;
  width: 25%;
  float: left;
}
.item .block {
  padding-bottom: 100%;
  -webkit-border-radius: 6px;
  border-radius: 6px;
}
.item:nth-child(1) .block {
  background-color: #9f9f9f;
}
.item:nth-child(2) .block {
  background-color: #999;
}
.item:nth-child(3) .block {
  background-color: #7f7f7f;
}
.item:nth-child(4) .block {
  background-color: #7b7b7b;
}
.item:nth-child(5) .block {
  background-color: #888;
}
.item:nth-child(6) .block {
  background-color: #969696;
}
.item:nth-child(7) .block {
  background-color: #a6a6a6;
}
.item:nth-child(8) .block {
  background-color: #747474;
}
.item:nth-child(9) .block {
  background-color: #6c6c6c;
}
.item:nth-child(10) .block {
  background-color: #828282;
}
.item:nth-child(11) .block {
  background-color: #737373;
}
.item:nth-child(12) .block {
  background-color: #bdbdbd;
}
.item:nth-child(13) .block {
  background-color: #b3b3b3;
}
.item:nth-child(14) .block {
  background-color: #858585;
}
.item:nth-child(15) .block {
  background-color: #aaa;
}
.item:nth-child(16) .block {
  background-color: #8a8a8a;
}
.item:nth-child(17) .block {
  background-color: #8c8c8c;
}
.item:nth-child(18) .block {
  background-color: #767676;
}
.item:nth-child(19) .block {
  background-color: #989898;
}
.item:nth-child(20) .block {
  background-color: #8e8e8e;
}
.item:nth-child(21) .block {
  background-color: #b7b7b7;
}
.item:nth-child(22) .block {
  background-color: #a7a7a7;
}
.item:nth-child(23) .block {
  background-color: #747474;
}
.item:nth-child(24) .block {
  background-color: #bebebe;
}
.item:nth-child(25) .block {
  background-color: #686868;
}
.item:nth-child(26) .block {
  background-color: #696969;
}
.item:nth-child(27) .block {
  background-color: #a6a6a6;
}
.item:nth-child(28) .block {
  background-color: #787878;
}
.item:nth-child(29) .block {
  background-color: #848484;
}
.item:nth-child(30) .block {
  background-color: #8d8d8d;
}
.item:nth-child(31) .block {
  background-color: #ababab;
}
.item:nth-child(32) .block {
  background-color: #adadad;
}
.item:nth-child(33) .block {
  background-color: #777;
}
.item:nth-child(34) .block {
  background-color: #b1b1b1;
}
.item:nth-child(35) .block {
  background-color: #898989;
}
.item:nth-child(36) .block {
  background-color: #747474;
}
.item:nth-child(37) .block {
  background-color: #b1b1b1;
}
.item:nth-child(38) .block {
  background-color: #c4c4c4;
}
.item:nth-child(39) .block {
  background-color: #868686;
}
.item:nth-child(40) .block {
  background-color: #6b6b6b;
}
.item:nth-child(41) .block {
  background-color: #7a7a7a;
}
.item:nth-child(42) .block {
  background-color: #909090;
}
.item:nth-child(43) .block {
  background-color: #707070;
}
.item:nth-child(44) .block {
  background-color: #737373;
}
.item:nth-child(45) .block {
  background-color: #747474;
}
.item:nth-child(46) .block {
  background-color: #b4b4b4;
}
.item:nth-child(47) .block {
  background-color: #959595;
}
.item:nth-child(48) .block {
  background-color: #a4a4a4;
}
.item:nth-child(49) .block {
  background-color: #7b7b7b;
}
.item:nth-child(50) .block {
  background-color: #7a7a7a;
}
.item:nth-child(51) .block {
  background-color: #acacac;
}
.item:nth-child(52) .block {
  background-color: #c4c4c4;
}
.item:nth-child(53) .block {
  background-color: #6f6f6f;
}
.item:nth-child(54) .block {
  background-color: #898989;
}
.item:nth-child(55) .block {
  background-color: #bebebe;
}
.item:nth-child(56) .block {
  background-color: #9b9b9b;
}
.item:nth-child(57) .block {
  background-color: #9b9b9b;
}
.item:nth-child(58) .block {
  background-color: #9e9e9e;
}
.item:nth-child(59) .block {
  background-color: #686868;
}
.item:nth-child(60) .block {
  background-color: #b2b2b2;
}
header {
  text-align: center;
  background-color: #34495e;
}
header .wrapper {
  margin: 0 auto;
  padding: 64px 10px;
  width: 960px;
  color: #ecf0f1;
}
header h1 {
  margin-bottom: 10px;
  font-size: 3em;
  font-weight: bold;
  line-height: 1em;
}
header p {
  margin-bottom: 20px;
}
header .button {
  padding: 10px 20px;
  display: inline-block;
  color: #f1c40f;
  text-decoration: none;
  border: 2px solid #f1c40f;
  -webkit-border-radius: 6px;
  border-radius: 6px;
}
.section .wrapper {
  margin: 0 auto;
  padding: 52px 0;
  width: 960px;
}
.section.section-code {
  background-color: #ecf0f1;
}
.section.section-code .wrapper {
  padding: 52px 10px;
}
.section.section-code p,
.section.section-code code {
  margin-bottom: 20px;
}
.section.section-code a {
  color: #2980b9;
}
.section.section-code code {
  padding: 20px;
  display: block;
  background-color: #fff;
  -webkit-border-radius: 6px;
  border-radius: 6px;
  border: 2px solid #bdc3c7;
}
.section.section-code code:last-child {
  margin-bottom: 0;
}
.section .buttons {
  padding-bottom: 52px;
  text-align: center;
}
.section .buttons .button {
  padding: 20px;
  display: inline-block;
  color: #fff;
  background-color: #2980b9;
  text-decoration: none;
  -webkit-border-radius: 4px;
  border-radius: 4px;
}
footer {
  background-color: #34495e;
  text-align: right;
}
footer .wrapper {
  margin: 0 auto;
  padding: 32px 10px;
  width: 960px;
  font-size: 0.875em;
  color: #ecf0f1;
}
footer a {
  color: #ecf0f1;
  text-decoration: none;
  border-bottom: 1px solid rgba(236,240,241,0.5);
}
section.modal {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background-color: rgba(0,0,0,0.5);
}
section.modal .modal-container,
section.modal .modal-middle {
  width: 100%;
  height: 100%;
}
section.modal .modal-container {
  display: table;
}
section.modal .modal-middle {
  display: table-cell;
  text-align: center;
  vertical-align: middle;
}
section.modal .modal-box {
  margin: 40px auto;
  padding: 10px;
  width: 280px;
  background-color: #fff;
  -webkit-border-radius: 4px;
  border-radius: 4px;
  -webkit-box-shadow: 0 12px 48px 0 rgba(0,0,0,0.25);
  box-shadow: 0 12px 48px 0 rgba(0,0,0,0.25);
}
section.modal .modal-box h2,
section.modal .modal-box p {
  margin-bottom: 20px;
}
section.modal .modal-box h2 {
  font-size: 1.5em;
  line-height: 1em;
}
section.modal .modal-box .boxs {
  margin-bottom: 20px;
}
section.modal .modal-box .buttons .button {
  display: block;
  width: 100%;
  height: 32px;
  font-family: arial;
  font-size: 1em;
  color: #2980b9;
  line-height: 30px;
  border: 2px solid #2980b9;
  -webkit-border-radius: 4px;
  border-radius: 4px;
  background-color: #fff;
}
@media screen and (max-width: 960px) {
  body {
    min-width: 320px;
  }
  header .wrapper {
    margin: 0;
    width: 100%;
  }
  .section .wrapper {
    margin: 0;
    width: 100%;
  }
  footer .wrapper {
    margin: 0;
    width: 100%;
  }
}
@media screen and (max-width: 480px) {
  .section .wrapper {
    margin: 0;
    width: 100%;
  }
}