body {
  background-color: #f9f9f9;
  color: #333;
  font-family: "proxima-nova","Helvetica Neue",Helvetica,Arial,sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

a {
  text-decoration: none;
}

* {
  box-sizing: content-box !important;
  -webkit-box-sizing: content-box !important;
}

.error-wrap {
  background-color: #fff;
  border: 1px solid #dde4e6;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.05);
  margin: 0 auto;
  padding: 36px 24px;
  position: fixed;
  top: 50%;
  left: 50%;
  margin-top: -148px;
  margin-left: -324px;
  width: 600px;
}

.error-message {
  overflow: hidden;
}

.error-message span {
  box-sizing: border-box;
  background-color: #f0f0f0;
  border-radius: 50%;
  color: #666;
  display: block;
  font-size: 64px;
  font-weight: 600;
  float: left;
  line-height: 1;
  text-align: center;
  height: 140px;
  line-height: 140px;
  text-shadow: 2px 2px 0 #fff;
  width: 140px;
}

.error-message .page-header {
  box-sizing: border-box;
  color: #666;
  display: block;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
  margin: 0;
  width: 425px;
  float: right;
  padding: 0;
  background-color: transparent;
  border-bottom: none;
}

.error-message .page-header strong {
  color: #333;
  display: block;
  font-size: 64px;
  font-weight: 600;
  margin-bottom: 6px;
}

.btn-actions {
  padding-left: 178px;
}

.btn-actions a {
  background-color: #27ae60;
  border-radius: 2px;
  border: 0;
  color: #fff;
  display: inline-block;
  font-weight: 600;
  letter-spacing: 1px;
  padding: 12px 24px;
  text-shadow: 1px 1px 0 #229a55;
  text-transform: uppercase;
  transition: all 0.35s;
}

.btn-actions a:hover,
.btn-actions a:focus,
.btn-actions a:active {
  background-color: #208f4f;
}

.error-wrap ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* RESPONSIVE */
@media screen and (max-width: 640px) {
  body {
    background-color: #fff;
    margin: 0;
    padding: 0 24px;
  }

  .error-wrap {
    border: 0;
    box-shadow: none;
    box-sizing: border-box;
    padding: 0;
    position: relative;
    margin: 48px 0;
    left: auto;
    top: auto;
    width: 100%;
  }  
}

@media screen and (max-width: 480px) {
  .error-wrap {
    border: 0;
    box-shadow: none;
    margin: 48px 0;
    padding: 0;
  }

  .error-message span {
    float: none;
    margin: 0 auto 24px;
  }

  .error-message .page-header {
    float: none;
    line-height: 1.4;
    margin-bottom: 24px;
    text-align: center;
    width: 100%;
  }

  .btn-actions {
    padding-left: 0;
    text-align: center;
  }
}