* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  background: #535a89;
  color: #fff;
  font-family: 'Open Sans', Helvetica, Arial, sans-serif;
  font-size: 20px;
  font-weight: 300;
  min-height: 100%;
}

body {
  font-size: 100%;
}

ul {
  list-style-type: none;
}

a {
  color: #fff;
  text-decoration: none;
  transition: 0.4s ease-in-out;
}

a:active,
a:focus,
a:hover {
  color: #fff;
}

h2 {
  font-size: 30px;
}

.c {
  display: block;
  margin-bottom: 20px;
  padding: 20px;
  transition: 0.4s ease-in-out;
}

.c:active,
.c:focus,
.c:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: #fff;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

.c.i {
  opacity: 0.35;
}

.c.a {
  animation: flash 1s;
}

.w {
  margin: 40px;
  max-width: 100%;
}

@keyframes flash {
  from, 50%, to {
    opacity: 1;
  }

  25%, 75% {
    opacity: 0;
  }
}