index.css

body,
html {
  height: 100%;
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
}

body {
  background: #100a1c;
  background-image: radial-gradient(50% 30% ellipse at center top, #201e40 0%, rgba(0, 0, 0, 0) 100%), radial-gradient(60% 50% ellipse at center bottom, #261226 0%, #100a1c 100%);
  background-attachment: fixed;
  color: #eee;
  font-size: 18px;
}

body {
  font-family: Inconsolata, monospace;
}

code,
h1,
h2,
h3,
pre {
  color: #fff;
}

h1 {
  letter-spacing: 2px;
}

a {
  color: #5ce6cd;
}

.text-center {
  text-align: center;
}

main {
  padding: 5em 1.5em;
  padding: 2em;
  line-height: 1.4;
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

,
h3 {
  font-size: 20px;
  margin-top: 1em;
}

hr {
  opacity: .4;
}

dt {
  font-weight: bold;
}

dd {
  margin-bottom: 1em;
}

.btn {
  display: inline-block;
  padding: .6em 1em;
  color: #fff;
  background-color: #5ce6cd;
  border: 0;
  text-decoration: none;
  font-weight: bold;
  text-transform: uppercase;
  cursor: pointer;
  font-size: 1.2em;
  text-shadow: 0 0 1px rgba(0, 0, .5);
  letter-spacing: 1.2;
}

.inscripcion {
  margin: 4em;
  padding-bottom: 1.5em;
  border: 1px solid #999;
}

.img-responsive {
  width: 100%;
  max-width: 100%;
}

#qvo-button-container {
  text-align: center;
}

#qvo-button-container>div {
  display: inline;
}

.flag {
  max-width: 100px;
}

.container {
  padding: 2em;
}