:root {
  --text-color: #cccccc;
  --bg-color: #222222;
  --btn-text-color: #222222;
  --link-color: #3399ff;
  --link-hover-color: #007acc;
}

body {
  background: var(--bg-color);
  color: var(--text-color);
  font-family: Inter, sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  margin: 0 auto;
  max-width: 680px;
  padding: 4em 1em 2em;
  -webkit-text-size-adjust: none;
  -moz-text-size-adjust: none;
  text-size-adjust: none;
}

.center {
  text-align: center;
}

p {
  margin-bottom: 1.5em;
  text-align: left;
}

h1, h2 {
  text-align: center;
}

a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.2s ease-in-out;
}

a:hover,
a:focus {
  color: var(--link-hover-color);
  outline: none;
}

/* video */
.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  max-width: 100%;
}

.video-container iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* responsive font size */
@media (max-width: 400px) {
  body {
    padding: 2em 1em;
    font-size: 14px;
  }
}

/* Logo */
.logo {
  text-align: center;
  margin-bottom: 20px;
}

.logo img {
  max-width: 114px;
  height: auto;
}