@charset "utf-8";

:root {
  --width: 640px;
}

html,
body {
  height: 100vh;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background-image: radial-gradient(50% 80%, #fff 9%, #cbd5de 82%);
}

/* helper */

.h-container {
  max-width: var(--width);
  padding: 1rem;
  box-sizing: border-box;
}

.h-mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* layout */

.header {
  padding: 3rem 2rem;
  text-align: center;
  background-color: #e8eef4;
  border-bottom: solid 1px #fff;
  box-shadow: 0 0 10px rgba(0, 0, 0, .1) inset;
}

.header__title {
  font-size: 5rem;
  font-weight: 700;
  color: rgba(0, 0, 0, .4);
  text-shadow: 1px 1px #fff;
}

.section+.section {
  margin-top: 1.5rem;
}

.section__title,
.section__description {
  color: rgba(0, 0, 0, .35);
  text-shadow: 1px 1px #fff;
  line-height: 1.7;
}

.section__title {
  font-weight: 600;
  font-size: 1.5rem;
}


.tab {
  position: relative;
}

.tab-ul {
  display: flex;
  margin-bottom: -1px;
}

.tab-li {
  border: solid 1px #ddd;
  padding: 0 3rem;
  line-height: 2.5;
  margin-right: -1px;
  cursor: pointer;
  background: #eee;
  color: #999;
}

.tab-li-active {
  background-color: #FFF;
  border-bottom-color: #fff;
}

.tab-content {
  border: solid 1px #ddd;
  background: #fff;
  display: none;
}

.tab-title, .tab-description {
  margin: 1rem;
}

.tab-title {
  font-size: 1.5rem;
  font-weight: 600;
}

.tab-description {
  line-height: 1.6;
}

.tab-link {
  color: #059;
  text-decoration: none;
}

.tab-link:hover {
  text-decoration: underline;
}