@import url("https://fonts.googleapis.com/css?family=Roboto:400,400i,700");

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: #f7f7f7;
  font-family: Roboto, sans-serif;
}

nav,
main {
  width: 80%;
}

nav {
  display: flex;
  justify-content: flex-end;
  padding: 1rem;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

nav ul li {
  display: inline-block;
}

.buttons {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.btn {
  color: hsl(0 0% 96%);
  font-size: 20px;
  margin: 14px;
  font-family: inherit;
  padding: 14px 28px;
  border: 0;
  border-radius: 6px;
  font-weight: bold;
  cursor: pointer;
  transition: 0.15s ease-in-out;
  box-shadow: 0 4px 6px -1px hsl(0 0% 0% / 0.07),
    0 2px 4px -1px hsl(0 0% 0% / 0.07);
}

.btn:active {
  transform: scale(0.96);
}

.btn--success {
  color: #155724;
  background-color: #d4edda;
  border-color: #c3e6cb;
}

.btn--danger {
  color: #721c24;
  background-color: #f8d7da;
  border-color: #f5c6cb;
}
.btn--warning {
  color: #856404;
  background-color: #fff3cd;
  border-color: #ffeeba;
}