:root {
  --color-primary: #3273dc;
  --color-secondary: #23d160;
  --color-background: #f9f9f9;
  --color-text: #363636;
  --color-white: #fff;
  --color-light-gray: #ccc;
  --color-flash: #48c78e;
  --color-flash-text: #f9f9f9;
  --color-link-hover: #255aa7;
  --color-shadow: rgba(0 0 0 / 20%);
}

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

* {
  margin: 0;
  padding: 0;
}

input,
button {
  font: inherit;
}

body {
  display: grid;
  grid-template: "header header" min-content "sidebar content" auto / 275px auto;

  height: 100vh;

  font-family: Roboto, sans-serif;
  font-size: 62.5%;
  font-weight: 400;
  line-height: 1.5;
  color: var(--color-text);
}

header {
  position: relative;

  grid-area: header;

  background-color: var(--color-primary);
  border-bottom: 1px solid var(--color-light-gray);
  box-shadow: 0 6px 12px var(--color-shadow);
}

#sidebar {
  grid-area: sidebar;
  padding: 25px;
  background-color: var(--color-background);
}

#content {
  grid-area: content;
  padding: 25px;
}

header a {
  display: block;

  height: 100%;
  padding: 20px;

  color: var(--color-white);
  text-decoration: none;
}

h1 {
  font-size: 3rem;
  font-weight: 300;
}

h2 {
  margin-bottom: 1rem;
  font-size: 2.3rem;
  line-height: 1;
  color: var(--color-primary);
}

ul {
  font-size: 1.2rem;
  list-style: none;
}

ul li::before {
  content: '•';

  display: inline-block;

  width: 1rem;

  font-weight: bold;
  color: var(--color-secondary);
}

ul a {
  color: var(--color-text);
  text-decoration: none;
}

.actions a,
.actions button {
  font-size: 1.1rem;
  color: var(--color-primary);
}

button.link {
  cursor: pointer;

  padding: 0 !important;

  text-decoration: underline;

  background: none !important;
  border: none;
}

ul a:hover {
  text-decoration: underline;
}

p {
  font-size: 1.2rem;
}

label {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 1rem;
}

input[type="text"],
input[type="email"] {
  width: 400px;
  margin-bottom: 1rem;
  padding: 0.3rem;

  font-size: 1.2rem;

  background-color: var(--color-background);
  border: 1px solid var(--color-light-gray);
}

input[type="text"]:focus,
input[type="email"]:focus {
  border-color: var(--color-primary);
  outline: none;
}

button[type="submit"]:not(.link) {
  cursor: pointer;

  padding: 0.6rem 1.2rem;

  font-size: 1rem;
  color: var(--color-white);

  background-color: var(--color-primary);
  border: none;
  border-radius: 0.3em;

  transition: background-color 0.3s ease;
}

button[type="submit"]:hover {
  background-color: var(--color-link-hover);
}

ul + .actions,
p + .actions {
  margin-top: 1rem;
}

.flash {
  width: 400px;
  margin-bottom: 2rem;
  padding: 0.8rem;

  font-size: 1.1rem;
  color: var(--color-flash-text);

  background-color: var(--color-flash);
  border-radius: 3px;
  box-shadow: 0 2px 4px var(--color-shadow);
}