:root {
  --nav-icon-width: 50px;
  --nav-border-width: 10px;

  --color-primary: #be3144;
  --color-primary-dark: #303841;
  --color-secondary: #3a4750;
  --color-secondary-bright: #6c8190;
  --color-background: #eeeeee;
  --color-active: #ffffff;
  --color-error: #cc3333;
  --color-success: #4bb544;
  --border-radius: 4px;
}

body {
  height: 100vh;
  width: 100vw;
  margin: 0;
  font-family: sans-serif;
  font-size: 18px;
  background: var(--color-background);
  background-size: cover;
}

h1 {
  margin-bottom: 0.2em;
}

.page-container {
  height: inherit;
  padding: 0;
  display: flex;
}

.main {
  height: inherit;
  margin: 0;
  padding-left: 20px;
  padding-right: 10px;
  width: 100vw;
  overflow-y: auto;
  flex: var(--nav-border-width) 0 100%;
}

.main-user {
  height: 100vh;
  margin: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav {
  width: 200px;
  height: inherit;
  position: relative;
  background-color: var(--color-secondary);
  transition: width 0.2s;
  flex-shrink: 0;
}

.nav--collapsed {
  width: var(--nav-icon-width);
}

.nav--collapsed .nav__label {
  display: none;
}

.nav__border {
  position: absolute;
  left: 100%;
  top: 0;
  width: var(--nav-border-width);
  height: inherit;
  background-color: var(--color-secondary-bright);
  transition: background-color 0.2s;
  cursor: ew-resize;
}

.nav__border:hover {
  background-color: var(--color-primary-dark);
}

.nav__bottom {
  position: absolute;
  bottom: 0;
}

.nav__link {
  display: flex;
  align-items: center;
  color: var(--color-active);
  text-decoration: none;
}

.nav__link:hover {
  background-color: var(--color-secondary-bright);
}

.nav__icon-container {
  width: var(--nav-icon-width);
  height: var(--nav-icon-width);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.content__nav {
  margin-bottom: 0.5em;
}

.nav__label {
  white-space: nowrap;
}

.cards {
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

.card {
  box-shadow: 0 0 3px rgba(0, 0, 0, 0.1);
}

.card__image {
  width: 100%;
  display: block;
}

.card__content {
  line-height: 1.5;
  font-size: 0.9em;
  padding: 15px;
  background-color: #dddddd;
}

.card__content > h4 {
  margin-top: 0;
  margin-bottom: 5px;
}

.card__content p {
  margin-top: 0;
  margin-bottom: 0;
}

.card__info {
  padding: 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #555;
  background-color: #cccccc;
  font-size: 0.8em;
  border-bottom: 2px solid #aaaaaa;
}

.card__info i {
  font-size: 0.9em;
  margin-right: 7px;
}

.card__link {
  color: var(--color-secondary);
  text-decoration: none;
}

.card_link:hover {
  text-decoration: underline;
}

.topics {
}

.topic {
  box-shadow: 0 0 3px rgba(0, 0, 0, 0.1);
  margin-bottom: 5px;
}

.topic__header {
  background-color: var(--color-secondary);
  color: var(--color-active);
  padding: 15px;
}

.topic__content {
  display: none;
  padding: 15px;
}

.topic__content--expand {
  display: block;
}

.container {
  width: 400px;
  max-width: 400px;
  margin: 1rem;
  padding: 2rem;
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.2);
  border-radius: var(--border-radius);
  background: var(--color-background);
}

.container,
.form__input,
.form_button,
.form__text {
  font: 500 1rem "Roboto", sans-serif;
}

.form--hidden {
  display: none;
}

.form > *:first-child {
  margin-top: 0;
}
.form > *:last-child {
  margin-bottom: 0;
}

.form__title {
  margin-bottom: 2rem;
  text-align: center;
}

.form__message {
  text-align: center;
  margin-bottom: 1rem;
}

.form__message--success {
  color: var(--color-success);
}

.form__message--error {
  color: var(--color-error);
}

.form__input-group {
  margin-bottom: 1rem;
}

.form__input,
.form__text {
  display: block;
  width: 100%;
  padding: 0.75rem;
  box-sizing: border-box;
  border-radius: var(--border-radius);
  border: 1px solid var(--color-secondary);
  outline: none;
  background: var(--color-background);
  transition: background 0.2s, border-color 0.2s;
}



.form__input:focus,
.form__text:focus {
  border-color: var(--color-primary);
  background: var(--color-active);
}

.form__text {
  height:100px;
  text-align: left;
}

.form__input--error {
  color: var(--color-error);
  border-color: var(--color-error);
}

.form__input-error-message {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-error);
}

.form__button {
  width: 100%;
  padding: 1rem 2rem;
  font-weight: bold;
  font-size: 1.1rem;
  color: var(--color-background);
  border: none;
  border-radius: var(--border-radius);
  outline: none;
  background-color: var(--color-primary);
}

.form__button:hover {
  background: var(--color-primary-dark);
}

.form__button:active {
  transform: scale(0.98);
}

.form__text {
  text-align: center;
}

.form__link {
  color: var(--color-secondary);
  text-decoration: none;
  cursor: pointer;
}

.form__link:hover {
  text-decoration: underline;
}