/* Reset default browser styles */
* {
  font-family: "Montserrat", serif;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: #F8F8F8;
  height: 100vh;
  width: 100vw;
  margin: 0;
  overflow-x: hidden;
}

.page {
  color: #40403F;
  width: 100vw;
  height: calc(100vh - 4.5rem);
  padding-left: 1rem;
  padding-right: 1rem;
  margin: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

nav ~ .content-page {
  margin-top: 4.5rem;
}

.content-page {
  font-size: 1.75rem;
}

#intro {
  text-align: center;
}

@media (max-width: 720px) {
  #intro {
    margin-top: 4.5rem;
  }
}

#intro > #intro-title {
  font-size: 1.75rem;
  margin-bottom: 2rem;
}

#intro > #intro-description {
  font-size: 1rem;
}

nav {
  position: absolute;
  top: calc(100vh - 4.5rem);
  width: 100vw;
  min-height: 4.5rem;
  background: white;
  box-shadow: 0 -2px 1rem #CFD2CD;
  display: flex;
  justify-content: space-around;
  align-items: center;
}

@media (max-width: 720px) {
  nav {
    flex-direction: column;
    justify-content: space-evenly;
    align-items: flex-start;
    top: 0;
    height: 100vh;
    width: initial;
  }
}

nav a {
  position: relative;
  background: transparent;
  text-align: center;
  height: 4.5rem;
  text-decoration: none;
  color: #40403F;
}

@media (max-width: 720px) {
  nav a {
    width: 100%;
    margin: auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: center;
    flex-direction: column;
    align-items: flex-start;
  }
}

nav a.menu-btn {
  position: fixed;
  top: 0;
  z-index: 1000;
}

@media (min-width: 720px) {
  nav a.menu-btn {
    display: none;
  }
}

nav a#user-btn {
  color: #81B29A;
}

nav a.tab:not(.placeholder),
nav a.tab:not(.placeholder)::after {
  border: none;
  outline: none;
  cursor: pointer;
  flex: 1;
  line-height: 4.5rem;
  font-size: 1rem;
  vertical-align: center;
}

nav a.tab:not(.placeholder)::before,
nav a.tab:not(.placeholder)::after {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0;
}

nav a.tab:not(.placeholder)::before {
  content: "";
  border-bottom: solid 2px #81B29A;
  transition: 0.5s ease;
  z-index: 1000;
}

@media (max-width: 720px) {
  nav a.tab:not(.placeholder)::before {
    display: none;
  }
}

nav a.tab:not(.placeholder)::after {
  content: attr(data-text);
  color: white;
  background: #81B29A;
}

@media (max-width: 720px) {
  nav a.tab:not(.placeholder)::after {
    display: flex;
    justify-content: center;
    flex-direction: column;
    align-items: flex-start;
    padding: 0 1.5rem;
  }
}

nav a.tab:not(.placeholder):hover::after {
  opacity: 1;
  transition: 0.5s ease;
}

nav a.tab:not(.placeholder).active::before {
  opacity: 1;
  transition: 0.5s ease;
}

nav a.tab.hidden {
  display: none;
}

nav.hidden {
  transform: translateX(-100%);
}