@property --Color_Text {
  syntax: '<color>';
  inherits: true;
  initial-value: black;
}
@property --Color_Background {
  syntax: '<color>';
  inherits: true;
  initial-value: rgba(0, 0, 255, 0.5);
}
@property --Color_Complementary {
  syntax: '<color>';
  inherits: true;
  initial-value: cyan;
}
:root
{
    --Color_Complementary_1: 127, 215, 245;
    --Color_Complementary_2: 192, 235, 250;
}
button {
    text-align: center;
    display: inline-block;
    padding: 15px 40px;
    border: 1px solid #fff;
    cursor: pointer;
    letter-spacing: 2px;
    position: relative;
    overflow: hidden;
    margin: 0 20px;
    background-color: var(--Color_Complementary);
}
button:before {
    content: "";
    position: absolute;
    height: 150px;
    width: 50px;
    background: #fff;
    left: -55px;
    top: -40px;
    transform: rotate(37deg);
    transition: all .3s;
    opacity: 0.7;
}
button:hover:before {
  left: 95%;
}
.Header
{
    height: auto;
    text-align: center;
    font-size: 20px;
    border: 1px solid white;
    border-radius: 50px 50px 50px 50px;
    box-shadow: 2px 3px 20px black, 0 0 60px var(--Color_Complementary) inset;
    color: var(--Color_Text);
    background-color: var(--Color_Background);
}
.Navigation,
.Navigation_2
{
    position: relative;
    z-index: 10;
    height: auto;
    text-align: center;
    border-top: 1px solid white;
    border-bottom: 1px solid white;
    font-size: 26px;
    color: var(--Color_Text);
    border: 1px solid white;
    border-radius: 50px 50px 50px 50px;
    box-shadow: 2px 3px 20px black, 0 0 60px var(--Color_Complementary) inset;
    background-color: rgba(100, 150, 255, 0.5);
}
.Navigation ul,
.Navigation_2 ul
{
    display: flex;
}
.Navigation li,
.Navigation_2 li
{
    list-style: none;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    cursor: pointer;
    text-decoration: none;
}
.Navigation li
{
    width: 100%;
}
.Navigation_2 li
{
    width: 50%;
}
.Navigation a,
.Navigation_2 a
{
    display: block;
    padding: 10px 25px;
    text-decoration: none;
    border-right: 1px solid var(--Color_Text);
    color: var(--Color_Text);
}
.Navigation li:last-child a,
.Navigation_2 li:last-child a
{
    border-right: none; 
}
.Navigation a,
.Navigation_2 a {
    position: relative;
    cursor: pointer;
    text-decoration: none;
}
.Navigation a:after,
.Navigation_2 a:after
{
	content: "";
    display: block;
    position: absolute;
    right: 0;
    bottom: -3px;
    width: 0;
    height: 2px;
    background-color: black;
    transition: width 0.5s;
}
.Navigation a:hover:after,
.Navigation_2 a:hover:after
{
	content: "";
    width: 100%;
    display: block;
    position: absolute;
    left: 0;
    bottom: -3px;
    height: 2px;
    background-color: cyan;
    transition: width 0.5s;
}
.Navigation_Sidebar li
{
    font-size: 16px;
}
.Navigation_Sidebar ul
{
    display: inline;
}
.dropdown
{
    position: relative;
}
.dropdown-content
{
    position: absolute;
    background-color: var(--Color_Background);
    box-shadow: 2px 3px 20px black, 0 0 60px var(--Color_Complementary) inset;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s;
    pointer-events: none;
    border-radius: 0.5rem;
    z-index: 1;
}
.dropdown:hover .dropdown-content
{
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.dropdown-content a
{
    color: var(--Color_Text);
    padding: 0.5rem 1rem;
    text-decoration: none;
    display: block;
}
.Main_Text
{
    margin-left: auto;
    margin-right: auto;
    width: 55%;
    height: 65vh;
    padding: 0px 30px 15px 30px;
    border: 1px solid white;
    border-radius: 30px 15px 40px 5px;
    text-align: justify;
    line-height: 150%;
    font-size: 18px;
    overflow: scroll;
    box-shadow: 2px 3px 20px black, 0 0 60px var(--Color_Complementary) inset;
    color: var(--Color_Text);
    background-color: var(--Color_Background);
}
.Main_Text_Header
{
    text-align: center;
}
p
{
    --padding-top-bottom: 1.25em;
    margin-top: var(--padding-top-bottom);
    margin-bottom: var(--padding-top-bottom);
}
.Sidebar
{
    margin-left: 0;
    max-height: 65vh;
    float: left;
    padding: 0px 15px 30px 15px;
    border: 1px solid white;
    border-radius: 15px 30px 5px 40px;
    text-align: justify;
    line-height: 150%;
    overflow-wrap: break-word;
    max-width: 15%;
    box-shadow: 2px 3px 20px black, 0 0 60px var(--Color_Complementary) inset;
    color: var(--Color_Text);
    background-color: var(--Color_Background);
    font-weight: bold;
}
.Sidebar a
{
    color: var(--Color_Text);
    text-decoration: none;
}
.Sidebar ul
{
    max-height: 65vh;
    overflow: auto;
}
.Sidebar a,
.Sidebar a {
    position: relative;
    cursor: pointer;
    text-decoration: none;
}
.Sidebar a:after,
.Sidebar a:after
{
	content: "";
    display: block;
    position: absolute;
    right: 0;
    bottom: -3px;
    width: 0;
    height: 2px;
    background-color: black;
    transition: width 0.5s;
}
.Sidebar a:hover:after,
.Sidebar a:hover:after
{
	content: "";
    width: 100%;
    display: block;
    position: absolute;
    left: 0;
    bottom: -3px;
    height: 2px;
    background-color: cyan;
    transition: width 0.5s;
}
.Highlighted_Text
{
    font-weight: bold;
}
.Button_Left
{
    float: left;
    margin-left: 10px;
}
.Button_Center
{
   float: center;
}
.Button_Right
{
    float: right;
}
* {
  box-sizing: content-box;
}

html, body {
  margin: 0;
  height: 100%;
  width: 100%;
  overflow: hidden;
  position: relative;
}

.title {
  position: absolute;
  width: 100%;
  text-align: center;
  top: 50%;
  color: #fff;
  font-weight: 100;
  font-size: 3em;
  font-family: 'Pacifico', cursive;
}

.title .avatar {
  width: 40px;
  height: 40px;
  background-image: url(../img/avatar.jpg);
  display: inline-block;
  border-radius: 50%;
  background-size: 100%;
}

.noite {
  background: -webkit-linear-gradient(top, rgb(0, 0, 0) 50%, rgb(25, 19, 39)80%, rgb(43, 32, 72));
  width: 100%;
  height: 100%;
  position: absolute;
  overflow: hidden;
}

.constelacao {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  animation: rotate 600s infinite linear;
}

.estrela {
  background-color: white;
  border-radius: 50%;
  position: absolute;
  animation-name: estrela;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}

.estrela.style1 { animation-duration: 0.5s; animation-name: estrela; }
.estrela.style2 { animation-duration: 1s; animation-name: estrela; }
.estrela.style3 { animation-duration: 1.5s; animation-name: estrela; }
.estrela.style4 { animation-duration: 2s; animation-name: estrelaDestacada; }

.estrela.tam1 { width: 1px; height: 1px; }
.estrela.tam2 { width: 2px; height: 2px; }
.estrela.tam3 { width: 3px; height: 3px; }

.estrela.opacity1 { opacity:  1; }
.estrela.opacity2 { opacity: .5; }
.estrela.opacity3 { opacity: .1; }

.meteoro {
  position: absolute;
  background-color: #fff;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  transform: rotate(-35deg);
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  animation-duration: 1s;
}

.meteoro:before {
  content: "";
  display: inline-block;
  vertical-align: middle;
  margin-right: 10px;
  width: 0;
  height: 0;
  border-top: 1px solid transparent;
  border-bottom: 1px solid transparent;
  border-left: 85px solid white;
  position: absolute;
  left: 2px;
  top: 0;
}

.meteoro.style1 { animation-name: meteoroStyle1; }
.meteoro.style2 { animation-name: meteoroStyle2; }
.meteoro.style3 { animation-name: meteoroStyle3; }
.meteoro.style4 { animation-name: meteoroStyle4; }

.lua {
  position: absolute;
  right: 200px;
  top: 150px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  box-shadow: 0 0 160px 0px #fff, 0 0 30px -4px #fff, 0 0 8px 2px rgba(255, 255, 255, 0.26);
  background-color: #fff;
  animation-name: lua;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  animation-duration: 10s;
}

.lua .textura {
  background-image: url(https://raw.githubusercontent.com/interaminense/starry-sky/master/src/img/bgMoon.png);
  background-position: center;
  background-size: 100%;
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;
  border-radius: 50%;
  overflow: hidden;
  opacity: 0.4;
}

.floresta {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
}

.floresta img {
  width: 100%;
  position: absolute;
  bottom: 0;
  left: 0;
}

@keyframes escurecer {
  0%   { top: 0; }
  100% { top: 100%; }
}

@keyframes estrela {
  0% {
    box-shadow: 0 0 10px 0px rgba(255, 255, 255, 0.05);
  }
  50% {
    box-shadow: 0 0 10px 2px rgba(255, 255, 255, 0.4);
  }
  100% {
    box-shadow: 0 0 10px 0px rgba(255, 255, 255, 0.05);
  }
}

@keyframes estrelaDestacada {
  0% {
    background-color: #FFFFFF;
    box-shadow: 0 0 10px 0px rgba(255, 255, 255, 1);
  }
  20% {
    background-color: #FFC4C4;
    box-shadow: 0 0 10px 0px rgb(255, 196, 196, 1);
  }
  80% {
    background-color: #C4CFFF;
    box-shadow: 0 0 10px 0px rgb(196, 207, 255, 1);
  }
  100% {
    background-color: #FFFFFF;
    box-shadow: 0 0 10px 0px rgba(255, 255, 255, 0.2);
  }
}

@keyframes meteoroStyle1 {
  0% { opacity: 0; right: 300px; top: 100px; }
  30% { opacity: .3; }
  60% { opacity: .3; }
  100% { opacity: 0; right: 1000px; top: 600px; }
}

@keyframes meteoroStyle2 {
  0% { opacity: 0; right: 700px; top: 100px; }
  30% { opacity: 1; }
  60% { opacity: 1; }
  100% { opacity: 0; right: 1400px; top: 600px; }
}

@keyframes meteoroStyle3 {
  0% { opacity: 0; right: 300px; top: 300px; }
  30% { opacity: 1; }
  60% { opacity: 1; }
  100% { opacity: 0; right: 1000px; top: 800px; }
}

@keyframes meteoroStyle4 {
  0% { opacity: 0; right: 700px; top: 300px; }
  30% { opacity: 1; }
  60% { opacity: 1; }
  100% { opacity: 0; right: 1400px; top: 800px; }
}

@keyframes lua {
  0%{
    box-shadow: 0 0 160px 0px #fff, 0 0 30px -4px #fff, 0 0 8px 2px rgba(255, 255, 255, 0.26);
  }
  50% {
    box-shadow: 0 0 80px 0px #fff, 0 0 30px -4px #fff, 0 0 8px 2px rgba(255, 255, 255, 0.26);
  }
  100% {
    box-shadow: 0 0 160px 0px #fff, 0 0 30px -4px #fff, 0 0 8px 2px rgba(255, 255, 255, 0.26);
  }
}

@keyframes rotate {
  0% {
    -webkit-transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
  }
}