/* ##### GENERAL CSS ##### */

/* ##### Global Reset [START] ##### */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --yellow-input-bg-color: rgb(255, 255, 153);
  --orange-input-bg-color: rgb(255, 204, 102);
  --orange-menu-color: rgb(226, 107, 10);
  --blue-title-bg-color: rgb(220, 230, 241);
  --blue-cell-bg-color: rgb(197, 217, 241);
  --blue-text-color: rgb(79, 129, 189);
  --blue-font-color: rgb(54, 96, 146);
  --blue-text-leaven-color: rgb(31, 73, 125);
  --blue-arrow-bg-color: rgb(31, 73, 125);
  --green-light-bg-color: rgb(235, 241, 222);
  --green-input-bg-color: rgb(216, 228, 188);
  --green-text-leaven-color: rgb(118, 147, 60);
  --green-medium-text-color: rgb(118, 147, 97);
  --green-arrow-color: rgb(79, 98, 40);
  --green-dark-text-color: rgb(78, 98, 83);
  --purple-text-color: rgb(112, 100, 160);
  --purple-menu-color: rgb(112, 48, 160);
  --red-dark-text-color: rgb(150, 54, 52);
  --red-menu-color: rgb(192, 0, 0);
  --grey-bg: rgb(248, 248, 248);
}

html {
  scroll-behavior: smooth;
}

body {
  text-align: center;
}
/* ##### Global Reset [END] ##### */

/* ################################### */
/* ##### Common elements [START] ##### */
h1 {
  padding: 4px;
}

button {
  cursor: pointer;
}

button > * {
  pointer-events: none;
}

span {
  display: inline-block;
}

hr {
  margin-top: 10px;
  margin-bottom: 10px;
}
/* ##### Common elements [END] ##### */

/* ###################################### */
/* ##### Main page elements [START] ##### */
header {
  background-color: var(--grey-bg);
  /* margin-bottom: 20px; */
}

main {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.page-column {
  border-right: 2px solid var(--grey-bg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-column:last-child {
  border-right: none;
}

footer {
  background-color: var(--grey-bg);
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
}

footer > a {
  color: var(--blue-font-color);
  font-size: 18px;
  font-weight: bold;
}
/* ##### Main page elements [END] ##### */

/* ################################## */
/* ##### Top Navigation [START] ##### */
ul.top-nav {
  list-style-type: none;
  display: flex;
  justify-content: space-evenly;
  align-items: center;
}

.top-nav li {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 6px 4px 20px 4px;
}

.top-nav li:first-child {
  margin-left: 8px;
}

.top-nav li:last-child {
  margin-right: 8px;
}

a.top-nav-item:link,
a.top-nav-item:visited {
  border: 1px solid black;
  border-radius: 6px;
  padding: 5px;
  min-width: 50px;
  font-size: 22px;
  font-weight: bold;
  text-align: center;
  text-decoration: none;
  display: flex;
  justify-content: center;
  align-items: center;
  flex: 1 1 auto;
  background-color: white;
}

@media (hover: hover) {
  a.top-nav-item:hover {
    outline: 2px solid black;
    border: 1px solid white;
  }
}

@media (hover: none) {
  a.top-nav-item:active {
    outline: 2px solid black;
    border: 1px solid white;
  }
}

.top-nav-text {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 27px;
  height: 27px;
}

a.menu {
  color: var(--red-menu-color);
}

a.legend {
  color: var(--orange-menu-color);
}

a.info {
  color: var(--purple-menu-color);
}
/* ##### Top Navigation [END] ##### */