/* ==========  General  ========== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --body-color: #141520;
  --gap: 7px;
}

button {
  cursor: pointer;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background-color: var(--body-color);
  color: #f9f9f9;
}

a {
  color: #f9f9f9;
  text-decoration: none;
}

li {
  list-style: none;
}

/* ==========  Category  ========== */

main .category-container {
  position: fixed;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  width: 100vw;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 99;
  display: none;
}

main .category-container .category-card {
  position: absolute;
  top: 50%;
  left: 50%;
  translate: -50% -50%;
  background-color: var(--body-color);
  width: 30rem;
  height: 22rem;
  z-index: 100;
  border-radius: 1rem;
  padding: 15px 20px;
  overflow: hidden;
}

.category-container .close-category {
  position: absolute;
  top: 10px;
  right: 10px;
  background-color: transparent;
  color: #f9f9f9;
  border: none;
  border-radius: 2px;
  padding: 2px;
  font-size: 1.5rem;
  color: #f17d68;
}

.category-container h2 {
  font-weight: 500;
  margin-bottom: 1rem;
  font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

.category-container .category-card .categories {
  margin-left: 1.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.category-container .category-card .categories .category {
  position: relative;
  font-size: 1rem;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  cursor: pointer;
  transition: all 0.375s;
  padding: 2px 0;
  text-indent: 10px;
  height: 2rem;
  width: 10rem;
  white-space: nowrap;
  display: flex;
  align-items: center;
}

.category-container .category-card .categories .category:before {
  content: '';
  position: absolute;
  right: 102%;
  top: 50%;
  translate: 0 -50%;
  aspect-ratio: 1;
  height: 1rem;
  border-radius: 50%;
}

.category-container .category-card .categories .noble-gas:hover {
  color: #ff0000;
}
.category-container .category-card .categories .halogen:hover {
  color: #54aaff;
}
.category-container .category-card .categories .alkali:hover {
  color: #9c38ff;
}
.category-container .category-card .categories .lanthanoid:hover {
  color: #ffff00;
}
.category-container .category-card .categories .actinoid:hover {
  color: #ffae00;
}
.category-container .category-card .categories .alkaline-earth:hover {
  color: #6200ff;
}
.category-container .category-card .categories .transition-metal:hover {
  color: #00ff00;
}
.category-container .category-card .categories .super-actinoid:hover {
  color: #ffffff;
}
.category-container .category-card .categories .nonmetal:hover {
  color: #ff00ff;
}
.category-container .category-card .categories .metal:hover {
  color: #00ffff;
}

.category-container .category-card .categories .all::before {
  background: linear-gradient(45deg, #00ff66, #3399ff);
}
.category-container .category-card .categories .noble-gas::before {
  background-color: #ff1a4b;
}
.category-container .category-card .categories .halogen::before {
  background-color: #33cfff;
}
.category-container .category-card .categories .alkali::before {
  background-color: #b84dff;
}
.category-container .category-card .categories .lanthanoid::before {
  background-color: #ffe94d;
}
.category-container .category-card .categories .actinoid::before {
  background-color: #ff9900;
}
.category-container .category-card .categories .alkaline-earth::before {
  background-color: #7f00ff;
}
.category-container .category-card .categories .transition-metal::before {
  background-color: #00ff66;
}
.category-container .category-card .categories .super-actinoid::before {
  background-color: #e0e0e0;
}
.category-container .category-card .categories .nonmetal::before {
  background-color: #ff33cc;
}
.category-container .category-card .categories .metal::before {
  background-color: #00e6e6;
}

/* ==========  Actual Code  ========== */

main {
  display: flex;
  padding: 2rem 0;
}

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--gap);
}

.container .row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--gap);
}

.container .row .element {
  position: relative;
  aspect-ratio: 1/1;
  height: 4rem;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: all 0.375s;
  background-color: transparent;
}

.container .row .element:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.container .row .element::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 1rem;
}

.container .row .noble-gas::after {
  background-color: #ff1a4b;
}
.container .row .halogen::after {
  background-color: #33cfff;
}
.container .row .alkali::after {
  background-color: #b84dff;
}
.container .row .lanthanoid::after {
  background-color: #ffe94d;
}
.container .row .actinoid::after {
  background-color: #ff9900;
}
.container .row .alkaline-earth::after {
  background-color: #7f00ff;
}
.container .row .super-actinoid::after {
  background-color: #e0e0e0;
}
.container .row .nonmetal::after {
  background-color: #ff33cc;
}
.container .row .metal::after {
  background-color: #00e6e6;
}
.container .row .transition-metal::after {
  background-color: #00ff66;
}
.container .row .element-range::after {
  background-color: #00ff66;
}

.container .row .null {
  background: transparent !important;
  background-color: transparent !important;
  cursor: auto !important;
  &:hover {
    background-color: transparent !important;
    background: transparent !important;
  }
  &::after {
    background-color: transparent !important;
    background: transparent !important;
  }
}

.container .row .element .number {
  position: absolute;
  top: 3px;
  left: 3px;
  font-size: 10px;
  color: #cccccc;
}

.container .row .element .symbol {
  position: absolute;
  top: 50%;
  left: 50%;
  translate: -50% -50%;
  font-size: 1.5rem;
}

.container .row .element .name {
  position: absolute;
  bottom: 2px;
  left: 50%;
  translate: -50% 0;
  font-size: 10px;
  color: #dddddd;
}

.container .row .element .num-range {
  font-size: 11px;
  white-space: nowrap;
}

@media screen and (max-width: 45rem) {
  .container .row .element {
    height: 3.25rem;
  }
  .container .row .element .symbol {
    font-size: 1.2rem;
  }
  .container .row .element .name,
  .container .row .element .number,
  .container .row .element .num-range {
    font-size: 8px;
  }
}

@media screen and (max-width: 33rem) {
  main .category-container .category-card {
    width: 25rem;
  }
}
@media screen and (max-width: 27rem) {
  main .category-container .category-card {
    width: 22rem;
  }
  .category-container .category-card .categories .category {
    text-indent: 0;
  }
  .category-container .category-card .categories .category::before {
    display: none;
  }
}

/* Dark mode */

.darkmode {
  --body-color: #eeeeee;
  color: #000;
}

.darkmode .container .element .number,
.darkmode .container .element .name {
  color: #333;
}

.darkmode header nav li {
  color: #000;
}

.darkmode header #mode {
  color: #000;
}

.darkmode .container .row .super-actinoid::after {
  background-color: black;
}

.darkmode .container .row .element:hover {
  background-color: rgba(0, 0, 0, 0.2);
}

.darkmode .category-container .category-card .categories .super-actinoid {
  border-color: #111;
  &:hover {
    color: #111;
  }
}
.darkmode
  .category-container
  .category-card
  .categories
  .super-actinoid::before {
  background-color: black;
}