:root {
  --rad: 4rem;
  --blue: #74b9ff;
  --green: #00b894;
  --accent: #f16065;
  --accent-dark: #e16065;
  --white: #dfe6e9;
  --gray: #cfd6d9;
  --black: #636e72;
  --transparent: rgba(178, 190, 195, 0.6);
  --shadow: 0 2rem 6rem rgba(99, 110, 114, 0.2);
  --icon-size: 2.4rem;
}

*,
*::after,
*::before {
  margin: 0;
  padding: 0;
  box-sizing: inherit;
}

html {
  font-family: "PT Sans", sans-serif;
  font-size: 62.5%;
  background: #202A44;
  /* background-image: linear-gradient(to top right, var(--blue), var(--green)); */
  color: var(--black);
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height:max-content;
  align-self: flex-start;
}

.calculator {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: 2fr repeat(5, 1fr);
  grid-gap: 1.5rem;
  width: 90vw;
  min-width: 30rem;
  max-width: 50rem;
  max-height: 130vw;
  padding: 2rem 1.5rem;
  background-color: var(--transparent);
  box-shadow: var(--shadow);
  border-radius: var(--rad);
}

.display {
  grid-area: 1/1/2/5;
  background-color: var(--white);
  border-radius: var(--rad);
  letter-spacing: 0.5rem;
  padding: 1.5rem 2rem;
  text-align: right;
  font-size: 3.6rem;
  color: var(--black);
  margin-bottom: 2rem;
  overflow: hidden;
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

.btn {
  background-color: var(--white);
  border-radius: var(--rad);
  text-align: center;
  font-weight: 700;
  font-size: 2rem;
  display: block;
  box-shadow: 0 2px 6px rgba(99, 110, 114, 0.2);
  cursor: pointer;
  transition: all 0.1s ease-out;
  -moz-user-select: -moz-none;
  -ms-user-select: none;
  -webkit-user-select: none;
  user-select: none;
  display: flex;
  justify-content: center;
  align-items: center;
}

#clear {
  grid-area: 2/1;
  letter-spacing: 2px;
}

#del {
  grid-area: 2/2;
}

#divide {
  grid-area: 2/3;
}

#multiply {
  grid-area: 2/4;
}

#subtract {
  grid-area: 3/4;
}

#add {
  grid-area: 4/4;
}

#decimal {
  grid-area: 6/3;
}

#equals {
  grid-area: 5/4/7/5;
  height: auto;
  line-height: 20vh;
}

#zero {
  grid-area: 6/1/7/3;
}

#one {
  grid-area: 5/1;
}

#two {
  grid-area: 5/2;
}

#three {
  grid-area: 5/3;
}

#four {
  grid-area: 4/1;
}

#five {
  grid-area: 4/2;
}

#six {
  grid-area: 4/3;
}

#seven {
  grid-area: 3/1;
}

#eight {
  grid-area: 3/2;
}

#nine {
  grid-area: 3/3;
}

#clear,
#equals {
  color: var(--white);
  background-color: var(--accent);
}

#clear:hover,
#equals:hover {
  background-color: var(--accent-dark);
}

#clear:active,
#equals:active {
  color: var(--accent);
  background-color: var(--gray);
}

.btn:hover {
  background-color: var(--gray);
  box-shadow: 0 1px 3px rgba(99, 110, 114, 0.6);
}

.btn:active {
  color: var(--white);
  background-color: var(--accent-dark);
}

/* Modal ====================================================== */
.modal__toggle-input {
  display: none;
}
.modal__toggle-label {
  position: fixed;
  bottom: 0;
  right: 0;
  height: 5rem;
  width: 5rem;
  background-color: var(--transparent);
  border-radius: 2rem 0 0 0;
  transition: all 0.15s ease-out;
  z-index: 10;
  cursor: pointer;
}
.modal__toggle-label svg {
  fill: var(--white);
  height: var(--icon-size);
  width: var(--icon-size);
}
.modal__toggle-label:hover, .modal__toggle-label:focus {
  background-color: var(--accent);
  box-shadow: var(--shadow);
}
.modal__toggle-label .close, .modal__toggle-label .open {
  display: block;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.3s ease-out;
}
.modal__toggle-label .close {
  opacity: 0;
}
.modal__toggle-input:checked ~ .modal__container {
  opacity: 1;
  z-index: 1;
  transform: scale(1, 1);
}
.modal__toggle-input:checked ~ .modal__container .modal__content-wrapper > div {
  opacity: 1;
  transform: translateY(0);
}
.modal__toggle-input:checked ~ .modal__toggle-label {
  background-color: var(--accent);
  border-radius: 10rem;
  bottom: 2rem;
  right: 1rem;
}
.modal__toggle-input:checked ~ .modal__toggle-label:hover {
  background-color: var(--accent-dark);
}
.modal__toggle-input:checked ~ .modal__toggle-label:hover .close {
  transform: translate(-50%, -50%) rotate(90deg);
}
.modal__toggle-input:checked ~ .modal__toggle-label .close {
  opacity: 1;
}
.modal__toggle-input:checked ~ .modal__toggle-label .open {
  opacity: 0;
}
.modal__container {
  opacity: 0;
  position: fixed;
  width: 100%;
  height: 100vh;
  top: 0;
  left: 0;
  transform: scale(0.5, 0.01);
  background-color: rgba(4, 4, 4, 0.8);
  transition: all 0.3s ease-out;
  z-index: -1;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}
.modal__content-wrapper {
  background-color: var(--white);
  padding: 4rem;
  width: 70vw;
  max-height: 80vh;
  border-radius: 3px;
  overflow: auto;
  display: flex;
}
.modal__content-wrapper > div {
  padding: 2rem 4rem;
  opacity: 0;
  transform: translateY(2rem);
}
.modal .description {
  flex-basis: 60%;
  transition: all 0.5s ease-out 0.4s;
}
.modal__title {
  font-size: 2.4rem;
  margin-bottom: 2rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  text-align: left;
}
.modal__title::after {
  content: "";
  background-color: var(--black);
  display: block;
  height: 0.5rem;
  width: 20%;
  margin-top: 1rem;
  border-radius: 3px;
}
.modal__text {
  text-align: justify;
  color: var(--black);
  font-size: 1.8rem;
  line-height: 1.5;
}
.modal__text:not(:last-child) {
  margin-bottom: 1rem;
}
.modal__text a:link, .modal__text a:visited {
  color: var(--accent);
}
.modal__text a:link:hover, .modal__text a:visited:hover {
  text-decoration: underline;
}
.modal .about {
  flex-basis: 40%;
  background-color: var(--accent-dark);
  border-radius: 3px;
  transition: all 0.5s ease-out 0.5s;
}
.modal .about .modal__title, .modal .about .modal__text {
  color: var(--white);
}
.modal .about__social-icons {
  display: flex;
  list-style: none;
  justify-content: center;
  margin-top: 3rem;
  fill: var(--black);
}
.modal .about__social-icons svg {
  display: block;
  box-sizing: initial;
  width: var(--icon-size);
  height: var(--icon-size);
  padding: calc(var(--icon-size) / 4);
  transform: scale(0.8);
  transition: transform 0.2s ease-out;
}
.modal .about__social-icons svg:hover {
  transform: scale(1.2);
}

/* Media Quiries ================================================================== */
@media screen and (max-width: 850px) {
  html {
    font-size: 55%;
  }

  .modal__content-wrapper {
    width: 80vw;
  }
}
@media screen and (max-width: 500px) {
  html {
    font-size: 50%;
  }

  .modal__content-wrapper {
    width: 90vw;
    flex-direction: column;
    padding: 2rem;
  }
  .modal__content-wrapper > div {
    padding: 2rem;
  }
  .modal__content-wrapper .about__social-icons svg {
    transform: scale(1);
  }
}

.article {
  font-size: 2rem;
  padding:5% 20% 0;
  color:white;
}

a {
  color:yellow;
}

/* adjust menu bar */
.hbar-content {
  margin-top:auto !important;
}