:root {
  --white: #fff;
  --gray-100: #ebebeb;
  --gray-200: #4e5d6c;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #868e96;
  --gray-650: #67737f;
  --gray-700: #495057;
  --gray-750: #3e474f;
  --gray-800: #343a40;
  --gray-850: #262b2f;
  --gray-900: #212529;
  --gray-950: #141c23;
  --gray-1000: #0d1620;
  --black: #000;

  --blue: #375a7f;
  --indigo: #6610f2;
  --purple: #6f42c1;
  --pink: #e83e8c;
  --red: #e74c3c;
  --orange: #fd7e14;
  --yellow: #f39c12;
  --green: #00bc8c;
  --teal: #20c997;
  --cyan: #3498db;

  --green-dark: #00936e;
  --green-darker: #007356;
  --green-shadow: rgba(0, 196, 151, .4);
  --green-shadow-light: rgba(0, 196, 151, .6);
  --red-shadow: rgba(234, 87, 68, .4);

  --font-size: 1rem;
  --font-size-sm: .8rem;
  --font-size-lg: 1.2rem;
  --font-size-xl: 1.6rem;

  --text-muted: var(--gray-600);

  --border-radius: .2rem;
}

*,
*:before,
*:after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-size: var(--font-size);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  font-weight: 300;
  line-height: 1.5;
  color: var(--white);
  background: url("../assets/bg.jpg") top center no-repeat var(--black);
  background-size: contain;
}

/*============= Base layout & styles =============*/
.contianer {
  margin: 0 auto;
  padding: 0 1rem;
  max-width: 992px;
}

.box {
  width: 100%;
  margin: 4rem auto;
  padding: 2rem;
  border-radius: var(--border-radius);
  background: var(--gray-900);
  box-shadow: 0 5px 10px rgba(0, 0, 0, .5);
}

.header {
  margin-bottom: 3rem;
  text-align: center;
}

.intro {
  margin-bottom: 3rem;
}

h1 {
  font-weight: 500;
  font-size: 2.5rem;
  margin: 1rem 0 0;
}

h2 {
  font-weight: 500;
  font-size: 2rem;
  margin: 0 0 1rem;
}

h3 {
  font-weight: 500;
  font-size: 1.5rem;
  margin: 0 0 1rem;
}

ol, ul {
  padding-left: 1.7rem;
}

ol li,
ul li {
  margin-bottom: .7rem;
  padding-left: .2rem;
}

a {
  color: var(--green);
  text-decoration: none;
}

b, strong {
  font-weight: 500;
}

a:hover,
a:focus,
a:active {
  color: var(--green-dark);
  text-decoration: underline;
}

img {
  max-width: 100%;
}

.form {
  margin: 4rem auto 0;
  max-width: 100%;
}

.results-wrapper {
  margin: 4rem 0 0;
}

.game-information {
  margin-bottom: 4rem;
}

.form-errors {
}

.text-green {
  color: var(--green);
}

.text-red {
  color: var(--red);
}

.text-muted {
  color: var(--text-muted);
}

.text-large {
  font-size: var(--font-size-lg);
}

.monospace {
  font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 95%;
}


/*============= Input fields =============*/
.input-group {
  margin: 0 auto 2rem;
}

.input-group label {
  display: block;
  margin-bottom: .5rem;
  font-weight: 500;
}

.form-input {
  display: block;
  width: 100%;
  border-radius: var(--border-radius);
  background: var(--gray-850);
  border: 2px solid var(--gray-950);
  font-size: var(--font-size-lg);
  padding: .7rem 1rem;
  color: var(--white);
  -webkit-appearance: none;
}

.form-input:focus {
  border-color: var(--green);
  outline: none;
  box-shadow: 0 0 4px var(--green-shadow);
}

.form-input:invalid:not(:placeholder-shown),
.form-input:invalid:focus {
  border-color: var(--red);
  outline: none;
  box-shadow: 0 0 4px var(--red-shadow);
}

.form-input:not(:placeholder-shown):invalid + .error-message {
  display: block;
}

.form-input::placeholder {
  color: var(--gray-500);
  transition: color 100ms ease;
}

.form-input:disabled {
  opacity: .5;
  cursor: not-allowed;
  color: var(--gray-700);
}

.form-input:disabled::placeholder {
  color: var(--gray-700);
  transition: color 100ms ease;
}

.select-wrapper {
  position: relative;
}

.select-wrapper select {
  padding-right: 2rem;
  cursor: pointer;
}

.select-wrapper:after {
  content: '';
  position: absolute;
  top: 1.2rem;
  right: 1rem;
  width: .5rem;
  height: .5rem;
  border: 2px solid var(--white);
  border-left: 0;
  border-top: 0;
  transform: rotate(45deg);
}

.error-message {
  display: none;
  margin: .25rem 0 0;
  color: var(--red);
}


/*============= Button =============*/
button {
  background-color: var(--green);
  border-radius: var(--border-radius);
  border: 0;
  padding: .7rem 1rem;
  font-size: var(--font-size-lg);
  color: var(--white);
  cursor: pointer;
  transition: background-color 100ms ease, transform 100ms ease;
}

button:hover,
button:focus {
  background-color: var(--green-dark);
  transition: background-color 100ms ease;
}

button:active {
  background-color: var(--green-darker);
  transition: background-color 100ms ease, transform 100ms ease;
  transform: scale(.975);
}

button.small {
  padding: .5rem .75rem;
  font-size: var(--font-size-sm);
}

button.secondary {
  background-color: var(--gray-600);
  color: var(--gray-1000);
}

button.secondary:hover,
button.secondary:focus {
  background-color: var(--gray-650);
}

button.secondary:active {
  background-color: var(--gray-700);
}

.calculate {
  margin-top: 2rem;
}

/*============= Platform select =============*/
.platform-detail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0 auto 2rem;
  max-width: 100%;
}

.platform-detail .checkbox {
  position: absolute;
  left: -9999px;
}

.platform-detail label {
  position: relative;
  display: inline;
  margin-right: 1rem;
  padding-left: 3rem;
  cursor: pointer;
  align-self: center;
  font-size: var(--font-size-lg);
}

.platform-detail label::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  width: 2rem;
  height: 2rem;
  border-radius: .2rem;
  background: var(--gray-850);
  border: 2px solid var(--gray-950);
}

.platform-detail .checkbox:focus + label::before {
  box-shadow: 0 0 3px var(--green-shadow);
}

.platform-detail .checkbox:disabled + label {
  cursor: not-allowed;
  color: var(--text-muted);
}

.platform-detail .checkbox:disabled + label::before {
  opacity: .5;
}

.platform-detail .checkbox:disabled + label::after {
  opacity: 1;
  content: '\00D7';
  color: var(--red-shadow);
  border: 0;
  box-shadow: none;
  transition: opacity 100ms ease;
}

.platform-detail .checkbox:checked + label::after {
  opacity: 1;
  transition: opacity 100ms ease;
}

.platform-detail label::after {
  content: '';
  position: absolute;
  top: .5rem;
  left: .5rem;
  opacity: 0;
  width: 1rem;
  height: 1rem;
  line-height: 1rem;
  font-size: 1rem;
  text-align: center;
  border-radius: 100%;
  border: 2px solid var(--green);
  box-shadow: 0 0 3px var(--green-shadow);
  transition: opacity 100ms ease;
}

.platform-detail label small {
  display: block;
  font-size: .8rem;
  color: var(--gray-600);
}

.platform-detail .platform-sales-input {
  width: 100%;
  margin-left: auto;
  margin-top: 1rem;
}

/*============= Loader =============*/
.loader {
  display: none;
  padding: 4rem 0;
  opacity: 0;
  transition: opacity 200ms ease;
}

.loader.visible {
  display: block;
}

.loader.active {
  opacity: 1;
  transition: opacity 200ms ease;
}

.loading {
  text-align: center;
}

.loading-element {
  display: inline-block;
  width: 20px;
  height: 20px;
  border-radius: 100%;
  animation: loading 1s ease-in-out infinite;
}

.loading-element + .loading-element {
  margin-left: 1rem;
}

.loading-element:nth-child(1) {
  background-color: var(--green);
  animation-delay: 0s;
}

.loading-element:nth-child(2) {
  background-color: var(--cyan);
  animation-delay: 0.09s;
}

.loading-element:nth-child(3) {
  background-color: var(--green);
  animation-delay: .18s;
}

.loading-element:nth-child(4) {
  background-color: var(--cyan);
  animation-delay: .27s;
}

/*============= Results =============*/
.results {
  display: none;
}

.result + .result {
  margin-top: 3rem;
}

.result .line {
  display: flex;
  align-items: center;
  margin-bottom: 1.5rem;
  font-size: var(--font-size-lg);
}

.result .line span {
  margin-left: auto;
}

.result-bonushint {
  display: none;
}

.platform-result-template {
  display: none;
}


/*============= Total results =============*/
.total-results,
.total-positive,
.total-negative {
  display: none;
}

.total-results {
  margin-top: 4rem;
}

.total-box {
  padding: 2rem;
  border-radius: var(--border-radius);
  color: var(--white);
  font-size: var(--font-size-lg);
}

.total-positive {
  background-color: var(--green);
}

.total-negative {
  background-color: var(--red);
}

.total-profit {
  font-size: var(--font-size-xl);
}


/*============= Footer =============*/
.footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 2px solid var(--gray-850);
  font-size: var(--font-size-sm);
  text-align: center;
  color: var(--gray-700);
}

.footer a {
  color: var(--gray-650);
}

.footer a:hover,
.footer a:focus,
.footer a:active {
  color: var(--gray-600);
}


/*============= About page =============*/
.about h2,
.about h3 {
  margin-top: 3rem;
}

.about p,
.about ul,
.about ol {
  margin: 0 0 2rem;
}


/*============= Media Queries =============*/
@media screen and (min-width: 720px) {

  .platform-detail .platform-sales-input {
    width: 50%;
    margin-top: 0;
  }
}

@media screen and (min-width: 992px) {

  .form {
    max-width: 80%;
  }

  .results .line {
    margin-bottom: 1rem;
  }
}


/*============= Animations =============*/
@keyframes loading {
  0% {
    transform: scale(1);
  }
  20% {
    transform: scale(1.5);
  }
  40% {
    transform: scale(1);
  }
}