/* CSS reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}

html {
  height: 100%;
}
body {
  height: 100%;
  margin: 0;
  background-color: #f8f8f8;
  font-family:  Arial, Verdana, Tahoma, sans-serif;
  /* https://stackoverflow.com/a/24392249/12660887 */
  position: relative;
}
main {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  flex-wrap: nowrap;
  font-size: 1.25rem;
}
h1 {
  font-size: 2rem;
  font-weight: bold;
  text-align: center;
  display: block;
  margin: 10px 0;
}
h4 {
  font-size: 1.5rem;
  font-weight: bold;
  text-align: center;
  display: block;
  margin: 10px 0;
  color: darkgreen;
}
a {
  text-decoration: none;
}
.bold {
  font-weight: bold;
}
button {
  background-color: #757575;
  border: none;
  color: white;
  padding: 10px 15px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 1em;
  cursor: pointer;
  border-radius: 20%;
  margin: 15px 0;
}
button:hover, button.block-btn:hover {
  background-color: #b11adc;
}
button.block-btn {
  display: block;
  background-color: #01786F;
  margin: 0 auto 30px auto; /*TODO: margin-bottom 20px ? */
  font-size: 2rem;
  padding: 15px 32px;
}
button.cancel-something {
  background-color: darkred;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

/* "Sticky footer" */
#footer {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50px;
  text-align: center;
}
@media(max-height: 399px) {
  #footer {
    display: none;
  }
}
a.left-link {
  margin-right: 25px;
}
a.right-link {
  margin-left: 25px;
}
#footer a > img {
  height: 1.2em;
  display: inline-block;
  transform: translateY(3px);
}

main > div {
  margin-top: 25vh;
  min-height: 500px;
  min-width: 320px;
}
#gameInfos {
  max-width: 800px;
}
@media(max-height: 800px) {
  #newGameForm, #gameInfos {
    margin-top: 30px;
  }
}
@media(max-width: 767px) {
  main > div {
    padding: 0 10px;
  }
}
#gameInfos,
#boardContainer,
#gameStopped,
#pendingSeek,
#pendingRematch,
#newGameForm {
  display: none;
}
#gameStopped > h1 {
  margin-bottom: 10px;
}

#gameInfos > .players-info {
  text-align: center;
}
#gameInfos > .options-info {
  text-align: center;
  color: #757575;
  margin-bottom: 15px;
}
#gameInfos > div {
  margin: 10px 0;
}
#gameInfos > .rules {
  color: #732E6C;
}
#gameInfos > .rules p,
#gameInfos > .rules ul,
#gameInfos > .rules ol {
  margin: 10px 0;
}
#gameInfos > .rules ul {
  list-style-type: square;
  padding-left: 30px;
}
#gameInfos > .rules ol {
  list-style-type: numeric;
  padding-left: 30px;
}
#gameInfos > .rules a {
  padding-bottom: 1px;
  border-bottom: 1px dotted black;
}
#gameInfos > .rules .author {
  color: darkblue;
  font-style: italic;
}

/* Complete rules (separate page) */
.full-rules {
  max-width: 800px;
  margin: 20px auto;
  padding: 0 10px;
  overflow: auto;
}
.full-rules figure.show-pieces {
  max-width: 90%;
  text-align: center;
  margin: 0 auto;
}
.full-rules figure.show-pieces > img {
  max-width: 100px;
}
.full-rules > div {
  margin-bottom: 20px;
}
.full-rules h1, .full-rules h2, .full-rules h3, .full-rules h4 {
  font-weight: bold;
  display: block;
}
.full-rules h1 {
  font-size: 2.5em;
  margin: 10px 0 20px 0;
}
.full-rules h2 {
  color: darkred;
  font-size: 2em;
  margin: 10px 0;
}
.full-rules h3 {
  color: darkviolet;
  font-size: 1.8em;
  margin: 10px 0;
}
.full-rules h4 {
  color: darkgreen;
  font-size: 1.5em;
  margin: 5px 0;
  text-align: center;
}
piece.mark {
  background-image: url('/pieces/mark.8c5f2e3c.svg');
}
piece.mark.transparent {
  opacity: 0.65;
}
.full-rules figure {
  display: block;
  overflow: visible;
  margin-top: 20px;
}
.full-rules figure::after {
  content: '';
  display: block;
  clear: both;
  margin-bottom: 20px;
}
.full-rules .diag {
  position: relative;
  margin: 0 auto;
}
.full-rules .left {
  float: left;
}
.full-rules .right {
  float: right;
}
@media screen and (max-width: 550px) {
  .full-rules .left {
    float: none;
    margin-bottom: 10px;
  }
  .full-rules .right {
    float: none;
    margin-top: 10px;
  }
}
.full-rules figcaption {
  display: block;
  text-align: center;
  clear: both;
  font-size: 0.9em;
  color: #0D1C46;
  font-weight: bold;
}
.full-rules .img-center {
  display: block;
  margin: 0 auto;
}
/* TODO: use same CSS for rules and full-rules? */
.full-rules p, .full-rules ul, .full-rules ol {
  margin: 10px 0;
}
.full-rules ul {
  list-style-type: square;
  padding-left: 30px;
}
.full-rules ol {
  list-style-type: numeric;
  padding-left: 30px;
}

#ng-select {
  margin-bottom: 20px;
}
/* Options when starting custom game */
.words {
  line-height: 0.9em;
  margin-top: 15px;
}
.words > .row {
  margin: 0;
}
.words span {
  cursor: pointer;
  padding: 3px;
  display: inline-block;
  margin: 2px;
}
.highlight-word {
  background-color: lightblue;
}
#gameOptions {
  text-align: center;
}
.option-select, .option-input {
  margin: 15px 0 0 0;
}
.option-input {
  display: inline-block;
  margin-right: 15px;
}
.option-input input[type=number] {
  width: 64px;
}
.btn-wrap {
  text-align: center;
}

#gameLink {
  width: inherit;
  text-align: center;
}
/* Game link div + custom game "button" */
#gameLink span, #gameLink a, #footer a {
  padding-bottom: 1px;
  border-bottom: 1px dotted darkgrey;
  color: darkred;
}
#gameLink span {
  display: inline-box;
  cursor: pointer;
}
#gameLink > p {
  margin: 10px 0;
}

/* Board container (with reserves) */
#boardContainer {
  position: fixed;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  margin: 0;
  padding: 0;
  border: none;
}
#upLeftInfos {
  position: absolute;
  left: 0;
  top: 0;
}
#upRightStop {
  position: absolute;
  left: calc(100% - 25px);
  top: 0;
}
#upLeftInfos > svg, #upRightStop > svg {
  width: 25px;
  cursor: pointer;
}
@media(max-width: 767px) {
  #upRightStop {
    left: calc(100% - 35px);
  }
  #upLeftInfos > svg, #upRightStop > svg {
    width: 35px;
  }
  #upLeftInfos > svg path, #upRightStop > svg path {
    fill: #999;
  }
}
/* Playing board (without reserves) */
.chessboard {
  position: absolute;
  cursor: pointer;
}
piece {
  position: absolute;
  top: 0;
  left: 0;
  background-size: cover;
  z-index: 2;
  will-change: transform;
  pointer-events: none;
}
piece.hidden {
  display: none;
}
/* Drawing of the board */
.chessboard_SVG {
  width: 100%;
  height: 100%;
}
/* Default squares colors (can be overriden or unused) */
.dark-square {
  fill: #b58863;
}
.light-square {
  fill: #f0d9b5;
}
.in-shadow {
  filter: brightness(50%);
}
.reserves {
  position: absolute;
  display: block;
  cursor: pointer;
}
.reserve-cell {
  position: relative;
  display: block;
  float: left;
}
/* Pieces' counter for reserves */
.reserve-num {
  color: red;
  position: absolute;
  display: block;
  font-weight: bold;
}
/* Choices div after a promotion */
#choices, .choice {
  position: absolute;
  cursor: pointer;
}

/* https://moderncss.dev/custom-select-styles-with-pure-css/ */
:root {
  --select-border: #777;
  --select-focus: #b11adc;
  --select-arrow: var(--select-border);
}
select {
  appearance: none;
  background-color: transparent;
  border: none;
  padding: 0 1em 0 0;
  margin: 0;
  width: 100%;
  font-family: inherit;
  font-size: inherit;
  cursor: inherit;
  line-height: inherit;
  z-index: 1;
  outline: none;
}
.select {
  display: grid;
  grid-template-areas: "select";
  align-items: center;
  position: relative;
  min-width: 15ch;
  max-width: 30ch;
  border: 1px solid var(--select-border);
  border-radius: 0.25em;
  padding: 0.25em 0.5em;
  font-size: 1.25rem;
  cursor: pointer;
  line-height: 1.1;
  background-color: #fff;
  background-image: linear-gradient(to top, #f9f9f9, #fff 33%);
  width: 100%;
  margin: auto;
}
select, .select::after {
  grid-area: select;
}
.select::after {
  content: "";
  justify-self: end;
  width: 0.8em;
  height: 0.5em;
  background-color: var(--select-arrow);
  clip-path: polygon(100% 0%, 0 0%, 50% 100%);
}
select:focus + .focus {
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  bottom: -1px;
  border: 2px solid var(--select-focus);
  border-radius: inherit;
}

/* https://auralinna.blog/post/2018/how-to-create-material-design-like-form-text-fields/ */
.form-field {
  display: block;
  margin-bottom: 16px;
}
.form-field--is-active .form-field__control::after {
  border-bottom: 2px solid #b11adc;
  transform: scaleX(150);
}
.form-field--is-active .form-field__label {
  color: #b11adc;
  font-size: 0.75rem;
  transform: translateY(-14px);
}
.form-field--is-filled .form-field__label {
  font-size: 0.75rem;
  transform: translateY(-14px);
}
.form-field__label {
  display: block;
  font-size: 1.2rem;
  font-weight: normal;
  left: 0;
  margin: 0;
  padding: 18px 12px 0;
  position: absolute;
  top: 0;
  transition: all 0.4s;
  width: 100%;
}
.form-field__control {
  background: #eee;
  border-radius: 8px 8px 0 0;
  overflow: hidden;
  position: relative;
  width: 100%;
}
.form-field__control::after {
  border-bottom: 2px solid #b11adc;
  bottom: 0;
  content: "";
  display: block;
  left: 0;
  margin: 0 auto;
  position: absolute;
  right: 0;
  transform: scaleX(0);
  transition: all 0.4s;
  width: 1%;
}
.form-field__input {
  appearance: none;
  background: transparent;
  border: 0;
  border-bottom: 1px solid #999;
  color: #333;
  display: block;
  font-size: 1.2rem;
  margin-top: 24px;
  outline: 0;
  padding: 0 12px 10px 12px;
  width: 100%;
}

label.input-checkbox {
  cursor: pointer;
}
/* https://dev.to/kallmanation/styling-a-checkbox-with-only-css-3o3p */
label.input-checkbox > input[type="checkbox"] {
  display: none;
}
label.input-checkbox > input[type="checkbox"] + *::before {
  content: "";
  display: inline-block;
  vertical-align: bottom;
  margin-bottom: 3px;
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 10%;
  border-style: solid;
  border-width: 0.1rem;
  border-color: gray;
}
label.input-checkbox > input[type="checkbox"]:checked + *::before {
  content: "✓";
  font-size: 1.1rem;
  color: white;
  text-align: center;
  background: teal;
  border-color: teal;
}
label.input-checkbox > input[type="checkbox"]:checked + * {
  color: teal;
}
label.input-checkbox > span.spacer {
  width: 10px;
  content: " ";
}
label.input-checkbox > span.after-spacer {
  padding-left: 5px;
}

/* https://theanam.github.io/css-only-loaders/ ("hour-glass") */
:root{
  --loader-width: 70px;
  --loader-height: 70px;
  --loader-color-primary: #01786F;
  --loader-color-secondary: #EEE;
  --line-width: 3px;
  --animation-duration: 3s;
  --loader-initial-scale: 0.1;
}
.loader,.loader:before,.loader:after{
  box-sizing: border-box;
  flex-grow: 0;
  flex-shrink: 0;
}
@keyframes slide {
  0% {
    transform: translateY(0%);
  }
  25% {
    transform: translateY(100%);
  }
  50% {
    transform: translateY(100%);
  }
  75% {
    transform: translateY(0%);
  }
  100% {
    transform: translateY(0%);
  }
}
@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  25% {
    transform: rotate(0deg);
  }
  50% {
    transform: rotate(180deg);
  }
  75% {
    transform: rotate(180deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
.loader.hour-glass {
  position: relative;
  width: var(--loader-width, 100px);
  height: var(--loader-height, 100px);
  background-color: var(--loader-color-primary, #00f);
  -webkit-clip-path: polygon(0% 0%, 100% 0%, 50% 50%, 100% 100%, 0% 100%, 50% 50%);
  clip-path: polygon(0% 0%, 100% 0%, 50% 50%, 100% 100%, 0% 100%, 50% 50%);
  overflow: hidden;
  animation: spin var(--animation-duration, 4s) infinite ease-in-out;
  margin: 20px auto;
}
.hour-glass:before {
  content: "";
  position: absolute;
  top: 0px;
  left: 0px;
  width: var(--loader-width, 100px);
  height: 50%;
  background-color: var(--loader-color-secondary, #eee);
  animation: slide var(--animation-duration, 4s) infinite ease-in-out;
}