/*
Copyright (C) 2018 Alkis Georgopoulos <alkisg@gmail.com>.
SPDX-License-Identifier: CC-BY-SA-4.0
*/
* {
  box-sizing: border-box;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

html, body {  /* flexbox needs this to center the main div */
  width: 100%;
  height: 100%;
}

body {
  background-color: rgb(0,0,0);
  color: rgb(255,255,255);
  font-size: 10px;
  margin: 0;
  display: flex;
  align-items: center;  /* vertically center main div */
  justify-content: center;  /* horizontally center main div */
  overflow: hidden;  /* avoid scrollbars when dragging outside */
}

#main {
  /* SVG backgrounds need preserveAspectRatio="none" in many browsers. */
  background: rgb(255,255,255) url('resource/background.svg');
  -webkit-background-size: 100% 100%;
  -moz-background-size: 100% 100%;
  -o-background-size: 100% 100%;
  background-size: 100% 100%;
  height: 36em;
  width: 64em;
  text-align: center;
  overflow: hidden;
  padding-bottom: 5em; /* space for the menubar */
  display: flex;
  align-content: space-around;
  justify-content: space-around;
  flex-wrap: wrap;
  position: relative;
}

/* IE doesn't support @supports, so declare its style in the initial rule.
 Edge claims to support space-evenly but it doesn't, use space-around:
 https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/15947692/
 Finally, old android webviews don't support space-evely at all.
*/
@supports (align-content: space-evenly) and (not (-ms-ime-align: auto)) {
  #main {
    align-content: space-evenly !important;
    justify-content: space-evenly !important;
  }
}

#pattern, #characteristics, #solution {
  border: 0.1em solid rgba(0,0,0,0.5);
  border-radius: 1em;
  display: flex;
  flex-wrap: wrap;
}

#pattern {
  background-color: rgba(240,192,192,0.5);
  width: 55.8em;
  height: 5.2em;
  padding: 0.3em 0 0 0.3em; /* Omit the right/bot padding for miscalculations */
}

#characteristics {
  background-image: linear-gradient(rgba(192,192,192,0.5), rgba(255,255,255,0.75));
  width: 26.8em;
  padding: 0.4em 0 0 0.4em; /* Omit the right/bot padding for miscalculations */
}

#solution {
  position: relative;
  background-color: rgba(192,192,240,0.5);
  width: 21em;
  padding: 0.5em 0 0 0.5em; /* Omit the right/bot padding for miscalculations */
}

#pattern svg, #pattern img {
  width: 4.6em;
  height: 4.6em;
}

#characteristics svg, #pattern img {
  width: 6.5em;
  height: 6.5em;
}

#solution svg, #solution img {
  width: 20em;
  height: 20em;
}

#s1 {
  position: absolute;
  left: 0.5em;
  top: 0.5em;
  opacity: 0;
}

#characteristics svg, #p11 {
  cursor: pointer;
}

#characteristics svg:hover, #p11:hover {
  transform: scale(1.1);
}

#characteristics svg:active, #p11:active {
  transform: scale(1);
}

@-webkit-keyframes menubar_animation {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes menubar_animation {
  from { opacity: 0; }
  to { opacity: 1; }
}

#menubar {
  display: flex;
  align-items: center;
  -background-color: rgba(127,127,127,0.5);
  position: absolute;
  left: 0em;
  bottom: 0.5em;
  padding: 0 0.5em 0 0.5em;
  -border: 0.1em solid rgba(255,255,255,0.5);
  border-radius: 0 1em 1em 0;
  -webkit-animation: menubar_animation;
  animation-name: menubar_animation;
  -webkit-animation-duration: 4s;
  animation-duration: 4s;
}

#menubar img {
  width: 3.5em;
  height: 3.5em;
  margin: 0.5em;
  cursor: pointer;
}

#menubar img:hover {
  -webkit-filter: brightness(120%) contrast(1.2);
  filter: brightness(120%) contrast(1.2);
  transform: scale(1.1);
}

#menubar img:active {
  -webkit-filter: brightness(80%) contrast(1.2) !important;
  filter: brightness(80%) contrast(1.2) !important;
  transform: scale(1);
}

#menubar p {
  display: inline;
  font-size: 3em;
  margin: 0;
}

#dragimg {
  display: none;
  position: absolute;
  width: 6em;
  height: 6em;
  opacity: 0.5;
}

#help {
  display: none;  /* javascript toggles that to flex */
  align-items: center;
  justify-content: center;
  position: fixed;
  background-color: rgba(63,63,63,0.5);
  width: 100%;
  height: 100%;
  top: 0;  /* IE and old webview ignore "fixed" for flex childs */
  left: 0;
}

#help .dialog {
  text-align: center;
  width: 19em;
  background-color: rgb(255,255,255);
  color: rgb(0,0,0);
  padding: 1em;
  border: 0.2em solid rgb(80,80,80);
  border-radius: 0.5em;
  -webkit-filter: drop-shadow(0.5em 0.5em 0.5em rgb(80,80,80));
  filter: drop-shadow(0.5em 0.5em 0.5em rgb(80,80,80));
  font-size: 2em;
}