:root {
  --purple-dark: #2d1b5a;
  --purple: #7c5cd6;
  --purple-light: #ede8fb;
  --yellow: #f1c40f;
}

html, body {
  font-size: 16px;
}

body {
  padding: 0 20px;
  background-image: url('maze-white.png');
  background-color: #fafafa;
  color: #333;
}

#header {
  text-align: center;
  color: #fdfdfd;
  padding: 50px 5px 80px;
  border-bottom: 1px solid #ddd;
  margin: 0 -35px 30px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 2.5vw), 0 100%);
  background-color: var(--purple);
  background-image: url('diagonals.png');
}

#pagetitle {
  font-size: 3.2em;
  line-height: 1.2;
  margin-bottom: 4px;
}

#subtitle {
  font-size: 1.5em;
  margin-bottom: 8px;
  line-height: 1.1;
}

#subsubtitle {
  font-size: 1.1em;
}

#subsubtitle a {
  color: #fdfdfd;
  text-decoration: underline;
}

@media only screen and (max-height: 800px) {
  #header {
    padding: 15px 5px 60px;
  }
}

@media only screen and (max-width: 979px) {
  #header {
    padding: 15px 5px 40px;
  }

  #pagetitle {
    font-size: 2.6em;
  }

  #subtitle {
    font-size: 1.3em;
  }

  #subsubtitle {
    font-size: 1em;
  }
}

#main {
  max-width: 1000px;
  margin: 0 auto 15px;
}

#intro {
  text-align: center;
  margin-bottom: 16px;
}

.pa-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: flex-start;
  justify-content: center;
}

/* The history card is as tall as the editor next to it, and the log fills whatever space is left */
.pa-history {
  flex: 1 1 320px;
  min-width: 300px;
  align-self: stretch;
  display: flex;
  flex-direction: column;
}

.pa-log {
  flex: 1 1 0;
  min-height: 140px;
  display: flex;
  flex-direction: column;
}

.pa-log pre {
  flex: 1 1 0;
  min-height: 0;
  margin-bottom: 0;
  overflow-y: auto;
}

.pa-card {
  background: #fff;
  border: 1px solid #e3e0ee;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(45, 27, 90, 0.08);
  padding: 16px 18px;
  margin-bottom: 24px;
}

.pa-card h4 {
  margin-top: 0;
  color: var(--purple-dark);
  font-weight: bold;
}

.pa-card pre {
  background: var(--purple-light);
  border: none;
  color: var(--purple-dark);
  white-space: pre-wrap;
  word-break: break-word;
}

.pa-editor {
  flex: 0 1 auto;
  max-width: 100%;
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.pa-controls {
  flex: 0 0 130px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.pa-actions,
.pa-tools {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pa-tools {
  border-top: 2px solid #d6cff0;
  padding-top: 16px;
}

.pa-controls .btn {
  width: 100%;
}

#pa-grid {
  display: grid;
  grid-template-columns: repeat(var(--size), 1fr);
  grid-auto-rows: 1fr;
  aspect-ratio: 1;
  border: 3px solid var(--purple-dark);
  border-radius: 4px;
  width: max(256px, min(420px, 100vh - 250px));
  max-width: 100%;
  user-select: none;
  touch-action: none;
  cursor: crosshair;
}

#pa-grid[data-tool="paint"] {
  cursor: url("cursor-paint.svg") 3 25, crosshair;
}

#pa-grid[data-tool="erase"] {
  cursor: url("cursor-erase.svg") 6 21, crosshair;
}

#pa-grid[data-tool="fill"] {
  cursor: url("cursor-fill.svg") 3 25, crosshair;
}

.pa-cell {
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.pa-cell:hover {
  filter: brightness(0.9);
}

.pa-toolbar {
  margin: 4px 0 12px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.btn-primary,
.btn-primary:focus {
  background-color: var(--purple);
  border-color: var(--purple);
}

.btn-primary:hover,
.btn-primary:active {
  background-color: var(--purple-dark);
  border-color: var(--purple-dark);
}

.pa-controls .form-group {
  margin: 0;
}

.pa-controls .shiny-options-group {
  display: flex;
  flex-direction: column;
}

.pa-controls .radio-inline {
  margin: 0;
  padding: 0;
}

.pa-controls .radio-inline input {
  position: absolute;
  opacity: 0;
  margin: 0;
}

.pa-controls .radio-inline span {
  display: block;
  padding: 6px 16px;
  border: 1px solid var(--purple);
  color: var(--purple);
  text-align: center;
  cursor: pointer;
}

.pa-controls .radio-inline:first-child span {
  border-radius: 4px 4px 0 0;
}

.pa-controls .radio-inline:last-child span {
  border-radius: 0 0 4px 4px;
}

.pa-controls .radio-inline + .radio-inline span {
  margin-top: -1px;
}

.pa-controls .radio-inline input:checked + span {
  background: var(--purple);
  color: #fff;
}

@media only screen and (max-width: 640px) {
  .pa-editor {
    flex-direction: column;
  }

  .pa-controls {
    flex: none;
    width: 100%;
  }

  .pa-actions,
  .pa-tools {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
  }

  .pa-controls .btn {
    width: auto;
  }

  .pa-controls .shiny-options-group {
    flex-direction: row;
  }

  .pa-controls .radio-inline:first-child span {
    border-radius: 4px 0 0 4px;
  }

  .pa-controls .radio-inline:last-child span {
    border-radius: 0 4px 4px 0;
  }

  .pa-controls .radio-inline + .radio-inline span {
    margin-top: 0;
    margin-left: -1px;
  }
}

.pa-swatches {
  display: grid;
  grid-template-columns: repeat(4, 26px);
  gap: 8px;
  justify-content: space-between;
}

.pa-swatch {
  width: 26px;
  height: 26px;
  border: 2px solid #fff;
  border-radius: 50%;
  box-shadow: 0 0 0 1px #aaa;
  cursor: pointer;
  padding: 0;
}

.pa-swatch.active {
  box-shadow: 0 0 0 3px var(--purple);
}

/* History timeline */

.pa-timeline {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 8px 0;
}

.pa-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid #888;
  background: #fff;
  padding: 0;
  cursor: pointer;
}

.pa-dot:hover {
  transform: scale(1.2);
}

.pa-dot.undo {
  background: #457B9D;
  border-color: #457B9D;
}

.pa-dot.current {
  background: var(--yellow);
  border-color: #000;
  border-width: 2px;
}

.pa-dot.redo {
  border-style: dashed;
}