.echo-slide-and-fade-enter{opacity:1!important;-webkit-transform:translate3d(0,0,0)!important;-moz-transform:translate3d(0,0,0)!important;transform:translate3d(0,0,0)!important}.echo-slide-and-fade-enter.echo-slide-and-fade-enter-active{opacity:0!important;-webkit-transform:translate3d(0,-33%,0)!important;-moz-transform:translate3d(0,-33%,0)!important;transform:translate3d(0,-33%,0)!important;-webkit-transition:opacity .4s cubic-bezier(1,0,.9,1),-webkit-transform .8s cubic-bezier(0,1,.25,1)!important;-moz-transition:transform .8s cubic-bezier(0,1,.25,1),opacity .4s cubic-bezier(1,0,.9,1),-moz-transform .8s cubic-bezier(0,1,.25,1)!important;transition:transform .8s cubic-bezier(0,1,.25,1),opacity .4s cubic-bezier(1,0,.9,1)!important;transition:transform .8s cubic-bezier(0,1,.25,1),opacity .4s cubic-bezier(1,0,.9,1),-webkit-transform .8s cubic-bezier(0,1,.25,1),-moz-transform .8s cubic-bezier(0,1,.25,1)!important}.echo-fade-only-enter{opacity:1!important}.echo-fade-only-enter.echo-fade-only-enter-active{opacity:0!important;-webkit-transition:opacity .3s cubic-bezier(.25,0,.75,1)!important;-moz-transition:opacity .3s cubic-bezier(.25,0,.75,1)!important;transition:opacity .3s cubic-bezier(.25,0,.75,1)!important}.echo-long-fade-only-enter{opacity:1!important}.echo-long-fade-only-enter.echo-long-fade-only-enter-active{opacity:0!important;-webkit-transition:opacity .4s cubic-bezier(.75,0,.75,1)!important;-moz-transition:opacity .4s cubic-bezier(.75,0,.75,1)!important;transition:opacity .4s cubic-bezier(.75,0,.75,1)!important}.keypad-input .mq-editable-field .mq-cursor:not(:only-child),.keypad-input .mq-editable-field .mq-root-block.mq-hasCursor>.mq-cursor:only-child{height:20px!important;margin-top:-5px!important;vertical-align:middle!important}.keypad-input .mq-editable-field .mq-cursor{border-color:#78C008;border-left:2px solid #78C008!important;margin-left:-1px!important;margin-right:-1px!important;opacity:1!important;-webkit-transition:opacity .5s ease-out!important;-moz-transition:opacity .5s ease-out!important;transition:opacity .5s ease-out!important;visibility:visible!important}.keypad-input .mq-editable-field .mq-cursor.mq-blink{opacity:0!important;-webkit-transition:opacity .5s ease-in!important;-moz-transition:opacity .5s ease-in!important;transition:opacity .5s ease-in!important;visibility:visible!important}.keypad-input .mq-editable-field .mq-non-leaf .mq-cursor:only-child{border:2px solid #78C008!important;-webkit-border-radius:1px;-moz-border-radius:1px;border-radius:1px;opacity:1!important;padding:0 4px;-webkit-transition:border-color .5s ease-out!important;-moz-transition:border-color .5s ease-out!important;transition:border-color .5s ease-out!important}.keypad-input .mq-editable-field .mq-non-leaf .mq-cursor:only-child.mq-blink{border-color:#CCC!important;opacity:1!important;-webkit-transition:border-color .5s ease-in!important;-moz-transition:border-color .5s ease-in!important;transition:border-color .5s ease-in!important}.keypad-input .mq-empty{background:0 0!important}.keypad-input .mq-empty:not(.mq-root-block):after,.keypad-input .mq-hasCursor:empty:not(.mq-root-block):after{border:2px solid #CCC;-webkit-border-radius:1px;-moz-border-radius:1px;border-radius:1px;color:transparent;display:inline-block;margin-left:-1px;margin-right:-1px;padding:0 4px;visibility:visible!important}.keypad-input .mq-selection .mq-empty:not(.mq-root-block):after{border-color:#fff}.keypad-input .mq-hasCursor:empty:not(.mq-root-block):after{content:'c'}.keypad-input .mq-editable-field .mq-selection .mq-non-leaf,.keypad-input .mq-math-mode .mq-selection .mq-non-leaf{background:#78C008!important;border-color:#fff!important;color:#fff!important}.keypad-input .mq-editable-field .mq-selection .mq-scaled,.keypad-input .mq-math-mode .mq-selection .mq-scaled{background:0 0!important;border-color:transparent!important;color:#fff!important}.keypad-input .mq-selection{background:#78C008!important;border-color:#fff!important;color:#fff!important;display:inline-block!important}.keypad-container .katex{color:inherit!important}.popover-enter{opacity:0!important}.popover-enter.popover-enter-active{opacity:1!important;-webkit-transition:opacity .2s ease-out!important;-moz-transition:opacity .2s ease-out!important;transition:opacity .2s ease-out!important}
.perseus-sr-only {
  border: 0;
  clip: rect(0, 0, 0, 0);
  font-size: 0;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
}
.perseus-clearfix {
  *zoom: 1;
}
.perseus-clearfix:before,
.perseus-clearfix:after {
  content: "";
  display: table;
}
.perseus-clearfix:after {
  clear: both;
}
.framework-perseus.perseus-article:not(.bibliotron-article) .perseus-widget-container.widget-float-left {
  float: left;
  padding-right: 1em;
  max-width: 50%;
  width: 100%;
}
.framework-perseus.perseus-article:not(.bibliotron-article) .perseus-widget-container.widget-float-right {
  float: right;
  padding-left: 1em;
  max-width: 50%;
  width: 100%;
}
.framework-perseus.perseus-article:not(.bibliotron-article) .perseus-renderer > .paragraph {
  margin-left: auto;
  margin-right: auto;
  max-width: 700px;
}
.framework-perseus.perseus-article:not(.bibliotron-article) .paragraph.perseus-paragraph-full-width {
  margin-left: 0;
  margin-right: 0;
  max-width: none;
}
.framework-perseus.perseus-article:not(.bibliotron-article) .paragraph.perseus-paragraph-full-width > .paragraph {
  margin: 0;
  max-width: none;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-widget-container {
  font-size: 14px;
  line-height: 19.6px;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-widget-container.widget-float-left,
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-widget-container.widget-float-right {
  max-width: 50%;
  padding-top: 32px;
  width: 100%;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-widget-container.widget-float-left .perseus-image-caption .paragraph .paragraph,
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-widget-container.widget-float-right .perseus-image-caption .paragraph .paragraph {
  margin-bottom: 0;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-widget-container.widget-float-left {
  float: left;
  padding-right: 32px;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-widget-container.widget-float-right {
  float: right;
  padding-left: 32px;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-renderer > .paragraph {
  color: #21242c;
  font-size: 20px;
  line-height: 30px;
  margin: 0 auto;
  max-width: 688px;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-renderer > .paragraph .paragraph {
  color: #21242c;
  font-size: 20px;
  line-height: 30px;
  margin-bottom: 32px;
  margin-top: 0;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-renderer > .paragraph .paragraph .katex {
  font-size: 100%;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-renderer > .paragraph ul:not(.perseus-widget-radio) {
  color: #21242c;
  font-size: 20px;
  line-height: 30px;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) table {
  color: #21242c;
  font-size: 20px;
  line-height: 30px;
  margin-bottom: 32px;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) h2 {
  font-family: inherit;
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 16px;
  margin-top: 48px;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) h3 {
  font-family: inherit;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 16px;
  margin-top: 32px;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) h4,
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) h5,
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) h6 {
  font-family: inherit;
  font-size: 20px;
  font-weight: 700;
  line-height: 25px;
  margin-bottom: 16px;
  margin-top: 32px;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) blockquote {
  padding: 0 32px;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .MathJax .math {
  color: inherit;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-image-widget {
  text-align: center;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-image-caption .perseus-renderer .paragraph .paragraph,
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-image-caption .perseus-renderer .paragraph ol,
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-image-caption .perseus-renderer .paragraph ul {
  color: #999;
  font-size: 14px;
  line-height: 19px;
  margin: 16px auto 42px;
  max-width: 455px;
  text-align: left;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .paragraph.perseus-paragraph-full-width {
  margin-bottom: 32px;
  margin-left: 0;
  margin-right: 0;
  max-width: none;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .paragraph.perseus-paragraph-full-width > .paragraph {
  margin: 0;
  max-width: none;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .unresponsive-svg-image,
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .svg-image {
  font-size: 14px;
  line-height: 19.6px;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-block-math {
  margin-bottom: 32px;
  position: relative;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-block-math:before {
  background: linear-gradient(to right, rgba(255, 255, 255, 0) 0%, #ffffff 100%);
  bottom: 0;
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 30px;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-block-math-inner {
  overflow-x: auto;
  padding-bottom: 8px;
  padding-right: 20px;
  padding-top: 8px;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) > .clearfix:first-child > .perseus-renderer:first-child > .paragraph:first-child h1:first-child,
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) > .clearfix:first-child > .perseus-renderer:first-child > .paragraph:first-child h2:first-child,
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) > .clearfix:first-child > .perseus-renderer:first-child > .paragraph:first-child h3:first-child,
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) > .clearfix:first-child > .perseus-renderer:first-child > .paragraph:first-child h4:first-child,
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) > .clearfix:first-child > .perseus-renderer:first-child > .paragraph:first-child h5:first-child,
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) > .clearfix:first-child > .perseus-renderer:first-child > .paragraph:first-child h6:first-child {
  margin-top: 0;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-renderer > .paragraph .perseus-formats-tooltip {
  padding: 8px 12px;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-renderer > .paragraph .perseus-formats-tooltip .paragraph {
  margin-bottom: 0;
}
.bibliotron-article.framework-perseus.perseus-article:not(.perseus-mobile) .perseus-renderer > .paragraph .perseus-formats-tooltip .paragraph ul:not(.perseus-widget-radio) {
  font-size: 15px;
  line-height: 1.5;
  margin: 0;
}
.framework-perseus:not(.perseus-article):not(.perseus-mobile) .perseus-radio-option-content .perseus-renderer > .paragraph {
  font-family: inherit;
  font-size: 14px;
  line-height: 1.25;
  color: #21242c;
}
.framework-perseus:not(.perseus-article):not(.perseus-mobile) .perseus-radio-option-content .perseus-renderer > .paragraph .paragraph {
  font-family: inherit;
  font-size: 14px;
  line-height: 1.25;
  color: #21242c;
}
.framework-perseus:not(.perseus-article):not(.perseus-mobile) .perseus-radio-rationale-content .perseus-renderer > .paragraph {
  font-family: inherit;
  font-size: 14px;
  line-height: 1.25;
  color: #888d93;
}
.framework-perseus:not(.perseus-article):not(.perseus-mobile) .perseus-radio-rationale-content .perseus-renderer > .paragraph .paragraph {
  font-family: inherit;
  font-size: 14px;
  line-height: 1.25;
  color: #888d93;
}
.framework-perseus:not(.perseus-article):not(.perseus-mobile) .perseus-radio-rationale-content .perseus-renderer > .paragraph .paragraph .katex {
  color: #888d93;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile :not(blockquote) > div.paragraph,
.framework-perseus:not(.perseus-article).perseus-mobile :not(blockquote) > div.paragraph {
  margin: 0;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph,
.framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph {
  margin: 0 auto;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph:not(:first-child),
.framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph:not(:first-child) {
  margin-top: 32px;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph > .paragraph,
.framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph > .paragraph {
  margin: 0;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .clearfix > .perseus-renderer,
.framework-perseus:not(.perseus-article).perseus-mobile .clearfix > .perseus-renderer {
  margin-bottom: 32px;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph ul:not(.perseus-widget-radio),
.framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph ul:not(.perseus-widget-radio) {
  margin: 0 0 0 1em;
  padding: 0;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph ul:not(.perseus-widget-radio) > li,
.framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph ul:not(.perseus-widget-radio) > li {
  padding-left: 10px;
  margin-bottom: 24px;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph ol,
.framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph ol {
  margin: 0;
  padding-left: 32px;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph ol > li,
.framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph ol > li {
  list-style-type: decimal;
  margin-bottom: 24px;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph ol ol,
.framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph ol ol,
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph ul:not(.perseus-widget-radio) ol,
.framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph ul:not(.perseus-widget-radio) ol,
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph ol ul:not(.perseus-widget-radio),
.framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph ol ul:not(.perseus-widget-radio),
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph ul:not(.perseus-widget-radio) ul:not(.perseus-widget-radio),
.framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph ul:not(.perseus-widget-radio) ul:not(.perseus-widget-radio) {
  padding-top: 24px;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-block-math,
.framework-perseus:not(.perseus-article).perseus-mobile .perseus-block-math {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  -webkit-touch-callout: none;
}
@media (max-width: 767px) {
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph,
  .framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph {
    max-width: none;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile h1,
  .framework-perseus:not(.perseus-article).perseus-mobile h1 {
    font-weight: 700;
    padding-top: 0px;
    font-family: inherit;
    font-size: 24px;
    line-height: 1.2;
    color: #21242c;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile h2,
  .framework-perseus:not(.perseus-article).perseus-mobile h2 {
    font-weight: 700;
    padding-top: 16px;
    font-family: inherit;
    font-size: 24px;
    line-height: 1.2;
    color: #3b3e40;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile h3,
  .framework-perseus:not(.perseus-article).perseus-mobile h3,
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile h4,
  .framework-perseus:not(.perseus-article).perseus-mobile h4 {
    font-weight: 700;
    padding-top: 0px;
    font-family: inherit;
    font-size: 22px;
    line-height: 1.1;
    color: #626569;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile .default-body-text,
  .framework-perseus:not(.perseus-article).perseus-mobile .default-body-text {
    font-family: inherit;
    font-size: 18px;
    line-height: 1.4;
    color: #626569;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph,
  .framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph {
    font-family: inherit;
    font-size: 18px;
    line-height: 1.4;
    color: #626569;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph .paragraph,
  .framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph .paragraph {
    font-family: inherit;
    font-size: 18px;
    line-height: 1.4;
    color: #626569;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph ul:not(.perseus-widget-radio),
  .framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph ul:not(.perseus-widget-radio) {
    font-family: inherit;
    font-size: 18px;
    line-height: 1.4;
    color: #626569;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph ol,
  .framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph ol {
    font-family: inherit;
    font-size: 18px;
    line-height: 1.4;
    color: #626569;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile blockquote,
  .framework-perseus:not(.perseus-article).perseus-mobile blockquote {
    font-family: inherit;
    font-size: 18px;
    line-height: 1.4;
    color: #626569;
    color: #888d93;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile table,
  .framework-perseus:not(.perseus-article).perseus-mobile table {
    font-family: inherit;
    font-size: 18px;
    line-height: 1.4;
    color: #626569;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-radio-option-content .perseus-renderer > .paragraph,
  .framework-perseus:not(.perseus-article).perseus-mobile .perseus-radio-option-content .perseus-renderer > .paragraph {
    font-family: inherit;
    font-size: 16px;
    line-height: 1.25;
    color: #21242c;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-radio-option-content .perseus-renderer > .paragraph .paragraph,
  .framework-perseus:not(.perseus-article).perseus-mobile .perseus-radio-option-content .perseus-renderer > .paragraph .paragraph {
    font-family: inherit;
    font-size: 16px;
    line-height: 1.25;
    color: #21242c;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-radio-rationale-content .perseus-renderer > .paragraph,
  .framework-perseus:not(.perseus-article).perseus-mobile .perseus-radio-rationale-content .perseus-renderer > .paragraph {
    font-family: inherit;
    font-size: 16px;
    line-height: 1.25;
    color: #888d93;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-radio-rationale-content .perseus-renderer > .paragraph .paragraph,
  .framework-perseus:not(.perseus-article).perseus-mobile .perseus-radio-rationale-content .perseus-renderer > .paragraph .paragraph {
    font-family: inherit;
    font-size: 16px;
    line-height: 1.25;
    color: #888d93;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-radio-rationale-content .perseus-renderer > .paragraph .paragraph .katex,
  .framework-perseus:not(.perseus-article).perseus-mobile .perseus-radio-rationale-content .perseus-renderer > .paragraph .paragraph .katex {
    color: #888d93;
  }
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-image-caption .paragraph .paragraph,
  .framework-perseus:not(.perseus-article).perseus-mobile .perseus-image-caption .paragraph .paragraph {
    color: #888d93;
    font-size: 14px;
    line-height: 1.3;
    text-align: left;
  }
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}
@media (min-width: 768px) and (max-width: 1199px) {
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  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph ol,
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    font-family: inherit;
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    font-family: inherit;
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    font-family: inherit;
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    background-color: #f0f1f2;
    border-radius: 4px;
    padding: 16px;
    white-space: pre-wrap;
    margin: 0 0px;
  }
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    padding: 0 0 0 20px;
    border-left: 4px solid #d8d8d8;
  }
}
@media (min-width: 1200px) {
  .bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph,
  .framework-perseus:not(.perseus-article).perseus-mobile .perseus-renderer > .paragraph {
    max-width: 688px;
  }
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    font-family: inherit;
    font-size: 35px;
    line-height: 1.1;
    color: #21242c;
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    font-family: inherit;
    font-size: 35px;
    line-height: 1.1;
    color: #3b3e40;
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    font-family: inherit;
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    font-family: inherit;
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    font-family: inherit;
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    font-family: inherit;
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    font-family: inherit;
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    font-size: 20px;
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}
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  line-height: 19.6px;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-widget-container.widget-float-left,
.framework-perseus:not(.perseus-article).perseus-mobile .perseus-widget-container.widget-float-left,
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-widget-container.widget-float-right,
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}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-widget-container.widget-float-left .perseus-image-caption .paragraph .paragraph,
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.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-widget-container.widget-float-right .perseus-image-caption .paragraph .paragraph,
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  margin-bottom: 0;
}
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}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-widget-container.widget-float-right,
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}
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}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-image-widget,
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}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-block-math,
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  padding-bottom: 16px;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .paragraph.perseus-paragraph-full-width,
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  margin-right: 0;
  max-width: none;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .paragraph.perseus-paragraph-full-width > .paragraph,
.framework-perseus:not(.perseus-article).perseus-mobile .paragraph.perseus-paragraph-full-width > .paragraph {
  margin: 0;
  max-width: none;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .unresponsive-svg-image,
.framework-perseus:not(.perseus-article).perseus-mobile .unresponsive-svg-image,
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .svg-image,
.framework-perseus:not(.perseus-article).perseus-mobile .svg-image {
  font-size: 14px;
  line-height: 19.6px;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph .perseus-formats-tooltip,
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  padding: 8px 12px;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph .perseus-formats-tooltip .paragraph,
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  margin-bottom: 0;
}
.bibliotron-article.framework-perseus.perseus-article.perseus-mobile .perseus-renderer > .paragraph .perseus-formats-tooltip .paragraph ul:not(.perseus-widget-radio),
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}
/* Derived from the MIT-licensed zoom.js:
   https://github.com/fat/zoom.js/blob/fd4f3e43153da7596da0bade198e99f98b47791e/
*/
.zoomable {
  cursor: pointer;
  cursor: -webkit-zoom-in;
  cursor: -moz-zoom-in;
}
.zoom-img {
  background-color: white;
  position: absolute;
  z-index: 9001;
}
img.zoom-img {
  cursor: pointer;
  cursor: -webkit-zoom-out;
  cursor: -moz-zoom-out;
}
.zoom-transition {
  -webkit-transition: transform 300ms ease;
  -ms-transition: transform 300ms ease;
  transition: transform 300ms ease;
}
.zoom-overlay {
  z-index: 9000;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: scroll;
}
.zoom-overlay-open,
.zoom-overlay-transitioning {
  cursor: default;
}
.zoom-overlay-open {
  height: 100%;
  max-height: 100%;
  overflow: hidden;
}
.zoom-backdrop {
  z-index: 8999;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: white;
  opacity: 0;
  -webkit-transition: opacity 300ms;
  -ms-transition: opacity 300ms;
  transition: opacity 300ms;
}
.zoom-overlay-open > .zoom-backdrop {
  opacity: 0.9;
}
#perseus {
  position: relative;
}
.framework-perseus.perseus-mobile {
  margin-top: 48px;
}
.no-select {
  -moz-user-select: -moz-none;
  -khtml-user-select: none;
  -webkit-user-select: none;
  -o-user-select: none;
  user-select: none;
}
.blank-background {
  background-color: #FDFDFD;
}
#answer_area .blank-background {
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}
.above-scratchpad {
  position: relative;
  z-index: 2;
}
.graphie.above-scratchpad,
.graphie-container.above-scratchpad {
  background-color: #FDFDFD;
}
.perseus-mobile .graphie-container.above-scratchpad {
  background: #ffffff;
}
.graphie {
  -moz-user-select: -moz-none;
  -khtml-user-select: none;
  -webkit-user-select: none;
  -o-user-select: none;
  user-select: none;
}
.perseus-interactive,
.perseus-interactive.above-scratchpad {
  position: relative;
  z-index: 3;
}
#answercontent input[type=text].perseus-input-size-normal,
#answercontent input[type=number].perseus-input-size-normal,
.framework-perseus input[type=text].perseus-input-size-normal,
.framework-perseus input[type=number].perseus-input-size-normal {
  border: 1px solid #ccc;
  width: 80px;
}
#answercontent input[type=text].perseus-input-size-small,
#answercontent input[type=number].perseus-input-size-small,
.framework-perseus input[type=text].perseus-input-size-small,
.framework-perseus input[type=number].perseus-input-size-small {
  border: 1px solid #ccc;
  width: 40px;
}
.framework-perseus #problemarea input,
.framework-perseus #problemarea button {
  position: relative;
  z-index: 3;
}
.framework-perseus div.paragraph {
  font-size: 14px;
  line-height: 19.6px;
  margin: 22px 0px;
}
.framework-perseus div.instructions {
  display: block;
  font-style: italic;
  font-weight: bold;
}
.framework-perseus .perseus-renderer > .paragraph > ul:not(.perseus-widget-radio) {
  margin: -11px 0px 22px 0px;
}
.framework-perseus .paragraph ul:not(.perseus-widget-radio) {
  font-size: 14px;
  line-height: 19.6px;
  padding-left: 35px;
}
.framework-perseus .paragraph ul:not(.perseus-widget-radio) li {
  list-style-type: disc;
}
.framework-perseus .paragraph ol {
  list-style: decimal;
  padding-left: 2em;
}
.framework-perseus blockquote {
  padding: 0 2.5em;
}
.framework-perseus .zoomable {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  -webkit-touch-callout: none;
}
.framework-perseus sup:not(.mq-non-leaf) {
  font-size: smaller;
  vertical-align: super;
  line-height: 0;
}
.framework-perseus .range-input {
  border: 1px solid #ccc;
  border-radius: 5px;
  display: inline-block;
  padding: 0px 5px;
}
.framework-perseus .range-input > input {
  border: 0;
  display: inline;
  text-align: center;
  width: 30px;
}
.framework-perseus .range-input > span {
  color: #999;
  font-size: 14px;
}
.framework-perseus .number-input {
  border: 1px solid #ccc;
  border-radius: 5px;
  margin: 0;
  padding: 5px 0;
  text-align: center;
  width: 40px;
}
.framework-perseus .number-input.invalid-input {
  background-color: #ffbaba;
  outline-color: red;
}
.framework-perseus .number-input.mini {
  width: 40px;
}
.framework-perseus .number-input.small {
  width: 60px;
}
.framework-perseus .number-input.normal {
  width: 80px;
}
.framework-perseus .math-output {
  display: inline-block;
  min-width: 80px;
  min-height: 36px;
  border-radius: 5px;
  padding: 0;
  margin-top: 4px;
  margin-bottom: 4px;
  background: white;
  border: 1px solid #a4a4a4;
}
.framework-perseus .graph-settings .graph-settings-axis-label {
  border: 1px solid #ccc;
  border-radius: 5px;
  display: inline-block;
  padding: 5px 5px;
  width: 70px;
  float: right;
  margin: 0 5px;
}
.framework-perseus .graph-settings .graph-settings-background-url {
  width: 250px;
}
.framework-perseus .graphie-container {
  position: relative;
}
.framework-perseus .graph-settings,
.framework-perseus .image-settings,
.framework-perseus .misc-settings {
  padding-bottom: 5px;
}
.framework-perseus .misc-settings,
.framework-perseus .type-settings {
  border-top: 1px solid black;
  padding-top: 5px;
}
.framework-perseus .svg-image {
  display: inline-block;
}
.framework-perseus .unresponsive-svg-image,
.framework-perseus .perseus-rendered-radio .unresponsive-svg-image {
  display: inline-block;
  position: relative;
}
.framework-perseus .unresponsive-svg-image > .graphie-container,
.framework-perseus .perseus-rendered-radio .unresponsive-svg-image > .graphie-container {
  position: absolute;
  top: 0;
  left: 0;
}
.framework-perseus .fixed-to-responsive {
  position: relative;
  width: 100%;
}
.framework-perseus .fixed-to-responsive > :not(:first-child) {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
/* Legacy table styles. Remove when XOM is rolled out (see below for
   updated XOM styles). */
.framework-perseus:not(.perseus-mobile) table {
  font-size: 14px;
  line-height: 19.6px;
}
.framework-perseus:not(.perseus-mobile) table th,
.framework-perseus:not(.perseus-mobile) table td {
  padding: 5px 10px;
  text-align: left;
}
.framework-perseus:not(.perseus-mobile) table th[align=center],
.framework-perseus:not(.perseus-mobile) table td[align=center] {
  text-align: center;
}
.framework-perseus:not(.perseus-mobile) table th[align=right],
.framework-perseus:not(.perseus-mobile) table td[align=right] {
  text-align: right;
}
.framework-perseus:not(.perseus-mobile) table th {
  border-bottom: 2px solid #ccc;
  font-weight: bold;
  padding-bottom: 2px;
}
.framework-perseus:not(.perseus-mobile) table tr:nth-child(odd) td {
  background-color: #ededed;
}
.framework-perseus:not(.perseus-mobile) .perseus-titled-table {
  display: inline-block;
}
.framework-perseus:not(.perseus-mobile) .perseus-titled-table table {
  margin-left: auto;
  margin-right: auto;
}
.framework-perseus:not(.perseus-mobile) .perseus-table-title {
  text-align: center;
  font-size: larger;
}
.framework-perseus:not(.perseus-mobile) table.non-markdown tr:nth-child(odd) td {
  background-color: transparent;
}
.framework-perseus:not(.perseus-mobile) table.non-markdown th,
.framework-perseus:not(.perseus-mobile) table.non-markdown td {
  border-width: 0;
}
/* New XOM styles for tables. */
.framework-perseus.perseus-mobile {
  /* There are three kinds of tables:
       1) normal "tables" - emitted by markdown (src/perseus-markdown.jsx)
       2) "titled tables" - emitted by markdown as well (these are just
          tables with a title, and encased in one more element)
       3) "table widget" - where a user is expected to enter answers in a
          table form (src/widgets/table.jsx).
      Moreover, there the Categorizer widget uses <table> tags, so these
      stylings will apply there as well.  */
}
.framework-perseus.perseus-mobile table {
  border-collapse: collapse;
  margin: 0 auto;
}
.framework-perseus.perseus-mobile table tbody > tr {
  border: 1px solid #e5e5e5;
}
.framework-perseus.perseus-mobile table th,
.framework-perseus.perseus-mobile table td {
  padding: 16px;
  text-align: left;
}
.framework-perseus.perseus-mobile table th[align=center],
.framework-perseus.perseus-mobile table td[align=center] {
  text-align: center;
}
.framework-perseus.perseus-mobile table th[align=right],
.framework-perseus.perseus-mobile table td[align=right] {
  text-align: right;
}
.framework-perseus.perseus-mobile table td {
  background: #fff;
}
.framework-perseus.perseus-mobile table th {
  font-weight: bold;
}
@media (max-width: 767px) {
  .framework-perseus.perseus-mobile table {
    width: 100%;
    min-width: 480px;
  }
  .framework-perseus.perseus-mobile table tbody > tr {
    border-left: 0;
    border-right: 0;
  }
}
.framework-perseus.perseus-mobile .perseus-titled-table {
  display: inline-block;
}
.framework-perseus.perseus-mobile .perseus-table-title {
  text-align: center;
  font-size: larger;
}
/* Widget CSS */
.perseus-graph-padding {
  padding: 25px 25px 0 0;
}
.categorizer-container {
  margin-top: 20px;
}
.categorizer-container div.paragraph {
  margin: 10px 0px;
}
.categorizer-container .category {
  text-align: center;
}
.categorizer-container table {
  min-width: 0;
}
.categorizer-container label {
  position: relative;
  z-index: 2;
}
body.mobile .categorizer-container td.category input[type="radio"]:checked + span:before {
  color: #1c758a;
}
body.mobile .categorizer-container td.category input[type="radio"] + span:active:before {
  color: #666;
  content: "\f111";
}
.perseus-widget-dropdown {
  position: relative;
}
.perseus-widget-expression {
  position: relative;
}
.perseus-widget-expression > span,
.perseus-widget-expression .error-tooltip {
  display: inline-block;
  vertical-align: middle;
}
.perseus-widget-expression .error-tooltip {
  position: absolute;
  right: 6px;
  top: -2px;
}
.perseus-widget-expression .error-icon {
  color: #fcc335;
  cursor: pointer;
  font-size: 20px;
  position: relative;
  z-index: 3;
}
.perseus-widget-expression .error-text {
  background-color: #fff;
  padding: 5px;
  width: 210px;
}
.perseus-widget-expression.show-error-tooltip .perseus-math-input.mq-editable-field.mq-math-mode > .mq-root-block {
  padding-right: 25px;
}
.perseus-widget-expression .perseus-formats-tooltip {
  width: 190px;
}
#answer_area .perseus-widget-expression .perseus-math-input.mq-editable-field.mq-math-mode {
  min-width: 130px;
}
#answer_area .perseus-widget-expression .error-tooltip .error-text-container {
  left: -125px !important;
  top: -17px !important;
}
#answer_area .perseus-widget-expression .error-tooltip .error-text {
  font-size: 12px;
  width: 90px;
}
#answer_area .perseus-widget-expression .error-tooltip .tooltipContainer > div:first-child {
  visibility: hidden !important;
}
.perseus-widget-expression-old,
.perseus-widget-expression-old > .output,
.perseus-widget-expression-old > .output > .tex,
.perseus-widget-expression-old > .output > .placeholder {
  display: block;
}
.perseus-widget-expression-old input,
#answer_area .perseus-widget-expression-old input {
  direction: ltr;
  border: 1px solid #a4a4a4;
  border-radius: 5px;
  box-sizing: border-box;
  font-size: 14px;
  margin-bottom: 5px;
  max-width: 240px;
  padding: 6px;
  width: 100%;
}
.perseus-widget-expression-old > .output {
  background: #f2f2f2;
  border-radius: 5px;
  padding: 10px;
  margin: 10px 0;
}
#answer_area .perseus-widget-expression-old > .output {
  background: #f7f7f7;
}
.perseus-widget-expression-old > .output > .tex {
  overflow-x: auto;
  padding: 5px;
}
.perseus-widget-expression-old > .output > .placeholder {
  position: relative;
  height: 40px;
  overflow-y: hidden;
}
.perseus-widget-expression-old > .output > .placeholder > .error {
  -webkit-border-radius: 10px;
  -moz-border-radius: 10px;
  border-radius: 10px;
  background: #f7f7f7;
  border: 1px solid #ddd;
  box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.5);
  color: #000;
  display: none;
  font-weight: normal;
  min-height: 22px;
  width: 168px;
  position: absolute;
  top: 0px;
  left: 40px;
  margin: auto;
}
.perseus-widget-expression-old > .output > .placeholder > .error > .buddy {
  background-image: url(../www.khanacademy.org/images/perseus/error-buddy.png);
  background-size: 100%;
  height: 36px;
  width: 40px;
  position: absolute;
  top: -3px;
  left: -42px;
}
.perseus-widget-expression-old > .output > .placeholder > .error > .message {
  font: 12px "Proxima Nova", sans-serif;
  line-height: 1.4em;
  margin: 0px 4px;
}
.perseus-widget-grapher {
  padding: 25px 25px 0 0;
}
.perseus-widget-grapher > .graphie-container {
  position: relative;
}
.perseus-widget-grapher > .graphie-container > img,
.perseus-widget-grapher > .graphie-container .svg-image {
  position: absolute;
}
.framework-perseus .perseus-graded-group {
  position: relative;
  width: 100%;
  margin-left: 3px;
  padding-left: 5px;
}
.framework-perseus .perseus-graded-group.answer-correct {
  border-left: 3px solid #76a005;
  margin-left: 0;
}
.framework-perseus .perseus-graded-group.answer-incorrect {
  border-left: 3px solid #ff8787;
  margin-left: 0;
}
.framework-perseus .perseus-graded-group .group-icon {
  font-size: 14px;
  position: absolute;
  top: 50%;
  top: calc(50% - 7px);
  left: -19px;
  text-align: center;
  width: 16px;
}
.framework-perseus .perseus-group {
  position: relative;
  width: 100%;
}
.framework-perseus .perseus-group .group-icon {
  font-size: 14px;
  position: absolute;
  top: 50%;
  top: calc(50% - 7px);
  margin-left: -20px;
}
.perseus-image-widget .perseus-image-title {
  text-align: center;
}
.perseus-image-editor .label-settings td {
  padding: 5px 4px;
  text-align: center;
}
.perseus-image-editor .label-settings tr:nth-child(odd) td {
  background-color: transparent;
}
.perseus-image-editor .label-settings th,
.perseus-image-editor .label-settings td {
  border-width: 0;
}
.perseus-image-editor .image-settings,
.perseus-image-editor .graph-settings {
  margin-top: 5px;
}
.perseus-widget-interactive-graph {
  padding: 25px 25px 0 0;
}
.perseus-widget-interactive-graph > .graphie-container {
  position: relative;
}
.perseus-widget-interactive-graph > .graphie-container > img,
.perseus-widget-interactive-graph > .graphie-container > .unresponsive-svg-image {
  position: absolute;
  bottom: 0;
  left: 0;
}
.perseus-mobile .tooltip.visible {
  z-index: 2;
}
.perseus-mobile .tooltip.visible .tooltip-content:before {
  border: solid;
  border-color: white transparent;
  border-width: 10px 10px 0 10px;
  bottom: -10px;
  content: "";
  left: 50%;
  transform: translateX(-50%);
  position: absolute;
  z-index: 2;
}
.perseus-mobile .tooltip .tooltip-content {
  display: none;
}
.perseus-mobile .tooltip.visible .tooltip-content {
  display: inline-block;
  background-color: #ffffff;
  border-radius: 5px;
  bottom: 50px;
  left: 50%;
  transform: translateX(-50%);
  padding: 5px;
  position: absolute;
  white-space: nowrap;
  min-width: 30px;
  text-align: center;
}
.perseus-mobile .tooltip.visible .tooltip-content .katex {
  color: #71b307 !important;
}
.perseus-mobile .graphie-label .katex {
  color: inherit !important;
}
.perseus-widget-matcher {
  /* Ideally we'd get rid of this, as most of the styles have been moved
       to inline styles using Aphrodite, but this is a hacky "reach-in" into
       descendent widgets that we can't modify */
}
.perseus-widget-matcher div.paragraph {
  margin: 0;
}
.perseus-matrix .matrix-prefix,
.perseus-matrix .matrix-suffix {
  display: inline-block;
  margin: 10px 5px 0 10px;
  vertical-align: top;
}
.perseus-matrix .matrix-suffix {
  margin: 10px 10px 0 5px;
}
.perseus-matrix div.paragraph {
  margin: 0;
}
.perseus-matrix .matrix-input {
  background: #e2e2e2;
  display: inline-block;
  margin: 5px;
  padding: 3px;
  position: relative;
  width: auto;
}
.perseus-matrix .matrix-row {
  white-space: nowrap;
}
.perseus-matrix .matrix-bracket {
  border-color: #666666;
  border-style: solid;
  border-bottom-width: 2px;
  border-top-width: 2px;
  margin-top: -2px;
  position: absolute;
  width: 6px;
}
.perseus-matrix .matrix-bracket.bracket-left {
  border-color: #666666;
  border-left-width: 2px;
  left: 3px;
}
.perseus-matrix .matrix-bracket.bracket-right {
  border-color: #666666;
  border-right-width: 2px;
  margin-left: -3px;
}
.perseus-matrix input,
.perseus-matrix .number-input {
  border: none;
  border-radius: 0;
  box-sizing: border-box;
  margin: 3px;
  padding: 0;
  text-align: center;
}
.perseus-matrix input.outside,
.perseus-matrix .number-input.outside {
  background: #f3f3f3;
}
.perseus-matrix input:focus,
.perseus-matrix .number-input:focus {
  border: none;
  outline: none;
}
.static-mode.perseus-matrix input,
.static-mode.perseus-matrix .number-input {
  background: #f5f5f5;
}
.perseus-matrix.the-matrix .matrix-bracket,
.perseus-matrix.the-matrix .matrix-left,
.perseus-matrix.the-matrix .matrix-right {
  border-color: #29F139;
}
.perseus-matrix.the-matrix .matrix-input {
  background: #222;
}
.perseus-matrix.the-matrix input,
.perseus-matrix.the-matrix .number-input {
  background: #666;
  color: #29F139;
  font-weight: bold;
}
.perseus-matrix.the-matrix input.outside,
.perseus-matrix.the-matrix .number-input.outside {
  background: #444;
}
body.mobile .perseus-matrix .matrix-input {
  display: table;
}
body.mobile .perseus-matrix .matrix-row {
  display: table-row;
}
body.mobile .perseus-matrix .matrix-input-field {
  display: table-cell;
}
body.mobile .perseus-matrix .math-output {
  margin: 4px 4px 2px 4px;
  max-height: 36px;
  max-width: 80px;
  overflow: hidden;
}
.perseus-matrix-editor .perseus-single-editor {
  width: 338px;
}
.perseus-widget-measurer {
  position: relative;
}
.perseus-widget-measurer img {
  position: absolute;
}
.perseus-widget-measurer-url {
  width: 70%;
}
.orderer {
  position: relative;
  min-width: 480px;
}
.orderer.layout-horizontal .draggable-box {
  margin-left: 0;
  margin-top: 30px;
  padding: 13px;
}
.orderer .card {
  padding: 0 10px;
  cursor: pointer;
  position: relative;
  user-select: none;
  width: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.orderer.height-normal.layout-horizontal .card {
  height: 65px;
}
.orderer.height-normal.layout-vertical .card {
  padding: 5px;
}
.orderer.height-auto .card {
  padding: 0;
}
.orderer.height-auto.layout-horizontal .drag-hint {
  min-height: 65px;
  min-width: 22px;
}
.orderer.layout-horizontal .bank {
  padding: 0;
  margin: 0px 13px;
}
.orderer div.paragraph {
  margin: 0;
}
.orderer .card-wrap {
  position: relative;
  z-index: 3;
  width: auto;
}
.orderer.layout-horizontal .card-wrap {
  float: left;
}
.orderer.layout-horizontal .card-wrap:not(:first-child) {
  margin-left: 8px;
}
.orderer.layout-vertical .card-wrap {
  float: none;
  text-align: center;
}
.orderer.layout-vertical .card-wrap:not(:first-child) {
  margin-top: 8px;
}
.orderer.layout-vertical .bank,
.orderer.layout-vertical .draggable-box {
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  float: left;
  max-width: 50%;
}
.orderer.layout-vertical .bank {
  padding: 11px 20px 11px 0;
  margin: 0;
}
.orderer.layout-vertical .draggable-box {
  margin-top: 0;
  padding: 10px;
  min-height: 170px;
}
.orderer.layout-vertical .draggable-box .drag-hint {
  box-sizing: border-box;
  min-width: 140px;
  min-height: 34px;
}
.orderer.layout-vertical .draggable-box .placeholder {
  box-sizing: border-box;
}
.perseus-widget-passage-container .perseus-widget-passage {
  line-height: 22px;
  margin: 22px;
  position: relative;
}
.perseus-widget-passage-container .perseus-widget-passage div.paragraph {
  font-family: KaTeX_Main, Times, "Times New Roman", serif;
}
.perseus-widget-passage-container .katex {
  line-height: 20px;
}
.perseus-widget-passage-container .passage-title div.paragraph {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 10px;
}
.perseus-widget-passage-container .passage-text div.paragraph {
  font-size: 17px;
  line-height: 22px;
  margin: 0;
  text-indent: 20px;
}
.perseus-widget-passage-container .passage-text div.paragraph span {
  text-indent: 0;
}
.perseus-widget-passage-container .footnotes {
  margin-top: 22px;
}
.perseus-widget-passage-container .footnotes div.paragraph {
  font-size: 14px;
  margin: 0;
}
.perseus-widget-passage-container .perseus-highlight {
  background-color: #FFFABE;
}
.perseus-widget-passage-container .perseus-review-highlight {
  background-color: #EEE7B2;
}
.perseus-widget-passage-container .perseus-passage-square-label,
.perseus-widget-passage-container .perseus-passage-circle-label,
.perseus-widget-passage-container .perseus-passage-bracket-label {
  font-family: Times, "Times New Roman", serif;
  font-size: 17px;
}
.perseus-widget-passage-container .line-numbers {
  font-size: 12px;
  font-style: italic;
  font-weight: 600;
  position: absolute;
  text-align: right;
  max-height: 100%;
  overflow: hidden;
  padding-right: 12px;
  left: -52px;
  width: 37px;
}
.perseus-widget-passage-container .line-numbers span {
  display: block;
  line-height: 22px;
  position: relative;
  top: 2px;
  visibility: hidden;
}
.perseus-widget-passage-container .line-numbers span:nth-of-type(5n),
.perseus-widget-passage-container .line-numbers .line-marker {
  visibility: visible;
}
.perseus-widget-passage-editor .perseus-single-editor {
  font-family: Times, "Times New Roman", serif;
  margin-left: -11px;
}
.perseus-widget-passage-editor .perseus-textarea-pair textarea {
  font-size: 13px;
  line-height: 17px;
}
body.sat-section .perseus-widget-passage {
  margin-top: 0;
}
.perseus-widget-plotter svg,
.perseus-widget-plotter vml {
  position: absolute;
}
.perseus-widget-plotter span.rotate {
  -moz-transform: rotate(-90deg);
  -o-transform: rotate(-90deg);
  -webkit-transform: rotate(-90deg);
  transform: rotate(-90deg);
  -ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=3)";
}
.set-from-scale-box {
  border: 2px solid #EEEEEE;
  border-radius: 3px;
  padding: 3px;
}
.categories-title {
  font-size: 14px;
}
.perseus-mobile .perseus-widget-plotter {
  border: solid 0.5px #babec2;
  border-radius: 4px;
}
.perseus-mobile .perseus-widget-plotter .graphie-label .katex {
  color: #626569;
}
.perseus-widget-radio.perseus-rendered-radio div,
.perseus-widget-radio.perseus-rendered-radio div > p {
  /* TODO(alpert): Find a better way of doing inline renderers */
  display: inline;
}
.perseus-widget-radio.perseus-rendered-radio .perseus-radio-rationale-content > .perseus-renderer > .paragraph {
  display: table;
  margin: 0;
}
.perseus-widget-radio.perseus-rendered-radio .perseus-radio-rationale-content > .perseus-renderer > .paragraph:not(:last-child) {
  margin-bottom: 8px;
}
.perseus-widget-radio .unresponsive-svg-image div,
.perseus-widget-radio .svg-image div {
  display: block;
}
.perseus-widget-radio li div.instructions {
  margin-bottom: 5px;
}
.perseus-widget-radio li .value {
  display: block;
  margin-left: 18px;
  min-height: 22px;
}
.perseus-widget-radio li img,
.perseus-widget-radio li table {
  display: inline-block;
  vertical-align: middle;
}
.perseus-widget-radio li table {
  border: 1px solid #ccc;
}
.reaction {
  display: table-row;
}
.reaction-aligned {
  display: table-cell;
  vertical-align: middle;
}
.molecule-container {
  display: table-cell;
  vertical-align: middle;
  margin: 20px;
}
.molecule-canvas {
  display: table-cell;
  vertical-align: middle;
}
.arrow-container {
  display: table-cell;
  vertical-align: middle;
}
.above-text {
  font-size: 0.8em;
  margin-bottom: -1em;
  min-height: 1.8em;
  text-align: center;
}
.below-text {
  font-size: 0.8em;
  margin-top: -1.6em;
  min-height: 1.8em;
  text-align: center;
}
.framework-perseus .perseus-sequence {
  width: 100%;
}
.draggy-boxy-thing .draggable-box,
.draggy-boxy-thing .cards-area {
  background: #eee;
  border: 1px solid #ccc;
  border-bottom: 1px solid #aaa;
  box-shadow: 0 1px 2px #ccc;
  -moz-box-shadow: 0 1px 2px #ccc;
  -webkit-box-shadow: 0 1px 2px #ccc;
}
.draggy-boxy-thing .cards-area {
  position: relative;
  z-index: 2;
}
.draggy-boxy-thing .card {
  position: relative;
  z-index: 3;
  background-color: #fff;
  border: 1px solid #b9b9b9;
  border-bottom-color: #939393;
  border-radius: 4px;
  -moz-border-radius: 4px;
  -webkit-border-radius: 4px;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -o-user-select: none;
  cursor: pointer;
  touch-action: none;
}
.draggy-boxy-thing .card.placeholder {
  background: #ddd;
  border: 1px solid #ccc;
}
.draggy-boxy-thing .card.drag-hint {
  background: none;
  border: 1px dashed #aaa;
  cursor: auto;
}
.draggy-boxy-thing .card.drag-hint:hover {
  border-color: #aaa;
  box-shadow: none;
}
.draggy-boxy-thing .card.dragging {
  background-color: #ffedcd;
  opacity: 0.8;
  filter: opacity(0.8);
}
.draggy-boxy-thing .card.stack {
  z-index: auto;
}
.draggy-boxy-thing .card.stack:after {
  content: " ";
  background-color: #fff;
  border: 1px solid #b9b9b9;
  border-bottom-color: #939393;
  border-radius: 4px;
  -moz-border-radius: 4px;
  -webkit-border-radius: 4px;
  height: 100%;
  width: 100%;
  z-index: -1;
  top: 1px;
  left: 1px;
  position: absolute;
}
.draggy-boxy-thing .card:hover {
  border-color: #ffa500;
  box-shadow: 0 0 4px #c78100;
  -moz-box-shadow: 0 0 4px #c78100;
  -ms-box-shadow: 0 0 4px #c78100;
  -o-box-shadow: 0 0 4px #c78100;
  -webkit-box-shadow: 0 0 4px #c78100;
}
.perseus-sortable div.paragraph {
  margin: 0;
}
.perseus-sortable .perseus-sortable-draggable:before {
  content: "";
  display: inline-block;
  height: 100%;
  vertical-align: middle;
}
.perseus-sortable .perseus-sortable-draggable > div {
  display: inline-block;
  font-size: 14px;
  max-width: 100%;
  vertical-align: middle;
}
.perseus-sortable .perseus-sortable-draggable-unpadded img {
  vertical-align: bottom;
}
.framework-perseus table.perseus-widget-table-of-values.non-markdown {
  text-align: left;
  margin: 20px auto;
  border-collapse: collapse;
}
.framework-perseus table.perseus-widget-table-of-values.non-markdown tr {
  height: 23px;
}
.framework-perseus table.perseus-widget-table-of-values.non-markdown th,
.framework-perseus table.perseus-widget-table-of-values.non-markdown td {
  border: 2px solid black;
  border-width: 0 2px;
}
.framework-perseus table.perseus-widget-table-of-values.non-markdown th:first-child,
.framework-perseus table.perseus-widget-table-of-values.non-markdown td:first-child {
  border-left: 0;
}
.framework-perseus table.perseus-widget-table-of-values.non-markdown th:last-child,
.framework-perseus table.perseus-widget-table-of-values.non-markdown td:last-child {
  border-right: 0;
}
.framework-perseus table.perseus-widget-table-of-values.non-markdown th {
  font-weight: normal;
  padding: 5px;
  width: 80px;
  text-align: left;
  border-bottom: 2px solid black;
}
.framework-perseus table.perseus-widget-table-of-values.non-markdown th .paragraph {
  margin: 0;
}
.framework-perseus table.perseus-widget-table-of-values.non-markdown td {
  padding: 0px 5px;
}
.framework-perseus table.perseus-widget-table-of-values.non-markdown tbody tr:first-child td {
  padding-top: 5px;
}
.framework-perseus table.perseus-widget-table-of-values input,
#answer_area table.perseus-widget-table-of-values input {
  width: 80px;
}
body.mobile .framework-perseus table.perseus-widget-table-of-values.non-markdown td {
  padding: 5px;
}
.perseus-widget-transformer .highlighted-tool-button {
  text-shadow: 1px 1px rgba(0, 0, 0, 0.25);
}
.perseus-widget-transformer > .graphie-container {
  margin-bottom: 10px;
  position: relative;
  overflow: hidden;
}
.perseus-widget-transformer > .graphie-container > img,
.perseus-widget-transformer > .graphie-container > .unresponsive-svg-image {
  position: absolute;
  bottom: 0;
  left: 0;
}
.perseus-widget-transformer .transformer-undo-button {
  float: right;
}
.perseus-widget-transformer .perseus-transformation-list {
  margin-top: 10px;
  margin-bottom: 10px;
}
.perseus-widget-transformer .perseus-transformation-list input {
  width: 40px;
}
.old-unit-input input,
.unit-editor-canonical {
  border: 1px solid #a4a4a4;
  border-radius: 5px;
  font-size: 14px;
  padding: 6px;
}
.unit-editor > div {
  margin: 5px 0;
}
.perseus-widget-container.widget-nohighlight {
  transition: all 0.15s;
}
.perseus-widget-container.widget-highlight {
  -webkit-box-shadow: 0px 0px 0px 2px #ffa500;
  -moz-box-shadow: 0px 0px 0px 2px #ffa500;
  box-shadow: 0px 0px 0px 2px #ffa500;
  transition: all 0.15s;
}
.perseus-widget-container.widget-inline {
  display: inline;
}
.perseus-widget-container.widget-inline-block {
  display: inline-block;
}
.bibliotron-exercise .perseus-hint-renderer {
  border-left: 4px solid #f6f7f7;
  padding-left: 16px;
  position: relative;
}
.bibliotron-exercise .perseus-hint-renderer:focus {
  border-left-color: #d6d8da;
  outline: none;
}
.bibliotron-exercise .perseus-hint-renderer:before,
.bibliotron-exercise .perseus-hint-renderer:after {
  content: "";
  display: table;
  clear: both;
}
.bibliotron-exercise .perseus-hint-renderer div.paragraph {
  margin-top: 0px;
  margin-bottom: 16px;
}
.bibliotron-exercise .perseus-hint-renderer.last-hint {
  margin-bottom: 32px;
}
@media (max-width: 767px) {
  .bibliotron-exercise .perseus-hint-renderer.last-hint {
    margin-bottom: 0;
  }
}
.perseus-hint-label {
  color: #00457c;
  display: none;
  font-weight: 600;
  margin-right: 13px;
  position: absolute;
  right: 100%;
  white-space: nowrap;
}
.perseus-domain-science .perseus-hint-label {
  color: #9e034e;
}
.perseus-domain-math .perseus-hint-label {
  color: #007d96;
}
.perseus-domain-economics .perseus-hint-label {
  color: #a75a05;
}
.perseus-domain-partner .perseus-hint-label {
  color: #208170;
}
.perseus-domain-humanities .perseus-hint-label {
  color: #be2612;
}
.perseus-domain-test-prep .perseus-hint-label {
  color: #543b78;
}
.perseus-domain-cs .perseus-hint-label {
  color: #0d923f;
}
.bibliotron-exercise .perseus-hint-renderer.last-rendered .perseus-hint-label {
  display: block;
}
@media (max-width: 767px) {
  .bibliotron-exercise .perseus-hint-renderer.last-rendered .perseus-hint-label {
    display: none;
  }
}
.perseus-tooltip {
  background: #fff;
  padding: 5px 10px;
  width: 240px;
}
.perseus-formats-tooltip {
  background: #fff;
  padding: 5px 10px;
  width: 240px;
  color: #777;
}
.framework-perseus .perseus-formats-tooltip .paragraph > ul {
  padding: 0;
  margin: -20px 0 -16px 0;
}
.framework-perseus .perseus-formats-tooltip .paragraph > ul > li {
  list-style-type: none;
}
.perseus-math-input.mq-editable-field.mq-math-mode {
  background: #fff;
  font-size: 18px;
  min-width: 100px;
  border-color: #a4a4a4;
  border-radius: 5px;
}
.perseus-math-input.mq-editable-field.mq-math-mode > .mq-root-block {
  padding: 4px;
}
.perseus-math-input.mq-editable-field.mq-math-mode .mq-cursor {
  padding-left: 0;
}
.perseus-math-input.mq-editable-field.mq-math-mode .mq-paren.mq-ghost {
  color: inherit;
}
.perseus-math-input.mq-editable-field.mq-math-mode .mq-paren + span {
  margin: 0;
}
.perseus-math-input.mq-editable-field.mq-math-mode .mq-binary-operator {
  font-family: KaTeX_Main !important;
}
.perseus-math-input.mq-editable-field.mq-math-mode sup {
  line-height: normal;
}
.perseus-widget-editor .perseus-math-input.mq-editable-field.mq-math-mode > .mq-root-block {
  border-radius: 0;
}
.math-input-buttons {
  background-color: rgba(255, 255, 255, 0.7);
  border-radius: 5px;
  border: 1px solid #ddd;
  box-sizing: border-box;
  margin-top: 5px;
  padding: 2px;
  width: 201px;
}
.math-input-buttons.absolute {
  left: -2px;
  position: absolute;
  top: -3px;
  z-index: 5;
}
.tex-button {
  display: block;
  float: left;
  width: 35px;
  height: 35px;
  margin: 2px;
  border: 1px solid #1c758a;
  background-color: white;
  border-radius: 5px;
}
.tex-button:hover {
  cursor: pointer;
  background-color: #f0f0f0;
}
.tex-button:focus {
  border: 2px solid #1c758a;
  outline: none;
}
.tex-button-row {
  margin: 5px 0;
}
.tex-button-row:first-child {
  margin-top: 0;
}
.tex-button-row:last-child {
  margin-bottom: 0;
}
.renderer-widget-error {
  background-color: #fcc;
}
#sat-mission .content-area > div {
  margin-left: auto;
  margin-right: auto;
  width: 592px;
}
#sat-mission .content-area > div .perseus-input-with-label {
  display: flex;
  align-items: center;
}
#sat-mission .content-area > div .perseus-input-with-label .perseus-input-label {
  font-weight: 600;
  padding-right: 10px;
}
#sat-mission .content-area > div .perseus-input-with-answer-blurb > span,
#sat-mission .content-area > div .perseus-input-with-answer-blurb > label {
  display: inline-block;
}
#sat-mission .content-area > div .perseus-input-with-answer-blurb .perseus-possible-answers,
#sat-mission .content-area > div .perseus-input-with-answer-blurb .perseus-possible-answers:before {
  font-family: "Proxima Nova Semibold";
}
#sat-mission .content-area > div .perseus-input-with-answer-blurb .perseus-possible-answers {
  color: #009900;
  display: inline-block;
  padding-right: 4px;
}
#sat-mission .content-area > div .perseus-input-with-answer-blurb .perseus-possible-answers dt,
#sat-mission .content-area > div .perseus-input-with-answer-blurb .perseus-possible-answers dd {
  display: inline-block;
}
#sat-mission .content-area > div .perseus-input-with-answer-blurb .perseus-possible-answers dt {
  padding: 0 5px 0 13px;
  color: #121212;
  text-transform: uppercase;
}
#sat-mission .content-area > div .perseus-input-with-answer-blurb .perseus-possible-answers dt::after {
  content: ":";
}
#sat-mission .content-area > div .perseus-input-with-answer-blurb .perseus-possible-answers dd:not(:last-child)::after {
  content: "or";
  padding: 0 5px;
  color: #121212;
}
#sat-mission .content-area > div input.perseus-incorrect {
  color: #990000;
  background-color: #f2ebeb;
  border: solid 1px #cc5252;
}
#sat-mission .content-area > div input.perseus-correct {
  color: #009900;
  background-color: #e4f7e4;
  border: solid 1px #00cc00;
}
#sat-mission .content-area > div input.perseus-unanswered {
  background-color: #eee;
  border: solid 1px #999;
}
#sat-mission .content-area > div.perseus-renderer-two-columns {
  width: 1024px;
}
#sat-mission .content-area > div.perseus-renderer-two-columns > .paragraph {
  margin: 0;
}
#sat-mission .content-area > div.perseus-renderer-two-columns .perseus-two-columns {
  display: flex;
  justify-content: center;
}
#sat-mission .content-area > div.perseus-renderer-two-columns .perseus-column {
  display: -webkit-flex;
  -webkit-flex-direction: column;
  display: flex;
  flex-direction: column;
  width: 512px;
}
#sat-mission .content-area > div.perseus-renderer-two-columns .perseus-column:nth-child(1) {
  background: #eee;
  border-right: 1px solid #ddd;
  box-sizing: border-box;
}
#sat-mission .content-area > div.perseus-renderer-two-columns .perseus-column:nth-child(1) .perseus-column-content {
  padding-top: 48px;
  padding-bottom: 22px;
  padding-left: 46px;
  padding-right: 32px;
}
#sat-mission .content-area > div.perseus-renderer-two-columns .perseus-column:nth-child(1) .perseus-widget-passage-container {
  position: relative;
}
#sat-mission .content-area > div.perseus-renderer-two-columns .perseus-column:nth-child(1) .perseus-widget-passage-container .perseus-widget-passage-instructions div.paragraph {
  margin-top: 0;
}
#sat-mission .content-area > div.perseus-renderer-two-columns .perseus-column:nth-child(1) .perseus-widget-passage {
  margin: 0;
}
#sat-mission .content-area > div.perseus-renderer-two-columns .perseus-column:nth-child(1) > .paragraph {
  margin-right: 40px;
}
#sat-mission .content-area > div.perseus-renderer-two-columns .perseus-column:nth-child(1) blockquote {
  padding: 0;
  margin-right: 22px;
}
#sat-mission .content-area > div.perseus-renderer-two-columns .perseus-column:nth-child(1) blockquote > .paragraph:nth-child(1) {
  margin-top: 0;
}
#sat-mission .content-area > div.perseus-renderer-two-columns .perseus-column:nth-child(2) .perseus-column-content {
  padding-left: 32px;
  padding-right: 32px;
}
#sat-mission .content-area > div.perseus-renderer-two-columns .perseus-column:nth-child(2) .perseus-group {
  margin-bottom: 20px;
}
#sat-mission .content-area > div.perseus-renderer-two-columns .perseus-column-content {
  flex: 1 1 auto;
  overflow-y: auto;
}
#sat-mission .content-area > div.perseus-renderer-two-columns .perseus-column-content > .paragraph {
  margin-top: 0;
}
#sat-mission input[type=text],
#sat-mission input[type=number] {
  border: 1px solid #aaa;
  font-family: "Proxima Nova Semibold", sans-serif;
  font-size: 14px;
  margin: 10px 0;
  padding: 5px;
}
#sat-mission input[type=text]:focus,
#sat-mission input[type=number]:focus {
  border-color: #0084ce;
  box-shadow: 0 0 10px rgba(0, 132, 206, 0.8);
  outline: none;
}
#sat-mission .valid-answer input[type=text]:valid,
#sat-mission .valid-answer input[type=number]:valid {
  border: 1px solid #0084ce;
  background: #e4f3f9;
  color: initial;
}
#sat-mission .valid-answer input[type=text]:valid:focus,
#sat-mission .valid-answer input[type=number]:valid:focus {
  box-shadow: 0 0 10px rgba(0, 132, 206, 0.8);
}
#sat-mission .valid-answer .perseus-group-valid-answer input[type=text]:valid,
#sat-mission .valid-answer .perseus-group-valid-answer input[type=number]:valid {
  border: 1px solid #0084ce;
  background: #e4f3f9;
  color: initial;
}
#sat-mission .valid-answer .perseus-group-valid-answer input[type=text]:valid:focus,
#sat-mission .valid-answer .perseus-group-valid-answer input[type=number]:valid:focus {
  box-shadow: 0 0 10px rgba(0, 132, 206, 0.8);
}
#sat-mission .valid-answer .perseus-group-invalid-answer input[type=text]:valid,
#sat-mission .valid-answer .perseus-group-invalid-answer input[type=number]:valid {
  color: #990000;
  background-color: #f2ebeb;
  border: solid 1px #cc5252;
}
#sat-mission .valid-answer .perseus-group-invalid-answer input[type=text]:valid:focus,
#sat-mission .valid-answer .perseus-group-invalid-answer input[type=number]:valid:focus {
  box-shadow: 0 0 10px rgba(204, 82, 82, 0.8);
}
#sat-mission .invalid-answer input[type=text]:valid,
#sat-mission .invalid-answer input[type=number]:valid {
  color: #990000;
  background-color: #f2ebeb;
  border: solid 1px #cc5252;
}
#sat-mission .invalid-answer input[type=text]:valid:focus,
#sat-mission .invalid-answer input[type=number]:valid:focus {
  box-shadow: 0 0 10px rgba(204, 82, 82, 0.8);
}
#sat-mission .invalid-answer .perseus-group-valid-answer input[type=text]:valid,
#sat-mission .invalid-answer .perseus-group-valid-answer input[type=number]:valid {
  border: 1px solid #0084ce;
  background: #e4f3f9;
  color: initial;
}
#sat-mission .invalid-answer .perseus-group-valid-answer input[type=text]:valid:focus,
#sat-mission .invalid-answer .perseus-group-valid-answer input[type=number]:valid:focus {
  box-shadow: 0 0 10px rgba(0, 132, 206, 0.8);
}
#sat-mission .invalid-answer .perseus-group-invalid-answer input[type=text]:valid,
#sat-mission .invalid-answer .perseus-group-invalid-answer input[type=number]:valid {
  color: #990000;
  background-color: #f2ebeb;
  border: solid 1px #cc5252;
}
#sat-mission .invalid-answer .perseus-group-invalid-answer input[type=text]:valid:focus,
#sat-mission .invalid-answer .perseus-group-invalid-answer input[type=number]:valid:focus {
  box-shadow: 0 0 10px rgba(204, 82, 82, 0.8);
}
#sat-mission #sat-route-task .content-area > .perseus-renderer-two-columns,
#sat-mission #sat-route-section .content-area > .perseus-renderer-two-columns {
  margin-top: 0;
}
#sat-mission #sat-route-task .content-area > .perseus-renderer-two-columns .perseus-column:nth-child(2) > .perseus-column-content > :first-child,
#sat-mission #sat-route-section .content-area > .perseus-renderer-two-columns .perseus-column:nth-child(2) > .perseus-column-content > :first-child {
  margin-top: 48px;
}
.perseus-error {
  background: #ffbaba;
  border: 2px solid red;
  border-radius: 5px;
  padding: 20px;
  margin: 15px 0 10px;
}
@media (max-width: 767px) {
  .perseus-renderer-responsive {
    margin: 0 16px;
  }
  .perseus-renderer-responsive .perseus-renderer-responsive {
    margin: 0;
  }
}
@media (max-width: 767px) {
  .perseus-mobile .perseus-block-math {
    font-size: 18px;
  }
}
/* math-input CSS */