The Backrooms

:root {
    --lh-red: #c0392b;
    --lh-blue: #2980b9;
    --lh-green: #27ae60;
    --lh-dark-green: #16a085;
    --lh-purple: #8e44ad;
    --lh-orange: #e67e22;
    --lh-yellow: #f1c40f;
 
    --lh-paper-bg: 255, 251, 240;
    --lh-string-color: 192, 57, 43;
    --lh-book-color: var(--gray-monochrome);
    --lh-tape-color: 90,90,90,0.3;
    --lh-white-bg: 249,249,249;
    --lh-dark-bg: 50, 50, 50;
    --lh-highlighter: var(--bright-accent);
    --lh-border-color: var(--gray-monochrome);
    --lh-wiki-note-color: var(--bright-accent)
}
 
/**
 *  旧代码合集
 *  为了向下兼容而保留
 */
 
.grid-container{display:flex;flex-direction:row;flex-wrap:wrap;width:100%}.grid-container,.grid-container [class*=grid]{box-sizing:border-box}[class*=grid]{padding:5px}.grid{width:100%}.grid-large{width:75%}.grid-big{width:50%}.grid-medium{width:33.33%}.grid-small{width:25%}@media screen and (min-width:768px){.wd-grid-large{width:75%}.wd-grid,.wd-grid-big{width:50%}.wd-grid-medium{width:33.33%}.wd-grid-small{width:25%}}.text-hover-hide{opacity:0;transition:opacity .3s}.text-hover-hide:hover{opacity:1}.text-block-hide{background:rgb(var(--black-monochrome));color:rgb(var(--black-monochrome));transition:background .3s}.text-block-hide:hover{background:0 0}.text-blur-hide,.text-blur-hover-hide{filter:blur(.3rem);-webkit-filter:blur(.3rem) transition: blur .3s}.text-blur-hover-hide:hover{filter:blur(0);-webkit-filter:blur(0)}.lyric-box{text-align:center;font-size:1.05rem;display:flex;flex-direction:column;flex-wrap:wrap;justify-content:center}.lyric-box p{margin:1.5em auto}.lyric-box.with-bigger-line p{margin:3em auto}
 
/**
 *  便签纸
 *  notepaper
 */
 
.notepaper {
    background: linear-gradient(rgb(var(--lh-paper-bg)) 95%, #ddd 0);
    line-height: 2em;
    background-size: 100% 2em;
    background-attachment: local;
    border: 2em solid rgb(var(--lh-paper-bg));
    box-shadow: 0 0.1rem 0.3rem rgba(0,0,0,0.2);
    padding: 0;
    margin: 1em auto;
    box-sizing: border-box;
    position: relative
}
.notepaper p {
    margin: 0;
    font-size: 1.05rem;
    letter-spacing: 0.1rem;
    line-height: inherit
}
.notepaper.narrow,
.notepaper.wide {
        width: 90%
}
@media screen and (min-width:768px){
    .notepaper.narrow {
        width: 50%
    }
    .notepaper.wide {
        width: 75%
    }
}
 
.notepaper.tight {
    border-width: 1rem;
    border-left-width: 1.2rem;
    border-right-width: 1.2rem;
    line-height: 1.8em;
    background-size: 100% 1.8em;
    font-size: 13px
}
 
.notepaper.with-string::before {
    content: '';
    width: 0.5em;
    height: 6rem;
    background: rgb(var(--lh-string-color));
    top: -2rem; right: -1rem;
    display: block;
    position: absolute;
    box-shadow: 0 0.1em 0.2em rgba(0,0,0,0.2);
    clip-path: polygon(-100% -100%,100% 0%,100% 100%,50% 98%,0% 100%);
}
.notepaper.with-tape::before {
    content: '';
    border: 1px solid #ddd;
    background: rgba(var(--lh-tape-color));
    width: 1.5em;
    height: 4em;
    transform: rotate(45deg);
    display: block;
    position: absolute;
    top: -3em;
    left: -1.8em
}
 
.notepaper.tight.with-string::before {
    top: -1rem; 
    right: -0.25rem;
}
.notepaper.tight.with-tape::before {
    top: -2.5em;
    left: -1.3em
}
 
.notepaper.page {
    min-height: 36em;
    counter-increment: page;
    display: flex;
    flex-direction: column;
    justify-content: space-between
}
@media screen and (min-width:768px){
    .notepaper.page {
        width: 70%
    }
}
.notepaper.page:after {
    content: counter(page);
    display: block;
    text-align: center
}
.notepaper-group {
    counter-reset: page;
}
 
.book-pattern {
    display: flex;
    flex-wrap: wrap;
    flex-direction: row
}
.book-pattern .notepaper.page:not(.notepaper > .notepaper) {
    width: 100%
}
@media screen and (min-width: 768px) {
    .book-pattern .notepaper.page:not(.notepaper > .notepaper) {
        width: 50%
    }
}
 
.book-wrapper {
    background: rgb(var(--lh-book-color));
    padding: 0.5rem;
    box-shadow: 0 0.1rem 0.2rem rgba(0,0,0,0.2);
    border-radius: 5px;
    margin: 1rem auto
}
@media screen and (min-width: 768px) {
    .book-wrapper .notepaper {
        margin: 0
    }
}
 
/**
 *  文字修饰
 */
 
.text-highlighted {
    position: relative
}
.text-highlighted::before {
    content: "";
    position: absolute;
    height: 0.9em;
    bottom: 2px;
    left: -2px;
    width: 105%;
    z-index: -1;
    background-color: rgb(var(--lh-highlighter));
    opacity: .6;
    transform: skew(-15deg);
    transition: opacity .2s ease;
    border-radius: 3px 8px 10px 6px;
    transition: 0.1s ease background-color;
}
 
.text-underlined {
    text-decoration: underline;
    text-underline-offset: 4px;
    text-decoration-thickness: 2px;
    text-decoration-color: rgb(var(--lh-highlighter))
}
.text-wavy {
    text-decoration: underline wavy;
    text-underline-offset: 4px;
    text-decoration-color: rgb(var(--lh-highlighter))
}
 
.text-circled,
.text-squared {
    display: inline-block;
    border: 2px solid rgb(var(--lh-highlighter));
    border-radius: 100%;
    box-sizing: border-box
}
.text-squared { border-radius: 0 }
 
.text-shadow { text-shadow: 0.075em 0.075em 0 rgb(var(--lh-highlighter)) }
 
.text-highlighted.td-red::before { background: var(--lh-red) }
.text-circled.td-red, .text-squared.td-red { border-color: var(--lh-red) }
.text-underlined.td-red, .text-wavy.td-red { text-decoration-color: var(--lh-red) }
 
.text-highlighted.td-blue::before { background: var(--lh-blue) }
.text-circled.td-blue, .text-squared.td-blue { border-color: var(--lh-blue) }
.text-underlined.td-blue, .text-wavy.td-blue { text-decoration-color: var(--lh-blue) }
 
.text-highlighted.td-green::before { background: var(--lh-green) }
.text-circled.td-green, .text-squared.td-green { border-color: var(--lh-green) }
.text-underlined.td-green, .text-wavy.td-green { text-decoration-color: var(--lh-green) }
 
.text-highlighted.td-darkgreen::before { background: var(--lh-dark-green) }
.text-circled.td-darkgreen, .text-squared.td-darkgreen { border-color: var(--lh-dark-green) }
.text-underlined.td-darkgreen, .text-wavy.td-darkgreen { text-decoration-color: var(--lh-dark-green) }
 
.text-highlighted.td-purple::before { background: var(--lh-purple) }
.text-circled.td-purple, .text-squared.td-purple { border-color: var(--lh-purple) }
.text-underlined.td-purple, .text-wavy.td-purple { text-decoration-color: var(--lh-purple) }
 
.text-highlighted.td-yellow::before { background: var(--lh-yellow) }
.text-circled.td-yellow, .text-squared.td-yellow { border-color: var(--lh-yellow) }
.text-underlined.td-yellow, .text-wavy.td-yellow { text-decoration-color: var(--lh-yellow) }
 
.text-highlighted.td-orange::before { background: var(--lh-orange) }
.text-circled.td-orange, .text-squared.td-orange { border-color: var(--lh-orange) }
.text-underlined.td-orange, .text-wavy.td-orange { text-decoration-color: var(--lh-orange) }
 
/* 隐藏文字 */
 
.text-blank { color: rgba(0,0,0,0) }
.text-block { 
    background: rgb(var(--black-monochrome));
    color: rgb(var(--black-monochrome)); 
}
.text-blur { 
    filter: blur(0.3em);
    -webkit-filter: blur(0.3em)
}
 
.text-hoverback,
.text-selectback {
    transition-duration: 0.3s;
    transition-property: background, transform, color
}
 
.text-blank.text-hoverback:hover,
.text-blank.text-selectback::selection,
.text-blank.text-selectback *::selection { color: rgb(var(--black-monochrome)) }
 
.text-block.text-hoverback:hover { background: transparent!important }
.text-block.text-selectback::selection,
.text-block.text-selectback *::selection { color: rgb(var(--white-monochrome, 255, 255, 255)) }
 
.text-blur.text-hoverback:hover { filter: blur(0)!important; -webkit-filter: blur(0)!important }
 
/**
 * 附加项
 */
.with-border, .with-box-style { border: 1px solid rgb(var(--bright-accent)) }
.with-border-dark { border: 1px solid rgb(var(--black-monochrome)) }
.with-border-light { border: 1px solid rgb(var(--white-monochrome)) }
.with-border-thick { border-width: 2px }
 
.with-shadow-sm { box-shadow: 0 0 0.1em rgba(0,0,0,0.2) }
.with-shadow { box-shadow: 0 0.1em 0.2em rgba(0,0,0,0.2) }
.with-shadow-lg { box-shadow: 0 0.15em 0.3em rgba(0,0,0,0.2) }
.with-shadow-xl { box-shadow: 0 0.2em 0.5em rgba(0,0,0,0.2) }
.with-shadow-xxl { box-shadow: 0 0.25em 0.8em rgba(0,0,0,0.2) }
 
.with-padding, .with-box-style { padding: 0.25em 1em }
.with-p-sm { padding: 0.125em 0.5em }
.with-p-lg { padding: 0.5em 2em }
 
.with-margin, .with-box-style { margin: 1em auto }
.with-m-sm { margin: 0.5em auto }
.with-m-lg { margin: 2em auto }
 
.with-narrow-width { 
    width: 90%!important; 
    margin-left: auto; 
    margin-right: auto 
}
@media screen and (min-width: 768px) {
    .with-narrow-width { width: 75%!important }
}
[class*="with-bg-"], [class*="with-bg-"] h1 { color: #fff!important }
.with-bg-red { background: var(--lh-red)!important }
.with-bg-blue { background: var(--lh-blue)!important }
.with-bg-green { background: var(--lh-green)!important }
.with-bg-darkgreen { background: var(--lh-dark-green)!important }
.with-bg-yellow { background: var(--lh-yellow)!important }
.with-bg-orange { background: var(--lh-orange)!important }
.with-bg-purple { background: var(--lh-purple)!important }
 
/**
 * 删除类
 */
 
.offwith-shadow { box-shadow: none!important }
.offwith-border { border: none!important }
.offwith-padding, .offwith-pam { padding: 0!important }
.offwith-margin, .offwith-pam { margin: 0!important }
 
.offwith-width-limit {
    width: auto!important;
    margin-left: auto!important;
    margin-right: auto!important
}
 
div[class*="grider"].offwith-grid-gap { grid-gap: 0!important }
 
/**
 * 网格布局
 */
 
/* Gridder 容器 */
 
div[class*="gridder"] {
    display: grid;
    box-sizing: border-box;
    grid-gap: 1rem;
    padding: 0
}
div[class*="gridder"] * { box-sizing: border-box }
 
.gridder, .gridder-col-2 {
    grid-template-columns: 1fr 1fr;
}
.gridder-col-3 {
    grid-template-columns: repeat(3, 1fr);
}
.gridder-col-4 {
    grid-template-columns: repeat(4, 1fr);
}
 
@media screen and (min-width: 768px) {
    .pc-gridder, .pc-gridder-col-2 {
       grid-template-columns: 1fr 1fr;
   }
   .pc-gridder-col-3 {
       grid-template-columns: repeat(3, 1fr);
   }
   .pc-gridder-col-4 {
       grid-template-columns: repeat(4, 1fr);
   }
}
 
.spanner, .spanner-2 {
    grid-column-start: span 2;
}
.spanner-3 {
    grid-column-start: span 3;
}
 
/**
 * 告示组件
 */
.signblock,
.signblock-dark,
.signblock-warn {
    margin: 1rem auto;
    box-shadow: 0 0.1rem 0.3rem rgba(0,0,0,0.4);
    background: rgb(var(--lh-white-bg));
    font-size: 1.05rem;
    padding: 2rem
}
@media screen and (min-width: 768px) {
    .signblock,
    .signblock-dark,
    .signblock-warn {
        width: 75%
    }
}
.signblock-dark, 
.signblock-dark h1 {
    background: rgb(var(--lh-dark-bg));
    color: #fff
}
.signblock-warn, 
.signblock-warn h1 {
    background: var(--lh-red);
    color: #fff
}
 
.signblock h1,
.signblock-dark h1,
.signblock-warn h1 {
    text-align: center;
    font-size: 2rem;
    margin: 0;
    font-weight: 700
}
.signblock-img {
    display: flex;
    flex-direction: row;
    justify-content: center
}
.signblock-img img {
    width: 8em
}
.signblock-footer {
    font-size: 0.9em;
    text-align: center;
    margin: 0.5rem 0;
    font-weight: bolder;
    display: block
}
 
/**
 * 报告
 */
 
.reportblock,
.reportblock-dark {
    border: 2px solid rgb(var(--lh-border-color));
    box-shadow: 0 0.1rem 0.2rem rgba(0,0,0,0.3);
    background: rgb(var(--white-monochrome));
    padding: 0.8rem 1.5rem;
    padding-bottom: 0.4rem;
    margin: 1.5rem auto;
    margin-bottom: 1rem;
    position: relative
}
 
.reportblock hr,
.reportblock-dark hr {
    background-color: rgb(var(--lh-border-color));
    margin-left: -1.5rem;
    margin-right: -1.5rem
}
 
.reportblock h1:first-child,
.reportblock-dark h1:first-child {
    position: absolute;
    top: -1rem;
    left: 1.5rem;
    font-size: 110%;
    font-weight: 600;
    background: rgb(var(--lh-border-color));
    color: #fff;
    padding: 0.2rem 0.5rem;
    margin: 0;
}
 
.reportblock-dark,
.reportblock-dark h1 {
    border-color: rgb(var(--lh-white-bg));
    background: rgb(var(--lh-dark-bg));
    color: #fff
}
 
.reportblock-dark hr {
    background-color: rgb(var(--lh-white-bg));
}
 
/* 更好的折叠框 */
 
.bettercollap {
  margin: 1em 0;
}
 
.bettercollap .collapsible-block {
  width: auto;
  overflow: hidden;
  border: 1px solid rgb(var(--lh-border-color))
}
 
.bettercollap .collapsible-block-content,
.bettercollap .collapsible-block-link {
  background: rgb(var(--white-monochrome));
  padding: 0.5em
}
 
.bettercollap .collapsible-block-content {
  padding-left: 1em;
  padding-right: 1em
}
 
.bettercollap .collapsible-block-link {
  color: rgb(var(--lh-border-color));
  background: rgb(var(--white-monochrome));
  transition: .3s;
  display: block;
}
.bettercollap .collapsible-block-link:hover,
.bettercollap .collapsible-block-unfolded .collapsible-block-link,
.styledcollap.bettercollap .collapsible-block-link {
  color: rgb(var(--white-monochrome));
  background: rgb(var(--lh-border-color))!important;
  text-decoration: none
}
 
.bettercollap .collapsible-block-link:hover a { color: rgb(var(--white-monochrome)) }
 
.bettercollap .collapsible-block-link::before {
  content: "\25BC";
  display: inline-block;
  margin-right: 0.5em;
  transform: rotate(-90deg) scale(0.9)
}
.bettercollap .collapsible-block-unfolded .collapsible-block-link::before {
   transform: rotate(0) scale(0.9)
}
 
.bettercollap .collapsible-block + .collapsible-block { border-top: none }
 
.styledcollap.bettercollap .collapsible-block {
  border-radius: 2px;
  box-shadow: 0 0.1rem 0.2rem rgba(0,0,0,0.3)
}
 
.styledcollap.bettercollap .collapsible-block-content {
  background-color: rgb(var(--pale-gray-monochrome));
  border-width: 3px
}
 
.styledcollap.bettercollap .collapsible-block-link:hover {
  background: rgba(var(--lh-border-color),0.95)!important;
}
 
/**
 * 提示框
 */
 
.infoblock {
    color: #f1f1f1;
    font-weight: bold;
    background: #424242;
    padding: 5px 5px 5px 5px;
    border-radius: 4px;
    margin: -0.5rem 0 1rem 0;
    display: block;
    width: fit-content;
    padding-right: 25px;
}
 
.infoblock::before {
    content: "ⓘ "
}
 
/**
 * 单页迭代 
 */
 
.offset-page:not(:target), .offset-page:target ~ div#u-default-page { display: none }
.offset-page:target { display: block }