@charset "UTF-8";
/**
 * Reset some basic elements
 */
body, h1, h2, h3, h4, h5, h6,
p, blockquote, pre, hr,
dl, dd, ol, ul, figure {
  margin: 0;
  padding: 0;
}

/**
 * Basic styling
 */
body {
  font: 400 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  color: #111;
  background-color: #fdfdfd;
  -webkit-text-size-adjust: 100%;
  -webkit-font-feature-settings: "kern" 1;
  -moz-font-feature-settings: "kern" 1;
  -o-font-feature-settings: "kern" 1;
  font-feature-settings: "kern" 1;
  font-kerning: normal;
  display: flex;
  min-height: 100vh;
  flex-direction: column;
}

/**
 * Set `margin-bottom` to maintain vertical rhythm
 */
h1, h2, h3, h4, h5, h6,
p, blockquote, pre,
ul, ol, dl, figure,
.highlight {
  margin-bottom: 15px;
}

/**
 * `main` element
 */
main {
  display: block; /* Default value of `display` of `main` element is 'inline' in IE 11. */
}

/**
 * Images
 */
img {
  max-width: 100%;
  vertical-align: middle;
}

/**
 * Figures
 */
figure > img {
  display: block;
}

figcaption {
  font-size: 14px;
}

/**
 * Lists
 */
ul, ol {
  margin-left: 30px;
}

li > ul,
li > ol {
  margin-bottom: 0;
}

/**
 * Headings
 */
h1, h2, h3, h4, h5, h6 {
  font-weight: 400;
}

/**
 * Links
 */
a {
  color: #2a7ae2;
  text-decoration: none;
}
a:visited {
  color: rgb(22.9483471074, 86.2541322314, 168.5516528926);
}
a:hover {
  color: #111;
  text-decoration: underline;
}
.social-media-list a:hover {
  text-decoration: none;
}
.social-media-list a:hover .username {
  text-decoration: underline;
}

/**
 * Blockquotes
 */
blockquote {
  color: #828282;
  border-left: 4px solid #e8e8e8;
  padding-left: 15px;
  font-size: 18px;
  letter-spacing: -1px;
  font-style: italic;
}
blockquote > :last-child {
  margin-bottom: 0;
}

/**
 * Code formatting
 */
pre,
code {
  font-size: 15px;
  border: 1px solid #e8e8e8;
  border-radius: 3px;
  background-color: #eef;
}

code {
  padding: 1px 5px;
}

pre {
  padding: 8px 12px;
  overflow-x: auto;
}
pre > code {
  border: 0;
  padding-right: 0;
  padding-left: 0;
}

/**
 * Wrapper
 */
.wrapper {
  max-width: -webkit-calc(800px - (30px * 2));
  max-width: calc(800px - 30px * 2);
  margin-right: auto;
  margin-left: auto;
  padding-right: 30px;
  padding-left: 30px;
}
@media screen and (max-width: 800px) {
  .wrapper {
    max-width: -webkit-calc(800px - (30px));
    max-width: calc(800px - (30px));
    padding-right: 15px;
    padding-left: 15px;
  }
}

/**
 * Clearfix
 */
.footer-col-wrapper:after, .wrapper:after {
  content: "";
  display: table;
  clear: both;
}

/**
 * Icons
 */
.svg-icon {
  width: 16px;
  height: 16px;
  display: inline-block;
  fill: #828282;
  padding-right: 5px;
  vertical-align: text-top;
}

.social-media-list li + li {
  padding-top: 5px;
}

/**
 * Tables
 */
table {
  margin-bottom: 30px;
  width: 100%;
  text-align: left;
  color: rgb(62.9, 62.9, 62.9);
  border-collapse: collapse;
  border: 1px solid #e8e8e8;
}
table tr:nth-child(even) {
  background-color: rgb(247.3, 247.3, 247.3);
}
table th, table td {
  padding: 9.999999999px 15px;
}
table th {
  background-color: rgb(239.65, 239.65, 239.65);
  border: 1px solid rgb(221.8, 221.8, 221.8);
  border-bottom-color: rgb(201.4, 201.4, 201.4);
}
table td {
  border: 1px solid #e8e8e8;
}

/**
 * Site header
 */
.site-header {
  border-top: 5px solid rgb(66.25, 66.25, 66.25);
  border-bottom: 1px solid #e8e8e8;
  min-height: 55.95px;
  position: relative;
}

.site-title {
  font-size: 26px;
  font-weight: 300;
  line-height: 54px;
  letter-spacing: -1px;
  margin-bottom: 0;
  float: left;
}
.site-title, .site-title:visited {
  color: rgb(66.25, 66.25, 66.25);
}

.site-nav {
  float: right;
  line-height: 54px;
}
.site-nav .nav-trigger {
  display: none;
}
.site-nav .menu-icon {
  display: none;
}
.site-nav .page-link {
  color: #111;
  line-height: 1.5;
}
.site-nav .page-link:not(:last-child) {
  margin-right: 20px;
}
@media screen and (max-width: 600px) {
  .site-nav {
    position: absolute;
    top: 9px;
    right: 15px;
    background-color: #fdfdfd;
    border: 1px solid #e8e8e8;
    border-radius: 5px;
    text-align: right;
  }
  .site-nav label[for=nav-trigger] {
    display: block;
    float: right;
    width: 36px;
    height: 36px;
    z-index: 2;
    cursor: pointer;
  }
  .site-nav .menu-icon {
    display: block;
    float: right;
    width: 36px;
    height: 26px;
    line-height: 0;
    padding-top: 10px;
    text-align: center;
  }
  .site-nav .menu-icon > svg {
    fill: rgb(66.25, 66.25, 66.25);
  }
  .site-nav input ~ .trigger {
    clear: both;
    display: none;
  }
  .site-nav input:checked ~ .trigger {
    display: block;
    padding-bottom: 5px;
  }
  .site-nav .page-link {
    display: block;
    margin-left: 20px;
    padding: 5px 10px;
  }
  .site-nav .page-link:not(:last-child) {
    margin-right: 0;
  }
}

/**
 * Site footer
 */
.site-footer {
  border-top: 1px solid #e8e8e8;
  padding: 30px 0;
}

.footer-heading {
  font-size: 18px;
  margin-bottom: 15px;
}

.contact-list,
.social-media-list {
  list-style: none;
  margin-left: 0;
}

.footer-col-wrapper {
  font-size: 15px;
  color: #828282;
  margin-left: -15px;
}

.footer-col {
  float: left;
  margin-bottom: 15px;
  padding-left: 15px;
}

.footer-col-1 {
  width: -webkit-calc(35% - (30px / 2));
  width: calc(35% - 30px / 2);
}

.footer-col-2 {
  width: -webkit-calc(20% - (30px / 2));
  width: calc(20% - 30px / 2);
}

.footer-col-3 {
  width: -webkit-calc(45% - (30px / 2));
  width: calc(45% - 30px / 2);
}

@media screen and (max-width: 800px) {
  .footer-col-1,
  .footer-col-2 {
    width: -webkit-calc(50% - (30px / 2));
    width: calc(50% - 30px / 2);
  }
  .footer-col-3 {
    width: -webkit-calc(100% - (30px / 2));
    width: calc(100% - 30px / 2);
  }
}
@media screen and (max-width: 600px) {
  .footer-col {
    float: none;
    width: -webkit-calc(100% - (30px / 2));
    width: calc(100% - 30px / 2);
  }
}
/**
 * Page content
 */
.page-content {
  padding: 30px 0;
  flex: 1;
}

.page-heading {
  font-size: 32px;
}

.post-list-heading {
  font-size: 28px;
}

.post-list {
  margin-left: 0;
  list-style: none;
}
.post-list > li {
  margin-bottom: 30px;
}

.post-meta {
  font-size: 14px;
  color: #828282;
}

.post-link {
  display: block;
  font-size: 24px;
}

/**
 * Posts
 */
.post-header {
  margin-bottom: 30px;
}

.post-title {
  font-size: 42px;
  letter-spacing: -1px;
  line-height: 1;
}
@media screen and (max-width: 800px) {
  .post-title {
    font-size: 36px;
  }
}

.post-content {
  margin-bottom: 30px;
}
.post-content h2 {
  font-size: 32px;
}
@media screen and (max-width: 800px) {
  .post-content h2 {
    font-size: 28px;
  }
}
.post-content h3 {
  font-size: 26px;
}
@media screen and (max-width: 800px) {
  .post-content h3 {
    font-size: 22px;
  }
}
.post-content h4 {
  font-size: 20px;
}
@media screen and (max-width: 800px) {
  .post-content h4 {
    font-size: 18px;
  }
}

/**
 * Syntax highlighting styles
 */
.highlight {
  background: #fff;
}
.highlighter-rouge .highlight {
  background: #eef;
}
.highlight .c {
  color: #998;
  font-style: italic;
}
.highlight .err {
  color: #a61717;
  background-color: #e3d2d2;
}
.highlight .k {
  font-weight: bold;
}
.highlight .o {
  font-weight: bold;
}
.highlight .cm {
  color: #998;
  font-style: italic;
}
.highlight .cp {
  color: #999;
  font-weight: bold;
}
.highlight .c1 {
  color: #998;
  font-style: italic;
}
.highlight .cs {
  color: #999;
  font-weight: bold;
  font-style: italic;
}
.highlight .gd {
  color: #000;
  background-color: #fdd;
}
.highlight .gd .x {
  color: #000;
  background-color: #faa;
}
.highlight .ge {
  font-style: italic;
}
.highlight .gr {
  color: #a00;
}
.highlight .gh {
  color: #999;
}
.highlight .gi {
  color: #000;
  background-color: #dfd;
}
.highlight .gi .x {
  color: #000;
  background-color: #afa;
}
.highlight .go {
  color: #888;
}
.highlight .gp {
  color: #555;
}
.highlight .gs {
  font-weight: bold;
}
.highlight .gu {
  color: #aaa;
}
.highlight .gt {
  color: #a00;
}
.highlight .kc {
  font-weight: bold;
}
.highlight .kd {
  font-weight: bold;
}
.highlight .kp {
  font-weight: bold;
}
.highlight .kr {
  font-weight: bold;
}
.highlight .kt {
  color: #458;
  font-weight: bold;
}
.highlight .m {
  color: #099;
}
.highlight .s {
  color: #d14;
}
.highlight .na {
  color: #008080;
}
.highlight .nb {
  color: #0086B3;
}
.highlight .nc {
  color: #458;
  font-weight: bold;
}
.highlight .no {
  color: #008080;
}
.highlight .ni {
  color: #800080;
}
.highlight .ne {
  color: #900;
  font-weight: bold;
}
.highlight .nf {
  color: #900;
  font-weight: bold;
}
.highlight .nn {
  color: #555;
}
.highlight .nt {
  color: #000080;
}
.highlight .nv {
  color: #008080;
}
.highlight .ow {
  font-weight: bold;
}
.highlight .w {
  color: #bbb;
}
.highlight .mf {
  color: #099;
}
.highlight .mh {
  color: #099;
}
.highlight .mi {
  color: #099;
}
.highlight .mo {
  color: #099;
}
.highlight .sb {
  color: #d14;
}
.highlight .sc {
  color: #d14;
}
.highlight .sd {
  color: #d14;
}
.highlight .s2 {
  color: #d14;
}
.highlight .se {
  color: #d14;
}
.highlight .sh {
  color: #d14;
}
.highlight .si {
  color: #d14;
}
.highlight .sx {
  color: #d14;
}
.highlight .sr {
  color: #009926;
}
.highlight .s1 {
  color: #d14;
}
.highlight .ss {
  color: #990073;
}
.highlight .bp {
  color: #999;
}
.highlight .vc {
  color: #008080;
}
.highlight .vg {
  color: #008080;
}
.highlight .vi {
  color: #008080;
}
.highlight .il {
  color: #099;
}

:root {
  /* Modern Essential Education Theme */
  --bg-color: #ffffff;
  --sidebar-bg: #f8f9fa;
  --surface-color: #ffffff;
  --text-color: #222222;
  --text-muted: #666666;
  --accent-color: #0066cc;
  --accent-hover: #004499;
  --border-color: #e1e4e8;
  --header-color: #111111;
  --hover-bg: #e8eaed;
  --active-bg: #eef3f8;
  --button-bg: rgba(255, 255, 255, 0.94);
  --button-text: #111111;
  --blockquote-bg: #f9fbfd;
  --overlay-color: rgba(17, 17, 17, 0.35);
  --shadow-color: rgba(0, 0, 0, 0.08);
  --surface-strong: rgba(255, 255, 255, 0.96);
  --surface-soft: rgba(248, 249, 250, 0.94);
  /* Typography */
  --font-headline: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-body: 'Merriweather', 'Georgia', serif;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --content-max-width: 800px;
  --sidebar-width: 300px;
}

html[data-theme=dark] {
  --bg-color: #0f141a;
  --sidebar-bg: #121a22;
  --surface-color: #18212b;
  --text-color: #e8edf2;
  --text-muted: #9fb0bf;
  --accent-color: #7ab8ff;
  --accent-hover: #a6d1ff;
  --border-color: #2a3948;
  --header-color: #f6f8fb;
  --hover-bg: #1e2a36;
  --active-bg: #192b3d;
  --button-bg: rgba(24, 33, 43, 0.94);
  --button-text: #f6f8fb;
  --blockquote-bg: #15202b;
  --overlay-color: rgba(2, 6, 12, 0.62);
  --shadow-color: rgba(0, 0, 0, 0.38);
  --surface-strong: rgba(24, 33, 43, 0.96);
  --surface-soft: rgba(18, 26, 34, 0.94);
}

* {
  box-sizing: border-box;
}

html {
  background-color: var(--bg-color);
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-body);
  line-height: 1.7;
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.2s ease, color 0.2s ease;
}

body.sidebar-open {
  overflow: hidden;
}

/* App Layout */
.app-container {
  display: flex;
  min-height: 100vh;
}

.chrome-button {
  position: fixed;
  top: 1rem;
  z-index: 300;
  border: 1px solid var(--border-color);
  background: var(--button-bg);
  color: var(--button-text);
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: 999px;
  padding: 0.8rem 1rem;
  box-shadow: 0 10px 30px var(--shadow-color);
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  backdrop-filter: blur(14px);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.chrome-button:hover,
.chrome-button:focus-visible {
  transform: translateY(-1px);
}

.chrome-button:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 3px;
}

.nav-toggle {
  left: 1rem;
}

.theme-toggle {
  right: 1rem;
}

.chrome-surface {
  position: fixed;
  right: 1rem;
  z-index: 290;
  border: 1px solid var(--border-color);
  background: var(--surface-strong);
  color: var(--button-text);
  border-radius: 20px;
  box-shadow: 0 10px 30px var(--shadow-color);
  backdrop-filter: blur(14px);
}

.hamburger {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
}

.hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
}

.theme-toggle-glyph {
  font-size: 1rem;
  line-height: 1;
}

.language-switcher {
  display: none;
  top: 4.9rem;
  width: min(16rem, 100vw - 2rem);
  padding: 0.75rem 0.9rem 0.85rem 0.9rem;
}

.control-label {
  display: block;
  margin-bottom: 0.45rem;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1.1px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.language-select {
  width: 100%;
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  color: var(--text-color);
  border-radius: 12px;
  padding: 0.75rem 0.85rem;
  font-family: var(--font-ui);
  font-size: 0.95rem;
}

.install-banner {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 320;
  width: min(26rem, 100vw - 2rem);
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  background: var(--surface-soft);
  box-shadow: 0 14px 36px var(--shadow-color);
  backdrop-filter: blur(18px);
}

.install-copy strong {
  display: block;
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: 800;
  color: var(--header-color);
  margin-bottom: 0.35rem;
}

.install-copy p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.install-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.95rem;
}

.install-action,
.install-dismiss {
  border-radius: 999px;
  font-family: var(--font-ui);
  font-size: 0.92rem;
  font-weight: 700;
  padding: 0.72rem 1rem;
  border: 1px solid var(--border-color);
  cursor: pointer;
}

.install-action {
  background: var(--accent-color);
  color: #0f141a;
  border-color: var(--accent-color);
}

.install-dismiss {
  background: transparent;
  color: var(--text-color);
}

.sidebar-overlay {
  display: none;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--sidebar-bg);
  border-right: 1px solid var(--border-color);
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  padding: 5.5rem 1.5rem 2rem 1.5rem;
  z-index: 100;
  transform: translateX(0);
  transition: transform 0.28s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.sidebar-title {
  font-family: var(--font-headline);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--header-color);
  text-decoration: none;
  display: block;
  margin-bottom: 2.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.volume-label {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-bottom: 1rem;
  display: block;
}

.chapter-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.chapter-item {
  margin-bottom: 0.25rem;
}

.chapter-item-header {
  display: flex;
  align-items: center;
  position: relative;
}

.chapter-item-header a {
  flex: 1;
  display: block;
  padding: 0.6rem 0.75rem;
  margin-left: -0.75rem;
  color: var(--text-color);
  text-decoration: none;
  font-family: var(--font-ui);
  font-size: 0.95rem;
  border-radius: 6px;
  transition: background-color 0.2s, color 0.2s;
  line-height: 1.4;
}

.chapter-item-header a:hover {
  color: var(--accent-color);
  background-color: var(--hover-bg);
}

.chapter-item-header a.active {
  color: var(--accent-color);
  background-color: var(--active-bg);
  font-weight: 600;
}

.expand-toggle {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.5rem;
  margin-right: -0.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease, color 0.2s;
}

.expand-toggle:hover {
  color: var(--text-color);
}

.chapter-item.expanded .expand-toggle {
  transform: rotate(90deg);
}

.sub-chapter-list {
  list-style: none;
  padding: 0 0 0.5rem 0.75rem;
  margin: 0;
  display: none;
  border-left: 1px solid var(--border-color);
  margin-left: 0.25rem;
}

.chapter-item.expanded .sub-chapter-list {
  display: block;
}

.sub-chapter-item a {
  display: block;
  padding: 0.4rem 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  border-radius: 4px;
  transition: color 0.2s, background-color 0.2s;
}

.sub-chapter-item a:hover,
.sub-chapter-item a.active {
  color: var(--accent-color);
  background-color: var(--hover-bg);
}

.vol-num {
  color: var(--text-muted);
  margin-right: 4px;
  font-weight: 400;
  font-size: 0.9em;
}

/* Main Content Area */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  width: calc(100% - var(--sidebar-width));
  min-height: 100vh;
  transition: margin-left 0.28s ease, width 0.28s ease;
}

.sidebar-collapsed .sidebar {
  transform: translateX(calc(-100% - 2rem));
}

.sidebar-collapsed .main-content {
  margin-left: 0;
  width: 100%;
}

/* Content Container */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 8.75rem 4rem 4rem 4rem;
}

.hero-block {
  padding: 0 0 3rem 0;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.hero-block--compact {
  padding-bottom: 2.25rem;
}

.hero-kicker {
  margin: 0 0 0.75rem 0;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero-copy {
  max-width: 46rem;
  font-size: 1.15rem;
  color: var(--text-muted);
}

.library-section {
  margin-top: 3.5rem;
}

.section-heading {
  margin-bottom: 1.5rem;
}

.section-heading h2 {
  margin-bottom: 0.5rem;
}

.section-heading p {
  margin: 0;
  color: var(--text-muted);
}

/* Grid & Cards (Library/Index View) */
.library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 30px;
}

.volume-card {
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: 8px;
  transition: transform 0.2s, box-shadow 0.2s;
  background-color: var(--surface-color);
  display: flex;
  flex-direction: column;
}

.volume-card-link {
  text-decoration: none;
  color: inherit;
}

.volume-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--shadow-color);
  border-color: var(--accent-color);
}

.volume-number {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-bottom: 12px;
}

.volume-card h3 {
  margin: 0 0 12px 0;
  font-family: var(--font-headline);
  font-size: 1.4rem;
  font-weight: 800;
  line-height: 1.2;
}

.volume-card-link h3 {
  color: var(--header-color);
}

.volume-card-link:hover h3,
.volume-card-link:focus-visible h3 {
  color: var(--accent-color);
}

.volume-card-link:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 3px;
}

.volume-card p {
  margin: 0;
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.page-shell {
  max-width: 48rem;
}

.page-context {
  margin-bottom: 1.5rem;
}

.manuscript-content h1:first-child {
  margin-top: 0;
}

/* Volume Header Styles (Article View) */
.volume-header {
  padding: 0 0 40px 0;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
}

.volume-meta {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 700;
}

.volume-header h1 {
  margin: 15px 0;
  font-family: var(--font-headline);
  font-size: 3rem;
  font-weight: 800;
  color: var(--header-color);
  letter-spacing: -0.02em;
}

.volume-subtitle {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 1.5rem;
  margin: 0;
}

/* Article Typography */
article {
  padding: 0;
}

article h2 {
  font-family: var(--font-headline);
  font-size: 2rem;
  font-weight: 750;
  margin-top: 3.5rem;
  margin-bottom: 1.5rem;
  color: var(--header-color);
}

article h3 {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--header-color);
}

article p {
  margin-bottom: 1.6rem;
}

article blockquote {
  border-left: 4px solid var(--accent-color);
  background-color: var(--blockquote-bg);
  margin: 2.5rem 0;
  padding: 2rem;
  font-style: italic;
  font-size: 1.25rem;
  border-radius: 0 8px 8px 0;
}

article a {
  color: var(--accent-color);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

article a:hover {
  color: var(--accent-hover);
  text-decoration-thickness: 2px;
}

/* Responsive */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
    box-shadow: 4px 0 12px var(--shadow-color);
    transition: transform 0.3s ease;
    z-index: 250;
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .sidebar-overlay.visible {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 200;
    background: var(--overlay-color);
  }
  .main-content {
    margin-left: 0;
    width: 100%;
  }
  .container {
    padding: 9.6rem 1.5rem 4rem 1.5rem;
  }
  .library-grid {
    grid-template-columns: 1fr;
  }
  .volume-header h1 {
    font-size: 2.2rem;
  }
  .language-switcher {
    top: 4.8rem;
  }
  .install-banner {
    left: 1rem;
    width: auto;
  }
  .install-actions {
    flex-direction: column;
  }
}
/* Chapter Navigation */
.chapter-nav {
  display: flex;
  justify-content: center;
  margin: 4rem 0 2rem 0;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.nav-link {
  width: 100%;
  max-width: 500px;
  display: flex;
  flex-direction: column;
  text-decoration: none !important; /* Force no underline */
  color: var(--text-color) !important; /* Prevent disappearance */
  padding: 1.75rem;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--card-bg);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.nav-link:hover {
  transform: translateY(-4px);
  border-color: var(--accent-color);
  background: var(--hover-bg);
  box-shadow: 0 8px 24px var(--shadow-color);
}

.nav-link.next {
  align-items: center;
  text-align: center;
}

.nav-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.2s;
}

.nav-link:hover .nav-label {
  color: var(--accent-color);
}

.nav-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-color);
}

/* Directional indicators */
.nav-link.next .nav-label::after {
  content: "→";
  font-size: 1.1rem;
}

@media (max-width: 650px) {
  .chapter-nav {
    margin-top: 3rem;
  }
  .nav-link {
    padding: 1.5rem;
  }
}

/*# sourceMappingURL=main.css.map */