@charset "UTF-8";

/* Import ET Book styles
   adapted from https://github.com/edwardtufte/et-book/blob/gh-pages/et-book.css */

@font-face {
    font-family: "et-book";
    src: url("et-book/et-book-roman-line-figures/et-book-roman-line-figures.eot");
    src: url("et-book/et-book-roman-line-figures/et-book-roman-line-figures.eot?#iefix") format("embedded-opentype"), url("et-book/et-book-roman-line-figures/et-book-roman-line-figures.woff") format("woff"), url("et-book/et-book-roman-line-figures/et-book-roman-line-figures.ttf") format("truetype"), url("et-book/et-book-roman-line-figures/et-book-roman-line-figures.svg#etbookromanosf") format("svg");
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "et-book";
    src: url("et-book/et-book-display-italic-old-style-figures/et-book-display-italic-old-style-figures.eot");
    src: url("et-book/et-book-display-italic-old-style-figures/et-book-display-italic-old-style-figures.eot?#iefix") format("embedded-opentype"), url("et-book/et-book-display-italic-old-style-figures/et-book-display-italic-old-style-figures.woff") format("woff"), url("et-book/et-book-display-italic-old-style-figures/et-book-display-italic-old-style-figures.ttf") format("truetype"), url("et-book/et-book-display-italic-old-style-figures/et-book-display-italic-old-style-figures.svg#etbookromanosf") format("svg");
    font-weight: normal;
    font-style: italic;
    font-display: swap;
}

@font-face {
    font-family: "et-book";
    src: url("et-book/et-book-bold-line-figures/et-book-bold-line-figures.eot");
    src: url("et-book/et-book-bold-line-figures/et-book-bold-line-figures.eot?#iefix") format("embedded-opentype"), url("et-book/et-book-bold-line-figures/et-book-bold-line-figures.woff") format("woff"), url("et-book/et-book-bold-line-figures/et-book-bold-line-figures.ttf") format("truetype"), url("et-book/et-book-bold-line-figures/et-book-bold-line-figures.svg#etbookromanosf") format("svg");
    font-weight: bold;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "et-book-roman-old-style";
    src: url("et-book/et-book-roman-old-style-figures/et-book-roman-old-style-figures.eot");
    src: url("et-book/et-book-roman-old-style-figures/et-book-roman-old-style-figures.eot?#iefix") format("embedded-opentype"), url("et-book/et-book-roman-old-style-figures/et-book-roman-old-style-figures.woff") format("woff"), url("et-book/et-book-roman-old-style-figures/et-book-roman-old-style-figures.ttf") format("truetype"), url("et-book/et-book-roman-old-style-figures/et-book-roman-old-style-figures.svg#etbookromanosf") format("svg");
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

/* Tufte CSS styles */
html {
    font-size: 15px;
}

body {
    width: 87.5%;
    margin-left: auto;
    margin-right: auto;
    padding-left: 12.5%;
    font-family: et-book, Palatino, "Palatino Linotype", "Palatino LT STD", "Book Antiqua", Georgia, serif;
    background-color: #fffff8;
    color: #111;
    max-width: 1400px;
    counter-reset: sidenote-counter;
}

h1 {
    font-weight: 400;
    margin-top: 4rem;
    margin-bottom: 1.5rem;
    font-size: 3.2rem;
    line-height: 1;
}

h2 {
    font-style: italic;
    font-weight: 400;
    margin-top: 2.1rem;
    margin-bottom: 1.4rem;
    font-size: 2.2rem;
    line-height: 1;
}

h3 {
    font-style: italic;
    font-weight: 400;
    font-size: 1.7rem;
    margin-top: 2rem;
    margin-bottom: 1.4rem;
    line-height: 1;
}

hr {
    display: block;
    height: 1px;
    width: 55%;
    border: 0;
    border-top: 1px solid #ccc;
    margin: 1em 0;
    padding: 0;
}

p.subtitle {
    font-style: italic;
    margin-top: 1rem;
    margin-bottom: 1rem;
    font-size: 1.8rem;
    display: block;
    line-height: 1;
}

.numeral {
    font-family: et-book-roman-old-style;
}

.danger {
    color: red;
}

article {
    padding: 5rem 0rem;
}

section {
    padding-top: 1rem;
    padding-bottom: 1rem;
}

/* Clearfix: contain floated margin notes inside their section */
section::after {
  content: "";
  display: block;
  clear: both;
}

p,
dl,
ol,
ul {
    font-size: 1.4rem;
    line-height: 2rem;
}

p {
    margin-top: 1.4rem;
    margin-bottom: 1.4rem;
    padding-right: 0;
    vertical-align: baseline;
}

/* Chapter Epigraphs */
div.epigraph {
    margin: 5em 0;
}

div.epigraph > blockquote {
    margin-top: 3em;
    margin-bottom: 3em;
}

div.epigraph > blockquote,
div.epigraph > blockquote > p {
    font-style: italic;
}

div.epigraph > blockquote > footer {
    font-style: normal;
}

div.epigraph > blockquote > footer > cite {
    font-style: italic;
}
/* end chapter epigraphs styles */

blockquote {
    font-size: 1.4rem;
}

blockquote p {
    width: 55%;
    margin-right: 40px;
}

blockquote footer {
    width: 55%;
    font-size: 1.1rem;
    text-align: right;
}

section > p,
section > footer,
section > table {
    width: 55%;
}

/* 50 + 5 == 55, to be the same width as paragraph */
section > dl,
section > ol,
section > ul {
    width: 50%;
    -webkit-padding-start: 5%;
}

dt:not(:first-child),
li:not(:first-child) {
    margin-top: 0.25rem;
}

figure {
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
    max-width: 55%;
    -webkit-margin-start: 0;
    -webkit-margin-end: 0;
    margin: 0 0 3em 0;
}

figcaption {
    float: right;
    clear: right;
    margin-top: 0;
    margin-bottom: 0;
    font-size: 1.1rem;
    line-height: 1.6;
    vertical-align: baseline;
    position: relative;
    max-width: 40%;
}

figure.fullwidth figcaption {
    margin-right: 24%;
}

/* Links: replicate underline that clears descenders */
a:link,
a:visited {
    color: inherit;
}

.no-tufte-underline:link {
    background: unset;
    text-shadow: unset;
}

a:link, .tufte-underline, .hover-tufte-underline:hover {
    text-decoration: none;
    background: -webkit-linear-gradient(#fffff8, #fffff8), -webkit-linear-gradient(#fffff8, #fffff8), -webkit-linear-gradient(currentColor, currentColor);
    background: linear-gradient(#fffff8, #fffff8), linear-gradient(#fffff8, #fffff8), linear-gradient(currentColor, currentColor);
    -webkit-background-size: 0.05em 1px, 0.05em 1px, 1px 1px;
    -moz-background-size: 0.05em 1px, 0.05em 1px, 1px 1px;
    background-size: 0.05em 1px, 0.05em 1px, 1px 1px;
    background-repeat: no-repeat, no-repeat, repeat-x;
    text-shadow: 0.03em 0 #fffff8, -0.03em 0 #fffff8, 0 0.03em #fffff8, 0 -0.03em #fffff8, 0.06em 0 #fffff8, -0.06em 0 #fffff8, 0.09em 0 #fffff8, -0.09em 0 #fffff8, 0.12em 0 #fffff8, -0.12em 0 #fffff8, 0.15em 0 #fffff8, -0.15em 0 #fffff8;
    background-position: 0% 93%, 100% 93%, 0% 93%;
}

@media screen and (-webkit-min-device-pixel-ratio: 0) {
    a:link, .tufte-underline, .hover-tufte-underline:hover {
        background-position-y: 87%, 87%, 87%;
    }
}

a:link::selection,
a:link::-moz-selection {
    text-shadow: 0.03em 0 #b4d5fe, -0.03em 0 #b4d5fe, 0 0.03em #b4d5fe, 0 -0.03em #b4d5fe, 0.06em 0 #b4d5fe, -0.06em 0 #b4d5fe, 0.09em 0 #b4d5fe, -0.09em 0 #b4d5fe, 0.12em 0 #b4d5fe, -0.12em 0 #b4d5fe, 0.15em 0 #b4d5fe, -0.15em 0 #b4d5fe;
    background: #b4d5fe;
}

/* Sidenotes, margin notes, figures, captions */
img {
    max-width: 100%;
}

.sidenote,
.marginnote {
    float: right;
    clear: right;
    margin-right: -60%;
    width: 50%;
    margin-top: 0.3rem;
    margin-bottom: 0;
    font-size: 1.1rem;
    line-height: 1.3;
    vertical-align: baseline;
    position: relative;
}

.sidenote-number {
    counter-increment: sidenote-counter;
}

.sidenote-number:after,
.sidenote:before {
    font-family: et-book-roman-old-style;
    position: relative;
    vertical-align: baseline;
}

.sidenote-number:after {
    content: counter(sidenote-counter);
    font-size: 1rem;
    top: -0.5rem;
    left: 0.1rem;
}

.sidenote:before {
    content: counter(sidenote-counter) " ";
    font-size: 1rem;
    top: -0.5rem;
}

blockquote .sidenote,
blockquote .marginnote {
    margin-right: -82%;
    min-width: 59%;
    text-align: left;
}

div.fullwidth,
table.fullwidth {
    width: 100%;
}

div.table-wrapper {
    overflow-x: auto;
    font-family: "Trebuchet MS", "Gill Sans", "Gill Sans MT", sans-serif;
}

.sans {
    font-family: "Gill Sans", "Gill Sans MT", Calibri, sans-serif;
    letter-spacing: .03em;
}

code, pre > code {
    font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace;
    font-size: 1.0rem;
    line-height: 1.42;
    -webkit-text-size-adjust: 100%; /* Prevent adjustments of font size after orientation changes in iOS. See https://github.com/edwardtufte/tufte-css/issues/81#issuecomment-261953409 */
}

.sans > code {
    font-size: 1.2rem;
}

h1 > code,
h2 > code,
h3 > code {
    font-size: 0.80em;
}

.marginnote > code,
.sidenote > code {
    font-size: 1rem;
}

pre > code {
    font-size: 0.9rem;
    width: 52.5%;
    margin-left: 2.5%;
    overflow-x: auto;
    display: block;
}

pre.fullwidth > code {
    width: 90%;
}

.fullwidth {
    max-width: 90%;
    clear:both;
}

span.newthought {
    font-variant: small-caps;
    font-size: 1.2em;
}

input.margin-toggle {
    display: none;
}

label.sidenote-number {
    display: inline;
}

label.margin-toggle:not(.sidenote-number) {
    display: none;
}

.iframe-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    padding-top: 25px;
    height: 0;
}

.iframe-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

@media (max-width: 760px) {
    body {
        width: 84%;
        padding-left: 8%;
        padding-right: 8%;
    }

    hr,
    section > p,
    section > footer,
    section > table {
        width: 100%;
    }

    pre > code {
        width: 97%;
    }

    section > dl,
    section > ol,
    section > ul {
        width: 90%;
    }

    figure {
        max-width: 90%;
    }

    figcaption,
    figure.fullwidth figcaption {
        margin-right: 0%;
        max-width: none;
    }

    blockquote {
        margin-left: 1.5em;
        margin-right: 0em;
    }

    blockquote p,
    blockquote footer {
        width: 100%;
    }

    label.margin-toggle:not(.sidenote-number) {
        display: inline;
    }

    .sidenote,
    .marginnote {
        display: none;
    }

    .margin-toggle:checked + .sidenote,
    .margin-toggle:checked + .marginnote {
        display: block;
        float: left;
        left: 1rem;
        clear: both;
        width: 95%;
        margin: 1rem 2.5%;
        vertical-align: baseline;
        position: relative;
    }

    label {
        cursor: pointer;
    }

    div.table-wrapper,
    table {
        width: 85%;
    }

    img {
        width: 100%;
    }
}

/* === HAMBURGER MENU STYLES === */

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 0;
  position: relative;
  z-index: 100;
}

.logo {
  font-weight: bold;
  font-size: 1.4rem;
}

/* Hamburger icon: 2 lines */
.hamburger {
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.5rem;
  z-index: 101;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background-color: currentColor;
  display: block;
}

/* Hide hamburger when menu is open */
body.menu-open .hamburger {
  display: none;
}

/* Fullscreen overlay */
.menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 100vw;
  background-color: #fffff8;
  color: #111;
  z-index: 100;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.menu-overlay.active {
  display: flex;
}

/* Menu content styling */
.menu-content {
  text-align: center;
  font-size: 2rem;
  gap: 1.5rem;
  display: flex;
  flex-direction: column;
}

/* Menu links — no Tufte underlines, only hover underline */
.menu-content a {
  text-decoration: none;
  position: relative;
  background: none !important;
  text-shadow: none !important;
  color: inherit;
}

.menu-content a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 1px;
  background-color: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.menu-content a:hover::after {
  transform: scaleX(1);
}

/* Close button */
.close-btn {
  position: absolute;
  top: 1rem;
  right: 2rem;
  font-size: 3rem;
  cursor: pointer;
  font-weight: bold;
}

@media (max-width: 760px) {
  .menu-overlay.active {
    align-items: center;     /* horizontal centering */
    padding-top: 0;          /* remove padding here */
  }
  
  .menu-content {
    font-size: 1.8rem;
    margin-top: 4rem;        /* instead of padding-top or shifting parent */
    text-align: center;
    align-items: center;     /* ensure children inside are centered too */
  }
  
  .close-btn {
    font-size: 2.4rem;
    top: 1.5rem;
    right: 1.5rem;
  }
}