/* ============================================================
   MT ADVERTISING LLC
   One stylesheet, shared by every page.
   The home is a frontispiece and a table of contents.
   The interior pages are a single column with a margin for notes.
   method.html is the one dark page.
   ============================================================ */

/* ---------- FONTS, self-hosted, latin subset ---------- */
@font-face{font-family:'EB Garamond';src:url('fonts/eb-garamond-400.woff2') format('woff2');
  font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'EB Garamond';src:url('fonts/eb-garamond-400-italic.woff2') format('woff2');
  font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:'EB Garamond';src:url('fonts/eb-garamond-500.woff2') format('woff2');
  font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:'EB Garamond';src:url('fonts/eb-garamond-600.woff2') format('woff2');
  font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:'Cormorant Garamond';src:url('fonts/cormorant-garamond-300.woff2') format('woff2');
  font-weight:300;font-style:normal;font-display:swap}
@font-face{font-family:'IBM Plex Mono';src:url('fonts/ibm-plex-mono-400.woff2') format('woff2');
  font-weight:400;font-style:normal;font-display:swap}

/* ---------- TOKENS ---------- */
:root{
  --parchment:#F2ECDF;
  --parchment-2:#E8E0CE;
  --vellum:#FAF6EC;
  --ink:#191510;
  --ink-2:#4E4636;
  --rule:#C9BEA4;
  --porphyry:#7A2E24;
  --verdigris:#4C6B5C;
  --gold:#A88742;

  --serif:'EB Garamond',Garamond,'Times New Roman',serif;
  --display:'Cormorant Garamond','EB Garamond',Garamond,serif;
  --mono:'IBM Plex Mono',ui-monospace,'SF Mono',Menlo,monospace;

  --measure:34rem;
  --note:14rem;

  --s1:8px;  --s2:16px; --s3:24px; --s4:32px;
  --s5:48px; --s6:64px; --s7:96px; --s8:128px;
}

/* ---------- RESET ---------- */
*,*::before,*::after{box-sizing:border-box}
html,body,h1,h2,h3,h4,p,ul,ol,li,figure,figcaption,table,dl,dt,dd,address{margin:0;padding:0}
ul{list-style:none}
img{display:block;max-width:100%;height:auto}
table{border-collapse:collapse}

html{background:var(--parchment);scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  background:var(--parchment);
  color:var(--ink);
  font-family:var(--serif);
  font-size:20px;
  line-height:1.62;
  font-weight:400;
  text-rendering:optimizeLegibility;
  font-variant-numeric:oldstyle-nums proportional-nums;
  font-variant-ligatures:common-ligatures discretionary-ligatures;
  hanging-punctuation:first last;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

/* ---------- THE PAPER ---------- */
.paper-grain,.paper-vignette{position:fixed;inset:0;pointer-events:none;z-index:60}
.paper-grain{
  opacity:.035;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)'/%3E%3C/svg%3E");
}
.paper-vignette{
  background:radial-gradient(ellipse at center,rgba(25,21,16,0) 56%,rgba(25,21,16,.04) 100%);
}

/* ---------- LINKS ---------- */
a{color:var(--porphyry);text-decoration:none;border-bottom:1px solid var(--rule);
  transition:border-color .18s ease-out}
a:hover{border-bottom-color:var(--porphyry)}
a:focus-visible{outline:2px solid var(--porphyry);outline-offset:3px;border-bottom-color:transparent}

/* Prepared for the AdShield anchor: uncomment the <a> in adshield.html. */
.external-link{
  font-family:var(--mono);font-size:13px;letter-spacing:.08em;
  color:var(--porphyry);border-bottom:1px solid var(--rule);
}
.external-link::after{content:" \2197";font-size:.9em;letter-spacing:0}

.skip{
  position:absolute;left:-9999px;top:0;z-index:100;
  background:var(--vellum);color:var(--ink);padding:var(--s2) var(--s3);
  border:1px solid var(--ink);font-family:var(--mono);font-size:12px;
}
.skip:focus{left:var(--s2);top:var(--s2)}

/* ---------- ORNAMENT ---------- */
.rule-double{
  border-top:2px solid var(--ink);
  border-bottom:1px solid var(--rule);
  height:3px;
}
.rule-double--gold{border-top-color:var(--gold);border-bottom-color:var(--rule)}
.rule-double--short{width:200px;margin-left:auto;margin-right:auto}
.rule-thin{border:0;border-top:1px solid var(--rule)}

.fleuron{
  display:flex;align-items:center;gap:var(--s2);
  color:var(--gold);margin:var(--s6) 0;
}
.fleuron::before,.fleuron::after{content:"";flex:1;height:1px;background:var(--rule)}
.fleuron svg{flex:none;display:block}

.meander{display:block;width:100%;max-width:26rem;height:14px;
  margin:var(--s5) auto var(--s3);color:var(--gold)}
.scroll-cue{display:block;margin:0 auto;color:var(--porphyry)}

.dropcap{
  float:left;font-family:var(--display);font-weight:300;color:var(--porphyry);
  font-size:78px;line-height:.78;padding:8px 12px 0 0;letter-spacing:.01em;
}

/* ---------- ENGRAVINGS, duotone ---------- */
/* Tuned to the porphyry of the numerals. The brightness at the end of the
   chain clips each scan's own paper to white, where multiply is a no-op:
   without it every plate shows its sheet as a warm rectangle. */
.engraving img{
  width:100%;
  filter:grayscale(1) contrast(1.28) sepia(.62) hue-rotate(-24deg)
         saturate(2.1) brightness(var(--plate-lift,1.14));
  mix-blend-mode:multiply;
  opacity:.86;
}
.engraving--inverted img{
  filter:grayscale(1) contrast(1.4) brightness(1.14)
         invert(1) sepia(.42) hue-rotate(-24deg) saturate(1.5);
  mix-blend-mode:screen;opacity:.9;
}

/* ============================================================
   HOME
   ============================================================ */
.frontispiece{
  text-align:center;
  padding:var(--s8) var(--s4) var(--s6);
}
.frontispiece__inner{max-width:40rem;margin:0 auto}
.frontispiece figure{margin:0 auto var(--s5);max-width:380px}

.wordmark{
  font-family:var(--display);font-weight:300;
  font-size:clamp(42px,7.4vw,84px);line-height:1;letter-spacing:.07em;
  color:var(--ink);
}
.wordmark span{
  display:block;font-family:var(--mono);font-size:11px;letter-spacing:.42em;
  color:var(--ink-2);margin-top:var(--s2);
}
.frontispiece .rule-double{margin:var(--s4) auto}
.motto{
  font-family:var(--serif);font-variant-caps:small-caps;
  font-size:19px;letter-spacing:.22em;color:var(--porphyry);
}
.frontispiece__line{
  margin:var(--s4) auto 0;max-width:30rem;font-size:21px;line-height:1.5;
}
.colophon{
  margin-top:var(--s6);padding-top:var(--s3);border-top:1px solid var(--rule);
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;
  color:var(--ink-2);line-height:2.2;
}

.thesis{
  max-width:36rem;margin:0 auto;padding:var(--s7) var(--s4);
  text-align:center;font-size:22px;line-height:1.55;
}

/* ---------- CONTENTS, with leader dots ---------- */
.contents{max-width:46rem;margin:0 auto;padding:0 var(--s4) var(--s7)}
.contents__head{
  font-family:var(--mono);font-size:11px;letter-spacing:.24em;text-transform:uppercase;
  color:var(--ink-2);padding-bottom:var(--s1);
}
.toc__entry{
  display:block;border:0;border-bottom:1px solid var(--rule);
  text-decoration:none;color:inherit;padding:var(--s2) 0;
}
.toc__entry:last-child{border-bottom:0}
.toc__entry:hover .toc__title{color:var(--porphyry)}
.toc__entry:focus-visible{outline:2px solid var(--porphyry);outline-offset:4px}
.toc__line{display:flex;align-items:baseline;gap:var(--s2)}
.toc__num{
  flex:none;width:2.6rem;
  font-family:var(--mono);font-size:12px;letter-spacing:.16em;color:var(--porphyry);
  font-variant-numeric:tabular-nums lining-nums;
}
.toc__title{
  flex:none;font-variant-caps:small-caps;font-size:23px;letter-spacing:.05em;
  color:var(--ink);transition:color .18s ease-out;
}
/* The leader: a flexible element carrying a dotted border, so the dots
   absorb the slack and the gloss stays flush right at any width. */
.toc__dots{flex:1 1 auto;min-width:var(--s3);border-bottom:1px dotted var(--rule);
  transform:translateY(-5px)}
.toc__gloss{
  flex:none;max-width:22rem;text-align:right;
  font-style:italic;font-size:17px;color:var(--ink-2);
}
.toc__status{
  display:block;margin:4px 0 0 calc(2.6rem + var(--s2));
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ink-2);
}
.toc__status--build{color:var(--verdigris)}
.toc__break{margin:var(--s2) 0}

.contact{max-width:34rem;margin:0 auto;padding:0 var(--s4) var(--s8);text-align:center}
.contact__email{font-size:25px;margin-top:var(--s3)}

/* ============================================================
   INTERIOR PAGES
   ============================================================ */
/* The running head sits flush with the text block, so it has to follow the
   same measure the sheet uses, margin column included above 1200px. */
.masthead{
  padding:var(--s4) var(--s4) 0;
  max-width:calc(var(--measure) + var(--s4) * 2);
  margin:0 auto;
}
@media (min-width:1201px){
  .masthead{max-width:calc(var(--measure) + var(--note) + var(--s5) + var(--s4) * 2)}
}
.masthead a{
  display:inline-flex;align-items:center;gap:var(--s1);
  border:0;color:var(--ink-2);
  font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;
  transition:color .18s ease-out;
}
.masthead a:hover{color:var(--porphyry)}
.masthead svg{flex:none;display:block}

.page{padding:var(--s6) var(--s4) var(--s7)}

.sheet{
  display:grid;
  grid-template-columns:minmax(0,var(--measure)) var(--note);
  column-gap:var(--s5);
  justify-content:center;
  align-content:start;
}
.sheet>*{grid-column:1;min-width:0}
.sheet>.marginal{grid-column:2}

.opening{margin-bottom:var(--s4)}
.opening__numeral{
  display:block;font-family:var(--mono);font-size:12px;letter-spacing:.2em;
  color:var(--porphyry);margin-bottom:var(--s2);
}
.opening__title{
  font-family:var(--serif);font-weight:600;font-size:40px;line-height:1.15;
  letter-spacing:-.012em;
  display:flex;align-items:center;gap:var(--s2);flex-wrap:wrap;
}
.opening__standfirst{
  margin-top:var(--s2);font-style:italic;color:var(--ink-2);font-size:22px;line-height:1.45;
}
.opening figure{margin-top:var(--s4);max-width:300px}

.tag{
  font-family:var(--mono);font-size:9px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--verdigris);border:1px solid var(--verdigris);
  padding:3px 7px 2px;white-space:nowrap;
}

.copy{margin-bottom:var(--s3)}
.copy p{margin-bottom:var(--s3)}
.copy p:last-child{margin-bottom:0}

.marginal{
  font-size:15px;line-height:1.5;font-style:italic;color:var(--ink-2);
  font-variant-numeric:oldstyle-nums;padding-top:6px;
}

/* ---------- capability table ---------- */
.data{
  font-family:var(--mono);font-style:normal;font-size:12px;letter-spacing:.1em;
  color:var(--ink-2);line-height:2.1;
  font-variant-numeric:tabular-nums lining-nums;
  margin-top:var(--s4);
}
.data div{
  display:grid;grid-template-columns:9.5rem 1fr;gap:var(--s2);
  border-bottom:1px solid var(--rule);padding:2px 0;
}
.data div:first-child{border-top:1px solid var(--rule)}
.data dt{font-weight:400;text-transform:uppercase;color:var(--ink-2)}
.data dd{color:var(--ink);text-transform:uppercase}

/* ---------- pagination ---------- */
.pagination{
  max-width:calc(var(--measure) + var(--note) + var(--s5));
  margin:var(--s8) auto 0;
  border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);
  padding:var(--s3) 0;
  display:flex;justify-content:space-between;gap:var(--s3);
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
}
.pagination a{
  border:0;color:var(--ink-2);display:inline-flex;align-items:baseline;gap:var(--s1);
  transition:color .18s ease-out;
}
.pagination a:hover{color:var(--porphyry)}
.pagination em{font-style:normal;color:var(--porphyry)}
.pagination__next{margin-left:auto;text-align:right}

/* ============================================================
   THE DARK PAGE, method.html
   ============================================================ */
.dark{background:var(--ink);color:var(--parchment)}
.dark body,body.dark{background:var(--ink)}
.dark .paper-grain{opacity:.05}
.dark .paper-vignette{background:radial-gradient(ellipse at center,rgba(242,236,223,0) 58%,rgba(242,236,223,.03) 100%)}
.dark .opening__numeral{color:var(--gold)}
.dark .opening__title{color:var(--parchment)}
.dark .opening__standfirst{color:var(--rule)}
.dark .rule-double{border-top-color:var(--gold);border-bottom-color:rgba(201,190,164,.35)}
.dark .rule-thin{border-top-color:rgba(201,190,164,.3)}
.dark .copy p{color:var(--rule)}
.dark .masthead a{color:var(--rule)}
.dark .masthead a:hover{color:var(--gold)}
.dark a{color:var(--gold);border-bottom-color:rgba(201,190,164,.4)}
.dark a:focus-visible{outline-color:var(--gold)}
.dark .pagination{border-color:rgba(201,190,164,.3)}
.dark .pagination a{color:var(--rule)}
.dark .pagination a:hover{color:var(--gold)}
.dark .pagination em{color:var(--gold)}
.dark .colophon-foot{background:var(--ink);border-top-color:rgba(201,190,164,.3)}
.dark .colophon-foot p{color:var(--rule)}
.dark .colophon-foot a{color:var(--gold)}
.dark .fleuron::before,.dark .fleuron::after{background:rgba(201,190,164,.35)}
/* Multiply on an ink ground returns ink, so the tailpiece has to invert
   with the rest of the dark page or it disappears. */
.dark .colophon-foot .engraving img{
  filter:grayscale(1) contrast(1.4) brightness(1.3)
         invert(1) sepia(.42) hue-rotate(-24deg) saturate(1.5);
  mix-blend-mode:screen;opacity:.9;
}

.tenet{margin-bottom:var(--s6)}
.tenet:last-child{margin-bottom:0}
.tenet h2{
  font-weight:500;font-style:italic;font-size:27px;line-height:1.3;
  margin-bottom:var(--s2);color:var(--parchment);
}
.tenet p{color:var(--rule)}

/* ============================================================
   FOOTER, identical on every page
   ============================================================ */
.colophon-foot{
  background:var(--parchment-2);border-top:1px solid var(--rule);
  padding:var(--s6) var(--s4) var(--s7);text-align:center;
}
.colophon-foot figure{max-width:80px;margin:0 auto var(--s3)}
/* The Schongauer sheet is greyer than the others and needs more lift
   before multiply stops showing its edge. */
.colophon-foot .engraving img{--plate-lift:1.34}
.colophon-foot p{
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  color:var(--ink-2);line-height:2.2;
}
.colophon-foot__links{margin-top:var(--s2)}

/* ============================================================
   PRIVACY
   ============================================================ */
.plain{max-width:var(--measure);margin:0 auto}

/* ============================================================
   ANIMATION
   Opt-in from script.js, so a blocked script cannot blank the page.
   ============================================================ */
.js-reveal .reveal{opacity:0;transform:translateY(10px)}
.js-reveal .reveal.is-visible{
  opacity:1;transform:none;
  transition:opacity .5s ease-out,transform .5s ease-out;
}
@media (prefers-reduced-motion:reduce){
  .js-reveal .reveal,.js-reveal .reveal.is-visible{
    opacity:1;transform:none;transition:none;
  }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1200px){
  .sheet{grid-template-columns:minmax(0,var(--measure));justify-content:center}
  .sheet>.marginal{
    grid-column:1;
    border-left:2px solid var(--rule);padding:2px 0 2px var(--s2);
    margin:0 0 var(--s3);max-width:var(--measure);
  }
  .dark .sheet>.marginal{border-left-color:rgba(201,190,164,.4)}
  .pagination{max-width:var(--measure)}
}

@media (max-width:900px){
  .toc__line{flex-wrap:wrap}
  .toc__dots{display:none}
  .toc__gloss{
    flex:1 1 100%;text-align:left;max-width:none;
    margin:4px 0 0 calc(2.6rem + var(--s2));
  }
}

@media (max-width:768px){
  body{font-size:18px}
  .frontispiece{padding:var(--s6) var(--s3) var(--s5)}
  .thesis{padding:var(--s6) var(--s3);font-size:20px}
  .contents{padding:0 var(--s3) var(--s6)}
  .contact{padding:0 var(--s3) var(--s6)}
  .page{padding:var(--s5) var(--s3) var(--s6)}
  .masthead{padding:var(--s3) var(--s3) 0}
  .opening__title{font-size:32px}
  .opening__standfirst{font-size:20px}
  .toc__title{font-size:21px}
  .contact__email{font-size:21px}
  .dropcap{font-size:62px}
  .data div{grid-template-columns:1fr;gap:0;padding:var(--s1) 0}
  .pagination{flex-direction:column;gap:var(--s2)}
  .pagination__next{margin-left:0;text-align:left}
  .colophon-foot{padding:var(--s5) var(--s3) var(--s6)}
}

@media (max-width:420px){
  body{font-size:17px}
  .wordmark{letter-spacing:.04em}
  .motto{font-size:16px;letter-spacing:.16em}
  .colophon{letter-spacing:.14em}
  .opening__title{font-size:27px}
  .toc__title{font-size:19px}
  .toc__num{width:2.2rem}
  .toc__status,.toc__gloss{margin-left:calc(2.2rem + var(--s2))}
  .dropcap{font-size:52px;padding-right:10px}
  .page,.frontispiece,.thesis,.contents,.contact{padding-left:var(--s2);padding-right:var(--s2)}
}

/* ---------- PRINT ---------- */
@media print{
  .paper-grain,.paper-vignette,.scroll-cue,.pagination,.masthead{display:none}
  .dark,.dark body{background:none;color:var(--ink)}
  .dark .opening__title,.tenet h2{color:var(--ink)}
  .dark .copy p,.tenet p{color:var(--ink-2)}
  .engraving--inverted img{filter:grayscale(1) contrast(1.2);mix-blend-mode:multiply}
  .reveal{opacity:1;transform:none}
  a{color:var(--ink)}
}