/* ------------------------------------------------------------------ *
 * site.css — layout and every component. Loaded after tokens.css.
 * ------------------------------------------------------------------ */

*, *::before, *::after { box-sizing: border-box; }

html {
  background: var(--ground);
  color: var(--ink);
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--bar-h) + 15px);  /* the bar is sticky; an #anchor must clear it */
}

body {
  margin: 0;
  font-family: var(--serif);
  font-size: var(--t-body);
  line-height: var(--lh-body);
  font-kerning: normal;
  font-variant-ligatures: common-ligatures;
}

/* Links are underlined rather than coloured-and-underlined in prose, the
   way a book sets them; the accent carries controls and nav instead. */
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

code { font-family: var(--mono); font-size: 0.86em; }
pre {
  font-family: var(--mono); font-size: var(--t-small); line-height: 1.5;
  overflow-x: auto; padding: 1rem; background: var(--wash); border: 1px solid var(--hair);
}

.skip { position: absolute; left: -9999px; }
.skip:focus {
  left: 0.5rem; top: 0.5rem; z-index: 60;
  padding: 0.6rem 0.9rem; background: var(--ground); border: 1px solid var(--accent);
}

/* -------------------------------------------------------- the frame --- *
 * rail | column | margin, centred. The bar is laid out on the same grid,
 * so its rule and its title land exactly where the column does at every
 * width. That alignment is most of why this reads as built rather than
 * themed, and it is the reason both share one template.                   */
.frame, .chrome {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, var(--col)) var(--margin-col);
  column-gap: var(--gap);
  max-width: calc(var(--rail) + var(--col) + var(--margin-col) + 2 * var(--gap) + 2 * var(--pad));
  margin: 0 auto;
  padding: 0 var(--pad);
}

/* ---------------------------------------------------------- the bar --- */
.chrome {
  position: sticky; top: 0; z-index: 50;
  background: var(--ground);
}
.chrome-inner {
  grid-column: 2;
  display: flex; align-items: center; gap: 17px;
  margin: 0 calc(-1 * var(--pad));
  padding: var(--bar-pad) var(--pad);
  border-bottom: 1px solid var(--hair);
}
.site-name {
  display: inline-flex; align-items: center; min-height: 40px;
  margin-right: 9px; padding: 0 2px;
  border-bottom: 2px solid transparent;
  color: var(--ink); font-family: var(--serif); font-size: 1.0625rem;
  text-decoration: none; white-space: nowrap;
}
.site-name:hover, .site-name[aria-current="page"] { border-bottom-color: var(--ink); }

.nav { display: flex; gap: 2px; margin-left: auto; }
.nav a {
  display: flex; align-items: center; min-height: 40px;
  padding: 0 8px;
  border-bottom: 2px solid transparent;
  color: var(--ink-2); font-family: var(--sans); font-size: var(--t-small);
  text-decoration: none; white-space: nowrap;
}
.nav a:hover { color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--ink); }

/* ------------------------------------------------------- the column --- */
.main { grid-column: 2; padding: 2.5rem 0 5rem; }
/* the home page ends in the post list, which is its own grid child */
.main--index { padding-top: 0; padding-bottom: 0.6rem; }
.rail { grid-column: 1; }

h1, h2, h3 { font-family: var(--serif); font-weight: 400; line-height: var(--lh-tight); }
h1 { font-size: var(--t-h1); margin: 0 0 0.6rem; }
h2 { font-size: var(--t-h2); margin: 2.6rem 0 0.5rem; }
h3 { font-size: var(--t-h3); font-style: italic; margin: 2rem 0 0.4rem; }
p { margin: 0 0 1.15rem; }

blockquote {
  margin: 1.6rem 0; padding: 0 0 0 1.1rem;
  border-left: 2px solid var(--accent);
  font-style: italic; color: var(--ink-2);
}

hr { height: 0; margin: 2.5rem 0; border: 0; border-top: 1px solid var(--rule); }

/* --------------------------------------------------------- masthead --- */
.masthead { margin-bottom: 2.2rem; }
.masthead h1 { font-size: var(--t-title); letter-spacing: -0.01em; }
.masthead .standfirst {
  margin: 0; max-width: 34em;
  color: var(--ink-2); font-size: 1.0625rem;
}

.byline {
  margin: 0 0 2rem;
  color: var(--ink-2); font-family: var(--sans); font-size: var(--t-small);
  font-variant-numeric: tabular-nums;
}

/* ------------------------------------------------------------ plate --- *
 * A photograph is set as a plate in a book: inside the measure, its
 * caption under it in small sans, credited. Not a banner behind the type. */
.plate { margin: 0 0 3rem; }
/* A plate given the whole frame rather than the measure — rail, column and
   sidenote margin together. It is the one image on the site, so it is allowed
   to be the largest thing on the page; everything under it stays in the
   column. The caption keeps the text column's left edge, so it reads as
   belonging to the page rather than floating under a banner. */
.plate--wide {
  grid-column: 1 / -1;
  margin: 2.5rem 0 3.2rem;
  display: grid;
  grid-template-columns: subgrid;   /* the frame's own columns, at every width */
}
.plate--wide img { grid-column: 1 / -1; }
.plate--wide figcaption { grid-column: 2; }
.plate img { display: block; width: 100%; height: auto; }
.plate figcaption {
  margin-top: 0.5rem;
  color: var(--ink-2); font-family: var(--sans); font-size: var(--t-small); line-height: 1.45;
}

/* ------------------------------------------------------- post list --- *
 * The date is set in the rail column, not joined to the title's line. It
 * is the one thing every entry shares and the one thing you scan the list
 * by, so it gets a column of its own and the titles keep a clean left
 * edge. Ranged right, so the dates sit against the gap that separates
 * them from the text they belong to.                                      */
.posts {
  grid-column: 1 / 3;
  margin: 0; padding: 0; list-style: none;
}
.posts li {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, var(--col));
  column-gap: var(--gap);
  padding: 1.15rem 0;
  border-top: 1px solid var(--hair);
}
.posts li:first-child { border-top: 1px solid var(--rule); }
.posts .when {
  grid-column: 1;
  margin: 0; padding-top: 0.4rem;
  text-align: right;
  color: var(--ink-3); font-family: var(--sans); font-size: var(--t-small); line-height: 1.35;
  font-variant-numeric: tabular-nums;
}
.posts .when .mins { display: block; }
.posts .entry { grid-column: 2; }
.posts h2 {
  margin: 0 0 0.2rem;
  font-size: var(--t-h3); line-height: 1.25;
}
.posts h2 a { color: var(--ink); text-decoration: none; }
.posts h2 a:hover { text-decoration: underline; text-underline-offset: 3px; }
.posts .dek { margin: 0; color: var(--ink-2); font-size: 1.0625rem; line-height: 1.5; }

.section-head {
  margin: 0 0 0.9rem;
  font-family: var(--sans); font-size: var(--t-small); font-weight: 600;
  color: var(--ink-2);
}

/* ------------------------------------------------------------- rail --- */
.rail-inner {
  position: sticky; top: calc(var(--bar-h) + 2.5rem);
  font-family: var(--sans); font-size: var(--t-small); line-height: 1.4;
}
.rail-title { margin: 0 0 0.6rem; color: var(--ink-3); }
.rail ol { margin: 0; padding: 0; list-style: none; }
.rail ol ol { margin: 0.25rem 0 0.4rem 0.75rem; }
.rail li { margin: 0 0 0.45rem; }
.rail a {
  color: var(--ink-2); text-decoration: none;
  border-left: 2px solid transparent; margin-left: -10px; padding-left: 8px;
  display: block;
}
.rail a:hover { color: var(--ink); }
.rail a.is-current { color: var(--ink); border-left-color: var(--accent); }

/* -------------------------------------------------------- sidenotes --- *
 * Written as ordinary kramdown footnotes; a script lifts them out here at
 * widths that have a margin to put them in, and leaves them as footnotes
 * at widths that do not. Floated rather than positioned, so several in a
 * row stack instead of landing on top of each other.                      */
.sidenote {
  float: right; clear: right;
  width: var(--margin-col);
  margin-right: calc(-1 * (var(--margin-col) + var(--gap)));
  margin-bottom: 1rem;
  font-family: var(--sans); font-size: var(--t-small); line-height: 1.45;
  color: var(--ink-2);
  text-align: left;
}
.sidenote-number {
  font-family: var(--sans); font-size: 0.7em; font-variant-numeric: tabular-nums;
  color: var(--accent);
  vertical-align: super; line-height: 0;
  padding: 0 0.1em;
}
.sidenote p { margin: 0 0 0.6rem; }
.sidenote p:last-child { margin-bottom: 0; }
/* the same number again at the head of the note, but run into its first line
   rather than raised off it — superscript is for the reference, not the note */
.sidenote .sidenote-number {
  vertical-align: baseline;
  line-height: inherit;
  font-size: 0.9em;
  padding: 0;
}

/* the footnote list, shown only when the notes are not in the margin */
.footnotes { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--rule); font-size: 1rem; }
.footnotes p { margin: 0 0 0.6rem; }
[hidden] { display: none !important; }

/* --------------------------------------------------------- footer --- */
.foot {
  grid-column: 2;
  padding: 1.2rem 0 3rem; border-top: 1px solid var(--hair);
  color: var(--ink-3); font-family: var(--sans); font-size: var(--t-small);
  display: flex; gap: 1rem; flex-wrap: wrap;
}
.foot a { color: var(--ink-2); text-decoration: none; }
.foot a:hover { color: var(--ink); text-decoration: underline; }

/* ------------------------------------------------------ narrowing --- *
 * Three steps, each dropping the outermost thing the width can no longer
 * hold: first the rail, then the margin the sidenotes live in.            */
@media (max-width: 1300px) {
  .frame, .chrome {
    grid-template-columns: minmax(0, var(--col)) var(--margin-col);
    max-width: calc(var(--col) + var(--margin-col) + var(--gap) + 2 * var(--pad));
  }
  .main, .chrome-inner, .foot { grid-column: 1; }
  .rail { display: none; }
  .plate--wide figcaption { grid-column: 1; }
  /* no rail column to set the dates in: they go back above the title */
  .posts { grid-column: 1; }
  .posts li { display: block; }
  .posts .when {
    padding-top: 0; margin-bottom: 0.3rem;
    text-align: left;
  }
  .posts .when .mins { display: inline; }
  .posts .when .mins::before { content: "  ·  "; }
}
@media (max-width: 1000px) {
  .frame, .chrome {
    grid-template-columns: minmax(0, var(--col));
    max-width: calc(var(--col) + 2 * var(--pad));
  }
  .sidenote {
    float: none; width: auto; margin-right: 0;
    display: block; padding: 0.6rem 0 0.6rem 0.9rem;
    border-left: 2px solid var(--hair);
    margin-bottom: 1.15rem;
  }
}
@media (max-width: 620px) {
  :root { --t-title: 2.125rem; --t-h1: 1.875rem; --t-h2: 1.5rem; --t-h3: 1.25rem; }

  /* Six labels and the name do not fit one 390px row, so the name takes a
     row of its own and the labels range across the one beneath it. Two rows
     is only affordable if the bar stops being sticky — 80px of pinned chrome
     on a phone is most of what you can see of a paragraph — so it scrolls
     away here and the reader gets the screen back. */
  .chrome { position: static; }
  .chrome-inner { flex-wrap: wrap; gap: 0; padding-bottom: 0; }
  .site-name { width: 100%; min-height: 34px; margin-right: 0; }
  .nav {
    width: 100%; margin-left: -8px;
    justify-content: space-between;
  }
  .nav a { min-height: 38px; padding: 0 6px; }

  html { scroll-padding-top: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: 0.01ms !important; }
}

/* the rail's second level, for h3s inside a long essay */
.rail-sub { margin-left: 0.85rem; }
.rail-sub a { font-size: 0.95em; }

/* ---------------------------------------------------------- topics --- */
.topics { margin: 0.4rem 0 0; padding: 0; list-style: none;
          display: flex; flex-wrap: wrap; gap: 0.3rem 1rem; }
.topics a { color: var(--ink-2); font-family: var(--sans); font-size: var(--t-small);
            text-decoration: none; }
.topics a:hover { color: var(--ink); text-decoration: underline; }
.topics .n { color: var(--ink-3); font-variant-numeric: tabular-nums; }

.post-topics {
  margin: 3rem 0 0; padding-top: 1rem; border-top: 1px solid var(--hair);
  font-family: var(--sans); font-size: var(--t-small); color: var(--ink-3);
}
.post-topics a { color: var(--ink-2); text-decoration: none; }
.post-topics a:hover { color: var(--ink); text-decoration: underline; }