/* White Coat Dreamin — Source Serif 4 for reading, IBM Plex Sans for structure. */

:root {
  --bg:        #FFFFFF;
  --surface:   #F7F8F9;
  --ink:       #1A1D23;
  --ink-soft:  #3D444E;
  --muted:     #6B7480;
  --line:      #E4E7EB;
  --accent:    #14636B;
  --accent-lo: #0E4A50;

  --serif: "Source Serif 4", Georgia, "Iowan Old Style", Times, serif;
  --sans:  "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --rail-w: 218px;
  --shell:  1120px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #14171C;
    --surface:   #1A1E24;
    --ink:       #E7EAEF;
    --ink-soft:  #C3CAD3;
    --muted:     #8F99A6;
    --line:      #2A2F38;
    --accent:    #5FC7CF;
    --accent-lo: #8BDCE2;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }
a:hover { color: var(--accent-lo); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #fff; padding: .6rem 1rem; z-index: 10;
  font-family: var(--sans); font-size: .9rem; text-decoration: none;
}
.skip:focus { left: 0; }

/* ---------- masthead ---------- */

.masthead { border-bottom: 1px solid var(--line); background: var(--bg); }
.masthead-inner {
  max-width: var(--shell); margin: 0 auto;
  padding: 1.6rem 1.5rem 0;
}
.brand {
  font-family: var(--serif); font-size: 1.6rem; font-weight: 600;
  letter-spacing: -.015em; color: var(--ink); text-decoration: none; display: inline-block;
}
.brand:hover { color: var(--accent); }
.tagline {
  font-family: var(--sans); font-size: .84rem; color: var(--muted);
  margin: .15rem 0 0; letter-spacing: .005em;
}

.tabs { display: flex; gap: .1rem; margin-top: 1.1rem; overflow-x: auto; }
.tabs a {
  font-family: var(--sans); font-size: .87rem; font-weight: 600;
  color: var(--muted); text-decoration: none;
  padding: .5rem .75rem; white-space: nowrap;
  border-bottom: 2px solid transparent;
}
.tabs a:hover { color: var(--ink); }
.tabs a.on { color: var(--accent); border-bottom-color: var(--accent); }

.mast-top {
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
}
.mast-id { display: flex; align-items: center; gap: .85rem; flex: 1 1 auto; min-width: 0; }
.mast-id .brand-text { flex: 1 1 auto; min-width: 0; }

.mast-social { display: flex; align-items: center; gap: .55rem; flex: none; }
.mast-social a { display: flex; color: var(--muted); padding: .25rem; }
.mast-social a:hover { color: var(--accent); }
.mast-social svg { width: 21px; height: 21px; display: block; fill: currentColor; }

/* ---------- the "Doctor in the making" artwork ---------- */

/* Black line art on transparency, so dark mode just inverts it to white
   rather than showing a lit-up white panel. */
.mast-logo { width: auto; height: 26px; flex: none; display: block; }

@media (prefers-color-scheme: dark) {
  .mast-logo, .wp-block-site-logo img { filter: invert(1); }
}

/* ---------- shell ---------- */

.shell {
  max-width: var(--shell); margin: 0 auto;
  display: grid; grid-template-columns: var(--rail-w) 1fr;
  gap: 2.4rem; padding: 0 1.5rem;
  align-items: start;
}

.rail {
  position: sticky; top: 1.5rem;
  padding: 1.9rem 0 2rem;
  max-height: calc(100vh - 3rem); overflow-y: auto;
}
.rail h2 {
  font-family: var(--sans); font-size: .69rem; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase; color: var(--muted);
  margin: 0 0 .85rem;
}
.rail ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: .8rem; }
.rail a {
  font-family: var(--sans); font-size: .82rem; line-height: 1.4;
  color: var(--ink-soft); text-decoration: none; display: block;
}
.rail a:hover { color: var(--accent); }
.rail a.on { color: var(--accent); font-weight: 600; }
.rail .d { display: block; font-size: .71rem; color: var(--muted); margin-top: .12rem; }

.main { min-width: 0; padding: 1.9rem 0 3rem; max-width: 68ch; }

/* ---------- home listing ---------- */

.listing { display: flex; flex-direction: column; }
.item + .item { border-top: 1px solid var(--line); margin-top: 2.2rem; padding-top: 2.2rem; }
.item h2 {
  font-family: var(--serif); font-size: 1.5rem; font-weight: 600;
  line-height: 1.25; letter-spacing: -.012em; margin: .1rem 0 .55rem;
  text-wrap: balance;
}
.item h2 a { color: var(--ink); text-decoration: none; }
.item h2 a:hover { color: var(--accent); }

.meta {
  font-family: var(--sans); font-size: .74rem; font-weight: 600;
  letter-spacing: .07em; text-transform: uppercase; color: var(--muted);
  margin: 0;
}

.more {
  font-family: var(--sans); font-size: .84rem; font-weight: 600;
  text-decoration: none; display: inline-block; margin-top: .5rem;
}

/* ---------- single entry ---------- */

.entry-head { margin-bottom: 1.7rem; }
.entry-head h1 {
  font-family: var(--serif); font-size: 2.1rem; font-weight: 600;
  line-height: 1.18; letter-spacing: -.018em; margin: .3rem 0 0;
  text-wrap: balance;
}

.entry p { color: var(--ink-soft); margin: 0 0 1.15rem; }
.entry h2, .entry h3, .entry h4 {
  font-family: var(--serif); font-weight: 600; letter-spacing: -.01em;
  line-height: 1.3; margin: 2.1rem 0 .7rem; color: var(--ink);
  text-wrap: balance;
}
.entry h2 { font-size: 1.4rem; }
.entry h3 { font-size: 1.2rem; }
.entry h4 { font-size: 1.05rem; }
.entry ul, .entry ol { color: var(--ink-soft); padding-left: 1.3rem; margin: 0 0 1.15rem; }
.entry li { margin-bottom: .4rem; }
.entry blockquote {
  margin: 1.5rem 0; padding: .2rem 0 .2rem 1.2rem;
  border-left: 3px solid var(--line); color: var(--muted); font-style: italic;
}
.entry blockquote cite {
  display: block; margin-top: .6rem;
  font-family: var(--sans); font-size: .78rem; font-style: normal;
  letter-spacing: .01em;
}
.entry blockquote cite::before { content: "\2014\00a0"; }
.entry hr, .wp-block-separator {
  border: 0; border-top: 1px solid var(--line); margin: 2.2rem 0;
}

/* WordPress leftovers rendered sanely */
/* `.item` covers the home-page excerpts, which are not wrapped in `.entry`. */
.entry img, .entry figure img, .item img { max-width: 100%; height: auto; display: block; border-radius: 3px; }
.entry figure, .item figure { margin: 1.6rem 0; }
.entry figcaption {
  font-family: var(--sans); font-size: .78rem; color: var(--muted);
  margin-top: .5rem; text-align: center;
}
.wp-block-image { margin: 1.6rem 0; }
.wp-block-buttons { display: flex; flex-wrap: wrap; gap: .6rem; margin: 1.4rem 0; padding: 0; list-style: none; }
.wp-block-button__link {
  font-family: var(--sans); font-size: .87rem; font-weight: 600;
  background: var(--accent); color: #fff; text-decoration: none;
  padding: .55rem 1rem; border-radius: 5px; display: inline-block;
}
.wp-block-button__link:hover { background: var(--accent-lo); color: #fff; }
.wp-block-embed { margin: 1.6rem 0; }
.wp-block-embed__wrapper { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; }
.wp-block-embed__wrapper iframe {
  position: absolute; inset: 0; width: 100%; height: 100%; border: 0; border-radius: 4px;
}
/* Must stay after `.entry img`, which is equally specific and would otherwise win. */
.wp-block-site-logo img { max-width: 140px; height: auto; }

/* ---------- pagers ---------- */

.pager {
  display: flex; gap: 1rem; justify-content: space-between;
  border-top: 1px solid var(--line); margin-top: 2.6rem; padding-top: 1.3rem;
}
.pager a {
  font-family: var(--sans); font-size: .88rem; font-weight: 600;
  text-decoration: none; max-width: 46%; line-height: 1.35;
}
.pager .next { text-align: right; margin-left: auto; }
.pager span {
  display: block; font-size: .7rem; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase; color: var(--muted); margin-bottom: .18rem;
}

.pagination {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  font-family: var(--sans); font-size: .86rem;
  border-top: 1px solid var(--line); margin-top: 2.4rem; padding-top: 1.3rem;
}
.pagination span { color: var(--muted); }
.pagination a { font-weight: 600; text-decoration: none; }

/* ---------- footer ---------- */

.foot {
  border-top: 1px solid var(--line); margin-top: 1rem;
  padding: 1.4rem 1.5rem 2.5rem;
}
.foot p {
  max-width: var(--shell); margin: 0 auto;
  font-family: var(--sans); font-size: .8rem; color: var(--muted);
}
.foot p + p { margin-top: .3rem; }

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  body { font-size: 17px; }
  .shell {
    grid-template-columns: 1fr; gap: 0;
  }
  .main { order: 1; padding-bottom: 2rem; max-width: none; }
  /* Post pages carry their own Previous/Next pager, so dropping the rail
     costs no navigation - and reflowed under the content it put all 24 posts
     at the foot of every page. */
  .rail { display: none; }
  .masthead-inner { padding-top: 1.3rem; }
  .brand { font-size: 1.4rem; }
  .mast-top { gap: 1rem; }
  .mast-social svg { width: 19px; height: 19px; }
  .entry-head h1 { font-size: 1.7rem; }
  .item h2 { font-size: 1.3rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* ---------- phones ---------- */

/* The masthead was most of the first screen on a phone: the brand wrapped to two
   lines and the tagline to three, because the logo and social icons squeeze the
   text into ~170px. Shrink the type, drop the tagline (it stays in <title> and
   the SEO tags) and the whole header fits in one row plus tabs. */
@media (max-width: 640px) {
  .masthead-inner { padding: .9rem 1.1rem 0; }
  .brand { font-size: 1.15rem; letter-spacing: -.01em; }
  .tagline { display: none; }
  .mast-logo { height: 20px; }
  .mast-top { gap: .75rem; }
  .mast-id { gap: .6rem; }
  .mast-social svg { width: 18px; height: 18px; }
  .shell { padding: 0 1.1rem; }

  /* Tabs still scroll sideways; the mask fades the right edge so it is visible
     that there is more than fits. The scrollbar itself is hidden - it rendered
     as a heavy bar under the tabs on iOS. */
  .tabs {
    margin-top: .7rem; scrollbar-width: none;
    -webkit-mask-image: linear-gradient(to right, #000 80%, transparent 98%);
            mask-image: linear-gradient(to right, #000 80%, transparent 98%);
  }
  .tabs::-webkit-scrollbar { display: none; }
  .tabs a { font-size: .85rem; padding: .45rem .6rem; }

  .foot-rss { display: none; }
}