/* ------------------------------------------------------------
   Wanchun Shen — site styles
   One column, one typeface, one accent. Edit the variables
   below to change the whole site's colour or measure.
   ------------------------------------------------------------ */

:root {
  --paper: #ffffff;
  --ink: #232323;
  --ink-soft: #6b6a66;
  --rule: #e5e3de;
  --link: #35597d;
  --link-hover: #1f3d5c;
  --measure: 54rem;
}

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

body {
  margin: 0;
  padding: 0 1.25rem;
  background: var(--paper);
  color: var(--ink);
  font-family: "Newsreader", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  font-size: 1.1875rem;
  line-height: 1.6;
  font-kerning: normal;
  text-rendering: optimizeLegibility;
}

.site {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2.5rem 0 3rem;
}

/* Header ---------------------------------------------------- */

.site-header {
  margin-bottom: 3rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.25rem;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--ink);
}

.site-nav a[aria-current="page"] {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.3em;
}

/* Content --------------------------------------------------- */

main a {
  color: var(--link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  text-decoration-color: rgba(53, 89, 125, 0.45);
}

main a:hover {
  color: var(--link-hover);
  text-decoration-color: currentColor;
}

a:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 3px;
  border-radius: 2px;
}

h1 {
  font-size: 1.85rem;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem;
}

h2 {
  font-size: 1.3rem;
  font-weight: 500;
  line-height: 1.3;
  margin: 2.75rem 0 0.9rem;
}

main > h2:first-child {
  margin-top: 0;
}

p {
  margin: 0 0 1em;
}

sup {
  font-size: 0.75em;
  line-height: 0;
}

.nowrap {
  white-space: nowrap;
}

/* Home page introduction: name and bio beside the photograph on wide
   screens, stacked (name, photo, bio) on narrow ones. */

.intro {
  display: grid;
  grid-template-columns: 1fr;
  column-gap: 3rem;
}

.portrait {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
  margin: 0 0 1.75rem;
}

.contact {
  color: var(--ink-soft);
  margin-bottom: 1.75rem;
}

/* Lists of papers, talks, notes: bullets with a hanging indent */

.entries {
  list-style: disc;
  padding-left: 1.5rem;
  margin: 0 0 1.5rem;
}

.entries li {
  margin: 0 0 0.6rem;
  padding-left: 0.25rem;
}

.entries li::marker {
  color: var(--ink-soft);
}

.entries ul {
  list-style: circle;
  padding-left: 1.5rem;
  margin: 0.35rem 0 0;
}

.entries ul li {
  margin-bottom: 0.35rem;
}

.note {
  display: block;
  color: var(--ink-soft);
  font-size: 0.95em;
  margin-top: 0.15rem;
}

/* Footer ---------------------------------------------------- */

.site-footer {
  margin-top: 4.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.epigraph {
  margin: 0;
}

.epigraph blockquote {
  margin: 0 0 0.5rem;
  font-style: italic;
}

.epigraph blockquote p {
  margin: 0;
}

.epigraph figcaption {
  font-style: normal;
}

/* Wider screens */

@media (min-width: 52rem) {
  .intro {
    grid-template-columns: 1fr 19rem;
    grid-template-rows: auto 1fr;
    align-items: start;
  }

  .intro-heading {
    grid-column: 1;
    grid-row: 1;
  }

  .intro-bio {
    grid-column: 1;
    grid-row: 2;
  }

  .portrait {
    grid-column: 2;
    grid-row: 1 / span 2;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    object-position: 78% 50%;
    margin: 0.35rem 0 0;
  }
}

/* Small screens */

@media (max-width: 30rem) {
  body {
    font-size: 1.0625rem;
  }

  .site {
    padding-top: 1.75rem;
  }

  .site-header {
    margin-bottom: 2.25rem;
  }

  h1 {
    font-size: 1.6rem;
  }
}