/* Shared styles for jmrludan.com (Home, Research, CV, 404).
   The Demos page carries its own styles. */

@font-face {
  font-family: "Source Serif 4";
  src: url("/assets/fonts/source-serif-4-var.woff2") format("woff2");
  font-weight: 200 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("/assets/fonts/ibm-plex-sans-var.woff2") format("woff2");
  font-weight: 100 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("/assets/fonts/ibm-plex-sans-italic-var.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("/assets/fonts/ibm-plex-mono-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("/assets/fonts/ibm-plex-mono-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

:root {
  --paper: #fbfbf9;
  --ink: #16202e;
  --muted: #5b6573;
  --rule: #e2e5e9;
  --link: #1d5fae;
  --badge-bg: #e8eef7;
  --badge-fg: #1d4f8f;
  --figure-bg: #ffffff;
  --f-display: "Source Serif 4", "Source Serif Pro", Georgia, "Times New Roman", serif;
  --f-body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #12171d;
    --ink: #e6eaf0;
    --muted: #9aa5b3;
    --rule: #29313b;
    --link: #86b4f7;
    --badge-bg: #1d2a3d;
    --badge-fg: #a9c8f5;
    --figure-bg: #f4f5f2;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; border-radius: 3px; }
h1, h2, h3 { text-wrap: balance; }

.wrap {
  max-width: 820px;
  margin: 0 auto;
  padding-inline: 20px;
  padding-block: 0 48px;
  display: grid;
  gap: 44px;
}
@media (min-width: 720px) { .wrap { padding-inline: 32px; } }

/* Navigation */
.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 22px;
  padding-block: 18px 14px;
  border-bottom: 1px solid var(--rule);
}
.site-nav .brand {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-right: auto;
}
.site-nav .brand:hover { text-decoration: none; }
.site-nav .nav-link {
  color: var(--muted);
  font-size: 15px;
  padding-block: 2px;
  border-bottom: 2px solid transparent;
}
.site-nav .nav-link:hover { color: var(--ink); text-decoration: none; }
.site-nav .nav-link.active { color: var(--ink); border-bottom-color: var(--link); }
@media (max-width: 520px) { .site-nav .brand { flex-basis: 100%; margin-bottom: 4px; } }

/* Section labels */
.label {
  font-family: var(--f-mono);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}

/* Home: intro */
.hero { display: grid; gap: 22px; align-items: start; }
@media (min-width: 640px) { .hero { grid-template-columns: 168px 1fr; gap: 36px; } }
.hero .photo {
  width: 168px;
  aspect-ratio: 924 / 963;
  object-fit: cover;
  border-radius: 6px;
  display: block;
}
.hero > div { min-width: 0; display: grid; gap: 12px; }
.hero h1 {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(34px, 5vw, 46px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0;
}
.hero .role { margin: 0; font-family: var(--f-mono); font-size: 13px; color: var(--muted); letter-spacing: 0.02em; }
.hero .bio { margin: 0; font-size: 17px; max-width: 62ch; }
.hero .contact { margin: 0; display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 15px; }

/* Dated lists: news, experience, education, course projects */
.dated { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.dated li { display: grid; grid-template-columns: 92px 1fr; gap: 16px; min-width: 0; }
.dated .when {
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--muted);
  padding-top: 2px;
  font-variant-numeric: tabular-nums;
}
.dated li > div { min-width: 0; }
.dated p { margin: 0; }
.dated .what { font-weight: 600; }
.dated .where { color: var(--muted); }
.dated .detail { color: var(--muted); font-size: 15px; margin-top: 2px; }
.dated .meta { margin-top: 2px; }
.dated.spaced { gap: 14px; }
@media (max-width: 480px) { .dated li { grid-template-columns: 1fr; gap: 0; } }

/* Publications */
.pubs { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.pubs li { display: grid; grid-template-columns: 52px 1fr; gap: 16px; min-width: 0; }
.pubs .yr { font-family: var(--f-mono); font-size: 13px; color: var(--muted); padding-top: 3px; }
.pubs li > div { min-width: 0; display: grid; gap: 3px; }
.ptitle { font-family: var(--f-display); font-size: 18px; font-weight: 600; line-height: 1.3; color: var(--ink); }
.authors { margin: 0; font-size: 14px; color: var(--muted); }
.authors b { color: var(--ink); font-weight: 600; }
.meta { margin: 0; display: flex; flex-wrap: wrap; gap: 4px 14px; align-items: center; font-size: 14px; }
.badge {
  font-family: var(--f-mono);
  font-size: 12px;
  background: var(--badge-bg);
  color: var(--badge-fg);
  padding: 1px 7px;
  border-radius: 4px;
}

/* Research page */
.page-head h1 {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(32px, 4.5vw, 42px);
  line-height: 1.1;
  margin: 0 0 6px;
}
.page-head p { margin: 0; color: var(--muted); }
.rpubs { list-style: none; margin: 0; padding: 0; display: grid; }
.rpubs li {
  display: grid;
  gap: 14px 24px;
  padding-block: 20px;
  border-bottom: 1px solid var(--rule);
  min-width: 0;
}
.rpubs li:first-child { padding-top: 0; }
@media (min-width: 640px) { .rpubs li { grid-template-columns: 200px 1fr; } }
.rpubs .thumb { position: relative; display: block; max-width: 280px; }
.rpubs .thumb img {
  width: 100%;
  display: block;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: var(--figure-bg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 6px;
}
.rpubs .thumb.video img { object-fit: cover; padding: 0; }
.rpubs .thumb .play {
  position: absolute;
  left: 10px;
  bottom: 10px;
  font: 500 12px var(--f-mono);
  color: #fff;
  background: rgba(10, 16, 24, 0.82);
  padding: 3px 8px;
  border-radius: 4px;
}
.rpubs li > div { min-width: 0; display: grid; gap: 4px; align-content: start; }

/* CV page */
.cv-link { display: block; }
.cv-img {
  display: block;
  width: 100%;
  max-width: 820px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: #fff;
}

/* 404 */
.notfound { display: grid; gap: 12px; }
.notfound h1 { font-family: var(--f-display); font-weight: 600; font-size: clamp(32px, 4.5vw, 42px); margin: 0; }
.notfound p { margin: 0; color: var(--muted); }

footer.site-foot {
  border-top: 1px solid var(--rule);
  padding-top: 16px;
  font-size: 13px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  justify-content: space-between;
}