/* ===================================================================
   José Elías Durán Roa — academic site
   Classic style: serif type, white background, oxblood accent
   =================================================================== */

:root {
  --ink:    #2a2118;   /* headings */
  --body:   #463c30;   /* body text */
  --muted:  #8c7e6b;   /* metadata */
  --rule:   #e4ddd1;   /* hairlines */
  --accent: #6b2737;   /* oxblood */
  --bg:     #ffffff;
  --bg-alt: #faf7f1;   /* faint warm panel */
  --maxw:   820px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font-family: 'EB Garamond', Georgia, serif;
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ===== NAV ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--rule);
}
.nav-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 600;
  font-size: 21px;
  color: var(--ink);
  letter-spacing: .3px;
}
.brand:hover { text-decoration: none; color: var(--accent); }
.nav-links { display: flex; gap: 22px; flex-wrap: wrap; }
.nav-links a {
  font-size: 15px;
  letter-spacing: .5px;
  color: var(--body);
  text-transform: uppercase;
  font-variant: small-caps;
}
.nav-links a:hover { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--accent); }
.nav-links a.active { color: var(--accent); border-bottom: 2px solid var(--accent); }
.nav { transition: box-shadow .2s ease, background .2s ease; }
.nav.scrolled { box-shadow: 0 4px 18px rgba(42,33,24,.08); }

/* ===== HERO ===== */
.hero {
  padding: 76px 0 64px;
  background:
    radial-gradient(1100px 380px at 78% -8%, rgba(107,39,55,.06), transparent 60%),
    linear-gradient(180deg, var(--bg-alt) 0%, #fff 72%);
  border-bottom: 1px solid var(--rule);
}
.hero-inner {
  max-width: 940px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  gap: 52px;
  align-items: center;
}
.hero-photo { flex: 0 0 auto; }
.portrait {
  display: block;
  width: 300px;
  height: 372px;
  object-fit: cover;
  object-position: 50% 16%;
  border-radius: 18px;
  box-shadow: 0 24px 52px rgba(42,33,24,.28), 0 0 0 8px #fff, 0 0 0 9px var(--rule);
}
.hero-text { flex: 1 1 auto; min-width: 0; }
.eyebrow-h {
  font-family: 'Segoe UI', Roboto, sans-serif;
  font-size: 12px; font-weight: 700; letter-spacing: 2.8px;
  text-transform: uppercase; color: var(--accent);
  margin: 0 0 12px;
}
.hero h1 {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 700;
  font-size: 52px;
  line-height: 1.04;
  color: var(--ink);
  margin: 0 0 8px;
  letter-spacing: .3px;
}
.hero h1 .nick { color: var(--muted); font-weight: 500; font-style: italic; font-size: .62em; }
.role { font-size: 18.5px; color: var(--body); margin: 0 0 18px; }
.role strong { color: var(--ink); font-weight: 600; }
.accent-line { width: 62px; height: 3px; background: var(--accent); border-radius: 3px; margin: 0 0 22px; }
.bio { font-size: 17.5px; line-height: 1.66; color: var(--body); margin: 0 0 14px; max-width: 53ch; }
.bio strong { color: var(--ink); font-weight: 600; }

.links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.lk {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-radius: 10px;
  border: 1px solid var(--rule); background: #fff;
  font-family: 'Segoe UI', Roboto, sans-serif;
  font-size: 14px; font-weight: 600; letter-spacing: .2px; color: var(--ink);
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease, color .16s ease, background .16s ease;
}
.lk svg { width: 16px; height: 16px; stroke-width: 1.7; }
.lk:hover { text-decoration: none; border-color: var(--accent); color: var(--accent); transform: translateY(-2px); box-shadow: 0 8px 18px rgba(42,33,24,.10); }
.lk.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.lk.primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 10px 22px rgba(107,39,55,.32); }

/* ===== BLOCKS ===== */
.block { padding: 30px 0 48px; }
.block.alt { background: var(--bg-alt); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }

.head { text-align: center; margin: 46px 0 26px; }
.head:first-child { margin-top: 10px; }
.head h2 {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 600;
  font-size: 30px;
  letter-spacing: .5px;
  color: var(--ink);
  margin: 0;
}
.head .orn {
  display: block; margin: 8px auto 0; width: 70px;
  border: 0; border-top: 1px solid var(--accent); position: relative;
}
.head .orn::after {
  content: "\2766";
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--bg); padding: 0 8px; color: var(--accent); font-size: 14px;
}
.block.alt .head .orn::after { background: var(--bg-alt); }

/* ===== RESEARCH ENTRIES ===== */
.entry { margin: 0 0 30px; padding-left: 26px; text-indent: -26px; }
.title {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 600; font-size: 23px; line-height: 1.3;
  color: var(--ink); display: inline;
}
.byline { display: block; text-indent: 0; font-size: 17px; color: var(--body); margin: 5px 0 0; }
.byline a { color: var(--accent); border-bottom: 1px solid rgba(107,39,55,.3); }
.byline a:hover { text-decoration: none; border-bottom-color: var(--accent); }
.jel {
  display: block; text-indent: 0; font-size: 14px; letter-spacing: 1px;
  color: var(--muted); margin: 4px 0 0; font-variant: small-caps;
}
.outlet { display: block; text-indent: 0; font-size: 16.5px; color: var(--body); margin: 4px 0 0; }
.abstract {
  display: block; text-indent: 0; font-size: 16px; color: var(--body);
  margin: 9px 0 0; line-height: 1.55; padding-left: 14px;
  border-left: 2px solid var(--rule);
}

.links { display: block; text-indent: 0; margin: 12px 0 0; }
.links a {
  display: inline-block;
  font-size: 14.5px; letter-spacing: .4px;
  color: var(--accent); background: transparent;
  border: 1px solid var(--accent); border-radius: 6px;
  padding: 6px 16px; margin: 7px 9px 0 0;
  transition: background .18s ease, color .18s ease, box-shadow .18s ease;
}
.links a:hover { text-decoration: none; background: var(--accent); color: #fff; box-shadow: 0 2px 8px rgba(107,39,55,.22); }

/* ===== TEACHING ===== */
.lead { text-align: center; color: var(--muted); margin: 0 0 26px; }
.course {
  border: 1px solid var(--rule);
  border-radius: 14px;
  margin: 0 0 16px;
  background: #fff;
  overflow: hidden;
  transition: box-shadow .2s ease, border-color .2s ease;
}
.course[open] { box-shadow: 0 8px 24px rgba(42,33,24,.07); }
.course:hover { border-color: #d8cdba; }
.c-title {
  display: block;
  font-family: 'Cormorant Garamond', serif;
  font-weight: 600; font-size: 22px; color: var(--ink);
}
.c-meta { display: block; font-size: 15.5px; color: var(--muted); margin-top: 3px; }

.term {
  display: block;
  font-variant: small-caps; letter-spacing: .6px;
  font-size: 15.5px; color: var(--accent);
  margin: 16px 0 8px;
}
.lec-list { list-style: none; margin: 0; padding: 0; }
.lec-list li { font-size: 17px; color: var(--body); margin: 0 0 7px; line-height: 1.4; }
.lec-list .n { color: var(--muted); }
.lec-list a { color: var(--accent); border-bottom: 1px solid rgba(107,39,55,.3); }
.lec-list a:hover { text-decoration: none; border-bottom-color: var(--accent); }
.lec-list em { color: var(--muted); font-size: 14.5px; }

.slides { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 0; }
.chip {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 40px; padding: 7px 13px;
  border: 1px solid var(--rule); border-radius: 6px;
  color: var(--accent); font-size: 14.5px; letter-spacing: .3px;
  transition: background .16s ease, color .16s ease, border-color .16s ease;
}
.chip:hover { text-decoration: none; background: var(--accent); color: #fff; border-color: var(--accent); }

/* Course header with university emblem */
summary.course-head { display: flex; align-items: center; gap: 16px; padding: 16px 18px; cursor: pointer; list-style: none; }
summary.course-head::-webkit-details-marker { display: none; }
summary.course-head::marker { content: ""; }
summary.course-head:hover .c-title { color: var(--accent); }
.course-head .ch-info { flex: 1 1 auto; min-width: 0; }
.chev {
  flex: 0 0 auto; width: 9px; height: 9px;
  border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted);
  transform: rotate(45deg); transition: transform .2s ease;
}
.course[open] .chev { transform: rotate(-135deg); }
.course-body { padding: 2px 18px 18px; }
.course-body .term:first-child { margin-top: 8px; }
.uni-badge {
  flex: 0 0 62px; width: 62px; height: 62px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--rule); border-radius: 12px;
  background: #fff; overflow: hidden;
  box-shadow: 0 2px 8px rgba(42,33,24,.07);
}
.uni-badge img { width: 100%; height: 100%; object-fit: contain; padding: 5px; box-sizing: border-box; }
.uni-badge .mono { font-family: 'Cormorant Garamond', serif; font-weight: 700; font-size: 17px; color: var(--accent); letter-spacing: .5px; }
.course-head .c-title, .course-head .c-meta { display: block; }

/* Slides grid with previews */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(212px, 1fr));
  gap: 16px; margin: 14px 0 6px;
}
.slide-card {
  display: flex; flex-direction: column;
  border: 1px solid var(--rule); border-radius: 10px; overflow: hidden;
  background: #fff; color: var(--ink);
  transition: transform .14s ease, box-shadow .16s ease, border-color .16s ease;
}
a.slide-card:hover { text-decoration: none; transform: translateY(-3px); box-shadow: 0 10px 26px rgba(42,33,24,.15); border-color: var(--accent); }
.thumb {
  position: relative; aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, #864252 0%, #6b2737 55%, #571f2c 100%);
  border-bottom: 1px solid var(--rule);
}
.thumb img { position: relative; z-index: 1; width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb-ph {
  display: flex; flex-direction: column;
  position: absolute; inset: 0; z-index: 0;
  align-items: center; justify-content: center;
  color: rgba(255,255,255,.95); font-family: 'Cormorant Garamond', serif;
  font-size: 40px; line-height: 1;
}
.thumb-ph::before {
  content: "LECTURE";
  font-family: 'Segoe UI', sans-serif; font-size: 10px; font-weight: 600;
  letter-spacing: 2.5px; opacity: .75; margin-bottom: 6px;
}
.thumb.noimg img { display: none; }
.cap { padding: 11px 13px 14px; font-size: 14.5px; line-height: 1.36; color: var(--body); }
.cap .n { display: block; font-variant: small-caps; letter-spacing: .5px; color: var(--accent); font-size: 13px; margin-bottom: 2px; }
.slide-card.soon { opacity: .6; }

/* ===== FOOTER ===== */
.footer {
  text-align: center;
  padding: 48px 0 40px;
  border-top: 1px solid var(--rule);
  background: var(--bg);
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
}
.foot-h {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 600; font-size: 26px; color: var(--ink);
  margin: 0 0 14px;
}
.footer a { color: var(--accent); border-bottom: 1px solid rgba(107,39,55,.3); }
.footer a:hover { text-decoration: none; border-bottom-color: var(--accent); }
.footer .sep { color: #cfc6b6; margin: 0 8px; }
.footer .copy { font-size: 14px; color: var(--muted); margin-top: 18px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 720px) {
  body { font-size: 17px; }
  .nav-inner { flex-direction: column; align-items: flex-start; gap: 10px; padding: 12px 20px; }
  .nav-links { gap: 16px; }
  .hero { padding: 44px 0 36px; }
  .hero-inner { flex-direction: column; text-align: center; gap: 28px; }
  .portrait { width: 230px; height: 286px; }
  .accent-line { margin-left: auto; margin-right: auto; }
  .bio { max-width: 100%; }
  .links { justify-content: center; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
  summary.course-head { gap: 12px; }
  .hero h1 { font-size: 40px; }
  .wrap { padding: 0 20px; }
}