/* ============================================================
   Juan Diego Alvarado De Leon — academic site
   ============================================================ */

:root {
  --ink: #1b2028;
  --ink-soft: #454c59;
  --ink-faint: #767d8a;
  --paper: #f5f3ee;
  --paper-alt: #eae6db;
  --line: #d7d2c3;
  --accent: #1f3a5f;
  --accent-soft: #3d5c85;
  --tag-bg: #e3dcc8;
  --max-width: 780px;
  --font-display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --font-serif: "Source Serif 4", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --font-sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
a:hover { border-bottom-color: currentColor; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- header / nav ---------- */

header.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 22px 24px 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 24px;
}

.site-name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.005em;
  color: var(--ink);
  border-bottom: none;
}
.site-name:hover { border-bottom: none; color: var(--accent); }

nav.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

nav.site-nav a {
  color: var(--ink-soft);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
}
nav.site-nav a:hover,
nav.site-nav a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

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

main { padding: 48px 0 40px; }

footer.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding: 26px 0 40px;
  font-family: var(--font-sans);
  font-size: 0.84rem;
  color: var(--ink-faint);
}

footer.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
  justify-content: space-between;
}

footer.site-footer a { color: var(--ink-soft); }

/* ---------- headings / text ---------- */

h1, h2, h3 { line-height: 1.24; color: var(--ink); text-wrap: balance; }
h1 { font-family: var(--font-display); font-weight: 600; font-size: 2.15rem; margin: 0 0 6px; }
h2 {
  font-size: 1.08rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--accent);
  margin: 46px 0 20px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--line);
}
h2:first-child { margin-top: 0; }
h3 { font-family: var(--font-display); font-weight: 600; font-size: 1.08rem; margin: 0 0 2px; }

p { margin: 0 0 16px; }

.tagline {
  font-style: italic;
  color: var(--ink-soft);
  font-size: 1.12rem;
  margin: 0 0 26px;
}

.byline {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  color: var(--ink-faint);
  margin: 0 0 26px;
}

/* ---------- home hero ---------- */

.hero {
  display: flex;
  gap: 34px;
  align-items: flex-start;
  margin-bottom: 8px;
}

.hero-photo {
  flex: 0 0 168px;
  width: 168px;
  height: 210px;
  object-fit: cover;
  border-radius: 3px;
  box-shadow: 0 1px 3px rgba(30,28,26,0.15);
}

.hero-text { flex: 1; min-width: 0; }

@media (max-width: 560px) {
  .hero { flex-direction: column; align-items: center; text-align: center; }
  .hero-photo { flex: 0 0 auto; }
  .tagline { text-align: center; }
}

/* ---------- lists / entries ---------- */

.entry {
  margin-bottom: 22px;
  padding-bottom: 2px;
}

.entry-title {
  font-weight: 600;
  color: var(--ink);
}

.entry-meta {
  font-family: var(--font-sans);
  font-size: 0.86rem;
  color: var(--ink-faint);
  margin-top: 2px;
}

.entry-desc {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 0.97rem;
}

.tag {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: var(--tag-bg);
  border-radius: 3px;
  padding: 3px 9px;
  margin: 0 8px 8px 0;
  vertical-align: middle;
}

.featured {
  background: var(--paper-alt);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 22px 24px;
  margin-bottom: 30px;
}

ul.plain {
  list-style: none;
  margin: 0;
  padding: 0;
}
ul.plain li {
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
}
ul.plain li:last-child { border-bottom: none; }

ul.disc { padding-left: 22px; margin: 0 0 16px; }
ul.disc li { margin-bottom: 6px; color: var(--ink-soft); }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 28px;
}
@media (max-width: 560px) {
  .two-col { grid-template-columns: 1fr; }
}

.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 8px 16px;
  border-radius: 3px;
  border-bottom: 1px solid var(--accent);
}
.btn:hover { background: var(--accent); color: var(--paper); }

.socials {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  margin-top: 10px;
}
.socials a { margin-right: 16px; }

.cv-block { margin-bottom: 40px; }
.cv-note {
  font-family: var(--font-sans);
  font-size: 0.86rem;
  color: var(--ink-faint);
  margin-top: -8px;
}

/* ---------- dark mode ---------- */

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #eae7de;
    --ink-soft: #bfbcb2;
    --ink-faint: #8b8983;
    --paper: #14171c;
    --paper-alt: #1c2027;
    --line: #2c313a;
    --accent: #7fa3d1;
    --accent-soft: #9dbadd;
    --tag-bg: #262b22;
  }
}
:root[data-theme="dark"] {
  --ink: #eae7de;
  --ink-soft: #bfbcb2;
  --ink-faint: #8b8983;
  --paper: #14171c;
  --paper-alt: #1c2027;
  --line: #2c313a;
  --accent: #7fa3d1;
  --accent-soft: #9dbadd;
  --tag-bg: #262b22;
}
.btn:hover { color: var(--paper); }