/* =========================================================================
   Viviana Rodriguez — personal site
   Design tokens consolidated from the design handoff (.dc.html files).
   ========================================================================= */

:root {
  /* Palette */
  --bg:          #ffffff;
  --ink:         #18181b; /* darkest — headings, strong rules */
  --body:        #27272a; /* body copy */
  --muted:       #52525b;
  --muted-2:     #71717a;
  --link:        #006896; /* default link (teal-blue) */
  --accent:      #940034; /* active nav / maroon */
  --divider:     #e4e4e7; /* light list dividers */
  --btn-border:  #d4d4d8;
  --btn-ink:     #3f3f46;

  /* Type */
  --serif: 'Libertinus Serif', Georgia, serif;
  --mono:  'IBM Plex Mono', monospace;
}

/* ------------------------------------------------------------------ reset */
html, body { margin: 0; background: var(--bg); }
* { box-sizing: border-box; }

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

/* ------------------------------------------------------------------ layout */
.page {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 64px 24px 96px;
}
.page--home { padding-top: 72px; }

main { width: 100%; }
.wrap-narrow { max-width: 600px; }  /* home */
.wrap-wide   { max-width: 720px; }  /* research / teaching */

/* ------------------------------------------------------------------ avatar */
.avatar {
  position: relative;
  width: 132px;
  height: 132px;
  margin: 0 auto 30px;
}
.avatar img {
  width: 132px;
  height: 132px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
}
.avatar__expand {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--btn-border);
  background: var(--bg);
  color: var(--btn-ink);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 3px rgba(15, 15, 20, 0.18);
  z-index: 2;
}

/* --------------------------------------------------------------- masthead */
.name {
  margin: 0;
  text-align: center;
  font-family: var(--serif);
  font-weight: 600;
  color: var(--ink);
}
.name--home { font-size: 40px; letter-spacing: -0.01em; }
.name--sub  { font-size: 27px; letter-spacing: -0.005em; }
.name--sub a { color: var(--ink); }

.tagline {
  margin: 12px 0 0;
  text-align: center;
  font-family: var(--serif);
  font-style: italic;
  font-size: 18px;
  color: var(--muted);
}

/* ------------------------------------------------------------------- nav */
.nav {
  display: flex;
  justify-content: center;
  gap: 30px;
  padding: 13px 0;
  border-top: 0.8px solid var(--ink);
  border-bottom: 0.4px solid var(--muted-2);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.03em;
}
.nav--home { margin: 30px 0; }
.nav--sub  { margin: 22px 0 44px; }
.nav a { color: var(--ink); }
.nav a[aria-current="page"] { color: var(--accent); }

/* ------------------------------------------------------------------- intro */
.intro {
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.62;
  color: var(--body);
  text-align: justify;
}
.intro p { margin: 0 0 0.75em; }
.intro p.indent { text-indent: 0.5cm; }
.intro p:last-child { margin-bottom: 0; }

/* ------------------------------------------------------------------ contact */
.contact {
  margin: 56px 0 0;
  text-align: center;
}
.contact__rule {
  width: 44px;
  height: 0.8px;
  background: var(--ink);
  margin: 0 auto 20px;
}
.contact__email {
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--link);
}
.contact address {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-style: italic;
  font-size: 16px;
  line-height: 1.55;
  color: var(--muted);
}

/* --------------------------------------------------------- section headers */
.section-title {
  margin: 0 0 20px;
  padding-bottom: 8px;
  border-bottom: 0.8px solid var(--ink);
  font-family: var(--serif);
  font-weight: 700;
  font-size: 21px;
  color: var(--ink);
}
.section-title + .section-title,
.section-title.gap { margin-top: 52px; }

/* ---------------------------------------------------------------- research */
.pub {
  margin: 0 0 26px;
  font-family: var(--serif);
  font-size: 17.5px;
  line-height: 1.5;
  color: var(--body);
}
.pub:last-child { margin-bottom: 0; }
.pub a.title { font-weight: 600; }
.pub em { color: var(--muted); }
.pub strong { font-weight: 600; }
.pub .venue { color: var(--muted); font-style: italic; }
.pub .lead { font-weight: 600; color: var(--ink); }

.featured {
  margin-top: 7px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted-2);
}
.featured .label {
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.featured .outlets {
  font-family: var(--serif);
  font-size: 15px;
  font-style: italic;
}

/* ---------------------------------------------------------------- teaching */
.teach-block { margin: 0 0 30px; }
.teach-block:last-of-type { margin-bottom: 0; }
.teach-org {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 10px;
}
.teach-org a { color: var(--muted-2); }

.course-list,
.guest-list {
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--serif);
  font-size: 17.5px;
  line-height: 1.5;
  color: var(--body);
}
.course-list li { padding: 6px 0; border-bottom: 0.4px solid var(--divider); }
.course-list li:last-child { border-bottom: 0; }

.guest-list { line-height: 1.55; }
.guest-list li { padding: 9px 0; border-bottom: 0.4px solid var(--divider); }
.guest-list li:last-child { border-bottom: 0; }
.guest-list strong { font-weight: 600; }
.guest-list .year { color: var(--muted-2); font-style: italic; }

/* ------------------------------------------------------------------ lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(9, 9, 11, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  cursor: zoom-out;
  padding: 48px;
}
.lightbox[hidden] { display: none; }
.lightbox img {
  width: 88vw;
  height: 88vh;
  object-fit: contain;
  box-shadow: 0 10px 50px rgba(0, 0, 0, 0.55);
}

/* ------------------------------------------------------------------ mobile */
@media (max-width: 640px) {
  .page { padding: 48px 20px 72px; }
  .name--home { font-size: 34px; }
  .intro { text-align: left; }
}