/* ---------------------------------------------------------------
   Fredie Didier — personal academic site
   Palette: deep petrol blue on warm sand
   --------------------------------------------------------------- */

:root {
  --petrol:        #1f4e5f;
  --petrol-dark:   #163b48;
  --petrol-light:  #2e6b80;
  --sand:          #faf7f2;
  --sand-deep:     #f1ece3;
  --ink:           #1c1b19;
  --ink-soft:      #4a4844;
  --ink-faint:     #6f6c66;
  --rule:          #ddd6ca;

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans:  -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Helvetica, Arial, sans-serif;

  --measure: 46rem;
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--sand);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.125rem;      /* 18px base — deliberately generous */
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* ---------- layout ---------- */

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 1.5rem;
}

main { padding-bottom: 5rem; }

/* ---------- masthead / nav ---------- */

.masthead {
  border-bottom: 1px solid var(--rule);
  background: var(--sand);
}

.masthead .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

.masthead__name {
  font-family: var(--sans);
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
}
.masthead__name:hover { color: var(--petrol); }

.nav {
  display: flex;
  gap: 1.75rem;
  font-family: var(--sans);
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
}

.nav a {
  color: var(--ink-soft);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}
.nav a:hover { color: var(--petrol); }
.nav a[aria-current="page"] {
  color: var(--petrol);
  border-bottom-color: var(--petrol);
  font-weight: 600;
}

/* ---------- hero (home) ---------- */

.hero {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 2.75rem;
  align-items: start;
  padding: 3.5rem 0 2.5rem;
}

.hero__photo {
  width: 190px;
  height: 190px;
  border-radius: 3px;
  object-fit: cover;
  display: block;
  background: var(--sand-deep);
  border: 1px solid var(--rule);
}

.hero h1 {
  font-size: 2.375rem;
  line-height: 1.15;
  margin: -0.35rem 0 0.4rem;
  letter-spacing: -0.015em;
  font-weight: 600;
}

.hero__role {
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--petrol);
  font-weight: 600;
  margin: 0 0 0.25rem;
}

.hero__affil {
  font-family: var(--sans);
  font-size: 0.9375rem;
  color: var(--ink-faint);
  margin: 0 0 1.25rem;
}

/* ---------- inline link list (contact / profiles) ---------- */

.linkrow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  font-family: var(--sans);
  font-size: 0.9375rem;
}

.linkrow a { color: var(--petrol); }

/* ---------- typography ---------- */

h2 {
  font-family: var(--sans);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--petrol);
  margin: 3rem 0 0;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--rule);
}

h3 {
  font-size: 1.1875rem;
  font-weight: 600;
  line-height: 1.35;
  margin: 2rem 0 0.2rem;
}

p { margin: 0 0 1.15rem; }

a { color: var(--petrol); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--petrol-light); }

strong { font-weight: 600; }

.lede { font-size: 1.1875rem; }

/* ---------- research entries ---------- */

.entry { margin-top: 2.25rem; }
.entry:first-of-type { margin-top: 1.75rem; }

.entry__title {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
  margin: 0 0 0.3rem;
}

.entry__authors {
  font-family: var(--sans);
  font-size: 0.9375rem;
  color: var(--ink-faint);
  margin: 0 0 0.5rem;
}

.entry__links {
  font-family: var(--sans);
  font-size: 0.875rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tag {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--petrol);
  background: var(--sand-deep);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 0.15rem 0.5rem;
  vertical-align: 2px;
}

/* ---------- CV page ---------- */

.cv-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0 0;
}

.btn {
  font-family: var(--sans);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--sand);
  background: var(--petrol);
  border: 1px solid var(--petrol);
  border-radius: 3px;
  padding: 0.5rem 1.1rem;
}
.btn:hover { background: var(--petrol-dark); color: var(--sand); }

.btn--ghost { color: var(--petrol); background: transparent; }
.btn--ghost:hover { background: var(--sand-deep); color: var(--petrol-dark); }

/* dated CV rows: title left, date right */
.item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.25rem 1.5rem;
  margin-top: 1.75rem;
}

.item__head { font-size: 1.0625rem; font-weight: 600; line-height: 1.4; margin: 0; }

.item__date {
  font-family: var(--sans);
  font-size: 0.875rem;
  color: var(--ink-faint);
  white-space: nowrap;
  padding-top: 0.28rem;
}

.item__sub {
  grid-column: 1 / -1;
  font-family: var(--sans);
  font-size: 0.9375rem;
  color: var(--petrol);
  margin: 0;
}

.item__body {
  grid-column: 1 / -1;
  font-size: 1rem;
  color: var(--ink-soft);
  margin: 0.35rem 0 0;
}

/* embedded CV PDF viewer */
.pdf-frame {
  margin-top: 2rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--sand-deep);
  overflow: hidden;
}

.pdf-frame object {
  display: block;
  width: 100%;
  height: 88vh;
  min-height: 34rem;
  border: 0;
}

.pdf-fallback {
  margin: 0;
  padding: 2.5rem 1.5rem;
  text-align: center;
  font-size: 1rem;
  color: var(--ink-soft);
}

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

.footer {
  border-top: 1px solid var(--rule);
  margin-top: 4rem;
  padding: 1.75rem 0 3rem;
  font-family: var(--sans);
  font-size: 0.875rem;
  color: var(--ink-faint);
}
.footer p { margin: 0; }

/* ---------- responsive ---------- */

@media (max-width: 640px) {
  body { font-size: 1.0625rem; }

  .masthead .wrap { flex-direction: column; align-items: flex-start; }
  .nav { gap: 1.25rem; flex-wrap: wrap; }

  .hero {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding-top: 2.5rem;
  }
  .hero__photo { width: 150px; height: 150px; }
  .hero h1 { font-size: 1.9375rem; margin-top: 0; }

  .item { grid-template-columns: 1fr; }
  .item__date { padding-top: 0; }

  /* Mobile browsers mostly refuse to render <object> PDFs inline and show a
     blank box instead of the fallback. Hide the embed and let the download
     buttons carry the CV tab on small screens. */
  .pdf-frame { display: none; }
}

/* ---------- print (CV page) ---------- */

@media print {
  body { background: #fff; font-size: 10.5pt; }
  .masthead, .footer, .cv-actions { display: none; }
  a { color: #000; text-decoration: none; }
  h2 { color: #000; margin-top: 1.4rem; }
  .wrap { max-width: none; padding: 0; }
}