/* ------------------------------------------------------------------
   Academic site
     · Typography  — Fjalla One + Libre Franklin  (christiankwolf.com)
     · Hero photo  — large rectangular portrait    (joelflynn.com)
     · Paper icons — small journal thumbnails       (brunopellegrino.com)

   ALMOST EVERYTHING you'd want to tweak is in the :root block below.
   Change a number, save, refresh. No need to hunt through the file.
   ------------------------------------------------------------------ */

:root {
  /* ---- Fonts (loaded from Google Fonts in each .html <head>) ---- */
  --font-head: "Fjalla One", "Libre Franklin", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: "Libre Franklin", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* ---- Colors ---- */
  --text: #1a1a1a;
  --muted: #555;
  --link: #1a5fb4;          /* accent / link color — change to re-theme */
  --link-hover: #0b3d91;
  --border: #e4e4e4;
  --bg: #ffffff;
  --badge-bg: #f4f4f4;

  /* ---- Layout ---- */
  --max-width: 880px;

  /* ---- Hero photo (joelflynn.com = large rectangle, not a circle) ----
     --photo-max-width : how wide the photo can get (px)
     --photo-aspect    : "auto" keeps the photo's real shape.
                         Set e.g. "3 / 2" for a wide landscape banner
                         (it will crop to fill — see object-position below).
     --photo-radius    : corner rounding (0 = sharp corners)              */
  --photo-max-width: 440px;
  --photo-aspect: auto;
  --photo-radius: 8px;

  /* ---- Paper thumbnail / journal icon (brunopellegrino.com) ---- */
  --thumb-width: 104px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- Layout ---------- */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 24px 80px;
}

/* ---------- Top navigation ---------- */

nav.topnav {
  border-bottom: 1px solid var(--border);
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
}

nav.topnav ul {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  font-size: 14px;
  letter-spacing: 0.02em;
}

nav.topnav a {
  color: var(--text);
  font-family: var(--font-head);
  text-transform: uppercase;
  font-weight: 400;
  letter-spacing: 0.04em;
}

nav.topnav a.active,
nav.topnav a:hover { color: var(--link); text-decoration: none; }

/* ---------- Hero / header ---------- */

header.hero {
  text-align: center;
  padding: 40px 0 28px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 36px;
}

header.hero h1 {
  font-family: var(--font-head);
  font-size: 42px;
  letter-spacing: 0.04em;
  font-weight: 400;
  margin: 0 0 8px;
  text-transform: uppercase;
}

header.hero .title {
  font-size: 16px;
  color: var(--muted);
  margin: 4px 0 16px;
}

header.hero .affiliation {
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 16px;
}

header.hero .contact {
  font-size: 14px;
  color: var(--muted);
  margin-top: 14px;
}

header.hero .contact span { margin: 0 6px; }

header.hero .socials {
  margin-top: 16px;
  display: flex;
  justify-content: center;
  gap: 14px;
}

header.hero .socials a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text);
}
header.hero .socials a:hover {
  border-color: var(--link);
  color: var(--link);
}

/* Large rectangular portrait, joelflynn.com style.
   Shape & size are controlled by --photo-* variables in :root. */
header.hero .portrait {
  display: block;
  width: 100%;
  max-width: var(--photo-max-width);
  aspect-ratio: var(--photo-aspect);
  object-fit: cover;
  object-position: center 30%;   /* keeps faces in frame if the photo is cropped */
  margin: 0 auto 24px;
  border: 1px solid var(--border);
  border-radius: var(--photo-radius);
}

/* ---------- Section headings ---------- */

h2.section {
  font-family: var(--font-head);
  font-size: 22px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 400;
  margin: 44px 0 18px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--text);
}

h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 6px;
}

/* ---------- Paper entries ---------- */

.paper {
  display: grid;
  grid-template-columns: var(--thumb-width) 1fr;
  gap: 22px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.paper:last-child { border-bottom: none; }

/* Small "journal icon" thumbnail next to each paper (brunopellegrino.com).
   Drop a small image into images/ and set "thumb" on the paper in
   content.json. With no thumb, a tidy placeholder is shown instead. */
.paper .thumb {
  width: var(--thumb-width);
}

.paper .thumb img {
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 4px;
  display: block;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.07);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.paper .thumb a:hover img {
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.14);
  transform: translateY(-1px);
}

.paper .thumb.placeholder {
  width: var(--thumb-width);
  aspect-ratio: 8.5 / 11;
  background: #fafafa;
  border: 1px solid var(--border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10.5px;
  color: #b0b0b0;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.paper .title {
  font-weight: 600;
  font-size: 16px;
}

.paper .authors {
  font-size: 14px;
  color: var(--muted);
  margin: 4px 0;
}

.paper .venue {
  font-size: 14px;
  font-style: italic;
  color: var(--muted);
  margin-bottom: 6px;
}

.paper .abstract {
  font-size: 14.5px;
  margin: 10px 0;
}

.paper .links {
  font-size: 13.5px;
  margin-top: 8px;
}

.paper .links a { margin-right: 12px; }

.paper .badges {
  margin: 8px 0 4px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.paper .badge {
  font-size: 11.5px;
  background: var(--badge-bg);
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 3px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Awards: longer "Prize Name — description, year" honors, rendered
   as inline star+text rows that wrap gracefully. Distinct from the
   short pill `.badge` style above. */
.paper .awards {
  margin: 10px 0 4px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.paper .award {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13.5px;
  line-height: 1.5;
}

.paper .award-icon {
  color: #b8902a;
  flex-shrink: 0;
  display: inline-flex;
  transform: translateY(1px);
}

.paper .award-title {
  font-weight: 600;
  color: var(--text);
}

.paper .award-desc {
  color: var(--muted);
}

.paper .presentations {
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 8px;
  line-height: 1.5;
}

.paper .presentations b { color: var(--text); font-weight: 600; }

/* ---------- Teaching list ---------- */

.teaching-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.teaching-item:last-child { border-bottom: none; }
.teaching-item .course-title { font-weight: 600; font-size: 15.5px; }
.teaching-item .course-meta { font-size: 14px; color: var(--muted); }
.teaching-item .course-desc { font-size: 14px; margin-top: 4px; }

/* ---------- Favourites (papers & quotes by category) ---------- */

.fav-intro {
  color: var(--muted);
  font-size: 15px;
  margin: 0 0 8px;
}

.fav-category {
  margin: 34px 0 8px;
}

.fav-cat-name {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 400;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text);
  margin: 0 0 14px;
  padding-bottom: 5px;
  border-bottom: 1px solid var(--border);
}

.fav-papers {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
}

.fav-paper {
  padding: 9px 0;
  border-bottom: 1px dotted var(--border);
}
.fav-paper:last-child { border-bottom: none; }

.fav-cite { font-size: 14.5px; }

.fav-note {
  font-size: 13px;
  color: var(--muted);
  margin-top: 3px;
}

.fav-quotes {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 14px 0 6px;
}

.fav-quote {
  margin: 0;
  border-left: 3px solid var(--border);
  padding: 2px 0 2px 16px;
}

.fav-quote blockquote {
  margin: 0;
  font-style: italic;
  font-size: 15px;
  color: var(--text);
}

.fav-source {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  font-style: normal;
  color: var(--muted);
}

/* ---------- Footer ---------- */

footer {
  text-align: center;
  padding: 30px 0 20px;
  font-size: 12.5px;
  color: #888;
  border-top: 1px solid var(--border);
  margin-top: 48px;
}

/* ---------- Responsive ---------- */

@media (max-width: 640px) {
  :root { --thumb-width: 76px; }
  .paper { grid-template-columns: var(--thumb-width) 1fr; gap: 14px; }
  header.hero h1 { font-size: 30px; }
  header.hero .portrait { max-width: 280px; }
  nav.topnav ul { gap: 14px; font-size: 13px; padding: 12px 16px; }
  .container { padding: 24px 16px 60px; }
}

/* ---------- Reading progress bar ---------- */

.progress-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--link);
  width: 0%;
  z-index: 200;
  pointer-events: none;
  transition: width 0.08s linear;
}

/* ---------- Scroll-triggered reveals ---------- */

.fade-in-up {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}
.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Password gate ---------- */

#pw-gate {
  position: fixed;
  inset: 0;
  background: #0f1923;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.65s ease;
}
#pw-gate.out { opacity: 0; pointer-events: none; }

.pw-box {
  text-align: center;
  width: 100%;
  max-width: 320px;
  padding: 0 1.5rem;
}

.pw-monogram {
  font-family: var(--font-head);
  font-size: 2.4rem;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-indent: 0.22em;
  color: #ffffff;
  text-transform: uppercase;
}

.pw-rule {
  width: 24px;
  height: 1px;
  background: var(--link);
  margin: 1.2rem auto 1.5rem;
}

.pw-subtitle {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.3);
  margin-bottom: 1.75rem;
}

.pw-input {
  display: block;
  width: 100%;
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 4px;
  font-size: 1rem;
  color: #ffffff;
  text-align: center;
  letter-spacing: 0.04em;
  outline: none;
  transition: border-color 0.2s;
  font-family: var(--font-body);
  -webkit-appearance: none;
}
.pw-input::placeholder { color: rgba(255, 255, 255, 0.18); }
.pw-input:focus { border-color: rgba(26, 95, 180, 0.65); }
.pw-input.shake { animation: pw-shake 0.45s ease; }

@keyframes pw-shake {
  0%, 100% { transform: translateX(0); }
  15%       { transform: translateX(-9px); }
  30%       { transform: translateX(8px); }
  50%       { transform: translateX(-7px); }
  70%       { transform: translateX(5px); }
  85%       { transform: translateX(-3px); }
}

.pw-btn {
  display: block;
  width: 100%;
  margin-top: 0.85rem;
  padding: 0.85rem;
  background: var(--link);
  color: #ffffff;
  border: none;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s;
  font-family: var(--font-body);
}
.pw-btn:hover { background: var(--link-hover); }

.pw-error {
  min-height: 1.2em;
  font-size: 0.75rem;
  color: #fca5a5;
  margin-top: 0.75rem;
  letter-spacing: 0.02em;
}

.pw-remember {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.24);
  margin-top: 0.9rem;
  cursor: pointer;
  user-select: none;
}
.pw-remember input { cursor: pointer; accent-color: var(--link); }

/* ---------- Abstract toggle ---------- */

.abstract-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12.5px;
  font-family: var(--font-body);
  color: var(--link);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  margin-top: 8px;
  letter-spacing: 0.01em;
  transition: color 0.15s;
}
.abstract-toggle:hover { color: var(--link-hover); }
.abstract-toggle svg { transition: transform 0.28s ease; flex-shrink: 0; }
.abstract-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }

.abstract-body {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.38s ease;
}
.abstract-body .abstract { margin-top: 10px; }

/* ---------- Nav shadow on scroll ---------- */

nav.topnav { transition: box-shadow 0.25s ease; }
nav.topnav.scrolled { box-shadow: 0 2px 14px rgba(0, 0, 0, 0.08); }

/* ---------- Portrait fade-in ---------- */

header.hero .portrait {
  opacity: 0;
  transition: opacity 0.6s ease;
}
header.hero .portrait.loaded { opacity: 1; }
