/* ============================================================
   ACADEMIC PORTFOLIO — Custom Theme
   Color palette inspired by portrait background:
     teal-blue  #1B6B93   (deep, calm — header, primary, links)
     coral      #E8734A   (warm accent — hover, badges, highlights)
     bg-light   #FAFBFC   (off-white main background)
     bg-alt     #EFF6FB   (light teal-tinted alternating section bg)
     text       #2D3748   (near-black text)
     subtle     #718096   (secondary text, metadata)
     border     #CBD5E0   (borders, dividers)
   Font: Nunito (Google Fonts)
   ============================================================ */

/* ── Reset & base ─────────────────────────────────────────── */
/* Nunito is loaded via <link> in head.html (see partials/head.html) */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-primary:    #1B6B93;
  --color-primary-dk: #134f6e;
  --color-accent:     #E8734A;
  --color-accent-dk:  #c45c38;
  --color-bg:         #FAFBFC;
  --color-bg-alt:     #EFF6FB;
  --color-text:       #2D3748;
  --color-subtle:     #718096;
  --color-border:     #CBD5E0;
  --color-white:      #ffffff;
  --font-family:      'Nunito', 'Segoe UI', system-ui, sans-serif;
  --nav-height:       64px;
  --section-pad:      72px;
  --max-width:        880px;
  --radius:           8px;
  --radius-lg:        16px;
  --shadow-sm:        0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:        0 4px 12px rgba(0,0,0,.10), 0 2px 4px rgba(0,0,0,.06);
  --transition:       0.2s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4 { line-height: 1.25; font-weight: 800; }

img { max-width: 100%; display: block; }

/* ── Navigation ───────────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  padding: 0 24px;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(250, 251, 252, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-brand {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--color-primary);
  white-space: nowrap;
  text-decoration: none;
}
.nav-brand:hover { color: var(--color-accent); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-link {
  display: inline-block;
  padding: 6px 12px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-bg-alt);
}

/* hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius);
}
.nav-toggle:hover { background: var(--color-bg-alt); }
.hamburger {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(160deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
  padding: calc(var(--section-pad) * 1.2) 24px var(--section-pad);
  border-bottom: 1px solid var(--color-border);
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 48px;
}

.hero-photo-wrap {
  flex-shrink: 0;
}

.hero-photo {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 4px solid var(--color-white);
  box-shadow:
    0 0 0 3px var(--color-primary),
    0 12px 32px rgba(27, 107, 147, 0.25),
    0 4px 8px rgba(0,0,0,.10);
}

.hero-name {
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.hero-role {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 4px;
}

.hero-org {
  font-size: 0.95rem;
  color: var(--color-subtle);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.hero-org-icon { font-style: normal; }

/* Social links */
.hero-social {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-white);
  border: 1.5px solid var(--color-border);
  border-radius: 100px;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}
.social-link svg { width: 15px; height: 15px; flex-shrink: 0; }
.social-link:hover {
  color: var(--color-white);
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.social-link--cta {
  color: var(--color-white);
  background: var(--color-accent);
  border-color: var(--color-accent);
}
.social-link--cta:hover {
  background: var(--color-accent-dk);
  border-color: var(--color-accent-dk);
}

.social-link__email { font-size: 0.72em; }

/* ── Sections (shared) ────────────────────────────────────── */
.section        { padding: var(--section-pad) 24px; }
.section--alt   { background: var(--color-bg-alt); }

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 36px;
  padding-bottom: 12px;
  position: relative;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 48px;
  height: 3px;
  background: var(--color-accent);
  border-radius: 2px;
}

.section-empty {
  color: var(--color-subtle);
  font-style: italic;
}

/* ── About ────────────────────────────────────────────────── */
.about-content {
  font-size: 1.05rem;
  max-width: 720px;
}
.about-content p { margin-bottom: 1em; }
.about-content a { font-weight: 700; }

/* ── Publications, Talks, Theses, Projects — shared structure */

/* List containers */
.pub-list,
.talk-list,
.thesis-list,
.project-list    { display: flex; flex-direction: column; }
.pub-list        { gap: 48px; }
.talk-list       { gap: 24px; }
.thesis-list,
.project-list    { gap: 20px; }

/* Entry rows */
.pub-entry,
.talk-entry,
.thesis-entry {
  display: flex;
  gap: 20px;
  border-bottom: 1px solid var(--color-border);
}
.pub-entry    { padding-bottom: 28px; }
.talk-entry   { padding-bottom: 24px; }
.thesis-entry { padding-bottom: 20px; }
.pub-entry:last-child,
.talk-entry:last-child,
.thesis-entry:last-child { border-bottom: none; padding-bottom: 0; }

/* Meta columns (year + badge, right-aligned) */
.pub-meta,
.talk-meta,
.thesis-meta {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  padding-top: 2px;
}
.pub-meta    { width: 96px; }
.talk-meta   { width: 120px; }
.thesis-meta { width: 60px; }

/* Body columns */
.pub-body,
.talk-body,
.thesis-body,
.project-header-text { flex: 1; min-width: 0; }

/* Year / date labels */
.pub-year,
.talk-date,
.thesis-year {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--color-primary);
}
.talk-date { white-space: nowrap; }

/* Type badges */
.pub-type,
.talk-type,
.thesis-type {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 100px;
  white-space: nowrap;
}
.pub-type   { background: var(--color-bg-alt); color: var(--color-subtle); }
.pub-type--conference  { background: #dbeafe; color: #1e40af; }
.pub-type--journal     { background: #dcfce7; color: #166534; }
.pub-type--workshop    { background: #fef9c3; color: #854d0e; }
.pub-type--demo        { background: #ede9fe; color: #5b21b6; }
.pub-type--poster      { background: #fce7f3; color: #9d174d; }
.talk-type  { background: #fef9c3; color: #854d0e; }
.thesis-type { background: #ede9fe; color: #5b21b6; }

/* Award badge */
.pub-award {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 100px;
  text-align: right;
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fbbf24;
}
.pub-award::before { content: "🏆 Award"; }

/* Entry titles */
.pub-title,
.talk-title,
.thesis-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}
.pub-title { line-height: 1.4; }
.pub-title a,
.thesis-title a { color: var(--color-text); }
.pub-title a:hover,
.thesis-title a:hover { color: var(--color-accent); }

/* Venue / event subtitles */
.pub-venue,
.talk-event {
  font-size: 0.88rem;
  color: var(--color-subtle);
  margin-bottom: 8px;
}

/* ── Publications ─────────────────────────────────────────── */
.pub-authors {
  font-size: 0.9rem;
  color: var(--color-subtle);
  margin-bottom: 2px;
}
/* Bold the owner's name */
.pub-authors strong { color: var(--color-text); font-weight: 700; }

.pub-abstract { background: #e0f2fe; border-radius: 4px; transition: filter var(--transition); }
.pub-abstract:not([open]):hover { filter: brightness(0.88); }
.pub-link--abstract { background: transparent; color: #0369a1; display: block; list-style: none; cursor: pointer; }
.pub-link--abstract::-webkit-details-marker { display: none; }
.pub-link--abstract:hover { filter: none; transform: none; }
.pub-abstract[open] { flex-basis: 100%; }
.pub-abstract p {
  font-size: 0.88rem;
  color: #0c4a6e;
  margin: 0;
  padding: 2px 10px 6px;
}

.pub-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }

.pub-link {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.78rem;
  font-weight: 700;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: all var(--transition);
  text-decoration: none;
}
.pub-link--doi    { background: #dbeafe; color: #1e40af; }
.pub-link--pdf    { background: #fee2e2; color: #991b1b; }
.pub-link--slides { background: #fef9c3; color: #854d0e; }
.pub-link--code   { background: #dcfce7; color: #166534; }
.pub-link--arxiv  { background: #ede9fe; color: #5b21b6; }
.pub-link--video  { background: #fce7f3; color: #9d174d; }
.pub-link:hover   { filter: brightness(0.88); transform: translateY(-1px); color: inherit; }

/* ── Talks ────────────────────────────────────────────────── */
.talk-links { display: flex; flex-wrap: wrap; gap: 8px; }

/* ── Projects ─────────────────────────────────────────────── */
.project-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.project-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.project-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 10px;
}

.project-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 4px;
}
.project-name a { color: var(--color-text); }
.project-name a:hover { color: var(--color-accent); }

.project-meta {
  font-size: 0.85rem;
  color: var(--color-subtle);
  display: flex;
  align-items: center;
  gap: 6px;
}
.project-role { font-weight: 700; color: var(--color-primary); }
.project-sep  { color: var(--color-border); }

.project-link-icon {
  flex-shrink: 0;
  color: var(--color-subtle);
  transition: color var(--transition);
  margin-top: 2px;
}
.project-link-icon svg { width: 18px; height: 18px; display: block; }
.project-link-icon:hover { color: var(--color-primary); }

.project-desc {
  font-size: 0.92rem;
  color: var(--color-text);
  line-height: 1.65;
  margin-bottom: 14px;
}

.project-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.project-tag {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 3px 10px;
  border-radius: 100px;
  background: var(--color-bg-alt);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

/* ── Theses — specific ────────────────────────────────────── */
.thesis-student {
  font-size: 0.88rem;
  color: var(--color-subtle);
}
.thesis-student-label { font-weight: 700; color: var(--color-text); }
.thesis-student strong { color: var(--color-text); font-weight: 700; }

.thesis-institution,
.thesis-cosup {
  font-size: 0.85rem;
  color: var(--color-subtle);
}

/* ── Service & CV — subgroup headings ────────────────────── */
.service-group-title,
.cv-group-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

/* ── Service ──────────────────────────────────────────────── */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 32px 48px;
}

.service-list { list-style: none; display: flex; flex-direction: column; gap: 6px; }

.service-entry {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 8px;
  font-size: 0.9rem;
}
.service-role {
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
}
.service-venue {
  color: var(--color-subtle);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.service-years {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}

/* ── CV ───────────────────────────────────────────────────── */
.cv-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px 56px;
  margin-bottom: 32px;
}

.cv-left,
.cv-right {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.cv-list { list-style: none; display: flex; flex-direction: column; gap: 16px; }

.cv-entry {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 12px;
}

.cv-entry-period {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-accent);
  padding-top: 2px;
  white-space: nowrap;
}

.cv-entry-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
  display: block;
  margin-bottom: 2px;
}

.cv-entry-institution {
  font-size: 0.88rem;
  color: var(--color-subtle);
  display: block;
}

.cv-entry-location {
  font-size: 0.82rem;
  color: var(--color-subtle);
  display: block;
}

.cv-entry-desc {
  font-size: 0.88rem;
  color: var(--color-subtle);
  margin-top: 4px;
}

.cv-download { display: flex; justify-content: flex-start; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-white);
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
  box-shadow: var(--shadow-md);
}
.btn-primary:hover {
  background: var(--color-primary-dk);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(27, 107, 147, 0.3);
}

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
  background: var(--color-primary);
  color: rgba(255,255,255,0.7);
  padding: 32px 24px;
  margin-top: 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: center;
  font-size: 0.88rem;
}

.site-footer a { color: rgba(255,255,255,0.85); }
.site-footer a:hover { color: var(--color-accent); }

/* ── Responsive ─────────────────────────────────────────────*/
@media (max-width: 640px) {
  :root { --section-pad: 48px; }

  .nav-toggle { display: flex; }

  .pub-sidebar { display: none; }

  .nav-menu {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 8px 0 16px;
    box-shadow: var(--shadow-md);
  }
  .nav-menu.open { display: flex; }
  .nav-link { padding: 10px 24px; border-radius: 0; }

  .hero-inner {
    flex-direction: column;
    text-align: center;
    gap: 24px;
  }
  .hero-photo { width: 140px; height: 140px; }
  .hero-social { justify-content: center; }
  .hero-org { justify-content: center; }

  .pub-entry, .talk-entry, .thesis-entry {
    flex-direction: column;
    gap: 6px;
  }
  .pub-meta, .talk-meta, .thesis-meta {
    flex-direction: row;
    align-items: center;
    width: unset;
  }
  .pub-award::before { content: "🏆 " attr(title); }

  .service-grid  { grid-template-columns: 1fr; }
  .cv-layout     { grid-template-columns: 1fr; }

  .cv-entry {
    grid-template-columns: 1fr;
    gap: 2px;
  }
  .cv-entry-period { padding-top: 0; }

  .service-entry {
    grid-template-columns: 1fr;
    gap: 2px;
  }
  .service-venue { white-space: normal; }
}

@media (max-width: 480px) {
  .hero-name { font-size: 1.8rem; }
}

/* ── Buttons ─────────────────────────────────────────────────*/
.btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: 6px;
  font-family: var(--font-family);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.btn--outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}
.btn--outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.section-cta {
  margin-top: 32px;
  text-align: center;
}

/* ── Full Publications Page ──────────────────────────────────*/
.page-main {
  padding-top: calc(var(--nav-height) + 48px);
  padding-bottom: 80px;
  padding-left: 24px;
  padding-right: 24px;
  min-height: 100vh;
  background: var(--color-bg);
}
.page-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}
.page-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 48px;
}
.publications-layout {
  display: flex;
  gap: 40px;
  align-items: flex-start;
}
.pub-sidebar {
  flex: 0 0 200px;
  position: sticky;
  top: calc(var(--nav-height) + 48px);
}
.pub-main {
  flex: 1 1 auto;
  min-width: 0;
}
.pub-filter-panel {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
}
.pub-filter-panel > summary {
  display: none;
}
.pub-filter-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.pub-filter-clear {
  background: none;
  border: none;
  padding: 0;
  font-family: var(--font-family);
  font-size: 0.8rem;
  color: var(--color-subtle);
  cursor: pointer;
  text-align: left;
  text-decoration: underline;
}
.pub-filter-clear:hover { color: var(--color-primary); }
.pub-filter-fieldset {
  border: none;
  padding: 0;
  margin: 0;
  min-width: 0;
}
.pub-filter-fieldset legend {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-subtle);
  margin-bottom: 8px;
}
.pub-filter-label {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.85rem;
  color: var(--color-text);
  cursor: pointer;
  padding: 2px 0;
}
.pub-filter-label input { cursor: pointer; accent-color: var(--color-primary); }
.pub-year-group {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.pub-year-group[hidden],
.pub-entry[hidden] {
  display: none;
}
.pub-no-results {
  color: var(--color-subtle);
  font-style: italic;
}
.pub-no-results[hidden] { display: none; }
.pub-year-heading {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-subtle);
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 8px;
  margin-bottom: 20px;
}