/* =========================
   Reset
========================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* =========================
   Global
========================= */
:root {
  --navy: #0B2A45;
  --orange: #BF5700;
  --orange-light: #FFA61A;
  --bg: #F7F5F2;
  --text: #333333;
  --muted: #666666;
  --border: #E7E1D8;
  --border-dark: #DDD6CB;
  --card: #FCFBF9;
  --footer: #646469;
  --white: #FFFFFF;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Quicksand', sans-serif;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  overflow-x: hidden;
}

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

.container {
  width: min(92%, 1000px);
  margin: 0 auto;
}

/* =========================
   Header / Hero
========================= */
header {
  background-color: var(--navy);
  color: var(--bg);
  padding: 1.25rem 0;
}

.header-grid {
  display: grid;
  grid-template-columns: 190px 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.profile-pic {
  display: flex;
  justify-content: center;
}

.profile-pic img {
  width: 180px;
  border-radius: 50%;
  border: 3px solid var(--bg);
}

.profile-info h1 {
  font-family: 'Nunito', sans-serif;
  font-size: 1.65rem;
  margin-bottom: 0.5rem;
  color: var(--orange);
  line-height: 1.2;
}

.profile-info p {
  margin-bottom: 0.65rem;
  font-size: 1rem;
}

.profile-info a {
  color: var(--orange);
  text-decoration: none;
  font-weight: 600;
}

.profile-info a:hover {
  color: var(--orange-light);
  text-decoration: underline;
}

/* =========================
   Navbar
========================= */
.navbar {
  background: var(--navy);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0.45rem 0;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  width: min(92%, 1000px);
  margin: 0 auto;
}

.nav-logo,
.nav-logo-hero {
  font-family: 'Nunito', sans-serif;
  font-weight: 700;
  text-decoration: none;
  font-size: 1.65rem;
  line-height: 1.1;
}

.nav-logo {
  color: var(--bg);
}

.nav-logo-hero {
  color: var(--orange);
  background-color: var(--bg);
  border-radius: 4px;
  padding: 6px 12px;
}

.nav-menu {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
}

.nav-item {
  margin-left: 0;
}

.nav-link {
  display: inline-block;
  font-family: 'Nunito', sans-serif;
  font-weight: 600;
  color: var(--bg);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 4px;
  transition: color 0.2s ease-in-out, background-color 0.2s ease-in-out;
}

.nav-link:hover {
  color: var(--orange);
}

.nav-link.active {
  color: var(--orange);
  background-color: var(--bg);
}

/* =========================
   Main Content
========================= */
main {
  padding: 2rem 0;
}

main h1,
main h2,
main h3 {
  font-family: 'Nunito', sans-serif;
}

main h2 {
  font-size: 1.6rem;
  margin-bottom: 0.75rem;
  color: var(--orange);
  line-height: 1.2;
}

main h3 {
  line-height: 1.2;
}

main p,
main li {
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

section + section {
  margin-top: 1.5rem;
}

a {
  word-break: break-word;
}

/* =========================
   Footer
========================= */
footer {
  background-color: var(--footer);
  color: var(--bg);
  text-align: center;
  padding: 1rem 0;
  font-size: 0.9rem;
}

/* =========================
   BibTeX / Publications
========================= */
.bibtex_template {
  display: none;
}

.bibtex_display {
  counter-reset: pub-counter;
}

.bibtexentry {
  counter-increment: pub-counter;
  position: relative;
  padding-left: 1.9rem;
  margin-bottom: 1.15rem;
}

.bibtexentry::before {
  content: attr(data-number) ".";
  position: absolute;
  left: 0;
  top: 0.1rem;
  font-weight: 700;
  color: var(--text);
}

.pub-title {
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 0.1rem;
  line-height: 1.35;
}

.pub-authors {
  font-size: 0.9rem;
  letter-spacing: 0.1px;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pub-venue {
  font-size: 0.9rem;
  margin: 0;
  color: var(--text);
  font-style: italic;
}

.pub-links {
  margin: 0.1rem 0 0;
  font-size: 0.85rem;
}

.pub-links a {
  margin-right: 0.35rem;
  text-decoration: none;
  color: #F05023;
}

.pub-links a:hover {
  text-decoration: underline;
}

/* =========================
   Research Page
========================= */
.research-page {
  padding-top: 2rem;
  padding-bottom: 3rem;
}

.research-intro {
  margin-bottom: 2.25rem;
}

.research-intro h1 {
  font-size: 2rem;
  color: var(--navy);
  margin-bottom: 0.75rem;
  line-height: 1.15;
}

.research-intro p {
  font-size: 1rem;
  max-width: 900px;
  margin-bottom: 0;
}

.research-topic {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 2px 8px rgba(11, 42, 69, 0.05);
}

.research-topic h2 {
  margin-bottom: 1rem;
}

.topic-layout {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

.topic-layout.reverse {
  grid-template-columns: 1fr 1.4fr;
}

.topic-layout.reverse .topic-text {
  order: 2;
}

.topic-layout.reverse .topic-figure {
  order: 1;
}

.topic-text p {
  font-size: 0.96rem;
  margin-bottom: 0;
}

.topic-figure {
  margin: 0;
  background: var(--white);
  border: 1px solid var(--border-dark);
  border-radius: 12px;
  padding: 0.75rem;
  text-align: center;
}

.topic-figure img {
  width: 100%;
  max-width: 340px;
  margin: 0 auto;
  border-radius: 8px;
}

.topic-figure figcaption {
  font-size: 0.85rem;
  color: #555555;
  margin-top: 0.65rem;
  line-height: 1.5;
}

.figure-credit {
  color: var(--muted);
}

.figure-credit a {
  color: var(--orange);
  text-decoration: none;
  font-weight: 600;
}

.figure-credit a:hover {
  text-decoration: underline;
}

.topic-links {
  margin-top: 1.2rem;
  padding-top: 1rem;
  border-top: 1px solid #E5DED4;
}

.topic-links h3 {
  font-size: 1.05rem;
  color: var(--navy);
  margin-bottom: 0.65rem;
}

.topic-links ul {
  margin: 0;
  padding-left: 1.2rem;
}

.topic-links li {
  margin-bottom: 0.55rem;
}

.topic-links a {
  color: var(--orange);
  text-decoration: none;
  font-weight: 600;
}

.topic-links a:hover {
  text-decoration: underline;
}

.paper-note {
  color: var(--muted);
  font-size: 0.88rem;
  margin-left: 0.35rem;
}

.collaborators-section p {
  margin-bottom: 0;
}

/* =========================
   Controls / Buttons
========================= */
.controls button,
button {
  font-family: 'Nunito', sans-serif;
  font-size: 0.95rem;
  background: var(--white);
  color: var(--navy);
  border: 1px solid var(--border-dark);
  border-radius: 8px;
  padding: 0.45rem 0.8rem;
  cursor: pointer;
}

.controls button:hover,
button:hover {
  border-color: var(--orange);
  color: var(--orange);
}

/* =========================
   Responsive: tablets
========================= */
@media (max-width: 900px) {
  .container {
    width: min(94%, 1000px);
  }

  .nav-container {
    width: min(94%, 1000px);
  }

  .nav-logo,
  .nav-logo-hero {
    font-size: 1.35rem;
  }

  .header-grid {
    grid-template-columns: 160px 1fr;
    gap: 1.25rem;
  }

  .profile-pic img {
    width: 150px;
  }

  .topic-layout,
  .topic-layout.reverse {
    grid-template-columns: 1fr;
  }

  .topic-layout.reverse .topic-text,
  .topic-layout.reverse .topic-figure {
    order: initial;
  }

  .research-topic {
    padding: 1.2rem;
  }

  .research-intro h1 {
    font-size: 1.75rem;
  }
}

/* =========================
   Responsive: phones
========================= */
@media (max-width: 700px) {
  .navbar {
    padding: 0.6rem 0;
  }

  .nav-container {
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
  }

  .nav-logo,
  .nav-logo-hero {
    font-size: 1.25rem;
    text-align: center;
  }

  .nav-menu {
    justify-content: center;
    width: 100%;
  }

  .nav-link {
    font-size: 0.95rem;
    padding: 7px 10px;
  }

  .header-grid {
    display: flex;
    flex-direction: column;
    text-align: center;
    gap: 1.15rem;
    padding: 0;
  }

  .profile-pic img {
    width: 140px;
  }

  .profile-info {
    width: 100%;
  }

  .profile-info h1 {
    font-size: 1.45rem;
    margin-bottom: 0.45rem;
  }

  .profile-info p {
    font-size: 0.97rem;
  }

  main {
    padding: 1.5rem 0;
  }

  main h2 {
    font-size: 1.35rem;
  }

  main p,
  main li {
    font-size: 0.95rem;
  }

  .pub-authors {
    white-space: normal;
    overflow: visible;
    text-overflow: initial;
  }

  .research-topic {
    border-radius: 12px;
    padding: 1.1rem;
  }

  .topic-figure img {
    max-width: 300px;
  }

  footer {
    padding: 0.9rem 0;
    font-size: 0.85rem;
  }
}

/* =========================
   Responsive: small phones
========================= */
@media (max-width: 480px) {
  .container,
  .nav-container {
    width: 94%;
  }

  .nav-logo,
  .nav-logo-hero {
    font-size: 1.1rem;
  }

  .nav-menu {
    gap: 0.3rem;
  }

  .nav-link {
    font-size: 0.88rem;
    padding: 6px 8px;
  }

  .profile-pic img {
    width: 120px;
  }

  .profile-info h1 {
    font-size: 1.2rem;
  }

  .profile-info p {
    font-size: 0.93rem;
  }

  main h2 {
    font-size: 1.2rem;
  }

  main p,
  main li {
    font-size: 0.92rem;
  }

  .research-intro h1 {
    font-size: 1.5rem;
  }

  .topic-figure img {
    max-width: 260px;
  }

  .topic-links h3 {
    font-size: 1rem;
  }

  .paper-note {
    display: block;
    margin-left: 0;
  }
}

/* =========================
   Publications Page
========================= */
.publications-page {
  padding-bottom: 3rem;
}

.pubs-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  align-items: flex-start;
  margin: 1rem 0 1.25rem;
  padding: 1rem 1.1rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 2px 8px rgba(11, 42, 69, 0.04);
}

.pubs-toolbar-group {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.pubs-toolbar-group-tags {
  flex: 1 1 420px;
}

.pubs-toolbar-label {
  font-family: 'Nunito', sans-serif;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.2;
}

.pubs-button-row,
.tag-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pub-sort-btn,
.tag-filter-btn {
  font-family: 'Nunito', sans-serif;
  font-size: 0.92rem;
  font-weight: 600;
  background: var(--white);
  color: var(--navy);
  border: 1px solid var(--border-dark);
  border-radius: 999px;
  padding: 0.45rem 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
}

.pub-sort-btn:hover,
.tag-filter-btn:hover {
  border-color: var(--orange);
  color: var(--orange);
}

.pub-sort-btn.is-active,
.tag-filter-btn.is-active {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--bg);
}

.pubs-status {
  margin-bottom: 0.9rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.pub-item {
  margin-bottom: 1.25rem;
}

.pub-meta-hidden {
  display: none !important;
}

.pub-hidden {
  display: none !important;
}

@media (max-width: 700px) {
  .pubs-toolbar {
    padding: 0.9rem;
    gap: 0.9rem;
  }

  .pub-sort-btn,
  .tag-filter-btn {
    font-size: 0.88rem;
    padding: 0.4rem 0.75rem;
  }
}

@media (max-width: 480px) {
  .pubs-toolbar {
    margin-top: 0.9rem;
  }

  .pubs-toolbar-label {
    font-size: 0.94rem;
  }

  .pubs-status {
    font-size: 0.9rem;
  }

  .pub-title {
    font-size: 1rem;
  }
}