/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: 'Noto Sans', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.7;
  color: #2c3e50;
  background: #fdfdfd;
}

/* ===== Layout ===== */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 32px 0;
}

section + section {
  border-top: 1px solid #e8e8e8;
}

/* ===== Hero / Header ===== */
.hero {
  text-align: center;
  padding: 60px 0 40px;
  background: linear-gradient(180deg, #f0f4f8 0%, #fdfdfd 100%);
}

.hero-title {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  margin-bottom: 24px;
}

.hero h1 {
  font-family: 'Noto Serif', Georgia, serif;
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.25;
  color: #1a1a2e;
  margin-bottom: 0;
  letter-spacing: -0.02em;
}

.hero-logo {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
}

.hero-logo img {
  height: 180px;
  width: auto;
}

.hero-logo-text {
  display: block;
  margin-top: -16px;
  font-family: 'Plus Jakarta Sans', 'Noto Sans', sans-serif;
  font-size: 1.0rem;
  font-weight: 600;
  color: #2c3e50;
}

.hero-logo:hover .hero-logo-text {
  color: #2980b9;
}

/* ===== Authors ===== */
.authors {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 20px;
  margin-bottom: 12px;
  font-size: 1.05rem;
}

.authors a {
  color: #34495e;
  text-decoration: none;
}

.authors a:hover {
  color: #2980b9;
  text-decoration: underline;
}

.author-note {
  font-size: 0.75rem;
  vertical-align: super;
  color: #7f8c8d;
}

.affiliations {
  font-size: 0.9rem;
  color: #7f8c8d;
  margin-bottom: 8px;
}

.institutions {
  font-size: 0.9rem;
  color: #7f8c8d;
  margin-bottom: 24px;
}

.institutions a {
  color: #7f8c8d;
  text-decoration: none;
}

.institutions a:hover {
  color: #2980b9;
  text-decoration: underline;
}

.institutions sup {
  font-size: 0.75rem;
  color: #7f8c8d;
  margin-bottom: 24px;
}

/* ===== Link Buttons ===== */
.link-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 20px;
}

.link-buttons a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.2s, box-shadow 0.2s;
}

.btn-hf {
  background: #ffe066;
  color: #1a1a1a;
  border: 1.5px solid #1a1a1a;
}

.btn-hf:hover {
  background: #ffd633;
  box-shadow: 0 2px 8px rgba(255, 214, 51, 0.35);
}

.btn-code {
  background: #fff;
  color: #2c3e50;
  border: 1.5px solid #2c3e50;
}

.btn-code:hover {
  background: #f0f4f8;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn-arxiv {
  background: #b31b1b;
  color: #fff;
  border: 1.5px solid #1a1a1a;
}

.btn-arxiv:hover {
  background: #8b1515;
  box-shadow: 0 2px 8px rgba(179, 27, 27, 0.25);
}

/* ===== Section Headings ===== */
h2 {
  font-family: 'Noto Serif', Georgia, serif;
  font-size: 1.7rem;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: #2c3e50;
  margin-top: 24px;
  margin-bottom: 10px;
}

/* ===== Abstract ===== */
.abstract {
  background: #f7f9fb;
  border-left: 4px solid #2c3e50;
  padding: 24px 28px;
  border-radius: 0 8px 8px 0;
  font-size: 1.02rem;
  line-height: 1.8;
}

/* ===== Figures ===== */
.figure {
  margin: 24px 0;
  text-align: center;
}

.figure img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

.figure.teaser img {
  max-width: 60%;
}

.figure-caption {
  margin-top: 10px;
  font-size: 0.88rem;
  color: #555;
  line-height: 1.6;
  text-align: left;
  padding: 0 20px;
}

.figure-caption strong {
  color: #2c3e50;
}

.figure-row {
  display: flex;
  gap: 16px;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
}

.figure-row .figure-item {
  flex: 1;
  min-width: 280px;
  max-width: 40%;
  text-align: center;
}

.figure-row .figure-item img {
  width: 100%;
  height: auto;
  border-radius: 4px;
}

.figure-row .figure-item .figure-caption {
  padding: 0 8px;
}

.figure-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.figure-stack img {
  max-width: 60%;
}

/* ===== Tables ===== */
.table-wrapper {
  overflow-x: auto;
  margin: 24px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

thead {
  background: #2c3e50;
  color: #fff;
}

th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
}

td {
  padding: 10px 16px;
  border-bottom: 1px solid #e8e8e8;
}


tbody tr:hover {
  background: #f7f9fb;
}

tbody tr.highlight {
  background: #eef5fb;
  font-weight: 500;
}

td.best {
  font-weight: 700;
  color: #1a6b3c;
}

.table-caption {
  font-size: 0.9rem;
  color: #555;
  margin-bottom: 12px;
  line-height: 1.6;
}

/* ===== Equations ===== */
.equation {
  margin: 20px 0;
  text-align: center;
  font-size: 1.05rem;
  overflow-x: auto;
}

/* ===== BibTeX ===== */
.bibtex-wrapper {
  position: relative;
}

.bibtex {
  background: #1e1e2e;
  color: #cdd6f4;
  padding: 20px 24px;
  border-radius: 8px;
  font-family: 'Fira Code', 'Consolas', monospace;
  font-size: 0.85rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: #45475a;
  color: #cdd6f4;
  border: none;
  padding: 6px 14px;
  border-radius: 4px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.2s;
}

.copy-btn:hover {
  background: #585b70;
}

/* ===== In-text Citations ===== */
a.cite {
  color: #2980b9;
  text-decoration: none;
  font-size: 0.9em;
  font-weight: 500;
  margin-left: 2px;
  white-space: nowrap;
}

a.cite:hover {
  text-decoration: underline;
}

/* ===== References ===== */
.references {
  font-size: 0.9rem;
  line-height: 1.6;
}

.reference {
  margin-bottom: 16px;
  padding-left: 32px;
  text-indent: -32px;
  scroll-margin-top: 80px;
}

.reference:last-child {
  margin-bottom: 0;
}

.ref-number {
  display: inline-block;
  min-width: 28px;
  font-weight: 600;
  color: #2980b9;
}

.ref-authors {
  font-weight: 500;
  color: #2c3e50;
}

.ref-title {
  font-style: italic;
  color: #34495e;
}

.ref-venue {
  color: #555;
}

.reference a {
  color: #2980b9;
  text-decoration: none;
  font-size: 0.85rem;
  margin-left: 6px;
}

.reference a:hover {
  text-decoration: underline;
}

/* ===== Footer ===== */
footer {
  text-align: center;
  padding: 32px 0;
  font-size: 0.85rem;
  color: #95a5a6;
  border-top: 1px solid #e8e8e8;
}

footer a {
  color: #7f8c8d;
  text-decoration: none;
}

footer a:hover {
  color: #2c3e50;
  text-decoration: underline;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero-title {
    flex-direction: column;
    gap: 16px;
  }

  .hero-logo {
    flex-direction: column;
    align-items: center;
  }

  .hero-logo img {
    height: 80px;
  }

  .hero-logo-text {
    margin-top: -8px;
    font-size: 0.85rem;
  }

  .hero h1 {
    font-size: 1.7rem;
  }

  h2 {
    font-size: 1.4rem;
  }

  .container {
    padding: 0 16px;
  }

  section {
    padding: 28px 0;
  }

  .figure.teaser img {
    max-width: 100%;
  }

  .figure-row .figure-item {
    max-width: 100%;
  }

  .figure-caption {
    max-width: 100%;
  }

  .abstract {
    padding: 18px 20px;
  }

  .bibtex {
    font-size: 0.75rem;
  }
}

/* ===== Method highlight box ===== */
.method-highlight {
  background: #f0f7ff;
  border: 1px solid #b8d4f0;
  border-radius: 8px;
  padding: 20px 24px;
  margin: 24px 0;
}

.method-highlight p {
  margin-bottom: 8px;
}

.method-highlight p:last-child {
  margin-bottom: 0;
}

/* ===== Section separator with label ===== */
.section-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 8px 0 24px;
}

.section-divider::before,
.section-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: #ddd;
}

/* ===== Paragraphs & text ===== */
p {
  margin-bottom: 16px;
}

p:last-child {
  margin-bottom: 0;
}

strong {
  font-weight: 600;
}

/* ===== MathJax tweaks ===== */
.MathJax {
  font-size: 1em !important;
}

/* ===== Placeholder notice ===== */
.placeholder {
  color: #e74c3c;
  font-style: italic;
}

/* ===== Results grid ===== */
.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 24px 0;
}

.results-grid .figure {
  margin: 0;
}

@media (max-width: 768px) {
  .results-grid {
    grid-template-columns: 1fr;
  }
}