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

body {
  font-family: 'Noto Sans', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.7;
  color: #333;
  background: #fff;
}

a {
  color: #2563eb;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Hero Section ===== */
.hero {
  text-align: center;
  padding: 72px 24px 48px;
  background: linear-gradient(180deg, #f8fafc 0%, #fff 100%);
}

.hero .title {
  font-size: 2.8rem;
  font-weight: 800;
  color: #111;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.hero .subtitle {
  font-size: 1.25rem;
  font-weight: 400;
  color: #555;
  margin-bottom: 12px;
}

.hero .venue {
  display: inline-block;
  font-size: 1rem;
  font-weight: 600;
  color: #2563eb;
  background: #eff6ff;
  padding: 4px 16px;
  border-radius: 20px;
  margin-bottom: 28px;
}

/* Authors */
.authors {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.author {
  margin: 0 8px;
  white-space: nowrap;
}

.author a {
  color: #333;
  font-weight: 500;
}

.author a:hover {
  color: #2563eb;
}

.affiliations {
  font-size: 0.95rem;
  color: #666;
  margin-bottom: 6px;
}

.author-note {
  font-size: 0.85rem;
  color: #888;
  margin-bottom: 28px;
}

/* Buttons */
.buttons {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  color: #fff;
  background: #1e293b;
  transition: background 0.2s, transform 0.1s;
}

.btn:hover {
  background: #334155;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn i {
  font-size: 1.1rem;
}

/* ===== Sections ===== */
.section {
  padding: 56px 24px;
}

.alt-bg {
  background: #f8fafc;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: #111;
  margin-bottom: 24px;
  text-align: center;
}

.subsection-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: #333;
  margin: 32px 0 16px;
  text-align: center;
}

/* Abstract */
.abstract {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1rem;
  color: #444;
  text-align: justify;
}

.abstract p {
  margin-bottom: 16px;
}

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

/* Teaser & Method */
.teaser, .method {
  text-align: center;
}

.teaser img, .method img {
  max-width: 100%;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.caption {
  font-size: 0.9rem;
  color: #666;
  margin-top: 16px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* Placeholder Figure */
.placeholder-figure {
  background: #f1f5f9;
  border: 2px dashed #cbd5e1;
  border-radius: 12px;
  padding: 80px 40px;
  color: #94a3b8;
  font-size: 1rem;
  text-align: center;
}

.placeholder-figure.small {
  padding: 60px 24px;
}

/* Results Grid */
.results-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 800px;
  margin: 0 auto;
}

/* Table */
.table-wrapper {
  overflow-x: auto;
  margin: 24px auto;
  max-width: 700px;
}

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

th, td {
  padding: 12px 16px;
  text-align: center;
  border-bottom: 1px solid #e2e8f0;
}

th {
  background: #f1f5f9;
  font-weight: 600;
  color: #333;
}

.highlight-row {
  background: #eff6ff;
}

/* Video */
.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  max-width: 720px;
  margin: 0 auto;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* BibTeX */
.bibtex-wrapper {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
  background: #1e293b;
  border-radius: 10px;
  padding: 24px;
  overflow-x: auto;
}

.bibtex-wrapper pre {
  margin: 0;
}

.bibtex-wrapper code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.85rem;
  color: #e2e8f0;
  line-height: 1.6;
  white-space: pre;
}

.copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: #334155;
  color: #e2e8f0;
  border: none;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: background 0.2s;
}

.copy-btn:hover {
  background: #475569;
}

/* Footer */
footer {
  text-align: center;
  padding: 32px 24px;
  color: #999;
  font-size: 0.85rem;
  border-top: 1px solid #eee;
}

footer a {
  color: #888;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero .title {
    font-size: 2rem;
  }

  .hero .subtitle {
    font-size: 1.05rem;
  }

  .authors {
    font-size: 1rem;
  }

  .author {
    display: block;
    margin: 4px 0;
  }

  .results-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 40px 16px;
  }
}