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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: #1a1a2e;
  line-height: 1.7;
  background: #ffffff;
}

a {
  color: #4361ee;
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #3a0ca3;
}

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

/* ===== Layout ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.container.narrow {
  max-width: 860px;
}

.section {
  padding: 64px 0;
}

.alt-bg {
  background: #f8f9fc;
}

/* ===== Hero / Header ===== */
.hero {
  text-align: center;
  padding: 72px 24px 48px;
  background: linear-gradient(180deg, #e9efff 0%, #ffffff 100%);
}

.conference-badge {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: #4361ee;
  margin-bottom: 20px;
}

.highlight-badge {
  background: linear-gradient(135deg, #f72585, #b5179e);
  color: #fff;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-left: 6px;
}

.title {
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1.2;
  color: #1a1a2e;
  margin-bottom: 28px;
}

.authors {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: #333;
}

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

.author a:hover {
  color: #4361ee;
}

.affiliations {
  font-size: 0.92rem;
  color: #666;
  line-height: 1.8;
  margin-bottom: 4px;
}

.corresponding {
  font-size: 0.85rem;
  color: #888;
  margin-bottom: 24px;
}

/* ===== Link Buttons ===== */
.link-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  color: #fff;
  background: #1a1a2e;
  transition: background 0.2s, transform 0.15s;
}

.btn:hover {
  background: #4361ee;
  color: #fff;
  transform: translateY(-1px);
}

.btn i {
  font-size: 1rem;
}

/* ===== Section Headings ===== */
h2 {
  font-size: 1.85rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 36px;
  color: #1a1a2e;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 40px 0 20px;
  color: #333;
  text-align: center;
}

/* ===== Teaser ===== */
.teaser-image {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  margin-bottom: 24px;
  background: #f5f5f5;
}

.teaser-image img {
  width: 100%;
}

.teaser-caption {
  font-size: 0.95rem;
  color: #555;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
  line-height: 1.7;
}

.yellow-label {
  color: #e6a700;
  font-weight: 600;
}

.pink-label {
  color: #e84393;
  font-weight: 600;
}

.blue-label {
  color: #4361ee;
  font-weight: 600;
}

/* ===== Abstract ===== */
.abstract-text {
  font-size: 1.02rem;
  line-height: 1.85;
  color: #444;
  text-align: justify;
}

/* ===== Contributions ===== */
.contributions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.contribution-card {
  background: #fff;
  border: 1px solid #e8ecf1;
  border-radius: 12px;
  padding: 28px 24px;
  transition: box-shadow 0.2s, transform 0.15s;
}

.contribution-card:hover {
  box-shadow: 0 6px 24px rgba(67, 97, 238, 0.1);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: linear-gradient(135deg, #4361ee, #3a0ca3);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.contribution-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 10px;
  text-align: left;
  color: #1a1a2e;
}

.contribution-card p {
  font-size: 0.9rem;
  color: #666;
  line-height: 1.65;
}

/* ===== Method ===== */
.method-image {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  margin-bottom: 24px;
  background: #fff;
}

.method-image img {
  width: 100%;
}

.method-caption {
  font-size: 0.95rem;
  color: #555;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== Results ===== */
.result-image {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  margin-bottom: 16px;
  background: #fff;
}

.result-image img {
  width: 100%;
}

.result-caption {
  font-size: 0.92rem;
  color: #666;
  text-align: center;
  max-width: 800px;
  margin: 0 auto 24px;
  line-height: 1.65;
}

/* ===== Video ===== */
.video-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* ===== BibTeX ===== */
.bibtex-box {
  position: relative;
  background: #1a1a2e;
  border-radius: 12px;
  padding: 28px 28px 28px;
  overflow-x: auto;
}

.bibtex-box pre {
  margin: 0;
}

.bibtex-box code {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.88rem;
  color: #c9d1d9;
  line-height: 1.6;
  white-space: pre;
}

.copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(255, 255, 255, 0.1);
  color: #c9d1d9;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: background 0.2s;
  font-family: 'Inter', sans-serif;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ===== Footer ===== */
footer {
  padding: 32px 24px;
  text-align: center;
  border-top: 1px solid #e8ecf1;
  color: #999;
  font-size: 0.85rem;
}

footer a {
  color: #4361ee;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .title {
    font-size: 1.8rem;
  }

  .authors {
    font-size: 0.95rem;
  }

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

  .section {
    padding: 48px 0;
  }

  .link-buttons {
    gap: 8px;
  }

  .btn {
    padding: 8px 16px;
    font-size: 0.88rem;
  }
}

@media (max-width: 480px) {
  .title {
    font-size: 1.5rem;
  }

  .hero {
    padding: 48px 16px 32px;
  }

  h2 {
    font-size: 1.5rem;
  }
}