/* ===== FONTS ===== */
@font-face {
  font-family: 'Lato';
  font-style: normal;
  font-weight: 300;
  src: url(https://fonts.gstatic.com/s/lato/v24/S6u9w4BMUTPHh7USSwiPGQ3q5d0.woff2) format('woff2');
}
@font-face {
  font-family: 'Lato';
  font-style: normal;
  font-weight: 400;
  src: url(https://fonts.gstatic.com/s/lato/v24/S6uyw4BMUTPHjx4wXiWtFCc.woff2) format('woff2');
}
@font-face {
  font-family: 'Lato';
  font-style: normal;
  font-weight: 700;
  src: url(https://fonts.gstatic.com/s/lato/v24/S6u9w4BMUTPHh6UVSwiPGQ3q5d0.woff2) format('woff2');
}
@font-face {
  font-family: 'Lato';
  font-style: normal;
  font-weight: 900;
  src: url(https://fonts.gstatic.com/s/lato/v24/S6u9w4BMUTPHh50XSwiPGQ3q5d0.woff2) format('woff2');
}

/* ===== RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: 'Lato', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: #2c3e50;
  background: #fff;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

a {
  color: #1772d0;
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: #f09228;
}

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

/* ===== LAYOUT ===== */
.page-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  margin-bottom: 48px;
}

/* ===== HERO ===== */
.hero {
  text-align: center;
  padding: 56px 0 40px;
  border-bottom: 1px solid #eee;
  margin-bottom: 48px;
}

.hero-title {
  font-size: 32px;
  font-weight: 900;
  line-height: 1.25;
  color: #1a1a2e;
  margin: 0 0 20px;
  letter-spacing: -0.5px;
}

.hero-authors {
  font-size: 17px;
  color: #555;
  margin-bottom: 14px;
}

.hero-authors a {
  color: #1772d0;
  font-weight: 700;
}

.hero-authors .author-self {
  color: #1a1a2e;
  font-weight: 700;
}

.hero-affiliation {
  font-size: 14px;
  color: #888;
  margin-bottom: 20px;
}

.hero-venue {
  display: inline-block;
  background: #fef3e2;
  color: #b45309;
  font-size: 14px;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 20px;
  margin-bottom: 24px;
  letter-spacing: 0.3px;
}

/* ===== ACTION BUTTONS ===== */
.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 700;
  border-radius: 8px;
  border: 2px solid #d0dbe8;
  color: #1772d0;
  background: #fff;
  transition: all 0.2s ease;
  cursor: pointer;
  text-decoration: none;
}

.action-btn:hover {
  background: #1772d0;
  color: #fff;
  border-color: #1772d0;
  text-decoration: none;
}

.action-btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ===== TEASER ===== */
.teaser {
  text-align: center;
  margin-bottom: 48px;
}

.teaser-img {
  width: 100%;
  border-radius: 10px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.teaser-caption {
  font-size: 13px;
  color: #888;
  margin-top: 12px;
  font-style: italic;
}

/* ===== SECTION HEADINGS ===== */
.section-title {
  font-size: 24px;
  font-weight: 900;
  color: #1a1a2e;
  margin: 0 0 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid #fef3e2;
  letter-spacing: -0.3px;
}

/* ===== ABSTRACT ===== */
.abstract-text {
  font-size: 15px;
  line-height: 1.75;
  color: #444;
  text-align: justify;
}

/* ===== KEY CONTRIBUTIONS ===== */
.contributions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 8px;
}

.contribution-card {
  background: #f8f9fb;
  border: 1px solid #e8ecf1;
  border-radius: 10px;
  padding: 20px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.contribution-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

.contribution-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: #b45309;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 10px;
}

.contribution-title {
  font-size: 14px;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 6px;
}

.contribution-desc {
  font-size: 13px;
  color: #666;
  line-height: 1.55;
  margin: 0;
}

/* ===== METHOD ===== */
.method-img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid #eee;
}

.method-caption {
  font-size: 13px;
  color: #888;
  margin-top: 12px;
  text-align: center;
  font-style: italic;
}

/* ===== HIGHLIGHT STAT ===== */
.highlight-bar {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  margin: 32px 0;
  padding: 24px;
  background: linear-gradient(135deg, #fef3e2 0%, #f0f6ff 100%);
  border-radius: 12px;
}

.highlight-stat {
  text-align: center;
}

.highlight-value {
  font-size: 32px;
  font-weight: 900;
  color: #b45309;
  line-height: 1.1;
}

.highlight-label {
  font-size: 12px;
  font-weight: 700;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 4px;
}

/* ===== RESULTS TABLE ===== */
.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin-top: 12px;
}

.results-table thead th {
  background: #f8f9fb;
  font-weight: 700;
  color: #1a1a2e;
  padding: 10px 14px;
  text-align: center;
  border-bottom: 2px solid #e8ecf1;
  font-size: 13px;
}

.results-table thead th:first-child {
  text-align: left;
}

.results-table tbody td {
  padding: 8px 14px;
  text-align: center;
  border-bottom: 1px solid #eee;
  color: #444;
}

.results-table tbody td:first-child {
  text-align: left;
  font-weight: 700;
  color: #333;
}

.results-table tbody tr:last-child {
  background: #fffbf0;
  font-weight: 700;
}

.results-table tbody tr:last-child td {
  color: #b45309;
  border-bottom: 2px solid #f0d9a8;
}

.results-table tbody tr:hover {
  background: #fafbfc;
}

.results-table tbody tr:last-child:hover {
  background: #fff7e6;
}

.table-note {
  font-size: 13px;
  color: #888;
  margin-top: 12px;
  text-align: center;
  font-style: italic;
}

/* ===== CITATION ===== */
.citation-block {
  position: relative;
  background: #1a1a2e;
  border-radius: 10px;
  padding: 24px;
  overflow: hidden;
}

.citation-block pre {
  margin: 0;
  padding: 0;
  overflow-x: auto;
}

.citation-block code {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 13px;
  line-height: 1.6;
  color: #c9d1d9;
  white-space: pre;
}

.copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  color: #c9d1d9;
  font-size: 12px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.copy-btn.copied {
  background: #2ea043;
  border-color: #2ea043;
  color: #fff;
}

/* ===== ACKNOWLEDGEMENT ===== */
.ack-text {
  font-size: 14px;
  color: #888;
  line-height: 1.6;
}

/* ===== FOOTER ===== */
.page-footer {
  text-align: center;
  padding: 32px 0 48px;
  border-top: 1px solid #eee;
  margin-top: 48px;
}

.page-footer p {
  font-size: 13px;
  color: #aaa;
  margin: 0;
}

.page-footer a {
  color: #aaa;
}

.page-footer a:hover {
  color: #1772d0;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero {
    padding: 36px 0 28px;
  }

  .hero-title {
    font-size: 24px;
  }

  .hero-authors {
    font-size: 15px;
  }

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

  .highlight-bar {
    gap: 20px;
    padding: 20px;
  }

  .highlight-value {
    font-size: 26px;
  }

  .section-title {
    font-size: 20px;
  }

  .results-table {
    font-size: 13px;
  }

  .results-table thead th,
  .results-table tbody td {
    padding: 6px 8px;
  }
}

@media (max-width: 480px) {
  .page-container {
    padding: 0 16px;
  }

  .hero-title {
    font-size: 20px;
  }

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

  .action-btn {
    width: 100%;
    justify-content: center;
  }

  .results-table {
    font-size: 12px;
  }
}