/* ====================================
   Whale Analyzer — Article Detail Styles
   Premium reading experience
   MDLDM-inspired polish pass
   ==================================== */

/* ── Reading Progress Bar ── */
.reading-progress {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover), var(--accent));
  background-size: 200% 100%;
  animation: progressShimmer 2s linear infinite;
  z-index: var(--z-sticky);
  transition: width 80ms linear;
  border-radius: 0 2px 2px 0;
}

@keyframes progressShimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Article Container ── */
.article-container {
  max-width: 780px;
  margin: 0 auto;
  padding: 32px 28px 80px;
}

/* ── Breadcrumb ── */
.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-bottom: 36px;
  font-weight: var(--fw-medium);
  letter-spacing: 0.2px;
}

.article-breadcrumb a {
  color: var(--text-tertiary);
  text-decoration: none;
  transition: all var(--transition-fast);
  padding: 2px 0;
  border-bottom: 1px solid transparent;
}

.article-breadcrumb a:hover {
  color: var(--accent-dark);
  border-bottom-color: var(--accent);
}

.article-breadcrumb .sep {
  color: var(--text-muted);
  font-size: 10px;
}

.article-breadcrumb span:last-child {
  color: var(--text-secondary);
  font-weight: var(--fw-semibold);
  max-width: 300px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Article Header ── */
.article-header {
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 2px solid var(--border-color);
}

.article-header .article-meta-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.article-header .article-category-badge {
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
}

.article-header .article-reading-time,
.article-header .article-date {
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.article-header .article-date::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-muted);
  vertical-align: middle;
  margin-right: 0;
}

.article-header h1 {
  font-size: clamp(28px, 5vw, 42px);
  font-weight: var(--fw-black);
  letter-spacing: -1.2px;
  line-height: 1.15;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.article-header .article-title-en {
  font-size: var(--fs-lg);
  color: var(--text-tertiary);
  font-weight: var(--fw-medium);
  margin-bottom: 20px;
  letter-spacing: 0.2px;
}

.article-header .article-excerpt {
  font-size: var(--fs-md);
  color: var(--text-secondary);
  line-height: 1.75;
  font-style: italic;
  padding: 16px 20px;
  border-left: 4px solid var(--accent);
  background: linear-gradient(90deg, var(--accent-dim) 0%, transparent 100%);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-header .article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.article-header .article-tag {
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  background: var(--bg-tertiary);
  color: var(--text-tertiary);
  border: 1.5px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.3px;
}

.article-header .article-tag:hover {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--border-bold);
  transform: translateY(-1px);
  box-shadow: 2px 2px 0 var(--border-bold);
}

/* ── Article Body ── */
.article-body {
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--text-primary);
  letter-spacing: 0.01em;
}

.article-body h2 {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: var(--fw-extrabold);
  margin: 56px 0 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-color);
  position: relative;
  letter-spacing: -0.5px;
  line-height: 1.25;
}

/* Accent underline on h2 — like MDLDM section highlight */
.article-body h2::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.article-body h3 {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  margin: 40px 0 14px;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.article-body p {
  margin-bottom: 22px;
  color: var(--text-primary);
}

.article-body ul,
.article-body ol {
  padding-left: 24px;
  margin-bottom: 22px;
}

.article-body ul {
  list-style-type: disc;
}

.article-body ol {
  list-style-type: decimal;
}

.article-insight ul {
  list-style-type: '→  ';
}

.article-body li {
  margin-bottom: 10px;
  line-height: 1.75;
  position: relative;
}

.article-body strong {
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  background: linear-gradient(transparent 60%, var(--accent-dim) 60%);
  padding: 0 2px;
}

.article-body em {
  font-style: italic;
  color: var(--text-secondary);
}

/* ── Quote Card — Premium ── */
.article-quote {
  background: var(--bg-card);
  border: var(--border-width-bold) solid var(--border-bold);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  margin: 36px 0;
  position: relative;
  box-shadow: var(--shadow-card-sm);
  transition: all var(--transition-base);
}

.article-quote:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.article-quote::before {
  content: '\201C';
  position: absolute;
  top: -12px;
  left: 20px;
  font-size: 72px;
  color: var(--accent);
  opacity: 0.35;
  font-family: Georgia, 'Times New Roman', serif;
  line-height: 1;
  pointer-events: none;
}

/* Yellow accent stripe on left */
.article-quote::after {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 5px;
  background: var(--accent);
  border-radius: 0 3px 3px 0;
}

.article-quote .quote-text {
  font-size: 17px;
  font-style: italic;
  line-height: 1.75;
  color: var(--text-primary);
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
  font-weight: var(--fw-medium);
}

.article-quote .quote-author {
  font-size: var(--fs-sm);
  color: var(--accent-dark);
  font-weight: var(--fw-bold);
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-quote .quote-author::before {
  content: '——';
  letter-spacing: -2px;
  color: var(--text-muted);
}

/* ── Insight Card — Premium ── */
.article-insight {
  background: linear-gradient(135deg, rgba(255, 244, 178, 0.15) 0%, rgba(255, 214, 0, 0.08) 100%);
  border: 2px solid rgba(255, 214, 0, 0.25);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 36px 0;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.article-insight:hover {
  border-color: rgba(255, 214, 0, 0.4);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255, 214, 0, 0.08);
}

/* Subtle left accent bar */
.article-insight::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--accent), var(--accent-dark));
  border-radius: 0 2px 2px 0;
}

/* Decorative glow circle top-right */
.article-insight::after {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, var(--accent-dim) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.5;
}

.article-insight .insight-title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  color: var(--accent-dark);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.3px;
  position: relative;
  z-index: 1;
}

.article-insight ul {
  padding-left: 22px;
  margin: 0;
  position: relative;
  z-index: 1;
}

.article-insight li {
  font-size: var(--fs-base);
  color: var(--text-secondary);
  margin-bottom: 8px;
  line-height: 1.75;
  padding-left: 4px;
}

.article-insight li::marker {
  color: var(--accent-dark);
}

/* ── KPI Data Cards — Premium ── */
.article-kpis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 36px 0;
}

.article-kpi {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.article-kpi::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 50%, var(--accent-dim) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.article-kpi:hover {
  border-color: var(--border-bold);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-sm);
}

.article-kpi:hover::before {
  opacity: 1;
}

.article-kpi .kpi-value {
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: var(--fw-extrabold);
  color: var(--accent-dark);
  position: relative;
  z-index: 1;
  letter-spacing: -0.5px;
}

.article-kpi .kpi-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-top: 6px;
  font-weight: var(--fw-semibold);
  position: relative;
  z-index: 1;
}

/* ── Comparison Table — Premium ── */
.article-table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 32px 0;
  border: var(--border-width-bold) solid var(--border-bold);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card-sm);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
  min-width: 480px;
}

.article-table th {
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 14px 18px;
  text-align: left;
  font-weight: var(--fw-bold);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  border-bottom: none;
  white-space: nowrap;
}

.article-table th:first-child {
  border-radius: 0;
}

.article-table th:last-child {
  border-radius: 0;
}

.article-table td {
  padding: 13px 18px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  line-height: 1.6;
}

.article-table tr:last-child td {
  border-bottom: none;
}

.article-table tbody tr {
  transition: background var(--transition-fast);
}

.article-table tbody tr:nth-child(even) {
  background: var(--bg-section-alt);
}

.article-table tbody tr:hover {
  background: var(--accent-dim);
}

/* ── Article Image ── */
.article-image {
  margin: 36px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: var(--border-width-bold) solid var(--border-bold);
  box-shadow: var(--shadow-card-sm);
  transition: all var(--transition-base);
}

.article-image:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.article-image img {
  width: 100%;
  height: auto;
  display: block;
}

.article-image .image-caption {
  padding: 12px 18px;
  font-size: var(--fs-xs);
  color: var(--text-muted);
  background: var(--bg-tertiary);
  text-align: center;
  font-style: italic;
  letter-spacing: 0.2px;
}

/* ── Divider — Premium ── */
.article-divider {
  border: none;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
  margin: 48px 0;
  position: relative;
}

.article-divider::after {
  content: '◆';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--bg-primary);
  padding: 0 12px;
  color: var(--accent);
  font-size: 10px;
}

/* ── Related Articles ── */
.article-related {
  margin-top: 64px;
  padding-top: 40px;
  border-top: var(--border-width-bold) solid var(--border-bold);
}

.article-related h2 {
  font-size: var(--fs-xl);
  font-weight: var(--fw-extrabold);
  margin-bottom: 24px;
  border-bottom: none;
  letter-spacing: -0.5px;
}

.article-related h2::after {
  display: none;
}

.article-related .related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

/* ── Back Button — Premium ── */
.article-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border: var(--border-width-bold) solid var(--border-bold);
  border-radius: var(--radius-pill);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: var(--fw-bold);
  font-size: var(--fs-sm);
  text-decoration: none;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-btn);
  cursor: pointer;
  margin-top: 48px;
  letter-spacing: 0.3px;
}

.article-back-btn:hover {
  background: var(--accent);
  color: var(--accent-text);
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-btn-hover);
}

.article-back-btn:active {
  transform: translate(0, 0);
  box-shadow: 1px 1px 0 var(--border-bold);
}

/* ── Article Footer / Source Note ── */
.article-source-note {
  margin-top: 40px;
  padding: 16px 20px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.6;
  border: 1px solid var(--border-color);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .article-container {
    padding: 24px 20px 60px;
  }

  .article-table-wrap {
    margin-left: -12px;
    margin-right: -12px;
    border-radius: var(--radius-sm);
  }

  .article-kpis {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .article-kpi .kpi-value {
    font-size: var(--fs-xl);
  }

  .article-related .related-grid {
    grid-template-columns: 1fr;
  }

  .article-quote {
    padding: 22px 24px;
    margin: 28px 0;
  }

  .article-insight {
    padding: 20px 22px;
    margin: 28px 0;
  }

  .article-body h2 {
    margin-top: 40px;
  }
}

@media (max-width: 639px) {
  .article-container {
    padding: 16px 16px 60px;
  }

  .article-header {
    margin-bottom: 36px;
    padding-bottom: 24px;
  }

  .article-header h1 {
    font-size: 26px;
    letter-spacing: -0.8px;
  }

  .article-header .article-excerpt {
    font-size: var(--fs-sm);
    padding: 12px 16px;
  }

  .article-kpis {
    grid-template-columns: 1fr;
  }

  .article-related .related-grid {
    grid-template-columns: 1fr;
  }

  .article-quote {
    padding: 20px;
  }

  .article-quote .quote-text {
    font-size: 15px;
  }

  .article-insight {
    padding: 16px 18px;
  }

  .article-breadcrumb span:last-child {
    max-width: 200px;
  }
}