/* CSS Reset & Variables */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --text-primary: #f0f6fc;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent-gold: #f0b429;
  --accent-green: #3fb950;
  --accent-red: #f85149;
  --accent-blue: #58a6ff;
  --border-color: #30363d;
  --card-bg: #161b22;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

/* Header */
.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-gold);
  text-decoration: none;
}

.tagline {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.back-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--accent-gold);
}

/* Posts Grid */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 24px;
  padding: 32px 0;
}

/* Post Card */
.post-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  cursor: pointer;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--accent-gold);
}

.post-card-header {
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
}

.post-date {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.post-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
}

.post-card-body {
  padding: 20px;
}

.summary-grid {
  display: grid;
  gap: 12px;
}

.summary-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border-radius: 8px;
}

.summary-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.summary-value {
  font-weight: 600;
  font-size: 0.95rem;
}

.summary-value.price {
  color: var(--accent-gold);
}

.summary-value.bullish {
  color: var(--accent-green);
}

.summary-value.bearish {
  color: var(--accent-red);
}

.summary-value.neutral {
  color: var(--accent-blue);
}

/* Post Detail */
.post-detail {
  padding: 32px 0;
}

.post-detail-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.post-detail-date {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.post-detail-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.detail-summary {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.detail-summary-item {
  display: flex;
  flex-direction: column;
  padding: 16px 24px;
  background: var(--bg-tertiary);
  border-radius: 12px;
  min-width: 150px;
}

.detail-summary-label {
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.detail-summary-value {
  font-size: 1.3rem;
  font-weight: 700;
}

/* Content Section */
.content-section {
  margin-bottom: 40px;
}

.content-section h2 {
  font-size: 1.3rem;
  color: var(--accent-gold);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accent-gold);
  display: inline-block;
}

/* Markdown Content */
.markdown-content {
  background: var(--bg-secondary);
  padding: 24px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3 {
  color: var(--text-primary);
  margin: 24px 0 12px 0;
}

.markdown-content h1:first-child,
.markdown-content h2:first-child,
.markdown-content h3:first-child {
  margin-top: 0;
}

.markdown-content p {
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.markdown-content ul,
.markdown-content ol {
  margin: 16px 0;
  padding-left: 24px;
  color: var(--text-secondary);
}

.markdown-content li {
  margin-bottom: 8px;
}

.markdown-content strong {
  color: var(--text-primary);
}

.markdown-content code {
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

.markdown-content blockquote {
  border-left: 4px solid var(--accent-gold);
  padding-left: 16px;
  margin: 16px 0;
  color: var(--text-muted);
}

/* Charts Grid */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 24px;
  margin-top: 20px;
}

.chart-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

/* Single chart per row on smaller screens */
@media (max-width: 900px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }
}

.chart-card {
  background: var(--bg-secondary);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.chart-card img {
  width: 100%;
  height: auto;
  display: block;
}

.chart-label {
  padding: 12px 16px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  background: var(--bg-tertiary);
}

/* Loading & Error States */
.loading {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-gold);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 16px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.error, .empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.error .btn {
  margin-top: 16px;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  background: var(--accent-gold);
  color: var(--bg-primary);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
  border: none;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(240, 180, 41, 0.3);
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 24px 0;
  margin-top: auto;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
  .posts-grid {
    grid-template-columns: 1fr;
  }

  .post-detail-title {
    font-size: 1.5rem;
  }

  .detail-summary {
    flex-direction: column;
  }

  .detail-summary-item {
    min-width: auto;
  }

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

  .header .container {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

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

  .logo {
    font-size: 1.4rem;
  }

  .post-card-header,
  .post-card-body {
    padding: 16px;
  }

  .markdown-content {
    padding: 16px;
  }
}