:root {
  --primary-dark: #1a1a1a;
  --secondary-dark: #2d2d2d;
  --tertiary-dark: #3d3d3d;
  --accent-green: #00d084;
  --accent-red: #f84960;
  --accent-blue: #3861fb;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --border-color: #404040;
  --hover-bg: #404040;
  --card-bg: #252525;
  --gradient-primary: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'SF Pro Text', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--primary-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}

.header {
  background: var(--gradient-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  margin-bottom: 24px;
}

.header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.header p {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.controls {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
}

.control-group {
  margin-bottom: 24px;
}

.control-group label {
  display: block;
  margin-bottom: 12px;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.checkbox-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.checkbox-item {
  display: flex;
  align-items: center;
  background: var(--secondary-dark);
  border: 1px solid var(--border-color);
  padding: 16px;
  border-radius: 8px;
  transition: all 0.2s ease;
  cursor: pointer;
}

.checkbox-item:hover {
  background: var(--hover-bg);
  border-color: var(--accent-blue);
}

.checkbox-item input[type="checkbox"] {
  margin-right: 12px;
  width: 18px;
  height: 18px;
  accent-color: var(--accent-green);
}

.checkbox-item label {
  margin: 0;
  cursor: pointer;
  font-weight: 500;
  color: var(--text-primary);
}

input[type="number"] {
  width: 100%;
  padding: 14px 16px;
  background: var(--secondary-dark);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 16px;
  transition: border-color 0.2s ease;
}

input[type="number"]:focus {
  outline: none;
  border-color: var(--accent-blue);
}

.analyze-btn {
  width: 100%;
  background: var(--accent-blue);
  color: white;
  border: none;
  padding: 16px 32px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 20px;
}

.analyze-btn:hover:not(:disabled) {
  background: #2850eb;
}

.analyze-btn:disabled {
  background: var(--text-muted);
  cursor: not-allowed;
}

.results {
  display: none;
}

.results.show {
  display: block;
}

.section {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  margin-bottom: 20px;
  border-radius: 12px;
  overflow: hidden;
}

.section-header {
  background: var(--secondary-dark);
  color: var(--text-primary);
  padding: 20px 24px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.section-header:hover {
  background: var(--hover-bg);
}

.section-header i {
  transition: transform 0.3s ease;
  color: var(--text-secondary);
}

.section-header.collapsed i {
  transform: rotate(180deg);
}

.section-content {
  padding: 24px;
  display: block;
}

.section-content.collapsed {
  display: none;
}

.news-item {
  border-bottom: 1px solid var(--border-color);
  padding: 20px 0;
}

.news-item:hover {
  background: rgba(255, 255, 255, 0.02);
}

.news-item:last-child {
  border-bottom: none;
}

.news-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  font-size: 1.05rem;
  line-height: 1.4;
}

.news-summary {
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.news-link {
  color: var(--accent-blue);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
}

.news-link:hover {
  text-decoration: underline;
}

.coin-grid-header {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1.2fr 1.3fr;
  gap: 16px;
  padding: 16px 20px;
  background: var(--tertiary-dark);
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.coin-item {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1.2fr 1.3fr;
  gap: 16px;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(64, 64, 64, 0.3);
  transition: background-color 0.2s ease;
}

.coin-item:hover {
  background: rgba(255, 255, 255, 0.02);
}

.coin-item:last-child {
  border-bottom: none;
}

.coin-symbol {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 1rem;
  display: flex;
  align-items: center;
}

.coin-rank {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-right: 8px;
  min-width: 24px;
}

.coin-price {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  font-family: 'SF Mono', Monaco, monospace;
}

.coin-change {
  font-size: 0.95rem;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 6px;
  text-align: center;
  font-family: 'SF Mono', Monaco, monospace;
}

.positive {
  background: rgba(0, 208, 132, 0.15);
  color: var(--accent-green);
}

.negative {
  background: rgba(248, 73, 96, 0.15);
  color: var(--accent-red);
}

.coin-volume {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-family: 'SF Mono', Monaco, monospace;
}

.analysis-content {
  background: var(--secondary-dark);
  padding: 24px;
  border-radius: 8px;
  line-height: 1.7;
  font-size: 1rem;
  color: var(--text-primary);
  white-space: pre-line;
}

.loading {
  text-align: center;
  padding: 60px 20px;
}

.loading-spinner {
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--accent-blue);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 0 auto 20px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.error {
  background: rgba(248, 73, 96, 0.1);
  border: 1px solid rgba(248, 73, 96, 0.3);
  color: var(--accent-red);
  padding: 16px;
  border-radius: 8px;
  margin: 16px 0;
}

.success {
  background: rgba(0, 208, 132, 0.1);
  border: 1px solid rgba(0, 208, 132, 0.3);
  color: var(--accent-green);
  padding: 16px;
  border-radius: 8px;
  margin: 16px 0;
}

.rss-management {
  background: var(--secondary-dark);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  margin-top: 20px;
}

.rss-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.rss-header h3 {
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 600;
}

.add-rss-btn {
  background: var(--accent-green);
  color: white;
  border: none;
  padding: 10px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background-color 0.2s ease;
}

.add-rss-btn:hover {
  background: #00b876;
}

.rss-form {
  display: none;
  background: var(--tertiary-dark);
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 20px;
}

.rss-form.show {
  display: block;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  background: var(--primary-dark);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 16px;
  transition: border-color 0.2s ease;
}

.form-group input:focus {
  outline: none;
  border-color: var(--accent-blue);
}

.form-buttons {
  display: flex;
  gap: 12px;
}

.form-buttons button {
  flex: 1;
  padding: 12px 20px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: background-color 0.2s ease;
}

.submit-btn {
  background: var(--accent-blue);
  color: white;
}

.submit-btn:hover {
  background: #2850eb;
}

.cancel-btn {
  background: var(--text-muted);
  color: white;
}

.cancel-btn:hover {
  background: #555555;
}

.rss-list {
  max-height: 300px;
  overflow-y: auto;
}

.rss-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px;
  background: var(--tertiary-dark);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 12px;
  transition: background-color 0.2s ease;
}

.rss-item:hover {
  background: var(--hover-bg);
}

.rss-info {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}

.rss-actions button {
  padding: 8px 12px;
  background: rgba(248, 73, 96, 0.15);
  color: var(--accent-red);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: background-color 0.2s ease;
}

.rss-actions button:hover {
  background: rgba(248, 73, 96, 0.25);
}

.rss-url {
  color: var(--text-muted);
  font-size: 0.85rem;
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.toc {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}

.toc-header {
  background: var(--secondary-dark);
  color: var(--text-primary);
  padding: 16px 20px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 1.1rem;
  font-weight: 600;
}

.toc-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.toc-item {
  display: flex;
  align-items: center;
  padding: 14px 16px;
  background: var(--secondary-dark);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.toc-item:hover {
  background: var(--hover-bg);
  border-color: var(--accent-blue);
}

.toc-item i {
  margin-right: 12px;
  font-size: 1.1rem;
}

.toc-news i { color: var(--accent-blue); }
.toc-coins i { color: var(--accent-green); }
.toc-analysis i { color: #ffa726; }

.news-source-section {
  margin-bottom: 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

.news-source-header {
  background: var(--secondary-dark);
  color: var(--text-primary);
  padding: 16px 20px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.news-source-header:hover {
  background: var(--hover-bg);
}

.news-source-content {
  padding: 0 20px;
  max-height: 1000px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.news-source-content.collapsed {
  max-height: 0;
  padding: 0 20px;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .container {
      padding: 12px;
  }

  .header h1 {
      font-size: 1.75rem;
  }

  .header, .controls {
      padding: 20px;
  }

  .checkbox-group {
      grid-template-columns: 1fr;
  }

  .coin-grid-header,
  .coin-item {
      grid-template-columns: 1fr;
      gap: 8px;
      text-align: left;
  }

  .coin-item {
      padding: 16px;
  }

  .coin-symbol {
      font-size: 1.1rem;
      margin-bottom: 8px;
  }

  .coin-price,
  .coin-change,
  .coin-volume {
      margin-bottom: 4px;
  }

  .coin-grid-header {
      display: none;
  }

  .rss-header {
      flex-direction: column;
      gap: 12px;
      align-items: stretch;
  }

  .add-rss-btn {
      justify-content: center;
  }

  .rss-item {
      flex-direction: column;
      gap: 12px;
      align-items: stretch;
  }

  .form-buttons {
      flex-direction: column;
  }

  .toc-list {
      grid-template-columns: 1fr;
  }

  .analysis-content {
      padding: 20px;
      font-size: 0.95rem;
  }

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

@media (max-width: 480px) {
  .container {
      padding: 8px;
  }

  .header {
      padding: 16px;
  }

  .header h1 {
      font-size: 1.5rem;
  }

  .controls {
      padding: 16px;
  }

  .section-header {
      padding: 16px;
      font-size: 1rem;
  }

  .analyze-btn {
      padding: 14px 20px;
  }
}