:root {
  /* Color Palette */
  --primary-bg: #0a0a0a;
  --secondary-bg: #1a1a1a;
  --card-bg: #2a2a2a;
  --hover-bg: #3a3a3a;
  --primary-text: #e0e0e0;
  --secondary-text: #b0b0b0;
  --accent-color: rgb(243, 57, 119);
  --success-color: #4caf50;
  --warning-color: #ff9800;
  --error-color: #f44336;
  --border-color: #404040;

  /* Layout Variables */
  --header-height: 120px;
  --container-padding: 20px;
  --border-radius: 12px;
  --transition-speed: 0.3s;

  /* Typography */
  --font-primary: 'Vazirmatn', 'Vazir', 'Tahoma', sans-serif;
  --font-display: 'Orbitron', 'Courier New', monospace;
  --font-mono: 'Sahel FD', 'Courier New', monospace;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  direction: rtl;
  overflow-x: hidden;
}

body {
  font-family: var(--font-primary);
  background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
  color: var(--primary-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Ensure no element causes horizontal overflow */
*, *::before, *::after {
  box-sizing: border-box;
}

/* Additional overflow protection */
.container, .toc-container, .charts-container, .footer-content {
  max-width: 100%;
  overflow: hidden;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--secondary-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-color);
}

/* Header Section */
.header {
  background: linear-gradient(135deg, var(--card-bg) 0%, var(--secondary-bg) 100%);
  border-bottom: 2px solid var(--border-color);
  padding: var(--container-padding);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="rgba(243,57,119,0.1)"/></svg>');
  background-size: 50px 50px;
  animation: float 20s infinite linear;
  pointer-events: none;
}

@keyframes float {
  0% { transform: translateX(-50px); }
  100% { transform: translateX(50px); }
}

.header-content {
  position: relative;
  z-index: 1;
}

.main-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 4rem);
  background: linear-gradient(45deg, var(--accent-color), #ffa726);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
  text-shadow: 0 0 20px rgba(243, 57, 119, 0.3);
}

.subtitle {
  font-size: 1.2rem;
  color: var(--secondary-text);
  margin-bottom: 20px;
}

.header-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 15px;
  padding: 5px 0;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 20px;
  backdrop-filter: blur(5px);
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 2px 8px;
  transition: all var(--transition-speed);
}

.stat-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
}

.stat-number {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-color);
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.65rem;
  color: var(--secondary-text);
}


/* Section Titles */
.section-title {
  font-family: 'Vazirmatn', var(--font-primary);
  font-size: 1.8rem;
  color: var(--accent-color);
  margin-bottom: 15px;
  text-align: center;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-color), transparent);
}

/* Table of Contents */
.toc-section {
  padding: var(--container-padding);
  background: var(--primary-bg);
}

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

.toc-grid {
  display: table;
  width: 100%;
  margin-top: 20px;
  border-collapse: collapse;
}

.toc-row {
  display: table-row;
}

.toc-cell {
  display: table-cell;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.toc-cell:first-child {
  text-align: right;
  width: 60%;
}

.toc-cell:last-child {
  text-align: left;
  width: 40%;
  font-family: 'Vazirmatn', 'Tahoma', sans-serif;
}

.toc-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 15px;
  transition: all var(--transition-speed);
  position: relative;
  overflow: hidden;
}

.toc-item::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent-color), transparent);
  transition: width var(--transition-speed);
}

.toc-item:hover::before {
  width: 100%;
}

.toc-item:hover {
  transform: translateX(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  border-color: var(--accent-color);
}

.toc-link {
  color: var(--primary-text);
  text-decoration: none;
  display: block;
  position: relative;
  z-index: 1;
}

.toc-name {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 3px;
}

.toc-link:hover .toc-name {
  color: var(--accent-color);
}

/* Price styling in table of contents */
.price-container {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
}

.toc-price {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-text);
  font-family: 'Vazirmatn', 'Tahoma', sans-serif;
}

.price-change {
  font-size: 0.7rem;
  font-weight: 500;
  padding: 1px 4px;
  border-radius: 3px;
  font-family: 'Vazirmatn', 'Tahoma', sans-serif;
}

.price-change.price-up {
  color: var(--error-color);
}

.price-change.price-down {
  color: var(--success-color);
}

.price-change.price-neutral {
  color: var(--secondary-text);
}

/* Charts Section */
.charts-section {
  padding: var(--container-padding);
  background: var(--primary-bg);
  min-height: 60vh;
}

.charts-container {
  max-width: 1400px;
  margin: 0 auto;
}

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

.chart-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 20px;
  transition: all var(--transition-speed);
  position: relative;
  overflow: hidden;
}

.chart-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-color);
}

.chart-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  border-color: var(--accent-color);
}

.chart-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent-color);
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-color);
  text-align: center;
}

.chart-title a:hover {
  color: var(--primary-text);
  text-decoration: underline;
}

.chart-container {
  height: 300px;
  width: 100%;
}

/* Footer */
.footer {
  background: var(--card-bg);
  padding: 30px var(--container-padding);
  border-top: 2px solid var(--border-color);
  margin-top: 40px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-content p {
  margin: 10px 0;
  color: var(--secondary-text);
}

.footer-content a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color var(--transition-speed);
}

.footer-content a:hover {
  color: var(--primary-text);
  text-decoration: underline;
}

/* Scroll to Top Button */
.scroll-to-top {
  position: fixed;
  bottom: 30px;
  left: 30px;
  background: var(--accent-color);
  color: white;
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-speed);
  z-index: 1000;
  box-shadow: 0 5px 15px rgba(243, 57, 119, 0.4);
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(243, 57, 119, 0.6);
}

/* Loading and Error States */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  backdrop-filter: blur(5px);
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--border-color);
  border-top: 4px solid var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 20px;
}

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

.error-message {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--card-bg);
  padding: 30px;
  border-radius: var(--border-radius);
  border: 2px solid var(--error-color);
  text-align: center;
  z-index: 10000;
  max-width: 400px;
  width: 90%;
}

.retry-btn {
  background: var(--accent-color);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  cursor: pointer;
  margin-top: 15px;
  transition: background var(--transition-speed);
}

.retry-btn:hover {
  background: #e55a2b;
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-stats {
    gap: 20px;
    margin-top: 10px;
  }

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

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

@media (max-width: 480px) {
  :root {
    --container-padding: 15px;
  }

  .main-title {
    font-size: 2rem;
  }

  .control-btn {
    padding: 8px 15px;
    font-size: 0.8rem;
  }
}

/* Animation Classes */
.fade-in {
  animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.slide-in-rtl {
  animation: slideInRTL 0.5s ease-out;
}

@keyframes slideInRTL {
  from { opacity: 0; transform: translateX(50px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Focus styles for accessibility */
.toc-link:focus,
.scroll-to-top:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .scroll-to-top,
  .footer {
    display: none;
  }

  .chart-card {
    break-inside: avoid;
  }
}