@font-face {
  font-family: 'IranSans';
  src: url('./fonts/IRANSansWeb.woff2') format('woff2'),
       url('./fonts/IRANSansWeb.woff') format('woff');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

/* متغیرهای CSS */
:root {
  --primary-color: #5D5CDE;
  --secondary-color: #7C3AED;
  --accent-color: #06B6D4;
  --success-color: #10B981;
  --danger-color: #EF4444;
  --warning-color: #F59E0B;
  
  /* تم روشن */
  --bg-color: #FFFFFF;
  --bg-secondary: #F8FAFC;
  --bg-tertiary: #F1F5F9;
  --text-primary: #1E293B;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --border-color: #E2E8F0;
  --card-bg: #FFFFFF;
  --header-bg: rgba(255, 255, 255, 0.95);
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
}

/* تم تاریک */
[data-theme="dark"] {
  --bg-color: #0F172A;
  --bg-secondary: #1E293B;
  --bg-tertiary: #334155;
  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-muted: #64748B;
  --border-color: #334155;
  --card-bg: #1E293B;
  --header-bg: rgba(15, 23, 42, 0.95);
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
}

/* ریست و تنظیمات پایه */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'IranSans', 'Segoe UI', Tahoma, Arial, sans-serif;
  direction: rtl;
  background: linear-gradient(135deg, var(--bg-color) 0%, var(--bg-secondary) 100%);
  color: var(--text-primary);
  min-height: 100vh;
  transition: var(--transition);
  line-height: 1.6;
}

/* لودینگ */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: var(--transition);
}

.loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-content {
  text-align: center;
  color: white;
  background: var(--card-bg);
  padding: 2rem;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border-color);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

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

/* هدر */
.header {
  background: var(--header-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: var(--transition);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-left {
  display: flex;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-5px); }
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-btn {
  width: 44px;
  height: 44px;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.header-btn:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* محتوای اصلی */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* آمار کلی */
.stats-section {
  margin-bottom: 2rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.stat-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary-color)20, var(--secondary-color)20);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.stat-content h3 {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.stat-content p {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

/* تب‌ها */
.tabs-section {
  margin-bottom: 2rem;
}

.tabs {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  padding: 0.5rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.tab-btn {
  background: transparent;
  border: none;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  box-shadow: var(--shadow-md);
}

.tab-btn:not(.active):hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.tab-icon {
  font-size: 1.25rem;
}

/* محتوای تب‌ها */
.content-section {
  margin-bottom: 2rem;
}

.tab-content {
  display: none;
  animation: fadeIn 0.5s ease-in-out;
}

.tab-content.active {
  display: block;
}

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

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.section-header h2 {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--text-primary);
  position: relative;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  right: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: var(--radius-sm);
}

.update-time {
  font-size: 0.875rem;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

/* شبکه آیتم‌ها */
.items-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.loading-placeholder {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
  font-size: 1.125rem;
}

/* کارت‌های آیتم */
.gold-item,
.currency-item,
.crypto-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  padding: 1.5rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.gold-item:hover,
.currency-item:hover,
.crypto-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.gold-item::before,
.currency-item::before,
.crypto-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transform: scaleX(0);
  transition: var(--transition);
  transform-origin: right;
}

.gold-item:hover::before,
.currency-item:hover::before,
.crypto-item:hover::before {
  transform: scaleX(1);
}

.item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.item-name {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  flex: 1;
}

.item-symbol {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.item-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin: 0.5rem 0;
}

.item-price .unit {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.item-change {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
}

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

.change-positive::before {
  content: '↗';
  margin-left: 0.25rem;
}

.change-negative {
  color: var(--danger-color);
}

.change-negative::before {
  content: '↘';
  margin-left: 0.25rem;
}

.item-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border-color);
}

.market-cap {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* فوتر */
.footer {
  background: var(--card-bg);
  border-top: 1px solid var(--border-color);
  margin-top: 3rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--text-secondary);
}

.footer-content p {
  margin-bottom: 0.5rem;
}

.footer-content p:last-child {
  margin-bottom: 0;
}

/* خطای شبکه */
.error {
  text-align: center;
  color: var(--danger-color);
  font-size: 1.125rem;
  padding: 3rem;
  background: var(--card-bg);
  border: 1px solid var(--danger-color);
  border-radius: var(--radius-2xl);
  margin: 2rem 0;
}

/* ریسپانسیو */
@media (max-width: 768px) {
  .header-content {
    padding: 0.75rem 1rem;
  }
  
  h1 {
    font-size: 1.5rem;
  }
  
  .logo-icon {
    width: 40px;
    height: 40px;
    font-size: 1.25rem;
  }
  
  .main {
    padding: 1.5rem 1rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .tabs {
    grid-template-columns: 1fr;
  }
  
  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .section-header h2 {
    font-size: 1.5rem;
  }
  
  .items-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .item-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  
  .item-price {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .stat-card {
    padding: 1rem;
  }
  
  .stat-icon {
    width: 48px;
    height: 48px;
    font-size: 1.5rem;
  }
  
  .tab-btn {
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
  }
  
  .tab-icon {
    font-size: 1rem;
  }
  
  .gold-item,
  .currency-item,
  .crypto-item {
    padding: 1rem;
  }
}