:root {
  --primary-color: #3858f6;
  --secondary-color: #16c784;
  --danger-color: #ea3943;
  --text-color: #222531;
  --text-secondary: #616e85;
  --background-color: #f8f9fa;
  --card-background: #ffffff;
  --border-color: #e1e5eb;

  /* Dark mode variables */
  --dark-primary-color: #4a6bff;
  --dark-secondary-color: #19e395;
  --dark-danger-color: #ff4751;
  --dark-text-color: #e4e6eb;
  --dark-text-secondary: #b0b3b8;
  --dark-background-color: #18191a;
  --dark-card-background: #242526;
  --dark-border-color: #3a3b3c;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  margin: 0;
  padding: 0;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Dark mode styles */
body.dark-mode {
  background-color: var(--dark-background-color);
  color: var(--dark-text-color);
}

/* Header styles */
.header {
  background-color: var(--card-background);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

body.dark-mode .header {
  background-color: var(--dark-card-background);
  border-bottom-color: var(--dark-border-color);
}

.crypto-ticker {
  background-color: #141b30;
  color: white;
  padding: 4px 0;
  font-size: 13px;
  transition: background-color 0.3s ease;
  overflow: hidden;
  position: relative;
}

body.dark-mode .crypto-ticker {
  background-color: #0c1223;
}

#crypto-ticker-container {
  display: flex;
  align-items: center;
  animation: tickerScroll 60s linear infinite;
  white-space: nowrap;
  will-change: transform;
  width: max-content;
}

/* Pause animation when hovered */
#crypto-ticker-container:hover {
  animation-play-state: paused;
}

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

.crypto-price {
  display: inline-flex;
  align-items: center;
  margin-right: 16px;
  color: #ffffff;
  padding: 0 4px;
}

.crypto-price .fw-bold {
  color: #ffffff;
}

.crypto-price > span {
  color: #ffffff;
}

.crypto-mini-icon {
  width: 16px;
  height: 16px;
  margin-right: 4px;
  border-radius: 50%;
}

.crypto-refresh-timer {
  color: rgba(255, 255, 255, 0.7);
  font-size: 12px;
  cursor: pointer;
}

.crypto-refresh-timer:hover {
  color: rgba(255, 255, 255, 1);
}

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

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

body.dark-mode .price-up {
  color: var(--dark-secondary-color);
}

body.dark-mode .price-down {
  color: var(--dark-danger-color);
}

.logo {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--primary-color);
}

body.dark-mode .logo {
  color: var(--dark-primary-color);
}

.nav-item {
  margin: 0 12px;
  font-weight: 500;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 4px;
  padding: 8px 16px;
  font-weight: 500;
  transition: background-color 0.3s ease;
}

body.dark-mode .btn-primary {
  background-color: var(--dark-primary-color);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 8px 16px;
  font-weight: 500;
  transition: border-color 0.3s ease, color 0.3s ease;
}

body.dark-mode .btn-outline {
  color: var(--dark-text-color);
  border-color: var(--dark-border-color);
}

/* News cards */
.news-section {
  padding: 24px 0;
}

.category-badge {
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 4px;
  margin-right: 8px;
  font-weight: 500;
  color: var(--primary-color);
  background-color: rgba(56, 88, 246, 0.1);
  transition: color 0.3s ease, background-color 0.3s ease;
}

body.dark-mode .category-badge {
  color: var(--dark-primary-color);
  background-color: rgba(74, 107, 255, 0.15);
}

.news-card {
  background-color: var(--card-background);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s, box-shadow 0.2s, background-color 0.3s ease;
  margin-bottom: 20px;
}

body.dark-mode .news-card {
  background-color: var(--dark-card-background);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

body.dark-mode .news-card:hover {
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 12px 0;
  line-height: 1.4;
}

.timestamp {
  font-size: 12px;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

body.dark-mode .timestamp {
  color: var(--dark-text-secondary);
}

.card-content {
  padding: 16px;
}

body.dark-mode .text-secondary {
  color: var(--dark-text-secondary) !important;
}

.card-actions {
  display: flex;
  align-items: center;
  margin-top: 16px;
}

.btn-share, .btn-save, .btn-like {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  margin-right: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  font-size: 14px;
  transition: color 0.3s ease;
}

body.dark-mode .btn-share, 
body.dark-mode .btn-save, 
body.dark-mode .btn-like {
  color: var(--dark-text-secondary);
}

.btn-share i, .btn-save i, .btn-like i {
  margin-right: 4px;
}

/* Sidebar */
.sidebar {
  background-color: var(--card-background);
  border-radius: 8px;
  padding: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

body.dark-mode .sidebar {
  background-color: var(--dark-card-background);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.user-section {
  text-align: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
  transition: border-color 0.3s ease;
}

body.dark-mode .user-section {
  border-color: var(--dark-border-color);
}

.user-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  margin: 0 auto 8px;
}

body.dark-mode .bg-light {
  background-color: var(--dark-card-background) !important;
}

.upgrade-pro {
  background: linear-gradient(90deg, #3858f6, #5d72f6);
  color: white;
  border-radius: 8px;
  padding: 16px;
  margin: 16px 0;
  position: relative;
}

.nav-menu {
  margin-top: 16px;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 8px 0;
  color: var(--text-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

body.dark-mode .nav-link {
  color: var(--dark-text-color);
}

.nav-link i {
  margin-right: 12px;
  color: var(--text-secondary);
  width: 20px;
  transition: color 0.3s ease;
}

body.dark-mode .nav-link i {
  color: var(--dark-text-secondary);
}

/* Filters */
.filters-section {
  margin-top: 24px;
}

.filter-title {
  font-weight: 600;
  font-size: 16px;
  margin-bottom: 12px;
  display: block;
}

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

.filter-checkbox {
  display: block;
  margin-bottom: 8px;
}

/* Market overview */
.market-overview {
  margin-top: 24px;
}

.crypto-item {
  display: flex;
  align-items: center;
  margin-bottom: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
  transition: border-color 0.3s ease;
}

body.dark-mode .crypto-item {
  border-color: var(--dark-border-color);
}

.crypto-icon {
  width: 24px;
  height: 24px;
  margin-right: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  overflow: hidden;
  background-color: rgba(255, 255, 255, 0.2);
  flex-shrink: 0;
}

.crypto-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

body.dark-mode .crypto-icon {
  background-color: rgba(255, 255, 255, 0.1);
}

.crypto-name {
  flex-grow: 1;
  font-weight: 500;
  color: var(--text-color);
  transition: color 0.3s ease;
}

body.dark-mode .crypto-name {
  color: var(--dark-text-color);
}

.crypto-price-container {
  text-align: right;
  color: var(--text-color);
  transition: color 0.3s ease;
}

body.dark-mode .crypto-price-container {
  color: var(--dark-text-color);
}

/* Fear & Greed Index */
.fear-greed-container {
  background-color: var(--card-background);
  border-radius: 8px;
  padding: 16px;
  margin-top: 24px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

body.dark-mode .fear-greed-container {
  background-color: var(--dark-card-background);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.fear-greed-score {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary-color);
  text-align: center;
  transition: color 0.3s ease;
}

body.dark-mode .fear-greed-score {
  color: var(--dark-primary-color);
}

.fear-greed-bar {
  height: 8px;
  background: linear-gradient(90deg, #ea3943, #f5ac37, #16c784);
  border-radius: 4px;
  margin: 16px 0;
}

/* Twitter feed */
.twitter-feed {
  margin-top: 24px;
}

.tweet {
  background-color: var(--card-background);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

body.dark-mode .tweet {
  background-color: var(--dark-card-background);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.tweet-header {
  display: flex;
  align-items: center;
  margin-bottom: 8px;
}

.tweet-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  margin-right: 8px;
}

.tweet-name {
  font-weight: 600;
  margin-right: 4px;
}

.tweet-handle {
  color: var(--text-secondary);
  font-size: 14px;
  transition: color 0.3s ease;
}

body.dark-mode .tweet-handle {
  color: var(--dark-text-secondary);
}

.tweet-actions {
  display: flex;
  margin-top: 12px;
}

.tweet-action {
  display: flex;
  align-items: center;
  margin-right: 16px;
  color: var(--text-secondary);
  font-size: 14px;
  transition: color 0.3s ease;
}

body.dark-mode .tweet-action {
  color: var(--dark-text-secondary);
}

.tweet-action i {
  margin-right: 4px;
}

/* Footer */
.footer {
  background-color: var(--card-background);
  padding: 40px 0;
  margin-top: 40px;
  border-top: 1px solid var(--border-color);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

body.dark-mode .footer {
  background-color: var(--dark-card-background);
  border-color: var(--dark-border-color);
}

.footer-title {
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-link {
  display: block;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-decoration: none;
  transition: color 0.3s ease;
}

body.dark-mode .footer-link {
  color: var(--dark-text-secondary);
}

.social-icons {
  display: flex;
  margin-top: 16px;
}

.social-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--background-color);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 8px;
  transition: background-color 0.3s ease;
}

body.dark-mode .social-icon {
  background-color: var(--dark-background-color);
}

/* Fix for Bootstrap components */
body.dark-mode .form-control {
  background-color: var(--dark-background-color);
  border-color: var(--dark-border-color);
  color: var(--dark-text-color);
}

body.dark-mode .btn-light {
  background-color: var(--dark-card-background);
  border-color: var(--dark-border-color);
  color: var(--dark-text-color);
}

body.dark-mode .text-primary {
  color: var(--dark-primary-color) !important;
}

body.dark-mode .border-top {
  border-color: var(--dark-border-color) !important;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    margin-bottom: 24px;
  }
}

.crypto-ticker a {
  color: #ffffff;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.crypto-ticker a:hover {
  opacity: 1;
  color: #ffffff;
}

.crypto-updating {
  display: inline-flex;
  align-items: center;
  color: rgba(255, 255, 255, 0.7);
}

.crypto-updating i {
  margin-right: 5px;
}

.ticker-wrapper {
  overflow: hidden;
  padding: 4px 0;
  position: relative;
}

.ticker-actions {
  background: linear-gradient(90deg, 
    rgba(20,27,48,0) 0%, 
    rgba(20,27,48,0.9) 30%, 
    rgba(20,27,48,1) 100%
  );
  height: 100%;
  z-index: 10;
  padding-right: 15px;
  transition: background 0.3s ease;
}

body.dark-mode .ticker-actions {
  background: linear-gradient(90deg, 
    rgba(12,18,35,0) 0%, 
    rgba(12,18,35,0.9) 30%, 
    rgba(12,18,35,1) 100%
  );
}