:root {
  --primary-color: #7c3aed;
  --primary-dark: #6d28d9;
  --secondary-color: #2563eb;
  --accent-color: #10b981;
  --text-color: #1f2937;
  --text-light: #6b7280;
  --bg-color: #ffffff;
  --bg-secondary: #f8fafc;
  --card-bg: #ffffff;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --gradient-start: #7c3aed;
  --gradient-end: #2563eb;
}

.dark-mode {
  --primary-color: #8b5cf6;
  --primary-dark: #7c3aed;
  --secondary-color: #3b82f6;
  --accent-color: #34d399;
  --text-color: #f3f4f6;
  --text-light: #9ca3af;
  --bg-color: #0f172a;
  --bg-secondary: #1e293b;
  --card-bg: #1e293b;
  --border-color: #334155;
  --gradient-start: #8b5cf6;
  --gradient-end: #3b82f6;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.5;
  color: var(--text-color);
  background-color: var(--bg-color);
  transition: background-color 0.3s, color 0.3s;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navigation */
.navbar {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: all 0.3s;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-color);
  background: var(--bg-secondary);
}

/* Auth Links */
.auth-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-left: 1rem;
  padding-left: 1rem;
  border-left: 1px solid var(--border-color);
}

.auth-link {
  padding: 0.75rem 1.5rem;
  border-radius: 0.75rem;
  transition: all 0.3s;
  font-weight: 600;
}

.auth-link.signup {
  background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
  color: white !important;
  box-shadow: 0 4px 6px -1px rgba(124, 58, 237, 0.2);
}

.auth-link.signup:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 8px -1px rgba(124, 58, 237, 0.3);
}

.theme-toggle {
  background: var(--bg-secondary);
  border: none;
  cursor: pointer;
  padding: 0.75rem;
  border-radius: 0.75rem;
  transition: all 0.3s;
}

.theme-toggle:hover {
  background: var(--border-color);
}

/* Hero Section */
.hero {
  padding: 10rem 0 6rem;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at center, rgba(255,255,255,0.1) 0%, transparent 70%);
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero p {
  font-size: 1.25rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* Market Overview */
.market-overview {
  padding: 5rem 0;
  background: var(--bg-secondary);
  position: relative;
}

.market-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2.5rem;
}

.stat-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: var(--shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.stat-card h3 {
  color: var(--text-light);
  font-size: 1rem;
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.stat-card p {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Top Coins Section */
.top-coins {
  padding: 5rem 0;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
}

.filters {
  display: flex;
  gap: 1rem;
  background: var(--bg-secondary);
  padding: 0.5rem;
  border-radius: 0.75rem;
}

.filters button {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  background: transparent;
  color: var(--text-color);
  cursor: pointer;
  transition: all 0.3s;
  font-weight: 500;
}

.filters button.active {
  background: var(--card-bg);
  color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.coin-table-container {
  overflow-x: auto;
  border-radius: 1rem;
  box-shadow: var(--shadow);
}

.coin-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
}

.coin-table th,
.coin-table td {
  padding: 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.coin-table th {
  background: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-light);
  white-space: nowrap;
}

.coin-table tr:hover {
  background: var(--bg-secondary);
}

/* Featured Coins */
.featured-coins {
  padding: 5rem 0;
  background: var(--bg-secondary);
}

.coin-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.coin-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: var(--shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}

.coin-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

/* Market Trends */
.market-trends {
  padding: 5rem 0;
}

.trend-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.trend-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: var(--shadow);
}

.trend-card h3 {
  margin-bottom: 1.5rem;
  color: var(--text-color);
  font-weight: 600;
}

.trend-card ul {
  list-style: none;
}

.trend-card li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 500;
}

.trend-card li:last-child {
  border-bottom: none;
}

/* Footer */
footer {
  background: var(--bg-secondary);
  padding: 5rem 0 2rem;
  margin-top: 5rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-section h3 {
  margin-bottom: 1.5rem;
  color: var(--text-color);
  font-weight: 600;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.75rem;
}

.footer-section a {
  color: var(--text-light);
  text-decoration: none;
  transition: color 0.3s;
  padding: 0.25rem 0;
}

.footer-section a:hover {
  color: var(--primary-color);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-light);
}

/* Auth Forms */
.auth-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
}

.auth-card {
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: 1rem;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 400px;
}

.auth-card h2 {
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: 2rem;
  text-align: center;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.input-group label {
  font-weight: 500;
  color: var(--text-color);
}

.input-group input {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  background: var(--bg-secondary);
  color: var(--text-color);
  transition: all 0.3s;
}

.input-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.form-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.5rem;
}

.remember-me,
.terms {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-light);
}

.forgot-password {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

.auth-btn {
  background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
  color: white;
  padding: 0.875rem;
  border: none;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.auth-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 6px -1px rgba(124, 58, 237, 0.2);
}

.auth-redirect {
  text-align: center;
  margin-top: 1.5rem;
  color: var(--text-light);
}

.auth-redirect a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

/* Wallet Section */
.wallet-section {
  padding: 5rem 0;
}

.wallet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.wallet-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: var(--shadow);
}

.wallet-status {
  margin-top: 1.5rem;
}

.connect-btn {
  background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
  color: white;
  padding: 0.875rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  margin-top: 1rem;
  width: 100%;
}

.connect-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 6px -1px rgba(124, 58, 237, 0.2);
}

.wallet-balance {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.balance-item h3 {
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.balance-item p {
  font-size: 1.5rem;
  font-weight: 700;
}

.send-form {
  margin-top: 2rem;
}

.send-btn {
  background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
  color: white;
  padding: 0.875rem;
  border: none;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  width: 100%;
  margin-top: 1rem;
}

.send-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .nav-links {
    display: none;
  }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--card-bg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
  }

  .auth-links {
    flex-direction: column;
    border-left: none;
    padding-left: 0;
    margin-left: 0;
    width: 100%;
    gap: 1rem;
  }

  .auth-link {
    width: 100%;
    text-align: center;
  }

  .mobile-menu {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
  }

  .mobile-menu span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--text-color);
    margin: 5px 0;
    transition: all 0.3s;
  }

  .mobile-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  .section-header {
    flex-direction: column;
    gap: 1.5rem;
  }

  .filters {
    width: 100%;
    overflow-x: auto;
    padding: 0.5rem;
  }

  .filters button {
    white-space: nowrap;
  }
}

/* Utility Classes */
.positive {
  color: var(--accent-color);
}

.negative {
  color: #ef4444;
}

/* Portfolio Page Specific Styles */
.portfolio-hero {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
}

.portfolio-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.add-asset-btn {
  background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
  color: white;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.add-asset-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 6px -1px rgba(124, 58, 237, 0.2);
}

.portfolio-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.portfolio-assets {
  background: var(--card-bg);
  border-radius: 1rem;
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 3rem;
}

.action-btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 0.5rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
  margin-right: 0.5rem;
}

.action-btn:not(.delete) {
  background: var(--bg-secondary);
  color: var(--primary-color);
}

.action-btn.delete {
  background: #fee2e2;
  color: #ef4444;
}

.chart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.chart-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: var(--shadow);
}

.chart-placeholder {
  height: 300px;
  background: var(--bg-secondary);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  margin-top: 1rem;
}

/* News Page Specific Styles */
.news-hero {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
}

.news-filters {
  background: var(--bg-secondary);
  padding: 1.5rem 0;
  margin-bottom: 3rem;
}

.filter-tabs {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.filter-tab {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.75rem;
  background: var(--card-bg);
  color: var(--text-color);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
  white-space: nowrap;
}

.filter-tab.active {
  background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
  color: white;
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.news-card {
  background: var(--card-bg);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.news-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.news-content {
  padding: 1.5rem;
}

.news-meta {
  display: flex;
  justify-content: space-between;
  color: var(--text-light);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.news-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.news-excerpt {
  color: var(--text-light);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.read-more {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.load-more {
  text-align: center;
  margin-top: 3rem;
}

.load-more-btn {
  background: var(--bg-secondary);
  color: var(--primary-color);
  padding: 0.75rem 2rem;
  border: none;
  border-radius: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.load-more-btn:hover {
  background: var(--primary-color);
  color: white;
}

.updates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .portfolio-header {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .add-asset-btn {
    width: 100%;
  }

  .filter-tabs {
    justify-content: start;
    padding-bottom: 0.5rem;
  }

  .filter-tab {
    flex: 0 0 auto;
  }

  .news-card img {
    height: 150px;
  }
}




/* Add to your existing style.css */
/* Add to your existing style.css */

:root {
  /* Light mode variables */
  --bg-primary: #ffffff;
  --bg-secondary: #f3f4f6;
  --text-primary: #111827;
  --text-light: #6b7280;
  --border-color: #e5e7eb;
  --card-bg: #ffffff;
  --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.dark-mode {
  /* Dark mode variables */
  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --text-primary: #f3f4f6;
  --text-light: #9ca3af;
  --border-color: #374151;
  --card-bg: #1f2937;
  --shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color 0.3s, color 0.3s;
}

/* Admin Dashboard Styles */
.admin-dashboard {
  padding-top: 100px;
}

.admin-header {
  margin-bottom: 2rem;
}

.admin-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.admin-header p {
  color: var(--text-light);
}

.admin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.admin-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: var(--shadow);
  transition: background-color 0.3s;
}

.admin-card h2 {
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.user-stats,
.portfolio-stats,
.system-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-item h3 {
  color: var(--text-light);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.stat-item p {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
}

.admin-table th,
.admin-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

.admin-table th {
  font-weight: 600;
  color: var(--text-light);
}

.status-badge {
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.status-badge.active {
  background: #dcfce7;
  color: #15803d;
}

.status-badge.inactive {
  background: #fee2e2;
  color: #b91c1c;
}

.admin-btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 0.5rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
  margin-right: 0.5rem;
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.admin-btn:hover {
  opacity: 0.9;
}

.admin-btn.delete {
  background: #fee2e2;
  color: #ef4444;
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.dark-mode .sun {
  display: none;
}

.light-mode .moon {
  display: none;
}

@media (max-width: 768px) {
  .admin-grid {
      grid-template-columns: 1fr;
  }

  .admin-table {
      font-size: 0.875rem;
  }

  .admin-btn {
      padding: 0.25rem 0.5rem;
      font-size: 0.875rem;
  }
}