:root {
  --bg-primary: #0a0e27;
  --bg-secondary: #151932;
  --bg-card: #1a1f3a;
  --text-primary: #e4e9f7;
  --text-secondary: #a0aec0;
  --accent: #667eea;
  --accent-hover: #7c3aed;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  min-height: 100vh;
}

.landing-page {
  background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%);
}

.navbar {
  background-color: var(--bg-secondary);
  padding: 1rem 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.navbar-brand {
  font-weight: bold;
  font-size: 1.5rem;
}

.logo-placeholder {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  padding: 0.5rem 1.5rem;
  border-radius: 8px;
  font-weight: bold;
  letter-spacing: 2px;
  font-size: 1.2rem;
}

.logo-placeholder-large {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  padding: 2rem 4rem;
  border-radius: 16px;
  font-weight: bold;
  letter-spacing: 3px;
  font-size: 2rem;
  display: inline-block;
}

.logo-placeholder-small {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  padding: 0.3rem 1rem;
  border-radius: 6px;
  font-weight: bold;
  letter-spacing: 1px;
  font-size: 1rem;
}

.hero-section {
  padding: 6rem 0;
  text-align: center;
}

.hero-section h1 {
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.hero-section .lead {
  color: var(--text-secondary);
  font-size: 1.3rem;
}

.server-address h3 {
  color: var(--accent);
  margin-bottom: 1rem;
}

.address-box {
  background-color: var(--bg-card);
  padding: 1rem 2rem;
  border-radius: 10px;
  font-size: 1.5rem;
  font-weight: bold;
  display: inline-block;
  border: 2px solid var(--accent);
}

.stats-section {
  background-color: var(--bg-secondary);
}

.stat-card {
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
  padding: 2rem;
  border-radius: 12px;
  text-align: center;
  border: 1px solid rgba(102, 126, 234, 0.2);
}

.stat-card h2 {
  color: var(--accent);
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.stat-card p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.description-section {
  background-color: var(--bg-primary);
}

.description-section h2 {
  color: var(--accent);
}

.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid rgba(102, 126, 234, 0.2);
  margin-top: 3rem;
}

.footer p {
  margin: 0.3rem 0;
  color: var(--text-secondary);
}

.auth-page {
  background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%);
}

.auth-card {
  background-color: var(--bg-card);
  padding: 3rem;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(102, 126, 234, 0.2);
}

.auth-card h2 {
  color: var(--text-primary);
}

.auth-card a {
  color: var(--accent);
  text-decoration: none;
}

.auth-card a:hover {
  color: var(--accent-hover);
}

.form-label {
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.form-control {
  background-color: var(--bg-secondary);
  border: 1px solid rgba(102, 126, 234, 0.3);
  color: var(--text-primary);
  padding: 0.75rem;
}

.form-control:focus {
  background-color: var(--bg-secondary);
  border-color: var(--accent);
  color: var(--text-primary);
  box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.form-select {
  background-color: var(--bg-secondary);
  border: 1px solid rgba(102, 126, 234, 0.3);
  color: var(--text-primary);
}

.form-select:focus {
  background-color: var(--bg-secondary);
  border-color: var(--accent);
  color: var(--text-primary);
  box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  border: none;
  padding: 0.75rem 2rem;
  font-weight: 600;
  transition: transform 0.2s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-outline-primary {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-outline-primary:hover {
  background-color: var(--accent);
  border-color: var(--accent);
}

.btn-outline-light:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.dashboard-page .navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
}

.sidebar {
  background-color: var(--bg-secondary);
  min-height: calc(100vh - 56px);
  border-right: 1px solid rgba(102, 126, 234, 0.2);
  position: fixed;
  top: 56px;
  left: 0;
  z-index: 1000;
  transition: transform 0.3s ease-in-out;
  width: 250px;
  overflow-y: auto;
}

.sidebar.collapsed {
  transform: translateX(-100%);
}

.sidebar .nav-link {
  color: var(--text-secondary);
  padding: 0.75rem 1.5rem;
  border-left: 3px solid transparent;
  transition: all 0.3s;
}

.sidebar .nav-link:hover {
  color: var(--text-primary);
  background-color: rgba(102, 126, 234, 0.1);
}

.sidebar .nav-link.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background-color: rgba(102, 126, 234, 0.1);
}

#sidebarToggle {
  border: none;
  background: transparent;
  color: white;
  font-size: 1.5rem;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
}

#sidebarToggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

main {
  transition: margin-left 0.3s ease-in-out;
}

main.sidebar-open {
  margin-left: 250px;
}

main {
  padding-top: 1rem;
}

.dashboard-card {
  background-color: var(--bg-card);
  padding: 2rem;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(102, 126, 234, 0.2);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.dashboard-card h5 {
  color: var(--accent);
  margin-bottom: 1rem;
  font-weight: 600;
}

.dashboard-card h2 {
  color: var(--text-primary);
  font-size: 2.5rem;
  font-weight: bold;
}

.product-card {
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid rgba(102, 126, 234, 0.2);
  transition: transform 0.3s, box-shadow 0.3s;
  height: 100%;
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.product-card h5 {
  color: var(--text-primary);
  font-weight: 600;
}

.product-card .price {
  color: var(--accent);
  font-size: 1.5rem;
  font-weight: bold;
  margin: 1rem 0;
}

.product-card .description {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.table-dark {
  background-color: var(--bg-card);
  color: var(--text-primary);
}

.table-dark thead th {
  background-color: var(--bg-secondary);
  border-color: rgba(102, 126, 234, 0.2);
  color: var(--accent);
}

.table-dark tbody td {
  border-color: rgba(102, 126, 234, 0.1);
}

.table-hover tbody tr:hover {
  background-color: rgba(102, 126, 234, 0.1);
  cursor: pointer;
}

.badge {
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.badge.bg-warning {
  background-color: var(--warning) !important;
  color: var(--bg-primary);
}

.badge.bg-success {
  background-color: var(--success) !important;
}

.badge.bg-danger {
  background-color: var(--danger) !important;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
}

.summary-row.fw-bold {
  color: var(--text-primary);
  font-size: 1.2rem;
  margin-top: 0.5rem;
}

.payment-instructions {
  background-color: var(--bg-secondary);
  padding: 1.5rem;
  border-radius: 8px;
  border-left: 4px solid var(--accent);
}

.qr-code-container {
  text-align: center;
  padding: 2rem;
  background-color: white;
  border-radius: 8px;
  display: inline-block;
}

.qr-code-container img {
  max-width: 300px;
  height: auto;
}

.alert-info {
  background-color: rgba(102, 126, 234, 0.1);
  border-color: var(--accent);
  color: var(--text-primary);
}

.alert-warning {
  background-color: rgba(245, 158, 11, 0.1);
  border-color: var(--warning);
  color: var(--text-primary);
}

.alert-success {
  background-color: rgba(16, 185, 129, 0.1);
  border-color: var(--success);
  color: var(--text-primary);
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.1);
  border-color: var(--danger);
  color: var(--text-primary);
}

textarea.form-control {
  resize: vertical;
}

.btn-group .btn {
  border-color: var(--accent);
}

.btn-group .btn.active {
  background-color: var(--accent);
  color: white;
}

@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    max-width: 250px;
  }
  
  .sidebar.collapsed {
    transform: translateX(-100%);
  }
  
  main.sidebar-open {
    margin-left: 0;
  }
  
  .hero-section {
    padding: 3rem 0;
  }
  
  .logo-placeholder-large {
    padding: 1rem 2rem;
    font-size: 1.5rem;
  }
  
  .address-box {
    font-size: 1rem;
  }
  
  .stat-card h2 {
    font-size: 2rem;
  }
}

@media (min-width: 769px) {
  main {
    margin-left: 250px;
  }
  
  .sidebar.collapsed {
    transform: translateX(-100%);
  }
  
  main.sidebar-collapsed {
    margin-left: 0;
  }
}