:root {
  --bg-color: #0f0f0f;
  --card-bg: #1a1a2e;
  --accent: #6c63ff;
  --accent-hover: #5b54d6;
  --text-main: #e0e0e0;
  --text-muted: #8b8b99;
  --danger: #ff4757;
  --danger-hover: #ff3344;
  --success: #2ed573;
  --border: #2d2d44;
  --sidebar-width: 250px;
}

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

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

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

.sidebar {
  width: var(--sidebar-width);
  background-color: var(--card-bg);
  border-right: 1px solid var(--border);
  position: fixed;
  height: 100vh;
  left: 0;
  top: 0;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease;
  z-index: 1000;
}

.sidebar-header {
  padding: 20px;
  font-size: 24px;
  font-weight: bold;
  text-align: center;
  border-bottom: 1px solid var(--border);
  color: var(--accent);
}

.sidebar-menu {
  list-style: none;
  padding: 20px 0;
  flex: 1;
}

.sidebar-menu li a {
  display: flex;
  align-items: center;
  padding: 15px 20px;
  color: var(--text-main);
  transition: all 0.2s ease;
  font-size: 16px;
}

.sidebar-menu li a:hover, .sidebar-menu li a.active {
  background-color: rgba(108, 99, 255, 0.1);
  color: var(--accent);
  border-left: 4px solid var(--accent);
}

.sidebar-menu li a span.icon {
  margin-right: 15px;
  font-size: 20px;
}

.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  padding: 30px;
  min-height: 100vh;
  transition: margin-left 0.3s ease;
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 24px;
  cursor: pointer;
  padding: 10px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.card {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.05);
  margin-bottom: 20px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.stat-value {
  font-size: 32px;
  font-weight: bold;
  margin-bottom: 5px;
  color: var(--accent);
}

.stat-label {
  color: var(--text-muted);
  font-size: 14px;
}

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

th, td {
  padding: 15px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 1px;
}

tbody tr:hover {
  background-color: rgba(255, 255, 255, 0.02);
}

.btn {
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: white;
}

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

.btn-danger { background-color: var(--danger); }
.btn-danger:hover { background-color: var(--danger-hover); }

.btn-success { background-color: var(--success); }
.btn-success:hover { background-color: #26b361; }

.btn-icon {
  padding: 8px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-main);
  border-radius: 6px;
}
.btn-icon:hover {
  background: rgba(255,255,255,0.1);
}

.badge {
  padding: 5px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: bold;
}
.badge-success { background-color: rgba(46, 213, 115, 0.2); color: var(--success); }
.badge-danger { background-color: rgba(255, 71, 87, 0.2); color: var(--danger); }
.badge-warning { background-color: rgba(255, 165, 2, 0.2); color: #ffa502; }

.progress-container {
  width: 100%;
  background-color: var(--border);
  border-radius: 10px;
  overflow: hidden;
  height: 10px;
  margin-top: 5px;
}

.progress-bar {
  height: 100%;
  background-color: var(--accent);
  transition: width 0.3s;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-muted);
}

.form-control {
  width: 100%;
  padding: 12px 15px;
  background-color: rgba(0,0,0,0.2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-main);
  font-size: 14px;
  transition: all 0.3s;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(108, 99, 255, 0.2);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background-color: var(--card-bg);
  width: 100%;
  max-width: 500px;
  border-radius: 12px;
  padding: 30px;
  transform: translateY(-20px);
  transition: transform 0.3s;
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
}

/* Toasts */
#toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background-color: var(--card-bg);
  color: var(--text-main);
  padding: 15px 20px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  border-left: 4px solid var(--accent);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.3s ease forwards;
}

.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.fade-out { animation: fadeOut 0.3s ease forwards; }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOut {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(100%); opacity: 0; }
}

/* Auth pages */
.auth-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  width: 100%;
  background-color: var(--bg-color);
}

.auth-card {
  width: 100%;
  max-width: 400px;
  padding: 40px;
  text-align: center;
}

.auth-logo {
  font-size: 48px;
  margin-bottom: 10px;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.active {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
  }
  .mobile-nav-toggle {
    display: block;
  }
}