:root {
  --primary-color: #3498db;
  --secondary-color: #2c3e50;
  --bg-color: #e8e8e8;
  --card-bg: #ffffff;
  --text-color: #333;
  --border-color: #9f9f9f;
  --success-color: #2ecc71;
  --warning-color: #f39c12;
  --danger-color: #e74c3c;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  height: 100vh;
}

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

h1 {
  color: var(--secondary-color);
  margin: 0;
}

.hidden {
  display: none !important;
}

.loading {
  font-style: italic;
  color: var(--primary-color);
}

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

.card {
  background: var(--card-bg);
  border-radius: 5px;
  padding: 20px;
  border: 1px solid var(--border-color);
}

.stat-card {
  text-align: center;
}

.stat-card h3 {
  margin: 0 0 10px 0;
  font-size: 0.9rem;
  color: #7f8c8d;
  text-transform: uppercase;
}

.stat-card p {
  margin: 0;
  font-size: 1rem;
  font-weight: bold;
  color: var(--secondary-color);
}

/* Content Grid */
.content-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 20px;
}

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

/* Lists */
.list-group {
  max-height: 600px;
  overflow-y: auto;
}

.list-item {
  padding: 12px;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: background-color 0.2s;
}

.list-item:hover {
  background-color: #f8f9fa;
}

.list-item:last-child {
  border-bottom: none;
}

.user-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.user-name {
  font-weight: 600;
}

.user-stats {
  font-size: 0.8rem;
  color: #7f8c8d;
}

/* Tasks */
.task-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.task-status {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-completed {
  background-color: var(--success-color);
}
.status-pending {
  background-color: var(--warning-color);
}

.task-content {
  flex-grow: 1;
}

.task-title {
  margin: 0;
  font-weight: 500;
}

.task-meta {
  font-size: 0.8rem;
  color: #95a5a6;
}

.priority-badge {
  font-size: 0.7rem;
  padding: 2px 6px;
  background-color: #eee;
  margin-right: 5px;
}

.priority-high {
  background-color: #fadbd8;
  color: #ff0000;
}
.priority-medium {
  background-color: #fdebd0;
  color: #d35400;
}
.priority-low {
  background-color: #d4efdf;
  color: #27ae60;
}

/* Controls */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
  border-bottom: 2px solid var(--bg-color);
  padding-bottom: 10px;
}

.controls button {
  background: none;
  border: 1px solid var(--border-color);
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
}

.controls button.active {
  background-color: var(--secondary-color);
  color: white;
  border-color: var(--secondary-color);
}