/* Reset default browser styles for consistency */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Define harmonious color palette using CSS variables */
:root {
  --primary-color: #4A90E2;       /* Blue shade */
  --secondary-color: #50E3C2;     /* Teal shade */
  --background-color: #F5F7FA;    /* Light gray */
  --text-color: #4A4A4A;          /* Dark gray */
  --white-color: #FFFFFF;         /* Pure white */
}

/* Base body styles */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
}

/* Dashboard layout styling */
.dashboard {
  display: flex;
  min-height: 100vh;
}

/* Sidebar styling */
.sidebar {
  width: 250px;
  background-color: var(--primary-color);
  color: var(--white-color);
  padding: 20px;
  transition: width 0.3s;
}

.sidebar .logo {
  font-size: 24px;
  margin-bottom: 30px;
}

.sidebar ul {
  list-style-type: none;
}

.sidebar ul li {
  margin-bottom: 20px;
}

.sidebar ul li a {
  color: var(--white-color);
  text-decoration: none;
  font-size: 18px;
  transition: color 0.3s;
}

/* Sidebar link hover effect */
.sidebar ul li a:hover {
  color: var(--secondary-color);
  padding-left: 10px;
}

/* Main content area styling */
.main-content {
  flex: 1;
  padding: 40px;
}

/* Header section styling */
header h1 {
  font-size: 32px;
  margin-bottom: 10px;
}

header p {
  font-size: 18px;
  color: var(--text-color);
}

/* Widgets section layout */
.widgets {
  display: flex;
  margin-top: 30px;
  gap: 20px;
}

/* Individual widget styling */
.widget {
  background-color: var(--white-color);
  padding: 20px;
  border-radius: 8px;
  flex: 1;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s;
}

.widget h3 {
  font-size: 20px;
  margin-bottom: 10px;
  color: var(--primary-color);
}

.widget p {
  font-size: 28px;
  font-weight: bold;
}

/* Widget hover effect */
.widget:hover {
  transform: translateY(-5px);
}

/* Charts section layout */
.charts {
  display: flex;
  margin-top: 40px;
  gap: 20px;
}

/* Chart container styling */
.chart-container {
  background-color: var(--white-color);
  padding: 20px;
  border-radius: 8px;
  flex: 1;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* Responsive design for smaller screens */
@media (max-width: 768px) {
  .widgets, .charts {
      flex-direction: column;
  }

  .sidebar {
      width: 60px;
  }

  .sidebar .logo,
  .sidebar ul li a {
      display: none;
  }
}