/* Define CSS variables for light and dark themes */
:root {
  --background-color: #f4f7f9;
  --text-color: #2c3e50;
  --secondary-text-color: #6c757d;
  --container-bg-color: #ffffff;
  --border-color: #e0e4e8;
  --accent-color: #3498db;
  --accent-hover-color: #2980b9;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --header-height: 116px;
  --border-radius: 12px;
  --transition-speed: 0.3s;
}

[data-theme="dark"] {
  --background-color: #121c26;
  --text-color: #e6e6e6;
  --secondary-text-color: #a0a0a0;
  --container-bg-color: #1e2b37;
  --border-color: #2c3e50;
  --accent-color: #3498db;
  --accent-hover-color: #2980b9;
  --shadow-color: rgba(255, 255, 255, 0.05);
}

/* Overall body styling */
body {
  font-family: 'Inter', 'Arial', sans-serif;
  background-color: var(--background-color);
  margin: 0;
  padding: 20px;
  color: var(--text-color);
  padding-top: 70px;
  padding-bottom: 60px;
  line-height: 1.6;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

/* Header styling */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--container-bg-color);
  padding: 15px 0;
  box-shadow: 0 4px 6px var(--shadow-color);
  text-align: center;
}

header h1, header p {
  margin: 0 auto; /* Center content horizontally */
  display: block; /* Ensure block-level for proper text alignment */
  width: fit-content; /* Adjust width to the content size */
  padding-bottom: 10px;
}

header h1 {
  color: var(--accent-color);
  font-weight: 600;
  margin-bottom: 5px;
  letter-spacing: -0.5px;
}

header p {
  color: var(--secondary-text-color);
  font-size: 0.9rem;
}

/* Main content area */
main {
  background-color: var(--container-bg-color);
  border-radius: var(--border-radius);
  padding: 20px;
  margin-top: var(--header-height);
  margin-bottom: 30px;
  box-shadow: 0 4px 6px var(--shadow-color);
  border: 1px solid var(--border-color);
  transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
}

/* List styles */
ul {
  list-style: none;
  padding: 0;
}

li {
  border-bottom: 1px solid var(--border-color);
  padding: 12px;
  margin-bottom: 8px;
  border-radius: 8px;
  transition: background-color var(--transition-speed);
}

li:hover {
  background-color: rgba(52, 152, 219, 0.05);
}

/* Checkbox styles */
input[type="checkbox"] {
  margin-right: 10px;
}

/* Label styling to improve click area and usability */
label {
  color: var(--secondary-text-color);
  cursor: pointer;
  display: block; /* Makes the label more clickable */
}

/* Footer styling */
footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  text-align: center;
  padding: 10px 20px;
  background-color: var(--container-bg-color);
  border-top: 1px solid var(--border-color);
  box-shadow: 0 -4px 6px var(--shadow-color);
  z-index: 1000;
  transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
}

footer p {
  color: var(--secondary-text-color);
  font-size: 0.8rem;
}

/* Theme toggle button */
#themeToggle {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 24px;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  transition: background-color var(--transition-speed), transform var(--transition-speed);
}

#themeToggle:hover {
  background-color: rgba(52, 152, 219, 0.1);
  transform: scale(1.1);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  :root {
    --header-height: 165px;
  }

  body {
    padding-top: var(--header-height);
    padding: 10px;
  }

  main {
    padding: 15px;
    margin-bottom: 70px;
  }

  header, footer {
    padding: 10px;
  }

  li {
    padding: 10px;
  }

  #themeToggle:hover {
    transform: none;
    background-color: transparent;
  }
}