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

/* Body styling */
body {
  font-family: Arial, Helvetica, sans-serif;
  background: #f8f9fa;
  color: #222;
  line-height: 1.6;
  padding: 20px;
}

/* Header */
header {
  text-align: center;
  margin-bottom: 30px;
}

.gpd-header-main {
  font-size: 2.5rem; /* main title size */
  text-align: center;
  color: #2b2d42;
  margin-bottom: 10px;
}

.gpd-header-sub {
  font-size: 1.8rem; /* slightly smaller */
  text-align: center;
  color: #1a73e8;
  margin-top: 0;
}

/* Section Titles */
.gpd-text h2 {
  font-size: 1.5rem;
  color: #1a73e8;
  margin-bottom: 8px;
  margin-top: 25px;
  border-left: 4px solid #1a73e8;
  padding-left: 10px;
}

/* Paragraphs */
.gpd-text p {
  font-size: 1rem;
  margin-bottom: 15px;
  color: #333;
  max-width: 800px;
}

/* Main container */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

/* Last updated footer */
.last-updated {
  margin-top: 40px;
  text-align: center;
  color: #555;
  font-size: 0.9rem;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  body {
    background-color: #121212;
    color: #e0e0e0;
  }

  main {
    background-color: #1e1e1e;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  }

  .gpd-header-main {
    color: #ffffff;
  }

  .gpd-header-sub {
    color: #90caf9;
  }

  .gpd-text h2 {
    color: #90caf9;
    border-left-color: #90caf9;
  }

  .gpd-text p {
    color: #e0e0e0;
  }

  .last-updated {
    color: #aaa;
  }
}