* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  }
body {
  font-family: Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: #333;
  background-color: #fff;
  }

.full-container {
  width: 100%;
  margin: 0 auto;
  }

.hgroup {
  background-color: #CCCCCC;
  padding: 20px 0;
  text-align: center;
  }
.hgroup img {
  max-width: 100%;
  height: auto;
  }

nav {
  background-color: #f4f4f4;
  border-bottom: 1px solid #ddd;
  padding: 10px;
  }
nav p {
  font-size: 1.1em;
  font-weight: bold;
  color: #555;
  margin: 0;
  }

.page_main {
  max-width: 800px;
  margin: 20px auto;
  padding: 20px;
  }

.i {
  font-size: 1em;
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 4px;
  }
.bfull {
  display: block;
  width: 100%;
  box-sizing: border-box;
  }

.button {
  display: inline-block;
  background-color: #0073e6;
  color: #fff;
  border: none;
  padding: 10px 20px;
  margin: 10px auto;
  font-size: 1em;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  }
.button:hover {
  background-color: #005bb5;
  }

.copy_code {
  display: inline-block;
  background-color: #f9f9f9;
  border: 1px solid #e1e1e1;
  padding: 5px 8px;
  font-family: monospace;
  font-size: 0.95em;
  cursor: pointer;
  user-select: all;
  }

footer {
  margin-top: 30px;
  padding: 10px 0;
  border-top: 1px solid #ddd;
  text-align: center;
  }
footer p {
  font-size: 0.85em;
  color: #999;
  }

  .error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
  padding: 10px;
  margin-bottom: 1em;
  border-radius: 4px;
}

.success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
  padding: 10px;
  margin-bottom: 1em;
  border-radius: 4px;
}