body {
    font-family: "Hiragino Kaku Gothic ProN", sans-serif;
    background-color: #f6f6f6;
    margin: 0;
  }
  
a{
  text-decoration: none;
  color: #000000;

}
a:active {
  color: #000000;
}
a:focus {
  outline: none;
}

  header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 30px;
    background: #fff;
    border-bottom: 1px solid #ddd;
  }
  
  .logo-green {
    color: #9cd43f;
    font-weight: bold;
  }
  
  .logo-black {
    color: #333;
    font-weight: bold;
  }
  
  .search-area {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  
  .search-area input {
    width: 250px;
    padding: 8px 12px;
    border: 2px solid #ddd;
    border-radius: 20px;
    font-size: 14px;
  }
  
  .login-btn,
  .signup-btn,.logout-btn,.write-btn {
    padding: 6px 15px;
    border: 1px solid #ccc;
    border-radius: 10px;
    background: #f9f9f9;
    cursor: pointer;
  }
  
  .signup-btn {
    border-color: #a8d8ff;
    background: #e8f4ff;
  }
  .logout-btn {
    border-color:#ffa8a8 ;
    background: #ffe8e8;
  }
  .write-btn {
    border-color:#a8ffa8;
    background: #e8ffe8;
  }
  
  main {
    display: flex;
    max-width: 1300px;
    margin: 20px auto;
    gap: 20px;
  }
  
  .sidebar {
    width: 220px;
    background: #fff;
    padding: 15px;
    border-right: 1px solid #ddd;
  }
  
  .sidebar h2 {
    font-size: 16px;
    margin-bottom: 10px;
    border-bottom: 1px solid #ddd;
    padding-bottom: 5px;
  }
  
  .sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  
  .sidebar li {
    margin: 6px 0;
  }
  
  .sidebar a {
    text-decoration: none;
    color: #0074cc;
    font-size: 14px;
  }
  
  .sidebar a:hover {
    text-decoration: underline;
  }
  
  .content {
    flex: 1;
  }
  
  .card {
    background: #f7f7f7;
    padding: 15px 20px;
    border-radius: 5px;
    margin-bottom: 15px;
    border: 1px solid #e0e0e0;
  }
  
  .card h3 {
    margin: 0;
    color: #222;
  }
  
  .card .summary {
    margin: 5px 0 0;
    font-weight: bold;
  }
  
  .card p {
    margin: 4px 0;
    color: #444;
  }