:root {
  --bg-color: #e5e4e2;         /* Silver Mist */
  --text-color: #2f2f2f;       /* Dark Graphite */
  --button-bg: #c5c6c7;        /* Soft Platinum */
  --button-hover: #909497;     /* Cool Pewter */
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
  }
  
  .logo {
    font-size: 1.8em;
    font-weight: bold;
    color: var(--text-color);
    text-decoration: none;
  }

  header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background-color: var(--button-bg);
  }

  .top-nav {
    display: flex;
    align-items: center;
    gap: 15px;
  }
  
  .nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: bold;
    padding: 6px 12px;
    border-radius: 4px;
    transition: all 0.3s ease;
  }

  .nav-link:hover {
    background-color: var(--button-hover);
    color: var(--bg-color);
  }

  .nav-bar {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    background-color: #c5c6c7;
    padding: 20px 40px;
    /* box-shadow: 0 4px 8px rgba(0,0,0,0.1); */
  }
  
  .navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--button-bg);
    padding: 20px 40px;
    flex-wrap: wrap;
  }
  
  .nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
  }
  
  .nav-btn {
    text-decoration: none;
    padding: 8px 16px;
    background-color: var(--button-bg);
    color: var(--text-color);
    border-radius: 6px;
    font-weight: 500;
    transition: background-color 0.3s ease, transform 0.2s ease;
    border: none;
    font-size: 15px;
  }


.nav-btn:hover {
  background-color: var(--button-hover);
  color: white;
  transform: scale(1.03);
}

  .nav-right a:hover {
    color: #d75d35;
  }
  
  .leaderboard-container {
    max-width: 600px;
    margin: 40px auto;
    text-align: center;
    background: #fffef9;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  }
  
  .leaderboard-toggle {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
  }
  
  .leaderboard-toggle button {
    padding: 10px 20px;
    margin: 0 10px;
    color: var(--text-color);
    background: var(--button-bg);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.3s ease, transform 0.3s ease;
  }
  
  .leaderboard-toggle button:active {
    transform: scale(0.97);
  }
  .leaderboard-toggle button:hover {
    background: var(--text-color);
  color: var(--bg-color);
  transform: scale(1.03);
  }
  
  #leaderboard-list {
    list-style: none;
    padding: 0;
  }
  
  #leaderboard-list li {
    padding: 10px;
    border-bottom: 1px solid #ddd;
  }
  .hidden {
    display: none;
  }
  
   /* profile popup */
   .hidden {
    display: none !important;
  }
  
  .profile-tab {
    position: relative;
    font-weight: bold;
    text-transform: uppercase;
    background-color: var(--button-bg);
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
  }
  
  .profile-tab:hover {
    background-color: var(--button-hover);
  }
  
  .profile-dropdown {
    position: absolute;
    top: 120%;
    right: 0;
    background-color: var(--button-bg);
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    z-index: 100;
    width: 220px;
    text-align: left;
  }
  
  .profile-dropdown p {
    margin: 8px 0;
    font-size: 0.9em;
  }
  
  .profile-dropdown button {
    margin-top: 10px;
    width: 100%;
    padding: 8px;
    border: none;
    background-color: #d9534f;
    color: white;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
  }
  
  .profile-dropdown button:hover {
    background-color: #c9302c;
  }