/* ==========================
   RESET & GLOBAL STYLES
   ========================== */
   * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: #f9f9f9;
    color: #003049;
  }
  
  /* ==========================
     HEADER
     ========================== */
  header {
    margin-bottom: 20px;
  }
  
  header h1,
  header h2,
  header h3 {
    background: linear-gradient(90deg, #669bbc, #3a7ca5);
    color: #ffffff;
    margin: 20px auto;
    padding: 15px;
    max-width: 1000px;
    text-align: center;
    border-radius: 8px;
    font-weight: 600;
  }
  
  header h1 {
    font-size: 48px;
  }
  
  header p {
    background-color: #003049;
    color: #ffffff;
    margin: 10px auto;
    padding: 10px;
    max-width: 1000px;
    text-align: center;
    font-size: 18px;
    border-radius: 4px;
  }
  
  /* ==========================
     NAVIGATION
     ========================== */
  nav {
    margin-bottom: 20px;
  }
  
  nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 20px 0;
    margin: 0;
    background-color: #f4f4f4;
  }
  
  nav li {
    margin: 0;
    padding: 0;
  }
  
  nav a {
    color: #003049;
    text-decoration: none;
    font-size: 18px;
    padding: 8px 12px;
    display: inline-block;
    transition: all 0.3s ease;
    border-radius: 4px;
  }
  
  nav a:hover {
    background-color: #669bbc;
    color: #ffffff;
  }
  
  /* ==========================
     MAIN CONTENT
     ========================== */
  main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
  }
  
  main section {
    margin-bottom: 40px;
  }
  
  /* ==========================
     CAROUSEL (Index Page)
     ========================== */
  .carousel {
    position: relative;
    max-width: 100%;
    margin: 20px auto;
    text-align: center;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
  }
  
  .carousel img {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    display: block;
  }
  
  .carousel button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.4);
    color: #ffffff;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    padding: 10px 16px;
    border-radius: 50%;
    transition: background 0.3s;
  }
  
  .carousel button:hover {
    background: rgba(0,0,0,0.7);
  }
  
  .carousel .prev {
    left: 10px;
  }
  
  .carousel .next {
    right: 10px;
  }
  
  /* ==========================
     TREANT.JS FAMILY TREE
     ========================== */
  .tree {
    overflow-x: auto;
    padding-bottom: 20px;
  }
  
  #tree-simple {
    width: 100%;
    margin: 0 auto;
  }
  
  .tree .member {
    width: 120px;
    min-height: 60px;
    background: linear-gradient(135deg, #669bbc, #3a7ca5);
    color: #ffffff;
    border: 2px solid #003049;
    border-radius: 10px;
    padding: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    font-size: 12px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
  }
  
  .tree .member:hover {
    transform: scale(1.08);
    background: linear-gradient(135deg, #3a7ca5, #669bbc);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.5);
    cursor: pointer;
  }
  
  .tree .member a {
    color: inherit;
    text-decoration: none;
    display: block;
    width: 100%;
    height: 100%;
  }
  
  /