n

HTML

CSS

ul {
    list-style: none;
    margin: 0;
    padding: 0;
  }

body {
    font-family: Arial, sans-serif;
  }

/* Menu chính */
  .menu {
    background: #333;
    display: flex;
  }

.menu > li {
    position: relative;
  }

.menu > li > a {
    display: block;
    padding: 15px 20px;
    color: white;
    text-decoration: none;
    white-space: nowrap;
  }

.menu > li:hover {
    background: #444;
  }

/* Dropdown menu */
  .submenu, .subsubmenu {
    position: absolute;
    background: #444;
    min-width: 150px;
    display: none;
    top: 100%;
    left: 0;
    z-index: 1000;
  }

/* Hiện submenu khi hover */
  .menu > li:hover > .submenu {
    display: block;
  }

/* Items trong submenu */
  .submenu li a {
    padding: 10px 15px;
    color: white;
    display: block;
    text-decoration: none;
  }

.submenu li:hover {
    background: #555;
  }

/* Subsubmenu (submenu của submenu) */
  .submenu li {
    position: relative;
  }

.subsubmenu {
    top: 0;
    left: 100%;
  }

/* Hiện subsubmenu khi hover */
  .submenu li:hover > .subsubmenu {
    display: block;
  }

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