* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: 'Helvetica', sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: #333;
  background-color: #fff;
}

body {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.container {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.main-content {
  display: flex;
  flex-grow: 1;
  overflow: hidden;
}

.sidebar {
  width: 300px;
  max-width: 300px;
  min-width: 200px;
  height: 100%;
  overflow-y: auto;
  background-color: #f7f7f7;
  border-right: 1px solid #ddd;
}

.content-area {
  flex-grow: 1;
  overflow-y: auto;
  padding: 20px;
}

@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid #ddd;
  }
  
  .main-content {
    flex-direction: column;
  }
  
  .content-area {
    padding: 10px;
  }
}

.overflow-auto {
  overflow: auto;
}

.overflow-hidden {
  overflow: hidden;
}

.z-index-1 {
  z-index: 1;
}

.z-index-2 {
  z-index: 2;
}

.position-relative {
  position: relative;
}


.display-block {
  display: block;
}

.display-flex {
  display: flex;
}

.display-grid {
  display: grid;
}