* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  background-color: #EAEAEA;
}

.top-buttons {
  display: flex;
  justify-content: flex-end;
  background-color: #EAEAEA;
  padding: 10px;
}

.history-button {
  margin-right: 10px;
}

.clear-button {
  background-color: #FF0000;
  color: #FFFFFF;
}

main {
  flex: 1;
  display: flex;
}

.menu {
  width: 60%;
  border: 1px solid rgba(0, 0, 0, 0.2);
  padding: 0;
  overflow: auto;
}

.order-management {
  width: 40%;
  border: 1px solid rgba(0, 0, 0, 0.2);
  padding: 10px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.order-list {
  flex-grow: 1;
  list-style: none;
  padding: 0;
}

.order-list li {
  font-size: 28px;
  padding-left: 0;
}

.delete-button {
  display: inline-block;
  padding: 5px 10px;
  font-size: 18px;
  margin-left: 10px;
  background-color: #ff0000;
  color: #fff;
  border: none;
  cursor: pointer;
}

.delete-button:hover {
  background-color: #cc0000;
}

nav {
  background-color: #F2F2F2;
  padding: 10px;
  white-space: nowrap;
  overflow-x: auto;
}

.navigation {
  list-style-type: none;
  padding: 0;
  margin: 0;
  display: inline-flex;
}

.navigation li {
  padding: 20px 20px;
  cursor: pointer;
  border-radius: 20px;
  margin-right: 10px;
}

.navigation li:hover {
  background-color: #CCCCCC;
}

footer {
  background-color: #F2F2F2;
  padding: 10px;
}

.checkout {
  display: flex;
  justify-content: flex-end;
  background-color: #EAEAEA;
  padding: 10px;
}

.subtotal {
  font-weight: bold;
  margin-right: 10px;
  font-size: 20px;
}

.checkout-button {
  background-color: #008000;
  color: #FFFFFF;
}

.menu-iframe {
  width: 100%;
  height: 100%;
}

.menu-content {
  flex-grow: 1;
  margin-top: 10px!important;
  margin-left: 10px;
  margin-right: 10px;
}

.quantity-popup {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 50%;
  height: 50%;
  padding: 10px;
  background-color: #ffffff;
  border: 1px solid #dddddd;
  border-radius: 5px;
  margin-top: 10%;
  margin-left: 25%;
}

.quantity-button {
  padding: 10px 20px;
  font-size: 36px;
  cursor: pointer;
}

.quantity-display {
  font-size: 36px;
  padding: 10px;
}

.confirm-button {
  display: block;
  margin: 10px;
  padding: 10px 20px;
  font-size: 36px;
  cursor: pointer;
}

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

li {
  padding-left: 20px;
}