index.css

:root {
  --primary-color: #2f78ff;
}
* {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
#app :not(h1) {
  /* make it flex and make it so that each row has 4 boxes */

  /* add some padding and margin */
  padding: 20px;
  margin: 0;
  max-width: 800px;
  /* add spacing between each box */
}

.devices {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px;
}

#main {
  position: relative;
  left: calc(80px + 1%);
  top: 0;
  min-height: 100vh;
  width: calc(100% - calc(80px + 1%));
  transition: all 0.5s ease;
}

.device {
  /* add some padding and margin */
  padding: 20px;
  margin: 0;
  /* add a border */
  border: 1px solid #ccc;
  border-radius: 5px;
  /* make it flex */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  /* make each box have the exact same size */
  flex: 1;
  /* make it slightly bigger */
  min-width: 200px;
  min-height: 180px;
  /* add a shadow */
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.op-btn {
  /* add some padding */
  padding: 10px;
  /* add some margin */
  margin: 10px 0;
  /* add a border */
  border: 1px solid #c9daf9;
  border-radius: 5px;
  /* add a background color */
  background-color: var(--primary-color);
  color: #fff;
  min-width: 4.5rem;
  /* add a hover effect */
  transition: background-color 0.3s;
  display: flex;
  gap: 10px;
  flex-wrap: nowrap;
  font-size: 0.9rem;
}
/* .op-btn > i {
  font-size: 1.2rem;
} */
.op-btn:hover {
  background-color: #4787fd;
  cursor: pointer;
}

.sp {
  display: flex;
  justify-content: space-around;
  gap: 2em;
}

.category-title {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.inp {
  margin-top: 0.3rem;
  margin-bottom:0.3rem;
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 80px;
  background-color: var(--primary-color);
  padding: 0.4rem 0.8rem;
  transition: all 0.5s ease;
  z-index: 2;
}

.sidebar.active ~ #main {
  width: calc(100% - calc(250px + 1%));
  left: calc(250px + 1%);
  transition: all 0.5s ease;
}

.sidebar.active {
  width: 250px;
}

.sidebar #btn {
  position: absolute;
  color: #fff;
  top: 0.4rem;
  left: 50%;
  font-size: 1.2rem;
  line-height: 50px;
  transform: translateX(-50%);
  cursor: pointer;
  /* transition: all 0.5s ease; */
}

.sidebar.active #btn {
  left: 90%;
  transition: all 0.5s ease;
}

.sidebar ul li {
  position: relative;
  list-style: none;
  height: 50px;
  width: 90%;
  margin: 0.8rem auto;
  line-height: 50px;
}

.sidebar ul li a {
  color: #fff;
  display: flex;
  align-items: center;
  text-decoration: none;
  border-radius: 0.8rem;
}

.sidebar ul li:hover a, .sidebar ul li.active a {
  background-color: #fff;
  color: #2f78ff;
}
.nav-item:hover,
.siderbar.active .tooltip:hover {
  cursor: pointer !important;
}

.sidebar .tooltip:hover {
  cursor: initial;
}

.sidebar .top .logo {
  color: #fff;
  display: flex;
  height: 50px;
  width: 100%;
  align-items: center;
  pointer-events: none;
  opacity: 0;
}

.sidebar.active .top .logo {
  opacity: 1;
}

.top .logo i {
  font-size: 2rem;
  margin-right: 5px;
}

.sidebar p {
  opacity: 0;
}

.sidebar.sidebar p {
  opacity: 1;
}

.nav-item,
.top .logo span {
  white-space: nowrap;
  overflow: hidden;
  transition: all 0.5s ease;
}

.sidebar ul li .tooltip {
  position: fixed;
  left: 6rem;
  background: #fff;
  box-shadow: 0 0.5rem 0.8rem rgba(0, 0, 0, 0.2);
  border-radius: 0.6rem;
  padding: 0.4rem 1.2rem;
  line-height: 1.8rem;
  display: none;
}

.sidebar ul li:hover .tooltip {
  display: inline;
}

.sidebar.active ul li .tooltip {
  opacity: 0;
}

.sidebar ul li a i {
  min-width: 50px;
  text-align: center;
  height: 50px;
  border-radius: 12px;
  line-height: 50px;
}
.sidebar .nav-item {
  display: none;
}

.sidebar.active .nav-item {
  display: inline-block;
}