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

body {
  --sb-width: 5rem;
  font-family: system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #333;
  background-color: #fff;
}

body.sb-expanded {
  --sb-width: 12.5rem;
}

h1 {
  font-size: 1.5rem;
  font-weight: bold;
}

p {
  margin-bottom: 1.5rem;
}

aside {
  position: fixed;
  /* top: 0;
  left: 0;
  bottom: 0; */
  inset: 0 auto 0 0;
  padding: 1rem;
  /* width: 80px; */
  width: var(--sb-width);
  background-image: linear-gradient(#90c3fd, #ba71ff, #ff71b8);
  transition: width 0.5s ease-in-out;
}

nav {
  height: 100%;
  /* border: 1px solid #000; */
}

nav ul {
  list-style: none;
  height: 100%;
  display: flex;
  flex-flow: column;
  gap: 0.25rem;
}

nav li:last-child {
  margin-top: auto;
}

nav a {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.625rem 0.875rem;
  font-size: 1.25rem;
  line-height: 1;
  color: #fff;
  text-decoration: none;
  border-radius: 0.375rem;
  transition: background-color 0.5s ease-in-out, color 0.5s ease-in-out;
}

nav a.active,
nav a:hover,
nav a:focus-visible {
  outline: none;
  color: #b366fc;
  background-color: #fff;
}

nav a span {
  font-size: 0.875rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease-in-out, visibility 0.3s ease-in-out;
}

.sb-expanded nav a span {
  opacity: 1;
  visibility: visible;
}

.sb-expanded aside .bx-chevrons-right {
  rotate: 180deg;
}

main {
  margin-left: 5rem;
  padding: 1rem 2rem;
  transition: margin-left 0.5s ease-in-out;
}

@media (min-width: 768px) {
  main {
    margin-left: var(--sb-width);
  }
}

.placeholder {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.625rem;
  min-height: 600px;
}

.placeholder > div {
  background-color: rgb(238, 238, 252);
  border-radius: 0.375rem;
}

.ph-1 {
  grid-area: 1 / 1 / 2 / 3;
}

.ph-2 {
  grid-area: 1 / 3 / 2 / 4;
}

.ph-3 {
  grid-area: 2 / 1 / 3 / 2;
}

.ph-4 {
  grid-area: 2 / 2 / 3 / 4;
}

.ph-5 {
  grid-area: 3 / 1 / 4 / 2;
}

.ph-6 {
  grid-area: 3 / 2 / 4 / 3;
}

.ph-7 {
  grid-area: 3 / 3 / 4 / 4;
}

.ph-8 {
  grid-area: 4 / 1 / 5 / 4;
}