:root {
  --sidebar-width: 250px;
  --sidebar-collapsed-width: 60px;
  --sidebar-background: rgba(51, 0, 0, 0.88);
  --page-background: floralwhite;
  --page-text: #1a1a1a;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  background-color: var(--page-background);
  color: var(--page-text);
  font-family: "Playfair Display", serif;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 10;
  width: var(--sidebar-width);
  height: 100vh;
  padding: 60px 20px 20px;
  overflow-y: auto;
  background-color: var(--sidebar-background);
  border-right: 2px solid floralwhite;
  transition: width 0.3s ease;
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar nav {
  display: flex;
  flex-direction: column;
}

.sidebar a,
.dropdown-btn,
.nav-button {
  display: block;
  width: 100%;
  padding: 10px 0;
  overflow: hidden;
  border: 0;
  background: transparent;
  color: floralwhite;
  font: inherit;
  font-size: 1.1rem;
  text-align: left;
  text-decoration: none;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
}

.sidebar a:hover,
.sidebar a:focus-visible,
.dropdown-btn:hover,
.dropdown-btn:focus-visible,
.nav-button:hover,
.nav-button:focus-visible {
  background-color: rgba(51, 0, 0, 0.66);
  outline: none;
}

.nav-form {
  margin: 0;
}

.sidebar.collapsed a,
.sidebar.collapsed .dropdown-btn,
.sidebar.collapsed .nav-button {
  padding: 8px 0;
  font-size: 0;
}

.toggle-btn {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 20;
  padding: 4px;
  border: 0;
  background: transparent;
  color: floralwhite;
  font-size: 24px;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.sidebar.collapsed .toggle-btn {
  transform: rotate(180deg);
}

.dropdown {
  margin-top: 10px;
}

.dropdown-content {
  display: none;
  flex-direction: column;
  margin-left: 10px;
}

.dropdown.active .dropdown-content {
  display: flex;
}

.sidebar.collapsed .dropdown-content {
  display: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  margin-left: var(--sidebar-width);
  padding: 10px 20px;
  background-color: floralwhite;
  font-size: 2rem;
  text-align: center;
  transition: margin-left 0.3s ease;
}

.site-header a {
  color: inherit;
  text-decoration: none;
}

.site-main {
  min-height: 100vh;
  margin-left: var(--sidebar-width);
  transition: margin-left 0.3s ease;
}

.sidebar.collapsed ~ .site-header,
.sidebar.collapsed ~ .site-main {
  margin-left: var(--sidebar-collapsed-width);
}

.home-main {
  display: grid;
  place-items: center;
  padding: 2rem;
}

.home-main h1 {
  margin: 0;
}

.flash-stack {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.flash-message {
  padding: 10px 12px;
  border-radius: 6px;
  background: white;
}

.flash-danger {
  background: #ffd6d6;
}

.flash-warning {
  background: #fff0c2;
}

.flash-success {
  background: #d8f3dc;
}

@media (max-width: 768px) {
  :root {
    --sidebar-width: 200px;
  }
}

@media (max-width: 480px) {
  :root {
    --sidebar-width: 180px;
  }
}