.app {
  display: flex;
  min-height: 100vh;
}
.app-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow-x: hidden;
}
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: sticky;
  top: 0;
  flex-shrink: 0;
}
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 77px; 
  padding: 0 var(--space-3);
  border-bottom: 1px solid var(--color-border);
  box-sizing: border-box;
}
.sidebar-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  width: 100%;
}
.sidebar-logo-link {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: opacity var(--transition-fast);
  min-width: 44px;
  min-height: 44px;
}
.sidebar-logo-link:hover {
  opacity: 0.9;
}
.sidebar-logo-divider {
  width: 1px;
  height: 40px;
  background-color: var(--color-border);
}
.sidebar-logo-image {
  height: 48px;
  width: auto;
  object-fit: contain;
}
.sidebar-logo-image.secondary {
  height: 34px;
}
.sidebar-nav {
  flex: 1;
  padding: var(--space-3);
  overflow-y: auto;
}
.sidebar-section {
  margin-bottom: var(--space-4);
}
.sidebar-section-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-2) var(--space-3);
}
.sidebar-menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.sidebar-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  min-height: 44px;
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
}
.sidebar-item:hover {
  background-color: var(--color-hover);
  color: var(--color-text-primary);
}
.sidebar-item.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}
.sidebar-item-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}
.sidebar-item-text {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sidebar-submenu {
  margin-left: var(--space-6);
  margin-top: var(--space-1);
  padding-left: var(--space-3);
  border-left: 1px solid var(--color-border);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}
.sidebar-submenu.open {
  max-height: 500px; 
}
.sidebar-submenu .sidebar-item {
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-sm);
}
.submenu-icon {
  transition: transform var(--transition-fast);
}
.sidebar-item.has-submenu[aria-expanded="true"] .submenu-icon {
  transform: rotate(180deg);
}
.sidebar-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
}
.sidebar-role-switcher {
  margin-bottom: var(--space-3);
}
.sidebar-role-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  display: block;
}
.sidebar-role-select {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.sidebar-role-select:hover {
  border-color: var(--color-accent);
  background-color: var(--color-hover);
}
.sidebar-role-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}
.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  width: 100%;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}
.sidebar-user:hover {
  background-color: var(--color-hover);
}
.sidebar-user-info {
  flex: 1;
  min-width: 0;
}
.sidebar-user-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sidebar-user-email {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sidebar-settings-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  margin-top: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: color var(--transition-fast);
  width: 100%;
  text-align: center;
}
.sidebar-settings-link:hover {
  color: var(--color-text-primary);
}
.sidebar-year {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  text-align: center;
  margin-top: var(--space-3);
}
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-sticky) - 1);
  opacity: 0;
  transition: opacity var(--transition-base);
}
.sidebar-overlay.open {
  display: block;
  opacity: 1;
}
.sidebar-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--color-text-primary);
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}
.sidebar-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
@media (max-width: 768px) {
  .sidebar-toggle {
    display: inline-flex;
  }
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    z-index: var(--z-sticky);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .sidebar:not(.open) .sidebar-submenu {
    max-height: 0 !important;
  }
  .sidebar:not(.open) .sidebar-submenu.open {
    opacity: 0;
  }
  .hide-desktop {
    display: inline-flex !important;
  }
}
@media (min-width: 769px) {
  .hide-desktop {
    display: none !important;
  }
  .sidebar-overlay {
    display: none !important;
  }
}
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-4);
  height: 77px; 
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  box-sizing: border-box;
}
.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.header-title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  line-height: 24px; 
}
.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.header-date {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.public-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  height: 77px; 
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-sizing: border-box;
}
.public-header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.public-header-logo .logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}
.public-header-logo .logo-plenup {
  height: 56px;
  width: auto;
  object-fit: contain;
}
.public-header-logo .logo-divider {
  width: 1px;
  height: 40px;
  background-color: var(--color-border);
}
.public-header-logo .logo-school {
  height: 35px;
  width: auto;
  object-fit: contain;
}
.public-header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.main {
  flex: 1;
  padding: var(--space-6);
}
.main-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}
.main-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}
.main-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}
.section {
  margin-bottom: var(--space-8);
}
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}
.section-title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}
.grid {
  display: grid;
  gap: var(--space-4);
}
.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}
.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}
.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}
.flex {
  display: flex;
}
.flex-col {
  flex-direction: column;
}
.items-center {
  align-items: center;
}
.items-start {
  align-items: flex-start;
}
.items-end {
  align-items: flex-end;
}
.justify-center {
  justify-content: center;
}
.justify-between {
  justify-content: space-between;
}
.justify-end {
  justify-content: flex-end;
}
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.container {
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.centered-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.centered-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
}
@media (max-width: 640px) {
  .public-header {
    flex-direction: column;
    height: auto;
    padding: var(--space-3) var(--space-4);
    gap: var(--space-3);
  }
  .public-header-logo {
    justify-content: center;
    flex-wrap: wrap;
  }
  .public-header-logo .logo-plenup {
    height: 40px;
  }
  .public-header-logo .logo-school {
    height: 28px;
  }
  .public-header-logo .logo-divider {
    height: 28px;
  }
  .public-header-nav {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }
  .public-header-nav .btn {
    min-height: 44px;
    flex: 1;
    min-width: 0;
  }
  .session-anon {
    display: flex;
    width: 100%;
    gap: var(--space-2);
  }
  .session-anon .btn {
    flex: 1;
  }
  .main-header {
    flex-direction: column;
    gap: var(--space-3);
    align-items: stretch;
  }
  .main-header .header-right,
  .main-header > :last-child:not(.main-title):not(.main-subtitle) {
    align-self: stretch;
  }
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }
  .centered-content {
    padding: var(--space-4);
  }
  .container {
    padding: 0 var(--space-4);
  }
  .header {
    padding: 0 var(--space-3);
    gap: var(--space-2);
  }
  .header-title {
    font-size: var(--font-size-base);
  }
}
@media (max-width: 768px) {
  .public-header-nav {
    gap: var(--space-2);
  }
  .public-header-nav .btn {
    min-height: 44px;
  }
  .sidebar {
    position: fixed;
    left: -100%;
    z-index: var(--z-fixed);
    transition: left var(--transition-base);
  }
  .sidebar.open {
    left: 0;
  }
  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-fixed) - 1);
  }
  .sidebar-overlay.open {
    display: block;
  }
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
  .main {
    padding: var(--space-4);
    overflow-x: hidden;
  }
  .flex-wrap-mobile {
    flex-wrap: wrap;
  }
}
@media (max-width: 1024px) {
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .main {
    padding: var(--space-5, 1.25rem);
  }
}
@media (min-width: 769px) {
  .grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1025px) {
  .grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}
@media (min-width: 1280px) {
  .container {
    max-width: var(--content-max-width);
    padding: 0 var(--space-8);
  }
  .main {
    padding: var(--space-8);
  }
}