/* ============================================================================
   STUDENT DAILY PLANNER STYLES
   ============================================================================
   Clean, reusable layout with dark/light theme toggle, collapsible sidebar,
   and Student Daily Planner specific components.
   ============================================================================ */

@import url('colors.css');

/* ============================================================================
   GLOBAL STYLES
   ============================================================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--light-grey);
  color: var(--charcoal);
  line-height: 1.5;
  font-size: var(--font-size-base);
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

body.dark-theme {
  background-color: var(--bg-dark);
  color: var(--text-dark);
}

body.light-theme {
  background-color: var(--bg-light);
  color: var(--text-light);
}

/* ============================================================================
   SIDEBAR NAVIGATION
   ============================================================================ */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background-color: var(--sidebar-dark);
  color: var(--white);
  transition: transform var(--transition-speed);
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 1000;
  display: flex;
  flex-direction: column;
}

.sidebar.collapsed {
  transform: translateX(-100%);
}

.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

body.light-theme .sidebar {
  background-color: var(--sidebar-light);
  color: var(--charcoal);
  border-right: 1px solid var(--border-light);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-md);
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  height: var(--topbar-height);
  box-sizing: border-box;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 10;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--white);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  white-space: nowrap;
  transition: opacity var(--transition-speed);
}

.sidebar-brand i {
  font-size: 1.2rem;
  min-width: 20px;
}

.fixed-sidebar-toggle {
  width: 28px;
  height: 28px;
  background-color: var(--white);
  border: 1px solid var(--medium-grey);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-speed);
  flex-shrink: 0;
  margin-right: var(--spacing-sm);
}

body.dark-theme .fixed-sidebar-toggle {
  background-color: var(--sidebar-dark);
  border-color: var(--sidebar-border-dark);
}

.fixed-sidebar-toggle:hover {
  background-color: var(--light-grey);
  border-color: var(--primary-color);
}

body.dark-theme .fixed-sidebar-toggle:hover {
  background-color: var(--sidebar-hover-dark);
}

.fixed-sidebar-toggle i {
  font-size: 0.9rem;
  color: var(--charcoal);
  line-height: 1;
}

body.dark-theme .fixed-sidebar-toggle i {
  color: var(--white);
}

.sidebar-menu {
  list-style: none;
  padding: var(--spacing-sm) 0;
  margin: 0;
}

.sidebar-menu-item {
  position: relative;
}

.sidebar-menu-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.6rem 0.7rem;
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: all var(--transition-speed);
  white-space: nowrap;
  cursor: pointer;
  border-left: 2px solid transparent;
  font-size: 0.9rem;
}

body.light-theme .sidebar-menu-link {
  color: var(--charcoal);
}

.sidebar-menu-link i {
  font-size: 1rem;
  min-width: 20px;
  text-align: center;
}

.sidebar-menu-link:hover {
  background-color: var(--sidebar-hover-dark);
  color: var(--white);
  border-left-color: var(--primary-color);
}

body.light-theme .sidebar-menu-link:hover {
  background-color: var(--sidebar-hover-light);
  color: var(--primary-color);
}

.sidebar-menu-link.active {
  background-color: var(--sidebar-hover-dark);
  color: var(--primary-color);
  border-left-color: var(--primary-color);
  font-weight: 600;
}

body.light-theme .sidebar-menu-link.active {
  background-color: rgba(107, 190, 69, 0.1);
}

.sidebar-menu-text {
  flex: 1;
  white-space: nowrap;
}

.sidebar-menu-arrow {
  margin-left: auto;
  font-size: 0.8rem;
  transition: transform var(--transition-speed);
  flex-shrink: 0;
  min-width: 16px;
  text-align: right;
}

.sidebar-menu-item.open .sidebar-menu-arrow {
  transform: rotate(90deg);
}

.sidebar.collapsed .sidebar-menu-arrow {
  display: none;
}

.sidebar-submenu {
  list-style: none;
  padding: 0;
  margin: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-speed) ease;
  background-color: rgba(0, 0, 0, 0.2);
}

body.light-theme .sidebar-submenu {
  background-color: rgba(0, 0, 0, 0.03);
}

.sidebar-menu-item.open .sidebar-submenu {
  max-height: 500px;
}

.sidebar-submenu-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.5rem 0.7rem 0.5rem 2.5rem;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: all var(--transition-speed);
  white-space: nowrap;
  font-size: 0.85rem;
}

body.light-theme .sidebar-submenu-link {
  color: rgba(34, 34, 34, 0.8);
}

.sidebar-submenu-link:hover {
  background-color: var(--sidebar-hover-dark);
  color: var(--primary-color);
  padding-left: 2.75rem;
}

body.light-theme .sidebar-submenu-link:hover {
  background-color: var(--sidebar-hover-light);
}

.sidebar-submenu-link.active {
  color: var(--primary-color);
  font-weight: 600;
}

.sidebar.collapsed .sidebar-menu-item {
  position: relative;
}

.sidebar.collapsed .sidebar-submenu {
  position: absolute;
  left: 100%;
  top: 0;
  width: 155px;
  background-color: var(--sidebar-dark);
  box-shadow: var(--shadow-lg);
  border-radius: 0 5px 5px 0;
  max-height: none;
  display: none;
  z-index: 1001;
}

body.light-theme .sidebar.collapsed .sidebar-submenu {
  background-color: var(--sidebar-light);
  border: 1px solid var(--border-light);
}

.sidebar.collapsed .sidebar-menu-item:hover .sidebar-submenu {
  display: block;
}

.sidebar.collapsed .sidebar-submenu-link {
  padding: 0.5rem 0.7rem;
}

.sidebar.collapsed .sidebar-submenu-link:hover {
  padding-left: 0.95rem;
}

.sidebar-footer {
  position: sticky;
  bottom: 0;
  background-color: var(--sidebar-dark);
  border-top: 1px solid var(--sidebar-border-dark);
  padding: var(--spacing-sm);
}

body.light-theme .sidebar-footer {
  background-color: var(--sidebar-light);
  border-top: 1px solid var(--border-light);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.7rem;
  background-color: rgba(0, 0, 0, 0.2);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-speed);
}

body.light-theme .theme-toggle {
  background-color: rgba(0, 0, 0, 0.05);
}

.theme-toggle:hover {
  background-color: rgba(0, 0, 0, 0.3);
}

body.light-theme .theme-toggle:hover {
  background-color: rgba(0, 0, 0, 0.08);
}

.theme-toggle-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.8rem;
  white-space: nowrap;
}

body.light-theme .theme-toggle-label {
  color: var(--charcoal);
}

.sidebar.collapsed .theme-toggle-label span {
  display: none;
}

.toggle-switch {
  position: relative;
  width: 32px;
  height: 17px;
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 8.5px;
  transition: background-color var(--transition-speed);
}

.toggle-switch.active {
  background-color: var(--primary-color);
}

.toggle-switch-slider {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 13px;
  height: 13px;
  background-color: var(--white);
  border-radius: 50%;
  transition: transform var(--transition-speed);
}

.toggle-switch.active .toggle-switch-slider {
  transform: translateX(15px);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.5rem 0.7rem;
  margin-bottom: var(--spacing-xs);
  background-color: rgba(0, 0, 0, 0.2);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-speed);
}

body.light-theme .sidebar-user {
  background-color: rgba(0, 0, 0, 0.05);
}

.sidebar-user:hover {
  background-color: rgba(0, 0, 0, 0.3);
}

body.light-theme .sidebar-user:hover {
  background-color: rgba(0, 0, 0, 0.08);
}

.sidebar-user-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary-color);
}

.sidebar-user-info {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar.collapsed .sidebar-user-info {
  display: none;
}

.sidebar-user-name {
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--white);
  display: block;
}

body.light-theme .sidebar-user-name {
  color: var(--charcoal);
}

.sidebar-user-role {
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.6);
  display: block;
}

body.light-theme .sidebar-user-role {
  color: rgba(34, 34, 34, 0.6);
}

.sidebar-user-logout {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

body.light-theme .sidebar-user-logout {
  color: var(--charcoal);
}

.sidebar.collapsed .sidebar-user-logout {
  display: none;
}

/* ============================================================================
   TOP BAR
   ============================================================================ */
.topbar {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  height: var(--topbar-height);
  background-color: var(--white);
  border-bottom: 1px solid var(--medium-grey);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-md);
  z-index: 999;
  transition: left var(--transition-speed);
  box-shadow: var(--shadow-sm);
}

body.dark-theme .topbar {
  background-color: var(--sidebar-dark);
  border-bottom-color: var(--sidebar-border-dark);
}

.sidebar.collapsed ~ .topbar {
  left: 0;
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  font-size: 1.2rem;
  color: var(--charcoal);
  cursor: pointer;
  padding: var(--spacing-xs);
}

body.dark-theme .mobile-menu-toggle {
  color: var(--white);
}

.topbar-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.8rem;
  margin-right: auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  list-style: none;
  padding: 0;
  margin: 0;
  background: transparent;
}

.breadcrumb-item {
  color: var(--charcoal);
}

body.dark-theme .breadcrumb-item {
  color: rgba(255, 255, 255, 0.7);
}

.breadcrumb-item a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-speed);
}

.breadcrumb-item a:hover {
  color: var(--primary-dark);
}

.breadcrumb-item.active {
  color: var(--charcoal);
  font-weight: 600;
}

body.dark-theme .breadcrumb-item.active {
  color: var(--white);
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: var(--spacing-sm);
  color: rgba(0, 0, 0, 0.3);
}

body.dark-theme .breadcrumb-item + .breadcrumb-item::before {
  color: rgba(255, 255, 255, 0.3);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.topbar-action {
  position: relative;
  background: transparent;
  border: none;
  font-size: 1rem;
  color: var(--charcoal);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-speed);
}

body.dark-theme .topbar-action {
  color: var(--white);
}

.topbar-action:hover {
  background-color: var(--light-grey);
}

body.dark-theme .topbar-action:hover {
  background-color: var(--sidebar-hover-dark);
}

.topbar-action-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  background-color: var(--danger);
  color: var(--white);
  font-size: 0.65rem;
  padding: 0.15rem 0.35rem;
  border-radius: 10px;
  font-weight: 600;
  min-width: 18px;
  text-align: center;
}

/* ============================================================================
   MAIN CONTENT AREA
   ============================================================================ */
.main-wrapper {
  margin-left: var(--sidebar-width);
  margin-top: var(--topbar-height);
  transition: margin-left var(--transition-speed);
  min-height: calc(100vh - var(--topbar-height));
  position: relative;
}

.sidebar.collapsed ~ .main-wrapper {
  margin-left: 0;
}

.main-content {
  padding: var(--spacing-lg);
  background-color: var(--light-grey);
  min-height: calc(100vh - var(--topbar-height));
}

body.dark-theme .main-content {
  background-color: var(--bg-dark);
}

.page-header {
  margin-top: 0;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--primary-color);
}

.page-header h1 {
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xs);
}

body.dark-theme .page-header h1 {
  color: var(--primary-color);
}

.page-header p {
  color: var(--charcoal);
  font-size: 0.9rem;
  margin-bottom: 0;
  opacity: 0.8;
}

body.dark-theme .page-header p {
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================================================
   CARDS & COMPONENTS
   ============================================================================ */
.card-custom {
  background-color: var(--white);
  border: 1px solid var(--medium-grey);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-speed);
  margin-bottom: var(--spacing-md);
}

body.dark-theme .card-custom {
  background-color: var(--sidebar-dark);
  border-color: var(--sidebar-border-dark);
}

.card-custom:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-custom .card-header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--white);
  font-weight: 600;
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: none;
  border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
  font-size: 0.95rem;
}

.card-custom .card-body {
  padding: var(--spacing-md);
}

.stat-card {
  background-color: var(--white);
  border-left: 3px solid var(--primary-color);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-speed);
}

body.dark-theme .stat-card {
  background-color: var(--sidebar-dark);
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.stat-card .stat-icon {
  font-size: 2rem;
  color: var(--primary-color);
  opacity: 0.8;
}

.stat-card .stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin: var(--spacing-xs) 0;
}

body.dark-theme .stat-card .stat-value {
  color: var(--primary-color);
}

.stat-card .stat-label {
  font-size: 0.75rem;
  color: var(--charcoal);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.7;
}

body.dark-theme .stat-card .stat-label {
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================================================
   BUTTONS
   ============================================================================ */
.btn-primary-custom {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  border: none;
  color: var(--white);
  padding: 0.5rem 1rem;
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-speed);
  box-shadow: var(--shadow-sm);
  font-size: 0.9rem;
}

.btn-primary-custom:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  opacity: 0.9;
  color: var(--white);
}

.btn-check-out {
  background: linear-gradient(135deg, #3d7cc9 0%, #1e5490 100%);
  border: none;
  color: var(--white);
  padding: 0.35rem 0.7rem;
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-speed);
  font-size: 0.8rem;
}

.btn-check-out:hover {
  opacity: 0.9;
  color: var(--white);
}

.btn-check-in {
  background: linear-gradient(135deg, var(--secondary-color) 0%, #b89716 100%);
  border: none;
  color: var(--white);
  padding: 0.35rem 0.7rem;
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-speed);
  font-size: 0.8rem;
}

.btn-check-in:hover {
  opacity: 0.9;
  color: var(--white);
}

/* ============================================================================
   FORMS
   ============================================================================ */
.form-control,
.form-select {
  background-color: var(--white);
  border: 1px solid var(--medium-grey);
  border-radius: var(--border-radius-sm);
  padding: 0.4rem 0.7rem;
  transition: all var(--transition-speed);
  color: var(--charcoal);
  font-size: 0.9rem;
}

body.dark-theme .form-control,
body.dark-theme .form-select {
  background-color: var(--sidebar-dark);
  border-color: var(--sidebar-border-dark);
  color: var(--white);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(107, 190, 69, 0.25);
  background-color: var(--white);
}

body.dark-theme .form-control:focus,
body.dark-theme .form-select:focus {
  background-color: var(--sidebar-hover-dark);
}

.form-label {
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: var(--spacing-xs);
  font-size: 0.9rem;
}

body.dark-theme .form-label {
  color: var(--white);
}

/* ============================================================================
   TABLES
   ============================================================================ */
.table-custom {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

body.dark-theme .table-custom {
  background-color: var(--sidebar-dark);
}

.table-custom thead {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--white);
}

.table-custom thead th {
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.5px;
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
}

.table-custom tbody tr {
  transition: all var(--transition-speed);
  border-bottom: 1px solid var(--medium-grey);
}

body.dark-theme .table-custom tbody tr {
  border-bottom-color: var(--sidebar-border-dark);
}

.table-custom tbody tr:hover {
  background-color: var(--light-grey);
}

body.dark-theme .table-custom tbody tr:hover {
  background-color: var(--sidebar-hover-dark);
}

.table-custom tbody td {
  padding: var(--spacing-sm) var(--spacing-md);
  vertical-align: middle;
  color: var(--charcoal);
  font-size: 0.9rem;
}

body.dark-theme .table-custom tbody td {
  color: var(--white);
}

/* ============================================================================
   BADGES
   ============================================================================ */
.badge {
  font-size: 0.75rem;
  padding: 0.3rem 0.5rem;
  border-radius: 3px;
  font-weight: 600;
}

.badge-success {
  background-color: var(--success);
  color: var(--white);
}

.badge-warning {
  background-color: var(--warning);
  color: var(--white);
}

.badge-danger {
  background-color: var(--danger);
  color: var(--white);
}

.badge-info {
  background-color: var(--info);
  color: var(--white);
}

.badge-secondary {
  background-color: #6c757d;
  color: var(--white);
}

.badge-dark {
  background-color: #343a40;
  color: var(--white);
}

.subject-code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ============================================================================
   ALERTS
   ============================================================================ */
.alert-custom {
  border-radius: var(--border-radius-sm);
  border-left: 3px solid;
  padding: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: 0.9rem;
}

/* ============================================================================
   FOOTER
   ============================================================================ */
.footer {
  background-color: var(--charcoal);
  color: var(--white);
  padding: var(--spacing-md) 0;
  margin-top: var(--spacing-xl);
  text-align: center;
  font-size: 0.85rem;
}

body.dark-theme .footer {
  background-color: var(--sidebar-dark);
  border-top: 1px solid var(--sidebar-border-dark);
}

/* ============================================================================
   STUDENT DAILY PLANNER SPECIFIC COMPONENTS
   ============================================================================ */

/* Welcome Banner */
.welcome-banner {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--white);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md) var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.welcome-banner h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.welcome-banner p {
  margin-bottom: 0;
  opacity: 0.95;
}

/* Quick Actions */
.quick-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-lg);
}

.quick-action-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.75rem 1.25rem;
  border-radius: var(--border-radius-md);
  background-color: var(--white);
  color: var(--charcoal);
  border: 1px solid var(--medium-grey);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-speed);
  box-shadow: var(--shadow-sm);
}

body.dark-theme .quick-action-btn {
  background-color: var(--sidebar-dark);
  border-color: var(--sidebar-border-dark);
  color: var(--white);
}

.quick-action-btn:hover {
  background-color: var(--primary-color);
  color: var(--white);
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.quick-action-btn i {
  font-size: 1.1rem;
}

/* Subject Summary Row */
.subject-summary-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  background-color: var(--white);
  border: 1px solid var(--medium-grey);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-sm);
  transition: all var(--transition-speed);
}

body.dark-theme .subject-summary-row {
  background-color: var(--sidebar-dark);
  border-color: var(--sidebar-border-dark);
}

.subject-summary-row:hover {
  box-shadow: var(--shadow-sm);
}

.subject-summary-name {
  font-weight: 600;
  min-width: 140px;
}

.subject-summary-stat {
  text-align: center;
  min-width: 80px;
}

.subject-summary-stat .stat-number {
  display: block;
  font-weight: 700;
  font-size: 1rem;
}

.subject-summary-stat .stat-label {
  display: block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.8;
}

/* Dashboard Task Cards */
.task-card {
  background-color: var(--white);
  border: 1px solid var(--medium-grey);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-speed);
  position: relative;
}

body.dark-theme .task-card {
  background-color: var(--sidebar-dark);
  border-color: var(--sidebar-border-dark);
}

.task-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.task-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
}

.task-card-title {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0;
}

.task-card-due {
  font-size: 0.8rem;
  opacity: 0.8;
}

.task-card-desc {
  font-size: 0.85rem;
  opacity: 0.9;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--spacing-sm);
}

.task-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.task-card-actions .btn {
  padding: 0.2rem 0.4rem;
  font-size: 0.75rem;
}

/* Tabs */
.nav-tabs-custom {
  border-bottom: 1px solid var(--medium-grey);
  margin-bottom: var(--spacing-md);
}

body.dark-theme .nav-tabs-custom {
  border-bottom-color: var(--sidebar-border-dark);
}

.nav-tabs-custom .nav-link {
  color: var(--charcoal);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.5rem 1rem;
  border: none;
  border-bottom: 2px solid transparent;
  background: transparent;
}

body.dark-theme .nav-tabs-custom .nav-link {
  color: rgba(255, 255, 255, 0.8);
}

.nav-tabs-custom .nav-link.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
  background: transparent;
}

body.dark-theme .nav-tabs-custom .nav-link.active {
  color: var(--primary-color);
}

/* Calendar */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
  background-color: var(--medium-grey);
  border: 1px solid var(--medium-grey);
  border-radius: var(--border-radius-md);
  overflow: hidden;
}

body.dark-theme .calendar-grid {
  background-color: var(--sidebar-border-dark);
  border-color: var(--sidebar-border-dark);
}

.calendar-header-cell {
  background-color: var(--primary-color);
  color: var(--white);
  font-weight: 600;
  padding: var(--spacing-sm);
  text-align: center;
  font-size: 0.8rem;
}

.calendar-day {
  background-color: var(--white);
  min-height: 110px;
  padding: var(--spacing-xs);
  position: relative;
}

body.dark-theme .calendar-day {
  background-color: var(--sidebar-dark);
}

.calendar-day-number {
  font-weight: 600;
  font-size: 0.8rem;
  margin-bottom: var(--spacing-xs);
}

.calendar-day.today .calendar-day-number {
  background-color: var(--primary-color);
  color: var(--white);
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.calendar-day.other-month {
  background-color: var(--light-grey);
  opacity: 0.6;
}

body.dark-theme .calendar-day.other-month {
  background-color: rgba(0, 0, 0, 0.2);
}

.calendar-event {
  font-size: 0.7rem;
  padding: 0.15rem 0.3rem;
  border-radius: 3px;
  margin-bottom: 0.15rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
}

.calendar-event.completed {
  background-color: rgba(46, 125, 50, 0.15);
  color: var(--success);
  border-left: 2px solid var(--success);
}

.calendar-event.in-progress {
  background-color: rgba(214, 179, 24, 0.15);
  color: var(--warning);
  border-left: 2px solid var(--warning);
}

.calendar-event.not-started {
  background-color: rgba(108, 117, 125, 0.15);
  color: #6c757d;
  border-left: 2px solid #6c757d;
}

body.dark-theme .calendar-event.not-started {
  color: rgba(255, 255, 255, 0.7);
}

/* Progress Bar */
.progress-custom {
  height: 8px;
  border-radius: 4px;
  background-color: var(--medium-grey);
}

.progress-custom .progress-bar {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  border-radius: 4px;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 1.5rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0.5rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--medium-grey);
}

body.dark-theme .timeline::before {
  background-color: var(--sidebar-border-dark);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--spacing-md);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.15rem;
  top: 0.25rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--primary-color);
}

.timeline-date {
  font-size: 0.75rem;
  opacity: 0.8;
  margin-bottom: var(--spacing-xs);
}

.timeline-content {
  background-color: var(--white);
  border: 1px solid var(--medium-grey);
  border-radius: var(--border-radius-sm);
  padding: var(--spacing-sm);
}

body.dark-theme .timeline-content {
  background-color: var(--sidebar-dark);
  border-color: var(--sidebar-border-dark);
}

/* Modal */
.modal-content {
  background-color: var(--white);
  border: 1px solid var(--medium-grey);
  border-radius: var(--border-radius-md);
}

body.dark-theme .modal-content {
  background-color: var(--sidebar-dark);
  border-color: var(--sidebar-border-dark);
}

.modal-header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--white);
  border-bottom: none;
  border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
}

.modal-header .btn-close {
  filter: invert(1) grayscale(100%) brightness(200%);
}

/* Chart Container */
.chart-container {
  position: relative;
  height: 280px;
  width: 100%;
}

/* Filter Bar */
.filter-bar {
  background-color: var(--white);
  border: 1px solid var(--medium-grey);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

body.dark-theme .filter-bar {
  background-color: var(--sidebar-dark);
  border-color: var(--sidebar-border-dark);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--spacing-xl);
  color: rgba(0, 0, 0, 0.5);
}

body.dark-theme .empty-state {
  color: rgba(255, 255, 255, 0.5);
}

.empty-state i {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-speed);
  }

  .sidebar.mobile-open {
    transform: translateX(0);
  }

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

  .topbar {
    left: 0;
  }

  .main-wrapper {
    margin-left: 0;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .page-header h1 {
    font-size: 1.25rem;
  }

  .main-content {
    padding: var(--spacing-md);
  }

  .stat-card .stat-value {
    font-size: 1.5rem;
  }

  .stat-card .stat-icon {
    font-size: 1.75rem;
  }

  .subject-summary-row {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }

  .subject-summary-stat {
    min-width: 60px;
  }

  .calendar-day {
    min-height: 80px;
  }
}

@media (max-width: 576px) {
  .topbar {
    padding: 0 var(--spacing-sm);
  }

  .topbar-breadcrumb {
    display: none;
  }

  .stat-card .stat-value {
    font-size: 1.25rem;
  }

  .stat-card .stat-icon {
    font-size: 1.5rem;
  }

  .page-header h1 {
    font-size: 1.15rem;
  }

  .main-content {
    padding: var(--spacing-sm);
  }

  .card-custom .card-body {
    padding: var(--spacing-sm);
  }

  .stat-card {
    padding: var(--spacing-sm);
  }

  .quick-actions {
    flex-direction: column;
  }

  .quick-action-btn {
    width: 100%;
    justify-content: center;
  }

  .calendar-day {
    min-height: 60px;
  }

  .calendar-event {
    font-size: 0.6rem;
  }
}

/* ============================================================================
   UTILITIES
   ============================================================================ */
.text-primary-custom {
  color: var(--primary-color) !important;
}

.bg-primary-custom {
  background-color: var(--primary-color) !important;
}

.text-truncate-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.cursor-pointer {
  cursor: pointer;
}

/* ============================================================================
   ANIMATIONS
   ============================================================================ */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.fade-in {
  animation: fadeIn 0.5s ease-in;
}

/* ============================================================================
   PRINT STYLES
   ============================================================================ */
@media print {
  .sidebar,
  .topbar,
  .footer,
  .btn,
  .no-print {
    display: none !important;
  }

  .main-wrapper {
    margin-left: 0;
    margin-top: 0;
  }

  .main-content {
    padding: 0;
  }
}