/**
 * ===============================================================================
 * STUDENTS MODULE - PREMIUM UX v2.0
 * Sistema de Design Academia Krav Maga
 * ===============================================================================
 * 
 * Implementa:
 * - Gradientes premium (#667eea + #764ba2)
 * - Animações suaves e micro-interações
 * - Cards elevados com sombras
 * - Responsividade completa (768px/1024px/1440px)
 * - Estados loading/empty/error
 * - Dark mode ready
 */

@import '../design-system/tokens.css';

/* ============================================================================
   ANIMATIONS & KEYFRAMES
   ========================================================================= */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.9;
        transform: scale(1.05);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ============================================================================
   CONTAINER & BASE STYLES
   ========================================================================= */

.students-premium {
    animation: fadeIn 0.3s ease-in-out;
}

.students-header-gradient {
    background: linear-gradient(135deg, 
        var(--color-surface) 0%, 
        rgba(102, 126, 234, 0.05) 50%,
        var(--color-surface) 100%);
    border: 2px solid transparent;
    background-clip: padding-box;
    position: relative;
    overflow: hidden;
}

.students-header-gradient::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent,
        rgba(102, 126, 234, 0.1),
        transparent
    );
    animation: shimmer 3s infinite;
}

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

.icon-bounce {
    display: inline-block;
    animation: bounce 2s ease-in-out infinite;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.breadcrumb-current {
    color: var(--primary-color);
    font-weight: var(--font-weight-semibold);
}

/* ============================================================================
   STATS CARDS - ANIMATED
   ========================================================================= */

.stats-animated {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin: var(--spacing-xl);
}

.stats-animated .stat-card-enhanced {
    animation: fadeInUp 0.5s ease-out backwards;
    transition: all var(--transition-bounce);
}

.stats-animated .stat-card-enhanced:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
}

.stat-gradient-primary {
    background: var(--gradient-primary);
    color: white;
}

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

.stat-gradient-info {
    background: linear-gradient(135deg, #3B82F6 0%, #60A5FA 100%);
    color: white;
}

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

.stat-icon-wrapper {
    position: relative;
}

.stat-icon {
    font-size: 3rem;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.stat-trend {
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-xs);
    opacity: 0.9;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* Counter animation */
.counter {
    font-variant-numeric: tabular-nums;
}

/* ============================================================================
   WELCOME CARD - NEW STUDENT
   ========================================================================= */

.welcome-card-new-student {
    background: linear-gradient(135deg, 
        rgba(102, 126, 234, 0.05) 0%, 
        rgba(118, 75, 162, 0.05) 100%);
    border: 2px solid var(--primary-color);
    border-radius: 20px;
    padding: 2.5rem;
    margin: 2rem 0;
    animation: fadeInUp 0.6s ease-out;
    position: relative;
    overflow: hidden;
}

.welcome-card-new-student::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

.welcome-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.welcome-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: bounce 2s ease-in-out infinite;
    display: inline-block;
}

.welcome-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 0.5rem 0;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin: 0 0 2rem 0;
    line-height: 1.6;
}

.welcome-tips {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
}

.tip-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--color-surface);
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.tip-item:hover {
    transform: translateX(8px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

.tip-item i {
    color: var(--primary-color);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.tip-item span {
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.5;
}

.required-mark {
    color: #EF4444;
    font-weight: 700;
}

/* ============================================================================
   STUDENT SUMMARY CARD - EDIT MODE
   ========================================================================= */

.student-summary-card {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
    animation: fadeInUp 0.5s ease-out;
}

.student-summary-card .stat-card-enhanced {
    background: var(--color-surface);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.student-summary-card .stat-card-enhanced:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.15);
}

.student-summary-card .stat-icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 12px;
    flex-shrink: 0;
}

.student-summary-card .stat-content {
    flex: 1;
}

.student-summary-card .stat-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 0.25rem 0;
}

.student-summary-card .stat-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

@media (max-width: 768px) {
    .welcome-card-new-student {
        padding: 1.5rem;
        margin: 1rem 0;
    }

    .welcome-icon {
        font-size: 3rem;
    }

    .welcome-title {
        font-size: 1.5rem;
    }

    .welcome-subtitle {
        font-size: 1rem;
    }

    .student-summary-card {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

/* ============================================================================
   FILTERS - ENHANCED
   ========================================================================= */

.filters-enhanced {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    animation: slideInLeft 0.4s ease-out;
}

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

.filters-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin: 0;
}

.filter-search {
    flex: 2;
    min-width: 300px;
}

.input-with-icon {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-icon .filter-input {
    padding-left: 2.5rem;
    padding-right: 2.5rem;
}

.input-icon {
    position: absolute;
    left: var(--spacing-md);
    color: var(--color-text-muted);
    pointer-events: none;
}

.input-clear {
    position: absolute;
    right: var(--spacing-md);
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
}

.input-clear:hover {
    background: var(--color-background);
    color: var(--color-error);
}

/* ============================================================================
   TABLE VIEW - PREMIUM
   ========================================================================= */

.view-container {
    margin: var(--spacing-xl);
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 2px solid var(--color-border);
}

.table-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin: 0;
}

.results-count {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-background);
    border-radius: var(--radius-md);
}

.students-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.students-table thead th {
    background: var(--color-background);
    font-weight: var(--font-weight-semibold);
    text-align: left;
    padding: var(--spacing-md);
    cursor: pointer;
    user-select: none;
    transition: var(--transition-normal);
    position: relative;
}

.students-table thead th:hover {
    background: var(--color-border);
}

.sort-icon {
    margin-left: var(--spacing-xs);
    opacity: 0.5;
    transition: var(--transition-normal);
}

.students-table thead th:hover .sort-icon {
    opacity: 1;
}

/* Row animations */
.row-animated {
    animation: fadeInUp 0.3s ease-out backwards;
}

.row-link {
    cursor: pointer;
    transition: all var(--transition-normal);
}

.row-link:hover {
    background: var(--color-background);
    transform: translateX(4px);
    box-shadow: -4px 0 0 var(--primary-color);
}

.row-link td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

/* ============================================================================
   STUDENT INFO CARDS
   ========================================================================= */

.student-info-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.student-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    overflow: hidden;
    border: 2px solid var(--primary-color);
    flex-shrink: 0;
}

.student-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.student-details {
    flex: 1;
}

.student-name {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.student-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.contact-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-normal);
}

.contact-link:hover {
    text-decoration: underline;
    color: var(--secondary-color);
}

/* ============================================================================
   BADGES & STATUS
   ========================================================================= */

.category-badge,
.belt-badge,
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    white-space: nowrap;
}

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

.belt-badge {
    background: var(--color-background);
    border: 2px solid currentColor;
    font-weight: var(--font-weight-semibold);
}

.belt-white { color: #6B7280; }
.belt-yellow { color: #F59E0B; }
.belt-orange { color: #F97316; }
.belt-green { color: #10B981; }
.belt-blue { color: #3B82F6; }
.belt-brown { color: #92400E; }
.belt-black { color: #1F2937; }

.belt-emoji {
    font-size: 1.2em;
}

.status-badge {
    font-weight: var(--font-weight-semibold);
}

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

.status-inactive {
    background: var(--color-text-muted);
    color: white;
}

.pulse-animation {
    animation: pulse 2s ease-in-out infinite;
}

/* ============================================================================
   STATS MINI CARDS
   ========================================================================= */

.stats-mini-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.stat-value {
    font-weight: var(--font-weight-semibold);
}

.stat-label {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
}

/* Progress bars */
.progress-bar-mini {
    width: 100%;
    height: 6px;
    background: var(--color-border);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.progress-success {
    background: var(--gradient-success);
}

.progress-warning {
    background: var(--gradient-warning);
}

.progress-danger {
    background: var(--gradient-error);
}

.progress-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
    display: block;
}

/* ============================================================================
   ACTION BUTTONS
   ========================================================================= */

.action-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

.btn-action {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-bounce);
    background: var(--color-background);
    color: var(--color-text);
}

.btn-action:hover {
    transform: translateY(-2px) scale(1.1);
    box-shadow: var(--shadow-md);
}

.btn-edit:hover {
    background: var(--primary-color);
    color: white;
}

.btn-view:hover {
    background: var(--color-info);
    color: white;
}

.btn-whatsapp:hover {
    background: #25D366;
    color: white;
}

.btn-personal:hover {
    background: var(--secondary-color);
    color: white;
}

.btn-action:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ============================================================================
   PAGINATION - ENHANCED
   ========================================================================= */

.pagination-enhanced {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl);
    background: var(--color-background);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.pagination-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

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

.page-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-semibold);
}

.page-input {
    width: 60px;
    text-align: center;
    padding: var(--spacing-xs);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
}

.quick-jump-select {
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    background: var(--color-surface);
}

/* ============================================================================
   CARDS VIEW (GRID ALTERNATIVE)
   ========================================================================= */

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
}

.student-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-bounce);
    cursor: pointer;
    animation: fadeInUp 0.4s ease-out backwards;
}

.student-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

/* ============================================================================
   EMPTY & ERROR STATES
   ========================================================================= */

.module-isolated-empty-state {
    text-align: center;
    padding: var(--spacing-3xl);
    color: var(--color-text-muted);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.empty-message {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xl);
}

.empty-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.error-message {
    color: var(--color-error);
    padding: var(--spacing-lg);
    text-align: center;
}

/* ============================================================================
   LOADING STATES
   ========================================================================= */

.loading-state-row td {
    padding: var(--spacing-3xl) !important;
}

.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-3xl);
}

.loading-spinner {
    font-size: 2rem;
    color: var(--primary-color);
    animation: pulse 1.5s ease-in-out infinite;
}

.loading-text {
    color: var(--color-text-muted);
}

/* ============================================================================
   RESPONSIVE DESIGN
   ========================================================================= */

/* Tablets (1024px) */
@media (max-width: 1024px) {
    .stats-animated {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .filter-row {
        flex-wrap: wrap;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .pagination-enhanced {
        flex-direction: column;
        text-align: center;
    }
}

/* Mobile (768px) */
@media (max-width: 768px) {
    .stats-animated {
        grid-template-columns: 1fr;
    }
    
    .module-header-premium .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .header-actions {
        width: 100%;
        flex-direction: column;
    }
    
    .header-actions button {
        width: 100%;
    }
    
    .filter-row {
        flex-direction: column;
    }
    
    .filter-group {
        width: 100%;
    }
    
    .table-container {
        overflow-x: auto;
    }
    
    .students-table {
        min-width: 900px;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================================
   PRINT STYLES
   ========================================================================= */

@media print {
    .header-actions,
    .action-buttons,
    .pagination-enhanced,
    .filters-enhanced {
        display: none !important;
    }
    
    .students-table {
        page-break-inside: avoid;
    }
}

/* ============================================================================
   STUDENT CARDS VIEW - PREMIUM
   ========================================================================= */

.student-card {
  background: var(--color-surface);
  border-radius: 16px;
  padding: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  border: 2px solid transparent;
  overflow: hidden;
  animation: fadeInUp 0.5s ease-out backwards;
  cursor: pointer;
}

.student-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 16px 32px rgba(102, 126, 234, 0.25);
  border-color: var(--primary-color);
}

.card-header-premium {
  position: relative;
  padding: 2rem 1.5rem 1rem;
  background: var(--gradient-primary);
  text-align: center;
}

.student-avatar.large {
  width: 120px;
  height: 120px;
  margin: 0 auto;
  border-radius: var(--radius-full);
  border: 4px solid white;
  overflow: hidden;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.student-avatar.large img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.student-status-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
}

.card-body-premium {
  padding: 1.5rem;
}

.student-name-large {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
  margin: 0 0 1rem 0;
}

.student-meta-cards {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--color-background);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.contact-info-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--color-background);
  border-radius: 12px;
}

.contact-info-card .contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.contact-info-card .contact-item i {
  color: var(--primary-color);
  width: 20px;
  text-align: center;
}

.stats-mini-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
  background: var(--color-background);
  border-radius: 12px;
  margin-bottom: 1rem;
}

.stats-mini-card .stat-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.stats-mini-card .stat-item i {
  font-size: 1.2rem;
  color: var(--primary-color);
  width: 24px;
  text-align: center;
}

.stats-mini-card .stat-item > div {
  flex: 1;
}

.stats-mini-card .stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.card-observations {
  padding: 1rem;
  background: var(--color-background);
  border-radius: 12px;
  border-left: 4px solid var(--primary-color);
  margin-bottom: 1rem;
}

.card-observations i {
  color: var(--primary-color);
  margin-right: 0.5rem;
}

.card-observations p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.card-actions-premium {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 1.5rem;
  background: var(--color-background);
  border-top: 1px solid var(--color-border);
}

.card-actions-premium .btn-action {
  flex: 1;
  max-width: 50px;
}

/* Toggle View Button Enhancement */
#toggle-view-btn {
  position: relative;
  overflow: hidden;
}

#toggle-view-btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.3s, height 0.3s;
}

#toggle-view-btn:hover::after {
  width: 120%;
  height: 120%;
}

/* Cards Grid Responsive */
@media (max-width: 1440px) {
  .cards-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

@media (max-width: 1024px) {
  .cards-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  }
  
  .student-avatar.large {
    width: 100px;
    height: 100px;
  }
  
  .student-name-large {
    font-size: 1.2rem;
  }
}

@media (max-width: 768px) {
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .student-card {
    max-width: 100%;
  }
  
  .card-header-premium {
    padding: 1.5rem 1rem 0.75rem;
  }
  
  .student-avatar.large {
    width: 80px;
    height: 80px;
  }
}

/* Animation Enhancement for Cards */
@keyframes cardPulse {
  0%, 100% {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  }
  50% {
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.15);
  }
}

.student-card:active {
  animation: cardPulse 0.3s ease-in-out;
}

/* ============================================================================
   TAB SYSTEM - STUDENTS EDITOR
   ========================================================================= */

/* Tab Navigation */
.tabs-header {
  display: flex;
  gap: 0.5rem;
  padding: 1rem;
  background: var(--color-background);
  border-bottom: 2px solid var(--color-border);
  overflow-x: auto;
  scrollbar-width: thin;
}

.tab-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: transparent;
  border: none;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.tab-button::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: translateX(-50%);
  transition: width 0.3s ease;
}

.tab-button:hover {
  background: rgba(102, 126, 234, 0.1);
  color: var(--primary-color);
  transform: translateY(-2px);
}

.tab-button:hover::before {
  width: 60%;
}

.tab-button.active {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
  transform: translateY(-2px);
}

.tab-button.active::before {
  width: 100%;
  background: rgba(255, 255, 255, 0.5);
}

.tab-button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  background: var(--color-background);
  color: var(--color-text-muted);
}

.tab-button:disabled:hover {
  transform: none;
  background: var(--color-background);
}

.tab-button:disabled::before {
  display: none;
}

.tab-button i {
  font-size: 1.1rem;
}

/* Tab Panels */
.tab-panels {
  position: relative;
  min-height: 400px;
}

.tab-panel {
  display: none;
  animation: fadeInUp 0.4s ease-out;
  padding: 2rem;
}

.tab-panel.active {
  display: block;
}

/* Tab Content Styling */
.section-body {
  padding: 1.5rem;
}

.overview-grid,
.attendance-container,
.techniques-container,
.progress-container {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 1024px) {
  .overview-grid,
  .attendance-container,
  .techniques-container,
  .progress-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

.overview-card,
.attendance-stats,
.attendance-history,
.techniques-stats,
.techniques-list,
.course-progress,
.missing-content {
  background: var(--color-surface);
  padding: 1.5rem;
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
}

.overview-card:hover,
.attendance-stats:hover,
.techniques-stats:hover,
.course-progress:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.15);
}

.overview-card h4,
.attendance-stats h4,
.techniques-stats h4,
.course-progress h4 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 1.5rem 0;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
}

.overview-card h4 i,
.attendance-stats h4 i,
.techniques-stats h4 i,
.course-progress h4 i {
  color: var(--primary-color);
}

/* Loading States */
.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  color: var(--primary-color);
  font-size: 1.2rem;
}

.loading-spinner i {
  margin-right: 0.5rem;
}

/* Placeholder */
.placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

.placeholder i {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

/* Tab Content Responsive */
@media (max-width: 768px) {
  .tabs-header {
    padding: 0.75rem;
    gap: 0.25rem;
  }

  .tab-button {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
  }

  .tab-button i {
    font-size: 0.9rem;
  }

  .tab-panel {
    padding: 1rem;
  }

  .section-body {
    padding: 1rem;
  }

  .overview-grid,
  .attendance-container,
  .techniques-container,
  .progress-container {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

/* ============================================================================
   ENROLLMENT TAB - PACKAGE SELECTION
   ========================================================================= */

.enrollment-header {
  text-align: center;
  padding: 2rem 1rem;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
  border-radius: 16px;
  margin-bottom: 2rem;
}

.enrollment-icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  animation: bounce 2s ease-in-out infinite;
  display: inline-block;
}

.enrollment-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 0.5rem 0;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.enrollment-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* Packages Grid for Enrollment */
.packages-grid-enrollment {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.package-card-enrollment {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 16px;
  padding: 2rem;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  cursor: pointer;
  animation: fadeInUp 0.5s ease-out backwards;
}

.package-card-enrollment:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 32px rgba(102, 126, 234, 0.2);
  border-color: var(--primary-color);
}

.package-card-enrollment.selected {
  border-color: var(--primary-color);
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.25);
}

.package-badge {
  position: absolute;
  top: -10px;
  right: 20px;
  background: var(--gradient-warning);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.package-header-enrollment {
  text-align: center;
  margin-bottom: 1.5rem;
}

.package-header-enrollment h4 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 1rem 0;
}

.package-price-enrollment {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.25rem;
}

.price-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.price-period {
  font-size: 1rem;
  color: var(--color-text-muted);
}

.package-description-enrollment {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.6;
  font-size: 0.95rem;
}

.package-features-enrollment {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem 0;
}

.package-features-enrollment li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
}

.package-features-enrollment li:last-child {
  border-bottom: none;
}

.package-features-enrollment i {
  color: var(--primary-color);
  font-size: 1.1rem;
}

.btn-select-package {
  width: 100%;
  padding: 1rem;
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-select-package:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.package-card-enrollment.selected .btn-select-package {
  background: var(--gradient-success);
}

/* =========================================================================
   ENROLLMENT TAB - COURSE SELECTION
   ========================================================================= */

.courses-grid-enrollment {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.course-card-enrollment {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 16px;
  padding: 1.5rem;
  transition: all 0.3s ease;
  position: relative;
  cursor: pointer;
}

.course-card-enrollment:hover {
  border-color: var(--primary-color);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.2);
  transform: translateY(-4px);
}

.course-card-enrollment.selected {
  border-color: var(--primary-color);
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.course-header-enrollment {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.course-icon {
  font-size: 2rem;
  filter: grayscale(0.3);
}

.course-header-enrollment h4 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--color-text-primary);
  flex: 1;
}

.course-level-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--gradient-primary);
  color: white;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 0.25rem;
}

.course-description-enrollment {
  color: var(--color-text-secondary);
  margin: 1rem 0 1.5rem 0;
  line-height: 1.6;
  font-size: 0.95rem;
}

.course-info-enrollment {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--color-background);
  border-radius: 12px;
}

.course-info-enrollment .info-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.course-info-enrollment .info-item i {
  color: var(--primary-color);
  width: 20px;
  text-align: center;
}

.course-checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  padding: 1rem;
  background: var(--color-background);
  border-radius: 12px;
  transition: all 0.3s ease;
  user-select: none;
}

.course-checkbox-label:hover {
  background: rgba(102, 126, 234, 0.1);
}

.course-checkbox {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.checkbox-custom {
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-border);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.course-checkbox:checked + .checkbox-custom {
  background: var(--gradient-primary);
  border-color: var(--primary-color);
}

.course-checkbox:checked + .checkbox-custom::after {
  content: '✓';
  color: white;
  font-size: 14px;
  font-weight: bold;
}

.checkbox-text {
  font-weight: 600;
  color: var(--color-text-primary);
  font-size: 0.95rem;
}

/* Selected Courses Display */
#selected-courses-display {
  display: none;
  background: var(--color-surface);
  border: 2px solid var(--primary-color);
  border-radius: 16px;
  padding: 1.5rem;
  margin-top: 2rem;
  animation: fadeInUp 0.4s ease;
}

#selected-courses-display h4 {
  margin: 0 0 1rem 0;
  color: var(--primary-color);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

#selected-courses-display h4 i {
  font-size: 1.25rem;
}

#selected-courses-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.selected-course-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  background: var(--color-background);
  border-radius: 12px;
  transition: all 0.3s ease;
}

.selected-course-item:hover {
  background: rgba(102, 126, 234, 0.1);
}

.selected-course-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
}

.selected-course-info i {
  color: var(--primary-color);
  font-size: 1.25rem;
}

.selected-course-text {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.selected-course-text strong {
  color: var(--color-text-primary);
  font-size: 1rem;
}

.course-level-small {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.btn-remove-course {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  font-size: 1.1rem;
}

.btn-remove-course:hover {
  background: rgba(255, 59, 48, 0.1);
  color: #ff3b30;
}

/* Empty & Error States */
.empty-state,
.error-state {
  text-align: center;
  padding: 3rem;
  color: var(--color-text-secondary);
  font-size: 1rem;
}

.error-state {
  color: #ff3b30;
}

/* Responsive Design for Course Cards */
@media (max-width: 1024px) {
  .courses-grid-enrollment {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
  }
}

@media (max-width: 768px) {
  .courses-grid-enrollment {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .course-card-enrollment {
    padding: 1.25rem;
  }
  
  .course-header-enrollment h4 {
    font-size: 1.1rem;
  }
  
  #selected-courses-display {
    padding: 1.25rem;
  }
}

/* Selected Package Display */
.selected-package-card {
  background: var(--color-surface);
  border: 2px solid var(--primary-color);
  border-radius: 16px;
  padding: 2rem;
  margin: 1rem 0;
}

.selected-package-display {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.selected-icon {
  font-size: 3rem;
  animation: pulse 2s ease-in-out infinite;
}

.selected-info h4 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 0.5rem 0;
}

.selected-price {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary-color);
  margin: 0;
}

/* Enrollment Summary */
.enrollment-summary {
  margin-top: 2rem;
  padding: 2rem;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
  border-radius: 16px;
  border: 2px solid var(--primary-color);
}

/* Enrollment Navigation Buttons */
.enrollment-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--color-surface);
  border-radius: 12px;
  border-top: 2px solid var(--color-border);
}

.enrollment-navigation .btn-secondary,
.enrollment-navigation .btn-primary {
  min-width: 200px;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: all 0.3s ease;
}

.enrollment-navigation .btn-primary i {
  order: 2;
}

.enrollment-navigation .btn-secondary i {
  order: 0;
}

.summary-card {
  background: var(--color-surface);
  padding: 2rem;
  border-radius: 12px;
}

.summary-card h4 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 1.5rem 0;
}

.summary-card h4 i {
  color: var(--primary-color);
}

.summary-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 1rem;
}

.summary-item:last-child {
  border-bottom: none;
}

.summary-item span {
  color: var(--color-text-muted);
}

.summary-item strong {
  color: var(--color-text);
  font-weight: 600;
}

.summary-total {
  margin-top: 1rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--primary-color);
  font-size: 1.2rem;
}

.summary-total strong {
  color: var(--primary-color);
  font-size: 1.5rem;
  font-weight: 700;
}

/* Responsive */
@media (max-width: 1024px) {
  .packages-grid-enrollment {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  }
}

@media (max-width: 768px) {
  .packages-grid-enrollment {
    grid-template-columns: 1fr;
  }

  .enrollment-header {
    padding: 1.5rem 1rem;
  }

  .enrollment-icon {
    font-size: 2.5rem;
  }

  .enrollment-title {
    font-size: 1.5rem;
  }

  .package-card-enrollment {
    padding: 1.5rem;
  }

  .price-value {
    font-size: 2rem;
  }

  .selected-package-display {
    flex-direction: column;
    text-align: center;
  }
}

/* ============================================
   Courses Tab Styles
   ============================================ */

.courses-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.course-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.3s ease;
}

.course-item:hover {
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
  transform: translateY(-2px);
}

.course-item.base-course {
  border: 2px solid var(--primary-color);
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
}

.course-item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.course-item-title {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.course-item-title h5 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

.badge-base-course {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.course-level-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.9rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.course-level-badge.level-beginner {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
}

.course-level-badge.level-intermediate {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: white;
}

.course-level-badge.level-advanced {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: white;
}

.course-item-details {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.detail-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.detail-item i {
  color: var(--primary-color);
}

.available-courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.available-course-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.available-course-card:hover {
  border-color: var(--primary-color);
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.2);
  transform: translateY(-4px);
}

.course-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.course-card-header h5 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
  flex: 1;
}

.course-card-body {
  flex: 1;
  margin-bottom: 1rem;
}

.course-description {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 1rem;
}

.course-card-meta {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.meta-item i {
  color: var(--primary-color);
  width: 16px;
}

.course-card-footer {
  margin-top: auto;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
}

.btn-icon.btn-danger {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: white;
}

.btn-icon.btn-danger:hover {
  background: linear-gradient(135deg, #dc2626, #b91c1c);
  transform: scale(1.05);
}

.empty-state {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--color-text-muted);
}

.empty-state i {
  margin-bottom: 1rem;
}

.empty-state p {
  font-size: 1rem;
  margin: 0;
}

.error-state {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 8px;
  padding: 1rem;
  color: #dc2626;
  text-align: center;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .available-courses-grid {
    grid-template-columns: 1fr;
  }
  
  .course-item-header {
    flex-direction: column;
  }
  
  .course-item-details {
    flex-direction: column;
  }
}

/* ============================================
   Courses Management Container
   ============================================ */

.courses-management-container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.current-courses,
.available-courses {
  padding: 1.5rem;
}

.current-courses h4,
.available-courses h4 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 1.5rem 0;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-border);
}

.current-courses h4 i,
.available-courses h4 i {
  color: var(--primary-color);
  font-size: 1.3rem;
}

.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 1rem;
  font-size: 1.1rem;
  color: var(--color-text-muted);
}

.loading-spinner i {
  margin-right: 0.75rem;
  font-size: 1.5rem;
  color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
  .courses-management-container {
    gap: 1.5rem;
  }
  
  .current-courses,
  .available-courses {
    padding: 1rem;
  }
}