/* ArchitectUI Dashboard HTML PRO Styles */

/* =====================================================
   ArchitectUI Variables & Color Scheme
   ===================================================== */
:root {
    /* ArchitectUI Primary Colors */
    --primary: #3f6ad8;
    --primary-dark: #2c5aa0;
    --primary-light: #e8f0fe;
    --secondary: #495057;
    --accent: #fd7e14;
    
    /* Background Colors */
    --body-bg: #f8f9fa;
    --sidebar-bg: #ffffff;
    --header-bg: #ffffff;
    --card-bg: #ffffff;
    --content-bg: #f8f9fa;
    
    /* Border Colors */
    --border-color: #dee2e6;
    --border-light: #e9ecef;
    --border-dark: #adb5bd;
    
    /* Text Colors */
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --text-white: #ffffff;
    --text-dark: #343a40;
    
    /* State Colors */
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #17a2b8;
    --light: #f8f9fa;
    --dark: #343a40;
    
    /* Spacing (Bootstrap-like) */
    --spacer: 1rem;
    --spacer-1: calc(var(--spacer) * 0.25);
    --spacer-2: calc(var(--spacer) * 0.5);
    --spacer-3: var(--spacer);
    --spacer-4: calc(var(--spacer) * 1.5);
    --spacer-5: calc(var(--spacer) * 3);
    
    /* Border Radius */
    --border-radius: 0.375rem;
    --border-radius-sm: 0.25rem;
    --border-radius-lg: 0.5rem;
    --border-radius-xl: 1rem;
    --border-radius-pill: 50rem;
    
    /* Shadows */
    --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --box-shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --box-shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
    --box-shadow-inset: inset 0 1px 2px rgba(0, 0, 0, 0.075);
    
    /* Layout */
    --sidebar-width: 280px;
    --header-height: 70px;
    --footer-height: 60px;
    
    /* Transitions */
    --transition: all 0.15s ease-in-out;
    --transition-fast: all 0.1s ease-in-out;
    --transition-slow: all 0.3s ease-in-out;
}

/* =====================================================
   Base Styles
   ===================================================== */
* {
    box-sizing: border-box;
}

*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-family: sans-serif;
    line-height: 1.15;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-primary);
    text-align: left;
    background-color: var(--body-bg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-dark);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-top: 0;
    margin-bottom: 1rem;
}

a {
    color: var(--primary);
    text-decoration: none;
    background-color: transparent;
}

a:hover {
    color: var(--primary-dark);
    text-decoration: none;
}

/* =====================================================
   Layout Structure
   ===================================================== */
.app-container {
    display: flex;
    min-height: 100vh;
    background-color: var(--body-bg);
}

/* Sidebar */
.app-sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 1000;
    transition: var(--transition);
}

.app-sidebar.collapsed {
    width: 80px;
    overflow-x: hidden;
}

.app-sidebar.collapsed .sidebar-brand span,
.app-sidebar.collapsed .nav-link span,
.app-sidebar.collapsed .nav-group-title {
    display: none;
}

.app-sidebar.collapsed .nav-link {
    justify-content: center;
    padding: var(--spacer-3) var(--spacer-2);
}

.app-sidebar.collapsed .nav-link i {
    margin-right: 0;
    font-size: 1.2rem;
}

.app-sidebar.collapsed .sidebar-header {
    padding: var(--spacer-3);
    text-align: center;
}

.app-sidebar.collapsed .sidebar-brand {
    justify-content: center;
}

.app-sidebar.collapsed .sidebar-brand i {
    margin-right: 0;
    font-size: 1.5rem;
}

/* Tooltips para sidebar colapsado */
.app-sidebar.collapsed .nav-link {
    position: relative;
}

.app-sidebar.collapsed .nav-link:hover::after {
    content: attr(data-tooltip);
    position: fixed;
    left: 90px;
    top: var(--mouse-y, 50%);
    transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.9);
    color: white;
    padding: var(--spacer-1) var(--spacer-2);
    border-radius: var(--border-radius);
    font-size: 0.75rem;
    white-space: nowrap;
    z-index: 10000;
    pointer-events: none;
    animation: tooltipFadeIn 0.2s ease;
}

@keyframes tooltipFadeIn {
    from {
        opacity: 0;
        transform: translateY(-50%) translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(-50%) translateX(0);
    }
}

.sidebar-header {
    padding: var(--spacer-4);
    border-bottom: 1px solid var(--border-light);
    background-color: var(--sidebar-bg);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    text-decoration: none;
}

.sidebar-brand i {
    margin-right: var(--spacer-2);
    color: var(--primary);
}

/* Navigation */
.sidebar-nav {
    padding: var(--spacer-3) 0;
}

.nav-group {
    margin-bottom: var(--spacer-3);
}

.nav-group-title {
    padding: var(--spacer-2) var(--spacer-4);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--spacer-1);
}

.nav-item {
    margin-bottom: var(--spacer-1);
}

.nav-link {
    display: flex;
    align-items: center;
    padding: var(--spacer-2) var(--spacer-4);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 0;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    background-color: var(--light);
    color: var(--text-dark);
}

.nav-link.active {
    background-color: var(--primary-light);
    color: var(--primary);
    font-weight: 500;
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background-color: var(--primary);
}

.nav-link i {
    margin-right: var(--spacer-3);
    width: 20px;
    text-align: center;
    font-size: 1rem;
}

.nav-link span {
    flex: 1;
}

/* Main Content */
.app-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left var(--transition);
    overflow-x: hidden;
}

.app-main.expanded {
    margin-left: 80px;
}

/* Smooth transitions for sidebar content */
.app-sidebar .nav-link span,
.app-sidebar .sidebar-brand span,
.app-sidebar .nav-group-title {
    transition: opacity var(--transition), visibility var(--transition), width var(--transition);
}

.app-sidebar .nav-link i {
    transition: margin-right var(--transition), font-size var(--transition);
}

.app-sidebar .sidebar-brand i {
    transition: margin-right var(--transition), font-size var(--transition);
}

/* Prevenir scrollbars horizontales en toda la aplicación */
* {
    box-sizing: border-box;
}

body, html {
    overflow-x: hidden;
}

.app-container {
    overflow-x: hidden;
}

/* Header */
.app-header {
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0 var(--spacer-4);
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 999;
}

.header-left {
    display: flex;
    align-items: center;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    padding: var(--spacer-2);
    margin-right: var(--spacer-3);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.sidebar-toggle:hover {
    background-color: var(--light);
    color: var(--text-dark);
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-dark);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacer-3);
}

.header-info {
    text-align: right;
    font-size: 0.875rem;
}

.current-date {
    font-weight: 500;
    color: var(--text-dark);
}

.current-time {
    color: var(--text-secondary);
}

/* User Menu */
.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacer-2);
    padding-left: var(--spacer-3);
    border-left: 1px solid var(--border-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacer-2);
    font-size: 0.875rem;
    color: var(--text-dark);
    font-weight: 500;
}

.user-info i {
    font-size: 1.5rem;
    color: var(--primary);
}

.logout-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--light);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

.logout-btn:hover {
    background: var(--danger-light);
    border-color: var(--danger);
    color: var(--danger);
    transform: translateY(-1px);
}

.logout-btn:active {
    transform: translateY(0);
}

/* Content Area */
.app-content {
    flex: 1;
    padding: var(--spacer-4);
}

/* =====================================================
   Components
   ===================================================== */

/* Cards */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow-sm);
    margin-bottom: var(--spacer-4);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--box-shadow);
    border-color: var(--border-dark);
}

.card-header {
    padding: var(--spacer-3) var(--spacer-4);
    background-color: var(--light);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-dark);
    display: flex;
    align-items: center;
}

.card-title i {
    margin-right: var(--spacer-2);
    color: var(--primary);
}

.card-body {
    padding: var(--spacer-4);
}

.card-footer {
    padding: var(--spacer-3) var(--spacer-4);
    background-color: var(--light);
    border-top: 1px solid var(--border-color);
}

/* Buttons */
.btn {
    display: inline-block;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-dark);
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    background-color: transparent;
    border: 1px solid transparent;
    padding: var(--spacer-2) var(--spacer-3);
    font-size: 0.875rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

.btn:focus {
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(var(--primary), 0.25);
}

.btn-primary {
    color: var(--text-white);
    background-color: var(--primary);
    border-color: var(--primary);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-secondary {
    color: var(--text-white);
    background-color: var(--secondary);
    border-color: var(--secondary);
}

.btn-success {
    color: var(--text-white);
    background-color: var(--success);
    border-color: var(--success);
}

.btn-danger {
    color: var(--text-white);
    background-color: var(--danger);
    border-color: var(--danger);
}

.btn-warning {
    color: var(--text-dark);
    background-color: var(--warning);
    border-color: var(--warning);
}

.btn-info {
    color: var(--text-white);
    background-color: var(--info);
    border-color: var(--info);
}

.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline-primary:hover {
    color: var(--text-white);
    background-color: var(--primary);
    border-color: var(--primary);
}

.btn-sm {
    padding: var(--spacer-1) var(--spacer-2);
    font-size: 0.75rem;
    border-radius: var(--border-radius-sm);
}

.btn-lg {
    padding: var(--spacer-3) var(--spacer-4);
    font-size: 1rem;
    border-radius: var(--border-radius-lg);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacer-3);
}

.form-label {
    display: inline-block;
    margin-bottom: var(--spacer-1);
    font-weight: 500;
    color: var(--text-dark);
}

.form-control {
    display: block;
    width: 100%;
    padding: var(--spacer-2) var(--spacer-3);
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--card-bg);
    background-clip: padding-box;
    border: 1px solid var(--border-color);
    appearance: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.form-control:focus {
    color: var(--text-primary);
    background-color: var(--card-bg);
    border-color: var(--primary);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(var(--primary), 0.25);
}

.form-select {
    display: block;
    width: 100%;
    padding: var(--spacer-2) var(--spacer-3);
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

/* Grid System */
.row {
    display: flex;
    flex-wrap: wrap;
    margin-right: calc(-0.5 * var(--spacer-3));
    margin-left: calc(-0.5 * var(--spacer-3));
}

.col {
    flex-basis: 0;
    flex-grow: 1;
    padding-right: var(--spacer-3);
    padding-left: var(--spacer-3);
}

.col-1 { flex: 0 0 auto; width: 8.33333333%; }
.col-2 { flex: 0 0 auto; width: 16.66666667%; }
.col-3 { flex: 0 0 auto; width: 25%; }
.col-4 { flex: 0 0 auto; width: 33.33333333%; }
.col-5 { flex: 0 0 auto; width: 41.66666667%; }
.col-6 { flex: 0 0 auto; width: 50%; }
.col-7 { flex: 0 0 auto; width: 58.33333333%; }
.col-8 { flex: 0 0 auto; width: 66.66666667%; }
.col-9 { flex: 0 0 auto; width: 75%; }
.col-10 { flex: 0 0 auto; width: 83.33333333%; }
.col-11 { flex: 0 0 auto; width: 91.66666667%; }
.col-12 { flex: 0 0 auto; width: 100%; }

/* Stats Cards */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacer-4);
    margin-bottom: var(--spacer-4);
}

.stat-card {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--border-radius-lg);
    padding: var(--spacer-4);
    color: var(--text-white);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: var(--spacer-2);
    opacity: 0.9;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacer-1);
    line-height: 1;
}

.stat-label {
    opacity: 0.9;
    font-size: 0.875rem;
}

.stat-card.success {
    background: linear-gradient(135deg, var(--success), #1e7e34);
}

.stat-card.warning {
    background: linear-gradient(135deg, var(--warning), #d39e00);
    color: var(--text-dark);
}

.stat-card.info {
    background: linear-gradient(135deg, var(--info), #117a8b);
}

.stat-card.danger {
    background: linear-gradient(135deg, var(--danger), #bd2130);
}

/* Dashboard: números y texto inferiores siempre en blanco */
#dashboard-stats .stat-card .stat-number,
#dashboard-stats .stat-card .stat-label {
    color: #ffffff !important;
}

/* Data Tables */
.table-responsive {
    overflow-x: auto;
    border-radius: var(--border-radius-lg);
}

.table {
    width: 100%;
    margin-bottom: var(--spacer-3);
    color: var(--text-primary);
    border-collapse: collapse;
    font-size: 0.875rem;
}

.table th,
.table td {
    padding: var(--spacer-3);
    vertical-align: middle;
    border-top: 1px solid var(--border-color);
    text-align: left;
}

.table thead th {
    background-color: var(--light);
    border-bottom: 2px solid var(--border-color);
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-top: none;
    position: sticky;
    top: 0;
    z-index: 10;
}

.table tbody tr {
    transition: var(--transition);
}

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

.table tbody tr:first-child td {
    border-top: none;
}

/* Button Groups */
.btn-group {
    display: inline-flex;
    vertical-align: middle;
}

.btn-group .btn {
    position: relative;
    flex: 1 1 auto;
    margin: 0;
}

.btn-group .btn:not(:last-child) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    border-right: none;
}

.btn-group .btn:not(:first-child) {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.btn-group .btn:hover,
.btn-group .btn:focus,
.btn-group .btn:active {
    z-index: 1;
}

.btn-group-sm .btn {
    padding: var(--spacer-1) var(--spacer-2);
    font-size: 0.75rem;
    border-radius: var(--border-radius-sm);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1;
    color: var(--text-white);
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: var(--border-radius);
}

.badge.bg-light {
    color: var(--text-dark) !important;
}

.badge.bg-warning {
    color: var(--text-dark) !important;
}

/* Flex utilities */
.d-flex { display: flex !important; }
.align-items-center { align-items: center !important; }
.justify-content-center { justify-content: center !important; }
.flex-grow-1 { flex-grow: 1 !important; }

.me-1 { margin-right: 0.25rem !important; }
.me-2 { margin-right: 0.5rem !important; }
.me-3 { margin-right: 1rem !important; }
.ms-1 { margin-left: 0.25rem !important; }
.ms-2 { margin-left: 0.5rem !important; }
.ms-3 { margin-left: 1rem !important; }

.fw-bold { font-weight: 600 !important; }
.small { font-size: 0.875rem !important; }

/* Progress bars */
.progress {
    display: flex;
    height: 0.5rem;
    overflow: hidden;
    background-color: var(--light);
    border-radius: var(--border-radius);
}

.progress-bar {
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    color: var(--text-white);
    text-align: center;
    white-space: nowrap;
    background-color: var(--primary);
    transition: width 0.6s ease;
}

/* Avatar circles */
.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    border-radius: 50%;
    user-select: none;
}

.avatar-sm {
    width: 2rem;
    height: 2rem;
    font-size: 0.75rem;
}

.avatar-lg {
    width: 3rem;
    height: 3rem;
    font-size: 1.25rem;
}

/* Empty states */
.empty-state {
    text-align: center;
    padding: var(--spacer-5);
}

.empty-state i {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: var(--spacer-3);
}

.empty-state h4 {
    color: var(--text-secondary);
    margin-bottom: var(--spacer-2);
}

.empty-state p {
    color: var(--text-muted);
    max-width: 400px;
    margin: 0 auto;
}

/* Search and Filters */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacer-4);
    flex-wrap: wrap;
    gap: var(--spacer-3);
}

.page-actions {
    display: flex;
    gap: var(--spacer-2);
    align-items: center;
}

.search-filters {
    display: flex;
    gap: var(--spacer-3);
    margin-bottom: var(--spacer-4);
    flex-wrap: wrap;
}

.search-input {
    min-width: 250px;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1100 !important;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-dialog {
    position: relative;
    width: auto;
    margin: var(--spacer-3);
    max-width: 500px;
    z-index: 1101;
    pointer-events: auto;
}

/* Modal personalizado ultraligero - SIN animaciones */
.modal {
    display: none;
    position: fixed;
    z-index: 1100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex !important;
}

.modal-dialog {
    position: relative;
    width: auto;
    margin: 1rem;
    max-width: 500px;
    pointer-events: auto;
    /* SIN transform ni transitions */
}

.modal-content {
    position: relative;
    background-color: #fff;
    border: none;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    z-index: 1102;
    /* SIN transform ni transitions */
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border-bottom: 1px solid #dee2e6;
    border-radius: 10px 10px 0 0;
}

.modal-body {
    padding: 1rem;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 1rem;
    border-top: 1px solid #dee2e6;
    border-radius: 0 0 10px 10px;
    gap: 0.5rem;
}

.btn-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0.5;
}

.btn-close:hover {
    opacity: 0.75;
}

body.modal-open {
    overflow: hidden;
}

/* Eliminar cualquier animación residual de Bootstrap */
.modal * {
    transition: none !important;
    transform: none !important;
    animation: none !important;
}

/* Campos de formulario personalizados */
#custom-category-container {
    transition: all 0.3s ease;
    margin-top: 1rem;
}

#custom-category-container input {
    border-left: 3px solid var(--primary-color);
}

/* Botones de acción en cursos */
.curso-actions {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 10;
}

.curso-actions .dropdown-toggle {
    border: none;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(5px);
    width: 30px;
    height: 30px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.curso-actions .dropdown-toggle:hover {
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.curso-card {
    position: relative;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.curso-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* Modal de confirmación personalizado */
#confirmDeleteModal .modal-content {
    border-radius: 15px;
    border: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

#confirmDeleteModal .modal-header {
    background: linear-gradient(135deg, #fee2e2 0%, #fef2f2 100%);
    border-radius: 15px 15px 0 0;
}

#confirmDeleteModal .delete-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    animation: pulse 2s infinite;
}

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

#confirmDeleteModal .course-name-to-delete {
    font-size: 1.1em;
    color: #dc3545;
    padding: 8px 12px;
    background: #fff5f5;
    border-radius: 8px;
    border-left: 4px solid #dc3545;
}

.modal-content {
    position: relative;
    display: flex;
    flex-direction: column;
    width: 100%;
    color: var(--text-primary);
    background-color: var(--card-bg);
    background-clip: padding-box;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow-lg);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacer-4);
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    margin-bottom: 0;
    line-height: 1.5;
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacer-1);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-dark);
    background-color: var(--light);
}

.modal-body {
    position: relative;
    flex: 1 1 auto;
    padding: var(--spacer-4);
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: var(--spacer-3) var(--spacer-4);
    border-top: 1px solid var(--border-color);
    gap: var(--spacer-2);
}

/* Loading */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.loading-overlay.show {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Alerts & Toasts */
.alert {
    position: relative;
    padding: var(--spacer-3) var(--spacer-4);
    margin-bottom: var(--spacer-3);
    border: 1px solid transparent;
    border-radius: var(--border-radius);
}

.alert-primary {
    color: #084298;
    background-color: #cff4fc;
    border-color: #b6effb;
}

.alert-success {
    color: #0f5132;
    background-color: #d1e7dd;
    border-color: #badbcc;
}

.alert-danger {
    color: #842029;
    background-color: #f8d7da;
    border-color: #f5c2c7;
}

.alert-warning {
    color: #664d03;
    background-color: #fff3cd;
    border-color: #ffecb5;
}

.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow-lg);
    padding: var(--spacer-3) var(--spacer-4);
    max-width: 350px;
    z-index: 1060;
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* =====================================================
   Responsive Design
   ===================================================== */
@media (max-width: 991.98px) {
    .app-sidebar {
        transform: translateX(-100%);
        z-index: 1040;
        width: var(--sidebar-width); /* Siempre mantener width completo en mobile */
    }
    
    .app-sidebar.collapsed {
        width: var(--sidebar-width); /* En mobile no colapsar, solo ocultar */
    }
    
    .app-sidebar.show {
        transform: translateX(0);
    }
    
    .app-main {
        margin-left: 0;
    }
    
    .app-main.expanded {
        margin-left: 0; /* En mobile siempre sin margen */
    }
    
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 1030;
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .sidebar-overlay.show {
        opacity: 1;
        visibility: visible;
    }
    
    .page-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-filters {
        flex-direction: column;
    }
    
    .stats-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 767.98px) {
    .app-header {
        padding: 0 var(--spacer-3);
    }
    
    .app-content {
        padding: var(--spacer-3);
    }
    
    .card-body {
        padding: var(--spacer-3);
    }
    
    .modal-dialog {
        margin: var(--spacer-2);
        max-width: calc(100% - 2rem);
    }
    
    .btn {
        padding: var(--spacer-2);
        font-size: 0.8rem;
    }
    
    .page-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .search-input {
        min-width: auto;
        width: 100%;
    }
}

@media (max-width: 575.98px) {
    .app-header {
        height: 60px;
        padding: 0 var(--spacer-2);
    }
    
    .page-title {
        font-size: 1.25rem;
    }
    
    .header-info {
        display: none;
    }
    
    .stats-row {
        gap: var(--spacer-3);
    }
    
    .stat-card {
        padding: var(--spacer-3);
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
}

/* =====================================================
   Utility Classes
   ===================================================== */
.d-none { display: none !important; }
.d-inline { display: inline !important; }
.d-inline-block { display: inline-block !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }

.text-center { text-align: center !important; }
.text-left { text-align: left !important; }
.text-right { text-align: right !important; }

.text-primary { color: var(--primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-success { color: var(--success) !important; }
.text-danger { color: var(--danger) !important; }
.text-warning { color: var(--warning) !important; }
.text-info { color: var(--info) !important; }
.text-muted { color: var(--text-muted) !important; }

.bg-primary { background-color: var(--primary) !important; }
.bg-secondary { background-color: var(--secondary) !important; }
.bg-success { background-color: var(--success) !important; }
.bg-danger { background-color: var(--danger) !important; }
.bg-warning { background-color: var(--warning) !important; }
.bg-info { background-color: var(--info) !important; }
.bg-light { background-color: var(--light) !important; }

.m-0 { margin: 0 !important; }
.m-1 { margin: var(--spacer-1) !important; }
.m-2 { margin: var(--spacer-2) !important; }
.m-3 { margin: var(--spacer-3) !important; }
.m-4 { margin: var(--spacer-4) !important; }
.m-5 { margin: var(--spacer-5) !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: var(--spacer-1) !important; }
.p-2 { padding: var(--spacer-2) !important; }
.p-3 { padding: var(--spacer-3) !important; }
.p-4 { padding: var(--spacer-4) !important; }
.p-5 { padding: var(--spacer-5) !important; }

/* =====================================================
   Modal Styles
   ===================================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 1050;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-dialog {
    max-width: 800px;
    width: 90%;
    margin: auto;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

.modal-dialog.modal-lg {
    max-width: 1000px;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-content {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.modal-header {
    padding: var(--spacer-4);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--light);
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}

.modal-body {
    padding: var(--spacer-4);
    max-height: 70vh;
    overflow-y: auto;
}

.modal-footer {
    padding: var(--spacer-3) var(--spacer-4);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacer-2);
    background: var(--light);
}

.close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.close:hover {
    background: var(--danger-light);
    color: var(--danger);
}

/* Required field indicator */
.required::after {
    content: ' *';
    color: var(--danger);
    font-weight: bold;
}

/* Form improvements */
.form-group {
    margin-bottom: var(--spacer-3);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacer-1);
    font-weight: 500;
    color: var(--text-dark);
}

.form-control:focus {
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.1);
}

/* Grid system */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(-1 * var(--spacer-2));
}

.col,
.col-md-6 {
    flex: 1;
    padding: 0 var(--spacer-2);
}

.col-md-6 {
    flex: 0 0 50%;
    max-width: 50%;
}

@media (max-width: 767px) {
    .col-md-6 {
        flex: 0 0 100%;
        max-width: 100%;
    }
    
    .modal-dialog {
        width: 95%;
        margin: 10px auto;
    }
    
    .modal-body {
        padding: var(--spacer-3);
    }
}

/* =====================================================
   Students Section Styles
   ===================================================== */
.student-info {
    line-height: 1.4;
}

.student-info strong {
    color: var(--text-dark);
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 0;
}

.table th,
.table td {
    padding: var(--spacer-3);
    vertical-align: middle;
    border-top: 1px solid var(--border-color);
    text-align: left;
}

.table thead th {
    border-top: none;
    border-bottom: 2px solid var(--border-color);
    font-weight: 600;
    color: var(--text-dark);
    background: var(--light);
}

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

.table-striped tbody tr:nth-child(odd) {
    background: rgba(var(--primary-rgb), 0.02);
}

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1;
    color: white;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: var(--border-radius);
}

.badge-primary { background-color: var(--primary); }
.badge-secondary { background-color: var(--secondary); }
.badge-success { background-color: var(--success); }
.badge-danger { background-color: var(--danger); }
.badge-warning { background-color: var(--warning); color: var(--text-dark); }
.badge-info { background-color: var(--info); }

/* Button Groups */
.btn-group {
    display: inline-flex;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.btn-group .btn {
    border-radius: 0;
    border-right: none;
}

.btn-group .btn:first-child {
    border-top-left-radius: var(--border-radius);
    border-bottom-left-radius: var(--border-radius);
}

.btn-group .btn:last-child {
    border-top-right-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
    border-right: 1px solid var(--border-color);
}

.btn-group-sm .btn {
    padding: 0.375rem 0.5rem;
    font-size: 0.75rem;
    line-height: 1;
}

/* Form validation */
.is-invalid {
    border-color: var(--danger) !important;
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1) !important;
}

.invalid-feedback {
    color: var(--danger);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: block;
}

/* Modal open body styles */
body.modal-open {
    overflow: hidden;
    padding-right: 17px; /* Scrollbar width */
}

/* Search filters */
.search-filters {
    display: flex;
    gap: var(--spacer-3);
    margin-bottom: var(--spacer-4);
    flex-wrap: wrap;
    align-items: end;
}

.search-input {
    padding-left: 2.5rem;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%236c757d' viewBox='0 0 16 16'%3e%3cpath d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1.007 1.007 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0z'%3e%3c/path%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: 0.75rem center;
    background-size: 1rem;
}

.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 16px 12px;
    padding-right: 2.5rem;
}

/* Groups section styles */
.group-info {
    display: flex;
    align-items: center;
    gap: var(--spacer-2);
}

.color-indicator {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: 0 0 0 1px rgba(0,0,0,0.1);
    flex-shrink: 0;
}

.alert {
    padding: var(--spacer-3);
    margin-bottom: var(--spacer-3);
    border: 1px solid transparent;
    border-radius: var(--border-radius);
}

.alert-info {
    background-color: rgba(52, 152, 219, 0.1);
    border-color: rgba(52, 152, 219, 0.2);
    color: #2980b9;
}
.p-4 { padding: var(--spacer-4) !important; }
.p-5 { padding: var(--spacer-5) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--spacer-1) !important; }
.mb-2 { margin-bottom: var(--spacer-2) !important; }
.mb-3 { margin-bottom: var(--spacer-3) !important; }
.mb-4 { margin-bottom: var(--spacer-4) !important; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: var(--spacer-1) !important; }
.mt-2 { margin-top: var(--spacer-2) !important; }
.mt-3 { margin-top: var(--spacer-3) !important; }
.mt-4 { margin-top: var(--spacer-4) !important; }

.w-100 { width: 100% !important; }
.h-100 { height: 100% !important; }

.rounded { border-radius: var(--border-radius) !important; }
.rounded-lg { border-radius: var(--border-radius-lg) !important; }
.rounded-xl { border-radius: var(--border-radius-xl) !important; }

.shadow-none { box-shadow: none !important; }
.shadow-sm { box-shadow: var(--box-shadow-sm) !important; }
.shadow { box-shadow: var(--box-shadow) !important; }
.shadow-lg { box-shadow: var(--box-shadow-lg) !important; }

/* Print styles */
@media print {
    .app-sidebar,
    .app-header,
    .btn,
    .modal {
        display: none !important;
    }
    
    .app-main {
        margin-left: 0 !important;
    }
    
    .app-content {
        padding: 0 !important;
    }
    
    .card {
        border: 1px solid #000;
        box-shadow: none;
    }
}

/* =====================================================
   Live Class Section Styles - Enhanced Design
   ===================================================== */

.class-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.status-indicator {
    padding: 8px 16px;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    border: none;
    transition: all 0.3s ease;
}

.status-indicator:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.status-indicator.active {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.status-indicator.inactive {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.status-indicator.waiting {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
}

/* Schedule Timeline - Enhanced */
.schedule-timeline {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 20px 0;
}

.schedule-item {
    display: flex;
    align-items: center;
    padding: 20px;
    border-radius: 12px;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid #e2e8f0;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.schedule-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: #e2e8f0;
    transition: all 0.3s ease;
}

.schedule-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    border-color: var(--primary);
}

.schedule-item:hover::before {
    background: var(--primary);
}

.schedule-item.active {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border-color: var(--primary);
    transform: scale(1.02);
    box-shadow: 0 8px 30px rgba(63, 106, 216, 0.25);
}

.schedule-item.active::before {
    background: linear-gradient(180deg, #10b981 0%, #059669 100%);
    width: 6px;
}

.schedule-item.completed {
    opacity: 0.7;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
}

.schedule-item.completed::before {
    background: #64748b;
}

.schedule-item.upcoming {
    background: linear-gradient(135deg, #fefce8 0%, #fef3c7 100%);
    border-color: #fbbf24;
    border-style: dashed;
}

.schedule-item.upcoming::before {
    background: #fbbf24;
}

.schedule-time {
    font-weight: 700;
    color: var(--primary);
    min-width: 140px;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.schedule-time::before {
    content: "🕐";
    font-size: 1.2rem;
}

.schedule-info {
    flex: 1;
    margin-left: 24px;
}

.schedule-info h6 {
    margin: 0 0 6px 0;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.1rem;
}

.schedule-info p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

.schedule-group {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: white;
    margin-left: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    border: 2px solid rgba(255,255,255,0.3);
}

.class-timer {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 12px 20px;
    border-radius: 25px;
    font-weight: 700;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 15px rgba(63, 106, 216, 0.3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.class-timer::before {
    content: "⏱";
    font-size: 1.2rem;
}

/* Student List in Live Class - Enhanced */
.students-list {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.students-list h6 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.students-list h6 i {
    color: var(--primary);
    font-size: 1.2rem;
}

.student-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    border-bottom: 1px solid #f1f5f9;
    transition: all 0.3s ease;
}

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

.student-item:hover {
    background: rgba(63, 106, 216, 0.05);
    margin: 0 -12px;
    padding: 16px 12px;
    border-radius: 8px;
}

.student-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.student-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 4px 12px rgba(63, 106, 216, 0.3);
    border: 3px solid white;
}

.student-details h6 {
    margin: 0 0 4px 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.student-details small {
    color: var(--text-secondary);
    font-weight: 500;
}

.attendance-controls {
    display: flex;
    gap: 8px;
}

.attendance-btn {
    padding: 8px 16px;
    border: 2px solid transparent;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    min-width: 90px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.attendance-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.attendance-btn:hover::before {
    left: 100%;
}

.attendance-btn.presente {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
    border-color: #059669;
}

.attendance-btn.ausente {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
    border-color: #dc2626;
}

.attendance-btn.justificado {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
    border-color: #d97706;
}

.attendance-btn:not(.presente):not(.ausente):not(.justificado) {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: var(--text-secondary);
    border-color: #cbd5e1;
}

.attendance-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}

/* Activity Card - Enhanced */
.class-activity {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.class-activity h6 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.class-activity h6 i {
    color: var(--primary);
    font-size: 1.2rem;
}

.activity-card {
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    border: 2px dashed #cbd5e1;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 16px;
    text-align: center;
    transition: all 0.3s ease;
}

.activity-card.active {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border: 2px solid var(--primary);
    border-style: solid;
    box-shadow: 0 4px 15px rgba(63, 106, 216, 0.2);
}

.activity-card h6 {
    margin: 0 0 8px 0;
    color: var(--text-primary);
    font-weight: 600;
}

.activity-card p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-style: italic;
}

/* Class Controls - Enhanced */
.class-controls {
    padding: 24px 0;
    border-top: 2px solid #f1f5f9;
}

.class-controls .btn {
    min-width: 160px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 12px 24px;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.class-controls .btn-outline-warning {
    border: 2px solid #f59e0b;
    color: #f59e0b;
    background: transparent;
}

.class-controls .btn-outline-warning:hover {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}

.class-controls .btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border: 2px solid #059669;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.class-controls .btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

/* Modal Styles for Attendance Popup - Enhanced */
.attendance-modal .modal-body {
    padding: 30px;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.attendance-student-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    margin-bottom: 16px;
    border-radius: 12px;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid #e2e8f0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.attendance-student-item:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.12);
    border-color: var(--primary);
}

.attendance-student-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.attendance-student-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    box-shadow: 0 4px 12px rgba(63, 106, 216, 0.3);
    border: 3px solid white;
}

.attendance-options {
    display: flex;
    gap: 12px;
}

.attendance-options input[type="radio"] {
    display: none;
}

.attendance-options label {
    padding: 10px 18px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.85rem;
    position: relative;
    overflow: hidden;
}

.attendance-options label::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.attendance-options label:hover::before {
    left: 100%;
}

.attendance-options label[for$="presente"] {
    background: linear-gradient(135deg, #dcfce7 0%, #bbf7d0 100%);
    color: #059669;
    border-color: #10b981;
}

.attendance-options label[for$="ausente"] {
    background: linear-gradient(135deg, #fef2f2 0%, #fecaca 100%);
    color: #dc2626;
    border-color: #ef4444;
}

.attendance-options label[for$="justificado"] {
    background: linear-gradient(135deg, #fffbeb 0%, #fde68a 100%);
    color: #d97706;
    border-color: #f59e0b;
}

.attendance-options input[type="radio"]:checked + label {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    border-width: 3px;
}

.attendance-options input[type="radio"]:checked + label[for$="presente"] {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.attendance-options input[type="radio"]:checked + label[for$="ausente"] {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.attendance-options input[type="radio"]:checked + label[for$="justificado"] {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
}

/* Card Enhancements */
.card {
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.card-header {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-bottom: 1px solid #e2e8f0;
    border-radius: 16px 16px 0 0 !important;
    padding: 20px 24px;
}

.card-body {
    padding: 24px;
}

/* Form Enhancements */
.form-select {
    border-radius: 10px;
    border: 2px solid #e2e8f0;
    padding: 10px 16px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(63, 106, 216, 0.1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: 2px solid var(--primary);
    box-shadow: 0 4px 12px rgba(63, 106, 216, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(63, 106, 216, 0.4);
}

/* No Active Class Enhancement */
#no-active-class {
    text-align: center;
    padding: 60px 40px;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 16px;
    border: 2px dashed #cbd5e1;
}

#no-active-class i {
    background: linear-gradient(135deg, #cbd5e1 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Responsive Design for Live Class - Enhanced */
@media (max-width: 768px) {
    .schedule-item {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    .schedule-time {
        min-width: auto;
        margin-bottom: 8px;
    }
    
    .schedule-info {
        margin-left: 0;
    }
    
    .student-item {
        flex-direction: column;
        gap: 12px;
        padding: 20px 16px;
    }
    
    .attendance-controls {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .class-controls .btn {
        width: 100%;
        margin-bottom: 12px;
    }
    
    .attendance-student-item {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }
    
    .attendance-options {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* =====================================================
   Sistema de Cursos y Lecciones
   ===================================================== */

/* Curso Cards */
.curso-card {
    transition: all 0.3s ease;
    border: 1px solid var(--border-light);
    cursor: pointer;
}

.curso-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: var(--primary);
}

.curso-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.curso-stats {
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    margin: 15px 0;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary);
}

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

.progreso-section {
    padding-top: 15px;
    border-top: 1px solid var(--border-light);
}

/* Detalle de Curso */
.tema-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.1rem;
}

.accordion-button {
    padding: 1.5rem;
}

.accordion-button:not(.collapsed) {
    background-color: var(--primary-light);
    color: var(--primary-dark);
}

/* Lecciones */
.lecciones-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    padding: 20px 0;
}

.leccion-card {
    background: white;
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.leccion-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--primary);
}

.leccion-card.completado {
    border-color: var(--success);
    background: linear-gradient(135deg, #ffffff 0%, #f8fff8 100%);
}

.leccion-card.en_progreso {
    border-color: var(--warning);
    background: linear-gradient(135deg, #ffffff 0%, #fffdf8 100%);
}

.leccion-header {
    display: flex;
    justify-content: between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.leccion-number {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

.leccion-type {
    margin-left: auto;
}

.leccion-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.3;
}

.leccion-meta {
    margin-bottom: 10px;
}

.leccion-progress {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-light);
}

/* Estados de lección */
.leccion-card.no_iniciado .leccion-number {
    background: var(--text-muted);
}

.leccion-card.en_progreso .leccion-number {
    background: var(--warning);
}

.leccion-card.completado .leccion-number {
    background: var(--success);
}

/* Badges de tipo de lección */
.badge.bg-light.text-dark {
    background-color: #f1f3f4 !important;
    color: #5f6368 !important;
    font-weight: 500;
}

/* Responsive para lecciones */
@media (max-width: 768px) {
    .lecciones-grid {
        grid-template-columns: 1fr;
        gap: 15px;
        padding: 15px 0;
    }
    
    .leccion-card {
        padding: 15px;
    }
    
    .leccion-header {
        margin-bottom: 10px;
    }
    
    .leccion-title {
        font-size: 1rem;
    }
}

/* Curso detail responsive */
@media (max-width: 576px) {
    .curso-stats {
        margin: 10px 0;
        padding: 10px;
    }
    
    .stat-number {
        font-size: 1.2rem;
    }
    
    .stat-label {
        font-size: 0.7rem;
    }
    
    .curso-icon {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
    
    .tema-number {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }
}

/* Animaciones para estados de progreso */
.leccion-card.completado::after {
    content: "✓";
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--success);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
}

.leccion-card.en_progreso::after {
    content: "⏳";
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 1.2rem;
}

/* Filtros de cursos */
.page-actions .btn {
    margin-left: 10px;
}

.page-actions .btn:first-child {
    margin-left: 0;
}

/* Loading states */
.lecciones-container .spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

/* Progress bars personalizadas */
.progress {
    height: 6px;
    border-radius: 3px;
    background-color: #e9ecef;
}

.progress-bar {
    border-radius: 3px;
}

/* Hover effects para elementos interactivos */
.accordion-button:hover {
    background-color: var(--primary-light);
}

.nav-link[data-section="cursos"]:hover {
    background-color: var(--primary-light);
}

/* Configuración button special styling */
.btn-outline-primary:hover {
    background-color: var(--primary);
    border-color: var(--primary);
}

/* Cards spacing fix */
.card + .card {
    margin-top: 1rem;
}

/* Estilos para modal de nuevo curso */
.modal-lg {
    max-width: 800px;
}

.form-control-color {
    width: 3rem;
    height: calc(2.25rem + 2px);
    border-radius: 0.375rem;
    border: 1px solid var(--border-color);
}

.curso-icon-preview {
    flex-shrink: 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

#curso-preview {
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 15px;
    background: white;
}

#preview-nombre {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

#preview-descripcion {
    font-size: 0.875rem;
    margin-bottom: 8px;
    line-height: 1.4;
}

.modal-header .modal-title {
    font-weight: 600;
    color: var(--primary);
}

.modal-footer .btn {
    min-width: 120px;
}

/* Responsive para modal */
@media (max-width: 576px) {
    .modal-lg {
        max-width: 95%;
        margin: 1rem auto;
    }
    
    .modal-body {
        padding: 1rem;
    }
    
    .row.g-3 {
        margin: 0.5rem 0;
    }
    
    .curso-icon-preview {
        width: 40px !important;
        height: 40px !important;
        font-size: 1.2rem !important;
    }
}

/* =====================================================
   Modal personalizado para lecciones
   ===================================================== */
.modal {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    background-color: rgba(0, 0, 0, 0.5) !important;
    z-index: 1055 !important;
    display: none !important;
}

.modal.show {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
}

body.modal-open {
    overflow: hidden !important;
}

.modal-dialog {
    position: relative !important;
    width: auto !important;
    max-width: 600px !important;
    margin: 1.75rem !important;
}

.modal-content {
    position: relative !important;
    background-color: white !important;
    border: 1px solid rgba(0, 0, 0, 0.2) !important;
    border-radius: var(--border-radius) !important;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important;
    display: flex !important;
    flex-direction: column !important;
    width: 100% !important;
    outline: 0 !important;
}

.modal-header {
    display: flex !important;
    flex-shrink: 0 !important;
    align-items: center !important;
    justify-content: space-between !important;
    padding: 1rem !important;
    border-bottom: 1px solid var(--border-color) !important;
    border-top-left-radius: calc(var(--border-radius) - 1px) !important;
    border-top-right-radius: calc(var(--border-radius) - 1px) !important;
}

.btn-close {
    padding: 0.25rem !important;
    background: transparent !important;
    border: 0 !important;
    font-size: 1.25rem !important;
    font-weight: 700 !important;
    line-height: 1 !important;
    color: #000 !important;
    text-decoration: none !important;
    opacity: 0.5 !important;
    cursor: pointer !important;
}

.btn-close:hover {
    color: #000 !important;
    text-decoration: none !important;
    opacity: 0.75 !important;
}

.btn-close::before {
    content: "×" !important;
}

/* Eliminar todas las transiciones para máxima velocidad */
* {
    transition: none !important;
    animation: none !important;
}

/* =====================================================
   Estilo especial para botón de agregar lección
   ===================================================== */
.leccion-card.leccion-add-new {
    border: 2px dashed var(--primary) !important;
    background-color: rgba(63, 106, 216, 0.05) !important;
    cursor: pointer !important;
    transition: none !important;
}

.leccion-card.leccion-add-new:hover {
    background-color: rgba(63, 106, 216, 0.1) !important;
    border-color: var(--primary-dark) !important;
    transform: none !important;
}

.leccion-card.leccion-add-new .leccion-content {
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
    align-items: center !important;
    height: 100% !important;
    min-height: 120px !important;
}

.leccion-card.leccion-add-new .fa-plus-circle {
    opacity: 0.7 !important;
}

.leccion-card.leccion-add-new:hover .fa-plus-circle {
    opacity: 1 !important;
}

/* =====================================================
   Estilos para botones de acción en lecciones
   ===================================================== */
.leccion-header {
    position: relative !important;
    display: flex !important;
    justify-content: space-between !important;
    align-items: flex-start !important;
    width: 100% !important;
}

.leccion-actions {
    display: flex !important;
    gap: 4px !important;
    opacity: 0 !important;
    transition: none !important;
}

.leccion-card:hover .leccion-actions {
    opacity: 1 !important;
}

.leccion-actions .btn {
    padding: 4px 8px !important;
    font-size: 12px !important;
    line-height: 1 !important;
    border-radius: 4px !important;
}

.leccion-actions .btn-outline-primary {
    border-color: var(--primary) !important;
    color: var(--primary) !important;
}

.leccion-actions .btn-outline-primary:hover {
    background-color: var(--primary) !important;
    color: white !important;
}

.leccion-actions .btn-outline-danger {
    border-color: var(--danger) !important;
    color: var(--danger) !important;
}

.leccion-actions .btn-outline-danger:hover {
    background-color: var(--danger) !important;
    color: white !important;
}

.leccion-content {
    cursor: pointer !important;
}

.leccion-content:hover {
    background-color: rgba(0, 0, 0, 0.02) !important;
}

/* =====================================================
   Estilos para el sistema de pagos
   ===================================================== */

.payment-card {
    transition: all 0.2s ease;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}

.payment-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-1px);
}

.payment-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(var(--primary), 0.1);
}

.progress {
    height: 4px;
    border-radius: 2px;
    background-color: rgba(0,0,0,0.05);
}

.progress-bar {
    border-radius: 2px;
    transition: width 0.3s ease;
}

.payment-stats-card {
    position: relative;
    overflow: hidden;
}

.payment-stats-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

/* Indicadores de método de pago */
.payment-method-indicator {
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 3px;
    font-weight: 500;
}

.payment-method-efectivo {
    background: #d4edda;
    color: #155724;
}

.payment-method-tarjeta {
    background: #cce7ff;
    color: #004085;
}

.payment-method-transferencia {
    background: #fff3cd;
    color: #856404;
}

.payment-method-otro {
    background: #e2e3e5;
    color: #383d41;
}

/* Estados de pago mejorados */
.badge {
    font-weight: 500;
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
}

/* Modales de pago */
.modal-content {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 40px rgba(0,0,0,0.16);
}

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

/* Filtros de búsqueda */
.input-group-text {
    background-color: var(--light);
    border-color: var(--border-color);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(63, 106, 216, 0.25);
}

/* Tabla responsive en modales */
.table-responsive {
    border-radius: var(--border-radius);
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
}

.table-striped > tbody > tr:nth-of-type(odd) > td {
    background-color: rgba(0,0,0,0.02);
}

.table-hover > tbody > tr:hover > td {
    background-color: rgba(63, 106, 216, 0.05);
}

/* Botones personalizados mejorados */
.btn {
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

/* Animaciones de carga */
.spinner-border {
    width: 2rem;
    height: 2rem;
}

/* Responsive para pagos */
@media (max-width: 768px) {
    .table-responsive > .table {
        min-width: 760px;
    }

    .payment-card .col-md-3 {
        text-align: center !important;
        margin-top: 1rem;
    }
    
    .payment-card .btn {
        margin-bottom: 0.5rem;
        width: 100%;
    }
    
    .modal-dialog.modal-lg {
        max-width: 95%;
        margin: 1rem auto;
    }
    
    .payment-card .row {
        flex-direction: column;
    }
    
    .payment-card .h4 {
        font-size: 1.5rem;
    }
}