:root {
    --primary: var(--theme-primary, #0d1117);
    --secondary: var(--theme-secondary, #161b22);
    --sidebar-bg: var(--theme-sidebar-bg, #1a1a1a);
    --accent: var(--theme-accent, #58a6ff);
    --success: var(--theme-success, #3fb950);
    --warning: var(--theme-warning, #d29922);
    --danger: var(--theme-danger, #f85149);
    --text-primary: var(--theme-text-primary, #c9d1d9);
    --text-secondary: var(--theme-text-secondary, #8b949e);
    --border: var(--theme-border, #30363d);
    --card-bg: var(--theme-card-bg, #21262d);
}

body.light-mode {
    --primary: #f0f2f5;
    --secondary: #ffffff;
    --sidebar-bg: #1a1a2e;
    --accent: #2563eb;
    --success: #16a34a;
    --warning: #d97706;
    --danger: #dc2626;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border: #e5e7eb;
    --card-bg: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    background-color: var(--primary);
    color: var(--text-primary);
    line-height: 1.6;
}

a {
    color: var(--accent);
    text-decoration: none;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-family: inherit;
    font-size: 14px;
}

.btn-primary {
    background: var(--accent);
    color: var(--primary);
}

.btn-primary:hover {
    background: #79b8ff;
}

.btn-outline {
    border: 1px solid var(--border);
    color: var(--text-primary);
    background: transparent;
}

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

.btn-block {
    display: block;
    width: 100%;
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
}

.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-success {
    background: rgba(63, 185, 80, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert-error {
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
}

/* Landing Page */
.landing {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: var(--secondary);
    border-bottom: 1px solid var(--border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 24px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 15px;
}

.hero {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 40px;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.tagline {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 50px;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    max-width: 1000px;
    margin-bottom: 50px;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
}

.feature-icon {
    font-size: 36px;
    margin-bottom: 15px;
}

.feature-card h3 {
    font-size: 16px;
    margin-bottom: 10px;
    color: var(--accent);
}

.feature-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

.stats-preview {
    display: flex;
    gap: 50px;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

footer {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    border-top: 1px solid var(--border);
}

/* Auth Pages */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

.auth-box {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

.auth-box .logo {
    justify-content: center;
    margin-bottom: 30px;
}

.auth-box h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
}

.auth-link {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
    color: var(--text-secondary);
}

.reset-info {
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.reset-info strong {
    color: var(--accent);
}

/* Dashboard Layout */
.dashboard-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 20px;
    position: fixed;
    height: 100vh;
}

.sidebar .logo {
    margin-bottom: 40px;
}

.sidebar-logo {
    margin-bottom: 40px;
    text-align: center;
}

.sidebar-logo img {
    max-width: 180px;
    max-height: 60px;
    object-fit: contain;
}

.nav-menu {
    list-style: none;
    flex: 1;
}

.nav-menu li {
    margin-bottom: 10px;
}

.nav-menu a {
    display: block;
    padding: 12px 15px;
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 14px;
    transition: all 0.2s ease;
}

.nav-menu a:hover {
    background: var(--card-bg);
    color: var(--text-primary);
}

.nav-menu li.active a {
    background: var(--card-bg);
    color: var(--accent);
    border-left: 3px solid var(--accent);
}

.user-info {
    padding-top: 20px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.user-info .username {
    font-size: 14px;
    color: var(--accent);
}

.logout {
    font-size: 12px;
    color: var(--text-secondary);
}

.logout:hover {
    color: var(--danger);
}

.main-content {
    flex: 1;
    margin-left: 250px;
    padding: 30px;
}

.welcome-banner {
    background: linear-gradient(135deg, var(--card-bg) 0%, var(--secondary) 100%);
    border: 1px solid var(--accent);
    border-radius: 12px;
    padding: 25px 30px;
    margin-bottom: 30px;
}

.welcome-banner h2 {
    font-size: 24px;
    color: var(--accent);
    margin-bottom: 8px;
}

.welcome-banner p {
    font-size: 14px;
    color: var(--text-secondary);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
    gap: 20px;
}

.header-left {
    flex: 1;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.dashboard-title {
    font-size: 20px;
    color: var(--text-primary);
    margin: 0;
}

.welcome-text h2 {
    font-size: 18px;
    color: var(--accent);
    margin-bottom: 4px;
}

.welcome-text p {
    font-size: 12px;
    color: var(--text-secondary);
    margin: 0;
}

.page-header h1 {
    font-size: 28px;
}

.score-display {
    background: var(--card-bg);
    border: 1px solid var(--accent);
    border-radius: 8px;
    padding: 15px 25px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.score-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.score-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.stat-icon {
    font-size: 16px;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 12px;
    font-weight: 700;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Progress Section */
.dashboard-sections {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

section h2 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.category-progress {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.category-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 15px;
}

.category-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.category-name {
    font-size: 14px;
    font-weight: 600;
}

.category-count {
    font-size: 12px;
    color: var(--text-secondary);
}

.progress-bar {
    height: 8px;
    background: var(--secondary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* Labs List */
.labs-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.lab-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.lab-info {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.lab-category {
    font-size: 11px;
    color: var(--accent);
    text-transform: uppercase;
}

.lab-title {
    font-size: 14px;
}

.lab-status {
    display: flex;
    align-items: center;
    gap: 15px;
}

.status {
    font-size: 12px;
}

.status.completed {
    color: var(--success);
}

.status.pending {
    color: var(--text-secondary);
}

.view-all {
    display: inline-block;
    margin-top: 15px;
    font-size: 14px;
}

/* Labs Grid */
.category-filter {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.filter-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.filter-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--primary);
}

.labs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.lab-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    transition: all 0.2s ease;
}

.lab-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.lab-card.completed {
    border-color: var(--success);
}

.lab-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.lab-category-badge {
    font-size: 11px;
    padding: 4px 8px;
    background: var(--accent);
    color: var(--primary);
    border-radius: 4px;
    font-weight: 600;
}

.lab-level {
    font-size: 12px;
    color: var(--text-secondary);
}

.lab-title {
    font-size: 16px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.lab-description {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

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

.status-badge {
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
}

.status-badge.completed {
    background: rgba(63, 185, 80, 0.1);
    color: var(--success);
}

.status-badge.pending {
    background: var(--secondary);
    color: var(--text-secondary);
}

/* Lab Detail */
.lab-detail {
    max-width: 800px;
}

.lab-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.lab-details-file {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 15px;
    float: right;
    margin-top: -10px;
}

.lab-details-file .file-icon {
    font-size: 18px;
}

.lab-details-file .file-name {
    font-size: 14px;
    color: var(--text-primary);
}

.lab-details-file .btn {
    margin-left: 5px;
}

/* Details File Modal */
.details-file-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.details-file-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

.details-file-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid var(--border);
}

.details-file-header h3 {
    font-size: 16px;
    color: var(--text-primary);
    margin: 0;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.2s;
}

.close-btn:hover {
    background: var(--secondary);
    color: var(--text-primary);
}

.details-file-body {
    flex: 1;
    overflow: auto;
    padding: 20px;
}

.details-file-iframe {
    width: 100%;
    height: 70vh;
    border: none;
    background: white;
    border-radius: 6px;
}

.details-file-text {
    background: var(--secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 20px;
    max-height: 70vh;
    overflow: auto;
}

.details-file-text pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: inherit;
    font-size: 14px;
    color: var(--text-primary);
    margin: 0;
}

.back-link {
    font-size: 14px;
    color: var(--text-secondary);
}

.back-link:hover {
    color: var(--accent);
}

.lab-meta {
    display: flex;
    gap: 10px;
    align-items: center;
}

.lab-banner {
    margin-bottom: 20px;
    border-radius: 8px;
    overflow: hidden;
}

.lab-banner img {
    width: 100%;
    max-height: 100px;
    object-fit: cover;
}

.details-text {
    font-size: 14px;
    line-height: 1.8;
    white-space: pre-wrap;
}

.lab-detail h1 {
    font-size: 28px;
    margin-bottom: 30px;
}

.lab-section {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
}

.lab-section h2 {
    font-size: 16px;
    margin-bottom: 15px;
    color: var(--accent);
}

.description-text {
    font-size: 14px;
    line-height: 1.8;
}

.objectives-list {
    list-style: none;
    padding-left: 20px;
}

.objectives-list li {
    margin-bottom: 10px;
    position: relative;
}

.objectives-list li::before {
    content: "▹";
    position: absolute;
    left: -20px;
    color: var(--accent);
}

.hints-box {
    background: var(--secondary);
    padding: 15px;
    border-radius: 6px;
    font-size: 13px;
    color: var(--warning);
    border-left: 3px solid var(--warning);
}

.solution-box {
    background: var(--secondary);
    padding: 15px;
    border-radius: 6px;
    border-left: 3px solid var(--success);
}

.solution-box code {
    font-size: 14px;
    color: var(--success);
    word-break: break-all;
}

.lab-actions {
    margin-top: 30px;
}

.btn-complete {
    background: var(--success);
    color: var(--primary);
    font-size: 16px;
    padding: 15px 30px;
}

.btn-complete:hover {
    background: #46c95d;
}

.completed-message {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--card-bg);
    border: 1px solid var(--success);
    border-radius: 8px;
    padding: 15px 20px;
}

.completed-message span:first-child {
    font-size: 18px;
}

.points-earned {
    font-size: 14px;
    color: var(--success);
}

.completion-info {
    margin-top: 20px;
    font-size: 12px;
    color: var(--text-secondary);
}

/* Admin Dashboard */
.admin-stats {
    font-size: 16px;
    color: var(--text-secondary);
}

.total-users {
    color: var(--accent);
}

.users-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: 10px;
    overflow: hidden;
}

.users-table th,
.users-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.users-table th {
    background: var(--secondary);
    font-size: 12px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.users-table td {
    font-size: 14px;
}

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

.username-cell {
    color: var(--accent);
    font-weight: 600;
}

.role-badge {
    font-size: 11px;
    padding: 4px 8px;
    border-radius: 4px;
    text-transform: uppercase;
}

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

.role-badge.user {
    background: var(--accent);
    color: var(--primary);
}

.score-cell {
    font-weight: 700;
    color: var(--success);
}

.labs-count {
    color: var(--text-primary);
}

.date-cell {
    color: var(--text-secondary);
    font-size: 12px;
}

/* Admin Edit User Page */
.edit-user-container {
    max-width: 600px;
}

.edit-user-container .back-link {
    display: inline-block;
    margin-bottom: 20px;
    font-size: 14px;
    color: var(--text-secondary);
}

.edit-user-container .back-link:hover {
    color: var(--accent);
}

.edit-user-container h1 {
    font-size: 24px;
    margin-bottom: 25px;
}

.edit-form {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 30px;
}

.edit-form .form-group {
    margin-bottom: 20px;
}

.edit-form label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.edit-form input,
.edit-form select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
}

.edit-form input:focus,
.edit-form select:focus {
    outline: none;
    border-color: var(--accent);
}

.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.danger-zone {
    background: var(--card-bg);
    border: 1px solid var(--danger);
    border-radius: 10px;
    padding: 25px;
}

.danger-zone h3 {
    color: var(--danger);
    font-size: 16px;
    margin-bottom: 20px;
}

.danger-zone .user-status {
    margin-bottom: 15px;
    font-size: 14px;
}

.status-active {
    color: var(--success);
    font-weight: 600;
}

.status-disabled {
    color: var(--danger);
    font-weight: 600;
}

.danger-actions {
    display: flex;
    gap: 15px;
}

.btn-warning {
    background: var(--warning);
    color: var(--primary);
}

.btn-warning:hover {
    background: #e5ab1e;
}

.btn-success {
    background: var(--success);
    color: var(--primary);
}

.btn-success:hover {
    background: #46c95d;
}

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

.btn-danger:hover {
    background: #ff6b6b;
}

.actions-cell {
    display: flex;
    gap: 8px;
}

/* Invitations Page */
.create-form button {
    white-space: nowrap;
}

.invitations-info {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 15px 20px;
    margin-bottom: 25px;
}

.invitations-info p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

.invitations-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: 10px;
    overflow: hidden;
}

.invitations-table th,
.invitations-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.invitations-table th {
    background: var(--secondary);
    font-size: 12px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.invitations-table td {
    font-size: 14px;
}

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

.code-cell {
    font-family: monospace;
    color: var(--accent);
    font-weight: 600;
}

.status-available {
    color: var(--success);
    font-weight: 600;
}

.status-used {
    color: var(--text-secondary);
    font-weight: 600;
}

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

.empty-state {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px !important;
}

/* Labs Management Table */
.labs-table-container {
    overflow-x: auto;
}

.labs-management-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: 10px;
    overflow: hidden;
}

.labs-management-table th,
.labs-management-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.labs-management-table th {
    background: var(--secondary);
    font-size: 12px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.category-badge {
    font-size: 11px;
    padding: 4px 8px;
    background: var(--accent);
    color: var(--primary);
    border-radius: 4px;
    font-weight: 600;
}

.lab-thumb {
    width: 80px;
    height: 30px;
    object-fit: cover;
    border-radius: 4px;
}

.no-banner {
    color: var(--text-secondary);
    font-size: 12px;
}

/* Edit Lab Form */
.edit-lab-container {
    max-width: 900px;
}

.edit-lab-container .back-link {
    display: inline-block;
    margin-bottom: 20px;
    font-size: 14px;
    color: var(--text-secondary);
}

.edit-lab-container .back-link:hover {
    color: var(--accent);
}

.edit-lab-form {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 25px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.edit-lab-form .form-group {
    margin-bottom: 20px;
}

.edit-lab-form label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 600;
}

.edit-lab-form input,
.edit-lab-form select,
.edit-lab-form textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
}

.edit-lab-form input:focus,
.edit-lab-form select:focus,
.edit-lab-form textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.edit-lab-form textarea {
    resize: vertical;
}

.banner-upload {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.current-banner {
    max-width: 400px;
    max-height: 100px;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.current-banner-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.no-banner-placeholder {
    padding: 30px;
    background: var(--secondary);
    border: 1px dashed var(--border);
    border-radius: 6px;
    text-align: center;
    color: var(--text-secondary);
}

.upload-hint {
    font-size: 12px;
    color: var(--text-secondary);
}

.file-upload {
    margin-top: 10px;
}

.file-upload .current-file {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px;
    background: var(--secondary);
    border-radius: 6px;
    margin-bottom: 10px;
}

.file-upload .file-icon {
    font-size: 18px;
}

.file-upload .file-name {
    font-size: 14px;
    color: var(--text-primary);
}

.file-upload .no-file-placeholder {
    padding: 15px;
    background: var(--secondary);
    border: 1px dashed var(--border);
    border-radius: 6px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

.file-upload input[type="file"] {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
}

.file-upload input[type="file"]:focus {
    outline: none;
    border-color: var(--accent);
}

/* Settings Page */
.settings-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
}

.settings-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 25px;
}

.settings-card h2 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--accent);
}

.settings-form .form-group {
    margin-bottom: 20px;
}

.settings-form label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.settings-form input[type="text"],
.settings-form input[type="file"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
}

.logo-preview img {
    max-width: 150px;
    max-height: 60px;
    object-fit: contain;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.login-logo {
    max-width: 120px;
    max-height: 40px;
}

.company-logo {
    max-width: 200px;
    max-height: 80px;
    object-fit: contain;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.no-logo {
    padding: 30px;
    background: var(--secondary);
    border: 1px dashed var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        display: none;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .dashboard-sections {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 32px;
    }
    
    .stats-preview {
        gap: 30px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}
/* User Avatar in Sidebar */
.user-avatar-section {
    text-align: center;
    padding: 15px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 15px;
}

.user-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent);
    margin-bottom: 8px;
}

.avatar-username {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
}

.profile-link {
    font-size: 12px;
    color: var(--accent);
    text-decoration: none;
    padding: 5px 0;
    display: block;
    transition: color 0.2s;
}

.profile-link:hover {
    color: var(--text-primary);
}

/* Profile Page */
.profile-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
}

.profile-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 25px;
}

.profile-card h2 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--accent);
}

.profile-form .form-group {
    margin-bottom: 20px;
}

.profile-form label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.profile-form input[type="text"],
.profile-form input[type="email"],
.profile-form input[type="password"],
.profile-form input[type="file"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
}

.profile-form input[type="text"]:focus,
.profile-form input[type="email"]:focus,
.profile-form input[type="password"]:focus {
    outline: none;
    border-color: var(--accent);
}

.profile-form input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.avatar-preview {
    margin-bottom: 20px;
    text-align: center;
}

.avatar-img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent);
}

.no-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--secondary);
    border: 3px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.avatar-placeholder {
    font-size: 36px;
    font-weight: 700;
    color: var(--accent);
}

/* Category Sort Buttons */
.category-sort {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.sort-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 600;
}

.sort-btn {
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 12px;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    text-decoration: none;
    background: transparent;
}

.sort-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.sort-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--primary);
    font-weight: 600;
}

.page-header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.page-header-actions .category-sort {
    flex: 1;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 15px;
    left: 15px;
    z-index: 1001;
    display: flex;
    gap: 8px;
}

.theme-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.theme-btn:hover {
    transform: scale(1.1);
    border-color: var(--accent);
}

.theme-btn.active {
    background: var(--accent);
    color: var(--primary);
    border-color: var(--accent);
}

/* Light mode specific adjustments */
body.light-mode .lab-banner img {
    opacity: 0.9;
}

body.light-mode .hints-box {
    background: #fef3c7;
    color: #92400e;
    border-left-color: #d97706;
}

body.light-mode .solution-box {
    background: #dcfce7;
    border-left-color: #16a34a;
}

body.light-mode .solution-box code {
    color: #16a34a;
}

body.light-mode .details-file-iframe {
    background: #f9fafb;
}

body.light-mode .details-file-text {
    background: #f9fafb;
    border-color: #e5e7eb;
}

body.light-mode .avatar-placeholder {
    color: var(--accent);
}

/* Course Management */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.course-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.2s ease;
}

.course-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.course-banner {
    height: 100px;
    overflow: hidden;
}

.course-banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-card-body {
    padding: 15px;
}

.course-card-body h3 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.course-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-size: 12px;
}

.course-lessons {
    color: var(--accent);
    font-weight: 600;
}

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

.course-status.inactive {
    color: var(--danger);
}

.course-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.empty-state-card {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    background: var(--card-bg);
    border: 1px dashed var(--border);
    border-radius: 10px;
    color: var(--text-secondary);
}

/* Course Tree (User View) */
.course-tree {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.course-tree-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}

.course-tree-header {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 20px;
    cursor: pointer;
    transition: background 0.2s;
}

.course-tree-header:hover {
    background: var(--secondary);
}

.expand-icon {
    font-size: 14px;
    color: var(--accent);
    transition: transform 0.2s;
    min-width: 20px;
}

.course-tree-banner {
    width: 80px;
    height: 40px;
    object-fit: cover;
    border-radius: 6px;
}

.course-tree-info {
    flex: 1;
}

.course-tree-info h3 {
    font-size: 16px;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.course-tree-desc {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.course-progress-badge {
    font-size: 11px;
    padding: 3px 8px;
    background: var(--accent);
    color: var(--primary);
    border-radius: 4px;
    font-weight: 600;
}

.course-tree-progress {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 150px;
}

.course-tree-progress .progress-bar {
    flex: 1;
    height: 6px;
    background: var(--secondary);
    border-radius: 3px;
    overflow: hidden;
}

.progress-percent {
    font-size: 12px;
    color: var(--text-secondary);
    min-width: 35px;
    text-align: right;
}

.course-tree-lessons {
    display: none;
    padding: 0 20px 15px;
}

.course-tree-lessons.expanded {
    display: block;
}

.lesson-tree-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 15px;
    margin-bottom: 5px;
    background: var(--secondary);
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.lesson-tree-item:hover {
    border-left-color: var(--accent);
    background: var(--card-bg);
}

.lesson-tree-item.completed {
    border-left-color: var(--success);
}

.lesson-status-icon {
    font-size: 16px;
    min-width: 20px;
    text-align: center;
}

.lesson-tree-item.completed .lesson-status-icon {
    color: var(--success);
}

.lesson-tree-item:not(.completed) .lesson-status-icon {
    color: var(--text-secondary);
}

.lesson-tree-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.lesson-tree-level {
    font-size: 11px;
    color: var(--accent);
    text-transform: uppercase;
}

.lesson-tree-title {
    font-size: 14px;
    color: var(--text-primary);
}

.lesson-tree-status {
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 4px;
}

.lesson-tree-status.completed {
    background: rgba(63, 185, 80, 0.1);
    color: var(--success);
}

.lesson-tree-status.pending {
    background: var(--card-bg);
    color: var(--text-secondary);
}

.no-lessons {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 14px;
}

/* Login Modal */
.login-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    justify-content: center;
    align-items: flex-start;
    padding-top: 80px;
    backdrop-filter: blur(4px);
}

.login-modal-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 30px;
    width: 100%;
    max-width: 400px;
    opacity: 0;
    transform: translateY(-20px);
    transition: all 0.2s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.login-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border);
}

.modal-logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-logo-icon {
    font-size: 20px;
}

.modal-logo-text {
    font-size: 16px;
    font-weight: 700;
    color: var(--accent);
}

.modal-close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.2s;
    line-height: 1;
}

.modal-close-btn:hover {
    background: var(--secondary);
    color: var(--text-primary);
}

.modal-alert {
    margin-bottom: 15px;
}

.login-modal-content .form-group {
    margin-bottom: 18px;
}

.login-modal-content label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    color: var(--text-secondary);
}

.login-modal-content input {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    transition: border-color 0.2s;
}

.login-modal-content input:focus {
    outline: none;
    border-color: var(--accent);
}

.login-modal-content .btn-block {
    margin-top: 5px;
    padding: 12px;
    font-size: 15px;
}

.modal-footer {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid var(--border);
    text-align: center;
}

.modal-footer p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.modal-footer p:last-child {
    margin-bottom: 0;
}

.modal-footer a {
    color: var(--accent);
    text-decoration: none;
}

.modal-footer a:hover {
    text-decoration: underline;
}

/* Fire Flicks Animation */
.fire-flicks-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    z-index: 3000;
    display: none;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.fire-flicks-overlay.active {
    display: flex;
}

.fire-container {
    position: relative;
    width: 200px;
    height: 200px;
    margin-bottom: 30px;
}

.fire {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 100px;
}

.flame {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform-origin: bottom center;
    border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
    animation: flicker 0.5s ease-in-out infinite alternate;
}

.flame-1 {
    width: 80px;
    height: 100px;
    background: linear-gradient(to top, #ff4500, #ff6600, #ffaa00);
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0s;
}

.flame-2 {
    width: 60px;
    height: 80px;
    background: linear-gradient(to top, #ff6600, #ffaa00, #ffcc00);
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0.1s;
}

.flame-3 {
    width: 40px;
    height: 60px;
    background: linear-gradient(to top, #ffaa00, #ffcc00, #fff700);
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0.2s;
}

.flame-4 {
    width: 30px;
    height: 45px;
    background: linear-gradient(to top, #ffcc00, #fff700, #ffffff);
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0.3s;
}

@keyframes flicker {
    0% {
        transform: translateX(-50%) scaleY(1) scaleX(1) rotate(-2deg);
        opacity: 1;
    }
    25% {
        transform: translateX(-50%) scaleY(1.1) scaleX(0.9) rotate(2deg);
        opacity: 0.9;
    }
    50% {
        transform: translateX(-50%) scaleY(0.95) scaleX(1.05) rotate(-1deg);
        opacity: 1;
    }
    75% {
        transform: translateX(-50%) scaleY(1.05) scaleX(0.95) rotate(3deg);
        opacity: 0.95;
    }
    100% {
        transform: translateX(-50%) scaleY(1) scaleX(1) rotate(-3deg);
        opacity: 1;
    }
}

.fire-glow {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 40px;
    background: radial-gradient(ellipse, rgba(255, 100, 0, 0.6) 0%, transparent 70%);
    animation: glow-pulse 1s ease-in-out infinite alternate;
}

@keyframes glow-pulse {
    0% { opacity: 0.6; transform: translateX(-50%) scale(1); }
    100% { opacity: 1; transform: translateX(-50%) scale(1.2); }
}

.fire-particles {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 120px;
}

.particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: #ffaa00;
    border-radius: 50%;
    animation: particle-rise 1.5s ease-out infinite;
}

.particle:nth-child(1) { left: 20%; animation-delay: 0s; background: #ff6600; }
.particle:nth-child(2) { left: 35%; animation-delay: 0.2s; background: #ffaa00; }
.particle:nth-child(3) { left: 50%; animation-delay: 0.4s; background: #ffcc00; }
.particle:nth-child(4) { left: 65%; animation-delay: 0.6s; background: #ff6600; }
.particle:nth-child(5) { left: 80%; animation-delay: 0.8s; background: #ffaa00; }
.particle:nth-child(6) { left: 25%; animation-delay: 0.3s; background: #ffcc00; }
.particle:nth-child(7) { left: 45%; animation-delay: 0.5s; background: #ff6600; }
.particle:nth-child(8) { left: 70%; animation-delay: 0.7s; background: #ffaa00; }

@keyframes particle-rise {
    0% {
        bottom: 0;
        opacity: 1;
        transform: scale(1) translateX(0);
    }
    50% {
        opacity: 0.8;
        transform: scale(0.8) translateX(10px);
    }
    100% {
        bottom: 100px;
        opacity: 0;
        transform: scale(0.3) translateX(-10px);
    }
}

.fire-success-text {
    color: #ffaa00;
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    animation: text-glow 1s ease-in-out infinite alternate;
    text-shadow: 0 0 10px rgba(255, 170, 0, 0.5);
}

@keyframes text-glow {
    0% { text-shadow: 0 0 10px rgba(255, 170, 0, 0.3); }
    100% { text-shadow: 0 0 20px rgba(255, 170, 0, 0.8), 0 0 40px rgba(255, 100, 0, 0.4); }
}

/* Global Navigation Menu */
.global-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    background: var(--secondary);
    border-bottom: 1px solid var(--border);
    z-index: 1500;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.global-menu-container {
    max-width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    padding: 0 15px;
    gap: 10px;
}

.global-menu-brand a {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--accent);
    font-weight: 700;
    font-size: 16px;
    padding: 5px 10px;
    border-radius: 6px;
    transition: background 0.2s;
}

.global-menu-brand a:hover {
    background: var(--card-bg);
}

.menu-brand-logo {
    width: 28px;
    height: 28px;
    object-fit: contain;
    border-radius: 4px;
}

.menu-brand-icon {
    font-size: 20px;
}

.menu-brand-text {
    white-space: nowrap;
}

.global-menu-items {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 5px;
    flex: 1;
}

.menu-item {
    position: relative;
}

.menu-item > a {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 12px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    border-radius: 6px;
    transition: all 0.2s;
    white-space: nowrap;
}

.menu-item > a:hover,
.menu-item.active > a {
    color: var(--text-primary);
    background: var(--card-bg);
}

.menu-item.active > a {
    color: var(--accent);
}

.dropdown-arrow {
    font-size: 10px;
    transition: transform 0.2s;
}

.menu-item.has-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px;
    list-style: none;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    z-index: 1600;
}

.dropdown-menu li a {
    display: block;
    padding: 8px 12px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    border-radius: 4px;
    transition: all 0.2s;
}

.dropdown-menu li a:hover {
    background: var(--secondary);
    color: var(--text-primary);
}

.dropdown-divider {
    height: 1px;
    background: var(--border);
    margin: 4px 8px;
}

.global-menu-right {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
}

.menu-user {
    display: flex;
    align-items: center;
    gap: 8px;
}

.menu-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent);
}

.menu-avatar-placeholder {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.menu-username {
    font-size: 13px;
    color: var(--text-primary);
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.menu-icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 16px;
    transition: all 0.2s;
}

.menu-icon-btn:hover {
    background: var(--card-bg);
    color: var(--text-primary);
}

.menu-btn {
    padding: 6px 14px;
    font-size: 12px;
}

/* Adjust body and main content for global menu */
body {
    padding-top: 50px;
}

.dashboard-layout {
    padding-top: 50px;
}

/* Responsive global menu */
@media (max-width: 768px) {
    .global-menu-container {
        padding: 0 10px;
        gap: 5px;
    }
    
    .menu-brand-text {
        display: none;
    }
    
    .menu-username {
        display: none;
    }
    
    .global-menu-items {
        gap: 2px;
    }
    
    .menu-item > a {
        padding: 8px 8px;
        font-size: 12px;
    }
}

/* Payment Page */
.payment-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.pricing-plans {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.pricing-card {
    background: var(--card-bg);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 25px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.pricing-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.pricing-card.selected {
    border-color: var(--accent);
    background: rgba(88, 166, 255, 0.1);
}

.pricing-card-header h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.pricing-amount {
    font-size: 36px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 5px;
}

.pricing-period {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 0 0 20px 0;
    text-align: left;
}

.pricing-features li {
    padding: 6px 0;
    font-size: 13px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
}

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

.payment-methods-section {
    margin-bottom: 25px;
}

.payment-methods-section h2 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.payment-methods-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.payment-method-card {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 20px;
    background: var(--card-bg);
    border: 2px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.payment-method-card:hover,
.payment-method-card.selected {
    border-color: var(--accent);
}

.payment-method-icon {
    font-size: 28px;
}

.payment-method-info {
    flex: 1;
}

.payment-method-info h3 {
    font-size: 15px;
    color: var(--text-primary);
    margin: 0;
}

.select-method-btn {
    padding: 8px 20px;
    font-size: 13px;
}

.payment-details-panel {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 25px;
    margin-top: 20px;
}

.payment-details-panel h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.bank-details {
    background: var(--secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 15px;
}

.bank-details pre {
    white-space: pre-wrap;
    font-family: inherit;
    font-size: 14px;
    color: var(--text-primary);
    margin: 0;
}

.payment-note {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

/* Payment Success */
.payment-success-container {
    text-align: center;
    padding: 60px 20px;
}

.success-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--success);
    color: white;
    font-size: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    animation: success-bounce 0.6s ease;
}

@keyframes success-bounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.success-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

.session-info {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 15px;
}

/* Admin Payment Settings */
.admin-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 10px;
}

.tab-btn {
    padding: 10px 20px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.tab-btn:hover,
.tab-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--primary);
}

.tab-content {
    display: none;
}

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

.payment-settings-form .settings-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 20px;
}

.payment-settings-form h2 {
    font-size: 16px;
    margin-bottom: 15px;
    color: var(--accent);
}

.methods-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.methods-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.method-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 20px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.method-icon {
    font-size: 24px;
}

.method-info {
    flex: 1;
}

.method-info h3 {
    font-size: 15px;
    margin: 0 0 4px 0;
    color: var(--text-primary);
}

.method-type {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    background: var(--secondary);
    padding: 2px 8px;
    border-radius: 4px;
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--border);
    border-radius: 26px;
    transition: 0.3s;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: 0.3s;
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--success);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(24px);
}

.status-badge.completed {
    background: rgba(63, 185, 80, 0.1);
    color: var(--success);
}

.status-badge.pending {
    background: rgba(210, 153, 34, 0.1);
    color: var(--warning);
}

.status-badge.failed {
    background: rgba(248, 81, 73, 0.1);
    color: var(--danger);
}

/* Course Price & Dates */
.course-meta-row {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-top: 6px;
    flex-wrap: wrap;
}

.course-price-tag {
    font-size: 13px;
    font-weight: 700;
    color: var(--success);
    background: rgba(63, 185, 80, 0.1);
    padding: 3px 10px;
    border-radius: 4px;
}

.course-dates-tag {
    font-size: 11px;
    color: var(--text-secondary);
}

/* Enrollment Actions */
.course-enroll-actions {
    padding: 10px 15px;
    margin-bottom: 8px;
    background: var(--secondary);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.enroll-status {
    font-size: 12px;
    font-weight: 600;
}

.enroll-status.approved { color: var(--success); }
.enroll-status.submitted { color: var(--warning); }

.lesson-tree-item.locked {
    opacity: 0.5;
    pointer-events: none;
}

.lesson-tree-status.locked {
    background: var(--card-bg);
    color: var(--text-secondary);
}

/* Claim Payment */
.claim-payment-container {
    max-width: 700px;
}

.course-summary {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 25px;
}

.course-summary h2 { margin-bottom: 10px; }
.course-price { font-size: 24px; font-weight: 700; color: var(--success); margin-bottom: 5px; }
.course-dates { font-size: 14px; color: var(--text-secondary); }

.payment-steps { margin-bottom: 25px; }

.step {
    display: flex;
    gap: 15px;
    padding: 15px;
    margin-bottom: 10px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.step.completed { border-left: 3px solid var(--success); }

.step-number {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h3 { font-size: 15px; margin-bottom: 5px; }
.step-content p { font-size: 13px; color: var(--text-secondary); }

.claim-form {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 25px;
}

.invoice-history { margin-top: 20px; }
.invoice-history h3 { margin-bottom: 10px; }

.invoice-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    background: var(--secondary);
    border-radius: 6px;
    margin-bottom: 5px;
    font-size: 13px;
}

.invoice-status { font-weight: 700; text-transform: uppercase; }
.invoice-date { color: var(--text-secondary); }
.admin-note { font-size: 12px; color: var(--warning); margin-top: 5px; }

/* Admin Invoices */
.invoice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

.invoice-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
}

.invoice-card.status-approved { border-left: 4px solid var(--success); }
.invoice-card.status-pending { border-left: 4px solid var(--warning); }
.invoice-card.status-submitted { border-left: 4px solid var(--accent); }
.invoice-card.status-rejected { border-left: 4px solid var(--danger); }

.invoice-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.invoice-header h3 { font-size: 16px; margin: 0; }

.invoice-badge {
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 12px;
    text-transform: uppercase;
    font-weight: 700;
}

.invoice-badge.pending { background: rgba(210, 153, 34, 0.2); color: var(--warning); }
.invoice-badge.submitted { background: rgba(88, 166, 255, 0.2); color: var(--accent); }
.invoice-badge.approved { background: rgba(63, 185, 80, 0.2); color: var(--success); }
.invoice-badge.rejected { background: rgba(248, 81, 73, 0.2); color: var(--danger); }

.invoice-details p { font-size: 13px; margin-bottom: 5px; }
.receipt-link { color: var(--accent); }

.invoice-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border);
}

.inline-form { display: inline; }

/* My Enrollments */
.enrollments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

.enrollment-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}

.enrollment-card.status-approved { border-left: 4px solid var(--success); }
.enrollment-card.status-pending { border-left: 4px solid var(--warning); }
.enrollment-card.status-submitted { border-left: 4px solid var(--accent); }
.enrollment-card.status-rejected { border-left: 4px solid var(--danger); }

.enrollment-banner { height: 80px; overflow: hidden; }
.enrollment-banner img { width: 100%; height: 100%; object-fit: cover; }

.enrollment-body { padding: 15px; }
.enrollment-body h3 { font-size: 16px; margin-bottom: 8px; }
.enrollment-price { font-size: 20px; font-weight: 700; color: var(--success); margin-bottom: 5px; }
.enrollment-dates { font-size: 13px; color: var(--text-secondary); margin-bottom: 10px; }

.enrollment-status-badge {
    font-size: 12px;
    padding: 6px 12px;
    border-radius: 6px;
    margin-bottom: 10px;
    font-weight: 600;
}

.enrollment-status-badge.approved { background: rgba(63, 185, 80, 0.15); color: var(--success); }
.enrollment-status-badge.pending { background: rgba(210, 153, 34, 0.15); color: var(--warning); }
.enrollment-status-badge.submitted { background: rgba(88, 166, 255, 0.15); color: var(--accent); }
.enrollment-status-badge.rejected { background: rgba(248, 81, 73, 0.15); color: var(--danger); }

.enrollment-actions {
    padding: 15px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 10px;
}

.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #2ea043; }
.btn-warning { background: var(--warning); color: var(--primary); }
.btn-warning:hover { background: #e0a020; }

/* Sidebar Course Tree */
.sidebar-course-tree {
    margin: 10px 0;
}

.sidebar-tree-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    color: var(--accent);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.2s;
}

.sidebar-tree-header:hover {
    background: var(--card-bg);
}

.tree-expand-icon {
    font-size: 10px;
    transition: transform 0.2s;
    min-width: 12px;
}

.sidebar-tree-content {
    display: none;
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-course-item {
    margin: 2px 0;
}

.sidebar-course-name {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px 6px 20px;
    color: var(--text-secondary);
    font-size: 11px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}

.sidebar-course-name:hover {
    background: var(--card-bg);
    color: var(--text-primary);
}

.sidebar-lessons-list {
    display: none;
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-lesson {
    margin: 1px 0;
}

.sidebar-lesson a {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px 4px 32px;
    color: var(--text-secondary);
    font-size: 10px;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.2s;
}

.sidebar-lesson a:hover {
    background: var(--card-bg);
    color: var(--text-primary);
}

.sidebar-lesson.completed a {
    color: var(--success);
}

.lesson-icon {
    font-size: 10px;
    min-width: 12px;
}

.lesson-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-divider {
    height: 1px;
    background: var(--border);
    margin: 8px 12px;
}

/* Enrollment Management */
.enrollment-row.status-approved { border-left: 3px solid var(--success); }
.enrollment-row.status-pending { border-left: 3px solid var(--warning); }
.enrollment-row.status-submitted { border-left: 3px solid var(--accent); }
.enrollment-row.status-rejected { border-left: 3px solid var(--danger); }
.enrollment-row.status-frozen { border-left: 3px solid #60a5fa; }

.enrollment-badge {
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: 600;
    white-space: nowrap;
}

.enrollment-badge.approved { background: rgba(63, 185, 80, 0.15); color: var(--success); }
.enrollment-badge.pending { background: rgba(210, 153, 34, 0.15); color: var(--warning); }
.enrollment-badge.submitted { background: rgba(88, 166, 255, 0.15); color: var(--accent); }
.enrollment-badge.rejected { background: rgba(248, 81, 73, 0.15); color: var(--danger); }
.enrollment-badge.frozen { background: rgba(96, 165, 250, 0.15); color: #60a5fa; }

.enrollment-actions {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.btn-tiny {
    padding: 3px 6px;
    font-size: 12px;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-tiny:hover {
    background: var(--secondary);
}

.btn-tiny.btn-success { background: var(--success); color: white; border-color: var(--success); }
.btn-tiny.btn-danger { background: var(--danger); color: white; border-color: var(--danger); }
.btn-tiny.btn-warning { background: var(--warning); color: var(--primary); border-color: var(--warning); }
.btn-tiny.btn-info { background: #60a5fa; color: var(--primary); border-color: #60a5fa; }

.inline-change-course {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--secondary);
    border-radius: 6px;
}

.inline-change-course select {
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--card-bg);
    color: var(--text-primary);
    font-size: 13px;
}

.text-muted {
    color: var(--text-secondary);
    font-size: 11px;
}

/* Video Section */
.video-section {
    margin-top: 25px;
}

.video-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    border-radius: 10px;
    overflow: hidden;
    background: #000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.video-iframe {
    width: 100%;
    aspect-ratio: 16 / 9;
    border: none;
}

.video-player {
    width: 100%;
    max-height: 500px;
    display: block;
    border-radius: 10px;
}

@media (max-width: 768px) {
    .video-container {
        border-radius: 6px;
    }
}