/* Digix Stylesheet - Coursera Inspired Clean White Design */
@import url('https://fonts.googleapis.com/css2?family=Google+Sans+Flex:wght@100..900&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    --header-height: 76px;
    /* Color Palette */
    --bg-body: #ffffff;
    --bg-section: #f5f7fa;     /* Light slate blue-gray */
    --bg-card: #ffffff;
    --bg-input: #ffffff;
    
    --primary: #0056d2;        /* Coursera Royal Blue */
    --primary-hover: #00419e;
    --primary-light: #f5f9ff;
    
    --success: #00875a;       /* Clean Green */
    --success-light: rgba(0, 135, 90, 0.08);
    --warning: #f59e0b;       /* Amber */
    --warning-light: rgba(245, 158, 11, 0.08);
    --danger: #ef4444;        /* Rose */
    --danger-light: rgba(239, 68, 68, 0.08);
    --info: #3b82f6;          /* Blue */
    --info-light: rgba(59, 130, 246, 0.08);
    
    --text-main: #1f1f1f;     /* Near Black */
    --text-muted: #5e5e5e;    /* Deep Gray */
    --text-light: #757575;    /* Gray */
    
    --border: #dcdcdc;        /* Clean light gray */
    --border-light: #f1f1f1;  /* Very light gray */
    
    --font-sans: 'Google Sans Flex', 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px 0 rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.12), 0 10px 10px -5px rgba(0, 0, 0, 0.05);
    
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base resets */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    outline: none;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-body);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* Layout Shell */
.app-container {
    display: flex;
    flex-direction: column;
    width: 100vw;
    min-height: 100vh;
}

/* Header Styling (Top Navigation Bar) */
.app-header {
    height: var(--header-height);
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 48px;
    position: sticky;
    top: 0;
    z-index: 3000;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.brand-logo-img {
    height: 38px;
    display: block;
    object-fit: contain;
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.brand:hover .brand-logo-img {
    transform: scale(1.06);
}

.brand-icon {
    width: 32px;
    height: 32px;
    background-color: var(--primary);
    color: white;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 86, 210, 0.25);
}

.brand-text {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.brand-text span {
    color: #1f1f1f;
}

/* Explore subjects dropdown */
.explore-dropdown {
    position: relative;
}

.btn-explore {
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 8px 16px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

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

.explore-menu {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 8px;
    background-color: white;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    box-shadow: var(--shadow-lg);
    width: 220px;
    display: none;
    flex-direction: column;
    overflow: hidden;
    z-index: 100;
}

.explore-menu.active {
    display: flex;
}

.explore-link {
    padding: 12px 18px;
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    border-bottom: 1px solid var(--border-light);
}

.explore-link:last-child {
    border-bottom: none;
}

.explore-link:hover {
    background-color: var(--primary-light);
    color: var(--primary);
}

/* Search bar */
.header-middle {
    flex-grow: 1;
    max-width: 460px;
    margin: 0 24px;
}

.header-search {
    display: flex;
    align-items: center;
    background-color: #ffffff;
    border: 1px solid #757575;
    border-radius: 40px;
    padding: 6px 16px;
    gap: 10px;
    transition: var(--transition);
}

.header-search:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 86, 210, 0.15);
}

.header-search svg {
    color: var(--text-light);
}

.header-search input {
    border: none;
    background: transparent;
    width: 100%;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-main);
}

/* Header Right nav menu */
.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.top-nav-menu {
    display: flex;
    align-items: center;
    gap: 6px;
}

.menu-item {
    color: var(--text-main);
    text-decoration: none;
    padding: 10px 16px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.92rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
}

.menu-item:hover {
    color: var(--primary);
}

.menu-item.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    border-radius: 0;
}

.role-badge {
    background-color: var(--primary-light);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid rgba(0, 86, 210, 0.15);
}

/* User profile triggers */
.user-profile-trigger {
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: var(--transition);
}

.user-profile-trigger:hover .user-avatar {
    transform: scale(1.05);
}

.user-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, #6366f1 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

/* App Main Full Width */
.app-main-full {
    flex-grow: 1;
    min-height: calc(100vh - var(--header-height));
    background-color: #ffffff;
    display: flex;
    flex-direction: column;
}

.view-section {
    display: none;
    animation: fadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.view-section.active {
    display: block;
}

.view-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 24px;
    width: 100%;
}

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

/* ================= COURSERA HERO BANNER ================= */

.hero-section {
    padding: 60px 48px;
    background-color: #ffffff;
    overflow: hidden;
}

.hero-container {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.hero-content {
    flex: 1;
    max-width: 580px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.15;
    letter-spacing: -1.5px;
    margin-bottom: 20px;
}

.hero-text {
    font-size: 1.15rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 36px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.hero-illustration {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 380px;
    position: relative;
}

.illustration-box {
    position: relative;
    width: 320px;
    height: 320px;
}

.illustration-circle {
    position: absolute;
    width: 260px;
    height: 260px;
    background: radial-gradient(circle, rgba(0, 86, 210, 0.08) 0%, rgba(255, 255, 255, 0) 70%);
    border-radius: 50%;
    top: 30px;
    left: 30px;
    z-index: 1;
}

/* Animated Floating cards */
.floating-card {
    position: absolute;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    z-index: 2;
    width: 240px;
    animation: float 6s ease-in-out infinite;
}

.floating-card.c1 {
    top: 20px;
    left: -20px;
    animation-delay: 0s;
}

.floating-card.c2 {
    top: 150px;
    right: -40px;
    animation-delay: 2s;
}

.floating-card.c3 {
    bottom: 20px;
    left: 20px;
    animation-delay: 4s;
}

.icon-circle {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background-color: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.card-info h4 {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 2px;
}

.card-info p {
    font-size: 0.75rem;
    color: var(--text-light);
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
    100% { transform: translateY(0px); }
}

/* ================= PARTNERS BANNER ================= */

.partners-section {
    background-color: var(--bg-section);
    padding: 40px 48px;
    text-align: center;
    border-top: 1px solid #e9ecef;
    border-bottom: 1px solid #e9ecef;
}

.partners-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 24px;
}

.partners-logos {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-around;
    align-items: center;
    gap: 32px;
    flex-wrap: wrap;
}

.logo-item {
    filter: grayscale(100%);
    opacity: 0.55;
    transition: var(--transition);
}

.logo-item:hover {
    filter: grayscale(0%);
    opacity: 1;
}

.logo-text {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-muted);
}

.logo-text.google {
    font-family: Arial, sans-serif;
    letter-spacing: -1.5px;
}

.logo-text.ibm {
    font-family: 'Arial Black', sans-serif;
    color: #0062ff;
    letter-spacing: 0.5px;
}

.logo-text.microsoft {
    font-family: 'Segoe UI', Arial, sans-serif;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 1.25rem;
}

.ms-square {
    display: inline-block;
    width: 8px;
    height: 8px;
}

.logo-text.stanford {
    font-family: Georgia, serif;
    font-style: italic;
    color: #8c1515;
    font-weight: 600;
}

.logo-text.yale {
    font-family: Georgia, serif;
    color: #0f4d92;
    font-weight: 600;
}

/* ================= SUBJECTS & GRID SECTION ================= */

.subjects-section {
    max-width: 1100px;
    margin: 0 auto;
    padding: 64px 24px;
    width: 100%;
}

.section-header {
    margin-bottom: 36px;
}

.section-header h2 {
    font-size: 1.85rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.5px;
    margin-bottom: 8px;
}

.section-header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Category Tabs (Coursera Subject Pills) */
.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 36px;
}

.category-tab {
    background-color: white;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 10px 22px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.category-tab:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.category-tab.active {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* Course Grid */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 28px;
}

/* Coursera style Course Cards */
.course-card {
    background-color: var(--bg-card);
    border: 1px solid #e9ecef;
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: #cbd5e1;
}

.course-image-header {
    height: 140px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 2.2rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

.course-category-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    background-color: rgba(255, 255, 255, 0.95);
    color: var(--primary);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
    box-shadow: var(--shadow-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.course-card-body {
    padding: 18px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.course-partner-text {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-light);
    text-transform: uppercase;
    margin-bottom: 6px;
    letter-spacing: 0.5px;
}

.course-card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 8px;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 2.7em;
}

.course-card-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 12px;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 2.9em;
}

/* Star Ratings & Difficulty */
.course-card-details {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    color: var(--text-light);
    margin-top: auto;
    padding-top: 10px;
}

.rating-stars {
    color: #f59e0b;
    font-weight: 700;
}

.rating-count {
    color: var(--text-light);
}

.course-card-progress {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    font-weight: 500;
}

.progress-track {
    height: 4px;
    background-color: var(--border-light);
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary);
    border-radius: 10px;
    transition: width 0.4s ease;
}

/* ================= 2. DASHBOARD VIEW STYLING ================= */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid #e9ecef;
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}

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

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.stat-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
}

.dashboard-sections {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

.dashboard-box {
    background-color: var(--bg-card);
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.box-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.recent-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.recent-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px;
    background-color: var(--bg-section);
    border-radius: 8px;
    border: 1px solid #e9ecef;
    transition: var(--transition);
}

.recent-item:hover {
    background-color: #fff;
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.recent-course-info {
    flex-grow: 1;
}

.recent-course-title {
    font-weight: 600;
    font-size: 0.92rem;
    margin-bottom: 4px;
}

.recent-course-meta {
    font-size: 0.78rem;
    color: var(--text-light);
}

.recent-progress {
    width: 140px;
    margin-left: 20px;
    margin-right: 20px;
}

.promo-box {
    background: linear-gradient(135deg, var(--primary) 0%, #3b82f6 100%);
    color: white;
    display: flex;
    align-items: center;
    border-radius: 8px;
}

.promo-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.promo-content p {
    font-size: 0.88rem;
    opacity: 0.9;
    line-height: 1.5;
    margin-bottom: 20px;
}

.promo-content .btn {
    background-color: white;
    color: var(--primary);
    font-weight: 600;
}

.promo-content .btn:hover {
    background-color: var(--border-light);
}

/* ================= 3. ADMIN TABLES STYLING ================= */

.admin-table-wrapper {
    background-color: var(--bg-card);
    border: 1px solid #e9ecef;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-top: 10px;
}

.admin-table {
    width: 100%;
    min-width: 700px;
    border-collapse: collapse;
    text-align: left;
}

.admin-table th, .admin-table td {
    padding: 16px 24px;
    border-bottom: 1px solid #e9ecef;
}

.admin-table th {
    background-color: var(--bg-section);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.admin-table tbody tr:last-child td {
    border-bottom: none;
}

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

.admin-table tbody tr:hover {
    background-color: var(--bg-section);
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    font-size: 0.72rem;
    font-weight: 700;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

/* Filter Panel (Reports) */
.filter-panel {
    background-color: var(--bg-card);
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 16px 24px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    box-shadow: var(--shadow-sm);
}

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

.filter-group label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-muted);
}

.form-select {
    font-family: var(--font-sans);
    padding: 8px 12px;
    border-radius: 4px;
    border: 1px solid var(--border);
    background-color: white;
    font-size: 0.88rem;
    color: var(--text-main);
}

/* ================= 4. COURSE PLAYER STYLING ================= */

/* ================= Brainwork Course Player UI Design System ================= */
:root {
    --player-brand-color: #6366f1;
    --player-brand-color-rgb: 99, 102, 241;
    --player-brand-dark: #4f46e5;
    --player-text-color: #2c3e50;
    --player-text-light: #607d8b;
    --player-bg-light: #f5f7f8;
    --player-bg-card: #ffffff;
    --player-border-color: #e0e6ed;
    --player-font-head: 'Google Sans Flex', 'Open Sans', -apple-system, sans-serif;
    --player-font-body: 'Google Sans Flex', 'Open Sans', -apple-system, sans-serif;
    --player-font-ui: 'Google Sans Flex', 'Lato', -apple-system, sans-serif;
    --player-sidebar-width: 320px;
    --player-header-height: 60px;
}

#view-player {
    position: relative;
    z-index: 2000;
}

#view-player.player-preview-mode {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: flex-start !important;
    background-color: #f1f5f9 !important;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    z-index: 3100 !important;
    overflow-y: auto !important;
}

#view-player.player-preview-mode .player-app-container {
    position: relative !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: calc(100vh - 56px) !important;
    transition: all 0.3s ease;
}

#view-player.player-preview-mode .player-app-container.player-preview-tablet {
    width: 768px !important;
    height: 1024px !important;
    max-height: calc(100vh - 100px) !important;
    border: 12px solid #1e293b !important;
    border-radius: 24px !important;
    box-shadow: var(--shadow-2xl) !important;
    margin: 20px auto !important;
    flex-shrink: 0 !important;
    overflow: hidden !important;
}

#view-player.player-preview-mode .player-app-container.player-preview-mobile {
    width: 375px !important;
    height: 812px !important;
    max-height: calc(100vh - 100px) !important;
    border: 12px solid #1e293b !important;
    border-radius: 24px !important;
    box-shadow: var(--shadow-2xl) !important;
    margin: 20px auto !important;
    flex-shrink: 0 !important;
    overflow: hidden !important;
}

/* Enable mobile/tablet layouts for the player when in preview container frames */
.player-preview-tablet .player-menu-toggle,
.player-preview-mobile .player-menu-toggle {
    display: flex !important;
}

.player-preview-tablet .player-sidebar,
.player-preview-mobile .player-sidebar {
    position: absolute !important;
    top: var(--player-header-height) !important;
    height: calc(100% - var(--player-header-height)) !important;
    bottom: 0 !important;
    left: 0 !important;
    transform: translateX(-100%) !important;
    box-shadow: 5px 0 15px rgba(0,0,0,0.05) !important;
}

.player-sidebar-open.player-preview-tablet .player-sidebar,
.player-sidebar-open.player-preview-mobile .player-sidebar {
    transform: translateX(0) !important;
}

.player-sidebar-open.player-preview-tablet .player-sidebar-overlay,
.player-sidebar-open.player-preview-mobile .player-sidebar-overlay {
    display: block !important;
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
}

.player-preview-tablet .player-top-course-title,
.player-preview-mobile .player-top-course-title {
    display: none !important;
}

/* Mobile specific styling for phone emulator preview */
.player-preview-mobile .player-top-header {
    padding: 0 16px !important;
}

.player-preview-mobile .player-top-header-right {
    gap: 12px !important;
}

.player-preview-mobile .player-progress-ring {
    display: none !important;
}

.player-preview-mobile .player-progress-circle-text {
    font-size: 0.75rem !important;
    background-color: var(--player-bg-light) !important;
    padding: 4px 8px !important;
    border-radius: 12px !important;
    border: 1px solid var(--player-border-color) !important;
}

.player-preview-mobile .player-exit-btn {
    padding: 4px 12px !important;
    font-size: 0.7rem !important;
}

.player-preview-mobile .player-bottom-nav {
    padding: 0 16px !important;
    height: 70px !important;
}

.player-preview-mobile .player-nav-btn {
    max-width: 45% !important;
}

.player-preview-mobile .player-nav-btn-title {
    font-size: 0.8rem !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
}

.player-app-container {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100vw;
    height: calc(100vh - var(--header-height));
    height: calc(100dvh - var(--header-height));
    display: flex;
    z-index: 2000;
    background-color: var(--player-bg-light);
    font-family: var(--player-font-body);
    color: var(--player-text-color);
}

/* Sidebar Styling */
.player-sidebar {
    width: var(--player-sidebar-width);
    background-color: var(--player-bg-card);
    border-right: 1px solid var(--player-border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
    z-index: 100;
    flex-shrink: 0;
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.player-sidebar-header {
    padding: 30px 24px 20px 24px;
    border-bottom: 1px solid var(--player-border-color);
}

.player-sidebar-course-title {
    font-family: var(--player-font-ui);
    font-weight: 700;
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 15px;
    color: var(--player-text-color);
}
.player-sidebar-course-title img {
    width: 100%;
    height: 70px;
    object-fit: cover;
    border-radius: 8px;
    display: block;
    box-shadow: var(--shadow-sm);
}

.player-sidebar-progress-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.player-progress-bar-bg {
    width: 100%;
    height: 6px;
    background-color: #eceff1;
    border-radius: 3px;
    overflow: hidden;
}

.player-progress-bar-fill {
    width: 0%;
    height: 100%;
    background-color: var(--player-brand-color);
    transition: width 0.4s ease;
}

.player-progress-text {
    font-family: var(--player-font-ui);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--player-text-light);
}

.player-sidebar-menu {
    flex: 1;
    overflow-y: auto;
    padding: 20px 0;
}

.player-menu-section-header {
    font-family: var(--player-font-ui);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--player-text-light);
    padding: 18px 24px 8px 24px;
    user-select: none;
}

/* Sidebar Menu Items */
.player-menu-item {
    display: flex;
    align-items: center;
    padding: 12px 24px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--player-text-color);
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
    gap: 12px;
}

.player-menu-item:hover {
    background-color: #fafbfc;
    color: var(--player-brand-color);
}

.player-menu-item.active {
    background-color: rgba(99, 102, 241, 0.05);
    color: var(--player-brand-color);
    font-weight: 600;
    border-left-color: var(--player-brand-color);
}

.player-menu-item-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 1.5px solid #b0bec5;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.player-menu-item.completed .player-menu-item-icon {
    background-color: var(--player-brand-color);
    border-color: var(--player-brand-color);
}

.player-menu-item.completed .player-menu-item-icon::after {
    content: '';
    display: block;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) translate(-1px, -1px);
}

.player-menu-item.completed .player-menu-item-icon svg,
.player-menu-item.completed .player-menu-item-icon img {
    display: none;
}

.player-menu-item.active .player-menu-item-icon {
    border-color: var(--player-brand-color);
}

/* Main Content Wrapper */
.player-main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow-x: hidden;
    transition: margin-left 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Header Styling */
.player-top-header {
    height: var(--player-header-height);
    background-color: var(--player-bg-card);
    border-bottom: 1px solid var(--player-border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
    flex-shrink: 0;
}

.player-menu-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--player-text-color);
    display: none; /* Only show on mobile */
    align-items: center;
    justify-content: center;
    padding: 8px;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.player-menu-toggle:hover {
    background-color: #fafbfc;
}

.player-top-course-title {
    font-family: var(--player-font-ui);
    font-weight: 700;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--player-text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-right: 20px;
}

.player-top-header-right {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-left: auto;
}

.player-progress-circle-container {
    display: flex;
    align-items: center;
    gap: 8px;
}

.player-progress-ring {
    transform: rotate(-90deg);
}

.player-progress-ring__circle {
    transition: stroke-dashoffset 0.35s;
    transform-origin: 50% 50%;
    stroke-dasharray: 94.2; /* 2 * PI * r (r=15) */
    stroke-dashoffset: 94.2;
}

.player-progress-circle-text {
    font-family: var(--player-font-ui);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--player-text-color);
}

.player-exit-btn {
    font-family: var(--player-font-ui);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
    border: 1.5px solid var(--player-border-color);
    background-color: transparent;
    color: var(--player-text-color);
    padding: 6px 16px;
    border-radius: 18px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.player-exit-btn:hover {
    border-color: var(--player-brand-color);
    color: var(--player-brand-color);
    background-color: rgba(255, 82, 82, 0.02);
}

/* Content Container */
.player-content-container {
    flex: 1;
    background-color: #ffffff;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

#player-course-iframe {
    width: 100%;
    height: 100%;
    border: none;
    background-color: white;
}

/* Bottom Navigation Bar */
.player-bottom-nav {
    height: 80px;
    background-color: var(--player-bg-card);
    border-top: 1px solid var(--player-border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    flex-shrink: 0;
}

.player-nav-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s ease;
    max-width: 320px;
    width: 100%;
}

.player-nav-btn-label {
    font-family: var(--player-font-ui);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--player-text-light);
    margin-bottom: 4px;
}

.player-nav-btn-title {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--player-text-color);
    transition: color 0.2s ease;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
}

.player-nav-btn:hover .player-nav-btn-title {
    color: var(--player-brand-color);
}

.player-next-btn {
    text-align: right;
    align-items: flex-end;
}

.player-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.player-nav-btn:disabled .player-nav-btn-title {
    color: var(--player-text-light) !important;
}

/* Floating complete overlay for manual courses */
.player-floating-controller {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(203, 213, 225, 0.8);
    border-radius: 30px;
    padding: 10px 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.08);
    z-index: 10;
    animation: slideUp 0.3s ease;
}

.player-floating-controller #player-btn-complete {
    border-radius: 20px;
    padding: 8px 18px;
    font-size: 0.85rem;
}

.floating-text {
    font-size: 0.88rem;
    font-weight: 600;
    color: #475569; /* Slate 600 */
}

/* Sidebar overlay for mobile */
.player-sidebar-overlay {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.4);
    z-index: 95;
    animation: fadeIn 0.3s ease;
}

/* Responsive Styling */
@media (max-width: 900px) {
    .player-menu-toggle {
        display: flex;
    }
    
    .player-sidebar {
        position: fixed;
        top: var(--header-height);
        height: calc(100vh - var(--header-height));
        height: calc(100dvh - var(--header-height));
        bottom: 0;
        left: 0;
        transform: translateX(-100%);
        box-shadow: 5px 0 15px rgba(0,0,0,0.05);
    }
    
    .player-sidebar-open .player-sidebar {
        transform: translateX(0);
    }
    
    .player-sidebar-open .player-sidebar-overlay {
        display: block;
    }
    
    .player-top-course-title {
        display: none; /* Hide on mobile/tablet to save space */
    }
}

@media (max-width: 600px) {
    .player-top-header {
        padding: 0 16px;
    }
    
    .player-top-header-right {
        gap: 12px;
    }
    
    /* Hide progress circle ring, only show percentage text to save space */
    .player-progress-ring {
        display: none;
    }
    
    .player-progress-circle-text {
        font-size: 0.75rem;
        background-color: var(--player-bg-light);
        padding: 4px 8px;
        border-radius: 12px;
        border: 1px solid var(--player-border-color);
    }
    
    /* Exit button - make it compact */
    .player-exit-btn {
        padding: 4px 12px;
        font-size: 0.7rem;
    }
    
    .player-bottom-nav {
        padding: 0 16px;
        height: 70px;
    }
    
    .player-nav-btn {
        max-width: 45%;
    }
    
    .player-nav-btn-title {
        font-size: 0.8rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        width: 100%;
    }
    
    /* Responsive complete button overlay */
    .player-floating-controller {
        flex-direction: column;
        gap: 12px;
        padding: 16px 20px;
        width: calc(100% - 32px);
        max-width: 320px;
        border-radius: 20px;
        bottom: 20px;
        text-align: center;
        box-sizing: border-box;
    }
    
    .floating-text {
        font-size: 0.85rem;
        line-height: 1.4;
        font-weight: 600;
        color: #334155;
    }
    
    .player-floating-controller #player-btn-complete {
        width: 100%;
        border-radius: 25px;
        padding: 10px 20px;
        font-size: 0.88rem;
        justify-content: center;
        margin-top: 2px;
    }
}

/* ================= Buttons & Inputs ================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    gap: 6px;
    text-decoration: none;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 0.95rem;
}

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

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

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

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

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

.btn-danger:hover {
    background-color: #dc2626;
}

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

.btn-success:hover {
    background-color: #059669;
}

.btn-icon {
    padding: 10px;
    border-radius: 4px;
    background-color: white;
    border: 1px solid var(--border);
    color: var(--text-muted);
}

.btn-icon:hover {
    background-color: var(--border-light);
    color: var(--text-main);
}

/* Forms styling */
.form-group {
    margin-bottom: 18px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.form-input, .form-select {
    font-family: var(--font-sans);
    padding: 10px 14px;
    border-radius: 4px;
    border: 1px solid var(--border);
    background-color: white;
    font-size: 0.9rem;
    color: var(--text-main);
    transition: var(--transition);
}

.form-input:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 86, 210, 0.15);
}

.code-font {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    tab-size: 4;
}

/* ================= MODAL DIALOGS ================= */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(15, 23, 42, 0.3);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    opacity: 0;
    transition: opacity 0.2s ease-out;
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background-color: white;
    border-radius: 8px;
    width: 100%;
    max-width: 520px;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    transform: scale(0.95);
    transition: transform 0.2s ease-out;
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-xl {
    width: 95%;
    max-width: 1150px;
}

.modal-lg {
    max-width: 900px;
}

.modal-md {
    max-width: 650px;
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-main);
}

.close-btn {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
}

.close-btn:hover {
    color: var(--text-main);
}

.modal-body {
    padding: 24px;
    max-height: 70vh;
    overflow-y: auto;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* Modal split view */
.modal-split {
    display: flex;
    gap: 28px;
    width: 100%;
}

.modal-split-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    max-height: 55vh;
}

.modal-split-column h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 14px;
    color: var(--text-main);
}

/* Upload dropzone inside modal */
.upload-dropzone {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    background-color: var(--bg-section);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.upload-dropzone:hover {
    border-color: var(--primary);
    background-color: var(--primary-light);
}

.dropzone-icon {
    color: var(--text-light);
    transition: var(--transition);
}

.upload-dropzone:hover .dropzone-icon {
    color: var(--primary);
}

.dropzone-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
}

.dropzone-sub {
    font-size: 0.75rem;
    color: var(--text-light);
}

/* Lesson builder row items */
.lesson-builder-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow-y: auto;
    flex-grow: 1;
    padding-right: 6px;
}

.lesson-builder-row {
    display: flex;
    gap: 10px;
    align-items: center;
    background-color: var(--bg-section);
    padding: 10px;
    border-radius: 4px;
    border: 1px solid var(--border-light);
}

.lesson-builder-row input {
    flex-grow: 1;
}

.editor-help-tip {
    font-size: 0.8rem;
    color: var(--text-muted);
    background-color: var(--info-light);
    padding: 12px;
    border-radius: 4px;
    margin-top: 14px;
    line-height: 1.4;
    border: 1px solid rgba(59, 130, 246, 0.1);
}

/* Toast container */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 4000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background-color: white;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    border-radius: 8px;
    padding: 14px 20px;
    min-width: 280px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    animation: toastSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.toast-close {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-light);
    cursor: pointer;
    line-height: 1;
    margin-left: 10px;
}

.toast-close:hover {
    color: var(--text-main);
}

/* Responsive adjustments */
@media (max-width: 900px) {
    .app-header {
        padding: 0 20px;
    }
    .header-middle {
        display: none;
    }
    .hero-container {
        flex-direction: column;
    }
    .hero-content {
        max-width: 100%;
        text-align: center;
    }
    .hero-title {
        font-size: 2.2rem;
    }
    .hero-actions {
        justify-content: center;
    }
    .hero-illustration {
        display: none;
    }
    .dashboard-sections {
        grid-template-columns: 1fr;
    }
    .modal-split {
        flex-direction: column;
        gap: 20px;
    }
    .modal-split-column.left-details {
        flex: none;
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-light);
        padding-right: 0;
        padding-bottom: 16px;
    }
    .modal-split-column.right-builder {
        max-width: 100%;
        padding-left: 0;
    }
}

/* ================= CAREER SHOWCASE BANNER STYLING ================= */

.career-showcase-banner {
    background: linear-gradient(90deg, #1e70e9 0%, #2f8bee 35%, #42c7ab 75%, #58de82 100%);
    border-radius: 20px;
    padding: 48px;
    display: flex;
    gap: 40px;
    color: white;
    align-items: stretch;
    box-shadow: var(--shadow-xl);
}

.showcase-left {
    width: 250px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.showcase-title {
    font-size: 2rem;
    line-height: 1.25;
    font-weight: 700;
    margin-bottom: 12px;
    color: white;
    letter-spacing: -0.5px;
}

.showcase-subtitle {
    font-size: 0.95rem;
    opacity: 0.92;
    margin-bottom: 28px;
    color: white;
}

.btn-explore-white {
    background-color: white !important;
    color: var(--primary) !important;
    border: none !important;
    padding: 12px 24px !important;
    font-weight: 700 !important;
    border-radius: 6px !important;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: var(--transition);
}

.btn-explore-white:hover {
    background-color: var(--border-light) !important;
    transform: translateY(-1px);
}

.showcase-right {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.showcase-pills {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 0;
}

/* Category Pills inside Showcase Banner */
.showcase-pills .category-tab {
    background: rgba(255, 255, 255, 0.15) !important;
    border: 1px solid rgba(255, 255, 255, 0.25) !important;
    color: white !important;
    border-radius: 30px !important;
    padding: 8px 18px !important;
    font-weight: 600 !important;
    font-size: 0.85rem !important;
    transition: var(--transition) !important;
    box-shadow: none !important;
}

.showcase-pills .category-tab:hover {
    background: rgba(255, 255, 255, 0.25) !important;
    border-color: rgba(255, 255, 255, 0.4) !important;
}

.showcase-pills .category-tab.active {
    background: #1f1f1f !important;
    border-color: #1f1f1f !important;
    color: white !important;
    box-shadow: var(--shadow-md) !important;
}

/* 4 Column Grid for Showcase */
.showcase-right .course-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr) !important;
    gap: 20px !important;
}

/* Course cards inside Showcase */
.showcase-right .course-card {
    background: white;
    border: none;
    border-radius: 16px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.06);
    overflow: hidden;
    height: 100%;
}

.showcase-right .course-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.12);
}

/* Course Card Details (Stars & Type) */
.course-card .course-partner-text {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.course-card .course-card-details {
    display: flex;
    align-items: center;
    font-size: 0.78rem;
    color: var(--text-light);
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px solid var(--border-light);
}

.course-card .rating-stars {
    color: var(--text-main);
    font-weight: 700;
}

.course-card .rating-count {
    color: var(--text-light);
}

/* Specific Header Banners for Google, MS, IBM, Tableau */
.header-banner {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Card 1: Google G Bookmark and Student illustration */
.google-g-badge {
    position: absolute;
    top: 0;
    left: 16px;
    width: 28px;
    height: 42px;
    background: white;
    border-radius: 0 0 4px 4px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 5;
}

.banner-avatar-wrap {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner-avatar {
    font-size: 5rem;
    margin-top: 15px;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.12));
    animation: bounceSlow 3s ease-in-out infinite;
}

@keyframes bounceSlow {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

.banner-label-blue {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    background: #0056d2;
    color: white;
    font-size: 0.72rem;
    font-weight: 800;
    padding: 4px 14px;
    border-radius: 20px;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(0,86,210,0.4);
    white-space: nowrap;
}

/* Card 2 & 3: Microsoft & IBM Blue Ribbons and Inner Cards */
.blue-ribbon-badge {
    position: absolute;
    top: 0;
    right: 16px;
    width: 22px;
    height: 38px;
    background: #0056d2;
    clip-path: polygon(0% 0%, 100% 0%, 100% 100%, 50% 80%, 0% 100%);
    z-index: 5;
    display: flex;
    align-items: center;
    justify-content: center;
}

.blue-ribbon-badge::after {
    content: '🏆';
    font-size: 0.65rem;
    color: white;
    margin-top: -8px;
}

.inner-card {
    width: 82%;
    height: 70%;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    padding: 12px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transform: translateY(10px);
    transition: var(--transition);
}

.course-card:hover .inner-card {
    transform: translateY(5px);
}

.inner-logo-text {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    color: #737373;
}

.inner-title-text {
    font-size: 0.78rem;
    font-weight: 800;
    color: #1f1f1f;
    line-height: 1.3;
}

/* Card 4: Tableau Pill Graphic */
.inner-pill {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 30px;
    padding: 10px 18px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: white;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.pill-icon {
    font-size: 1.2rem;
}

.pill-text {
    font-size: 0.85rem;
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

/* Mobile responsive for Career Showcase Banner */
@media (max-width: 1100px) {
    .career-showcase-banner {
        flex-direction: column;
        padding: 32px;
    }
    .showcase-left {
        width: 100%;
        text-align: center;
        align-items: center;
        margin-bottom: 12px;
    }
    .showcase-right .course-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

@media (max-width: 600px) {
    .showcase-right .course-grid {
        grid-template-columns: 1fr !important;
    }
}

/* ================= 5. AUTHENTICATION & GUEST STYLING ================= */

/* Guest authentication header buttons */
.btn-login-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-main);
    font-weight: 500;
    padding: 8px 18px;
    border-radius: 4px;
    transition: var(--transition);
}

.btn-login-outline:hover {
    background-color: var(--bg-section);
    border-color: var(--text-main);
}

.btn-register-fill {
    background-color: var(--primary);
    border: 1px solid var(--primary);
    color: white !important;
    font-weight: 600;
    padding: 8px 18px;
    border-radius: 4px;
    transition: var(--transition);
}

.btn-register-fill:hover {
    background-color: #004bbb;
    border-color: #004bbb;
    box-shadow: 0 4px 10px rgba(0, 86, 210, 0.2);
}

/* User dropdown menu styling */
.user-profile-container {
    z-index: 100;
}

.user-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    width: 240px;
    background-color: white;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    padding: 12px 8px;
    display: none; /* Controlled by JS toggle */
    flex-direction: column;
    margin-top: 8px;
    animation: fadeInScale 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1000;
}

.user-dropdown-menu.active {
    display: flex;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-5px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.dropdown-user-info {
    padding: 8px 12px;
}

.dropdown-user-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-main);
    margin-bottom: 2px;
}

.dropdown-user-email {
    font-size: 0.78rem;
    color: var(--text-light);
}

.dropdown-icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 6px;
    color: var(--text-main) !important;
    font-size: 0.88rem;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.dropdown-item:hover {
    background-color: var(--bg-section);
    color: var(--primary) !important;
}

.dropdown-item svg {
    width: 16px !important;
    height: 16px !important;
    min-width: 16px !important;
    min-height: 16px !important;
    flex-shrink: 0 !important;
    color: var(--text-light);
    transition: var(--transition);
}

.dropdown-item:hover svg {
    color: var(--primary);
}

.dropdown-item.logout-item {
    color: var(--danger) !important;
}

.dropdown-item.logout-item:hover {
    background-color: var(--danger-light);
    color: var(--danger) !important;
}

.dropdown-item.logout-item svg {
    color: var(--danger);
}

/* Auth Modal Specific Styles */
.auth-modal-content {
    max-width: 440px;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.auth-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 0 24px;
}

.auth-tabs {
    display: flex;
    gap: 16px;
    border-bottom: 2px solid var(--border-light);
    width: 100%;
    margin-right: 12px;
}

.auth-tab-btn {
    background: transparent;
    border: none;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-light);
    padding: 10px 4px;
    cursor: pointer;
    position: relative;
    transition: var(--transition);
}

.auth-tab-btn:hover {
    color: var(--text-main);
}

.auth-tab-btn.active {
    color: var(--primary);
}

.auth-tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary);
}

.auth-modal-body {
    padding: 24px;
}

.auth-tab-content {
    display: none;
}

.auth-tab-content.active {
    display: block;
    animation: authFadeIn 0.25s ease-out;
}

@keyframes authFadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.auth-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 6px;
}

.auth-subtitle {
    font-size: 0.82rem;
    color: var(--text-light);
    line-height: 1.45;
    margin-bottom: 20px;
}

/* Quick login elements */
.quick-logins-section {
    background-color: var(--bg-section);
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 20px;
    border: 1px solid var(--border-light);
}

.quick-login-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 10px;
}

.quick-login-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.quick-login-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background-color: white;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.quick-login-card:hover {
    border-color: var(--primary);
    background-color: rgba(0, 86, 210, 0.02);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.quick-login-card.admin-card:hover {
    border-color: var(--danger);
    background-color: rgba(239, 68, 68, 0.02);
}

.quick-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    color: white;
}

.student-avatar {
    background: linear-gradient(135deg, var(--primary) 0%, #6366f1 100%);
}

.admin-avatar {
    background: linear-gradient(135deg, var(--danger) 0%, #f43f5e 100%);
}

.quick-info {
    flex-grow: 1;
}

.quick-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-main);
}

.quick-role {
    font-size: 0.7rem;
    color: var(--text-light);
}

.auth-divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 16px 0;
    color: var(--text-muted);
    font-size: 0.75rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-light);
}

.auth-divider:not(:empty)::before {
    margin-right: .5em;
}

.auth-divider:not(:empty)::after {
    margin-left: .5em;
}

.btn-auth-submit {
    width: 100%;
    padding: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    margin-top: 10px;
}

/* Quiz Editor Modal Custom CSS */
.quiz-editor-question-card {
    background: #f8fafc;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 20px;
    position: relative;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

.quiz-editor-question-header {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-bottom: 15px;
}

.quiz-editor-answers-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 10px;
}

.quiz-editor-answer-row {
    display: flex;
    gap: 10px;
    align-items: center;
}

.quiz-editor-answer-row .form-input {
    padding: 6px 12px;
    font-size: 0.85rem;
}

/* Asymmetric split layout for manual course builder */
.modal-split-column.left-details {
    flex: 0 0 380px;
    padding-right: 16px;
    border-right: 1px solid var(--border-light);
}

.modal-split-column.right-builder {
    flex: 1;
    padding-left: 16px;
    max-width: calc(100% - 408px); /* prevent overflow, accounting for left-details + gap */
}

/* Specific layout overrides for Manual Course modal to make it larger and easier to see */
#modal-manual-course .modal-content.modal-xl {
    max-width: 1400px;
    width: 96%;
}

#modal-manual-course .modal-body {
    max-height: 85vh;
}

#modal-manual-course .modal-split-column {
    max-height: 75vh;
}

#modal-manual-course .lesson-builder-list {
    max-height: 52vh;
}

/* Specific layout overrides for Category Manager modal to make it larger and easier to see */
#modal-category-manager .modal-content {
    max-width: 1200px;
    width: 95%;
}

#modal-category-manager .modal-body {
    max-height: 80vh;
}

#modal-category-manager .admin-table-wrapper {
    max-height: 480px !important;
}

#modal-category-manager .modal-split-column {
    max-height: 70vh;
}

/* Redesigned builder container */
.lesson-builder-list {
    background-color: #f8fafc;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 16px;
    overflow-y: auto;
    overflow-x: hidden;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 42vh;
}

/* Beautiful modern builder rows */
.lesson-builder-row {
    display: flex;
    gap: 12px;
    align-items: center;
    background-color: white;
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--border-light);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
    transition: all 0.2s ease;
}

.lesson-builder-row:hover {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    border-color: #cbd5e1;
}

/* Hierarchy: sections vs nested items */
.lesson-builder-row.type-section {
    border-left: 4px solid #64748b;
    background-color: #f1f5f9; /* Slate tint for section headers */
    border-color: #cbd5e1;
}

.lesson-builder-row.type-lesson {
    border-left: 4px solid #6366f1;
    margin-left: 24px;
    position: relative;
}

.lesson-builder-row.type-quiz {
    border-left: 4px solid #f59e0b;
    margin-left: 24px;
    position: relative;
}

/* Indented sub-items tree line connector */
.lesson-builder-row.type-lesson::before,
.lesson-builder-row.type-quiz::before {
    content: '';
    position: absolute;
    left: -15px;
    top: -14px;
    width: 10px;
    height: 32px;
    border-left: 2px solid #cbd5e1;
    border-bottom: 2px solid #cbd5e1;
    border-bottom-left-radius: 4px;
    pointer-events: none;
}

/* Redesigned minimal input inside builder */
.lesson-builder-row .lesson-title-input {
    flex-grow: 1;
    border: 1px solid transparent;
    background: transparent;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-main);
    padding: 6px 8px;
    border-radius: 4px;
    transition: all 0.15s ease;
}

.lesson-builder-row .lesson-title-input:hover {
    background-color: #f8fafc;
    border-color: var(--border-light);
}

.lesson-builder-row .lesson-title-input:focus {
    background-color: white;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.1);
    outline: none;
}

.lesson-builder-row.type-section .lesson-title-input {
    font-size: 0.95rem;
    font-weight: 600;
    color: #1e293b;
}

/* Modern pill tags */
.lesson-builder-row-tag {
    font-size: 0.65rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 9999px;
    text-transform: uppercase;
    width: 58px;
    text-align: center;
    flex-shrink: 0;
}

.lesson-builder-row-tag.tag-section {
    color: #475569;
    background-color: #e2e8f0;
    border: 1px solid #cbd5e1;
}

.lesson-builder-row-tag.tag-lesson {
    color: #4f46e5;
    background-color: #eef2ff;
    border: 1px solid #c7d2fe;
}

.lesson-builder-row-tag.tag-quiz {
    color: #b45309;
    background-color: #fffbeb;
    border: 1px solid #fde68a;
}

/* Sleek up/down small circular buttons */
.btn-move-up, .btn-move-down {
    background-color: transparent;
    border: 1px solid var(--border-light) !important;
    color: var(--text-light) !important;
    border-radius: 50% !important;
    width: 24px;
    height: 24px;
    padding: 0 !important;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem !important;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-move-up:hover:not(:disabled), .btn-move-down:hover:not(:disabled) {
    background-color: #f1f5f9;
    border-color: #94a3b8 !important;
    color: var(--text-main) !important;
}

.btn-move-up:disabled, .btn-move-down:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Sleek action outline buttons at the bottom */
.btn-add-module-outline {
    border-color: #cbd5e1 !important;
    color: #475569 !important;
}
.btn-add-module-outline:hover {
    background-color: #e2e8f0 !important;
}

.btn-add-lesson-outline {
    border-color: #c7d2fe !important;
    color: #4f46e5 !important;
}
.btn-add-lesson-outline:hover {
    background-color: #eef2ff !important;
}

.btn-add-quiz-outline {
    border-color: #fde68a !important;
    color: #b45309 !important;
}
.btn-add-quiz-outline:hover {
    background-color: #fffbeb !important;
}

.btn-outline {
    background-color: transparent !important;
    border: 1px solid #cbd5e1 !important;
    color: #475569 !important;
}
.btn-outline:hover {
    background-color: #f1f5f9 !important;
    color: #1e293b !important;
}

/* TinyMCE Modal / Dropdown z-index override */
.tox-tinymce-aux {
    z-index: 5000 !important;
}

/* Manual Course Lesson Content Styles (Responsive & Centered Media) */
.course-content-inner img,
.course-content-inner video,
.course-content-inner audio,
.course-content-inner iframe {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 24px auto;
    border-radius: 8px;
    box-sizing: border-box;
}

.course-content-inner img {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    border: 1px solid #f1f5f9;
    transition: transform 0.2s ease;
}

.course-content-inner img:hover {
    transform: scale(1.01);
}

.course-content-inner video {
    width: 100% !important;
    max-width: 100% !important;
    max-height: 420px !important;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    display: block;
    margin: 24px auto;
}

@media (min-width: 768px) {
    .course-content-inner video {
        max-height: 720px !important;
    }
}

.course-content-inner iframe {
    width: 100%;
    aspect-ratio: 16/9;
    border: none;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

/* ================= COURSE DETAIL PAGE ================= */
#view-course-detail {
    background-color: #ffffff;
    min-height: calc(100vh - var(--header-height));
}

.course-detail-banner {
    position: relative;
    width: 100%;
    height: 380px;
    background-size: cover;
    background-position: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 24px;
    box-sizing: border-box;
}

.course-detail-banner::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.60);
    z-index: 1;
}

.course-detail-banner-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.course-detail-back {
    position: absolute;
    top: 24px;
    left: 48px;
    z-index: 2;
    color: #ffffff;
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    transition: all 0.2s ease;
}

.course-detail-back:hover {
    color: #ffffff;
    background: rgba(15, 23, 42, 0.75);
    transform: translateX(-2px);
}

.course-detail-title {
    color: #ffffff;
    font-size: 2.625rem;
    font-weight: 700;
    line-height: 1.3;
    margin: 0;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

.course-detail-action-btn {
    background-color: #ffffff;
    color: #1e293b;
    border: none;
    padding: 12px 36px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
    transition: all 0.2s ease;
}

.course-detail-action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
    background-color: #f8fafc;
}

.course-detail-body {
    max-width: 900px;
    margin: 0 auto;
    padding: 48px 24px 80px 24px;
}

.course-detail-desc {
    font-size: 1.05rem;
    color: #475569;
    line-height: 1.8;
    text-align: center;
    margin: 0 auto 36px auto;
    max-width: 800px;
}

.course-detail-desc p {
    margin-bottom: 16px;
}

.course-detail-desc p:last-child {
    margin-bottom: 0;
}

.course-detail-divider {
    height: 1px;
    background-color: #e2e8f0;
    margin: 40px 0;
    border: none;
}

.course-detail-syllabus {
    text-align: left;
}

.syllabus-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: #1e293b;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 28px;
}

.syllabus-module {
    margin-bottom: 36px;
}

.syllabus-module-title {
    font-size: 0.82rem;
    font-weight: 700;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 14px;
}

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

.syllabus-lesson-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 16px 24px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.syllabus-lesson-row:hover {
    border-color: #cbd5e1;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
    transform: translateY(-1px);
}

.syllabus-lesson-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: #1e293b;
}

.badge-completed {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: #ff5252;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 0.8rem;
    font-weight: bold;
}

.btn-lesson-details {
    border: 1px solid #cbd5e1;
    color: #64748b;
    background-color: transparent;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.syllabus-lesson-row:hover .btn-lesson-details {
    background-color: #f1f5f9;
    color: #1e293b;
    border-color: #94a3b8;
}

/* ================= FEATURED PROMO SLIDER ================= */
.promo-slider-container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 30px 24px 0 24px;
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
}

.promo-slider-track {
    display: flex;
    gap: 20px;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
}

.promo-slide {
    flex: 0 0 calc(50% - 10px);
    border-radius: 20px;
    padding: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: white;
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
    height: 320px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
}

.promo-slide-content {
    flex: 1;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding-right: 20px;
    max-width: 65%;
}

.promo-slide-badge {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 12px;
    opacity: 0.9;
}

.promo-slide-title {
    font-size: 1.8rem;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
    color: #ffffff;
}

.promo-slide-subtitle {
    font-size: 0.95rem;
    line-height: 1.5;
    opacity: 0.85;
    margin-bottom: 24px;
    max-width: 90%;
}

.btn-promo-cta {
    background-color: #ffffff !important;
    color: #0056d2 !important;
    font-weight: 700 !important;
    padding: 12px 24px !important;
    border-radius: 30px !important;
    border: none !important;
    font-size: 0.9rem !important;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
    cursor: pointer;
}

.btn-promo-cta:hover {
    background-color: #f1f5f9 !important;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

/* Gradients */
.gradient-blue-purple {
    background: linear-gradient(135deg, #1d0979 0%, #4a00e0 50%, #8e2de2 100%);
}

.gradient-royal-blue {
    background: linear-gradient(135deg, #0052d4 0%, #4364f7 50%, #6fb1fc 100%);
}

.gradient-dark-slate {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #475569 100%);
}

/* Has-BG styling for featured course background banner */
.promo-slide.has-bg {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.promo-slide.has-bg.gradient-blue-purple {
    background-image: linear-gradient(90deg, rgba(29, 9, 121, 0.95) 0%, rgba(74, 0, 224, 0.75) 50%, rgba(142, 45, 226, 0.15) 100%), var(--slide-bg);
}

.promo-slide.has-bg.gradient-royal-blue {
    background-image: linear-gradient(90deg, rgba(0, 82, 212, 0.95) 0%, rgba(67, 100, 247, 0.75) 50%, rgba(111, 177, 252, 0.15) 100%), var(--slide-bg);
}

.promo-slide.has-bg.gradient-dark-slate {
    background-image: linear-gradient(90deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 41, 59, 0.75) 50%, rgba(71, 85, 105, 0.15) 100%), var(--slide-bg);
}

/* Visual designs */
.promo-visual {
    flex: 0 0 240px;
    height: 100%;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2;
}

/* Sun Theme */
.sun-theme {
    flex-direction: column;
}

.sun-circle {
    width: 170px;
    height: 170px;
    background: linear-gradient(to bottom, #ff9e00 0%, #ff6000 100%);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #ffffff;
    box-shadow: 0 10px 30px rgba(255, 96, 0, 0.4);
}

.sun-limited {
    font-size: 0.6rem;
    font-weight: 800;
    letter-spacing: 1px;
    margin-bottom: 2px;
    opacity: 0.9;
}

.sun-discount {
    font-size: 2.2rem;
    font-weight: 900;
    line-height: 1;
    letter-spacing: -0.5px;
}

.sun-reflections {
    width: 170px;
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-top: 15px;
}

.sun-reflections span {
    height: 4px;
    background: rgba(255, 255, 255, 0.25);
    border-radius: 2px;
}

.sun-reflections span:nth-child(1) { width: 100%; }
.sun-reflections span:nth-child(2) { width: 85%; margin: 0 auto; }
.sun-reflections span:nth-child(3) { width: 70%; margin: 0 auto; }
.sun-reflections span:nth-child(4) { width: 50%; margin: 0 auto; }
.sun-reflections span:nth-child(5) { width: 30%; margin: 0 auto; }

/* Team Theme */
.team-circle-wrap {
    position: relative;
    width: 180px;
    height: 180px;
}

.team-orange-arc {
    position: absolute;
    top: -10px;
    right: -10px;
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #f97316, #ea580c);
    border-radius: 50%;
    z-index: 1;
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.3);
}

.team-img-placeholder {
    position: absolute;
    width: 145px;
    height: 145px;
    background: linear-gradient(135deg, #ffffff, #e2e8f0);
    border-radius: 50%;
    bottom: 0;
    left: 0;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0056d2;
    border: 4px solid rgba(255,255,255,0.8);
    box-sizing: border-box;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.team-discount-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    z-index: 3;
    background: #0056d2;
    color: white;
    font-size: 0.75rem;
    font-weight: 800;
    padding: 4px 10px;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    text-transform: uppercase;
}

/* AI Theme */
.ai-brain-wrap {
    position: relative;
    width: 180px;
    height: 180px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.ai-glow-orb {
    position: absolute;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, rgba(255,255,255,0) 70%);
    filter: blur(10px);
    z-index: 1;
    animation: pulseGlow 3s infinite alternate;
}

@keyframes pulseGlow {
    0% { transform: scale(0.9); opacity: 0.5; }
    100% { transform: scale(1.1); opacity: 1; }
}

.ai-icon {
    width: 130px;
    height: 130px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    border-radius: 50%;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    border: 2px solid rgba(255,255,255,0.25);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.ai-label {
    position: absolute;
    bottom: 25px;
    right: 15px;
    z-index: 3;
    background: #10b981;
    color: white;
    font-size: 0.75rem;
    font-weight: 800;
    padding: 4px 10px;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

/* Controls */
.promo-slider-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    padding: 0 5px;
}

.promo-slider-dots {
    display: flex;
    gap: 8px;
    align-items: center;
}

.slider-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #cbd5e1;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.slider-dot.active {
    width: 24px;
    border-radius: 4px;
    background-color: #0056d2;
}

.promo-slider-arrows {
    display: flex;
    gap: 10px;
}

.slider-arrow {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid #cbd5e1;
    background-color: #ffffff;
    color: #0f172a;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.slider-arrow:hover {
    background-color: #f8fafc;
    border-color: #94a3b8;
    transform: scale(1.05);
}

.slider-arrow:active {
    transform: scale(0.95);
}

/* Responsive adjustment */
@media (max-width: 1024px) {
    .promo-slide {
        padding: 30px;
        height: 300px;
    }
    .promo-slide-title {
        font-size: 1.5rem;
    }
    .promo-visual {
        flex: 0 0 180px;
    }
    .sun-circle, .team-circle-wrap, .ai-brain-wrap {
        width: 140px;
        height: 140px;
    }
    .team-img-placeholder, .ai-icon {
        width: 110px;
        height: 110px;
    }
    .team-orange-arc {
        width: 90px;
        height: 90px;
    }
    .sun-reflections {
        width: 140px;
    }
}

@media (max-width: 768px) {
    .promo-slider-track {
        gap: 0;
    }
    .promo-slide {
        flex: 0 0 100%;
        height: auto;
        min-height: 280px;
        flex-direction: column-reverse;
        justify-content: center;
        gap: 20px;
        padding: 35px 24px;
        text-align: center;
        align-items: center;
    }
    .promo-slide-content {
        align-items: center;
        padding-right: 0;
        max-width: 100%;
    }
    .promo-slide.has-bg.gradient-blue-purple {
        background-image: linear-gradient(180deg, rgba(29, 9, 121, 0.93) 0%, rgba(74, 0, 224, 0.8) 100%), var(--slide-bg);
    }
    .promo-slide.has-bg.gradient-royal-blue {
        background-image: linear-gradient(180deg, rgba(0, 82, 212, 0.93) 0%, rgba(67, 100, 247, 0.8) 100%), var(--slide-bg);
    }
    .promo-slide.has-bg.gradient-dark-slate {
        background-image: linear-gradient(180deg, rgba(15, 23, 42, 0.93) 0%, rgba(30, 41, 59, 0.8) 100%), var(--slide-bg);
    }
    .promo-slide-subtitle {
        max-width: 100%;
        margin-bottom: 20px;
    }
    .promo-visual {
        flex: 0 0 auto;
        height: auto;
        margin-bottom: 10px;
    }
    .sun-reflections {
        display: none;
    }
    .sun-circle, .team-circle-wrap, .ai-brain-wrap {
        width: 120px;
        height: 120px;
    }
    .team-img-placeholder, .ai-icon {
        width: 95px;
        height: 95px;
    }
    .team-orange-arc {
        width: 75px;
        height: 75px;
    }
}

/* Dynamic featured course banner visual styling */
.banner-theme {
    flex-direction: column;
}
.promo-banner-wrap {
    width: 200px;
    height: 200px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    border: 3px solid rgba(255, 255, 255, 0.2);
    background-color: #f8fafc;
    transition: transform 0.3s ease;
}
.promo-banner-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.promo-banner-wrap:hover {
    transform: scale(1.03);
}

@media (max-width: 1024px) {
    .promo-banner-wrap {
        width: 140px;
        height: 140px;
    }
}

@media (max-width: 768px) {
    .promo-banner-wrap {
        width: 120px;
        height: 120px;
    }
}

/* ================= MOBILE & TABLET RESPONSIVE OPTIMIZATIONS ================= */

/* View Header Flex layout */
.view-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    width: 100%;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mobile-bottom-nav {
    display: none;
}

@media (max-width: 900px) {
    /* Split Column Adjustments for Category Manager & Manual Course Builder */
    .modal-split-column {
        width: 100% !important;
        border-right: none !important;
        padding-right: 0 !important;
        border-bottom: 1px solid var(--border-light);
        padding-bottom: 20px;
        margin-bottom: 10px;
    }
    .modal-split-column:last-child {
        border-bottom: none !important;
        padding-bottom: 0 !important;
        margin-bottom: 0 !important;
    }
    
    /* Mobile Admin Sub-navigation Segmented Control */
    .mobile-admin-navigation {
        display: flex !important;
        background-color: var(--bg-section);
        border-radius: 8px;
        padding: 4px;
        gap: 4px;
        margin-bottom: 24px;
        border: 1px solid var(--border-light);
        width: 100%;
        box-sizing: border-box;
    }
    
    .mobile-admin-nav-item {
        flex: 1;
        text-align: center;
        padding: 8px 12px;
        font-size: 0.8rem;
        font-weight: 600;
        text-decoration: none;
        color: var(--text-light);
        border-radius: 6px;
        transition: all 0.2s ease;
    }
    
    .mobile-admin-nav-item.active {
        background-color: var(--bg-card);
        color: var(--primary);
        box-shadow: var(--shadow-sm);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }
    
    .explore-dropdown,
    .top-nav-menu {
        display: none !important;
    }
    
    .brand-logo-img {
        height: 30px;
    }
    
    .user-dropdown-menu {
        position: fixed;
        bottom: 70px;
        right: 16px;
        top: auto !important;
        margin-top: 0;
        box-shadow: 0 -4px 20px rgba(0,0,0,0.15);
        z-index: 3100;
    }

    /* Mobile bottom navigation bar styling */
    .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 60px;
        background-color: var(--bg-card);
        border-top: 1px solid var(--border-light);
        justify-content: space-around;
        align-items: center;
        z-index: 1000;
        box-shadow: 0 -4px 10px rgba(0,0,0,0.05);
        box-sizing: border-box;
    }
    
    .mobile-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-decoration: none;
        color: var(--text-light);
        font-size: 0.65rem;
        font-weight: 500;
        gap: 4px;
        flex: 1;
        height: 100%;
        transition: color 0.2s ease;
    }
    
    .mobile-nav-item svg {
        stroke-width: 2px;
        transition: transform 0.2s ease;
    }
    
    .mobile-nav-item:hover svg {
        transform: translateY(-1px);
    }
    
    .mobile-nav-item.active {
        color: var(--primary);
    }
    
    body {
        padding-bottom: 60px;
    }
    
    body.in-player-mode {
        padding-bottom: 0;
    }
    
    /* View Header stack vertically on mobile */
    .view-header-flex {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .view-header-flex .btn-primary,
    .view-header-flex .btn-secondary,
    .view-header-flex .btn {
        padding: 8px 16px;
        font-size: 0.82rem;
    }
    
    /* Course overview page responsive overrides */
    .course-detail-banner {
        height: 280px;
        padding: 40px 16px;
    }
    .course-detail-title {
        font-size: 1.8rem !important;
    }
    .course-detail-back {
        left: 20px;
        top: 20px;
    }
    .course-detail-body {
        padding: 30px 16px 60px 16px;
    }
    .course-detail-desc {
        font-size: 0.95rem !important;
        line-height: 1.6;
    }
}

@media (max-width: 600px) {
    /* Modals side margin on mobile screen sizes */
    .modal-content {
        width: calc(100% - 32px) !important;
        margin: 16px !important;
    }
    
    /* Horizontal scrolling category tabs on mobile */
    .category-tabs, .showcase-pills {
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        padding-bottom: 8px;
        margin-bottom: 24px;
        -webkit-overflow-scrolling: touch;
        width: 100%;
        box-sizing: border-box;
        -ms-overflow-style: none;  /* IE and Edge */
        scrollbar-width: none;  /* Firefox */
    }
    .category-tabs::-webkit-scrollbar, .showcase-pills::-webkit-scrollbar {
        display: none; /* Hide scrollbar for Chrome, Safari and Opera */
    }
    .category-tab {
        flex-shrink: 0;
        padding: 8px 16px;
        font-size: 0.85rem;
    }
    
    /* Course grid stack vertically */
    .course-grid {
        grid-template-columns: 1fr !important;
        gap: 20px;
    }
    
    /* Tables responsive horizontal scrolling */
    .admin-table-wrapper {
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch;
    }
    
    .admin-table th, .admin-table td {
        padding: 12px 16px;
        font-size: 0.8rem;
    }

    /* Truncate next/prev button titles in player footer to prevent overlap */
    .player-nav-btn-title {
        max-width: 130px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        font-size: 0.82rem !important;
    }
    
    /* Syllabus lesson row responsive tuning */
    .syllabus-lesson-row {
        padding: 12px 16px !important;
    }
    .btn-lesson-details {
        display: none !important;
    }
    
    /* Main container padding reduction to fit more content on narrow screens */
    .view-container {
        padding: 20px 12px !important;
    }
    
    /* Filter Panel styling on mobile */
    .filter-panel {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 12px !important;
        padding: 16px !important;
    }
    .filter-group {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 6px !important;
    }
    .filter-group label {
        font-size: 0.82rem !important;
    }
    .filter-panel .form-select {
        width: 100% !important;
    }
}

@media (max-width: 480px) {
    /* Header guest buttons resizing to prevent overflow */
    .btn-login-outline, .btn-register-fill {
        padding: 6px 12px !important;
        font-size: 0.8rem !important;
    }
    .guest-auth-buttons {
        gap: 8px !important;
    }
    .app-header {
        padding: 0 12px !important;
    }
    .header-right {
        gap: 8px !important;
    }
    .role-badge {
        font-size: 0.72rem !important;
        padding: 3px 8px !important;
    }
    .user-avatar {
        width: 32px !important;
        height: 32px !important;
        font-size: 0.8rem !important;
    }

    /* Explore Courses Layout Enhancements for narrow mobile screens */
    .explore-courses-section {
        padding: 24px 12px !important;
    }
    .explore-courses-title {
        font-size: 1.6rem !important;
        margin-bottom: 12px !important;
    }
}

/* ================= EXPLORE COURSES SECTION (LINKEDIN STYLE) ================= */

.explore-courses-section {
    background-color: #ffffff;
}

.explore-tab {
    background: none !important;
    border: none !important;
    padding: 12px 4px !important;
    font-weight: 500 !important;
    font-size: 0.95rem !important;
    color: var(--text-muted) !important;
    cursor: pointer !important;
    position: relative !important;
    white-space: nowrap !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    transition: all 0.2s ease !important;
}

.explore-tab:hover {
    color: var(--primary) !important;
}

.explore-tab.active {
    color: var(--text-main) !important;
    font-weight: 600 !important;
}

.explore-tab.active::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--text-main);
}

.explore-course-card {
    flex: 0 0 calc(25% - 15px);
    display: flex;
    flex-direction: column;
    cursor: pointer;
    background: transparent !important;
    border: none !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    padding: 0 !important;
    margin: 0 !important;
}

.explore-course-card .course-image-header-widescreen {
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: 8px;
    overflow: hidden;
    background-size: cover;
    background-position: center;
    position: relative;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.explore-course-card:hover .course-image-header-widescreen {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.slider-nav-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #1f1f1f !important;
    color: white !important;
    border: none !important;
    transition: all 0.2s ease !important;
}

.slider-nav-btn:hover {
    background: var(--primary) !important;
    transform: translateY(-50%) scale(1.08) !important;
    box-shadow: var(--shadow-lg);
}

.slider-nav-btn:active {
    transform: translateY(-50%) scale(0.95) !important;
}

@media (max-width: 1024px) {
    .explore-course-card {
        flex: 0 0 calc(33.333% - 14px) !important; /* 3 cards per row on tablet */
    }
}

@media (max-width: 768px) {
    .explore-courses-section {
        padding: 32px 16px !important;
    }
    .explore-courses-title {
        font-size: 1.8rem !important;
        margin-bottom: 16px !important;
    }
    .explore-tabs-container {
        gap: 20px !important;
        margin-bottom: 20px !important;
    }
    .slider-nav-btn {
        display: none !important; /* Hide arrows on touch screens */
    }
    .explore-course-card {
        flex: 0 0 calc(50% - 10px) !important; /* 2 cards per row on mobile */
    }
}

@media (max-width: 480px) {
    .explore-course-card {
        flex: 0 0 260px !important; /* single card slightly overflowing on small screens */
    }
}

/* Hero Banner Wrapper & Section styles */
.hero-banner-wrapper {
    width: 100%;
    background-color: #f5f5f4; /* Light neutral background matching image */
    overflow: hidden;
    margin-top: 0;
    margin-bottom: 20px; /* Space between banner wrapper and slider */
}

.hero-banner-section {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 48px; /* Balanced side paddings to align with slider */
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    box-sizing: border-box;
}

.hero-banner-content {
    flex: 1;
    max-width: 60%;
    text-align: left;
}

.hero-banner-title {
    font-size: 2.5rem;
    font-weight: 500;
    color: #1f2937;
    line-height: 1.25;
    margin-bottom: 20px;
    font-family: var(--font-sans);
    letter-spacing: -0.5px;
}

.hero-banner-desc {
    font-size: 1.05rem;
    color: #374151;
    line-height: 1.6;
    margin-bottom: 30px;
}

.hero-banner-desc strong {
    font-weight: 700;
    color: #111827;
}

.btn-hero-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary);
    color: #ffffff !important;
    border: none;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: 24px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 10px rgba(0, 86, 210, 0.2);
    text-decoration: none;
}

.btn-hero-cta:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 14px rgba(0, 86, 210, 0.3);
}

.btn-hero-cta:active {
    transform: translateY(1px);
}

.hero-banner-image-container {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    max-width: 40%;
}

.hero-banner-image-circle {
    width: 380px;
    height: 380px;
    overflow: hidden;
    clip-path: url(#rounded-octagon);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* Tablet & Mobile responsive styles */
@media (max-width: 1024px) {
    .hero-banner-section {
        padding: 30px 40px;
        gap: 30px;
    }
    .hero-banner-title {
        font-size: 2.2rem;
    }
    .hero-banner-image-circle {
        width: 300px;
        height: 300px;
    }
}

@media (max-width: 768px) {
    .hero-banner-section {
        flex-direction: column-reverse;
        padding: 30px 24px;
        text-align: center;
        gap: 24px;
        margin: 0 auto;
        width: 100%;
    }
    .hero-banner-content {
        max-width: 100%;
        text-align: center;
    }
    .hero-banner-title {
        font-size: 1.8rem;
        margin-bottom: 12px;
    }
    .hero-banner-desc {
        font-size: 0.95rem;
        margin-bottom: 20px;
    }
    .hero-banner-image-container {
        max-width: 100%;
        justify-content: center;
    }
    .hero-banner-image-circle {
        width: 240px;
        height: 240px;
    }
}

/* Global Preloader */
#app-preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: #ffffff;
    z-index: 99999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 0.4s ease, visibility 0.4s ease;
    opacity: 1;
    visibility: visible;
}

#app-preloader.fade-out {
    opacity: 0;
    visibility: hidden;
}

.preloader-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid #f1f5f9;
    border-top: 3px solid #0056d2;
    border-radius: 50%;
    animation: preloader-spin 0.8s linear infinite;
    margin-bottom: 16px;
}

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