/*
 * CYBERPUNK HACKER THEME
 * Sahm Academy - Futuristic Dark UI
 *
 * Neon magenta & terminal-green highlights
 * Glowing animations & terminal-style elements
 * Developer-focused typography
 * Fully responsive & RTL-ready
 */

/* ========================================
   1. CSS CUSTOM PROPERTIES (THEME VARIABLES)
   ======================================== */
:root {
    /* Primary Neon Colors */
    --neon-magenta: #ff00ff;
    --neon-magenta-light: #ff66ff;
    --neon-magenta-dark: #cc00cc;
    --neon-magenta-glow: rgba(255, 0, 255, 0.5);

    /* Terminal Green Colors - Changed to White/Gray */
    --terminal-green: #ffffff;
    --terminal-green-light: #cccccc;
    --terminal-green-dark: #999999;
    --terminal-green-glow: rgba(255, 255, 255, 0.3);

    /* Cyber Blue Accent */
    --cyber-blue: #00d4ff;
    --cyber-blue-light: #66e5ff;
    --cyber-blue-dark: #00a8cc;
    --cyber-blue-glow: rgba(0, 212, 255, 0.5);

    /* Warning/Alert Colors */
    --cyber-yellow: #ffff00;
    --cyber-orange: #ff6600;
    --cyber-red: #ff0040;
    --cyber-red-glow: rgba(255, 0, 64, 0.5);

    /* Dark Background Palette */
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #141414;
    --bg-card: #0a0a0a;
    --bg-card-hover: #1a1a1a;
    --bg-input: #000000;

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted: #b0b0b0;
    --text-terminal: var(--terminal-green);

    /* Border Colors */
    --border-color: #2a2a3a;
    --border-glow: var(--neon-magenta);

    /* Gradients */
    --gradient-magenta: linear-gradient(135deg, var(--neon-magenta) 0%, var(--neon-magenta-dark) 100%);
    --gradient-green: linear-gradient(135deg, var(--terminal-green) 0%, var(--terminal-green-dark) 100%);
    --gradient-cyber: linear-gradient(135deg, var(--neon-magenta) 0%, var(--cyber-blue) 100%);
    --gradient-dark: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);

    /* Shadows & Glows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --glow-magenta: 0 0 20px var(--neon-magenta-glow), 0 0 40px var(--neon-magenta-glow);
    --glow-green: 0 0 20px var(--terminal-green-glow), 0 0 40px var(--terminal-green-glow);
    --glow-blue: 0 0 20px var(--cyber-blue-glow), 0 0 40px var(--cyber-blue-glow);

    /* Typography */
    --font-primary: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    --font-display: 'Orbitron', 'Rajdhani', sans-serif;
    --font-body: 'Inter', 'Segoe UI', sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-xxl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ========================================
   2. BASE STYLES & RESET
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Scanline Effect Overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.1) 2px,
        rgba(0, 0, 0, 0.1) 4px
    );
    pointer-events: none;
    z-index: 9999;
    opacity: 0.3;
}

/* Grid Background Pattern */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(255, 0, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 0, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: -1;
}

/* ========================================
   3. TYPOGRAPHY
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: var(--space-md);
}

h1 {
    font-size: 2.5rem;
    background: var(--gradient-cyber);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px var(--neon-magenta-glow);
}

h2 {
    font-size: 2rem;
    color: var(--neon-magenta);
    text-shadow: 0 0 20px var(--neon-magenta-glow);
}

h3 {
    font-size: 1.5rem;
    color: var(--terminal-green);
    text-shadow: 0 0 15px var(--terminal-green-glow);
}

h4, h5, h6 {
    color: var(--cyber-blue);
}

p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

a {
    color: var(--neon-magenta);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--neon-magenta-light);
    text-shadow: 0 0 10px var(--neon-magenta-glow);
}

code, pre, .terminal-text {
    font-family: var(--font-primary);
}

code {
    background: var(--bg-tertiary);
    color: var(--terminal-green);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
    border: 1px solid var(--border-color);
}

pre {
    background: var(--bg-secondary);
    color: var(--terminal-green);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow-x: auto;
    position: relative;
}

pre::before {
    content: '$ ';
    color: var(--neon-magenta);
}

/* ========================================
   4. NAVIGATION BAR
   ======================================== */
.navbar {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%) !important;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 20px rgba(255, 0, 255, 0.1);
    padding: var(--space-md) 0;
    position: relative;
}

.navbar::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-cyber);
    animation: scanline 3s linear infinite;
}

@keyframes scanline {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.navbar-brand {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: var(--gradient-cyber);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.navbar-brand::before {
    content: '>';
    color: var(--terminal-green);
    margin-right: 8px;
    -webkit-text-fill-color: var(--terminal-green);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.nav-link {
    font-family: var(--font-primary);
    color: var(--text-secondary) !important;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    padding: var(--space-sm) var(--space-md) !important;
    position: relative;
    transition: var(--transition-fast);
}

.nav-link::before {
    content: '[';
    color: var(--neon-magenta);
    opacity: 0;
    transition: var(--transition-fast);
    margin-right: 4px;
}

.nav-link::after {
    content: ']';
    color: var(--neon-magenta);
    opacity: 0;
    transition: var(--transition-fast);
    margin-left: 4px;
}

.nav-link:hover {
    color: var(--neon-magenta) !important;
    text-shadow: 0 0 10px var(--neon-magenta-glow);
}

.nav-link:hover::before,
.nav-link:hover::after {
    opacity: 1;
}

.nav-link.active {
    color: var(--terminal-green) !important;
    text-shadow: 0 0 10px var(--terminal-green-glow);
}

.navbar-toggler {
    border: 1px solid var(--neon-magenta);
    padding: var(--space-sm);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23ff00ff' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ========================================
   5. BUTTONS
   ======================================== */
.btn {
    font-family: var(--font-primary);
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
    cursor: pointer;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-slow);
}

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

/* Primary Button - Neon Magenta */
.btn-primary {
    background: var(--gradient-magenta);
    border-color: var(--neon-magenta);
    color: var(--text-primary);
    box-shadow: 0 0 15px var(--neon-magenta-glow);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--neon-magenta-light);
    border-color: var(--neon-magenta-light);
    box-shadow: var(--glow-magenta);
    transform: translateY(-2px);
    color: var(--bg-primary);
}

/* Success Button - Terminal Green */
.btn-success {
    background: var(--gradient-green);
    border-color: var(--terminal-green);
    color: var(--bg-primary);
    box-shadow: 0 0 15px var(--terminal-green-glow);
}

.btn-success:hover,
.btn-success:focus {
    background: var(--terminal-green-light);
    border-color: var(--terminal-green-light);
    box-shadow: var(--glow-green);
    transform: translateY(-2px);
    color: var(--bg-primary);
}

/* Info Button - Cyber Blue */
.btn-info {
    background: linear-gradient(135deg, var(--cyber-blue) 0%, var(--cyber-blue-dark) 100%);
    border-color: var(--cyber-blue);
    color: var(--bg-primary);
    box-shadow: 0 0 15px var(--cyber-blue-glow);
}

.btn-info:hover,
.btn-info:focus {
    background: var(--cyber-blue-light);
    border-color: var(--cyber-blue-light);
    box-shadow: var(--glow-blue);
    transform: translateY(-2px);
    color: var(--bg-primary);
}

/* Outline Buttons */
.btn-outline-primary {
    background: transparent;
    border: 2px solid var(--neon-magenta);
    color: var(--neon-magenta);
}

.btn-outline-primary:hover {
    background: var(--neon-magenta);
    color: var(--bg-primary);
    box-shadow: var(--glow-magenta);
}

.btn-outline-success {
    background: transparent;
    border: 2px solid var(--terminal-green);
    color: var(--terminal-green);
}

.btn-outline-success:hover {
    background: var(--terminal-green);
    color: var(--bg-primary);
    box-shadow: var(--glow-green);
}

/* Danger Button */
.btn-danger {
    background: linear-gradient(135deg, var(--cyber-red) 0%, #cc0033 100%);
    border-color: var(--cyber-red);
    color: var(--text-primary);
    box-shadow: 0 0 15px var(--cyber-red-glow);
}

.btn-danger:hover {
    box-shadow: 0 0 25px var(--cyber-red-glow), 0 0 50px var(--cyber-red-glow);
    transform: translateY(-2px);
}

/* ========================================
   6. CARDS
   ======================================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    overflow: hidden;
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-cyber);
    opacity: 0;
    transition: var(--transition-normal);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--neon-magenta);
    box-shadow: var(--shadow-lg), 0 0 30px var(--neon-magenta-glow);
}

.card:hover::before {
    opacity: 1;
}

.card-header {
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-md) var(--space-lg);
    font-family: var(--font-display);
    letter-spacing: 0.05em;
}

.card-body {
    padding: var(--space-lg);
}

.card-title {
    font-family: var(--font-display);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

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

.card-footer {
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-md) var(--space-lg);
}

/* Course Card Specific */
.course-card {
    height: 100%;
}

.course-card .card-img-top {
    height: 180px;
    object-fit: cover;
    border-bottom: 2px solid var(--neon-magenta);
    filter: saturate(0.8);
    transition: var(--transition-normal);
}

.course-card:hover .card-img-top {
    filter: saturate(1.2);
}

/* Stat Cards */
.stat-card {
    position: relative;
    overflow: hidden;
}

.stat-card.magenta {
    border-left: 4px solid var(--neon-magenta);
}

.stat-card.green {
    border-left: 4px solid #666666;
}

.stat-card.blue {
    border-left: 4px solid var(--cyber-blue);
}

.stat-card.yellow {
    border-left: 4px solid var(--cyber-yellow);
}

.stat-card .stat-icon {
    font-size: 2.5rem;
    opacity: 0.2;
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
}

.stat-card .stat-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
}

.stat-card.magenta .stat-value {
    color: var(--neon-magenta);
    text-shadow: 0 0 10px var(--neon-magenta-glow);
}

.stat-card.green .stat-value {
    color: #ffffff;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.stat-card.blue .stat-value {
    color: var(--cyber-blue);
    text-shadow: 0 0 10px var(--cyber-blue-glow);
}

/* ========================================
   7. FORMS & INPUTS
   ======================================== */
.form-control,
.form-select {
    font-family: var(--font-primary);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: var(--space-sm) var(--space-md);
    transition: var(--transition-fast);
}

.form-control:focus,
.form-select:focus {
    background: var(--bg-input);
    border-color: var(--neon-magenta);
    box-shadow: 0 0 0 3px var(--neon-magenta-glow);
    color: var(--text-primary);
    outline: none;
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-label {
    font-family: var(--font-primary);
    font-size: 0.85rem;
    color: var(--terminal-green);
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}

.form-label::before {
    content: '// ';
    color: var(--text-muted);
}

.form-text {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Input Groups */
.input-group-text {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--neon-magenta);
}

/* Validation States */
.form-control.is-invalid {
    border-color: var(--cyber-red);
    box-shadow: 0 0 0 3px var(--cyber-red-glow);
}

.form-control.is-valid {
    border-color: var(--terminal-green);
    box-shadow: 0 0 0 3px var(--terminal-green-glow);
}

.invalid-feedback {
    color: var(--cyber-red);
    font-size: 0.8rem;
}

.valid-feedback {
    color: var(--terminal-green);
    font-size: 0.8rem;
}

/* Checkboxes & Radios */
.form-check-input {
    background: var(--bg-input);
    border: 2px solid var(--border-color);
}

.form-check-input:checked {
    background: var(--neon-magenta);
    border-color: var(--neon-magenta);
    box-shadow: 0 0 10px var(--neon-magenta-glow);
}

.form-check-label {
    color: var(--text-secondary);
}

/* ========================================
   8. TABLES
   ======================================== */
.table {
    color: var(--text-primary);
    border-color: var(--border-color);
}

.table thead {
    background: var(--bg-tertiary);
}

.table thead th {
    font-family: var(--font-display);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--neon-magenta);
    border-bottom: 2px solid var(--neon-magenta);
    padding: var(--space-md);
}

.table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

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

.table tbody td {
    padding: var(--space-md);
    vertical-align: middle;
}

.table-dark {
    background: var(--bg-secondary);
}

/* ========================================
   9. BADGES & PILLS
   ======================================== */
.badge {
    font-family: var(--font-primary);
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 0.35em 0.65em;
    border-radius: var(--radius-sm);
}

.badge.bg-primary,
.bg-primary {
    background: var(--neon-magenta) !important;
    box-shadow: 0 0 10px var(--neon-magenta-glow);
}

.badge.bg-success,
.bg-success {
    background: var(--terminal-green) !important;
    color: var(--bg-primary) !important;
    box-shadow: 0 0 10px var(--terminal-green-glow);
}

.badge.bg-info,
.bg-info {
    background: var(--cyber-blue) !important;
    color: var(--bg-primary) !important;
    box-shadow: 0 0 10px var(--cyber-blue-glow);
}

.badge.bg-warning,
.bg-warning {
    background: var(--cyber-yellow) !important;
    color: var(--bg-primary) !important;
}

.badge.bg-danger,
.bg-danger {
    background: var(--cyber-red) !important;
    box-shadow: 0 0 10px var(--cyber-red-glow);
}

.badge.bg-secondary,
.bg-secondary {
    background: #333333 !important;
    color: #ffffff !important;
}

.badge.bg-dark,
.bg-dark {
    background: var(--bg-primary) !important;
    border: 1px solid var(--border-color);
}

/* ========================================
   10. PROGRESS BARS
   ======================================== */
.progress {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    height: 8px;
    overflow: hidden;
}

.progress-bar {
    background: var(--gradient-cyber);
    box-shadow: 0 0 15px var(--neon-magenta-glow);
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-bar.bg-success {
    background: var(--gradient-green) !important;
    box-shadow: 0 0 15px var(--terminal-green-glow);
}

/* ========================================
   11. ALERTS & NOTIFICATIONS
   ======================================== */
.alert {
    font-family: var(--font-primary);
    border: 1px solid;
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    position: relative;
    overflow: hidden;
}

.alert::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}

.alert-success {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--terminal-green);
    color: var(--terminal-green);
}

.alert-success::before {
    background: var(--terminal-green);
    box-shadow: 0 0 10px var(--terminal-green-glow);
}

.alert-danger {
    background: rgba(255, 0, 64, 0.1);
    border-color: var(--cyber-red);
    color: var(--cyber-red);
}

.alert-danger::before {
    background: var(--cyber-red);
    box-shadow: 0 0 10px var(--cyber-red-glow);
}

.alert-warning {
    background: rgba(255, 255, 0, 0.1);
    border-color: var(--cyber-yellow);
    color: var(--cyber-yellow);
}

.alert-warning::before {
    background: var(--cyber-yellow);
}

.alert-info {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--cyber-blue);
    color: var(--cyber-blue);
}

.alert-info::before {
    background: var(--cyber-blue);
    box-shadow: 0 0 10px var(--cyber-blue-glow);
}

.btn-close {
    filter: invert(1);
}

/* ========================================
   12. MODALS
   ======================================== */
.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg), 0 0 50px var(--neon-magenta-glow);
}

.modal-header {
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-lg);
}

.modal-title {
    font-family: var(--font-display);
    color: var(--neon-magenta);
}

.modal-body {
    padding: var(--space-lg);
}

.modal-footer {
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-lg);
}

.modal-backdrop.show {
    background: rgba(0, 0, 0, 0.8);
}

/* ========================================
   13. DROPDOWNS
   ======================================== */
.dropdown-menu {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--space-sm);
}

.dropdown-item {
    font-family: var(--font-primary);
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.dropdown-item:hover,
.dropdown-item:focus {
    background: var(--bg-tertiary);
    color: var(--neon-magenta);
}

.dropdown-item.active,
.dropdown-item:active {
    background: var(--neon-magenta);
    color: var(--bg-primary);
}

.dropdown-divider {
    border-color: var(--border-color);
}

/* ========================================
   14. ACCORDION
   ======================================== */
.accordion {
    --bs-accordion-bg: var(--bg-card);
    --bs-accordion-border-color: var(--border-color);
}

.accordion-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    margin-bottom: var(--space-sm);
    border-radius: var(--radius-md) !important;
    overflow: hidden;
}

.accordion-button {
    font-family: var(--font-display);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: var(--space-md) var(--space-lg);
    box-shadow: none;
}

.accordion-button:not(.collapsed) {
    background: var(--bg-tertiary);
    color: var(--neon-magenta);
    box-shadow: none;
}

.accordion-button::after {
    filter: invert(1) sepia(1) saturate(5) hue-rotate(280deg);
}

.accordion-button:focus {
    box-shadow: 0 0 0 3px var(--neon-magenta-glow);
}

.accordion-body {
    background: var(--bg-card);
    padding: var(--space-lg);
}

/* ========================================
   15. HERO SECTION
   ======================================== */
.hero-section {
    background: linear-gradient(rgba(0,0,0,0.55), rgba(0,0,0,0.55)), url('/static/img/sahm_bg.png') center center / cover no-repeat;
    padding: var(--space-xxl) 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150%;
    height: 150%;
    transform: translate(-50%, -50%);
    background: radial-gradient(ellipse at center, var(--neon-magenta-glow) 0%, transparent 70%);
    opacity: 0.1;
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.1; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.2; transform: translate(-50%, -50%) scale(1.1); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-lg);
    position: relative;
}

.hero-subtitle {
    font-family: var(--font-primary);
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

/* ========================================
   16. TERMINAL COMPONENTS
   ======================================== */
.terminal-window {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.terminal-header {
    background: var(--bg-tertiary);
    padding: var(--space-sm) var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    border-bottom: 1px solid var(--border-color);
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-dot.red { background: var(--cyber-red); }
.terminal-dot.yellow { background: var(--cyber-yellow); }
.terminal-dot.green { background: var(--terminal-green); }

.terminal-title {
    font-family: var(--font-primary);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-left: auto;
}

.terminal-body {
    padding: var(--space-lg);
    font-family: var(--font-primary);
    font-size: 0.9rem;
    color: var(--terminal-green);
    min-height: 200px;
}

.terminal-line {
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: flex-start;
}

.terminal-prompt {
    color: var(--neon-magenta);
    margin-right: var(--space-sm);
}

.terminal-cursor {
    display: inline-block;
    width: 8px;
    height: 16px;
    background: var(--terminal-green);
    animation: cursor-blink 1s infinite;
    margin-left: 4px;
}

@keyframes cursor-blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ========================================
   17. SIDEBAR
   ======================================== */
.sidebar {
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    min-height: calc(100vh - 76px);
    padding: var(--space-lg);
}

.sidebar-heading {
    font-family: var(--font-display);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

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

.sidebar-nav-item {
    margin-bottom: var(--space-xs);
}

.sidebar-nav-link {
    display: flex;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.sidebar-nav-link:hover {
    background: var(--bg-tertiary);
    color: var(--neon-magenta);
}

.sidebar-nav-link.active {
    background: rgba(255, 0, 255, 0.1);
    color: var(--neon-magenta);
    border-left: 3px solid var(--neon-magenta);
}

.sidebar-nav-link i {
    margin-right: var(--space-sm);
    width: 20px;
    text-align: center;
}

/* ========================================
   18. FOOTER
   ======================================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-xxl) 0 var(--space-lg);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-cyber);
}

.footer-heading {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--neon-magenta);
    margin-bottom: var(--space-md);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--terminal-green);
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin: 0;
}

/* ========================================
   19. ANIMATIONS & EFFECTS
   ======================================== */
/* Glitch Effect */
.glitch {
    position: relative;
    animation: glitch 2s infinite;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.glitch::before {
    left: 2px;
    text-shadow: -2px 0 var(--neon-magenta);
    clip: rect(24px, 550px, 90px, 0);
    animation: glitch-anim 2s infinite linear alternate-reverse;
}

.glitch::after {
    left: -2px;
    text-shadow: -2px 0 var(--terminal-green);
    clip: rect(85px, 550px, 140px, 0);
    animation: glitch-anim2 2s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
    0% { clip: rect(42px, 9999px, 44px, 0); }
    5% { clip: rect(12px, 9999px, 59px, 0); }
    10% { clip: rect(48px, 9999px, 29px, 0); }
    15% { clip: rect(42px, 9999px, 73px, 0); }
    20% { clip: rect(63px, 9999px, 27px, 0); }
    25% { clip: rect(34px, 9999px, 55px, 0); }
    30% { clip: rect(86px, 9999px, 73px, 0); }
    35% { clip: rect(20px, 9999px, 20px, 0); }
    40% { clip: rect(26px, 9999px, 60px, 0); }
    45% { clip: rect(25px, 9999px, 66px, 0); }
    50% { clip: rect(57px, 9999px, 98px, 0); }
    55% { clip: rect(5px, 9999px, 46px, 0); }
    60% { clip: rect(82px, 9999px, 31px, 0); }
    65% { clip: rect(54px, 9999px, 27px, 0); }
    70% { clip: rect(28px, 9999px, 99px, 0); }
    75% { clip: rect(45px, 9999px, 69px, 0); }
    80% { clip: rect(23px, 9999px, 85px, 0); }
    85% { clip: rect(54px, 9999px, 84px, 0); }
    90% { clip: rect(45px, 9999px, 47px, 0); }
    95% { clip: rect(37px, 9999px, 20px, 0); }
    100% { clip: rect(4px, 9999px, 91px, 0); }
}

@keyframes glitch-anim2 {
    0% { clip: rect(65px, 9999px, 100px, 0); }
    5% { clip: rect(52px, 9999px, 74px, 0); }
    10% { clip: rect(79px, 9999px, 85px, 0); }
    15% { clip: rect(75px, 9999px, 5px, 0); }
    20% { clip: rect(67px, 9999px, 61px, 0); }
    25% { clip: rect(14px, 9999px, 79px, 0); }
    30% { clip: rect(1px, 9999px, 66px, 0); }
    35% { clip: rect(86px, 9999px, 30px, 0); }
    40% { clip: rect(23px, 9999px, 98px, 0); }
    45% { clip: rect(85px, 9999px, 72px, 0); }
    50% { clip: rect(71px, 9999px, 75px, 0); }
    55% { clip: rect(2px, 9999px, 48px, 0); }
    60% { clip: rect(30px, 9999px, 16px, 0); }
    65% { clip: rect(59px, 9999px, 50px, 0); }
    70% { clip: rect(41px, 9999px, 62px, 0); }
    75% { clip: rect(2px, 9999px, 82px, 0); }
    80% { clip: rect(47px, 9999px, 73px, 0); }
    85% { clip: rect(3px, 9999px, 27px, 0); }
    90% { clip: rect(26px, 9999px, 55px, 0); }
    95% { clip: rect(42px, 9999px, 97px, 0); }
    100% { clip: rect(38px, 9999px, 49px, 0); }
}

/* Neon Flicker */
.neon-flicker {
    animation: neon-flicker 1.5s infinite alternate;
}

@keyframes neon-flicker {
    0%, 19%, 21%, 23%, 25%, 54%, 56%, 100% {
        text-shadow:
            0 0 4px var(--neon-magenta),
            0 0 11px var(--neon-magenta),
            0 0 19px var(--neon-magenta),
            0 0 40px var(--neon-magenta);
    }
    20%, 24%, 55% {
        text-shadow: none;
    }
}

/* Float Animation */
.float {
    animation: float 3s ease-in-out infinite;
}

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

/* Fade In Up */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    animation: fade-in-up 0.6s ease forwards;
}

@keyframes fade-in-up {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Typing Effect */
.typing {
    overflow: hidden;
    white-space: nowrap;
    animation: typing 3s steps(30, end);
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

/* ========================================
   20. RTL SUPPORT
   ======================================== */
[dir="rtl"] {
    direction: rtl;
    text-align: right;
}

[dir="rtl"] .nav-link::before {
    margin-right: 0;
    margin-left: 4px;
}

[dir="rtl"] .nav-link::after {
    margin-left: 0;
    margin-right: 4px;
}

[dir="rtl"] .sidebar {
    border-right: none;
    border-left: 1px solid var(--border-color);
}

[dir="rtl"] .sidebar-nav-link.active {
    border-left: none;
    border-right: 3px solid var(--neon-magenta);
}

[dir="rtl"] .sidebar-nav-link i {
    margin-right: 0;
    margin-left: var(--space-sm);
}

[dir="rtl"] .stat-card {
    border-left: none;
}

[dir="rtl"] .stat-card.magenta {
    border-right: 4px solid var(--neon-magenta);
}

[dir="rtl"] .stat-card.green {
    border-right: 4px solid var(--terminal-green);
}

[dir="rtl"] .stat-card.blue {
    border-right: 4px solid var(--cyber-blue);
}

[dir="rtl"] .stat-card .stat-icon {
    right: auto;
    left: 15px;
}

[dir="rtl"] .alert::before {
    left: auto;
    right: 0;
}

[dir="rtl"] .terminal-prompt {
    margin-right: 0;
    margin-left: var(--space-sm);
}

[dir="rtl"] .footer-links a:hover {
    padding-left: 0;
    padding-right: 5px;
}

[dir="rtl"] .form-label::before {
    content: ' //';
}

[dir="rtl"] .navbar-brand::before {
    margin-right: 0;
    margin-left: 8px;
    content: '<';
}

/* ========================================
   21. RESPONSIVE STYLES
   ======================================== */
/* Large Screens */
@media (min-width: 1200px) {
    .container {
        max-width: 1320px;
    }
}

/* Medium Screens */
@media (max-width: 991.98px) {
    h1, .hero-title {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .sidebar {
        min-height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        margin-bottom: var(--space-lg);
    }
}

/* Small Screens */
@media (max-width: 767.98px) {
    html {
        font-size: 14px;
    }

    .hero-section {
        padding: var(--space-xl) 0;
    }

    .hero-title {
        font-size: 1.75rem;
    }

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

    .btn {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.85rem;
    }

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

    .table-responsive {
        font-size: 0.85rem;
    }

    .footer {
        text-align: center;
    }

    .footer-links {
        margin-bottom: var(--space-lg);
    }
}

/* Extra Small Screens */
@media (max-width: 575.98px) {
    .navbar-brand {
        font-size: 1.2rem;
    }

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

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

    .terminal-body {
        font-size: 0.8rem;
        padding: var(--space-md);
    }
}

/* ========================================
   22. UTILITY CLASSES
   ======================================== */
.text-neon-magenta { color: var(--neon-magenta) !important; }
.text-terminal-green { color: var(--terminal-green) !important; }
.text-cyber-blue { color: var(--cyber-blue) !important; }
.text-cyber-yellow { color: var(--cyber-yellow) !important; }
.text-cyber-red { color: var(--cyber-red) !important; }

.bg-neon-magenta { background-color: var(--neon-magenta) !important; }
.bg-terminal-green { background-color: var(--terminal-green) !important; }
.bg-cyber-blue { background-color: var(--cyber-blue) !important; }

.border-neon-magenta { border-color: var(--neon-magenta) !important; }
.border-terminal-green { border-color: var(--terminal-green) !important; }
.border-cyber-blue { border-color: var(--cyber-blue) !important; }

.glow-magenta { box-shadow: var(--glow-magenta) !important; }
.glow-green { box-shadow: var(--glow-green) !important; }
.glow-blue { box-shadow: var(--glow-blue) !important; }

.font-mono { font-family: var(--font-primary) !important; }
.font-display { font-family: var(--font-display) !important; }

.text-gradient {
    background: var(--gradient-cyber);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--neon-magenta);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--neon-magenta-light);
}

/* Selection */
::selection {
    background: var(--neon-magenta);
    color: var(--bg-primary);
}

::-moz-selection {
    background: var(--neon-magenta);
    color: var(--bg-primary);
}

/* ========================================
   23. MOBILE-SPECIFIC IMPROVEMENTS
   ======================================== */

/* Minimum 44px touch targets */
@media (max-width: 767.98px) {
    .btn {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .nav-link {
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .dropdown-item {
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    /* Prevent iOS auto-zoom on focused inputs (requires 16px) */
    .form-control,
    .form-select,
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    input[type="search"],
    textarea,
    select {
        font-size: 16px !important;
    }

    /* Disable card lift animation on touch (avoids sticky hover state) */
    .card:hover {
        transform: none;
    }

    /* Notification dropdown width */
    .notification-dropdown {
        width: calc(100vw - 20px) !important;
        max-width: 350px !important;
    }

    /* Lesson sidebar max height on mobile */
    .lesson-sidebar {
        max-height: 60vh;
    }

    /* Footer social links centered on mobile */
    .footer .d-flex.gap-3 {
        justify-content: center;
    }

    /* Truncate long text in navigation buttons */
    .btn .lesson-nav-title {
        display: none;
    }
}

/* Extra small screens */
@media (max-width: 575.98px) {
    /* Notification dropdown: prevent right-side overflow */
    .notification-dropdown.dropdown-menu-end {
        right: -4px !important;
        left: auto !important;
    }

    /* Collapse padding on mobile */
    .hero-section .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    /* Progress bar narrower on very small screens */
    .study-progress-bar {
        width: 80px !important;
    }
}

/* ========================================
   24. PRINT STYLES
   ======================================== */
@media print {
    body {
        background: white !important;
        color: black !important;
    }

    body::before,
    body::after {
        display: none !important;
    }

    .navbar,
    .sidebar,
    .footer {
        display: none !important;
    }

    .card {
        border: 1px solid #ccc !important;
        box-shadow: none !important;
    }

    a {
        color: black !important;
        text-decoration: underline !important;
    }
}

/* ========================================
   ENHANCED TEXT VISIBILITY
   ======================================== */

/* Make all text more visible on black background */
.text-secondary {
    color: #e0e0e0 !important;
}

.text-muted {
    color: #c0c0c0 !important;
}

.card-text {
    color: #e0e0e0 !important;
}

/* Course card improvements */
.course-card .card-title {
    color: #ffffff !important;
}

.course-card .badge {
    font-weight: 600 !important;
}

/* Ensure all small text is visible */
small, .small {
    color: #d0d0d0 !important;
}

/* Button text visibility */
.btn {
    font-weight: 500 !important;
}

.btn-outline-secondary {
    color: #ffffff !important;
    border-color: #666666 !important;
}

.btn-outline-secondary:hover {
    background: #333333 !important;
    color: #ffffff !important;
    border-color: #888888 !important;
}


/* ========================================
   COMPREHENSIVE TEXT VISIBILITY FIX
   ======================================== */

/* All paragraph text */
p {
    color: #e0e0e0 !important;
}

/* All span text */
span:not(.badge):not(.terminal-cursor) {
    color: inherit;
}

/* List items */
li {
    color: #e0e0e0 !important;
}

/* Labels and form text */
label {
    color: #ffffff !important;
}

/* Table text */
td, th {
    color: #e0e0e0 !important;
}

/* Footer text */
footer, footer * {
    color: #c0c0c0 !important;
}

footer h5, footer .footer-heading {
    color: #ffffff !important;
}

/* Navbar text improvements */
.navbar .nav-link {
    color: #e0e0e0 !important;
}

.navbar .nav-link:hover {
    color: #ffffff !important;
}

.dropdown-menu {
    background: #1a1a1a !important;
}

.dropdown-item {
    color: #e0e0e0 !important;
}

.dropdown-item:hover {
    background: #2a2a2a !important;
    color: #ffffff !important;
}

/* Card headers and footers */
.card-header {
    color: #ffffff !important;
}

.card-footer {
    color: #e0e0e0 !important;
}

/* Alert text */
.alert {
    color: #ffffff !important;
}

/* Modal text */
.modal-body, .modal-header, .modal-footer {
    color: #e0e0e0 !important;
}

.modal-title {
    color: #ffffff !important;
}

/* Form placeholders */
::placeholder {
    color: #888888 !important;
    opacity: 1;
}

/* Input text */
input, textarea, select {
    color: #ffffff !important;
}

/* Breadcrumb */
.breadcrumb-item {
    color: #e0e0e0 !important;
}

.breadcrumb-item.active {
    color: #ffffff !important;
}

/* Pagination */
.page-link {
    color: #e0e0e0 !important;
    background: #1a1a1a !important;
    border-color: #333333 !important;
}

.page-link:hover {
    color: #ffffff !important;
    background: #2a2a2a !important;
}

.page-item.active .page-link {
    background: #ff00ff !important;
    border-color: #ff00ff !important;
    color: #000000 !important;
}

/* Stats and numbers */
.stat-value, .stat-number {
    color: #ffffff !important;
}

/* Headings - ensure all are visible */
h1, h2, h3, h4, h5, h6 {
    color: #ffffff !important;
}

/* Links */
a:not(.btn) {
    color: #ff00ff !important;
}

a:not(.btn):hover {
    color: #ff66ff !important;
}

/* Terminal window text */
.terminal-line {
    color: #e0e0e0 !important;
}

.terminal-prompt {
    color: #ff00ff !important;
}

/* Course enrollment count and metadata */
.font-mono {
    color: inherit;
}

/* Price display */
.price-display {
    color: #ffffff !important;
}

/* Ensure Bootstrap text utilities work */
.text-white {
    color: #ffffff !important;
}

.text-light {
    color: #e0e0e0 !important;
}

.text-dark {
    color: #000000 !important;
}