/* Linux Administration Tutorial - Main Stylesheet */

/* ============================================
   CSS VARIABLES FOR THEME SWITCHING
   ============================================ */
:root {
    /* Light mode colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-tertiary: #edf2f7;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --accent-primary: #667eea;
    --accent-secondary: #764ba2;
    --border-color: #e2e8f0;
    --code-bg: #f7fafc;
    --code-text: #4a5568;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

body.dark-mode {
    /* Dark mode colors */
    --bg-primary: #1a202c;
    --bg-secondary: #2d3748;
    --bg-tertiary: #4a5568;
    --text-primary: #e2e8f0;
    --text-secondary: #cbd5e0;
    --text-muted: #a0aec0;
    --accent-primary: #90cdf4;
    --accent-secondary: #b794f6;
    --border-color: #4a5568;
    --code-bg: #2d3748;
    --code-text: #a0aec0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
}

body.terminal-mode {
    /* Terminal theme colors */
    --bg-primary: #0d1117;
    --bg-secondary: rgba(13, 17, 23, 0.9);
    --bg-tertiary: rgba(48, 54, 61, 0.5);
    --text-primary: #00ff00;
    --text-secondary: #7d8590;
    --text-muted: #6e7681;
    --accent-primary: #00ff00;
    --accent-secondary: #ff6347;
    --border-color: rgba(48, 54, 61, 0.5);
    --code-bg: #0d1117;
    --code-text: #00ff00;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.8);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.8);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.8);
}

/* ============================================
   BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    color: var(--accent-primary);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

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

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-secondary);
}

code {
    background-color: var(--code-bg);
    padding: 0.2em 0.4em;
    border-radius: 0.25rem;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
    color: var(--code-text);
}

pre {
    background-color: var(--code-bg);
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin-bottom: 1.5rem;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
    color: var(--code-text);
    border: 1px solid var(--border-color);
}

pre code {
    background: none;
    padding: 0;
}

/* ============================================
   BREADCRUMB NAVIGATION
   ============================================ */
.breadcrumb {
    background: var(--bg-secondary);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
}

.breadcrumb a {
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.breadcrumb a:hover {
    color: var(--accent-primary);
}

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

/* ============================================
   HEADER STYLES
   ============================================ */
.tutorial-header {
    text-align: center;
    padding: 4rem 0;
    margin-bottom: 3rem;
    border-bottom: 2px solid var(--border-color);
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 0 0 32px 32px;
}

.tutorial-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(
        circle at 30% 20%,
        rgba(78, 205, 196, 0.15) 0%,
        transparent 50%
    ),
    radial-gradient(
        circle at 70% 80%,
        rgba(255, 107, 107, 0.15) 0%,
        transparent 50%
    ),
    radial-gradient(
        circle at 90% 40%,
        rgba(255, 217, 61, 0.15) 0%,
        transparent 50%
    );
    animation: gradientShift 15s ease infinite;
    z-index: 0;
}

.tutorial-header > * {
    position: relative;
    z-index: 1;
}

@keyframes gradientShift {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(-5%, -5%) rotate(120deg); }
    66% { transform: translate(5%, 5%) rotate(240deg); }
}

.tutorial-header h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #ffffff;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    font-weight: 800;
}

.subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* ============================================
   INTRODUCTION SECTION
   ============================================ */
.intro-section {
    margin-bottom: 4rem;
}

.intro-section h2 {
    margin-bottom: 1.5rem;
}

.feature-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    box-shadow:
        0 8px 32px 0 rgba(31, 38, 135, 0.15),
        inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.feature::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
}

.feature:hover {
    transform: translateY(-8px);
    box-shadow:
        0 15px 30px rgba(102, 126, 234, 0.25),
        0 0 15px rgba(102, 126, 234, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

/* ============================================
   MODULES SECTION
   ============================================ */
.modules-section {
    margin-bottom: 4rem;
}

.modules-section h2 {
    margin-bottom: 2rem;
    text-align: center;
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.module-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    box-shadow:
        0 8px 32px 0 rgba(31, 38, 135, 0.15),
        inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.module-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
}

.module-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow:
        0 20px 40px rgba(102, 126, 234, 0.3),
        0 0 20px rgba(102, 126, 234, 0.2);
    border-color: var(--accent-primary);
}

.module-card.featured {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
}

.module-number {
    display: inline-block;
    width: 50px;
    height: 50px;
    line-height: 50px;
    text-align: center;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.module-card h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.module-card p {
    margin-bottom: 1.5rem;
}

.module-topics {
    list-style: none;
    margin-bottom: 1.5rem;
}

.module-topics li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.module-topics li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
}

.module-link {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-decoration: none;
}

.module-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
    color: white;
}

/* ============================================
   LEARNING PATH
   ============================================ */
.learning-path {
    margin-bottom: 4rem;
    padding: 3rem;
    background: var(--bg-secondary);
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
}

.learning-path h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.path-steps {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.path-step {
    flex: 1;
    min-width: 150px;
    text-align: center;
}

.step-number {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border-radius: 50%;
    font-weight: bold;
    margin-bottom: 1rem;
}

.step-content h4 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.step-content p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.path-arrow {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

/* ============================================
   QUICK LINKS
   ============================================ */
.quick-links {
    margin-bottom: 4rem;
}

.quick-links h2 {
    text-align: center;
    margin-bottom: 2rem;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.quick-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    transition: all 0.3s ease;
    text-decoration: none;
}

.quick-link:hover {
    transform: translateY(-3px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-md);
}

.quick-link.featured {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border-color: var(--accent-primary);
}

.link-icon {
    font-size: 2rem;
}

.link-text {
    font-weight: 600;
    color: var(--text-primary);
}

/* ============================================
   THEME TOGGLE BUTTON
   ============================================ */
.theme-toggle {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    z-index: 1001;
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(20deg);
}

/* Move theme toggle above terminal when modal is open */
body:has(.terminal-modal.open) .theme-toggle {
    bottom: calc(60vh + 1rem);
}

/* ============================================
   FOOTER
   ============================================ */
.tutorial-footer {
    text-align: center;
    padding: 2rem 0;
    border-top: 2px solid var(--border-color);
    margin-top: 4rem;
    color: var(--text-muted);
}

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

.tutorial-footer a:hover {
    color: var(--accent-secondary);
}

/* ============================================
   CONTENT PAGE STYLES
   ============================================ */
.content-section {
    margin-bottom: 3rem;
}

.content-section h2 {
    margin-top: 3rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.content-section h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.content-section ul,
.content-section ol {
    margin-left: 2rem;
    margin-bottom: 1.5rem;
}

.content-section li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.content-section strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Command Examples */
.command-example {
    background: var(--bg-secondary);
    border-left: 4px solid var(--accent-primary);
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 0.5rem;
}

.command-example h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

/* Info Boxes */
.info-box {
    background: rgba(102, 126, 234, 0.1);
    border-left: 4px solid var(--accent-primary);
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 0.5rem;
}

.warning-box {
    background: rgba(245, 158, 11, 0.1);
    border-left: 4px solid #f59e0b;
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 0.5rem;
}

.exercise-box {
    background: rgba(34, 197, 94, 0.1);
    border-left: 4px solid #22c55e;
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 0.5rem;
}

/* Navigation Between Pages */
.page-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.nav-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.nav-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
    color: white;
}

.nav-button.prev::before {
    content: '←';
}

.nav-button.next::after {
    content: '→';
}

/* ============================================
   TERMINAL STYLES
   ============================================ */
.terminal-wrapper {
    width: 100%;
    max-width: 900px;
    height: 500px;
    background-color: #1e1e1e;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    margin: 2rem auto;
    border: 1px solid var(--border-color);
}

#terminal {
    flex-grow: 1;
    padding: 10px;
    box-sizing: border-box;
}

.xterm-rows {
    font-family: 'Courier New', Courier, monospace !important;
    font-size: 14px;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }

    .tutorial-header h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    /* Breadcrumb improvements */
    .breadcrumb {
        font-size: 0.85rem;
        flex-wrap: wrap;
        gap: 0.25rem;
    }

    /* Feature grid */
    .feature-highlights {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* Module cards */
    .modules-grid {
        grid-template-columns: 1fr;
    }

    /* Learning path */
    .path-steps {
        flex-direction: column;
    }

    .path-arrow {
        transform: rotate(90deg);
        margin: 0.5rem 0;
    }

    /* Links grid */
    .links-grid {
        grid-template-columns: 1fr;
    }

    /* Page navigation */
    .page-navigation {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-btn {
        width: 100%;
        justify-content: center;
    }

    /* Code blocks - better mobile scrolling */
    pre {
        font-size: 0.85rem;
        padding: 1rem;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    code {
        font-size: 0.85rem;
    }

    .command-example pre {
        max-width: 100%;
    }

    /* Command examples */
    .command-example {
        padding: 1rem;
    }

    /* Info boxes */
    .info-box, .warning-box, .success-box, .tip-box, .exercise-box {
        padding: 1rem;
        font-size: 0.9rem;
    }

    /* Terminal improvements for mobile */
    .terminal-wrapper {
        height: 350px;
    }

    .xterm-rows {
        font-size: 11px;
    }

    /* Terminal modal - better mobile height */
    .terminal-modal {
        height: 50vh;
        max-height: 70vh;
    }

    .terminal-modal.open {
        transform: translateY(0);
    }

    /* Terminal button positioning */
    .terminal-toggle-btn {
        bottom: 4.5rem;
        right: 1rem;
        width: 56px;
        height: 56px;
        font-size: 1.5rem;
    }

    .terminal-toggle-btn.active {
        bottom: calc(50vh + 1rem);
    }

    /* Theme toggle */
    .theme-toggle {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
        bottom: 1rem;
        right: 1rem;
    }

    /* Table responsiveness */
    table {
        font-size: 0.85rem;
    }

    th, td {
        padding: 0.5rem;
    }

    /* Better touch targets */
    a, button, .module-link {
        min-height: 44px;
        min-width: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    /* Module topics list */
    .module-topics {
        font-size: 0.9rem;
    }
}

/* Small mobile devices */
@media (max-width: 480px) {
    .container {
        padding: 0.75rem;
    }

    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.1rem; }

    .tutorial-header h1 {
        font-size: 1.75rem;
    }

    .subtitle {
        font-size: 0.9rem;
    }

    /* Terminal adjustments for very small screens */
    .terminal-modal {
        height: 40vh;
        max-height: 60vh;
    }

    .terminal-toggle-btn {
        bottom: 4rem;
        right: 0.75rem;
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }

    .terminal-toggle-btn.active {
        bottom: calc(40vh + 1rem);
    }

    .xterm-rows {
        font-size: 10px;
    }

    /* Code blocks */
    pre, code {
        font-size: 0.75rem;
    }

    /* Smaller padding for boxes */
    .info-box, .warning-box, .success-box, .tip-box, .exercise-box {
        padding: 0.75rem;
        font-size: 0.85rem;
    }

    /* Module numbers */
    .module-number {
        width: 40px;
        height: 40px;
        line-height: 40px;
        font-size: 1.25rem;
    }
}

/* ============================================
   STICKY TERMINAL BUTTON & MODAL
   ============================================ */
.terminal-toggle-btn {
    position: fixed;
    bottom: 5.5rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
}

.terminal-toggle-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.4);
}

.terminal-toggle-btn.active {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    bottom: calc(60vh + 1rem);
}

/* Terminal Modal */
.terminal-modal {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60vh;
    background: var(--bg-primary);
    border-top: 3px solid var(--accent-primary);
    box-shadow: 0 -5px 30px rgba(0, 0, 0, 0.3);
    z-index: 998;
    transform: translateY(100%);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
    resize: vertical;
    overflow: hidden;
    min-height: 200px;
    max-height: 90vh;
}

.terminal-modal.open {
    transform: translateY(0);
}

/* Resize handle for terminal */
.terminal-resize-handle {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 8px;
    cursor: ns-resize;
    background: transparent;
    z-index: 1000;
}

.terminal-resize-handle:hover {
    background: var(--accent-primary);
    opacity: 0.5;
}

.terminal-resize-handle::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
}

.terminal-modal-header {
    background: var(--bg-secondary);
    padding: 0.25rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
    min-height: 32px;
}

.terminal-modal-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 600;
    line-height: 1.2;
}

.terminal-modal-close {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 0.15rem 0.3rem;
    transition: color 0.3s ease;
    line-height: 1;
}

.terminal-modal-close:hover {
    color: var(--accent-primary);
}

.terminal-modal-body {
    flex: 1;
    overflow: hidden;
    padding: 0;
    background: #1e1e1e;
    position: relative;
}

.terminal-modal .terminal-wrapper {
    width: 100%;
    max-width: none;
    height: 100%;
    margin: 0;
    background: #1e1e1e;
    border-radius: 0;
    overflow: hidden;
}

.terminal-modal #terminal {
    width: 100%;
    height: 100%;
    padding: 0.5rem;
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Responsive adjustments for terminal modal */
@media (max-width: 768px) {
    .terminal-modal {
        height: 70vh;
    }

    .terminal-toggle-btn {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
        bottom: 4.5rem;
        right: 1rem;
    }

    .theme-toggle {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
        bottom: 1rem;
        right: 1rem;
    }

    .terminal-modal-header {
        padding: 0.2rem 0.5rem;
        min-height: 28px;
    }

    .terminal-modal-header h3 {
        font-size: 0.8rem;
    }

    .terminal-modal-close {
        font-size: 1rem;
        padding: 0.1rem 0.2rem;
    }

    .terminal-modal-body {
        padding: 0;
    }

    .terminal-modal #terminal {
        padding: 0.25rem;
    }
}

/* ============================================
   PROGRESS BAR WITH PARTICLES (PHASE 1 ENHANCEMENT)
   ============================================ */
.progress-container {
    position: relative;
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    margin: 20px 0;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #4ecdc4, #44a08d, #06ffa5);
    background-size: 200% 100%;
    animation: progressGradient 3s ease infinite;
    border-radius: 4px;
    width: 0%;
    transition: width 0.8s ease;
    position: relative;
}

.progress-particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: #ffffff;
    border-radius: 50%;
    animation: particleFloat 2s ease-in-out infinite;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

@keyframes particleFloat {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
    50% {
        transform: translateY(-25px) scale(1.3);
        opacity: 0.7;
    }
}

@keyframes progressGradient {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.progress-text {
    text-align: center;
    margin-top: 10px;
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 600;
}

/* ============================================
   THEME SELECTOR (3-THEME SYSTEM)
   ============================================ */
.theme-selector {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
    background: var(--bg-secondary);
    padding: 10px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    z-index: 1002;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.theme-btn {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.theme-btn.active {
    border-color: var(--accent-primary);
    transform: scale(1.15);
    box-shadow: 0 0 15px rgba(102, 126, 234, 0.5);
}

.theme-btn.light {
    background: linear-gradient(45deg, #ecf0f1, #3498db);
}

.theme-btn.dark {
    background: linear-gradient(45deg, #2c3e50, #667eea);
}

.theme-btn.terminal {
    background: linear-gradient(45deg, #0d1117, #00ff00);
}

.theme-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.3);
}

/* ============================================
   LANGUAGE SELECTOR
   ============================================ */
.language-selector {
    position: fixed;
    top: 85px; /* Below theme selector */
    right: 20px;
    display: flex;
    gap: 8px;
    background: var(--bg-secondary);
    padding: 10px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    z-index: 1002;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.lang-btn {
    min-width: 45px;
    height: 35px;
    border-radius: 8px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 13px;
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 0 12px;
}

.lang-btn.active {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    transform: scale(1.05);
    box-shadow: 0 0 15px rgba(102, 126, 234, 0.5);
}

.lang-btn:hover:not(.active) {
    transform: scale(1.05);
    border-color: var(--accent-primary);
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.3);
}

/* RTL (Arabic) Layout Adjustments */
[dir="rtl"] .theme-selector,
html[lang="ar"] .theme-selector {
    right: auto;
    left: 20px;
}

[dir="rtl"] .language-selector,
html[lang="ar"] .language-selector {
    right: auto;
    left: 20px;
}

[dir="rtl"] .terminal-toggle-btn,
html[lang="ar"] .terminal-toggle-btn {
    right: auto;
    left: 2rem;
}

/* ============================================
   RICH TOOLTIPS
   ============================================ */
.tooltip-trigger {
    position: relative;
    cursor: help;
    border-bottom: 2px dotted var(--accent-primary);
    transition: all 0.3s ease;
}

.tooltip-trigger:hover {
    color: var(--accent-primary);
    border-bottom-color: transparent;
}

/* Base tooltip - MINIMAL style for Light Theme */
.rich-tooltip {
    position: absolute;
    bottom: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    width: max-content;
    max-width: 500px;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 16px;
    padding: 0;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    pointer-events: none;
}

/* CLASSIC GOLD style for Terminal Theme */
body.terminal-mode .rich-tooltip {
    background: #fffdf7;
    border: 2px solid #d4af37;
}

/* BLACK & GOLD style for Dark Theme */
body.dark-mode .rich-tooltip {
    background: #0f172a;
    border: 1px solid #d4af37;
    color: #f9fafb;
}

.tooltip-trigger:hover .rich-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.rich-tooltip::before {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 16px;
    height: 16px;
    background: #ffffff;
    border-right: 1px solid #e5e7eb;
    border-bottom: 1px solid #e5e7eb;
    z-index: -1;
}

body.terminal-mode .rich-tooltip::before {
    background: #fffdf7;
    border-right: 2px solid #d4af37;
    border-bottom: 2px solid #d4af37;
}

body.dark-mode .rich-tooltip::before {
    background: #0f172a;
    border-right: 1px solid #d4af37;
    border-bottom: 1px solid #d4af37;
}

/* MINIMAL - Light Theme Header */
.tooltip-header {
    background: transparent;
    padding: 14px 18px;
    border-radius: 16px 16px 0 0;
    border-bottom: none;
}

.tooltip-header h4 {
    margin: 0;
    font-size: 15px;
    font-weight: 700;
    color: #d4af37;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* CLASSIC GOLD - Terminal Theme Header */
body.terminal-mode .tooltip-header {
    background: linear-gradient(90deg, #f6e7b4, #e6c86e);
    color: #1f2933;
}

body.terminal-mode .tooltip-header h4 {
    color: #1f2933;
}

/* BLACK & GOLD - Dark Theme Header */
body.dark-mode .tooltip-header {
    background: linear-gradient(90deg, #2a2200, #d4af37);
    color: #f9fafb;
}

body.dark-mode .tooltip-header h4 {
    color: #f9fafb;
}

.tooltip-content {
    padding: 14px 18px;
    background: transparent;
}

.tooltip-description {
    font-size: 14px;
    line-height: 1.6;
    color: #1f2933;
    margin-bottom: 12px;
}

body.dark-mode .tooltip-description {
    color: #e5e7eb;
}

.tooltip-examples {
    display: grid;
    gap: 12px;
}

/* MINIMAL - Light Theme Cards */
.example-block {
    background: #ffffff;
    border-radius: 12px;
    padding: 10px;
    border: 1px solid #d4af37;
}

.section-label {
    display: block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 6px;
    color: #d4af37;
    text-transform: uppercase;
}

.example-label {
    font-size: 11px;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: #9a7b00;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.example-label::before {
    content: '';
    width: 6px;
    height: 6px;
    background: #d4af37;
    border-radius: 50%;
}

.example-code {
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 12px;
    color: #1f2933;
    background: #faf4df;
    padding: 6px 10px;
    border-radius: 8px;
    margin: 4px 6px 0 0;
    display: inline-block;
    border: none;
    overflow-x: auto;
}

.example-output {
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 11px;
    color: #555;
    padding: 6px 10px;
    background: #f9fafb;
    border-radius: 4px;
    margin-top: 6px;
    border: 1px solid #e5e7eb;
}

/* CLASSIC GOLD - Terminal Theme Cards */
body.terminal-mode .example-block {
    background: #faf4df;
    border: 1px solid #d4af37;
}

body.terminal-mode .example-label {
    color: #8a6d00;
}

body.terminal-mode .example-code {
    background: #fff;
    border: 1px solid #d4af37;
    color: #1f2933;
}

body.terminal-mode .example-output {
    background: #fff;
    border: 1px solid #d4af37;
    color: #555;
}

/* BLACK & GOLD - Dark Theme Cards */
body.dark-mode .example-block {
    background: #020617;
    border: 1px solid #d4af37;
}

body.dark-mode .section-label,
body.dark-mode .example-label {
    color: #e6c86e;
}

body.dark-mode .example-code {
    background: #020617;
    border: 1px solid #d4af37;
    color: #facc15;
}

body.dark-mode .example-output {
    background: #020617;
    border: 1px solid #d4af37;
    color: #e5e7eb;
}

.before-after-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

/* MINIMAL - Light Theme Before/After */
.before-state,
.after-state {
    background: #ffffff;
    border-radius: 12px;
    padding: 10px;
    border: 1px solid #d4af37;
}

.state-label {
    font-size: 11px;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 6px;
}

.before-state .state-label {
    color: #e53e3e;
}

.after-state .state-label {
    color: #38a169;
}

.state-content {
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 11px;
    color: #1f2933;
    line-height: 1.4;
}

/* CLASSIC GOLD - Terminal Theme Before/After */
body.terminal-mode .before-state,
body.terminal-mode .after-state {
    background: #faf4df;
    border: 1px solid #d4af37;
}

body.terminal-mode .state-content {
    color: #1f2933;
}

/* BLACK & GOLD - Dark Theme Before/After */
body.dark-mode .before-state,
body.dark-mode .after-state {
    background: #020617;
    border: 1px solid #d4af37;
}

body.dark-mode .state-content {
    color: #e5e7eb;
}

/* Tooltip positioning variations */
.tooltip-trigger.tooltip-right .rich-tooltip {
    left: calc(100% + 12px);
    right: auto;
    transform: translateX(10px) translateY(-50%);
    top: 50%;
    bottom: auto;
}

.tooltip-trigger.tooltip-right:hover .rich-tooltip {
    transform: translateX(0) translateY(-50%);
}

.tooltip-trigger.tooltip-right .rich-tooltip::before {
    left: -8px;
    top: 50%;
    bottom: auto;
    transform: translateY(-50%) rotate(45deg);
    border: none;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ============================================
   COMMAND CHEAT SHEET PANEL
   ============================================ */
.cheatsheet-panel {
    position: fixed;
    top: -500px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 900px;
    height: 500px;
    background: transparent;
    transition: top 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    overflow: visible;
}

.cheatsheet-panel-content {
    position: relative;
    width: 100%;
    height: 100%;
    background: var(--bg-secondary);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0 0 16px 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    overflow: auto;
    display: flex;
    flex-direction: column;
}

.cheatsheet-toggle {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    background: var(--bg-secondary);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-top: none;
    border-radius: 0 0 16px 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 0;
    font-size: 14px;
    letter-spacing: 1px;
    z-index: 1;
}

.cheatsheet-toggle:hover {
    background: var(--accent-primary);
    color: #ffffff;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.cheatsheet-header {
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(118, 75, 162, 0.2));
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.cheatsheet-header h3 {
    margin: 0;
    color: var(--accent-primary);
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cheatsheet-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.25rem;
    line-height: 1;
    transition: all 0.3s ease;
}

.cheatsheet-close:hover {
    color: var(--accent-secondary);
    transform: rotate(90deg);
}

.cheatsheet-search {
    padding: 1rem 1.5rem;
    background: rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.cheatsheet-search input {
    width: 100%;
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.cheatsheet-search input:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: rgba(0, 0, 0, 0.4);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.cheatsheet-search input::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.search-clear {
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    background: var(--accent-secondary);
    border: none;
    color: #ffffff;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-clear:hover {
    background: #ff6b6b;
    transform: translateY(-50%) scale(1.1);
}

.no-results-message {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.no-results-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.no-results-text {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.no-results-hint {
    font-size: 0.9rem;
    color: var(--text-secondary);
    opacity: 0.8;
}

mark {
    background: rgba(102, 126, 234, 0.4);
    color: #ffffff;
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 600;
}

.cheatsheet-content {
    padding: 1.5rem;
    height: calc(100% - 150px);
    overflow-y: auto;
    overflow-x: hidden;
}

.cheatsheet-resize-handle {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 20px;
    cursor: ns-resize;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.cheatsheet-resize-handle::before {
    content: '';
    width: 60px;
    height: 4px;
    background: var(--accent-primary);
    border-radius: 2px;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

.cheatsheet-resize-handle:hover::before {
    opacity: 1;
}

.cheatsheet-category {
    margin-bottom: 1.5rem;
}

.cheatsheet-category:last-child {
    margin-bottom: 0;
}

.category-title {
    font-size: 0.875rem;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--accent-primary);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.category-title::before {
    content: '';
    width: 4px;
    height: 16px;
    background: var(--accent-primary);
    border-radius: 2px;
}

.commands-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.command-item {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    padding: 0.75rem;
    border-left: 2px solid transparent;
    transition: all 0.3s ease;
}

.command-item:hover {
    background: rgba(102, 126, 234, 0.1);
    border-left-color: var(--accent-primary);
    transform: translateX(4px);
}

.command-name {
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: 0.25rem;
}

.command-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.cheatsheet-content::-webkit-scrollbar {
    width: 8px;
}

.cheatsheet-content::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
}

.cheatsheet-content::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 4px;
}

.cheatsheet-content::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}

/* ============================================
   INTERACTIVE CODE EXAMPLES
   ============================================ */
.code-example-interactive {
    position: relative;
    margin: 1rem 0;
}

.code-example-interactive pre {
    position: relative;
    padding-right: 100px;
}

.code-actions {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    gap: 8px;
    z-index: 10;
}

.code-btn {
    padding: 6px 12px;
    background: var(--accent-primary);
    color: #ffffff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 4px;
}

.code-btn:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

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

.code-btn.copied {
    background: #4ecdc4;
}

.code-btn.copied::after {
    content: '✓';
    margin-left: 4px;
}

.copy-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #4ecdc4;
    color: #ffffff;
    padding: 12px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(78, 205, 196, 0.4);
    z-index: 10000;
    opacity: 0;
    transform: translateY(-20px);
    transition: all 0.3s ease;
    pointer-events: none;
}

.copy-notification.show {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   INTERACTIVE MIND MAP
   ============================================ */
.mind-map-section {
    margin: 4rem 0;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.mind-map-section h2 {
    text-align: center;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mind-map-description {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

#mindMapContainer {
    position: relative;
    width: 100%;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mind-map-node {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mind-map-node:hover {
    transform: scale(1.1);
}

.mind-map-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.mind-map-btn {
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--accent-primary);
    border-radius: 8px;
    color: var(--accent-primary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.mind-map-btn:hover {
    background: var(--accent-primary);
    color: #ffffff;
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.4);
    transform: translateY(-2px);
}

/* ============================================
   KEYBOARD SHORTCUTS PANEL
   ============================================ */
.shortcuts-panel {
    position: fixed;
    top: 50%;
    right: -380px;
    transform: translateY(-50%);
    width: 380px;
    max-height: 80vh;
    background: var(--bg-secondary);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px 0 0 16px;
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.3);
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
    overflow: visible;
}

.shortcuts-panel.active {
    right: 0;
}

.shortcuts-toggle {
    position: absolute;
    left: -48px;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 120px;
    background: var(--bg-secondary);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-right: none;
    border-radius: 16px 0 0 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    writing-mode: vertical-rl;
    font-weight: 600;
    color: var(--accent-primary);
    font-size: 14px;
    letter-spacing: 1px;
}

.shortcuts-toggle:hover {
    background: var(--accent-primary);
    color: #ffffff;
    box-shadow: -5px 0 20px rgba(102, 126, 234, 0.4);
}

.shortcuts-header {
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(118, 75, 162, 0.2));
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.shortcuts-header h3 {
    margin: 0 0 0.5rem 0;
    color: var(--accent-primary);
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.shortcuts-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

.shortcuts-content {
    padding: 1.5rem;
    max-height: calc(80vh - 100px);
    overflow-y: auto;
}

.shortcuts-section {
    margin-bottom: 1.5rem;
}

.shortcuts-section:last-child {
    margin-bottom: 0;
}

.shortcuts-section-title {
    font-size: 0.875rem;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--accent-primary);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.shortcuts-section-title::before {
    content: '';
    width: 4px;
    height: 16px;
    background: var(--accent-primary);
    border-radius: 2px;
}

.shortcut-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    border-left: 2px solid transparent;
    transition: all 0.3s ease;
}

.shortcut-item:hover {
    background: rgba(102, 126, 234, 0.1);
    border-left-color: var(--accent-primary);
    transform: translateX(4px);
}

.shortcut-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    flex: 1;
}

.shortcut-keys {
    display: flex;
    gap: 0.25rem;
    align-items: center;
}

.key {
    padding: 0.25rem 0.5rem;
    background: var(--bg-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-primary);
    min-width: 28px;
    text-align: center;
    box-shadow:
        0 2px 0 rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.key-separator {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin: 0 0.25rem;
}

/* Scrollbar styles for shortcuts panel */
.shortcuts-content::-webkit-scrollbar {
    width: 6px;
}

.shortcuts-content::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

.shortcuts-content::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 3px;
}

.shortcuts-content::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}

/* RTL adjustments for shortcuts panel */
[dir="rtl"] .shortcuts-panel,
html[lang="ar"] .shortcuts-panel {
    right: auto;
    left: -380px;
    border-radius: 0 16px 16px 0;
    box-shadow: 10px 0 40px rgba(0, 0, 0, 0.3);
}

[dir="rtl"] .shortcuts-panel.active,
html[lang="ar"] .shortcuts-panel.active {
    right: auto;
    left: 0;
}

[dir="rtl"] .shortcuts-toggle,
html[lang="ar"] .shortcuts-toggle {
    left: auto;
    right: -48px;
    border-left: none;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0 16px 16px 0;
}

[dir="rtl"] .shortcuts-toggle:hover,
html[lang="ar"] .shortcuts-toggle:hover {
    box-shadow: 5px 0 20px rgba(102, 126, 234, 0.4);
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */
.toast-container {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    pointer-events: none;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--accent-primary);
    border-radius: 0.5rem;
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-lg);
    min-width: 300px;
    max-width: 400px;
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s ease;
    pointer-events: auto;
}

.toast-show {
    opacity: 1;
    transform: translateX(0);
}

.toast-achievement {
    border-left-color: #f59e0b;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), transparent);
}

.toast-success {
    border-left-color: #10b981;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), transparent);
}

.toast-info {
    border-left-color: var(--accent-primary);
}

.toast-title {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.toast-message {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================
   PROGRESS TRACKING
   ============================================ */
.progress-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.progress-bar {
    width: 100px;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 3px;
    transition: width 0.3s ease;
}

.progress-percentage {
    font-weight: 600;
    color: var(--accent-primary);
}

.achievement-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(251, 191, 36, 0.05));
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    margin: 0.25rem;
}

.achievement-icon {
    font-size: 1.25rem;
}

.achievement-locked {
    opacity: 0.4;
    filter: grayscale(100%);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.achievement-card {
    padding: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.achievement-card:not(.achievement-locked):hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

.achievement-card.unlocked {
    border-color: rgba(245, 158, 11, 0.5);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.05), transparent);
}

.achievement-card .achievement-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.achievement-card .achievement-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.achievement-card .achievement-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Mobile adjustments for toasts */
@media (max-width: 768px) {
    .toast-container {
        top: 1rem;
        right: 1rem;
        left: 1rem;
    }

    .toast {
        min-width: unset;
        max-width: unset;
    }
}

/* ============================================
   RTL (RIGHT-TO-LEFT) LAYOUT - ARABIC SUPPORT
   These rules must be at the end to override all other rules including media queries
   ============================================ */

/* Move all fixed UI elements to the left side for RTL languages */
[dir="rtl"] .theme-selector,
html[lang="ar"] .theme-selector {
    right: auto !important;
    left: 20px !important;
}

[dir="rtl"] .language-selector,
html[lang="ar"] .language-selector {
    right: auto !important;
    left: 20px !important;
}

[dir="rtl"] .terminal-toggle-btn,
html[lang="ar"] .terminal-toggle-btn {
    right: auto !important;
    left: 2rem !important;
}

/* RTL adjustments for shortcuts panel */
[dir="rtl"] .shortcuts-panel,
html[lang="ar"] .shortcuts-panel {
    right: auto !important;
    left: -380px !important;
    border-radius: 0 16px 16px 0 !important;
    box-shadow: 10px 0 40px rgba(0, 0, 0, 0.3) !important;
}

[dir="rtl"] .shortcuts-panel.active,
html[lang="ar"] .shortcuts-panel.active {
    right: auto !important;
    left: 0 !important;
}

[dir="rtl"] .shortcuts-toggle,
html[lang="ar"] .shortcuts-toggle {
    left: auto !important;
    right: -48px !important;
    border-left: none !important;
    border-right: 1px solid rgba(255, 255, 255, 0.1) !important;
    border-radius: 0 16px 16px 0 !important;
}

[dir="rtl"] .shortcuts-toggle:hover,
html[lang="ar"] .shortcuts-toggle:hover {
    box-shadow: 5px 0 20px rgba(102, 126, 234, 0.4) !important;
}

/* RTL adjustments for responsive breakpoints */
@media (max-width: 768px) {
    [dir="rtl"] .terminal-toggle-btn,
    html[lang="ar"] .terminal-toggle-btn {
        right: auto !important;
        left: 1rem !important;
    }
}

/* Ensure code blocks are always LTR even in RTL pages */
[dir="rtl"] pre,
[dir="rtl"] code,
html[lang="ar"] pre,
html[lang="ar"] code {
    direction: ltr !important;
    text-align: left !important;
    unicode-bidi: embed !important;
}