/* Memecoin Course Styles - 2025 Enhanced */
:root {
    /* Enhanced Color Palette */
    --primary-color: #6e42e5;
    --primary-light: #8b63ef;
    --primary-dark: #5933c9;
    --secondary-color: #ff6b6b;
    --secondary-light: #ff8a8a;
    --secondary-dark: #ff5252;
    --accent-color: #5af2cc;
    --accent-light: #7df5d4;
    --accent-dark: #45d4b3;
    
    /* Background Colors */
    --dark-bg: #1a1a2e;
    --darker-bg: #0f0f1a;
    --sidebar-bg: #14142b;
    --content-bg: #20203a;
    --light-bg: #f5f5f7;
    --card-bg: rgba(26, 26, 46, 0.6);
    --overlay-bg: rgba(30, 30, 40, 0.8);
    
    /* Text Colors */
    --text-color: #333;
    --light-text: #fff;
    --dim-text: #b8b8d0;
    --muted-text: #9090a8;
    
    /* Interactive Colors */
    --hover-bg: rgba(255, 255, 255, 0.08);
    --active-bg: rgba(110, 66, 229, 0.15);
    --focus-color: rgba(110, 66, 229, 0.4);
    --success-color: #4ade80;
    --warning-color: #fbbf24;
    --error-color: #ef4444;
    
    /* Spacing & Sizing */
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Shadows & Effects */
    --box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    --box-shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.25);
    --glow-shadow: 0 0 32px rgba(110, 66, 229, 0.3);
    --glow-shadow-lg: 0 0 48px rgba(110, 66, 229, 0.4);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    
    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
}

/* Enhanced General Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--light-bg);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    overflow-x: hidden;
    font-weight: var(--font-normal);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.hidden {
    display: none !important;
}

/* Enhanced Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-weight: var(--font-semibold);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    box-shadow: 0 4px 16px rgba(110, 66, 229, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(110, 66, 229, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-light));
    color: white;
    box-shadow: 0 4px 16px rgba(255, 107, 107, 0.3);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary-color));
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 107, 107, 0.4);
}

.btn-accent {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    color: var(--dark-bg);
    box-shadow: 0 4px 16px rgba(90, 242, 204, 0.3);
}

.btn-accent:hover {
    background: linear-gradient(135deg, var(--accent-dark), var(--accent-color));
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(90, 242, 204, 0.4);
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.05);
    color: var(--light-text);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

/* Enhanced Animation Classes */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

@keyframes shimmer {
    0% {
        background-position: -200px 0;
    }
    100% {
        background-position: calc(200px + 100%) 0;
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fadeInLeft {
    animation: fadeInLeft 0.6s ease-out;
}

.course-screen {
    min-height: 100vh;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Enhanced Authentication Screen */
.auth-dark-mode {
    background: linear-gradient(135deg, var(--darker-bg) 0%, #0a0a15 100%);
    color: var(--light-text);
}

.auth-dark-mode .auth-container {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    max-width: 480px;
    width: 90%;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--glow-shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.08);
    overflow: hidden;
    position: relative;
    margin: 0 auto;
    text-align: center;
}

.auth-content {
    flex: 1;
    padding: var(--spacing-xxl) var(--spacing-xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 2;
    width: 100%;
    box-sizing: border-box;
}

.auth-header {
    margin-bottom: var(--spacing-xl);
}

.auth-header h1 {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--spacing-sm);
    color: var(--light-text);
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--light-text), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-header p {
    font-size: var(--text-lg);
    color: var(--dim-text);
    margin-bottom: 0;
    font-weight: var(--font-medium);
}

.auth-dark-mode .input-group {
    display: flex;
    flex-direction: column;
    margin: var(--spacing-sm) 0 var(--spacing-lg);
    width: 100%;
    max-width: 350px;
}

.auth-dark-mode .input-group input {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    color: var(--light-text);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    margin-bottom: var(--spacing-md);
    transition: var(--transition);
    text-align: center;
    backdrop-filter: blur(10px);
}

.auth-dark-mode .input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--focus-color);
    background: rgba(255, 255, 255, 0.08);
}

.auth-dark-mode .input-group input::placeholder {
    color: rgba(255, 255, 255, 0.4);
    font-weight: var(--font-normal);
}

.auth-dark-mode .input-group button {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: 0 4px 16px rgba(110, 66, 229, 0.3);
    position: relative;
    overflow: hidden;
}

.auth-dark-mode .input-group button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

.auth-dark-mode .input-group button:hover::before {
    left: 100%;
}

.auth-dark-mode .input-group button:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(110, 66, 229, 0.4);
}

.btn-arrow {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.auth-dark-mode .input-group button:hover .btn-arrow {
    transform: translateX(4px);
}

.auth-dark-mode .error-message {
    color: var(--error-color);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    min-height: 20px;
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: rgba(239, 68, 68, 0.1);
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Enhanced Decorative Elements */
.auth-decoration,
.welcome-decoration,
.sidebar-decoration,
.content-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    pointer-events: none;
}

.blockchain-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(110, 66, 229, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(110, 66, 229, 0.08) 1px, transparent 1px);
    background-size: 24px 24px;
    background-position: center center;
    opacity: 0.6;
    animation: pulse 4s ease-in-out infinite;
}

.blockchain-grid:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(110, 66, 229, 0.15) 0%, rgba(26, 26, 46, 0) 70%);
}

/* Floating particles animation */
@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-10px) rotate(120deg); }
    66% { transform: translateY(5px) rotate(240deg); }
}

.blockchain-grid:after {
    content: '';
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-color);
    border-radius: 50%;
    top: 20%;
    left: 30%;
    animation: float 6s ease-in-out infinite;
    box-shadow: 
        60px 80px 0 -2px var(--primary-light),
        120px 20px 0 -1px var(--secondary-light),
        200px 60px 0 -2px var(--accent-light);
}

/* Enhanced Welcome Screen */
.welcome-dark-mode {
    background: linear-gradient(135deg, var(--darker-bg) 0%, #0a0a15 50%, var(--dark-bg) 100%);
    color: var(--light-text);
    min-height: 100vh;
}

.welcome-dark-mode .welcome-container {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    max-width: 950px;
    width: 90%;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--glow-shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.08);
    overflow: hidden;
    position: relative;
    margin: 0 auto;
    padding: 0;
    animation: fadeInUp 0.6s ease-out;
}

.welcome-image {
    width: 100%;
    padding: var(--spacing-xxl) var(--spacing-xxl) 0;
    display: flex;
    justify-content: center;
    position: relative;
    z-index: 2;
}

.memecoin-image {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 16px 40px rgba(0, 0, 0, 0.6));
    transform: translateY(-20px);
    opacity: 0.95;
    transition: var(--transition-slow);
    border-radius: var(--border-radius);
}

.memecoin-image:hover {
    transform: translateY(-24px) scale(1.02);
    filter: drop-shadow(0 20px 50px rgba(110, 66, 229, 0.3));
}

.welcome-content {
    padding: var(--spacing-xl) var(--spacing-xxl) var(--spacing-xxl);
    text-align: center;
    position: relative;
    z-index: 2;
}

.welcome-content h1 {
    font-size: var(--text-4xl);
    font-weight: var(--font-extrabold);
    margin-bottom: var(--spacing-lg);
    color: var(--light-text);
    letter-spacing: -0.5px;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--light-text) 0%, var(--primary-light) 50%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-content h1 span {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    position: relative;
}

.welcome-content h1 span::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
    opacity: 0.6;
}

.welcome-content p {
    font-size: var(--text-lg);
    font-weight: var(--font-medium);
    color: var(--dim-text);
    margin-bottom: var(--spacing-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.welcome-content .primary-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border: none;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--border-radius);
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: 0 6px 20px rgba(110, 66, 229, 0.4);
    position: relative;
    overflow: hidden;
}

.welcome-content .primary-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

.welcome-content .primary-btn:hover::before {
    left: 100%;
}

.welcome-content .primary-btn:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(110, 66, 229, 0.5);
}

.welcome-content .primary-btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* Enhanced Course Content Screen */
.course-dark-mode {
    background: linear-gradient(135deg, var(--darker-bg) 0%, #0a0a15 100%);
    color: var(--light-text);
    display: flex;
    flex-direction: row;
    padding: 0;
    height: 100vh;
    overflow: hidden;
    justify-content: flex-start;
    align-items: stretch;
}

/* Enhanced Mobile Header */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-md);
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    align-items: center;
    z-index: 50;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.mobile-header h2 {
    margin: 0;
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    text-align: center;
    flex: 1;
    background: linear-gradient(135deg, var(--light-text), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.menu-toggle {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--light-text);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.menu-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.menu-toggle svg {
    width: 24px;
    height: 24px;
    transition: var(--transition);
}

.menu-toggle:hover svg {
    transform: scale(1.1);
}

/* Enhanced Sidebar Navigation */
.course-dark-mode .course-sidebar {
    width: 340px;
    background: var(--sidebar-bg);
    color: var(--light-text);
    height: 100%;
    overflow-y: auto;
    transition: var(--transition);
    position: relative;
    flex-shrink: 0;
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    z-index: 40;
    backdrop-filter: blur(10px);
}

.course-dark-mode .sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 2;
    background: rgba(20, 20, 43, 0.8);
    backdrop-filter: blur(20px);
}

.course-dark-mode .sidebar-header h2 {
    margin: 0;
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    background: linear-gradient(135deg, var(--light-text), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-close {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--light-text);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    display: none;
    transition: var(--transition);
}

.sidebar-close:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.course-dark-mode .sidebar-content {
    padding: var(--spacing-md) 0;
    position: relative;
    z-index: 2;
}

.course-dark-mode #lesson-list,
.course-dark-mode #ema-lesson-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.course-dark-mode #lesson-list li,
.course-dark-mode #ema-lesson-list li {
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-left: 4px solid transparent;
    position: relative;
    margin: 2px 0;
}

.course-dark-mode #lesson-list li::before,
.course-dark-mode #ema-lesson-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent, rgba(110, 66, 229, 0.05));
    opacity: 0;
    transition: var(--transition);
}

.course-dark-mode #lesson-list li:hover::before,
.course-dark-mode #ema-lesson-list li:hover::before {
    opacity: 1;
}

.course-dark-mode #lesson-list li:hover,
.course-dark-mode #ema-lesson-list li:hover {
    background: var(--hover-bg);
    transform: translateX(4px);
}

.course-dark-mode #lesson-list li.active,
.course-dark-mode #ema-lesson-list li.active {
    background: var(--active-bg);
    border-left: 4px solid var(--primary-color);
    box-shadow: inset 0 0 20px rgba(110, 66, 229, 0.1);
}

.course-dark-mode #lesson-list li.active::before,
.course-dark-mode #ema-lesson-list li.active::before {
    opacity: 1;
    background: linear-gradient(135deg, rgba(110, 66, 229, 0.1), transparent);
}

.lesson-number {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--primary-color);
    opacity: 0.7;
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(110, 66, 229, 0.1);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.course-dark-mode #lesson-list li:hover .lesson-number,
.course-dark-mode #ema-lesson-list li:hover .lesson-number {
    opacity: 0.9;
    background: rgba(110, 66, 229, 0.15);
    transform: scale(1.05);
}

.course-dark-mode #lesson-list li.active .lesson-number,
.course-dark-mode #ema-lesson-list li.active .lesson-number {
    opacity: 1;
    background: rgba(110, 66, 229, 0.2);
    color: var(--primary-light);
}

.lesson-info {
    flex: 1;
}

.lesson-title {
    display: block;
    font-weight: var(--font-medium);
    font-size: var(--text-sm);
    line-height: 1.4;
    color: var(--dim-text);
    transition: var(--transition);
}

.course-dark-mode #lesson-list li:hover .lesson-title {
    color: var(--light-text);
}

.course-dark-mode #lesson-list li.active .lesson-title {
    color: var(--light-text);
    font-weight: var(--font-semibold);
}

.sidebar-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

/* Enhanced Main Content Area */
.course-dark-mode .course-main-content {
    flex: 1;
    height: 100%;
    overflow-y: auto;
    position: relative;
    background: var(--content-bg);
}

.content-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    position: relative;
    z-index: 2;
}

.video-section {
    margin-bottom: var(--spacing-xxl);
}

.course-dark-mode #video-container {
    width: 100%;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    background: #000;
    box-shadow: var(--glow-shadow-lg);
    position: relative;
    border: 2px solid rgba(110, 66, 229, 0.1);
    transition: var(--transition);
}

.course-dark-mode #video-container:hover {
    border-color: rgba(110, 66, 229, 0.3);
    box-shadow: 0 0 40px rgba(110, 66, 229, 0.2);
}

.course-dark-mode #lesson-video {
    width: 100%;
    max-height: 70vh;
    display: block;
    transition: var(--transition);
}

.lesson-section {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    padding: var(--spacing-xxl);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.08);
    position: relative;
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.course-dark-mode #lesson-title {
    color: var(--light-text);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    position: relative;
    background: linear-gradient(135deg, var(--light-text), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    line-height: 1.2;
    letter-spacing: -0.025em;
}



.lesson-description {
    color: var(--dim-text);
    font-size: var(--text-lg);
    font-weight: var(--font-medium);
    line-height: 1.8;
    text-align: center;
    margin-bottom: var(--spacing-xxl);
    max-width: 600px;
    padding: 0 var(--spacing-md);
}

.content-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

/* Mobile Responsive Styles */
.mobile-only {
    display: none;
}

/* Tablet responsiveness */
@media (max-width: 1024px) {
    .course-dark-mode .course-sidebar {
        width: 300px;
    }
    
    .content-container {
        padding: var(--spacing-lg);
    }
    
    .lesson-section {
        padding: var(--spacing-xl);
        max-width: 700px;
    }
    
    .course-dark-mode #lesson-title {
        font-size: var(--text-2xl);
    }
}

/* Comprehensive Mobile Responsiveness */
@media (max-width: 768px) {
    /* Course layout */
    .course-dark-mode {
        flex-direction: column;
    }
    
    .mobile-header {
        display: flex;
    }
    
    /* Enhanced sidebar for mobile */
    .course-dark-mode .course-sidebar {
        position: fixed;
        left: -100%;
        top: 0;
        bottom: 0;
        width: min(320px, 90vw);
        z-index: 100;
        box-shadow: 5px 0 25px rgba(0, 0, 0, 0.3);
        transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    .course-dark-mode .course-sidebar.active {
        left: 0;
    }
    
    .course-dark-mode .sidebar-header {
        padding-top: calc(60px + var(--spacing-md));
    }
    
    .mobile-only {
        display: block;
    }
    
    .sidebar-close {
        display: block;
    }
    
    /* Main content adjustments */
    .course-dark-mode .course-main-content {
        padding-top: 70px;
        min-height: 100vh;
    }
    
    .content-container {
        padding: var(--spacing-md);
    }
    
    .video-section {
        margin-bottom: var(--spacing-xl);
    }
    
    .course-dark-mode #video-container {
        border-radius: var(--border-radius);
    }
    
    /* Enhanced lesson section for mobile */
    .lesson-section {
        padding: var(--spacing-lg);
        margin: var(--spacing-sm);
        max-width: none;
        border-radius: var(--border-radius);
    }
    
    .course-dark-mode #lesson-title {
        font-size: var(--text-xl);
        margin-bottom: var(--spacing-lg);
        line-height: 1.3;
    }
    
    .course-dark-mode #lesson-title::after {
        bottom: -var(--spacing-md);
        width: 60px;
        height: 3px;
    }
    
    .lesson-description {
        font-size: var(--text-base);
        margin-bottom: var(--spacing-lg);
        padding: 0;
        line-height: 1.7;
    }
    
    /* Welcome screen mobile improvements */
    .welcome-content {
        padding: var(--spacing-lg);
    }
    
    .welcome-content h1 {
        font-size: var(--text-2xl);
        line-height: 1.3;
    }
    
    .welcome-image {
        padding: var(--spacing-xl) var(--spacing-lg) 0;
    }
    
    .memecoin-image {
        transform: translateY(-10px);
        border-radius: var(--border-radius-sm);
    }
    
    /* Auth screen mobile improvements */
    .auth-content {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .auth-header h1 {
        font-size: var(--text-3xl);
    }
    
    .auth-dark-mode .input-group {
        max-width: 100%;
    }
    
    .auth-dark-mode .input-group input {
        font-size: var(--text-lg);
        padding: var(--spacing-lg);
    }
    
    .auth-dark-mode .input-group button {
        font-size: var(--text-lg);
        padding: var(--spacing-lg);
    }
    
    /* Touch-friendly interactions */
    .course-dark-mode #lesson-list li,
    .course-dark-mode #ema-lesson-list li {
        padding: var(--spacing-lg);
        min-height: 60px;
    }
    
    .lesson-number {
        min-width: 45px;
        height: 45px;
        font-size: var(--text-base);
    }
    
    .lesson-title {
        font-size: var(--text-base);
        line-height: 1.5;
    }
    
    /* Mobile compatibility note styling */
    .mobile-compatibility-note {
        margin: var(--spacing-md) 0;
        padding: var(--spacing-md);
        font-size: var(--text-sm);
        border-radius: var(--border-radius);
    }
    
    /* Ensure touch targets are adequate */
    .menu-toggle,
    .sidebar-close {
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Better text selection on mobile */
    .lesson-description,
    .course-dark-mode #lesson-title {
        -webkit-user-select: text;
                 user-select: text;
     }
 }

/* Extra Small Devices (phones in portrait) */
@media (max-width: 480px) {
    .auth-dark-mode .auth-container {
        max-width: 95%;
        margin: var(--spacing-md);
    }
    
    .welcome-dark-mode .welcome-container {
        max-width: 95%;
        margin: var(--spacing-md);
    }
    
    .course-dark-mode .course-sidebar {
        width: min(280px, 85vw);
    }
    
    .content-container {
        padding: var(--spacing-sm);
    }
    
    .lesson-section {
        padding: var(--spacing-md);
        margin: var(--spacing-xs);
    }
    
    .course-dark-mode #lesson-title {
        font-size: var(--text-lg);
    }
    
    .lesson-description {
        font-size: var(--text-sm);
    }
    
    .bot-button {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--text-xs);
        margin: var(--spacing-xs);
    }
    
    .verified-label {
        font-size: 10px;
        padding: 2px var(--spacing-xs);
    }
    
    .lesson-description.mobile-view .bot-button {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--text-sm);
    }
}

/* Enhanced Ad Styles - 2025 (No Animation) */
.ad-link {
    color: var(--secondary-color);
    font-weight: var(--font-bold);
    text-decoration: none;
    position: relative;
    transition: var(--transition);
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    background: rgba(255, 107, 107, 0.1);
    border: 1px solid rgba(255, 107, 107, 0.2);
}

.ad-link:hover {
    color: var(--secondary-light);
    background: rgba(255, 107, 107, 0.15);
    border-color: rgba(255, 107, 107, 0.3);
    box-shadow: 0 2px 8px rgba(255, 107, 107, 0.2);
}

/* Enhanced Mobile compatibility note */
.mobile-compatibility-note {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(251, 191, 36, 0.1);
    border: 1px solid rgba(251, 191, 36, 0.2);
    border-left: 4px solid var(--warning-color);
    color: var(--light-text);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    border-radius: var(--border-radius-sm);
    text-align: center;
    backdrop-filter: blur(10px);
}

.mobile-compatibility-note::before {
    content: '⚠️';
    margin-right: var(--spacing-sm);
    font-size: var(--text-base);
}

/* Enhanced Bot button styles - Compact Version */
.bot-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-light));
    color: white;
    font-weight: var(--font-semibold);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-md);
    margin: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    text-align: center;
    font-size: var(--text-sm);
    box-shadow: 0 2px 8px rgba(255, 107, 107, 0.25);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 107, 107, 0.3);
    white-space: nowrap;
    vertical-align: middle;
}

.bot-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.3s;
}

.bot-button:hover::before {
    left: 100%;
}

.bot-button:hover {
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary-color));
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3);
    border-color: rgba(255, 107, 107, 0.4);
    color: white;
    text-decoration: none;
}

.verified-label {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    margin-left: var(--spacing-sm);
    position: relative;
    box-shadow: 0 2px 8px rgba(110, 66, 229, 0.3);
    border: 1px solid rgba(110, 66, 229, 0.2);
    transition: var(--transition);
    vertical-align: middle;
}

.verified-label::before {
    content: '✓';
    margin-right: var(--spacing-xs);
    font-weight: var(--font-bold);
}

.verified-label:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(110, 66, 229, 0.4);
}

/* EMA 2.0 Golden CTA button - fits design */
.btn-ema {
    background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 30%, #fde047 60%, #f59e0b 100%);
    background-size: 200% 200%;
    animation: emaGradient 6s ease infinite;
    color: #1a1a2e;
    border: 1px solid rgba(250, 204, 21, 0.6);
    box-shadow: 0 6px 18px rgba(250, 204, 21, 0.28), 0 0 24px rgba(250, 204, 21, 0.18);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: var(--font-semibold);
}

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

.btn-ema::before {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
}

.btn-ema:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(250, 204, 21, 0.4), 0 0 36px rgba(250, 204, 21, 0.25);
    filter: brightness(1.02);
}

.btn-ema:active {
    transform: translateY(0);
    box-shadow: 0 4px 12px rgba(250, 204, 21, 0.3);
}

.btn-ema .btn-arrow {
    transition: transform 0.25s ease;
}

.btn-ema:hover .btn-arrow {
    transform: translateX(4px);
}

.ema-cta { 
    padding: var(--spacing-md) var(--spacing-lg);
}

/* Lesson description ad styling for desktop */
.lesson-description p {
    text-align: center;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 5px;
}

/* Enhanced Mobile Compatibility */
@media (max-width: 768px) {
    /* Lesson description improvements */
    .lesson-description p {
        line-height: 1.8;
        margin-bottom: var(--spacing-xl);
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: var(--spacing-md);
        padding: 0 var(--spacing-sm);
    }
    
    .ad-link {
        display: inline-block;
        margin: var(--spacing-xs) 0;
        font-size: var(--text-base);
        padding: var(--spacing-xs) var(--spacing-sm);
        order: 1;
    }
    
    .bot-button {
        display: inline-block;
        width: auto;
        max-width: fit-content;
        margin: var(--spacing-sm) auto;
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--text-base);
        order: 2;
    }
    
    .verified-label {
        display: inline-block;
        margin-left: 0;
        margin-top: var(--spacing-sm);
        font-size: var(--text-xs);
        width: fit-content;
        padding: var(--spacing-xs) var(--spacing-sm);
        order: 3;
    }
    
    /* Enhanced text wrapping */
    .lesson-description {
        word-wrap: break-word;
        hyphens: auto;
        overflow-wrap: break-word;
    }
    
    /* Mobile-specific content layout */
    .lesson-description.mobile-view p {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }
    
    .lesson-description.mobile-view .ad-link {
        margin: var(--spacing-sm) 0;
        font-size: var(--text-base);
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .lesson-description.mobile-view .bot-button {
        margin: var(--spacing-sm) 0;
        padding: var(--spacing-sm) var(--spacing-lg);
    }
    
    .lesson-description.mobile-view .verified-label {
        margin: var(--spacing-sm) 0 0 0;
    }
}