/* styles.css - Professional Trading Platform Design System */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #121824;
    --bg-card: rgba(20, 27, 41, 0.65);
    --bg-card-glow: rgba(0, 230, 118, 0.03);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(0, 230, 118, 0.2);
    
    --color-primary: #00e676; /* Trading Green */
    --color-primary-hover: #00c853;
    --color-secondary: #00b0ff; /* Electric Blue */
    --color-secondary-hover: #0091ea;
    --color-danger: #ff5252; /* Trading Red */
    --color-danger-hover: #ff1744;
    
    --text-main: #f5f6fa;
    --text-muted: #8b9bb4;
    --text-dark: #4f5d75;
    
    --font-sans: 'Outfit', sans-serif;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow-green: 0 0 20px rgba(0, 230, 118, 0.25);
    --shadow-glow-blue: 0 0 20px rgba(0, 176, 255, 0.25);
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
}

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

html, body {
    overflow-x: hidden;
    max-width: 100%;
    width: 100%;
    position: relative;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
}

/* Background Gradients & Glows */
.bg-glow-container {
    position: fixed;
    width: 100%;
    height: 100vh;
    top: 0;
    left: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.bg-glow-1 {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 230, 118, 0.08) 0%, rgba(0, 0, 0, 0) 70%);
    top: -200px;
    right: -100px;
    border-radius: 50%;
    filter: blur(80px);
    animation: pulse-glow 15s infinite alternate;
}

.bg-glow-2 {
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 176, 255, 0.07) 0%, rgba(0, 0, 0, 0) 70%);
    bottom: -100px;
    left: -100px;
    border-radius: 50%;
    filter: blur(80px);
    animation: pulse-glow 12s infinite alternate-reverse;
}

@keyframes pulse-glow {
    0% { transform: scale(1) translate(0, 0); opacity: 0.8; }
    100% { transform: scale(1.2) translate(50px, 50px); opacity: 1; }
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--bg-secondary);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-dark);
}

/* Typography & Layout Utilities */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.02em;
    word-wrap: break-word;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    align-items: center;
}

@media (max-width: 768px) {
    .grid-2 {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

/* Navigation Bar */
header {
    background-color: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 14px 0;
    width: 100%;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.logo {
    display: inline-flex;
    align-items: center;
    font-size: 22px;
    font-weight: 800;
    color: var(--text-main);
    gap: 8px;
    white-space: nowrap;
}

.logo span {
    color: var(--color-primary);
    text-shadow: 0 0 10px rgba(0, 230, 118, 0.3);
}

.mobile-menu-toggle {
    display: none;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 20px;
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.mobile-menu-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(0, 230, 118, 0.1);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 28px;
    align-items: center;
}

.nav-links a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-muted);
    position: relative;
    padding: 4px 0;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text-main);
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--color-primary);
    box-shadow: 0 0 8px var(--color-primary);
    transition: var(--transition-fast);
}

.nav-links a:hover::after, .nav-links a.active::after {
    width: 100%;
}

.btn-nav {
    background-color: transparent;
    border: 1px solid var(--border-color);
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition-fast);
}

@media (max-width: 868px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: calc(100% + 14px);
        left: 0;
        right: 0;
        width: 100%;
        background: rgba(10, 14, 23, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        flex-direction: column;
        gap: 0;
        padding: 12px 16px;
        display: none;
        box-shadow: 0 16px 40px rgba(0, 0, 0, 0.8), 0 0 20px rgba(0, 230, 118, 0.15);
        z-index: 1001;
    }

    .nav-links.mobile-open {
        display: flex;
        animation: fadeInMobileNav 0.25s ease-out forwards;
    }

    .nav-links li {
        width: 100%;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav-links li:last-child {
        border-bottom: none;
    }

    .nav-links a {
        display: block;
        padding: 12px 14px;
        font-size: 15px;
        font-weight: 600;
        width: 100%;
        border-radius: var(--radius-sm);
    }

    .nav-links a:hover, .nav-links a.active {
        background: rgba(0, 230, 118, 0.08);
        color: var(--color-primary);
    }

    .nav-links a::after {
        display: none;
    }

    .nav-links a.btn-nav {
        margin-top: 8px;
        text-align: center;
        background: rgba(0, 230, 118, 0.15);
        border-color: var(--color-primary);
        color: var(--color-primary);
    }
}

@keyframes fadeInMobileNav {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.btn-nav:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    box-shadow: 0 0 10px rgba(0, 230, 118, 0.15);
}

/* Buttons System */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    border: none;
    transition: var(--transition-normal);
}

.btn-primary {
    background-color: var(--color-primary);
    color: #000;
    box-shadow: var(--shadow-glow-green);
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(0, 230, 118, 0.4);
}

.btn-secondary {
    background-color: var(--bg-secondary);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--text-muted);
    background-color: rgba(255, 255, 255, 0.03);
    transform: translateY(-2px);
}

.btn-blue {
    background-color: var(--color-secondary);
    color: #000;
    box-shadow: var(--shadow-glow-blue);
}

.btn-blue:hover {
    background-color: var(--color-secondary-hover);
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(0, 176, 255, 0.4);
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.glass-card:hover {
    border-color: var(--border-glow);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(20, 27, 41, 0.8) 100%);
    box-shadow: var(--shadow-glow-green), var(--shadow-lg);
}

/* Hero Section */
.hero {
    padding: 80px 0 100px;
    position: relative;
}

.hero-content h1 {
    font-size: 56px;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.1;
    background: linear-gradient(135deg, #fff 40%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content h1 span {
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 36px;
    max-width: 500px;
}

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

/* Trading Chart Animation Widget */
.chart-widget {
    height: 350px;
    width: 100%;
    border-radius: var(--radius-md);
    background: rgba(10, 14, 23, 0.6);
    border: 1px solid var(--border-color);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.ticker-badge {
    background: rgba(0, 230, 118, 0.1);
    color: var(--color-primary);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 12px;
}

.ticker-price {
    font-weight: 700;
    font-size: 18px;
}

.chart-canvas-mock {
    flex-grow: 1;
    margin: 20px 0;
    position: relative;
    display: flex;
    align-items: flex-end;
    gap: 8px;
}

.candlestick {
    width: calc(100% / 15);
    height: 60%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

.candle-wick {
    width: 2px;
    background-color: var(--color-primary);
    position: absolute;
    top: 10%;
    bottom: 10%;
}

.candle-body {
    width: 12px;
    border-radius: 2px;
    z-index: 2;
}

.candle-green .candle-body {
    background-color: var(--color-primary);
    box-shadow: 0 0 10px rgba(0, 230, 118, 0.4);
}

.candle-green .candle-wick {
    background-color: var(--color-primary);
}

.candle-red .candle-body {
    background-color: var(--color-danger);
    box-shadow: 0 0 10px rgba(255, 82, 82, 0.4);
}

.candle-red .candle-wick {
    background-color: var(--color-danger);
}

/* Feature Showcase Section */
.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 60px;
    font-size: 16px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 80px;
}

@media (max-width: 992px) {
    .products-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
}

.product-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.product-icon {
    font-size: 40px;
    color: var(--color-primary);
    margin-bottom: 24px;
}

.product-card.course-card .product-icon {
    color: var(--color-secondary);
}

.product-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
}

.product-card p {
    color: var(--text-muted);
    font-size: 15px;
    margin-bottom: 24px;
    flex-grow: 1;
}

.product-price {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.product-price span {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 400;
}

/* Mobile App Section Landing */
.app-section {
    padding: 80px 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.app-benefits {
    list-style: none;
    margin-top: 24px;
    margin-bottom: 32px;
}

.app-benefits li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 15px;
}

.app-benefits li i {
    color: var(--color-primary);
}

.app-badges {
    display: flex;
    gap: 16px;
    align-items: center;
}

.app-badge-btn img {
    height: 48px;
    transition: var(--transition-fast);
}

.app-badge-btn:hover img {
    transform: translateY(-2px);
    filter: drop-shadow(0 4px 10px rgba(0, 230, 118, 0.2));
}

.app-badge-btn.disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.app-badge-btn.disabled:hover img {
    transform: none;
    filter: none;
}

.app-mockup {
    position: relative;
    display: flex;
    justify-content: center;
}

.phone-frame {
    width: 280px;
    height: 560px;
    border: 12px solid #2d3748;
    border-radius: 40px;
    background-color: #0b0f19;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 230, 118, 0.15);
    overflow: hidden;
    position: relative;
}

.phone-screen {
    width: 100%;
    height: 100%;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.phone-notch {
    width: 120px;
    height: 20px;
    background-color: #2d3748;
    border-radius: 0 0 15px 15px;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

/* Individual Pages Styles */
.page-hero {
    padding: 60px 0 40px;
    text-align: center;
}

.page-hero h1 {
    font-size: 44px;
    margin-bottom: 16px;
}

.page-hero p {
    color: var(--text-muted);
    font-size: 16px;
    max-width: 600px;
    margin: 0 auto;
}

.preview-container {
    margin-top: 40px;
}

/* PDF Book Preview */
.book-preview-box {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: 40px;
}

.book-pages-slider {
    background-color: #fff;
    color: #333;
    border-radius: var(--radius-sm);
    height: 500px;
    padding: 48px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow-y: auto;
    font-family: 'Georgia', serif;
}

.book-page-content h2 {
    font-family: var(--font-sans);
    margin-bottom: 24px;
    color: #111;
    font-size: 28px;
}

.book-page-content p {
    margin-bottom: 16px;
    font-size: 15px;
    line-height: 1.8;
}

.book-preview-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
}

/* Course Chapters Accordion */
.syllabus-accordion {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.accordion-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.accordion-header {
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition-fast);
}

.accordion-header:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.accordion-header i {
    transition: var(--transition-fast);
}

.accordion-item.active .accordion-header i {
    transform: rotate(180deg);
    color: var(--color-primary);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal) ease-out;
}

.accordion-item.active .accordion-content {
    max-height: 500px;
    border-top: 1px solid var(--border-color);
}

.lesson-list {
    list-style: none;
    padding: 16px 24px;
}

.lesson-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    font-size: 14px;
}

.lesson-item:last-child {
    border-bottom: none;
}

.lesson-title {
    display: flex;
    align-items: center;
    gap: 12px;
}

.lesson-title i {
    color: var(--text-muted);
}

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

/* Checkout Page */
.checkout-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 32px;
    margin-top: 40px;
}

@media (max-width: 992px) {
    .checkout-grid {
        grid-template-columns: 1fr;
    }
}

.payment-methods {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.payment-tab {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
    border-radius: var(--radius-md);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition-fast);
    font-weight: 500;
    font-size: 14px;
}

.payment-tab:hover {
    border-color: var(--text-muted);
}

.payment-tab.active {
    border-color: var(--color-primary);
    background-color: rgba(0, 230, 118, 0.05);
    color: var(--text-main);
}

.payment-panel {
    display: none;
    animation: fadeIn var(--transition-normal) ease-in-out;
}

.payment-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.form-group label {
    display: block;
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 8px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: var(--text-main);
    font-family: var(--font-sans);
    font-size: 15px;
    transition: var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 10px rgba(0, 230, 118, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* Crypto Gateway UI */
.crypto-selector {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

.crypto-option {
    border: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    padding: 12px;
    border-radius: var(--radius-sm);
    text-align: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.crypto-option:hover {
    border-color: var(--text-muted);
}

.crypto-option.active {
    border-color: var(--color-secondary);
    background-color: rgba(0, 176, 255, 0.05);
}

.crypto-logo {
    font-size: 24px;
    margin-bottom: 4px;
}

.crypto-name {
    font-size: 12px;
    font-weight: 600;
}

.crypto-payment-box {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    position: relative;
}

.crypto-address-wrapper {
    display: flex;
    align-items: center;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    margin: 16px 0;
}

.crypto-address {
    flex-grow: 1;
    font-family: monospace;
    font-size: 12px;
    text-align: left;
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: none;
}

.crypto-address::-webkit-scrollbar {
    display: none;
}

.btn-copy {
    background: none;
    border: none;
    color: var(--color-secondary);
    cursor: pointer;
    font-size: 14px;
    padding: 4px;
}

.crypto-qr-code {
    width: 180px;
    height: 180px;
    background-color: #fff;
    margin: 16px auto;
    border-radius: var(--radius-sm);
    padding: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.crypto-qr-code img {
    max-width: 100%;
}

.crypto-timer {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 12px;
}

.crypto-timer span {
    color: var(--color-danger);
    font-weight: 600;
}

.blockchain-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 16px;
    font-size: 13px;
    color: var(--text-muted);
}

.spinner {
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--color-secondary);
    border-radius: 50%;
    animation: spin 1s infinite linear;
}

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

/* Order Summary Box */
.summary-box {
    position: sticky;
    top: 100px;
}

.summary-title {
    font-size: 18px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
    margin-bottom: 16px;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.summary-total {
    display: flex;
    justify-content: space-between;
    font-size: 18px;
    font-weight: 700;
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
    margin-top: 16px;
}

/* Client Dashboard Page */
.dashboard-grid {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 32px;
    margin-top: 30px;
}

@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.dashboard-sidebar {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.sidebar-btn:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.sidebar-btn.active {
    background-color: rgba(0, 230, 118, 0.08);
    color: var(--color-primary);
    font-weight: 600;
}

.dashboard-pane {
    display: none;
    animation: fadeIn var(--transition-normal) ease;
}

.dashboard-pane.active {
    display: block;
}

/* Course Video Player Custom Design */
.video-player-container {
    background-color: #000;
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
    aspect-ratio: 16 / 9;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.mock-video {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle, #1a2536 0%, #080b12 100%);
    position: relative;
}

.video-overlay-play {
    position: absolute;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: rgba(0, 230, 118, 0.9);
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: 0 0 30px rgba(0, 230, 118, 0.5);
    z-index: 5;
}

.video-overlay-play:hover {
    transform: scale(1.08);
    box-shadow: 0 0 40px rgba(0, 230, 118, 0.7);
}

.video-progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background-color: rgba(255, 255, 255, 0.2);
    cursor: pointer;
}

.video-progress-filled {
    width: 0%;
    height: 100%;
    background-color: var(--color-primary);
    box-shadow: 0 0 10px var(--color-primary);
}

.course-modules-flex {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 24px;
}

@media (max-width: 992px) {
    .course-modules-flex {
        grid-template-columns: 1fr;
    }
}

.video-list-box {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    height: 480px;
    overflow-y: auto;
}

.video-list-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.video-list-item {
    display: flex;
    gap: 12px;
    padding: 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 13px;
    margin-bottom: 8px;
}

.video-list-item:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.video-list-item.active {
    background-color: rgba(0, 176, 255, 0.08);
    border-left: 3px solid var(--color-secondary);
}

.video-thumbnail {
    width: 80px;
    height: 45px;
    background-color: #0b0f19;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.video-item-details {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.video-item-title {
    font-weight: 500;
    color: var(--text-main);
}

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

/* Footer Section */
footer {
    border-top: 1px solid var(--border-color);
    background-color: #070a10;
    padding: 48px 0 24px;
    margin-top: 100px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-col h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--text-main);
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-col ul a {
    color: var(--text-muted);
    font-size: 14px;
}

.footer-col ul a:hover {
    color: var(--color-primary);
}

.footer-about p {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 16px;
    max-width: 260px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
    color: var(--text-muted);
    font-size: 13px;
}

@media (max-width: 768px) {
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

/* Announcement Top Banner (Scarcity / Offer) */
.top-announcement-bar {
    background: linear-gradient(90deg, #00e676 0%, #00b0ff 100%);
    color: #070a10;
    text-align: center;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.2px;
}

.top-announcement-bar a {
    color: #070a10;
    text-decoration: underline;
    margin-left: 6px;
}

/* Testimonials Grid */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.testimonial-card {
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.testimonial-stars {
    color: #ffc107;
    margin-bottom: 14px;
    font-size: 14px;
}

.testimonial-text {
    font-size: 14.5px;
    color: var(--text-main);
    line-height: 1.6;
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
    border-top: 1px solid var(--border-color);
    padding-top: 14px;
}

.testimonial-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: rgba(0, 230, 118, 0.15);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
}

/* Author Section */
.author-box {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 40px;
    align-items: center;
    padding: 36px;
    border-radius: 20px;
}

@media (max-width: 768px) {
    .author-box {
        grid-template-columns: 1fr;
        text-align: center;
    }
}