/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Patriotic Power Colors */
    --american-red: #DC143C;
    --american-blue: #002868;
    --american-white: #FFFFFF;
    --deep-navy: #0A1628;
    --metallic-silver: #C0C0C0;
    --neon-blue: #00BFFF;
    --neon-red: #FF073A;
    --gold-accent: #FFD700;
    
    /* Gradients */
    --metallic-gradient: linear-gradient(135deg, #C0C0C0 0%, #E6E6FA 50%, #C0C0C0 100%);
    --patriotic-gradient: linear-gradient(135deg, var(--american-red) 0%, var(--american-white) 50%, var(--american-blue) 100%);
    --power-gradient: linear-gradient(135deg, var(--deep-navy) 0%, var(--american-blue) 100%);
    
    /* Typography */
    --font-futuristic: 'Orbitron', monospace;
    --font-bold: 'Rajdhani', sans-serif;
    
    /* Shadows and Glows */
    --neon-glow-blue: 0 0 20px var(--neon-blue), 0 0 40px var(--neon-blue), 0 0 60px var(--neon-blue);
    --neon-glow-red: 0 0 20px var(--neon-red), 0 0 40px var(--neon-red), 0 0 60px var(--neon-red);
    --metallic-shadow: 0 8px 32px rgba(192, 192, 192, 0.3);
    --power-shadow: 0 10px 40px rgba(0, 40, 104, 0.4);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
}

body {
    font-family: var(--font-bold);
    line-height: 1.6;
    color: var(--american-white);
    background: var(--deep-navy);
    overflow-x: hidden;
}

/* Animated American Flag Background */
.flag-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.15;
}

.flag-stripes {
    position: absolute;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        var(--american-red) 0px,
        var(--american-red) 40px,
        var(--american-white) 40px,
        var(--american-white) 80px
    );
    animation: waveFlag 20s ease-in-out infinite;
}

.flag-stars {
    position: absolute;
    width: 40%;
    height: 50%;
    background: var(--american-blue);
    background-image: 
        radial-gradient(circle at 8% 15%, var(--american-white) 2px, transparent 2px),
        radial-gradient(circle at 25% 15%, var(--american-white) 2px, transparent 2px),
        radial-gradient(circle at 42% 15%, var(--american-white) 2px, transparent 2px),
        radial-gradient(circle at 58% 15%, var(--american-white) 2px, transparent 2px),
        radial-gradient(circle at 75% 15%, var(--american-white) 2px, transparent 2px),
        radial-gradient(circle at 92% 15%, var(--american-white) 2px, transparent 2px);
    background-size: 100% 20%;
    background-repeat: repeat-y;
}

.circuit-overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="circuit" x="0" y="0" width="20" height="20" patternUnits="userSpaceOnUse"><path d="M0 10h20M10 0v20M5 5h10v10H5z" stroke="%2300BFFF" stroke-width="0.5" fill="none" opacity="0.3"/></pattern></defs><rect width="100" height="100" fill="url(%23circuit)"/></svg>') repeat;
    animation: circuitFlow 15s linear infinite;
}

@keyframes waveFlag {
    0%, 100% { transform: translateX(0) skewX(0deg); }
    25% { transform: translateX(10px) skewX(2deg); }
    50% { transform: translateX(0) skewX(0deg); }
    75% { transform: translateX(-10px) skewX(-2deg); }
}

@keyframes circuitFlow {
    0% { background-position: 0 0; }
    100% { background-position: 100px 100px; }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 2px solid var(--neon-blue);
    z-index: 1000;
    box-shadow: var(--power-shadow);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.brand-icon {
    font-size: 2rem;
    animation: pulse 2s ease-in-out infinite;
}

.brand-text {
    font-family: var(--font-futuristic);
    font-size: 1.4rem;
    font-weight: 900;
    background: var(--patriotic-gradient);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: var(--neon-glow-blue);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
}

.nav-link {
    text-decoration: none;
    color: var(--american-white);
    font-weight: 600;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    position: relative;
    padding: var(--space-sm) 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--neon-blue);
    text-shadow: var(--neon-glow-blue);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--neon-blue);
    box-shadow: var(--neon-glow-blue);
    transition: width 0.3s ease;
}

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

.nav-actions {
    display: flex;
    gap: var(--space-md);
}

.btn-primary,
.btn-secondary {
    padding: var(--space-md) var(--space-xl);
    border: none;
    border-radius: 8px;
    font-family: var(--font-bold);
    font-weight: 700;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--american-red);
    color: var(--american-white);
    border: 2px solid var(--american-red);
}

.btn-secondary {
    background: transparent;
    color: var(--neon-blue);
    border: 2px solid var(--neon-blue);
}

.btn-primary.glow {
    box-shadow: var(--neon-glow-red);
}

.btn-secondary.glow {
    box-shadow: var(--neon-glow-blue);
}

.btn-primary:hover {
    background: var(--neon-red);
    border-color: var(--neon-red);
    transform: translateY(-2px);
    box-shadow: var(--neon-glow-red);
}

.btn-secondary:hover {
    background: var(--neon-blue);
    color: var(--american-white);
    transform: translateY(-2px);
}

.btn-primary.large,
.btn-secondary.large {
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1.2rem;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.mobile-toggle span {
    width: 25px;
    height: 3px;
    background: var(--american-white);
    transition: 0.3s;
    border-radius: 2px;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px var(--space-lg) var(--space-3xl);
    position: relative;
}

.hero-content {
    max-width: 1400px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero-text {
    z-index: 2;
}

.hero-title {
    font-family: var(--font-futuristic);
    font-size: 4.5rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.title-main {
    display: block;
    background: var(--patriotic-gradient);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: var(--neon-glow-red);
    animation: titleGlow 3s ease-in-out infinite alternate;
}

.title-sub {
    display: block;
    color: var(--neon-blue);
    text-shadow: var(--neon-glow-blue);
    margin-top: var(--space-md);
}

@keyframes titleGlow {
    0% { filter: brightness(1); }
    100% { filter: brightness(1.2); }
}

.hero-subtitle {
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--metallic-silver);
    margin-bottom: var(--space-md);
    line-height: 1.5;
}

.hero-author {
    font-size: 1.2rem;
    color: var(--gold-accent);
    font-weight: 600;
    margin-bottom: var(--space-2xl);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.stat-item {
    background: rgba(0, 40, 104, 0.3);
    border: 1px solid var(--neon-blue);
    border-radius: 12px;
    padding: var(--space-lg);
    text-align: center;
    box-shadow: var(--neon-glow-blue);
    backdrop-filter: blur(10px);
}

.stat-comparison {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
}

.stat-us,
.stat-china {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.stat-us .flag,
.stat-china .flag {
    font-size: 1.5rem;
}

.stat-us .amount {
    color: var(--neon-blue);
    font-weight: 700;
    font-size: 1.1rem;
}

.stat-china .amount {
    color: var(--neon-red);
    font-weight: 700;
    font-size: 1.1rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--metallic-silver);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero-actions {
    display: flex;
    gap: var(--space-xl);
    margin-top: var(--space-2xl);
}

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

.hero-book {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.book-showcase {
    position: relative;
    z-index: 2;
}

.book-cover {
    width: 400px;
    height: auto;
    border-radius: 15px;
    box-shadow: var(--power-shadow);
    transition: all 0.5s ease;
    border: 2px solid var(--metallic-silver);
}

.book-cover:hover {
    transform: translateY(-10px) rotateY(-10deg) scale(1.05);
    box-shadow: var(--neon-glow-blue);
}

.book-glow {
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: radial-gradient(circle, var(--neon-blue) 0%, transparent 70%);
    opacity: 0.3;
    animation: bookPulse 4s ease-in-out infinite;
    border-radius: 20px;
}

@keyframes bookPulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.1); opacity: 0.6; }
}

.neural-network {
    position: absolute;
    width: 500px;
    height: 500px;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"><defs><pattern id="neural" x="0" y="0" width="40" height="40" patternUnits="userSpaceOnUse"><circle cx="20" cy="20" r="2" fill="%2300BFFF" opacity="0.6"/><path d="M20 20L40 0M20 20L40 40M20 20L0 40M20 20L0 0" stroke="%2300BFFF" stroke-width="0.5" opacity="0.3"/></pattern></defs><rect width="200" height="200" fill="url(%23neural)"/></svg>') repeat;
    opacity: 0.2;
    animation: neuralFlow 20s linear infinite;
}

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

/* Section Styles */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-title {
    font-family: var(--font-futuristic);
    font-size: 3rem;
    font-weight: 900;
    color: var(--american-white);
    margin-bottom: var(--space-lg);
    text-transform: uppercase;
    letter-spacing: 2px;
    background: var(--metallic-gradient);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.title-underline {
    width: 100px;
    height: 4px;
    background: var(--neon-blue);
    margin: 0 auto var(--space-lg);
    box-shadow: var(--neon-glow-blue);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--metallic-silver);
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about-section {
    padding: var(--space-3xl) 0;
    background: rgba(0, 0, 0, 0.3);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.lead-text {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--neon-blue);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--metallic-silver);
    margin-bottom: var(--space-lg);
    line-height: 1.7;
}

.key-points {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-2xl);
}

.point-item {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
    padding: var(--space-lg);
    background: rgba(0, 40, 104, 0.2);
    border: 1px solid var(--neon-blue);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.point-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--neon-glow-blue);
}

.point-icon {
    font-size: 2rem;
    color: var(--neon-blue);
    min-width: 50px;
}

.point-content h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--american-white);
    margin-bottom: var(--space-sm);
}

.point-content p {
    color: var(--metallic-silver);
    line-height: 1.5;
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.world-map {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--neon-blue) 0%, transparent 70%);
    border-radius: 50%;
    position: relative;
    animation: mapRotate 30s linear infinite;
}

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

.map-overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="%2300BFFF" stroke-width="2" opacity="0.6"/><circle cx="50" cy="50" r="25" fill="none" stroke="%23FF073A" stroke-width="1" opacity="0.4"/><circle cx="50" cy="50" r="10" fill="%23FFD700" opacity="0.8"/></svg>') center/contain no-repeat;
}

/* Competition Section */
.competition-section {
    padding: var(--space-3xl) 0;
    background: rgba(220, 20, 60, 0.05);
}

.competition-dashboard {
    margin-top: var(--space-2xl);
}

.competition-metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.metric-card {
    background: rgba(0, 40, 104, 0.3);
    border: 2px solid var(--neon-blue);
    border-radius: 15px;
    padding: var(--space-xl);
    backdrop-filter: blur(15px);
    box-shadow: var(--neon-glow-blue);
    transition: all 0.3s ease;
}

.metric-card:hover {
    transform: translateY(-5px);
    border-color: var(--neon-red);
    box-shadow: var(--neon-glow-red);
}

.metric-card h3 {
    font-family: var(--font-futuristic);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--american-white);
    margin-bottom: var(--space-lg);
    text-transform: uppercase;
    text-align: center;
}

.chart-container {
    height: 250px;
    position: relative;
}

/* Chapters Section */
.chapters-section {
    padding: var(--space-3xl) 0;
    background: rgba(0, 0, 0, 0.4);
}

.chapter-showcase {
    background: var(--power-gradient);
    border: 2px solid var(--gold-accent);
    border-radius: 20px;
    padding: var(--space-2xl);
    margin-bottom: var(--space-3xl);
    box-shadow: 0 0 40px rgba(255, 215, 0, 0.3);
}

.chapter-header {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.chapter-number {
    font-family: var(--font-futuristic);
    font-size: 4rem;
    font-weight: 900;
    color: var(--gold-accent);
    text-shadow: var(--neon-glow-blue);
    min-width: 120px;
}

.chapter-info {
    flex: 1;
}

.chapter-info h3 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--american-white);
    margin-bottom: var(--space-sm);
}

.chapter-subtitle {
    font-size: 1.2rem;
    color: var(--neon-blue);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.free-badge {
    background: var(--american-red);
    color: var(--american-white);
    padding: var(--space-sm) var(--space-lg);
    border-radius: 25px;
    font-weight: 700;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: var(--neon-glow-red);
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.chapter-sections {
    display: grid;
    gap: var(--space-lg);
}

.section-box {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--metallic-silver);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.section-box:hover {
    border-color: var(--neon-blue);
    box-shadow: var(--neon-glow-blue);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    background: rgba(0, 40, 104, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
}

.section-header:hover {
    background: rgba(0, 40, 104, 0.5);
}

.section-header h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--american-white);
}

.toggle-icon {
    font-size: 1.5rem;
    color: var(--neon-blue);
    font-weight: bold;
    transition: transform 0.3s ease;
}

.section-content {
    display: none;
    padding: var(--space-xl);
    background: rgba(0, 0, 0, 0.3);
}

.section-content.active {
    display: block;
    animation: slideDown 0.3s ease;
}

.section-content.active + .section-header .toggle-icon {
    transform: rotate(45deg);
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-content p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--metallic-silver);
    margin-bottom: var(--space-lg);
}

.section-content strong {
    color: var(--neon-blue);
    font-weight: 700;
}

.chapters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-2xl);
}

.chapter-card {
    background: rgba(0, 40, 104, 0.3);
    border: 2px solid var(--metallic-silver);
    border-radius: 15px;
    padding: var(--space-xl);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    cursor: pointer;
}

.chapter-card:hover {
    transform: translateY(-5px);
    border-color: var(--neon-blue);
    box-shadow: var(--neon-glow-blue);
}

.chapter-header-small {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.chapter-num {
    font-family: var(--font-futuristic);
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--neon-blue);
    min-width: 80px;
}

.chapter-details {
    flex: 1;
}

.chapter-details h4 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--american-white);
    margin-bottom: var(--space-xs);
}

.chapter-details p {
    font-size: 0.9rem;
    color: var(--neon-red);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.preview-badge {
    background: var(--neon-blue);
    color: var(--american-white);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    box-shadow: var(--neon-glow-blue);
}

.chapter-excerpt {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--metallic-silver);
    margin-bottom: var(--space-lg);
}

.read-btn {
    background: var(--american-red);
    color: var(--american-white);
    border: none;
    padding: var(--space-md) var(--space-xl);
    border-radius: 8px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    width: 100%;
}

.read-btn:hover {
    background: var(--neon-red);
    box-shadow: var(--neon-glow-red);
    transform: translateY(-2px);
}

/* Author Section */
.author-section {
    padding: var(--space-3xl) 0;
    background: rgba(255, 255, 255, 0.05);
}

.author-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-3xl);
    align-items: center;
}

.author-image {
    text-align: center;
    position: relative;
}

.author-photo {
    width: 300px;
    height: 300px;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid var(--metallic-silver);
    box-shadow: var(--power-shadow);
    transition: all 0.5s ease;
}

.author-photo:hover {
    transform: scale(1.05);
    border-color: var(--neon-blue);
    box-shadow: var(--neon-glow-blue);
}

.author-glow {
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: radial-gradient(circle, var(--neon-blue) 0%, transparent 70%);
    opacity: 0.3;
    animation: authorPulse 4s ease-in-out infinite;
    border-radius: 50%;
}

@keyframes authorPulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.1); opacity: 0.6; }
}

.author-info h3 {
    font-family: var(--font-futuristic);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--american-white);
    margin-bottom: var(--space-sm);
}

.author-title {
    font-size: 1.3rem;
    color: var(--gold-accent);
    font-weight: 600;
    margin-bottom: var(--space-xl);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.author-bio {
    margin-bottom: var(--space-xl);
}

.author-bio p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--metallic-silver);
    margin-bottom: var(--space-lg);
}

.author-bio strong {
    color: var(--neon-blue);
    font-weight: 700;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.expertise-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: rgba(0, 40, 104, 0.2);
    border: 1px solid var(--neon-blue);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.expertise-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--neon-glow-blue);
}

.expertise-icon {
    font-size: 1.5rem;
    color: var(--neon-blue);
}

.expertise-item span {
    color: var(--american-white);
    font-weight: 600;
}

/* Purchase Section */
.purchase-section {
    padding: var(--space-3xl) 0;
    background: var(--power-gradient);
}

.purchase-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.book-showcase-large {
    text-align: center;
}

.purchase-book-cover {
    width: 350px;
    height: auto;
    border-radius: 15px;
    box-shadow: var(--power-shadow);
    border: 3px solid var(--gold-accent);
    margin-bottom: var(--space-xl);
    transition: all 0.5s ease;
}

.purchase-book-cover:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: var(--neon-glow-blue);
}

.book-details h3 {
    font-family: var(--font-futuristic);
    font-size: 2rem;
    font-weight: 700;
    color: var(--american-white);
    margin-bottom: var(--space-sm);
}

.book-subtitle {
    font-size: 1.1rem;
    color: var(--metallic-silver);
    margin-bottom: var(--space-sm);
    line-height: 1.5;
}

.book-author {
    font-size: 1.2rem;
    color: var(--gold-accent);
    font-weight: 600;
    margin-bottom: var(--space-lg);
    text-transform: uppercase;
}

.book-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    font-size: 0.9rem;
    color: var(--neon-blue);
    font-weight: 600;
}

.purchase-options {
    display: grid;
    gap: var(--space-lg);
}

.purchase-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-lg) var(--space-xl);
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.purchase-btn.primary {
    background: var(--american-red);
    color: var(--american-white);
    border-color: var(--american-red);
    box-shadow: var(--neon-glow-red);
}

.purchase-btn.secondary {
    background: var(--neon-blue);
    color: var(--american-white);
    border-color: var(--neon-blue);
    box-shadow: var(--neon-glow-blue);
}

.purchase-btn.tertiary {
    background: transparent;
    color: var(--gold-accent);
    border-color: var(--gold-accent);
}

.purchase-btn:hover {
    transform: translateY(-3px) scale(1.02);
}

.btn-subtitle {
    font-size: 0.9rem;
    font-weight: 400;
    opacity: 0.8;
    margin-top: var(--space-xs);
    text-transform: none;
    letter-spacing: 0;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--power-gradient);
    border: 2px solid var(--neon-blue);
    border-radius: 20px;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--neon-glow-blue);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-xl);
    border-bottom: 2px solid var(--neon-blue);
    background: rgba(0, 0, 0, 0.3);
}

.modal-header h2 {
    font-family: var(--font-futuristic);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--american-white);
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--neon-red);
    cursor: pointer;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: rgba(255, 7, 58, 0.2);
    color: var(--american-white);
    box-shadow: var(--neon-glow-red);
}

.modal-body {
    padding: var(--space-xl);
    max-height: 70vh;
    overflow-y: auto;
}

.reading-progress {
    margin-bottom: var(--space-xl);
}

.progress-bar {
    height: 6px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: var(--space-sm);
    border: 1px solid var(--neon-blue);
}

.progress-fill {
    height: 100%;
    background: var(--neon-blue);
    width: 0%;
    transition: width 0.3s ease;
    box-shadow: var(--neon-glow-blue);
}

.progress-text {
    font-size: 0.9rem;
    color: var(--metallic-silver);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.chapter-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--metallic-silver);
    margin-bottom: var(--space-xl);
}

.chapter-text h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: var(--space-xl) 0 var(--space-lg);
    color: var(--neon-blue);
}

.chapter-text p {
    margin-bottom: var(--space-lg);
}

.chapter-text strong {
    color: var(--american-white);
    font-weight: 700;
}

.modal-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    padding-top: var(--space-lg);
    border-top: 2px solid var(--neon-blue);
}

/* Footer */
.footer {
    background: var(--deep-navy);
    border-top: 2px solid var(--neon-blue);
    padding: var(--space-2xl) 0 var(--space-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-2xl);
}

.footer-brand h3 {
    font-family: var(--font-futuristic);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--american-white);
    margin-bottom: var(--space-sm);
}

.footer-brand p {
    color: var(--metallic-silver);
    margin-bottom: var(--space-sm);
}

.copyright {
    font-size: 0.9rem;
    color: var(--neon-blue);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.link-group h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--space-lg);
    color: var(--american-white);
    text-transform: uppercase;
}

.link-group ul {
    list-style: none;
    padding: 0;
}

.link-group li {
    margin-bottom: var(--space-sm);
}

.link-group a {
    color: var(--metallic-silver);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

.link-group a:hover {
    color: var(--neon-blue);
    text-shadow: var(--neon-glow-blue);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-2xl);
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .competition-metrics {
        grid-template-columns: 1fr;
    }
    
    .key-points {
        grid-template-columns: 1fr;
    }
    
    .purchase-content {
        grid-template-columns: 1fr;
    }
    
    .author-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .expertise-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-actions {
        display: none;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .book-cover {
        width: 300px;
    }
    
    .chapters-grid {
        grid-template-columns: 1fr;
    }
    
    .chapter-header {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .book-cover {
        width: 250px;
    }
    
    .purchase-book-cover {
        width: 250px;
    }
    
    .author-photo {
        width: 200px;
        height: 200px;
    }
    
    .modal-content {
        width: 95%;
    }
    
    .modal-header,
    .modal-body {
        padding: var(--space-lg);
    }
}

/* Utility Classes */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.text-glow {
    text-shadow: var(--neon-glow-blue);
}

.border-glow {
    box-shadow: var(--neon-glow-blue);
}