/* Modern CSS Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.7;
    color: #2c3e50;
    background-color: #ffffff;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: #1a202c;
}

h2 {
    color: #ffffff;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
    margin-bottom: 1.5rem;
    color: #4a5568;
    max-width: 65ch;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Title Section */
.title-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 4rem 0;
    margin-bottom: 0;
}

.title-section h1 {
    color: white;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    max-width: 60ch;
    margin: 0 auto;
    color: white;
}

/* Table of Contents */
.toc {
    padding: 4rem 0;
    background: #f8fafc;
}

.toc h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: #ffffff;
}

.toc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.toc-item {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-decoration: none;
    color: #2d3748;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.toc-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px -3px rgba(0, 0, 0, 0.1);
    border-color: #667eea;
}



.toc-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: #2d3748;
}

/* Section Styles */
.section {
    padding: 4rem 0;
}

.section:nth-child(even) {
    background: #f8fafc;
}

.section h2 {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
}

/* Benefits Section */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.benefit-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}



.benefit-card h3 {
    color: #2d3748;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.benefit-card p {
    color: #718096;
    margin: 0 auto;
}

/* Content Layout */
.content-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.content-text {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
}

.content-text h3 {
    color: #667eea;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.technique-list {
    list-style: none;
    margin: 2rem 0;
}

.technique-list li {
    margin-bottom: 1rem;
    padding: 1rem;
    background: #f7fafc;
    border-radius: 8px;
    border-left: 4px solid #667eea;
    position: relative;
}

.technique-list li strong {
    color: #2d3748;
    display: block;
    margin-bottom: 0.5rem;
}

.technique-list li a {
    color: #667eea;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s ease;
    margin-left: 0.5rem;
}

.technique-list li a:hover {
    color: #764ba2;
    text-decoration: underline;
}

.tip-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    border-radius: 12px;
    margin: 2rem 0;
    font-weight: 500;
    box-shadow: 0 10px 15px -3px rgba(102, 126, 234, 0.2);
}

.tip-box strong {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}



/* Technique Cards */
.footwork-techniques, 
.defense-grid, 
.training-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.technique-card,
.defense-card,
.training-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.technique-card:hover,
.defense-card:hover,
.training-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.technique-card h3,
.defense-card h3,
.training-card h3 {
    color: #667eea;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}



/* Punching Section */
.punching-fundamentals {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    margin-bottom: 3rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 3rem;
}

.technique-steps {
    list-style: none;
    counter-reset: step-counter;
}

.technique-steps li {
    counter-increment: step-counter;
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: #f7fafc;
    border-radius: 12px;
    position: relative;
    padding-left: 4rem;
    border-left: 4px solid #667eea;
}

.technique-steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: #667eea;
    color: white;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9rem;
}

/* Punches Grid */
.punches-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 3rem;
}

.punch-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.punch-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}



.punch-card h3 {
    color: #2d3748;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.punch-card h4 {
    color: #667eea;
    margin: 1.5rem 0 1rem 0;
    font-size: 1.25rem;
}

.punch-card ul {
    margin: 1rem 0;
}

.punch-card li {
    margin-bottom: 0.75rem;
    color: #4a5568;
}

.punch-benefits {
    background: #edf2f7;
    padding: 1.5rem;
    border-radius: 12px;
    margin-top: 1.5rem;
    border-left: 4px solid #667eea;
}

.punch-benefits strong {
    color: #2d3748;
    display: block;
    margin-bottom: 0.5rem;
}

/* Punching Tips */
.punching-tips {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    max-width: 800px;
    margin: 0 auto;
}

.tips-list {
    list-style: none;
}

.tips-list li {
    margin-bottom: 1rem;
    padding: 1rem;
    background: #f7fafc;
    border-radius: 8px;
    border-left: 4px solid #48bb78;
    position: relative;
    padding-left: 3rem;
}

.tips-list li::before {
    content: '✓';
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #48bb78;
    font-weight: bold;
    font-size: 1.2rem;
}

/* Call to Action */
.cta-section {
    background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.cta-section h2 {
    color: white;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    color: white;
    max-width: none;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.cta-button.secondary {
    background: transparent;
    border: 2px solid #667eea;
    color: #667eea;
}

.cta-button.secondary:hover {
    background: #667eea;
    color: white;
}



/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 50%;
    width: 3.5rem;
    height: 3.5rem;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

/* Reading Progress Bar */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    z-index: 1001;
    transition: width 0.3s ease;
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-item {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Focus Styles for Accessibility */
.toc-item:focus,
.cta-button:focus,
.scroll-to-top:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .title-section {
        padding: 3rem 0;
    }
    
    .section {
        padding: 3rem 0;
    }
    
    .toc-grid,
    .benefits-grid,
    .footwork-techniques,
    .defense-grid,
    .training-grid {
        grid-template-columns: 1fr;
    }
    
    .punches-grid {
        grid-template-columns: 1fr;
    }
    
    .technique-card,
    .defense-card,
    .training-card,
    .punch-card,
    .benefit-card {
        padding: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .scroll-to-top {
        width: 3rem;
        height: 3rem;
        font-size: 1.25rem;
        bottom: 1.5rem;
        right: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }
    
    .title-section {
        padding: 2.5rem 0;
    }
    
    .section {
        padding: 2.5rem 0;
    }
    
    .technique-card,
    .defense-card,
    .training-card,
    .punch-card,
    .benefit-card,
    .content-text,
    .punching-fundamentals,
    .punching-tips {
        padding: 1.5rem;
    }
    
    .toc-item {
        padding: 1.5rem;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Print Styles */
@media print {
    .scroll-to-top,
    .cta-section {
        display: none;
    }
    
    .section {
        break-inside: avoid;
        padding: 1rem 0;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
        color: #000;
    }
    
    .title-section {
        background: none;
        color: #000;
        padding: 1rem 0;
    }
}