:root {
    --primary: #f4943c;
    --secondary: #966944;
    --on-primary: #111111;
    --on-secondary: #ffffff;
    --bg: #ffffff;
    --surface: #f5f7fa;
    --light: #eef1f6;
    --dark: #1a1a1a;
    --muted: #5b6472;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';
    color: var(--dark);
    background-color: var(--bg);
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--dark);
    font-weight: 700;
}

p {
    color: var(--muted);
}

.text-white p, .text-white h2 {
    color: #ffffff !important;
}

/* Header */
.header-main {
    background-color: var(--bg);
    border-bottom: 1px solid var(--light);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    z-index: 1000;
}

.logo {
    max-height: 40px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: auto;
    max-width: 100%;
    padding: 14px 28px;
    margin: 8px 0;
    gap: 8px;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 16px;
    line-height: 1.2;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    box-sizing: border-box;
    cursor: pointer;
    transition: filter 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.btn-cta {
    background: var(--primary);
    color: var(--on-primary) !important;
    box-shadow: 0 6px 16px rgba(0,0,0,0.15);
}

.btn-secondary {
    background: var(--secondary);
    color: var(--on-secondary) !important;
}

.btn-cta:hover, .btn-secondary:hover {
    filter: brightness(0.92);
    box-shadow: 0 8px 20px rgba(0,0,0,0.20);
}

@media (max-width: 575.98px) {
    .btn-lg {
        display: block;
        width: 100%;
    }
    .d-flex.flex-column.flex-sm-row > .btn {
        width: 100%;
    }
}

/* Sections */
.hero-section, .benefits-section, .whats-inside-section, .product-intro-section, .author-section, .pricing-section, .final-cta-section {
    padding-top: 70px;
    padding-bottom: 70px;
}

@media (max-width: 767.98px) {
    .hero-section, .benefits-section, .whats-inside-section, .product-intro-section, .author-section, .pricing-section, .final-cta-section {
        padding-top: 40px;
        padding-bottom: 40px;
    }
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--bg) 0%, var(--surface) 100%);
}

.hero-section h1 {
    color: var(--dark);
    font-size: 3.2rem;
    line-height: 1.1;
}

.hero-section .lead {
    color: var(--muted);
    font-size: 1.3rem;
}

.book-cover {
    max-width: 400px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.price-text {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark);
    margin-top: 20px;
}

@media (max-width: 767.98px) {
    .hero-section h1 {
        font-size: 2.2rem;
    }
    .hero-section .lead {
        font-size: 1.1rem;
    }
    .book-cover {
        max-width: 280px;
    }
}

/* Benefits Section */
.benefits-section h2 {
    color: var(--dark);
}

.benefit-card {
    background-color: var(--surface);
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 18px rgba(0,0,0,0.10);
}

.benefit-card h3 {
    color: var(--primary);
    font-size: 1.4rem;
    margin-bottom: 10px;
}

.benefit-card p {
    color: var(--muted);
    font-size: 1rem;
}

/* What's Inside Section */
.whats-inside-section {
    background-color: var(--surface);
}

.chapter-card {
    background-color: var(--bg);
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    padding: 24px;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-left: 5px solid var(--primary);
}

.chapter-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 18px rgba(0,0,0,0.10);
}

.chapter-number {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--light);
    opacity: 0.6;
    line-height: 1;
}

.chapter-card h3 {
    color: var(--dark);
    font-size: 1.35rem;
    margin-bottom: 8px;
    padding-right: 60px;
}

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

/* Product Intro Section */
.book-cover-lg {
    max-width: 450px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.product-intro-section h2 {
    color: var(--dark);
}

.product-intro-section .lead {
    color: var(--dark);
}

.intro-list {
    list-style: none;
    padding-left: 0;
}

.intro-list li {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    font-size: 1.1rem;
    color: var(--muted);
}

.intro-list svg {
    color: var(--primary);
}

/* Author Section */
.author-section {
    background-color: var(--surface);
}

.author-card {
    max-width: 400px;
    background-color: var(--bg);
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    border: 1px solid var(--light);
}

.avatar-fallback {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: var(--light);
    color: var(--dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.author-card h3 {
    color: var(--dark);
    margin-bottom: 5px;
}

.author-card p {
    color: var(--muted);
}

/* Pricing Section */
.pricing-section h2 {
    color: var(--dark);
}

.price-display {
    color: var(--primary);
}

/* Final CTA Section */
.final-cta-section {
    background-color: var(--dark);
}

.final-cta-section h2, .final-cta-section p {
    color: #ffffff;
}

/* Footer */
.footer-main {
    background-color: var(--dark);
    color: var(--muted);
    font-size: 0.9rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-main p {
    color: var(--muted);
    margin-bottom: 0;
}

/* General Image styles */
img {
    display: block;
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    loading: lazy;
}