:root {
    /* Modern Color Palette */
    --primary-color: #10B981;
    --primary-dark: #059669;
    --primary-light: #D1FAE5;

    --secondary-color: #F59E0B;
    --secondary-light: #FEF3C7;

    --bg-color: #E5E7EB;
    --bg-surface: #F3F4F6;

    --text-main: #111827;
    --text-muted: #4B5563;

    /* Modern Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Typography */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing & Radius */
    --container-padding: 1.5rem;
    --section-spacing: 5rem;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;
}

html {
    scroll-behavior: smooth;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4 {
    font-family: var(--font-heading);
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-main);
    letter-spacing: -0.02em;
}

img {
    max-width: 100%;
    display: block;
    margin: 0 auto;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

.container {
    width: 100%;
    max-width: 640px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Urgency Banner - Letreiro */
.urgency-banner {
    background: linear-gradient(135deg, #DC2626, #991B1B);
    color: white;
    padding: 0.6rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    white-space: nowrap;
}

.marquee {
    display: flex;
    overflow: hidden;
}

.marquee-content {
    display: flex;
    animation: scroll 20s linear infinite;
    will-change: transform;
}

.marquee-content span {
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    padding: 0 2rem;
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-33.333%);
    }
}

.marquee:hover .marquee-content {
    animation-play-state: paused;
}

/* Hero Section */
.hero {
    padding: 4rem 0 3rem;
    text-align: center;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    color: #000;
    line-height: 1.2;
}

.hero-subtitle {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(5, 150, 105, 0.05));
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: 2rem;
    text-align: left;
}

.subtitle-intro {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.benefits-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.benefits-list li {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.75rem;
    padding-left: 0.5rem;
    line-height: 1.5;
}

.benefits-list li:last-child {
    margin-bottom: 0;
}

.hero-img {
    max-width: 100%;
    margin: 2rem auto;
    border-radius: var(--radius-lg);
}

.hero-price {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: linear-gradient(135deg, #FEF3C7, #FDE68A);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.price-strikethrough {
    text-decoration: line-through;
    color: #DC2626;
    font-size: 1.1rem;
}

.price-highlight {
    color: var(--primary-dark);
    font-size: 1.8rem;
    font-weight: 900;
}

.cta-wrapper {
    max-width: 450px;
    margin: 0 auto;
}

/* Modern Buttons */
.cta-button {
    display: block;
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    text-align: center;
    padding: 1.25rem 2rem;
    border-radius: 100px;
    box-shadow: 0 4px 14px 0 rgba(16, 185, 129, 0.39);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: none;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.23);
}

.cta-button:active {
    transform: translateY(1px);
    box-shadow: 0 3px 10px rgba(16, 185, 129, 0.2);
}

@keyframes pulse-glow {

    0%,
    100% {
        box-shadow: 0 0 20px rgba(16, 185, 129, 0.4);
    }

    50% {
        box-shadow: 0 0 30px rgba(16, 185, 129, 0.6);
    }
}

.pulse {
    animation: pulse-glow 2s ease-in-out infinite;
}

/* Books Section 3D */
.books-section {
    padding: var(--section-spacing) 0;
    background: var(--bg-surface);
}

.cost-benefit-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    max-width: 600px;
    margin: 0 auto;
}

.book-card-3d {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    display: flex;
    flex-direction: column;
}

.book-3d-scene {
    perspective: 1000px;
    width: 100%;
    height: 200px;
    margin-bottom: 1.5rem;
    position: relative;
    cursor: grab;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
}

.book-3d-scene:active {
    cursor: grabbing;
}

.book-3d {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.1s cubic-bezier(0.23, 1, 0.32, 1);
    will-change: transform;
}

.book-cover-3d {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 4px;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.3));
}

/* Animação de auto-rotação */
@keyframes autoRotate {
    0% {
        transform: rotateY(0deg) rotateX(0deg);
    }

    25% {
        transform: rotateY(10deg) rotateX(-5deg);
    }

    50% {
        transform: rotateY(0deg) rotateX(-10deg);
    }

    75% {
        transform: rotateY(-10deg) rotateX(-5deg);
    }

    100% {
        transform: rotateY(0deg) rotateX(0deg);
    }
}

.book-3d.auto-rotate {
    animation: autoRotate 6s ease-in-out infinite;
}

.book-category {
    font-size: 1rem;
    font-weight: 800;
    color: #000;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.book-description {
    font-size: 0.85rem;
    color: #333;
    line-height: 1.6;
}

/* Comparison */
.comparison {
    padding: var(--section-spacing) 0;
    background: var(--bg-color);
    text-align: center;
}

.comparison-title {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    color: #000;
    line-height: 1.1;
}

.comparison-text {
    font-size: 0.95rem;
    max-width: 800px;
    margin: 0 auto 2rem;
    color: #000;
    font-weight: 500;
}

.benefit-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    max-width: 500px;
    margin: 0 auto;
}

.benefit-img {
    width: 100%;
    max-width: 200px;
    margin: 0 auto;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Social Proof */
.social-proof {
    padding: var(--section-spacing) 0;
    text-align: center;
    background: var(--bg-surface);
}

.testimonials-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.testimonial-img {
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}

/* Benefits Section */
.benefits {
    padding: var(--section-spacing) 0;
    background: var(--bg-color);
    text-align: center;
}

.benefits-intro {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-main);
    max-width: 700px;
    margin: 0 auto 3rem;
    line-height: 1.6;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto 3rem;
}

.benefit-card {
    background: white;
    padding: 2rem 1.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.benefit-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0 auto 1rem;
}

.benefit-title {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 1rem;
    text-transform: uppercase;
    line-height: 1.2;
}

.benefit-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.benefits-cta {
    max-width: 400px;
    margin: 0 auto;
}

/* Offer Section */
.offer {
    padding: var(--section-spacing) 0;
    background: linear-gradient(to bottom, var(--bg-color), var(--bg-surface));
}

.offer-card {
    background: white;
    padding: 3rem 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    text-align: center;
    position: relative;
}

.offer-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: linear-gradient(to right, var(--primary-color), var(--primary-dark));
}

.offer-title {
    color: #DC2626;
    font-size: 2.25rem;
    font-weight: 900;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    letter-spacing: -0.03em;
}

.offer-features {
    margin: 2.5rem 0;
    padding: 2rem;
    background: var(--bg-color);
    border-radius: var(--radius-md);
    text-align: left;
}

.offer-feature-item {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0.5rem;
}

.offer-feature-item::before {
    content: '✓';
    color: var(--primary-color);
    font-weight: 900;
    flex-shrink: 0;
}

.price-container {
    margin: 2rem 0;
}

.price-old {
    text-decoration: line-through;
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.price-new {
    font-size: 4.5rem;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1;
    letter-spacing: -0.04em;
}

/* Guarantee */
.guarantee {
    padding: var(--section-spacing) 0;
    text-align: center;
    background: var(--bg-surface);
}

.guarantee-seal {
    max-width: 150px;
    margin: 0 auto 2rem;
}

.guarantee-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.guarantee-text {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 3rem;
    line-height: 1.7;
}

.faq-section {
    margin-top: 0;
    text-align: left;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.faq-item {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
}

.faq-item h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.75rem;
}

.faq-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Footer */
footer {
    background: var(--text-main);
    color: white;
    text-align: center;
    padding: 2rem 0;
}

footer p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Notificação de Prova Social */
.social-notification {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: white;
    padding: 1rem 1.25rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 9999;
    min-width: 280px;
    max-width: 320px;
    transition: all 0.4s ease;
}

.social-notification.hidden {
    opacity: 0;
    transform: translateX(-100%);
    pointer-events: none;
}

.social-notification.show {
    animation: slideIn 0.4s ease forwards;
}

.social-notification.hide {
    animation: slideOut 0.4s ease forwards;
}

.notification-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    flex-shrink: 0;
}

.notification-content {
    flex: 1;
}

.notification-name {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-main);
    margin-bottom: 0.25rem;
}

.notification-location {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.notification-action {
    font-size: 0.75rem;
    color: var(--primary-color);
    font-weight: 600;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-100%);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }

    to {
        opacity: 0;
        transform: translateX(-100%);
    }
}

/* Responsivo */
@media (max-width: 640px) {
    .urgency-banner {
        padding: 0.5rem 0;
    }

    .marquee-content span {
        font-size: 0.8rem;
    }

    .social-notification {
        bottom: 10px;
        left: 10px;
        right: 10px;
        min-width: auto;
        max-width: none;
    }
}