/* Reset e Configurações Básicas */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Paleta de Cores - Terra, Ferro e Máquinas */
    --primary-orange: #FF6B00;
    --primary-blue: #005BAA;
    --dark-gray: #2C2C2C;
    --medium-gray: #4A4A4A;
    --light-gray: #F5F5F5;
    --white: #FFFFFF;
    --earth-brown: #8B4513;
    --steel-gray: #708090;
    --warning-yellow: #FFD700;
    
    /* Tipografia */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    
    /* Sombras */
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 8px 30px rgba(0, 0, 0, 0.2);
    
    /* Transições */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Barra de Promoção */
.promo-banner {
    background: linear-gradient(135deg, var(--warning-yellow), #FFA500);
    color: var(--dark-gray);
    text-align: center;
    padding: 12px 0;
    font-weight: 600;
    font-size: 14px;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-light);
}

.promo-banner p {
    margin: 0;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('assets/images/hero-background.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(44, 44, 44, 0.8) 0%,
        rgba(0, 91, 170, 0.7) 50%,
        rgba(255, 107, 0, 0.6) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 0;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    font-weight: 400;
    margin-bottom: 40px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1s ease-out 0.2s both;
}

/* Botões CTA */
.cta-button {
    display: inline-block;
    padding: 16px 32px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 16px;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 8px;
    transition: all var(--transition-medium);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-medium);
    position: relative;
    overflow: hidden;
}

.cta-button.primary {
    background: linear-gradient(135deg, var(--primary-orange), #FF8533);
    color: var(--white);
}

.cta-button.primary:hover {
    background: linear-gradient(135deg, #E55A00, var(--primary-orange));
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

.cta-button.secondary {
    background: linear-gradient(135deg, var(--primary-blue), #0066CC);
    color: var(--white);
}

.cta-button.secondary:hover {
    background: linear-gradient(135deg, #004488, var(--primary-blue));
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

.cta-button.large {
    padding: 20px 40px;
    font-size: 18px;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.cta-button:hover::before {
    left: 100%;
}

/* Seções */
.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: var(--dark-gray);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-orange), var(--primary-blue));
    border-radius: 2px;
}

/* Seção dos Ebooks */
.ebooks-section {
    padding: 100px 0;
    background-color: var(--light-gray);
}

.ebooks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.ebook-card {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: all var(--transition-medium);
    position: relative;
}

.ebook-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-heavy);
}

.ebook-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.ebook-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.ebook-card:hover .ebook-image img {
    transform: scale(1.05);
}

.ebook-content {
    padding: 30px;
    text-align: center;
}

.ebook-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--dark-gray);
}

.ebook-description {
    font-size: 1rem;
    color: var(--medium-gray);
    margin-bottom: 25px;
    line-height: 1.6;
}

/* Seção de Benefícios */
.benefits-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--white) 0%, var(--light-gray) 100%);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.benefit-item {
    text-align: center;
    padding: 40px 20px;
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    transition: all var(--transition-medium);
    position: relative;
}

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

.benefit-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, var(--primary-orange), var(--primary-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.benefit-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--dark-gray);
}

.benefit-description {
    font-size: 1rem;
    color: var(--medium-gray);
    line-height: 1.6;
}

/* CTA Final */
.final-cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--dark-gray) 0%, var(--steel-gray) 100%);
    color: var(--white);
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.3;
}

.cta-subtitle {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.guarantee {
    margin-top: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

.guarantee-icon {
    color: var(--warning-yellow);
}

.guarantee-text {
    font-weight: 600;
    margin: 0;
}

/* Rodapé */
.footer {
    background: var(--dark-gray);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--primary-orange);
}

.footer-section p {
    margin-bottom: 10px;
    opacity: 0.8;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: inline-block;
    font-size: 1.5rem;
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.social-links a:hover {
    transform: scale(1.2);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--medium-gray);
    opacity: 0.7;
}

/* Animações */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Responsividade */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content {
        padding: 20px 0;
    }
    
    .ebooks-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .guarantee {
        flex-direction: column;
        gap: 10px;
    }
    
    .cta-button {
        padding: 14px 28px;
        font-size: 14px;
    }
    
    .cta-button.large {
        padding: 16px 32px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .ebooks-grid {
        grid-template-columns: 1fr;
    }
    
    .ebook-card {
        margin: 0 10px;
    }
    
    .promo-banner {
        font-size: 12px;
        padding: 10px 0;
    }
}

/* Melhorias de Performance */
.ebook-image img,
.hero-background {
    will-change: transform;
}

/* Estados de Foco para Acessibilidade */
.cta-button:focus,
.social-links a:focus {
    outline: 2px solid var(--primary-orange);
    outline-offset: 2px;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading States */
.ebook-image img {
    background: var(--light-gray);
}

/* Print Styles */
@media print {
    .promo-banner,
    .cta-button,
    .footer {
        display: none;
    }
    
    .hero {
        min-height: auto;
        page-break-after: always;
    }
}