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

:root {
    --color-red: #C41E3A;
    --color-black: #1a1a1a;
    --color-off-white: #F5F5F0;
    --color-white: #FFFFFF;
    --color-gray: #666666;
    --color-light-gray: #E5E5E5;
    
    --font-serif: 'Georgia', 'Times New Roman', serif;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-black);
    background-color: var(--color-off-white);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Hero Section - Tudo na primeira tela */
.hero {
    height: 100vh;
    max-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-off-white) 0%, var(--color-white) 100%);
    padding: var(--spacing-sm);
    overflow: hidden;
}

.hero-main {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--spacing-sm);
    width: 100%;
    max-width: 1400px;
    align-items: start;
    height: calc(100vh - 2rem);
    overflow: hidden;
}

.hero-main::-webkit-scrollbar {
    width: 8px;
}

.hero-main::-webkit-scrollbar-track {
    background: var(--color-light-gray);
    border-radius: 4px;
}

.hero-main::-webkit-scrollbar-thumb {
    background: var(--color-gray);
    border-radius: 4px;
}

.hero-main::-webkit-scrollbar-thumb:hover {
    background: var(--color-black);
}

.book-cover {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    position: sticky;
    top: 0;
}

.book-cover img {
    max-width: 100%;
    height: auto;
    max-height: calc(100vh - 2rem);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border-radius: 4px;
    transition: var(--transition);
}

.book-cover img:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-right: var(--spacing-sm);
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
}

.hero-content::-webkit-scrollbar {
    width: 6px;
}

.hero-content::-webkit-scrollbar-track {
    background: transparent;
}

.hero-content::-webkit-scrollbar-thumb {
    background: var(--color-gray);
    border-radius: 3px;
}

.hero-content::-webkit-scrollbar-thumb:hover {
    background: var(--color-black);
}

.hero-header {
    margin-bottom: 0.25rem;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--color-red);
    margin-bottom: 0.25rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--color-gray);
    margin-bottom: 0.5rem;
    font-style: italic;
}

.hero-author {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--color-black);
    margin-bottom: 0.5rem;
}

.hero-badge {
    display: inline-block;
    background-color: var(--color-black);
    color: var(--color-white);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.85rem;
    margin-bottom: var(--spacing-sm);
}

.hero-description {
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 0.25rem;
}

.hero-description p {
    margin-bottom: 0.4rem;
    color: var(--color-gray);
}

.hero-description .lead {
    font-size: 0.95rem;
    color: var(--color-black);
    font-weight: 500;
}

.hero-description strong {
    color: var(--color-black);
    font-weight: 600;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.feature-item {
    background-color: var(--color-white);
    padding: 0.5rem;
    border-radius: 4px;
    box-shadow: 0 1px 5px rgba(0, 0, 0, 0.1);
}

.feature-item strong {
    display: block;
    font-size: 0.85rem;
    color: var(--color-red);
    margin-bottom: 0.2rem;
    font-family: var(--font-serif);
}

.feature-item p {
    font-size: 0.75rem;
    color: var(--color-gray);
    line-height: 1.3;
    margin: 0;
}

.hero-credibility {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: 0.25rem;
}

.cred-item {
    font-size: 0.8rem;
    color: var(--color-gray);
    padding: 0.2rem 0;
}

.hero-details {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    font-size: 0.8rem;
    color: var(--color-gray);
    margin-bottom: 0.25rem;
}

.hero-details span strong {
    color: var(--color-black);
    margin-right: 0.25rem;
}

.hero-cta {
    margin-top: 0.25rem;
}

.cta-note {
    font-size: 0.85rem;
    color: var(--color-gray);
    margin-top: 0.4rem;
    text-align: center;
    font-style: italic;
}

/* Buttons */
.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--color-red);
    color: var(--color-white);
    text-decoration: none;
    border-radius: 4px;
    font-weight: bold;
    font-size: 1.1rem;
    transition: var(--transition);
    border: 2px solid var(--color-red);
    cursor: pointer;
    text-align: center;
}

.cta-button:hover {
    background-color: transparent;
    color: var(--color-red);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(196, 30, 58, 0.3);
}

.cta-button.large {
    padding: 1.25rem 3rem;
    font-size: 1.25rem;
}

.cta-button.large {
    padding: 0.875rem 2rem;
    font-size: 1rem;
    width: 100%;
    max-width: 400px;
    display: block;
    margin: 0 auto;
}

/* Footer */
.footer {
    background-color: var(--color-black);
    color: var(--color-white);
    text-align: center;
    padding: var(--spacing-md) 0;
    font-size: 0.9rem;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-main {
        grid-template-columns: 220px 1fr;
        gap: var(--spacing-xs);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: var(--spacing-xs);
    }
    
    .hero-main {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
        height: calc(100vh - 1rem);
    }
    
    .book-cover {
        position: relative;
        max-width: 150px;
        margin: 0 auto 0.5rem;
    }
    
    .book-cover img {
        max-height: 200px;
    }
    
    .hero-content {
        padding-right: 0;
        text-align: center;
        height: auto;
        overflow: visible;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-subtitle {
        font-size: 0.95rem;
    }
    
    .hero-author {
        font-size: 1rem;
    }
    
    .hero-badge {
        font-size: 0.75rem;
        padding: 0.2rem 0.6rem;
    }
    
    .hero-description {
        font-size: 0.85rem;
    }
    
    .hero-features {
        grid-template-columns: 1fr;
    }
    
    .hero-credibility {
        justify-content: center;
        font-size: 0.75rem;
    }
    
    .hero-details {
        justify-content: center;
        font-size: 0.75rem;
    }
    
    .container {
        padding: 0 var(--spacing-xs);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-description {
        font-size: 0.85rem;
    }
    
    .feature-item {
        padding: 0.5rem;
    }
    
    .feature-item strong {
        font-size: 0.85rem;
    }
    
    .feature-item p {
        font-size: 0.75rem;
    }
    
    .cta-button.large {
        padding: 0.75rem 1.5rem;
        font-size: 0.95rem;
    }
}