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

:root {
    --primary-color: #5D4E37;
    --secondary-color: #8B7355;
    --accent-color: #A0926B;
    --text-primary: #3D3428;
    --text-secondary: #6B5D4D;
    --bg-primary: #FAFAF8;
    --bg-secondary: #F5F3EF;
    --border-color: #E8E4DD;
    --shadow: 0 4px 6px -1px rgba(93, 78, 55, 0.1), 0 2px 4px -1px rgba(93, 78, 55, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(93, 78, 55, 0.1), 0 4px 6px -2px rgba(93, 78, 55, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
        sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
header {
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-color);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 6rem 0;
}

.hero h1 {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-size: 3.5rem;
    font-weight: 400;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.tagline {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

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

/* Buttons */
.btn {
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* Sections */
.section {
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
}

.section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
}

.section p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 2rem;
    text-align: center;
}

/* Books Section */
.books-section {
    background-color: var(--bg-secondary);
    padding: 4rem 2rem;
    margin: 4rem -2rem 0;
}

.books-intro {
    margin-bottom: 3rem;
    max-width: 700px;
}

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

.book-card {
    text-align: center;
}

.book-card.featured {
    transform: scale(1.05);
}

.book-cover {
    width: 180px;
    height: 270px;
    background: #ddd;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    font-size: 0.85rem;
    margin: 0 auto 1rem;
    border: 1px solid var(--border-color);
}

.book-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
}

.view-library {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 1.05rem;
    transition: color 0.3s ease;
}

.view-library:hover {
    color: var(--secondary-color);
}

@media (max-width: 768px) {
    .books-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .book-card.featured {
        transform: scale(1);
    }
}

/* Tools Section */
.tools-section {
    text-align: center;
}

.tools-list {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.tool-item {
    font-size: 1.125rem;
    line-height: 1.7;
}

.tool-item a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.tool-item a:hover {
    color: var(--secondary-color);
}

.tool-desc {
    color: var(--text-secondary);
}

/* Contact Section */
.contact-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.contact-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    transition: all 0.3s ease;
}

.contact-btn:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.contact-btn svg {
    width: 24px;
    height: 24px;
}

/* Footer */
footer {
    text-align: center;
    padding: 3rem 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    margin-top: 4rem;
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.footer-nav a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
}

.footer-nav a:hover {
    color: var(--primary-color);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .tagline {
        font-size: 1.25rem;
    }

    .section h2 {
        font-size: 2rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .contact-links {
        flex-direction: column;
    }

    .contact-btn {
        width: 100%;
        justify-content: center;
    }
}