/* ===== CSS Reset ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== CSS Variables ===== */
:root {
    --color-cream: #f5f1ea;
    --color-sage: #a3b18a;
    --color-sage-dark: #7a8f6a;
    --color-warm-gray: #8b7f77;
    --color-warm-gray-dark: #6b5f57;
    --color-soft-white: #fdfdfb;
    --color-text: #3a3531;
    --color-text-light: #6b635e;
    --color-border: #d8d2ca;
    --color-accent: #a8947d;
    
    --font-serif: 'Georgia', 'Garamond', 'Times New Roman', serif;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    
    --max-width: 1400px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    --shadow-sm: 0 2px 8px rgba(59, 53, 49, 0.08);
    --shadow-md: 0 4px 16px rgba(59, 53, 49, 0.12);
    --shadow-lg: 0 8px 24px rgba(59, 53, 49, 0.16);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Base Styles ===== */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-soft-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.2;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
}

h3 {
    font-size: clamp(1.35rem, 3vw, 1.85rem);
}

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--color-sage-dark);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-sage);
}

/* ===== Layout Containers ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* ===== Header & Navigation ===== */
header {
    background-color: rgba(253, 253, 251, 0.97);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(12px);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.site-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.nav-menu a {
    color: var(--color-text-light);
    font-size: 0.95rem;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-sage);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 0.85rem 1.75rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 1rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: var(--font-sans);
}

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

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

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

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

.btn-book {
    background-color: var(--color-warm-gray);
    color: var(--color-soft-white);
    margin-top: var(--spacing-sm);
}

.btn-book:hover {
    background-color: var(--color-warm-gray-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== Hero Section ===== */
.hero-section {
    background: linear-gradient(135deg, var(--color-cream) 0%, var(--color-soft-white) 100%);
    padding: var(--spacing-xl) 0;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-image {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    object-fit: cover;
    aspect-ratio: 3/4;
}

.hero-content {
    max-width: 650px;
}

.hero-content h1 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.intro-text {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.supporting-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* ===== Section Styles ===== */
section {
    padding: var(--spacing-xl) 0;
}

section h2 {
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.section-intro {
    text-align: center;
    font-size: 1.15rem;
    color: var(--color-text-light);
    margin: 0 auto var(--spacing-lg);
    max-width: 700px;
}

/* ===== Books Section ===== */
.books-section {
    background-color: var(--color-soft-white);
}

.book {
    background-color: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.book:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--color-sage);
}

.book-content-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    align-items: start;
}

.book-cover {
    width: 100%;
    max-width: 350px;
    margin: 0 auto;
}

.book-cover img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.book:hover .book-cover img {
    box-shadow: var(--shadow-lg);
    transform: scale(1.02);
}

.book-details {
    width: 100%;
}

.book-header h3 {
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.book-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-light);
    font-style: italic;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-serif);
}

.book-isbn {
    font-size: 0.9rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    font-family: monospace;
    letter-spacing: 0.5px;
}

.book-description {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.book-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.tag {
    background-color: var(--color-cream);
    color: var(--color-warm-gray-dark);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid var(--color-border);
}

/* ===== About Section ===== */
.about-section {
    background-color: var(--color-cream);
}

.about-content {
    max-width: 850px;
    margin: 0 auto;
}

.about-content p {
    font-size: 1.1rem;
    line-height: 1.9;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

/* ===== Connect Section ===== */
.connect-section {
    background-color: var(--color-soft-white);
}

.social-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
    margin: 0 auto var(--spacing-xl);
    max-width: 1000px;
}

.social-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.social-card:hover {
    border-color: var(--color-sage);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.social-card svg {
    flex-shrink: 0;
    color: var(--color-sage-dark);
}

.social-card span {
    font-weight: 500;
    font-size: 1rem;
}

/* ===== Contact Direct ===== */
.contact-direct {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    background-color: var(--color-cream);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
}

.contact-direct h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.contact-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.contact-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: var(--transition);
    color: var(--color-soft-white);
}

.contact-btn.whatsapp {
    background-color: #25d366;
}

.contact-btn.whatsapp:hover {
    background-color: #20ba5a;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.contact-btn.phone {
    background-color: var(--color-sage);
}

.contact-btn.phone:hover {
    background-color: var(--color-sage-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.contact-btn svg {
    flex-shrink: 0;
}

/* ===== Footer ===== */
footer {
    background-color: var(--color-warm-gray-dark);
    color: var(--color-soft-white);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

footer p {
    margin-bottom: var(--spacing-xs);
    opacity: 0.95;
}

.footer-note {
    font-size: 0.95rem;
    opacity: 0.8;
    font-style: italic;
}

/* ===== Responsive Design ===== */

/* Tablet and up (768px) */
@media (min-width: 768px) {
    html {
        font-size: 17px;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-grid {
        grid-template-columns: 45% 1fr;
        gap: var(--spacing-xl);
    }
    
    .hero-image {
        max-width: none;
    }
    
    .hero-content {
        max-width: none;
    }
    
    .book-content-grid {
        grid-template-columns: 280px 1fr;
        gap: var(--spacing-lg);
    }
    
    .book-cover {
        max-width: none;
    }
    
    .contact-options {
        flex-direction: row;
        justify-content: center;
    }
}

/* Desktop and up (1024px) */
@media (min-width: 1024px) {
    html {
        font-size: 18px;
    }
    
    :root {
        --spacing-xl: 5rem;
    }
    
    .hero-section {
        min-height: 95vh;
    }
    
    .hero-grid {
        grid-template-columns: 40% 1fr;
        gap: 4rem;
    }
    
    .book-content-grid {
        grid-template-columns: 320px 1fr;
        gap: var(--spacing-xl);
    }
    
    .nav-menu {
        gap: var(--spacing-lg);
    }
}

/* Large desktop (1400px and up) */
@media (min-width: 1400px) {
    .hero-grid {
        gap: 5rem;
    }
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

a:focus, button:focus, .btn:focus {
    outline: 3px solid var(--color-sage);
    outline-offset: 3px;
}

a:focus:not(:focus-visible) {
    outline: none;
}

/* ===== Print Styles ===== */
@media print {
    header {
        position: static;
    }
    
    .hero-section {
        min-height: auto;
        padding: var(--spacing-md) 0;
    }
    
    .btn {
        border: 1px solid var(--color-text);
    }
    
    .social-card, .contact-btn {
        page-break-inside: avoid;
    }
}