/* ==========================================================================
   Jaume Ninou — Studio & Author Website Stylesheet
   Theme: Dark Mode Premium Glassmorphism & High Contrast Neon Accents
   ========================================================================== */

:root {
    /* Color Palette */
    --bg-dark: #090b15;
    --bg-card: rgba(22, 27, 46, 0.65);
    --bg-card-hover: rgba(30, 37, 64, 0.85);
    --border-card: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(138, 92, 246, 0.4);

    --primary: #8b5cf6;
    --primary-light: #a78bfa;
    --primary-dark: #6d28d9;
    --accent-amazon: #ff9900;
    --accent-amazon-hover: #ffad33;
    --accent-nabla: #00f2fe;

    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-dark: #1f2937;

    --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --shadow-glow: 0 0 25px rgba(139, 92, 246, 0.35);
}

/* Reset & Basic Setup */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Ambient Glow Background Orbs */
.ambient-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -1;
    pointer-events: none;
    opacity: 0.45;
}

.glow-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.4) 0%, rgba(0,0,0,0) 70%);
    top: -100px;
    left: -100px;
}

.glow-2 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.3) 0%, rgba(0,0,0,0) 70%);
    top: 40%;
    right: -150px;
}

.glow-3 {
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, rgba(255, 153, 0, 0.25) 0%, rgba(0,0,0,0) 70%);
    bottom: 5%;
    left: 10%;
}

/* Typography Utilities */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: #ffffff;
    line-height: 1.2;
}

.gradient-text {
    background: linear-gradient(135deg, #a78bfa 0%, #38bdf8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.gradient-nabla-text {
    background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-full);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.5);
    background: linear-gradient(135deg, #9665fc 0%, #7c3aed 100%);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-main);
    border: 1px solid var(--border-card);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-amazon {
    background: linear-gradient(135deg, var(--accent-amazon) 0%, #e68a00 100%);
    color: #000000;
    font-weight: 700;
    box-shadow: 0 4px 14px rgba(255, 153, 0, 0.3);
}

.btn-amazon:hover {
    background: linear-gradient(135deg, var(--accent-amazon-hover) 0%, var(--accent-amazon) 100%);
    box-shadow: 0 6px 20px rgba(255, 153, 0, 0.5);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary-light);
    color: #ffffff;
}

.btn-glow {
    position: relative;
    overflow: hidden;
}

.btn-glow::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(60deg, transparent, rgba(255,255,255,0.2), transparent);
    transform: rotate(30deg);
    transition: 0.8s;
}

.btn-glow:hover::after {
    left: 100%;
}

.btn-block {
    width: 100%;
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glass);
}

/* Navigation Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(9, 11, 21, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 14px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-light);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.15rem;
    color: #ffffff;
}

.brand-tagline {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);

}

.nav-link:hover {
    color: #ffffff;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

.store-selector {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-card);
    padding: 6px 12px;
    border-radius: var(--radius-full);
}

.store-selector select {
    background: transparent;
    border: none;
    color: var(--text-main);
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    outline: none;
}

.store-selector select option {
    background: var(--bg-dark);
    color: var(--text-main);
}

.lang-selector {
    display: flex;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-full);
    padding: 3px;
}

.lang-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition);
}

.lang-btn.active, .lang-btn:hover {
    background: var(--primary);
    color: #ffffff;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-toggle span {
    width: 24px;
    height: 2px;
    background: #ffffff;
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-nav {
    display: none;
    flex-direction: column;
    background: var(--bg-dark);
    position: fixed;
    top: 73px;
    left: 0;
    width: 100%;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-card);
    gap: 16px;
    z-index: 999;
}

.mobile-nav.open {
    display: flex;
}

.mobile-nav-link {
    color: var(--text-main);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
}

/* Hero Section */
.hero-section {
    padding: 160px 24px 80px;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.4);
    border-radius: var(--radius-full);
    color: var(--primary-light);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-title span {
    display: block;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 36px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.stats-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 20px 32px;
    backdrop-filter: blur(10px);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: #ffffff;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
}

/* Sections Setup */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 24px;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 48px;
}

.section-tag {
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 2px;
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: 12px;
    display: block;
}

.section-title {
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 14px;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* Filter Pills */
.filter-pills {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 28px;
    flex-wrap: wrap;
}

.filter-btn {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-card);
    color: var(--text-muted);
    padding: 8px 18px;
    border-radius: var(--radius-full);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn.active, .filter-btn:hover {
    background: var(--primary);
    border-color: var(--primary-light);
    color: #ffffff;
}

/* Books Grid */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 32px;
}

.book-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    backdrop-filter: blur(12px);
    position: relative;
}

.book-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-glow);
    box-shadow: 0 16px 36px rgba(139, 92, 246, 0.25);
    background: var(--bg-card-hover);
}

.book-cover-wrapper {
    position: relative;
    width: 100%;
    height: 320px;
    background: radial-gradient(circle at center, rgba(139, 92, 246, 0.08) 0%, rgba(0, 0, 0, 0.4) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow: hidden;
}

.book-cover {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: var(--radius-sm);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
    transition: var(--transition);
}

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

.book-badge {
    position: absolute;
    top: 14px;
    right: 14px;
    background: var(--primary);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
}

.badge-kids {
    background: #06b6d4;
}

.badge-rpg {
    background: #ec4899;
}

.badge-movies {
    background: #eab308;
    color: #000000;
}

.badge-spanish {
    background: #ef4444;
}

.book-content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.book-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.book-category {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--primary-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.book-rating {
    display: flex;
    align-items: center;
    gap: 4px;
}

.stars {
    color: #f59e0b;
    font-size: 0.85rem;
}

.rating-num {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
}

.book-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.book-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 24px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-footer {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* Nabla Showcase Section */
.nabla-section {
    padding-top: 40px;
}

.nabla-showcase {
    padding: 56px;
    position: relative;
    overflow: hidden;
    border-color: rgba(0, 242, 254, 0.2);
}

.nabla-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: center;
}

.nabla-badge {
    background: rgba(0, 242, 254, 0.15);
    border-color: rgba(0, 242, 254, 0.4);
    color: #00f2fe;
}

.nabla-title {
    font-size: 2.6rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.nabla-desc {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 36px;
    line-height: 1.6;
}

.nabla-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 40px;
}

.feature-card {
    display: flex;
    gap: 14px;
    background: rgba(255, 255, 255, 0.03);
    padding: 16px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.feature-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
}

.feature-card h4 {
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.feature-card p {
    font-size: 0.8rem;
    color: var(--text-muted);

}

.nabla-visual {
    position: relative;
    display: flex;
    justify-content: center;
}

.nabla-poster-wrapper {
    position: relative;
    width: 100%;
    max-width: 340px;
}

.nabla-poster {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.nabla-icon-floating {
    position: absolute;
    bottom: -20px;
    left: -20px;
    width: 80px;
    height: 80px;
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    border: 2px solid var(--accent-nabla);
}

/* About Author */
.about-card {
    padding: 56px;
}

.about-grid {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 48px;
    align-items: center;
}

.about-avatar-wrapper {
    position: relative;
    width: 220px;
    height: 220px;
    margin: 0 auto;
}

.about-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    position: relative;
    z-index: 2;
    border: 4px solid var(--bg-dark);
}

.avatar-ring {
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-nabla) 100%);
    z-index: 1;
    filter: blur(8px);
    opacity: 0.7;
}

.about-name {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.about-bio {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 16px;
    line-height: 1.7;
}

/* Contact */
.contact-card {
    max-width: 720px;
    margin: 0 auto;
    padding: 48px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
}

.form-group input, .form-group select, .form-group textarea {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    color: #ffffff;
    font-family: var(--font-body);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--primary-light);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 12px rgba(139, 92, 246, 0.25);
}

.form-group select option {
    background: var(--bg-dark);
    color: var(--text-main);
}

/* Modal Popup */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(10px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

.modal-card {
    max-width: 650px;
    width: 100%;
    padding: 40px;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: var(--transition);
}

.modal-overlay.open .modal-card {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: #ffffff;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.modal-book-grid {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 28px;
    align-items: start;
}

.modal-cover {
    width: 100%;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.modal-title {
    font-size: 1.8rem;
    margin-bottom: 8px;
}

.modal-meta {
    font-size: 0.85rem;
    color: var(--primary-light);
    font-weight: 600;
    margin-bottom: 16px;
}

.modal-text {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 24px;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-card);
    padding: 40px 24px;
    background: rgba(9, 11, 21, 0.9);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: #ffffff;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.5rem;
    }

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

    .nabla-visual {
        order: -1;
    }

    .about-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .stats-bar {
        flex-direction: column;
        gap: 16px;
    }

    .stat-divider {
        width: 60%;
        height: 1px;
    }

    .nabla-features {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .modal-book-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .modal-cover {
        max-width: 180px;
        margin: 0 auto;
    }
}