/* ============================================
   BAEZTALES — Global Brand Stylesheet
   ============================================ */

/* --- Color Palette --- */
:root {
    --brand-primary: #2563eb;
    --brand-primary-light: #3b82f6;
    --brand-primary-dark: #1d4ed8;
    --brand-accent: #2563eb;
    --brand-accent-light: #3b82f6;
    --brand-accent-dark: #1d4ed8;
    --brand-purple: #2c2b7e;
    --brand-purple-light: #3f3e9e;
    --brand-purple-dark: #1e1d5c;
    --logo-filter-dark: invert(1) brightness(1.2);
    --logo-blend-dark: screen;
    --logo-blend-light: multiply;
    --brand-bg-light: #ffffff;
    --brand-bg-light-alt: #f8fafc;
    --brand-bg-dark: #020617;
    --brand-bg-dark-alt: #0f172a;
    --brand-surface-light: #ffffff;
    --brand-surface-dark: #0f172a;
    --brand-text-light: #000000;
    --brand-text-muted-light: #475569;
    --brand-text-dark: #f1f5f9;
    --brand-text-muted-dark: #94a3b8;
    --brand-border-light: rgba(37, 99, 235, 0.1);
    --brand-border-dark: rgba(44, 43, 126, 0.3);
    --brand-glow: rgba(37, 99, 235, 0.3);
}

/* --- Base Reset Enhancements --- */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--brand-bg-light);
    color: var(--brand-text-light);
    overflow-x: hidden;
}

html.dark body {
    background: var(--brand-bg-dark);
    color: var(--brand-text-dark);
}

html.dark {
    --brand-bg-light: var(--brand-bg-dark);
    --brand-bg-light-alt: var(--brand-bg-dark-alt);
    --brand-surface-light: var(--brand-surface-dark);
    --brand-text-light: var(--brand-text-dark);
    --brand-text-muted-light: var(--brand-text-muted-dark);
    --brand-border-light: var(--brand-border-dark);
}

/* --- Typography --- */
.font-serif {
    font-family: 'Playfair Display', Georgia, serif;
}

/* --- Grain Texture Overlay --- */
.grain-overlay::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 1;
}

/* --- Floating Particles --- */
.particle {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    animation: floatParticle linear infinite;
    opacity: 0;
}

@keyframes floatParticle {
    0% {
        opacity: 0;
        transform: translateY(0) scale(0);
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateY(-100vh) scale(1);
    }
}

/* --- Scroll Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-60px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(60px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-scale.revealed {
    opacity: 1;
    transform: scale(1);
}

/* Stagger delays */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* --- 3D Book Card Tilt --- */
.book-card-3d {
    perspective: 800px;
    cursor: pointer;
}

.book-card-3d .book-inner {
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    transform-style: preserve-3d;
}

.book-card-3d:hover .book-inner {
    transform: rotateY(-5deg) rotateX(3deg) translateY(-8px);
    box-shadow: 12px 16px 40px rgba(0,0,0,0.2);
}

/* --- Button Styles --- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-primary-dark));
    color: #fff;
    border-radius: 0.75rem;
    font-weight: 700;
    font-size: 0.875rem;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.15) 50%, transparent 60%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.btn-primary:hover::after {
    transform: translateX(100%);
}

.btn-primary:hover {
    box-shadow: 0 6px 30px rgba(37, 99, 235, 0.45);
    transform: translateY(-2px);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border: 2px solid var(--brand-accent);
    color: var(--brand-primary);
    border-radius: 0.75rem;
    font-weight: 700;
    font-size: 0.875rem;
    text-decoration: none;
    transition: all 0.3s ease;
    background: transparent;
    cursor: pointer;
}

html.dark .btn-secondary {
    color: var(--brand-accent);
    border-color: var(--brand-accent-dark);
}

.btn-secondary:hover {
    background: var(--brand-accent);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

/* --- Section Divider --- */
.section-divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(to right, var(--brand-purple), var(--brand-primary));
    border-radius: 4px;
}

/* --- Category Card --- */
.category-card {
    position: relative;
    overflow: hidden;
    border-radius: 1rem;
    padding: 2rem 1.5rem;
    background: var(--brand-surface-light);
    border: 1px solid var(--brand-border-light);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer;
    text-decoration: none;
}

html.dark .category-card {
    background: var(--brand-surface-dark);
    border-color: var(--brand-border-dark);
}

.category-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--brand-purple), var(--brand-primary));
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 0;
}

.category-card:hover::before {
    opacity: 1;
}

.category-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(37, 99, 235, 0.2);
    border-color: transparent;
}

.category-card > * {
    position: relative;
    z-index: 1;
}

.category-card:hover .cat-title,
.category-card:hover .cat-count,
.category-card:hover .cat-icon {
    color: #fff !important;
}

/* --- Stats Counter --- */
.stat-item {
    text-align: center;
    padding: 2rem 1rem;
}

.stat-number {
    font-family: 'Playfair Display', serif;
    font-size: 3rem;
    font-weight: 800;
    color: var(--brand-primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

html.dark .stat-number {
    color: var(--brand-accent);
}

.stat-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--brand-text-muted-light);
}

html.dark .stat-label {
    color: var(--brand-text-muted-dark);
}

/* --- Horizontal Scroll Carousel --- */
.book-carousel {
    display: flex;
    gap: 1.5rem;
    overflow-x: auto;
    padding: 1rem 0 2rem;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.book-carousel::-webkit-scrollbar {
    display: none;
}

.book-carousel .carousel-item {
    scroll-snap-align: start;
    flex: 0 0 auto;
    width: 180px;
}

@media (max-width: 640px) {
    .book-carousel .carousel-item {
        width: 140px;
    }
}

/* --- Bounce Scroll Indicator --- */
.scroll-indicator {
    animation: bounceDown 2s infinite;
}

@keyframes bounceDown {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) translateX(-50%);
    }
    40% {
        transform: translateY(-12px) translateX(-50%);
    }
    60% {
        transform: translateY(-6px) translateX(-50%);
    }
}

/* --- Parallax --- */
.parallax-bg {
    will-change: transform;
    transition: transform 0.1s linear;
}

/* --- Glow Ring for Avatar --- */
.avatar-glow {
    position: relative;
}

.avatar-glow::before {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    background: conic-gradient(
        var(--brand-purple),
        var(--brand-primary),
        var(--brand-purple-light),
        var(--brand-primary),
        var(--brand-purple)
    );
    animation: rotateGlow 6s linear infinite;
    z-index: -1;
}

@keyframes rotateGlow {
    to { transform: rotate(360deg); }
}

/* --- Social Icon --- */
.social-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.7);
    font-size: 0.875rem;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid rgba(255,255,255,0.1);
}

.social-icon:hover {
    background: var(--brand-primary);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
}

/* --- Navbar Transparent Mode --- */
.navbar-transparent {
    background: transparent !important;
    border-bottom: none !important;
    box-shadow: none !important;
}

.navbar-transparent .nav-link {
    color: rgba(255,255,255,0.85) !important;
}

.navbar-transparent .nav-link:hover {
    color: #fff !important;
    background: rgba(255,255,255,0.1) !important;
}

.navbar-transparent .nav-link.active {
    color: var(--brand-accent) !important;
    background: rgba(37, 99, 235, 0.15) !important;
}

.navbar-transparent .nav-brand {
    color: #fff !important;
}

/* --- Navbar Icon Buttons --- */
.nav-icon-btn {
    transition: all 0.3s ease;
}

.navbar-transparent .nav-icon-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
}

.navbar-scrolled .nav-icon-btn {
    background: var(--brand-bg-light-alt);
    border: 1px solid var(--brand-border-light);
    color: var(--brand-text-light);
}

.navbar-scrolled .nav-icon-btn:hover {
    background: var(--brand-border-light);
}

.navbar-transparent .nav-brand-accent {
    color: var(--brand-accent) !important;
}

.navbar-scrolled {
    background: rgba(255, 255, 255, 0.85) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--brand-border-light) !important;
    box-shadow: 0 1px 12px rgba(0,0,0,0.06) !important;
}

.navbar-transparent .logo-brand, .dark-mode-logo { 
    filter: var(--logo-filter-dark); 
    mix-blend-mode: var(--logo-blend-dark); 
}

.navbar-scrolled .logo-brand, .light-mode-logo { 
    mix-blend-mode: var(--logo-blend-light); 
}


html.dark .navbar-scrolled {
    background: rgba(2, 6, 23, 0.95) !important;
    border-bottom: 1px solid var(--brand-border-dark) !important;
}

.navbar-scrolled .nav-link {
    color: var(--brand-text-light) !important;
}

html.dark .navbar-scrolled .nav-link {
    color: var(--brand-text-dark) !important;
}

.navbar-scrolled .nav-link:hover {
    background: rgba(37, 99, 235, 0.08) !important;
    color: var(--brand-primary) !important;
}

html.dark .navbar-scrolled .nav-link:hover {
    background: rgba(44, 43, 126, 0.2) !important;
    color: var(--brand-accent) !important;
}

.navbar-scrolled .nav-brand {
    color: var(--brand-text-light) !important;
}

html.dark .navbar-scrolled .nav-brand {
    color: var(--brand-text-dark) !important;
}

.navbar-scrolled .nav-brand-accent {
    color: var(--brand-primary) !important;
}

html.dark .navbar-scrolled .nav-brand-accent {
    color: var(--brand-accent) !important;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.animate-fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-fade-in {
    animation: fadeIn 1s ease forwards;
}

/* --- Custom Scrollbar --- */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--brand-bg-light);
}

html.dark ::-webkit-scrollbar-track {
    background: var(--brand-bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--brand-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--brand-primary-light);
}

/* --- Logo Processing Utilities --- */
.logo-brand, .light-mode-logo {
    mix-blend-mode: var(--logo-blend-light);
}

html.dark .logo-brand, .dark-mode-logo {
    filter: var(--logo-filter-dark);
    mix-blend-mode: var(--logo-blend-dark);
}

.logo-light-bg {
    mix-blend-mode: multiply;
}

.logo-dark-bg {
    filter: invert(1) brightness(1.2);
    mix-blend-mode: screen;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .stat-number {
        font-size: 2.25rem;
    }
    
    .stat-item {
        padding: 1.25rem 0.75rem;
    }
}

@media (max-width: 480px) {
    .btn-primary, .btn-secondary {
        padding: 0.75rem 1.5rem;
        font-size: 0.813rem;
    }
}