/* ============================================
   A.M. STERLING BOOKS - MAIN STYLESHEET
   ============================================ */

/* ============================================
   CSS VARIABLES / DESIGN TOKENS
   ============================================ */
:root {
    /* Brand Colors */
    --purple-deep: #1a0a2e;
    --purple-mid: #3d1a5c;
    --magenta: #c41e8a;
    --coral: #ff6b4a;
    --gold: #d4a853;
    --cyan: #00d4ff;
    --green-neon: #39ff14;
    --silver: #c0c0c0;
    
    /* UI Colors */
    --glass-bg: rgba(10, 10, 20, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-hover: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    
    /* Typography */
    --font-display: 'Cinzel', serif;
    --font-body: 'Rajdhani', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: #000005;
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   VIDEO BACKGROUND
   ============================================ */
.video-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.video-background video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at 30% 20%, rgba(0, 100, 180, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(196, 30, 138, 0.1) 0%, transparent 40%),
        linear-gradient(180deg, rgba(0,0,5,0.3) 0%, rgba(0,0,5,0.5) 50%, rgba(0,0,5,0.7) 100%);
    pointer-events: none;
}

/* Fallback background if video doesn't load */
.video-background {
    background: 
        radial-gradient(ellipse at center, #1a0a2e 0%, #0a0a0f 50%, #000005 100%);
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-sm) var(--space-md);
    transition: var(--transition-medium);
}

.nav-container.scrolled {
    background: rgba(5, 5, 15, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

nav {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
}

.logo {
    height: 60px;
    filter: drop-shadow(0 0 10px rgba(196, 30, 138, 0.3));
    transition: var(--transition-medium);
}

.logo:hover {
    filter: drop-shadow(0 0 20px rgba(196, 30, 138, 0.6));
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: var(--space-xs);
}

.nav-link {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-secondary);
    padding: 0.75rem 1.25rem;
    border-radius: 4px;
    transition: var(--transition-medium);
    position: relative;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--magenta), var(--coral));
    transition: var(--transition-medium);
    transform: translateX(-50%);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--glass-hover);
}

.nav-link:hover::before {
    width: 60%;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-medium);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: rgba(5, 5, 15, 0.98);
    backdrop-filter: blur(20px);
    padding: var(--space-md);
    flex-direction: column;
    gap: var(--space-sm);
    z-index: 999;
    transform: translateY(-100%);
    opacity: 0;
    transition: var(--transition-medium);
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
}

.mobile-link {
    font-family: var(--font-display);
    font-size: 1.2rem;
    letter-spacing: 0.1em;
    padding: var(--space-sm);
    border-bottom: 1px solid var(--glass-border);
    transition: var(--transition-fast);
}

.mobile-link:hover {
    color: var(--magenta);
    padding-left: var(--space-md);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--space-xl) var(--space-md) var(--space-lg);
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 900px;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-logo {
    width: 320px;
    max-width: 80vw;
    margin-bottom: var(--space-md);
    animation: logoGlow 4s ease-in-out infinite;
}

@keyframes logoGlow {
    0%, 100% { 
        filter: drop-shadow(0 0 20px rgba(196, 30, 138, 0.4)); 
    }
    50% { 
        filter: drop-shadow(0 0 40px rgba(196, 30, 138, 0.7)) 
               drop-shadow(0 0 60px rgba(212, 168, 83, 0.3)); 
    }
}

.hero-tagline {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 400;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff 0%, var(--silver) 50%, #ffffff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto var(--space-lg);
    line-height: 1.8;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-md);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    animation: bounce 2s ease-in-out infinite;
}

.scroll-indicator span {
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--magenta);
    border-bottom: 2px solid var(--magenta);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ============================================
   GENRE PORTALS
   ============================================ */
.portals-section {
    padding: var(--space-xl) var(--space-md);
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 500;
    letter-spacing: 0.15em;
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 300;
}

.portals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-md);
    max-width: 1400px;
    margin: 0 auto;
}

.portal-card {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: 16px;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition-slow);
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    display: block;
}

.portal-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 
        0 30px 60px -20px rgba(0, 0, 0, 0.7),
        0 0 40px -10px var(--portal-glow-color, rgba(196, 30, 138, 0.3));
    border-color: rgba(255, 255, 255, 0.2);
}

/* Portal color variants */
.portal-card.resonance { --portal-glow-color: rgba(196, 30, 138, 0.4); }
.portal-card.sovereign { --portal-glow-color: rgba(212, 168, 83, 0.4); }
.portal-card.static { --portal-glow-color: rgba(0, 212, 255, 0.4); }
.portal-card.consent { --portal-glow-color: rgba(255, 107, 74, 0.4); }
.portal-card.bluetongue { --portal-glow-color: rgba(100, 149, 237, 0.4); }
.portal-card.nonfiction { --portal-glow-color: rgba(57, 255, 20, 0.4); }

.portal-inner-glow {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity var(--transition-slow);
    pointer-events: none;
}

.portal-card:hover .portal-inner-glow { opacity: 1; }

.resonance .portal-inner-glow { background: radial-gradient(ellipse at center, rgba(196, 30, 138, 0.2) 0%, transparent 70%); }
.sovereign .portal-inner-glow { background: radial-gradient(ellipse at center, rgba(212, 168, 83, 0.2) 0%, transparent 70%); }
.static .portal-inner-glow { background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.2) 0%, transparent 70%); }
.consent .portal-inner-glow { background: radial-gradient(ellipse at center, rgba(255, 107, 74, 0.2) 0%, transparent 70%); }
.bluetongue .portal-inner-glow { background: radial-gradient(ellipse at center, rgba(100, 149, 237, 0.2) 0%, transparent 70%); }
.nonfiction .portal-inner-glow { background: radial-gradient(ellipse at center, rgba(57, 255, 20, 0.2) 0%, transparent 70%); }

.portal-content {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-md);
    z-index: 1;
    background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.7) 100%);
}

.portal-icon {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    font-size: 1.5rem;
    z-index: 2;
}

.portal-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-xs);
}

.portal-series {
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.portal-glow {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    opacity: 0;
    transition: opacity var(--transition-medium);
}

.portal-card:hover .portal-glow { opacity: 1; }

.resonance .portal-glow { background: linear-gradient(90deg, var(--purple-mid), var(--magenta)); }
.sovereign .portal-glow { background: linear-gradient(90deg, var(--gold), #ffd700); }
.static .portal-glow { background: linear-gradient(90deg, var(--cyan), #00ffff); }
.consent .portal-glow { background: linear-gradient(90deg, var(--coral), #ff4444); }
.bluetongue .portal-glow { background: linear-gradient(90deg, #6495ed, #87ceeb); }
.nonfiction .portal-glow { background: linear-gradient(90deg, var(--green-neon), #00ff88); }

/* ============================================
   FEATURED BOOK
   ============================================ */
.featured-section {
    padding: var(--space-xl) var(--space-md);
    position: relative;
    z-index: 1;
}

.featured-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-lg);
    align-items: center;
}

.featured-book-visual {
    position: relative;
    perspective: 1000px;
}

.book-3d {
    position: relative;
    transform-style: preserve-3d;
    transform: rotateY(-15deg) rotateX(5deg);
    transition: transform var(--transition-slow);
}

.book-3d:hover {
    transform: rotateY(-5deg) rotateX(2deg);
}

.book-cover {
    width: 100%;
    max-width: 350px;
    border-radius: 8px;
    box-shadow: 
        20px 20px 60px rgba(0, 0, 0, 0.5),
        -5px -5px 20px rgba(196, 30, 138, 0.1);
}

.book-glow {
    position: absolute;
    inset: -20px;
    background: radial-gradient(ellipse at center, rgba(196, 30, 138, 0.2) 0%, transparent 70%);
    z-index: -1;
    animation: pulseGlow 4s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

/* ============================================
   GLASS PANELS
   ============================================ */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: var(--space-md);
    position: relative;
    overflow: hidden;
}

.glass-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.featured-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--magenta);
    margin-bottom: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(196, 30, 138, 0.1);
    border: 1px solid rgba(196, 30, 138, 0.3);
    border-radius: 4px;
}

.featured-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
    background: linear-gradient(135deg, #ffffff 0%, var(--silver) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.featured-series {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.featured-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.featured-meta {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.meta-item { text-align: center; }

.meta-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gold);
}

.meta-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

/* ============================================
   BUTTONS
   ============================================ */
.cta-buttons {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.cta-btn {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: var(--space-sm) var(--space-md);
    border-radius: 4px;
    border: none;
    cursor: pointer;
    transition: var(--transition-medium);
    display: inline-block;
}

.cta-primary {
    background: linear-gradient(135deg, var(--magenta), var(--coral));
    color: var(--text-primary);
}

.cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(196, 30, 138, 0.4);
}

.cta-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.cta-secondary:hover {
    background: var(--glass-hover);
    border-color: rgba(255, 255, 255, 0.3);
}

/* ============================================
   AUTHOR SECTION
   ============================================ */
.author-section {
    padding: var(--space-xl) var(--space-md);
    position: relative;
    z-index: 1;
}

.author-container {
    max-width: 1000px;
    margin: 0 auto;
}

.author-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-lg);
    align-items: center;
}

.author-visual {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--purple-mid), var(--magenta));
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
}

.author-visual::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--magenta), var(--coral), var(--gold));
    z-index: -1;
    animation: borderRotate 8s linear infinite;
}

@keyframes borderRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.author-name {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.author-bio {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.author-bio a {
    color: var(--cyan);
    transition: var(--transition-fast);
}

.author-bio a:hover {
    color: var(--magenta);
}

/* ============================================
   NEWSLETTER
   ============================================ */
.newsletter-section {
    padding: var(--space-xl) var(--space-md);
    position: relative;
    z-index: 1;
}

.newsletter-container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.newsletter-title {
    font-family: var(--font-display);
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.newsletter-subtitle {
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.newsletter-form {
    display: flex;
    gap: var(--space-sm);
}

.newsletter-input {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.newsletter-input:focus {
    outline: none;
    border-color: var(--magenta);
    background: rgba(255, 255, 255, 0.08);
}

.newsletter-input::placeholder {
    color: var(--text-muted);
}

/* ============================================
   FOOTER
   ============================================ */
footer {
    padding: var(--space-lg) var(--space-md) var(--space-md);
    border-top: 1px solid var(--glass-border);
    position: relative;
    z-index: 1;
    background: rgba(0, 0, 5, 0.9);
    backdrop-filter: blur(10px);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.footer-col h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
    color: var(--silver);
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    padding: var(--space-xs) 0;
    transition: var(--transition-fast);
}

.footer-col a:hover {
    color: var(--magenta);
    padding-left: var(--space-xs);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-md);
    border-top: 1px solid var(--glass-border);
}

.footer-logo {
    height: 50px;
    margin-bottom: var(--space-sm);
    opacity: 0.7;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: var(--space-xs);
}

.footer-tagline {
    color: var(--magenta);
    font-style: italic;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 968px) {
    .featured-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .featured-book-visual {
        order: -1;
        margin-bottom: var(--space-md);
    }
    
    .book-3d {
        transform: rotateY(0) rotateX(0);
    }
    
    .book-cover {
        margin: 0 auto;
    }
    
    .author-card {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .author-visual {
        margin: 0 auto var(--space-md);
    }
    
    .cta-buttons,
    .featured-meta {
        justify-content: center;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu {
        display: flex;
    }
    
    .portals-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-logo {
        width: 250px;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    :root {
        --space-md: 1.5rem;
        --space-lg: 3rem;
        --space-xl: 4rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-col a:hover {
        padding-left: 0;
    }
}