:root {
    --bg-color: #0B0F19;
    --text-main: #E2E8F0;
    --text-muted: #94A3B8;
    --primary: #00F0FF;
    --secondary: #B026FF;
    --glass-bg: rgba(15, 23, 42, 0.6);
    --glass-border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Background Glow Effect */
.glow-bg {
    position: fixed;
    top: -20%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(176, 38, 255, 0.15) 0%, rgba(11, 15, 25, 0) 70%);
    z-index: -1;
    filter: blur(80px);
}

.glow-bg::after {
    content: '';
    position: absolute;
    top: 40%;
    right: -100%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, rgba(11, 15, 25, 0) 70%);
    filter: blur(80px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

header {
    padding: 20px 0;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--primary);
}

nav a {
    color: var(--text-main);
    text-decoration: none;
    margin-left: 30px;
    font-weight: 600;
    transition: color 0.3s;
}

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

.btn-outline {
    border: 1px solid var(--primary);
    padding: 8px 20px;
    border-radius: 50px;
    color: var(--primary) !important;
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--bg-color) !important;
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
}

/* Hero */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 80vh;
    padding: 80px 24px;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(176, 38, 255, 0.2);
    border: 1px solid var(--secondary);
    border-radius: 50px;
    color: #E2E8F0;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 4rem;
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero h1 span {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 500px;
}

.cta-group {
    display: flex;
    gap: 20px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #FFF;
    text-decoration: none;
    padding: 16px 32px;
    border-radius: 8px;
    font-weight: 800;
    font-size: 1.1rem;
    box-shadow: 0 10px 30px rgba(176, 38, 255, 0.3);
    transition: transform 0.3s, box-shadow 0.3s;
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 240, 255, 0.4);
}

.btn-secondary {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    text-decoration: none;
    padding: 16px 32px;
    border-radius: 8px;
    font-weight: 600;
    transition: background 0.3s;
    text-align: center;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 40px;
}

/* Book Mockup Animation */
.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    perspective: 1000px;
}

.mockup {
    width: 100%;
    max-width: 350px;
    height: 480px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transform: rotateY(-15deg) rotateX(10deg);
    transition: transform 0.5s ease;
}

.mockup:hover {
    transform: rotateY(0deg) rotateX(0deg);
}

.book-stack {
    position: relative;
    width: 200px;
    height: 380px;
}

.book {
    position: absolute;
    width: 260px;
    height: 65px;
    background: linear-gradient(90deg, #1e293b, #334155);
    border: 1px solid #475569;
    border-left: 15px solid var(--primary);
    border-radius: 4px;
    display: flex;
    align-items: center;
    padding-left: 20px;
    font-weight: 800;
    color: #fff;
    box-shadow: -5px 15px 25px rgba(0,0,0,0.6);
    transition: transform 0.3s ease;
}

.b1 { bottom: 0; border-left-color: #3b82f6; z-index: 5; }
.b2 { bottom: 75px; border-left-color: #8b5cf6; z-index: 4; }
.b3 { bottom: 150px; border-left-color: #ec4899; z-index: 3; }
.b4 { bottom: 225px; border-left-color: #f59e0b; z-index: 2; }
.b5 { bottom: 300px; border-left-color: #10b981; z-index: 1; }

.book:hover {
    transform: translateX(20px);
}

/* Volumes Grid */
.volumes {
    padding: 100px 24px;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature h3 {
    margin-bottom: 15px;
    font-size: 1.3rem;
    color: var(--primary);
}

.feature p {
    color: var(--text-muted);
}

.feature.highlighted {
    border-color: var(--secondary);
    box-shadow: 0 0 20px rgba(176, 38, 255, 0.1);
}

/* Pricing */
.pricing {
    padding: 80px 24px 120px;
    display: flex;
    justify-content: center;
}

.pricing-card {
    max-width: 500px;
    width: 100%;
    text-align: center;
    border-color: var(--primary);
    box-shadow: 0 0 40px rgba(0, 240, 255, 0.05);
}

.price {
    font-size: 5rem;
    font-weight: 800;
    margin: 30px 0;
    line-height: 1;
}

.currency {
    font-size: 2rem;
    vertical-align: top;
    color: var(--primary);
}

.cents {
    font-size: 2rem;
}

.original-price {
    font-size: 1.2rem;
    color: var(--text-muted);
    text-decoration: line-through;
    display: block;
    margin-top: 10px;
}

.perks {
    list-style: none;
    text-align: left;
    margin: 40px 0;
}

.perks li {
    margin-bottom: 15px;
    color: var(--text-main);
    font-weight: 600;
}

.block {
    display: block;
    width: 100%;
}

.guarantee {
    margin-top: 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

footer {
    border-top: 1px solid var(--glass-border);
    padding: 40px 0;
    text-align: center;
    color: var(--text-muted);
}

/* Author Section */
.author {
    padding: 60px 24px 0;
}

.author-card {
    display: flex;
    align-items: center;
    gap: 40px;
    border-color: var(--secondary);
    box-shadow: 0 0 30px rgba(176, 38, 255, 0.1);
}

.author-image {
    flex-shrink: 0;
}

.author-image img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
}

.author-bio h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.author-bio p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 15px;
}

@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 40px 24px;
    }
    .hero h1 { font-size: 2.5rem; }
    .cta-group { flex-direction: column; }
    .hero-image { display: none; }
    nav { display: none; }
    
    .author-card {
        flex-direction: column;
        text-align: center;
    }
}