:root {
    --color-bg-primary: #0a0e1a;
    --color-bg-secondary: #121826;
    --color-bg-tertiary: #1a2332;
    --color-accent-1: #00d4ff;
    /* -- --color-accent-2: #7b2cbf; */
    --color-accent-2: #31439c;
    --color-accent-3: #ff006e;
    --color-text: #e8edf3;
    --color-text-muted: #8b95a8;
    --color-border: rgba(0, 212, 255, 0.2);
    
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'IBM Plex Sans', sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --glow: 0 0 20px rgba(0, 212, 255, 0.3);
    --glow-strong: 0 0 40px rgba(0, 212, 255, 0.5);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    line-height: 1.7;
    background: var(--color-bg-primary);
    overflow-x: hidden;
    position: relative;
}

/* Starfield Background */
.starfield {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(2px 2px at 20% 30%, white, transparent),
        radial-gradient(2px 2px at 60% 70%, white, transparent),
        radial-gradient(1px 1px at 50% 50%, white, transparent),
        radial-gradient(1px 1px at 80% 10%, white, transparent),
        radial-gradient(2px 2px at 90% 60%, white, transparent),
        radial-gradient(1px 1px at 33% 80%, white, transparent),
        radial-gradient(1px 1px at 15% 60%, white, transparent);
    background-size: 200% 200%;
    background-position: 0% 0%;
    animation: twinkle 100s ease-in-out infinite;
    z-index: 0;
    pointer-events: none;
    opacity: 0.3;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.5; }
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
    z-index: 1;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 14, 26, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
}

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

.brand-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent-1);
    text-shadow: var(--glow);
    letter-spacing: 2px;
}

.brand-subtitle {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-top: -5px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-accent-1);
    margin: 3px 0;
    transition: all 0.3s ease;
    box-shadow: var(--glow);
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-1);
    box-shadow: var(--glow);
    transition: width 0.3s ease;
}

.nav-menu a:hover {
    color: var(--color-accent-1);
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin-top: 70px;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    padding: var(--spacing-lg) var(--spacing-md);
    animation: fadeInUp 1s ease;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--color-accent-1);
    color: var(--color-accent-1);
    font-size: 0.85rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--glow);
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: var(--glow); }
    50% { box-shadow: var(--glow-strong); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 900;
    color: var(--color-text);
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 5px;
}

.glitch {
    position: relative;
    display: inline-block;
    animation: glitchText 5s infinite;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.glitch::before {
    left: 2px;
    text-shadow: -2px 0 var(--color-accent-3);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitchBefore 3s infinite linear alternate-reverse;
}

.glitch::after {
    left: -2px;
    text-shadow: -2px 0 var(--color-accent-1);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitchAfter 5s infinite linear alternate-reverse;
}

@keyframes glitchBefore {
    0% { clip: rect(random(100) + px, 9999px, random(100) + px, 0); }
    100% { clip: rect(random(100) + px, 9999px, random(100) + px, 0); }
}

@keyframes glitchAfter {
    0% { clip: rect(random(100) + px, 9999px, random(100) + px, 0); }
    100% { clip: rect(random(100) + px, 9999px, random(100) + px, 0); }
}

.hero-tagline {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
    letter-spacing: 1px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.stat {
    text-align: center;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-accent-1);
    text-shadow: var(--glow);
    line-height: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 0.5rem;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: transparent;
    color: var(--color-accent-1);
    text-decoration: none;
    font-weight: 500;
    letter-spacing: 2px;
    border: 2px solid var(--color-accent-1);
    transition: all 0.3s ease;
    text-transform: uppercase;
    font-size: 0.9rem;
    position: relative;
    overflow: hidden;
    box-shadow: var(--glow);
}

.btn-primary::before,
.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--color-accent-1);
    transition: left 0.3s ease;
    z-index: -1;
}

.btn-primary:hover,
.btn-secondary:hover {
    color: var(--color-bg-primary);
    box-shadow: var(--glow-strong);
    transform: translateY(-2px);
}

.btn-primary:hover::before,
.btn-secondary:hover::before {
    left: 0;
}

.btn-arrow,
.btn-secondary svg {
    width: 20px;
    height: 20px;
}

/* Hero Decoration */
.hero-decoration {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    z-index: 0;
    opacity: 0.1;
}

.orbit {
    position: absolute;
    border: 1px solid var(--color-accent-1);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.orbit-1 {
    width: 200px;
    height: 200px;
    top: 50%;
    left: 50%;
    margin: -100px 0 0 -100px;
}

.orbit-2 {
    width: 350px;
    height: 350px;
    top: 50%;
    left: 50%;
    margin: -175px 0 0 -175px;
    animation-duration: 30s;
    animation-direction: reverse;
}

.orbit-3 {
    width: 500px;
    height: 500px;
    top: 50%;
    left: 50%;
    margin: -250px 0 0 -250px;
    animation-duration: 40s;
}

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

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

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

.section-number {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--color-accent-1);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: var(--spacing-xs);
    opacity: 0.7;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 3px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--color-accent-1), transparent);
    box-shadow: var(--glow);
}

/* About Section */
.about {
    background: var(--color-bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-image {
    position: relative;
}

.image-frame-wide {
    width: 100%;
    aspect-ratio: 1/1;
    background: linear-gradient(135deg, var(--color-accent-2) 0%, var(--color-accent-1) 100%);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
    box-shadow: var(--glow-strong);
    border: 2px solid var(--color-accent-1);
}

.image-frame {
    width: 100%;
    aspect-ratio: 3/4;
    background: linear-gradient(135deg, var(--color-accent-2) 0%, var(--color-accent-1) 100%);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
    box-shadow: var(--glow-strong);
    border: 2px solid var(--color-accent-1);
}

.image-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: relative;
    z-index: 1;
}

.placeholder-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--color-text);
    z-index: 1;
}

.image-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.3) 0%, transparent 70%);
    animation: rotate 10s linear infinite;
    pointer-events: none;
}

.about-text {
    background: rgba(26, 35, 50, 0.5);
    padding: var(--spacing-lg);
    border-left: 3px solid var(--color-accent-1);
    box-shadow: var(--glow);
}

.about-text .lead {
    font-size: 1.35rem;
    font-weight: 300;
    color: var(--color-accent-1);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.about-text p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: 1.05rem;
}

.about-signature {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.signature-text {
    font-family: var(--font-display);
    color: var(--color-accent-1);
    font-size: 1.1rem;
    letter-spacing: 2px;
}

/* Books Section */
.books {
    background: var(--color-bg-primary);
}

.books-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

.book-categories {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.category-btn {
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-family: var(--font-display);
    font-size: 0.85rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s ease;
}

.category-btn:hover,
.category-btn.active {
    background: var(--color-accent-1);
    color: var(--color-bg-primary);
    border-color: var(--color-accent-1);
    box-shadow: var(--glow);
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.book-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.book-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--glow-strong);
    border-color: var(--color-accent-1);
}

.book-cover {
    width: 100%;
    aspect-ratio: 2/3;
    background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg-secondary) 100%);
    overflow: hidden;
    position: relative;
    border-bottom: 2px solid var(--color-border);
}

.book-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.placeholder-icon {
    font-size: 4rem;
    opacity: 0.3;
}

.placeholder-title {
    font-family: var(--font-display);
    color: var(--color-text-muted);
    font-size: 1rem;
    letter-spacing: 2px;
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-info {
    padding: var(--spacing-md);
}

.book-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 1px;
}

.book-description {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.book-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-accent-1);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.book-link svg {
    width: 16px;
    height: 16px;
    transition: transform 0.3s ease;
}

.book-link:hover {
    text-shadow: var(--glow);
}

.book-link:hover svg {
    transform: translateX(3px);
}

.books-note {
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text-muted);
}

/* Contact Section */
.contact {
    background: var(--color-bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.contact-text h3 {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--color-accent-1);
    margin-bottom: var(--spacing-md);
    letter-spacing: 2px;
}

.contact-text > p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    font-size: 1.05rem;
}

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

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    padding: var(--spacing-md);
    background: rgba(26, 35, 50, 0.5);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    border-color: var(--color-accent-1);
    box-shadow: var(--glow);
}

.contact-icon {
    width: 40px;
    height: 40px;
    color: var(--color-accent-1);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 100%;
    height: 100%;
}

.contact-item h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: 0.25rem;
    letter-spacing: 1px;
}

.contact-item a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: var(--color-accent-1);
}

.contact-form-container {
    background: rgba(26, 35, 50, 0.5);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

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

.contact-form input,
.contact-form textarea {
    padding: 1rem;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text);
    transition: all 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-accent-1);
    box-shadow: var(--glow);
}

.contact-form textarea {
    resize: vertical;
    min-height: 150px;
}

.contact-form button {
    cursor: pointer;
    border: none;
    font-family: var(--font-body);
}

/* Footer */
.footer {
    background: var(--color-bg-tertiary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.footer-brand .brand-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent-1);
    letter-spacing: 2px;
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--color-accent-1);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.footer-social a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.95rem;
}

.footer-social a:hover {
    color: var(--color-accent-1);
}

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

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

/* Responsive Design */
@media (max-width: 992px) {
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links,
    .footer-social {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg-primary);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .hero {
        min-height: 80vh;
        margin-top: 60px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .books-grid {
        grid-template-columns: 1fr;
    }
    
    section {
        padding: var(--spacing-lg) 0;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .book-categories {
        flex-direction: column;
    }
}