/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #0a0a0a;
    --color-secondary: #1a1a1a;
    --color-accent: #2a2a2a;
    --color-text-primary: #e8e8e8;
    --color-text-secondary: #b0b0b0;
    --color-text-muted: #707070;
    --color-border: #2a2a2a;
    --color-highlight: #ffffff;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text-primary);
    background-color: var(--color-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

.nav-content {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    padding: 0 var(--spacing-md);
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    transition: var(--transition);
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-link:hover {
    color: var(--color-highlight);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-highlight);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: #0a0a0a;
    padding-top: 60px; /* Space for fixed navbar */
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #0a0a0a;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    max-width: 1400px;
    padding: var(--spacing-lg) 0;
}

.hero-cover {
    display: flex;
    justify-content: center;
    align-items: center;
}

.cover-image {
    max-width: 100%;
    height: auto;
    max-height: 600px;
    object-fit: contain;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.5));
    border-radius: 4px;
}

.hero-text {
    text-align: left;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-highlight);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

.hero-release-date {
    margin: var(--spacing-md) 0 var(--spacing-lg) 0;
    padding: var(--spacing-sm) var(--spacing-md);
    border-left: 3px solid #FF9900;
    background-color: rgba(255, 153, 0, 0.05);
}

.release-date-text {
    font-size: clamp(1rem, 1.3vw, 1.125rem);
    color: var(--color-text-primary);
    font-weight: 400;
    line-height: 1.6;
}

.release-date-text strong {
    color: #FF9900;
    font-weight: 600;
}

.hero-description {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg) auto;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    max-width: 700px;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    font-family: var(--font-primary);
    text-decoration: none;
    text-align: center;
    border-radius: 0;
    transition: var(--transition);
    letter-spacing: -0.01em;
    cursor: pointer;
    border: none;
}

.cta-primary {
    background-color: var(--color-highlight);
    color: var(--color-primary);
    border: 1px solid var(--color-highlight);
}

.cta-primary:hover {
    background-color: var(--color-text-primary);
    border-color: var(--color-text-primary);
    transform: translateY(-2px);
}

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

.cta-secondary:hover {
    background-color: var(--color-highlight);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.cta-amazon {
    background-color: #FF9900;
    color: var(--color-primary);
    border: 1px solid #FF9900;
}

.cta-amazon:hover {
    background-color: #FFB84D;
    border-color: #FFB84D;
    transform: translateY(-2px);
}

.cta-disabled {
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
}

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

.section:nth-child(even) {
    background-color: var(--color-secondary);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
    color: var(--color-highlight);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.01em;
}

.content-text {
    max-width: 800px;
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    line-height: 1.8;
    color: var(--color-text-primary);
}

.content-text p {
    margin-bottom: var(--spacing-md);
}

.content-text p:last-child {
    margin-bottom: 0;
}

.content-text strong {
    color: var(--color-highlight);
    font-weight: 600;
}

.subsection-title {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 600;
    color: var(--color-highlight);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

.subsection-title:first-of-type {
    margin-top: var(--spacing-md);
}

/* Domains Grid */
.domains {
    background-color: var(--color-primary);
}

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

.domain-card {
    padding: var(--spacing-md);
    background-color: var(--color-secondary);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.domain-card:hover {
    border-color: var(--color-text-muted);
    transform: translateY(-2px);
}

.domain-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-highlight);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.domain-text {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

/* Newsletter Section */
.newsletter {
    background: linear-gradient(180deg, var(--color-secondary) 0%, var(--color-primary) 100%);
    padding: var(--spacing-xl) 0;
}

.newsletter-form {
    max-width: 600px;
    margin-top: var(--spacing-lg);
}

.form-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.form-input {
    flex: 1;
    padding: 1rem 1.25rem;
    font-size: 1rem;
    font-family: var(--font-primary);
    background-color: var(--color-accent);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    border-radius: 0;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-text-muted);
    background-color: var(--color-secondary);
}

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

.form-button {
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    font-family: var(--font-primary);
    background-color: var(--color-highlight);
    color: var(--color-primary);
    border: 1px solid var(--color-highlight);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    letter-spacing: -0.01em;
}

.form-button:hover {
    background-color: var(--color-text-primary);
    border-color: var(--color-text-primary);
}

.form-button:active {
    transform: scale(0.98);
}

.form-disclaimer {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-top: var(--spacing-sm);
}

.form-success-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 1rem 1.5rem;
    background-color: rgba(76, 175, 80, 0.1);
    border: 1px solid rgba(76, 175, 80, 0.3);
    border-radius: 4px;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.3s ease-out;
}

.success-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background-color: #4CAF50;
    color: white;
    border-radius: 50%;
    font-size: 14px;
    font-weight: bold;
    flex-shrink: 0;
}

.success-text {
    color: #4CAF50;
    font-size: 1rem;
    font-weight: 500;
}

/* Sticky Newsletter Form */
.sticky-newsletter {
    position: fixed;
    bottom: -100px;
    left: 0;
    right: 0;
    background-color: var(--color-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
    z-index: 999;
    transition: bottom 0.3s ease;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
}

.sticky-newsletter.visible {
    bottom: 0;
}

.sticky-newsletter-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
}

.sticky-newsletter-text {
    font-size: 0.9rem;
    color: var(--color-text-primary);
    white-space: nowrap;
    flex-shrink: 0;
}

.sticky-newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    flex: 1;
    max-width: 500px;
}

.sticky-form-input {
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    font-family: var(--font-primary);
    background-color: var(--color-accent);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    border-radius: 0;
    transition: var(--transition);
}

.sticky-form-input:focus {
    outline: none;
    border-color: var(--color-text-muted);
    background-color: var(--color-secondary);
}

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

.sticky-form-button {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    font-family: var(--font-primary);
    background-color: var(--color-highlight);
    color: var(--color-primary);
    border: 1px solid var(--color-highlight);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.sticky-form-button:hover {
    background-color: var(--color-text-primary);
    border-color: var(--color-text-primary);
}

.sticky-close {
    position: absolute;
    top: -10px;
    right: var(--spacing-md);
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.sticky-close:hover {
    color: var(--color-text-primary);
}

.sticky-success-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem 1rem;
    background-color: rgba(76, 175, 80, 0.1);
    border: 1px solid rgba(76, 175, 80, 0.3);
    border-radius: 4px;
    margin-bottom: var(--spacing-xs);
    animation: fadeInUp 0.3s ease-out;
}

.sticky-success-message .success-icon {
    width: 20px;
    height: 20px;
    font-size: 12px;
}

.sticky-success-message .success-text {
    font-size: 0.9rem;
}

/* Book Section */
.book-content {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.book-cover-wrapper {
    position: sticky;
    top: var(--spacing-lg);
    display: flex;
    justify-content: center;
}

.book-cover-image {
    max-width: 100%;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.5));
    border-radius: 4px;
}

.book-text {
    padding-top: var(--spacing-sm);
}

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

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    align-items: center;
}

.footer-text {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.footer-contact {
    text-align: center;
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.footer-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: var(--transition);
    margin-left: var(--spacing-sm);
}

.footer-link:hover {
    color: var(--color-highlight);
    text-decoration: underline;
}

.footer-date {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-left: var(--spacing-xs);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }

    .hero-text {
        text-align: center;
    }

    .hero-cta {
        align-items: center;
    }

    .cta-button {
        width: 100%;
        max-width: 400px;
    }

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

    .book-cover-wrapper {
        position: relative;
        top: 0;
        max-width: 300px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .nav-content {
        gap: var(--spacing-md);
    }

    .nav-link {
        font-size: 0.875rem;
    }

    .section {
        padding: var(--spacing-lg) 0;
    }

    .hero {
        min-height: 90vh;
    }

    .hero-content {
        gap: var(--spacing-md);
    }

    .hero-release-date {
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .cover-image {
        max-height: 400px;
    }

    .hero-cta {
        gap: var(--spacing-xs);
    }

    .cta-button {
        padding: 0.875rem 1.5rem;
        font-size: 0.9rem;
    }

    .cta-amazon {
        font-size: 0.8rem;
    }

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

    .form-group {
        flex-direction: column;
    }

    .form-button {
        width: 100%;
    }

    .sticky-newsletter-content {
        flex-direction: column;
        gap: var(--spacing-xs);
        padding: var(--spacing-sm);
    }

    .sticky-newsletter-text {
        font-size: 0.8rem;
        white-space: normal;
        text-align: center;
    }

    .sticky-newsletter-form {
        width: 100%;
        max-width: none;
    }

    .sticky-close {
        top: 5px;
        right: 10px;
    }

    .book-cover-wrapper {
        max-width: 250px;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

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

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }
}

/* Smooth Scroll Animation */
@media (prefers-reduced-motion: no-preference) {
    .section {
        animation: fadeInUp 0.6s ease-out;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}