/* ==========================================
   RhineCrime Agency - Elegant Static Website
   ========================================== */

/* CSS Variables - Color Palette from Logo */
:root {
    --color-bg: #0a0a0a;
    --color-bg-secondary: #111111;
    --color-bg-card: #141414;
    --color-bg-elevated: #1a1a1a;
    
    --color-crimson: #8b1a1a;
    --color-crimson-dark: #6b1515;
    --color-crimson-light: #a52a2a;
    --color-crimson-glow: rgba(139, 26, 26, 0.3);
    
    --color-silver: #c4c4c4;
    --color-silver-light: #e0e0e0;
    --color-silver-dark: #888888;
    --color-silver-muted: #666666;
    
    --color-gold: #b8860b;
    --color-gold-light: #daa520;
    
    --font-serif: 'Cormorant Garamond', Georgia, serif;
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 10rem;
    
    --max-width: 1200px;
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
    --transition-slow: 0.6s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-silver);
    line-height: 1.7;
    font-weight: 300;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: 0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

p {
    font-size: 1.05rem;
    letter-spacing: 0.01em;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Section Label */
.section-label {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--color-crimson-light);
    margin-bottom: var(--spacing-sm);
    padding: 0.4rem 1rem;
    border: 1px solid var(--color-crimson);
    border-radius: 2px;
}

.section-title {
    color: var(--color-silver-light);
    margin-bottom: var(--spacing-lg);
}

/* Navigation */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    background: linear-gradient(to bottom, rgba(10, 10, 10, 0.95), transparent);
    backdrop-filter: blur(10px);
    transition: background var(--transition-medium);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.logo-rhine {
    color: var(--color-silver);
}

.logo-crime {
    color: var(--color-crimson);
}

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

.nav-links a {
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    color: var(--color-silver-dark);
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-crimson);
    transition: width var(--transition-medium);
}

.nav-links a:hover {
    color: var(--color-silver-light);
}

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

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--spacing-xxl) var(--spacing-md);
    background: radial-gradient(ellipse at center bottom, var(--color-bg-secondary) 0%, var(--color-bg) 70%);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: 
        linear-gradient(180deg, transparent 0%, rgba(139, 26, 26, 0.03) 50%, transparent 100%),
        url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.logo-container {
    margin-bottom: var(--spacing-lg);
}

.hero-logo {
    max-width: 400px;
    width: 100%;
    margin: 0 auto;
    filter: drop-shadow(0 0 60px var(--color-crimson-glow));
    animation: logoGlow 4s ease-in-out infinite alternate;
}

@keyframes logoGlow {
    from { filter: drop-shadow(0 0 40px var(--color-crimson-glow)); }
    to { filter: drop-shadow(0 0 80px var(--color-crimson-glow)); }
}

.hero-title {
    color: var(--color-silver-light);
    margin-bottom: var(--spacing-md);
    font-style: italic;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-silver);
    margin-bottom: var(--spacing-sm);
}

.hero-tagline {
    font-size: 1rem;
    color: var(--color-silver-dark);
    font-style: italic;
    margin-bottom: var(--spacing-lg);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator span {
    display: block;
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-crimson), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.8); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* Buttons */
.btn {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 1rem 2rem;
    border: 1px solid transparent;
    border-radius: 2px;
    cursor: pointer;
    transition: all var(--transition-medium);
}

.btn-primary {
    background: var(--color-crimson);
    color: var(--color-silver-light);
    border-color: var(--color-crimson);
}

.btn-primary:hover {
    background: var(--color-crimson-light);
    border-color: var(--color-crimson-light);
    box-shadow: 0 0 30px var(--color-crimson-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--color-silver);
    border-color: var(--color-silver-dark);
}

.btn-secondary:hover {
    border-color: var(--color-silver);
    color: var(--color-silver-light);
}

.btn-outline {
    background: transparent;
    color: var(--color-silver);
    border-color: var(--color-silver-muted);
}

.btn-outline:hover {
    border-color: var(--color-crimson);
    color: var(--color-silver-light);
}

.btn-sm {
    padding: 0.75rem 1.5rem;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 1.25rem 3rem;
    font-size: 0.9rem;
}

/* Payment Section */
.payment-section {
    padding: var(--spacing-lg) 0;
    background: var(--color-bg-secondary);
}

.payment-card {
    text-align: center;
    padding: var(--spacing-md);
    border-left: 2px solid var(--color-crimson);
    background: linear-gradient(90deg, rgba(139, 26, 26, 0.05), transparent);
}

.payment-card p {
    color: var(--color-silver-dark);
    max-width: 600px;
    margin: 0 auto;
}

.payment-card strong {
    color: var(--color-gold);
}

/* Series Introduction */
.series-intro {
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

.series-description {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.desc-column {
    padding: var(--spacing-md);
    border-top: 1px solid var(--color-silver-muted);
}

.desc-column p {
    color: var(--color-silver);
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-style: italic;
}

/* Books Section */
.books-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-bg-secondary);
}

/* Featured Book (Available) */
.book-featured {
    background: var(--color-bg-card);
    border: 1px solid rgba(139, 26, 26, 0.3);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.book-featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-crimson), transparent);
}

.book-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.book-status {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    padding: 0.5rem 1rem;
    border-radius: 2px;
}

.book-status.available {
    background: var(--color-crimson);
    color: var(--color-silver-light);
}

.book-status.upcoming {
    background: var(--color-bg-elevated);
    color: var(--color-silver-dark);
    border: 1px solid var(--color-silver-muted);
}

/* Book Cover 3D Effect */
.book-cover-wrapper {
    perspective: 1000px;
}

.book-cover {
    position: relative;
    transform-style: preserve-3d;
    transform: rotateY(-8deg);
    transition: transform var(--transition-medium);
    box-shadow: 
        10px 10px 30px rgba(0, 0, 0, 0.4),
        -2px 0 10px rgba(0, 0, 0, 0.2);
}

.book-cover:hover {
    transform: rotateY(0deg);
}

.book-cover img {
    display: block;
    width: 100%;
    border-radius: 2px 4px 4px 2px;
}

.book-spine {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 15px;
    background: linear-gradient(90deg, #1a1a1a, #2a2a2a);
    transform: rotateY(90deg) translateX(-7.5px);
    transform-origin: left;
}

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

.book-band {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-crimson);
    margin-bottom: var(--spacing-xs);
}

.book-title {
    color: var(--color-silver-light);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.book-price {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--color-gold);
    margin-bottom: var(--spacing-md);
}

.book-excerpt {
    padding: var(--spacing-md);
    background: var(--color-bg);
    border-left: 2px solid var(--color-crimson-dark);
    margin-bottom: var(--spacing-md);
}

.book-excerpt p {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-style: italic;
    color: var(--color-silver);
    line-height: 1.8;
}

.book-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* Upcoming Books Label */
.upcoming-label {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.upcoming-label::before,
.upcoming-label::after {
    content: '';
    position: absolute;
    top: 50%;
    width: calc(50% - 100px);
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-silver-muted));
}

.upcoming-label::before { left: 0; }
.upcoming-label::after { right: 0; background: linear-gradient(90deg, var(--color-silver-muted), transparent); }

.upcoming-label span {
    font-size: 0.8rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-silver-muted);
    background: var(--color-bg-secondary);
    padding: 0 var(--spacing-sm);
}

/* Books Grid (Upcoming) */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.book-upcoming {
    background: var(--color-bg-card);
    border: 1px solid var(--color-bg-elevated);
    padding: var(--spacing-md);
    position: relative;
    transition: border-color var(--transition-medium), transform var(--transition-medium);
}

.book-upcoming:hover {
    border-color: var(--color-silver-muted);
    transform: translateY(-5px);
}

.book-upcoming .book-cover-wrapper {
    max-width: 180px;
    margin: 0 auto var(--spacing-md);
}

.book-upcoming .book-info {
    text-align: center;
    padding-top: 0;
}

.book-upcoming .book-excerpt {
    border-left: none;
    border-top: 1px solid var(--color-bg-elevated);
    background: transparent;
    padding: var(--spacing-sm) 0;
}

.book-upcoming .book-excerpt p {
    font-size: 0.95rem;
}

/* Author Section */
.author-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-bg);
}

.author-layout {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.author-image-wrapper {
    position: relative;
}

.author-image {
    position: relative;
    overflow: hidden;
}

.author-image img {
    filter: grayscale(30%) contrast(1.1);
    transition: filter var(--transition-medium);
}

.author-image:hover img {
    filter: grayscale(0%) contrast(1);
}

.author-image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 50%, rgba(139, 26, 26, 0.2));
    pointer-events: none;
}

.author-name {
    color: var(--color-silver-light);
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: var(--spacing-md);
}

.author-text p {
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-serif);
    font-size: 1.15rem;
}

.author-text em {
    color: var(--color-crimson-light);
}

.author-note {
    font-size: 0.9rem !important;
    color: var(--color-silver-muted) !important;
    font-style: italic;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-bg-elevated);
}

.author-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

/* Contact Section */
.contact-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-bg-secondary);
}

.contact-card {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-bg-elevated);
    position: relative;
}

.contact-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    background: linear-gradient(135deg, var(--color-crimson), transparent 50%);
    z-index: -1;
    opacity: 0.3;
}

.contact-card p {
    margin-bottom: var(--spacing-md);
    color: var(--color-silver-dark);
}

/* Footer */
.main-footer {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    background: var(--color-bg);
    border-top: 1px solid var(--color-bg-elevated);
    text-align: center;
}

.footer-logo {
    max-width: 200px;
    margin: 0 auto var(--spacing-md);
    opacity: 0.7;
}

.footer-links {
    margin-bottom: var(--spacing-md);
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--color-silver-muted);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-crimson-light);
}

.footer-links .divider {
    margin: 0 var(--spacing-sm);
    color: var(--color-silver-muted);
}

.footer-disclaimer {
    font-size: 0.8rem;
    color: var(--color-silver-muted);
    max-width: 700px;
    margin: 0 auto var(--spacing-md);
    line-height: 1.6;
}

.footer-philosophy {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1rem;
    color: var(--color-silver-dark);
    margin-bottom: var(--spacing-sm);
}

.footer-link-more {
    font-size: 0.8rem;
    color: var(--color-crimson);
    letter-spacing: 0.1em;
}

.footer-link-more:hover {
    color: var(--color-crimson-light);
}

/* Responsive Design */
@media (max-width: 900px) {
    .book-layout {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .book-layout .book-cover-wrapper {
        max-width: 250px;
        margin: 0 auto;
    }
    
    .book-layout .book-excerpt {
        border-left: none;
        border-top: 2px solid var(--color-crimson-dark);
    }
    
    .book-actions {
        justify-content: center;
    }
    
    .author-layout {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .author-image-wrapper {
        max-width: 300px;
        margin: 0 auto;
    }
    
    .author-actions {
        justify-content: center;
    }
}

@media (max-width: 600px) {
    .nav-links {
        display: none;
    }
    
    .hero-logo {
        max-width: 280px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        text-align: center;
    }
    
    .books-grid {
        grid-template-columns: 1fr;
    }
}

/* Animations on scroll - add via JS */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}