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

:root {
    /* Colors */
    --primary: #1a1a2e;
    --secondary: #16213e;
    --accent: #e94560;
    --accent-hover: #d63651;
    --text: #f1f1f1;
    --text-muted: #a0a0a0;
    --bg: #0f0f1e;
    --bg-light: #1a1a2e;
    --bg-card: #16213e;
    --border: #2a2a3e;
    --success: #4caf50;
    --warning: #ff9800;
    
    /* Sale Banner */
    --sale-bg: linear-gradient(135deg, #e94560 0%, #d63651 100%);
    --sale-gold: #ffd700;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-serif: 'Libre Baskerville', Georgia, serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.4);
}

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

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

/* ============================================
   SALE BANNER
   ============================================ */
.sale-banner {
    background: var(--sale-bg);
    color: white;
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
    animation: slideDown 0.5s ease-out;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.sale-content {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    text-align: center;
}

.sale-emoji {
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.sale-text {
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.sale-discount {
    background: var(--sale-gold);
    color: var(--primary);
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    font-weight: 800;
    font-size: 0.9rem;
}

.sale-timer {
    font-weight: 600;
    font-family: monospace;
    font-size: 1rem;
}

.sale-code {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    backdrop-filter: blur(10px);
}

.sale-code strong {
    color: var(--sale-gold);
    font-weight: 700;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    background: var(--bg-light);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 52px;
    z-index: 999;
    backdrop-filter: blur(10px);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.logo-icon {
    font-size: 2rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(233, 69, 96, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    color: var(--accent);
    display: block;
    margin-top: var(--spacing-sm);
}

.hero-quote {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    font-style: italic;
    color: var(--text-muted);
    margin: var(--spacing-lg) 0;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.disclaimer-badge {
    display: inline-block;
    background: var(--warning);
    color: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    font-weight: 700;
    font-size: 0.9rem;
    margin: var(--spacing-md) 0;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.hero-disclaimer {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ============================================
   SECTIONS
   ============================================ */
.book-section,
.membership-section,
.about-section,
.newsletter-section {
    padding: var(--spacing-2xl) 0;
}

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

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

/* ============================================
   BOOK SECTION
   ============================================ */
.book-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.book-cover {
    position: sticky;
    top: 140px;
}

.book-image {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    transition: transform 0.3s ease;
}

.book-image:hover {
    transform: scale(1.02);
}

.book-placeholder {
    aspect-ratio: 2/3;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--secondary) 100%);
    position: relative;
}

.book-icon {
    font-size: 6rem;
}

.book-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--accent);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    font-weight: 700;
    font-size: 0.8rem;
    transform: rotate(10deg);
    box-shadow: var(--shadow-md);
}

.book-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.book-intro {
    font-size: 1.1rem;
    color: var(--text-muted);
    line-height: 1.8;
}

.book-features h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.feature-list li {
    padding-left: var(--spacing-md);
    position: relative;
    font-size: 1.05rem;
}

.feature-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

.feature-list-large li {
    font-size: 1.15rem;
    padding: var(--spacing-sm);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--accent);
}

/* ============================================
   PRICING BOX
   ============================================ */
.pricing-box {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.price {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.price-old {
    font-size: 1.5rem;
    color: var(--text-muted);
    text-decoration: line-through;
}

.price-new {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
}

.price-note {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.disclaimer-small {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    background: rgba(255, 152, 0, 0.1);
    border-radius: var(--radius-sm);
}

/* ============================================
   MEMBERSHIP SECTION
   ============================================ */
.membership-section {
    background: var(--bg-light);
}

.membership-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.membership-features h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
}

.membership-subtext {
    margin-top: var(--spacing-lg);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent);
}

.membership-card {
    position: sticky;
    top: 140px;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

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

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-muted);
}

/* ============================================
   NEWSLETTER SECTION
   ============================================ */
.newsletter-section {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--secondary) 100%);
}

.newsletter-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.newsletter-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    text-align: left;
}

.form-input {
    padding: var(--spacing-md);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
    font-family: var(--font-sans);
    transition: border-color 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
}

.checkbox-group {
    display: flex;
    align-items: start;
}

.checkbox-label {
    display: flex;
    align-items: start;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.checkbox-label input[type="checkbox"] {
    margin-top: 0.2rem;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.raffle-note {
    margin-top: var(--spacing-lg);
    font-size: 0.95rem;
    color: var(--text-muted);
    font-style: italic;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
    padding: var(--spacing-2xl) 0;
    text-align: center;
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-light) 100%);
}

.cta-content h2 {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    margin-bottom: var(--spacing-xl);
}

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

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.9rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--text);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-card);
    border-color: var(--accent);
}

.btn-cta {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    color: white;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn-cta::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.5s, height 0.5s;
}

.btn-cta:hover::before {
    width: 300px;
    height: 300px;
}

.btn-cta:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-light);
    border-top: 1px solid var(--border);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.footer-disclaimer {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
}

.footer-disclaimer h3 {
    color: var(--warning);
    margin-bottom: var(--spacing-sm);
}

.footer-disclaimer p {
    color: var(--text-muted);
    font-size: 0.95rem;
    max-width: 800px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

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

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

.footer-copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ============================================
   MODALS
   ============================================ */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 90%;
    position: relative;
    animation: slideUp 0.3s ease;
    box-shadow: var(--shadow-xl);
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    right: var(--spacing-md);
    top: var(--spacing-md);
    font-size: 2rem;
    font-weight: 300;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.3s ease;
    line-height: 1;
}

.modal-close:hover {
    color: var(--accent);
}

.modal-content h2 {
    margin-bottom: var(--spacing-lg);
    font-family: var(--font-serif);
}

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

.auth-form label {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    display: block;
}

.form-footer {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: var(--spacing-sm);
}

.form-footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}

.form-footer a:hover {
    text-decoration: underline;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 968px) {
    .book-grid,
    .membership-grid {
        grid-template-columns: 1fr;
    }
    
    .book-cover,
    .membership-card {
        position: static;
    }
    
    .sale-content {
        font-size: 0.85rem;
    }
    
    .sale-emoji {
        font-size: 1.2rem;
    }
    
    .navbar {
        top: 70px;
    }
}

@media (max-width: 640px) {
    .nav-links {
        gap: var(--spacing-sm);
    }
    
    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .cta-buttons .btn {
        width: 100%;
    }
    
    .sale-content {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }