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

:root {
    /* Bitcoin Colors */
    --bitcoin-orange: #f7931a;
    --bitcoin-dark: #000000;
    --bitcoin-light: #ffffff;
    --bitcoin-gold: #ffb700;
    
    /* Theme Colors */
    --primary-color: #f7931a;
    --secondary-color: #ff6b35;
    --accent-color: #1a1a1a;
    --text-color: #333333;
    --text-light: #666666;
    --bg-color: #ffffff;
    --bg-dark: #0a0a0a;
    --bg-section: #f8f9fa;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #f7931a 0%, #ff6b35 100%);
    --gradient-dark: linear-gradient(135deg, #1a1a1a 0%, #333333 100%);
    --gradient-bitcoin: linear-gradient(135deg, #f7931a 0%, #ffb700 50%, #f7931a 100%);
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.2);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Space Mono', 'Courier New', monospace;
    
    /* Spacing */
    --container-max-width: 1200px;
    --section-padding: 80px 0;
    --border-radius: 12px;
    --border-radius-lg: 20px;
    
    /* Animations */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --text-color: #ffffff;
        --text-light: #cccccc;
        --bg-color: #0a0a0a;
        --bg-section: #1a1a1a;
        --accent-color: #ffffff;
    }
}

/* Base Typography */
body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

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

a:hover {
    color: var(--secondary-color);
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(247, 147, 26, 0.1);
    z-index: 1000;
    transition: var(--transition-normal);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo {
    width: 32px;
    height: 32px;
}

.nav-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    color: var(--text-color);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: var(--transition-fast);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
}

.bitcoin-animation {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: var(--gradient-bitcoin);
    border-radius: 50%;
    animation: bitcoinPulse 4s ease-in-out infinite;
}

@keyframes bitcoinPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(0.8); opacity: 0.3; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.1; }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    padding: 2rem;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    color: var(--bitcoin-light);
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #cccccc;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-amount {
    font-weight: 700;
    color: var(--bitcoin-gold);
    font-size: 1.5rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 3rem 0;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--bitcoin-orange);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.9rem;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.btn {
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition-normal);
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-lg);
}

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

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

.btn-secondary:hover {
    background: var(--bitcoin-orange);
    color: white;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: #666;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--bitcoin-orange);
    border-bottom: 2px solid var(--bitcoin-orange);
    transform: rotate(45deg);
    margin: 10px auto;
}

/* Sections */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* Timeline */
.timeline-section {
    padding: var(--section-padding);
    background: var(--bg-section);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin: 3rem 0;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-date {
    flex: 0 0 150px;
    text-align: center;
    font-weight: 700;
    color: var(--bitcoin-orange);
    font-family: var(--font-mono);
    background: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 2;
}

.timeline-content {
    flex: 1;
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    margin: 0 2rem;
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 50%;
    width: 0;
    height: 0;
    border: 15px solid transparent;
}

.timeline-item:nth-child(odd) .timeline-content::before {
    right: -30px;
    border-left-color: white;
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: -30px;
    border-right-color: white;
}

/* Analysis Preview */
.analysis-preview {
    padding: var(--section-padding);
}

.analysis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.analysis-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.analysis-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

.analysis-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.card-link {
    display: inline-block;
    margin-top: 1rem;
    font-weight: 600;
    color: var(--bitcoin-orange);
    transition: var(--transition-fast);
}

.card-link:hover {
    color: var(--secondary-color);
}

/* Key Findings */
.key-findings {
    padding: var(--section-padding);
    background: var(--bg-dark);
    color: white;
}

.key-findings .section-title {
    color: white;
}

.findings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.finding-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(247, 147, 26, 0.2);
}

.finding-number {
    flex: 0 0 60px;
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.finding-content h3 {
    color: var(--bitcoin-gold);
    margin-bottom: 0.5rem;
}

.finding-content p {
    color: #cccccc;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--bitcoin-gold);
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #cccccc;
    transition: var(--transition-fast);
}

.footer-section ul li a:hover {
    color: var(--bitcoin-orange);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #999;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        flex-direction: column;
        align-items: flex-start;
        margin-left: 40px;
    }
    
    .timeline-item:nth-child(odd) {
        flex-direction: column;
    }
    
    .timeline-date {
        margin-bottom: 1rem;
    }
    
    .timeline-content {
        margin: 0;
        width: 100%;
    }
    
    .timeline-content::before {
        display: none;
    }
    
    .analysis-grid {
        grid-template-columns: 1fr;
    }
    
    .findings-grid {
        grid-template-columns: 1fr;
    }
    
    .finding-item {
        flex-direction: column;
        text-align: center;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

/* Print Styles */
@media print {
    .navbar,
    .hero,
    .scroll-indicator,
    .footer {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .section-title {
        font-size: 18pt;
        margin-bottom: 1rem;
    }
}