/* ==========================================
   AUTON Holder Crates - Stylesheet
   ========================================== */

/* ==========================================
   CSS Variables
   ========================================== */
:root {
    /* Colors - Inspired by autonomous agent tech aesthetic */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-tertiary: #1a1a24;
    --color-bg-elevated: #1f1f2e;
    
    --color-text-primary: #e8e8f0;
    --color-text-secondary: #a8a8b8;
    --color-text-tertiary: #7a7a8a;
    
    --color-accent-primary: #00d9ff;
    --color-accent-secondary: #0099ff;
    --color-accent-tertiary: #0066ff;
    
    --color-border: #2a2a38;
    --color-border-hover: #3a3a48;
    
    /* Tier Colors */
    --color-copper: #b87333;
    --color-bronze: #cd7f32;
    --color-silver: #c0c0c0;
    --color-gold: #ffd700;
    --color-platinum: #e5e4e2;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;
    
    /* Effects */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Layout */
    --container-max-width: 1280px;
    --container-padding: 2rem;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================
   Typography
   ========================================== */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 600;
    color: var(--color-text-primary);
}

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

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

a:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
    border-radius: var(--border-radius-sm);
}

button {
    font-family: inherit;
    cursor: pointer;
}

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

/* ==========================================
   Navigation
   ========================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: background-color var(--transition-base);
}

.nav.scrolled {
    background-color: rgba(10, 10, 15, 0.98);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

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

.nav-logo {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-md);
}

.nav-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.nav-project {
    color: var(--color-text-primary);
}

.nav-separator {
    color: var(--color-text-tertiary);
}

.nav-product {
    color: var(--color-accent-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: var(--spacing-xs);
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: all var(--transition-base);
}

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

.nav-link {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav-link-external::after {
    content: '↗';
    margin-left: 0.25rem;
    font-size: 0.875em;
}

.btn-nav {
    padding: 0.625rem 1.25rem !important;
    font-size: var(--font-size-sm) !important;
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--border-radius-md);
    border: none;
    transition: all var(--transition-base);
    cursor: pointer;
    text-decoration: none;
}

.btn:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    color: var(--color-bg-primary);
    box-shadow: 0 0 20px rgba(0, 217, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 30px rgba(0, 217, 255, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
}

.btn-large {
    padding: 1.125rem 2.25rem;
    font-size: var(--font-size-lg);
}

.btn-icon {
    width: 20px;
    height: 20px;
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    padding-bottom: var(--spacing-3xl);
    background: radial-gradient(ellipse at top, rgba(0, 102, 255, 0.1), transparent 50%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-title {
    margin-bottom: var(--spacing-lg);
}

.hero-title-main {
    display: block;
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-text-primary), var(--color-accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title-sub {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-factors {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
}

.factor {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1;
}

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

.factor-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.factor-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.factor-value {
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    font-weight: 600;
}

.factor-operator {
    font-size: var(--font-size-2xl);
    color: var(--color-accent-primary);
    font-weight: 700;
    flex-shrink: 0;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
}

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

.crate-display {
    width: 100%;
    max-width: 500px;
}

.crate-locked {
    background-color: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
}

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

.crate-icon {
    width: 200px;
    height: 200px;
    color: var(--color-accent-primary);
    opacity: 0.8;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

.crate-state {
    margin-bottom: var(--spacing-md);
}

.crate-status {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.crate-tier {
    font-size: var(--font-size-2xl);
    color: var(--color-text-primary);
    font-weight: 700;
    font-family: var(--font-mono);
}

.crate-prompt {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ==========================================
   Stats Bar
   ========================================== */
.stats-bar {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-size: var(--font-size-xl);
    color: var(--color-text-primary);
    font-weight: 700;
    font-family: var(--font-mono);
}

/* ==========================================
   Sections
   ========================================== */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-dark {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.section-intro {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ==========================================
   Process Grid
   ========================================== */
.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-xl);
}

.process-step {
    padding: var(--spacing-xl);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
}

.process-step:hover {
    border-color: var(--color-accent-primary);
    transform: translateY(-4px);
}

.process-number {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-accent-primary);
    background-color: rgba(0, 217, 255, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-md);
}

.process-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.process-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ==========================================
   Preview Section
   ========================================== */
.preview-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.preview-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.control-group {
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
}

.control-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: 600;
}

.control-value {
    font-family: var(--font-mono);
    color: var(--color-accent-primary);
}

.slider {
    width: 100%;
    height: 8px;
    border-radius: var(--border-radius-sm);
    background: var(--color-bg-primary);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0, 217, 255, 0.5);
    transition: all var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
    box-shadow: 0 0 20px rgba(0, 217, 255, 0.8);
}

.slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    cursor: pointer;
    border: none;
    box-shadow: 0 0 10px rgba(0, 217, 255, 0.5);
    transition: all var(--transition-fast);
}

.slider::-moz-range-thumb:hover {
    box-shadow: 0 0 20px rgba(0, 217, 255, 0.8);
}

.slider:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 4px;
}

.control-scale {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    margin-top: var(--spacing-xs);
}

.preview-visual {
    position: sticky;
    top: 100px;
}

.preview-crate {
    background-color: var(--color-bg-elevated);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
}

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

.preview-crate-svg {
    width: 100%;
    max-width: 300px;
    height: auto;
    color: var(--color-accent-primary);
    transition: color var(--transition-base);
}

.preview-crate-svg[data-tier="copper"] {
    color: var(--color-copper);
}

.preview-crate-svg[data-tier="bronze"] {
    color: var(--color-bronze);
}

.preview-crate-svg[data-tier="silver"] {
    color: var(--color-silver);
}

.preview-crate-svg[data-tier="gold"] {
    color: var(--color-gold);
}

.preview-crate-svg[data-tier="platinum"] {
    color: var(--color-platinum);
}

#crateFill {
    transition: height var(--transition-slow), y var(--transition-slow);
}

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

.preview-tier {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-text-primary);
}

.preview-strength {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.preview-strength-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.preview-strength-bar {
    height: 8px;
    background-color: var(--color-bg-primary);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
}

.preview-strength-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    transition: width var(--transition-slow);
}

.preview-disclaimer {
    margin-top: var(--spacing-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    text-align: center;
    font-style: italic;
}

/* ==========================================
   Tiers Grid
   ========================================== */
.tiers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
}

.tier-card {
    background-color: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.tier-card:hover {
    transform: translateY(-4px);
    border-color: currentColor;
}

.tier-card[data-tier="copper"] {
    color: var(--color-copper);
}

.tier-card[data-tier="bronze"] {
    color: var(--color-bronze);
}

.tier-card[data-tier="silver"] {
    color: var(--color-silver);
}

.tier-card[data-tier="gold"] {
    color: var(--color-gold);
}

.tier-card[data-tier="platinum"] {
    color: var(--color-platinum);
}

.tier-badge {
    margin-bottom: var(--spacing-md);
    display: flex;
    justify-content: center;
}

.tier-icon {
    width: 60px;
    height: 60px;
}

.tier-name {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    font-family: var(--font-mono);
    margin-bottom: var(--spacing-sm);
    color: currentColor;
}

.tier-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ==========================================
   Method Section
   ========================================== */
.method-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
    max-width: 900px;
    margin: 0 auto;
}

.method-block {
    padding: var(--spacing-xl);
    background-color: var(--color-bg-elevated);
    border-left: 4px solid var(--color-accent-primary);
    border-radius: var(--border-radius-md);
}

.method-heading {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent-primary);
}

.method-text {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ==========================================
   About Section
   ========================================== */
.about-layout {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-3xl);
}

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

.about-text {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.about-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

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

.detail-card {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    position: relative;
}

.detail-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.detail-value {
    font-size: var(--font-size-lg);
    color: var(--color-text-primary);
    font-weight: 600;
}

.detail-mono {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    word-break: break-all;
}

.detail-copy {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    color: var(--color-text-tertiary);
    padding: var(--spacing-xs);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.detail-copy:hover {
    color: var(--color-accent-primary);
}

.detail-copy:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
    border-radius: var(--border-radius-sm);
}

/* ==========================================
   FAQ Section
   ========================================== */
.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
}

.faq-question {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.faq-answer {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ==========================================
   CTA Section
   ========================================== */
.section-cta {
    background: radial-gradient(ellipse at center, rgba(0, 102, 255, 0.15), transparent 70%);
}

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

.cta-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-2xl) 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-logo {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-md);
}

.footer-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-base);
    font-weight: 600;
}

.footer-separator {
    color: var(--color-text-tertiary);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-disclaimer {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    line-height: 1.6;
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* ==========================================
   Modal
   ========================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.modal-container {
    position: relative;
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    padding: var(--spacing-xs);
    cursor: pointer;
    transition: color var(--transition-fast);
}

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

.modal-close:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
    border-radius: var(--border-radius-sm);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.wallet-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.wallet-option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-md);
    cursor: not-allowed;
    transition: all var(--transition-fast);
}

.wallet-option:hover {
    border-color: var(--color-border-hover);
}

.wallet-name {
    font-weight: 600;
    color: var(--color-text-primary);
}

.wallet-status {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.modal-note {
    background-color: var(--color-bg-primary);
    border-left: 4px solid var(--color-accent-primary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.modal-note strong {
    color: var(--color-text-primary);
}

.modal-note code {
    font-family: var(--font-mono);
    color: var(--color-accent-primary);
    background-color: rgba(0, 217, 255, 0.1);
    padding: 0.125rem 0.375rem;
    border-radius: var(--border-radius-sm);
}

/* ==========================================
   Responsive Design
   ========================================== */

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .hero-visual {
        order: -1;
    }
    
    .preview-container {
        grid-template-columns: 1fr;
    }
    
    .preview-visual {
        position: static;
    }
    
    .about-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1.5rem;
        --font-size-5xl: 2.25rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--color-bg-secondary);
        border-bottom: 1px solid var(--color-border);
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .btn-nav {
        width: 100%;
    }
    
    .hero {
        min-height: auto;
        padding-top: var(--spacing-3xl);
    }
    
    .hero-factors {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .factor-operator {
        transform: rotate(90deg);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-grid {
        grid-template-columns: 1fr;
    }
    
    .tiers-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 1rem;
    }
    
    .nav-container {
        height: 70px;
    }
    
    .nav-logo {
        width: 32px;
        height: 32px;
    }
    
    .nav-title {
        font-size: var(--font-size-base);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   Accessibility
   ========================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus visible styles for keyboard navigation */
a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-border: #4a4a58;
    }
}