/* ===== CSS VARIABLES ===== */
:root {
    /* Colors - Light Mode */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    
    /* Brand Colors */
    --blue: #2563eb;
    --cyan: #06b6d4;
    --teal: #14b8a6;
    --purple: #8b5cf6;
    --pink: #ec4899;
    --orange: #f97316;
    --yellow: #eab308;
    --red: #ef4444;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #06b6d4 50%, #14b8a6 100%);
    --gradient-text: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Space Grotesk', var(--font-sans);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
}

/* ===== 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);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-base), color var(--transition-base);
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--blue);
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
}

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

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

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

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

/* ===== NAVIGATION ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    transition: all var(--transition-base);
}

[data-theme="dark"] .nav {
    background: rgba(15, 23, 42, 0.8);
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

.nav.scrolled {
    box-shadow: var(--shadow-lg);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

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

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--blue);
    background: var(--bg-secondary);
}

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

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: none;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    transform: scale(1.05);
}

.theme-toggle .sun-icon {
    display: none;
}

.theme-toggle .moon-icon {
    display: block;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    display: block;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    display: none;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    padding: 8px;
    transition: all var(--transition-fast);
}

.mobile-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.mobile-toggle:hover {
    background: var(--bg-tertiary);
}

/* Mobile Menu */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-primary);
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        box-shadow: var(--shadow-lg);
    }
    
    [data-theme="dark"] .nav-menu {
        border-bottom-color: rgba(255, 255, 255, 0.1);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
}

/* ===== HERO SECTION ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: var(--spacing-2xl) var(--spacing-md);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    z-index: -1;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: blob 7s infinite;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: var(--blue);
    top: -250px;
    left: -250px;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: var(--cyan);
    top: 50%;
    right: -200px;
    animation-delay: 2s;
}

.blob-3 {
    width: 350px;
    height: 350px;
    background: var(--teal);
    bottom: -175px;
    left: 50%;
    animation-delay: 4s;
}

@keyframes blob {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -50px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

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

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.125rem);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
    line-height: 1.8;
}

.hero-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-xl);
    background: white;
    color: var(--blue);
    font-weight: 600;
    font-size: 1.125rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-base);
}

.hero-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.hero-button svg {
    animation: bounce 2s infinite;
}

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

/* ===== SECTIONS ===== */
.section {
    padding: var(--spacing-2xl) 0;
}

.section-alt {
    background: var(--bg-secondary);
}

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

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

.section-intro {
    text-align: center;
    max-width: 900px;
    margin: 0 auto var(--spacing-xl);
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== INTRO SECTION ===== */
.intro {
    padding: var(--spacing-xl) 0;
}

.intro-text {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 900px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ===== FEATURE CARDS ===== */
.feature-card {
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: white;
}

.feature-icon.blue { background: var(--blue); }
.feature-icon.cyan { background: var(--cyan); }
.feature-icon.teal { background: var(--teal); }
.feature-icon.purple { background: var(--purple); }

.feature-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== BLOCKCHAIN CARDS ===== */
.blockchain-card {
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.blockchain-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.blockchain-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-md);
}

.blockchain-icon.orange { background: var(--orange); }
.blockchain-icon.purple { background: var(--purple); }
.blockchain-icon.yellow { background: var(--yellow); }
.blockchain-icon.blue { background: var(--blue); }
.blockchain-icon.pink { background: var(--pink); }
.blockchain-icon.gradient { background: var(--gradient-primary); }

.blockchain-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.blockchain-name {
    font-size: 1.5rem;
}

.blockchain-ticker {
    padding: 4px 12px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
}

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

/* ===== CONSENSUS CARDS ===== */
.consensus-card {
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.consensus-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.consensus-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: white;
}

.consensus-icon.blue { background: var(--blue); }
.consensus-icon.cyan { background: var(--cyan); }
.consensus-icon.purple { background: var(--purple); }
.consensus-icon.teal { background: var(--teal); }

.consensus-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

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

/* ===== EXCHANGE CARDS ===== */
.exchange-card {
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.exchange-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.exchange-badge {
    display: inline-block;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-md);
}

.exchange-badge.blue { background: var(--blue); }
.exchange-badge.purple { background: var(--purple); }
.exchange-badge.gradient { background: var(--gradient-primary); }

.exchange-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.exchange-examples {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
    font-style: italic;
}

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

/* ===== WALLET CARDS ===== */
.wallet-card {
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.wallet-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.wallet-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: white;
}

.wallet-icon.orange { background: var(--orange); }
.wallet-icon.blue { background: var(--blue); }
.wallet-icon.cyan { background: var(--cyan); }
.wallet-icon.purple { background: var(--purple); }

.wallet-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

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

/* ===== DEFI SECTION ===== */
.defi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.defi-card {
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

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

.defi-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.defi-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--spacing-md);
}

.defi-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

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

/* ===== NFT CARDS ===== */
.nft-card {
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
}

.nft-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.nft-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.nft-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.nft-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== DAO CARDS ===== */
.dao-card {
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.dao-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.dao-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: white;
}

.dao-icon.blue { background: var(--blue); }
.dao-icon.cyan { background: var(--cyan); }
.dao-icon.purple { background: var(--purple); }
.dao-icon.teal { background: var(--teal); }

.dao-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.dao-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

.dao-examples {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    text-align: center;
    color: var(--text-secondary);
    line-height: 1.7;
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
}

.timeline-item {
    position: relative;
    padding-left: 80px;
    margin-bottom: var(--spacing-xl);
}

.timeline-marker {
    position: absolute;
    left: 22px;
    top: 8px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--gradient-primary);
    box-shadow: 0 0 0 4px var(--bg-primary), 0 0 0 6px var(--cyan);
}

.timeline-content {
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.timeline-content:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
}

.timeline-year {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.timeline-text {
    color: var(--text-secondary);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .timeline::before {
        left: 15px;
    }
    
    .timeline-item {
        padding-left: 50px;
    }
    
    .timeline-marker {
        left: 7px;
    }
}

/* ===== RISK CARDS ===== */
.risk-card {
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.risk-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.risk-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: white;
}

.risk-icon.red { background: var(--red); }
.risk-icon.orange { background: var(--orange); }
.risk-icon.blue { background: var(--blue); }
.risk-icon.purple { background: var(--purple); }

.risk-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

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

.disclaimer {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(6, 182, 212, 0.1));
    border-left: 4px solid var(--blue);
    border-radius: var(--radius-lg);
}

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

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .footer {
    border-top-color: rgba(255, 255, 255, 0.1);
}

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

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.footer-tagline {
    color: var(--text-secondary);
}

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

.footer-links a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .footer-bottom {
    border-top-color: rgba(255, 255, 255, 0.1);
}

.footer-disclaimer {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.footer-disclaimer strong {
    color: var(--text-primary);
}

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

/* ===== BACK TO TOP BUTTON ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .hero {
        min-height: 80vh;
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .footer-content {
        flex-direction: column;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}