/* CSS Variables */
:root {
    --primary: 130 100% 50%; /* #00ff41 */
    --primary-dark: 130 80% 40%; /* #00cc34 */
    --secondary: 210 100% 50%; /* #0080ff */
    --background: 220 13% 8%; /* #0f1114 */
    --surface: 220 12% 12%; /* #181b20 */
    --surface-hover: 220 12% 16%; /* #202429 */
    --text-primary: 0 0% 95%; /* #f2f2f2 */
    --text-secondary: 0 0% 70%; /* #b3b3b3 */
    --text-muted: 0 0% 50%; /* #808080 */
    --border: 220 12% 20%; /* #2a2e35 */
    --success: 120 100% 50%; /* #00ff00 */
    --danger: 0 100% 60%; /* #ff3333 */
    --warning: 45 100% 50%; /* #ffaa00 */
    
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --transition: all 0.3s ease;
    --shadow: 0 4px 16px hsla(220, 13%, 8%, 0.4);
    --shadow-lg: 0 8px 32px hsla(220, 13%, 8%, 0.6);
}

/* Light Mode Variables */
[data-theme="light"] {
    --background: 0 0% 98%; /* #fafafa */
    --surface: 0 0% 100%; /* #ffffff */
    --surface-hover: 0 0% 96%; /* #f5f5f5 */
    --text-primary: 0 0% 10%; /* #1a1a1a */
    --text-secondary: 0 0% 40%; /* #666666 */
    --text-muted: 0 0% 60%; /* #999999 */
    --border: 0 0% 90%; /* #e5e5e5 */
    --shadow: 0 4px 16px hsla(0, 0%, 0%, 0.1);
    --shadow-lg: 0 8px 32px hsla(0, 0%, 0%, 0.15);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: hsl(var(--background));
    color: hsl(var(--text-primary));
    line-height: 1.6;
    overflow-x: hidden;
}

/* Loading Screen */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, hsl(var(--background)), hsl(220, 13%, 6%));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: var(--transition);
}

.loader.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loader-content {
    text-align: center;
    animation: fadeInUp 1s ease-out;
}

.logo-container {
    margin-bottom: 2rem;
}

.loader-logo {
    width: 80px;
    height: 80px;
    animation: pulse 2s infinite;
}

.loader-text {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(90deg, hsl(var(--primary)), hsl(var(--secondary)));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 2rem;
}

.loading-bar {
    width: 300px;
    height: 4px;
    background-color: hsl(var(--surface));
    border-radius: 2px;
    margin: 0 auto 1rem;
    overflow: hidden;
}

.loading-progress {
    height: 100%;
    background: linear-gradient(90deg, hsl(var(--primary)), hsl(var(--secondary)));
    width: 0;
    animation: loadingProgress 3s ease-in-out;
}

.loading-status {
    font-size: 1rem;
    color: hsl(var(--text-secondary));
    animation: fadeIn 2s ease-in;
}

/* Main Content */
.main-content {
    transition: var(--transition);
}

.main-content.hidden {
    opacity: 0;
    pointer-events: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.header {
    background-color: hsl(var(--surface));
    border-bottom: 1px solid hsl(var(--border));
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

.brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(90deg, hsl(var(--primary)), hsl(var(--secondary)));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: hsl(var(--text-secondary));
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 0;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: hsl(var(--primary));
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 0;
    right: 0;
    height: 2px;
    background-color: hsl(var(--primary));
}

.nav-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: hsl(var(--text-primary));
    transition: var(--transition);
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: 1px solid hsl(var(--border));
    color: hsl(var(--text-primary));
    border-radius: 50%;
    width: 44px;
    height: 44px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    margin-right: 1rem;
}

.theme-toggle:hover {
    border-color: hsl(var(--primary));
    color: hsl(var(--primary));
    transform: scale(1.05);
}

.theme-toggle i {
    transition: var(--transition);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    border: none;
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, hsl(var(--primary)), hsl(var(--primary-dark)));
    color: hsl(var(--background));
}

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

.btn-outline {
    background: transparent;
    color: hsl(var(--text-primary));
    border: 1px solid hsl(var(--border));
}

.btn-outline:hover {
    border-color: hsl(var(--primary));
    color: hsl(var(--primary));
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* Hero Section */
.hero {
    padding: 6rem 0;
    background: linear-gradient(135deg, hsl(var(--background)), hsl(220, 13%, 6%));
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 25% 25%, hsla(var(--primary), 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 75% 75%, hsla(var(--secondary), 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.gradient-text {
    background: linear-gradient(90deg, hsl(var(--primary)), hsl(var(--secondary)));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: hsl(var(--text-secondary));
    max-width: 600px;
    margin: 0 auto 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    position: relative;
    z-index: 1;
}

.stat-card {
    background-color: hsl(var(--surface));
    border: 1px solid hsl(var(--border));
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: hsl(var(--primary));
    box-shadow: var(--shadow);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: hsl(var(--primary));
    margin-bottom: 0.5rem;
}

.stat-label {
    color: hsl(var(--text-secondary));
    font-size: 0.875rem;
}

/* Market Section */
.market-section {
    padding: 6rem 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
}

.market-controls {
    display: flex;
    gap: 0.5rem;
}

.market-filter {
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid hsl(var(--border));
    color: hsl(var(--text-secondary));
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.market-filter.active,
.market-filter:hover {
    background-color: hsl(var(--primary));
    color: hsl(var(--background));
    border-color: hsl(var(--primary));
}

.market-table-container {
    background-color: hsl(var(--surface));
    border: 1px solid hsl(var(--border));
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.market-table-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr 1fr;
    gap: 1rem;
    padding: 1rem 2rem;
    background-color: hsl(var(--surface-hover));
    border-bottom: 1px solid hsl(var(--border));
    font-weight: 600;
    color: hsl(var(--text-secondary));
}

.market-table-body {
    max-height: 600px;
    overflow-y: auto;
}

.table-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr 1fr;
    gap: 1rem;
    padding: 1rem 2rem;
    border-bottom: 1px solid hsl(var(--border));
    transition: var(--transition);
    cursor: pointer;
}

.table-row:hover {
    background-color: hsl(var(--surface-hover));
}

.table-cell {
    display: flex;
    align-items: center;
}

.coin-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.coin-symbol {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, hsl(var(--primary)), hsl(var(--secondary)));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: hsl(var(--background));
}

.coin-details h4 {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.coin-details span {
    color: hsl(var(--text-muted));
    font-size: 0.875rem;
}

.price-change.positive {
    color: hsl(var(--success));
}

.price-change.negative {
    color: hsl(var(--danger));
}

.trade-btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Featured Coins */
.featured-coins {
    padding: 6rem 0;
    background-color: hsl(var(--surface));
}

/* Deposit Section */
.deposit-section {
    padding: 6rem 0;
    background-color: hsl(var(--background));
}

.section-subtitle {
    color: hsl(var(--text-secondary));
    font-size: 1.125rem;
    margin-top: 0.5rem;
    text-align: center;
}

.deposit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.deposit-card {
    background-color: hsl(var(--surface));
    border: 1px solid hsl(var(--border));
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.deposit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, hsl(var(--primary)), hsl(var(--secondary)));
}

.deposit-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: hsl(var(--primary));
}

.deposit-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.deposit-network {
    background-color: hsl(var(--background));
    color: hsl(var(--primary));
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid hsl(var(--primary));
}

.deposit-address-container {
    margin-bottom: 1.5rem;
}

.deposit-label {
    display: block;
    color: hsl(var(--text-secondary));
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.address-box {
    display: flex;
    align-items: center;
    background-color: hsl(var(--background));
    border: 1px solid hsl(var(--border));
    border-radius: var(--border-radius);
    padding: 1rem;
    gap: 0.75rem;
}

.deposit-address {
    flex: 1;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    color: hsl(var(--text-primary));
    word-break: break-all;
    line-height: 1.4;
}

.copy-btn {
    background-color: hsl(var(--primary));
    color: hsl(var(--background));
    border: none;
    border-radius: var(--border-radius);
    padding: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
}

.copy-btn:hover {
    background-color: hsl(var(--primary-dark));
    transform: scale(1.05);
}

.copy-btn.copied {
    background-color: hsl(var(--success));
}

.deposit-warning {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    background-color: hsl(var(--warning), 0.1);
    border: 1px solid hsl(var(--warning));
    border-radius: var(--border-radius);
    padding: 1rem;
    font-size: 0.875rem;
    color: hsl(var(--text-secondary));
    line-height: 1.5;
}

.deposit-warning i {
    color: hsl(var(--warning));
    margin-top: 0.125rem;
    flex-shrink: 0;
}

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

.info-card {
    background-color: hsl(var(--surface));
    border: 1px solid hsl(var(--border));
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    text-align: center;
}

.info-card h4 {
    color: hsl(var(--primary));
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.info-card p {
    color: hsl(var(--text-secondary));
    line-height: 1.6;
}

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

.coin-card {
    background-color: hsl(var(--background));
    border: 1px solid hsl(var(--border));
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.coin-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, hsl(var(--primary)), hsl(var(--secondary)));
}

.coin-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: hsl(var(--primary));
}

.coin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.coin-price {
    font-size: 1.5rem;
    font-weight: 700;
}

.coin-change {
    font-size: 0.875rem;
    font-weight: 500;
}

.coin-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.coin-stat {
    text-align: center;
}

.coin-stat-value {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.coin-stat-label {
    color: hsl(var(--text-muted));
    font-size: 0.75rem;
}

/* Footer */
.footer {
    background-color: hsl(var(--surface));
    border-top: 1px solid hsl(var(--border));
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

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

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

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: hsl(var(--text-secondary));
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid hsl(var(--border));
    flex-wrap: wrap;
    gap: 1rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background-color: hsl(var(--surface-hover));
    color: hsl(var(--text-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--transition);
}

.social-link:hover {
    background-color: hsl(var(--primary));
    color: hsl(var(--background));
    transform: translateY(-2px);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    transition: var(--transition);
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: hsla(var(--background), 0.8);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: hsl(var(--surface));
    border: 1px solid hsl(var(--border));
    border-radius: var(--border-radius-lg);
    max-width: 500px;
    width: 100%;
    position: relative;
    z-index: 1;
    animation: scaleIn 0.3s ease-out;
}

.modal-header {
    padding: 2rem 2rem 1rem;
    border-bottom: 1px solid hsl(var(--border));
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: hsl(var(--text-secondary));
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

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

.modal-body {
    padding: 2rem;
}

.wallet-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.wallet-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background-color: hsl(var(--background));
    border: 1px solid hsl(var(--border));
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
    width: 100%;
}

.wallet-option:hover {
    border-color: hsl(var(--primary));
    background-color: hsl(var(--surface-hover));
}

.wallet-icon {
    font-size: 2rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: hsl(var(--surface));
    border-radius: var(--border-radius);
}

.wallet-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.wallet-description {
    color: hsl(var(--text-secondary));
    font-size: 0.875rem;
}

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

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

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes loadingProgress {
    0% { width: 0; }
    100% { width: 100%; }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .navbar {
        padding: 1rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: 1rem;
        margin-right: 0.5rem;
    }
    
    .hero {
        padding: 4rem 0;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .market-table-header,
    .table-row {
        grid-template-columns: 2fr 1fr 1fr;
        font-size: 0.875rem;
    }
    
    .table-cell:nth-child(4),
    .table-cell:nth-child(5) {
        display: none;
    }
    
    .coins-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .modal {
        padding: 1rem;
    }
    
    .modal-header,
    .modal-body {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .loader-text {
        font-size: 2rem;
    }
    
    .loading-bar {
        width: 250px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .stat-card {
        padding: 1.5rem;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
}