/* 
  Main Stylesheet for CryptoExchange Portal
  Color Scheme:
  - Primary: #2D3436 (charcoal)
  - Secondary: #0984E3 (ocean blue)
  - Background: #FFFFFF (white)
  - Text: #2D3436 (dark grey)
  - Accent: #00B894 (mint)
*/

/* Base Styles & Variables */
:root {
    /* Colors */
    --color-primary: #2D3436;
    --color-secondary: #0984E3;
    --color-background: #FFFFFF;
    --color-text: #2D3436;
    --color-accent: #00B894;
    --color-light-gray: #F2F2F2;
    --color-medium-gray: #DFE6E9;
    --color-dark-gray: #636E72;
    --color-positive: #00B894;
    --color-negative: #D63031;
    --color-warning: #FDCB6E;
    --color-success: #00B894;
    --color-danger: #D63031;
    --color-bg-card: #FFFFFF;
    --color-border: #DFE6E9;
    --color-bg-hover: #F2F2F2;
    --color-text-muted: #636E72;
    --color-bg: #F8F9FA;
    
    /* Dark Theme Colors */
    --color-primary-dark: #EEEEEE;
    --color-secondary-dark: #0984E3;
    --color-background-dark: #1A1D1F;
    --color-text-dark: #EEEEEE;
    --color-accent-dark: #00B894;
    --color-light-gray-dark: #2D3436;
    --color-medium-gray-dark: #252A2D;
    --color-dark-gray-dark: #B2BEC3;
    --color-warning-dark: #FDCB6E;
    --color-success-dark: #00B894;
    --color-danger-dark: #D63031;
    --color-bg-card-dark: #2D3436;
    --color-border-dark: #636E72;
    --color-bg-hover-dark: #636E72;
    --color-text-muted-dark: #B2BEC3;
    --color-bg-dark: #1A1D1F;
    
    /* Spacing */
    --space-unit: 16px;
    --space-xs: calc(0.25 * var(--space-unit));
    --space-s: calc(0.5 * var(--space-unit));
    --space-m: var(--space-unit);
    --space-l: calc(2 * var(--space-unit));
    --space-xl: calc(3 * var(--space-unit));
    --space-xxl: calc(5 * var(--space-unit));
    
    /* Typography */
    --font-primary: 'Open Sans', sans-serif;
    --font-secondary: 'Lato', sans-serif;
    --font-size-base: 16px;
    --font-size-xs: 0.75rem;
    --font-size-s: 0.875rem;
    --font-size-m: 1rem;
    --font-size-l: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-xxl: 2rem;
    --font-size-xxxl: 3rem;
    
    /* Border Radius */
    --border-radius-s: 4px;
    --border-radius-m: 8px;
    --border-radius-l: 16px;
    --border-radius-circle: 50%;
    
    /* Shadows */
    --shadow-light: 0 2px 5px rgba(0,0,0,0.05);
    --shadow-medium: 0 5px 15px rgba(0,0,0,0.1);
    --shadow-heavy: 0 10px 25px rgba(0,0,0,0.15);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* z-index levels */
    --z-index-base: 1;
    --z-index-dropdown: 10;
    --z-index-sticky: 20;
    --z-index-fixed: 30;
    --z-index-modal: 40;
    --z-index-popover: 50;
    --z-index-tooltip: 60;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    color: var(--color-text);
    line-height: 1.6;
    background-color: var(--color-background);
    overflow-x: hidden;
    transition: background-color var(--transition-medium), color var(--transition-medium);
}

body.dark-theme {
    background-color: var(--color-background-dark);
    color: var(--color-text-dark);
    --color-bg-card: var(--color-bg-card-dark);
    --color-border: var(--color-border-dark);
    --color-bg-hover: var(--color-bg-hover-dark);
    --color-text-muted: var(--color-text-muted-dark);
    --color-bg: var(--color-bg-dark);
}

body.dark-theme h1, 
body.dark-theme h2, 
body.dark-theme h3, 
body.dark-theme h4, 
body.dark-theme h5, 
body.dark-theme h6 {
    color: var(--color-primary-dark);
}

body.dark-theme .header,
body.dark-theme .footer {
    background-color: var(--color-light-gray-dark);
}

body.dark-theme .crypto-section,
body.dark-theme .features-section,
body.dark-theme .faq-section {
    background-color: var(--color-medium-gray-dark);
}

body.dark-theme .feature-card,
body.dark-theme .faq-item,
body.dark-theme .info-item,
body.dark-theme .auth-form-container {
    background-color: var(--color-light-gray-dark);
}

body.dark-theme .timeframe,
body.dark-theme .chart {
    background-color: var(--color-medium-gray-dark);
}

body.dark-theme .chart-container {
    background-color: var(--color-medium-gray-dark);
}

body.dark-theme .footer-column a {
    color: rgba(255, 255, 255, 0.7);
}

body.dark-theme .nav-list a {
    color: var(--color-text-dark);
}

body.dark-theme .nav-list a:hover {
    color: var(--color-secondary);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-m);
    color: var(--color-primary);
}

h1 {
    font-size: var(--font-size-xxxl);
}

h2 {
    font-size: var(--font-size-xxl);
}

h3 {
    font-size: var(--font-size-xl);
}

p {
    margin-bottom: var(--space-m);
}

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

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-m);
}

/* Section styles */
section {
    padding: var(--space-xxl) 0;
}

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

.section-header h2 {
    margin-bottom: var(--space-s);
}

.section-header p {
    color: var(--color-dark-gray);
    font-size: var(--font-size-l);
    max-width: 650px;
    margin: 0 auto;
}

/* Buttons */
.btn {
    display: inline-block;
    font-family: var(--font-secondary);
    font-weight: 600;
    font-size: var(--font-size-m);
    text-align: center;
    padding: var(--space-s) var(--space-m);
    border-radius: var(--border-radius-m);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    background-color: #0770c3;
    color: white;
}

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

.btn-secondary:hover {
    background-color: #009d7e;
    color: white;
}

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

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

.btn-large {
    padding: var(--space-m) var(--space-l);
    font-size: var(--font-size-l);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-background);
    box-shadow: var(--shadow-light);
    padding: var(--space-m) 0;
    z-index: var(--z-index-fixed);
}

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

.logo img {
    height: 40px;
}

.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    cursor: pointer;
    font-size: var(--font-size-xl);
    color: var(--color-primary);
}

.navigation {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    gap: var(--space-l);
}

.nav-list a {
    color: var(--color-primary);
    font-weight: 600;
    position: relative;
}

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

.nav-list a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--color-secondary);
    transition: width var(--transition-fast);
}

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

.auth-buttons {
    display: flex;
    gap: var(--space-m);
}

/* Hero Section */
.hero {
    padding-top: calc(80px + var(--space-xxl));
    background: linear-gradient(180deg, var(--color-background) 0%, var(--color-light-gray) 100%);
}

body.dark-theme .hero {
    background: linear-gradient(180deg, var(--color-background-dark) 0%, var(--color-medium-gray-dark) 100%);
}

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

.hero-text h1 {
    margin-bottom: var(--space-l);
    font-size: clamp(var(--font-size-xxl), 5vw, var(--font-size-xxxl));
}

.hero-text p {
    font-size: var(--font-size-l);
    margin-bottom: var(--space-l);
    color: var(--color-dark-gray);
}

.hero-cta {
    display: flex;
    gap: var(--space-m);
    margin-bottom: var(--space-l);
}

.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-l);
}

.stat {
    display: flex;
    flex-direction: column;
}

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

.stat-label {
    font-size: var(--font-size-s);
    color: var(--color-dark-gray);
}

/* Crypto Section */
.crypto-section {
    background-color: var(--color-light-gray);
}

.crypto-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-m);
    margin-bottom: var(--space-l);
}

.crypto-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--color-background);
    padding: var(--space-m);
    border-radius: var(--border-radius-m);
    box-shadow: var(--shadow-light);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    text-decoration: none;
    color: var(--color-text);
}

body.dark-theme .crypto-card {
    background-color: var(--color-light-gray-dark);
    color: var(--color-text-dark);
}

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

.crypto-info {
    display: flex;
    align-items: center;
    gap: var(--space-m);
}

.crypto-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-circle);
    background-color: var(--color-light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-l);
    color: var(--color-secondary);
}

.crypto-name h3 {
    margin-bottom: 0;
    font-size: var(--font-size-m);
}

.crypto-symbol {
    font-size: var(--font-size-xs);
    color: var(--color-dark-gray);
}

.crypto-price {
    text-align: right;
}

.price {
    display: block;
    font-weight: 700;
    margin-bottom: 2px;
}

.change {
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: 2px 6px;
    border-radius: var(--border-radius-s);
}

.positive {
    background-color: rgba(0, 184, 148, 0.1);
    color: var(--color-positive);
}

.negative {
    background-color: rgba(214, 48, 49, 0.1);
    color: var(--color-negative);
}

.view-all {
    text-align: center;
    margin-top: var(--space-l);
}

/* Charts Section */
.charts-section {
    background-color: var(--color-background);
}

body.dark-theme .charts-section {
    background-color: var(--color-background-dark);
}

.tabs,
.market-data-tabs {
    display: flex;
    overflow-x: auto;
    gap: var(--space-s);
    margin-bottom: var(--space-m);
    padding-bottom: var(--space-s);
}

.tab,
.market-tab {
    padding: var(--space-s) var(--space-m);
    background-color: var(--color-light-gray);
    border-radius: var(--border-radius-m);
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: background-color var(--transition-fast);
    color: var(--color-text);
    border: none;
}

body.dark-theme .tab,
body.dark-theme .market-tab {
    background-color: var(--color-light-gray-dark);
    color: var(--color-text-dark);
}

.tab-content,
.market-tab-content {
    display: none;
}

.tab-content.active,
.market-tab-content.active {
    display: block;
}

.tab.active,
.market-tab.active {
    background-color: var(--color-secondary);
    color: white;
}

.chart-container {
    background-color: var(--color-light-gray);
    border-radius: var(--border-radius-l);
    padding: var(--space-l);
    margin-bottom: var(--space-l);
}

body.dark-theme .chart-container {
    background-color: var(--color-light-gray-dark);
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-m);
    flex-wrap: wrap;
    gap: var(--space-m);
}

.chart-title h3 {
    margin-bottom: var(--space-xs);
    font-size: var(--font-size-l);
}

.chart-timeframes {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

.timeframe {
    padding: var(--space-xs) var(--space-s);
    background-color: var(--color-background);
    border: none;
    border-radius: var(--border-radius-s);
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    color: var(--color-text);
}

body.dark-theme .timeframe {
    background-color: var(--color-light-gray-dark);
    color: var(--color-text-dark);
}

.timeframe.active {
    background-color: var(--color-secondary);
    color: white;
}

.chart {
    background-color: var(--color-background);
    border-radius: var(--border-radius-m);
    padding: var(--space-m);
    margin-bottom: var(--space-m);
    height: 450px;
    display: flex;
    align-items: center;
    justify-content: center;
}

body.dark-theme .chart {
    background-color: var(--color-background-dark);
}

.tradingview-chart {
    display: block;
    width: 100%;
    height: 450px;
}

.tradingview-widget-container, 
#tradingview_btcusd, 
#tradingview_btcusd_index {
    width: 100% !important;
    height: 100% !important;
}

.chart-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-m);
}

.info-item {
    background-color: var(--color-background);
    padding: var(--space-m);
    border-radius: var(--border-radius-m);
}

body.dark-theme .info-item {
    background-color: var(--color-background-dark);
}

.info-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-dark-gray);
    margin-bottom: 2px;
}

.info-value {
    font-weight: 700;
}

.trading-cta {
    text-align: center;
    margin-top: var(--space-l);
}

/* Features Section */
.features-section {
    background-color: var(--color-light-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-l);
}

.feature-card {
    background-color: var(--color-background);
    padding: var(--space-l);
    border-radius: var(--border-radius-m);
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-m);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--color-secondary);
}

.feature-card h3 {
    margin-bottom: var(--space-s);
}

/* How to Start Section */
.how-to-section {
    background-color: var(--color-background);
}

body.dark-theme .how-to-section {
    background-color: var(--color-background-dark);
}

.steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-l);
    max-width: 800px;
    margin: 0 auto var(--space-xl);
}

.step {
    display: flex;
    gap: var(--space-l);
    position: relative;
}

.step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 50px;
    left: 25px;
    width: 2px;
    height: calc(100% + var(--space-l));
    background-color: var(--color-medium-gray);
    z-index: var(--z-index-base);
}

.step-number {
    width: 50px;
    height: 50px;
    background-color: var(--color-secondary);
    color: white;
    border-radius: var(--border-radius-circle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-l);
    z-index: var(--z-index-dropdown);
}

.step-content {
    flex: 1;
}

.step-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--space-m);
}

.step-content h3 {
    margin-bottom: var(--space-s);
}

.get-started-cta {
    text-align: center;
}

/* FAQ Section */
.faq-section {
    background-color: var(--color-light-gray);
}

.faq-accordion {
    max-width: 800px;
    margin: 0 auto var(--space-xl);
}

.faq-item {
    background-color: var(--color-background);
    border-radius: var(--border-radius-m);
    margin-bottom: var(--space-m);
    overflow: hidden;
    box-shadow: var(--shadow-light);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-m);
    cursor: pointer;
}

.faq-question h3 {
    margin: 0;
    font-size: var(--font-size-m);
}

.faq-toggle {
    color: var(--color-secondary);
    font-size: var(--font-size-l);
    transition: transform var(--transition-fast);
}

.faq-answer {
    padding: 0 var(--space-m) var(--space-m);
    display: none;
}

.faq-item:hover .faq-toggle {
    transform: rotate(45deg);
}

.faq-item:hover .faq-answer {
    display: block;
}

.faq-cta {
    text-align: center;
}

.faq-cta p {
    margin-bottom: var(--space-s);
}

/* Newsletter Section */
.newsletter-section {
    background-color: var(--color-secondary);
    padding: var(--space-xl) 0;
    color: white;
}

.newsletter-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-l);
}

.newsletter-text {
    flex: 1;
    min-width: 280px;
}

.newsletter-text h2 {
    color: white;
    margin-bottom: var(--space-s);
}

.newsletter-form {
    flex: 1;
    min-width: 280px;
}

.form-group {
    display: flex;
    gap: var(--space-s);
    margin-bottom: var(--space-s);
}

.form-group input {
    flex: 1;
    padding: var(--space-m);
    border-radius: var(--border-radius-m);
    border: none;
    font-size: var(--font-size-m);
}

.form-disclaimer {
    font-size: var(--font-size-xs);
    opacity: 0.8;
}

.form-disclaimer a {
    color: white;
    text-decoration: underline;
}

.form-disclaimer a:hover {
    color: var(--color-accent);
}

/* Footer */
.footer {
    background-color: var(--color-primary);
    color: white;
    padding: var(--space-xl) 0 var(--space-m);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-logo img {
    height: 40px;
    margin-bottom: var(--space-m);
}

.footer-tagline {
    margin-bottom: var(--space-m);
    opacity: 0.8;
}

.social-links {
    display: flex;
    gap: var(--space-m);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-circle);
    color: white;
    transition: background-color var(--transition-fast);
}

.social-links a:hover {
    background-color: var(--color-secondary);
}

.footer-column h3 {
    color: white;
    margin-bottom: var(--space-m);
    font-size: var(--font-size-m);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-s);
}

.footer-column a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-m);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    flex-wrap: wrap;
    gap: var(--space-m);
}

.copyright {
    font-size: var(--font-size-s);
    opacity: 0.8;
}

/* Theme Switch */
.theme-toggle {
    margin-right: var(--space-m);
    display: flex;
    align-items: center;
}

.theme-switch {
    display: none;
}

.theme-switch-label {
    width: 44px;
    height: 22px;
    position: relative;
    display: inline-block;
    background-color: var(--color-light-gray);
    border-radius: 11px;
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-fast);
}

body.dark-theme .theme-switch-label {
    background-color: var(--color-medium-gray-dark);
}

.theme-switch-label i {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: var(--font-size-s);
    transition: all var(--transition-fast);
}

.theme-switch-label .fa-sun {
    left: 6px;
    color: #F39C12;
    opacity: 1;
}

.theme-switch-label .fa-moon {
    right: 6px;
    color: #BDC3C7;
    opacity: 0.4;
}

.theme-switch:checked + .theme-switch-label .fa-sun {
    opacity: 0.4;
}

.theme-switch:checked + .theme-switch-label .fa-moon {
    opacity: 1;
    color: #3498DB;
}

.theme-switch-label::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    background-color: white;
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.theme-switch:checked + .theme-switch-label::after {
    transform: translateX(22px);
}

/* Auth Pages */
.auth-section {
    padding-top: calc(80px + var(--space-xl));
    min-height: calc(100vh - 80px - 400px);
    display: flex;
    align-items: center;
    background-color: var(--color-background);
}

body.dark-theme .auth-section {
    background-color: var(--color-background-dark);
}

.auth-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.auth-illustration {
    display: flex;
    justify-content: center;
    align-items: center;
}

.auth-illustration img {
    max-width: 100%;
    height: auto;
}

.auth-form-container {
    background-color: var(--color-background);
    padding: var(--space-xl);
    border-radius: var(--border-radius-l);
    box-shadow: var(--shadow-medium);
    max-width: 450px;
}

.auth-form-header {
    text-align: center;
    margin-bottom: var(--space-l);
}

.auth-form-header h2 {
    margin-bottom: var(--space-xs);
}

.auth-form-header p {
    color: var(--color-dark-gray);
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-group label {
    font-weight: 600;
    font-size: var(--font-size-s);
}

.input-with-icon {
    position: relative;
}

.input-with-icon input {
    width: 100%;
    padding: var(--space-m);
    padding-left: calc(var(--space-m) + 20px);
    border: 1px solid var(--color-medium-gray);
    border-radius: var(--border-radius-m);
    font-size: var(--font-size-m);
    transition: all var(--transition-fast);
}

.input-with-icon input:focus {
    border-color: var(--color-secondary);
    outline: none;
    box-shadow: 0 0 0 2px rgba(9, 132, 227, 0.2);
}

.input-with-icon i {
    position: absolute;
    left: var(--space-m);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-dark-gray);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-s);
}

.remember-me {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.forgot-password {
    color: var(--color-secondary);
}

.forgot-password:hover {
    text-decoration: underline;
}

.btn-block {
    width: 100%;
}

.divider {
    position: relative;
    text-align: center;
    margin: var(--space-m) 0;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background-color: var(--color-medium-gray);
}

.divider span {
    position: relative;
    background-color: var(--color-background);
    padding: 0 var(--space-s);
    font-size: var(--font-size-s);
    color: var(--color-dark-gray);
}

body.dark-theme .divider span {
    background-color: var(--color-light-gray-dark);
}

.social-login {
    display: flex;
    gap: var(--space-m);
}

.social-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-s);
    border-radius: var(--border-radius-m);
    border: 1px solid var(--color-medium-gray);
    background-color: var(--color-background);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.social-btn:hover {
    background-color: var(--color-light-gray);
}

.social-btn.google {
    color: #DB4437;
}

.social-btn.facebook {
    color: #4267B2;
}

.auth-footer {
    text-align: center;
    margin-top: var(--space-l);
    font-size: var(--font-size-s);
}

.auth-footer a {
    font-weight: 600;
}

/* Dashboard Styles */
.dashboard-container {
    display: grid;
    grid-template-columns: 240px 1fr;
    min-height: 100vh;
    background-color: var(--color-background);
    position: relative;
    transition: all var(--transition-medium);
}

body.dark-theme .dashboard-container {
    background-color: var(--color-background-dark);
}

.dashboard-container.sidebar-collapsed {
    grid-template-columns: 60px 1fr;
}

.sidebar {
    background-color: var(--color-light-gray);
    padding: var(--space-m);
    position: fixed;
    width: 240px;
    height: 100%;
    overflow-y: auto;
    transition: all var(--transition-medium);
    z-index: 100;
}

.sidebar-collapsed .sidebar {
    width: 60px;
}

body.dark-theme .sidebar {
    background-color: var(--color-light-gray-dark);
}

.sidebar-header {
    padding: var(--space-m) 0;
    margin-bottom: var(--space-m);
    border-bottom: 1px solid var(--color-medium-gray);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

body.dark-theme .sidebar-header {
    border-bottom-color: var(--color-medium-gray-dark);
}

.sidebar-collapsed .sidebar-header {
    justify-content: center;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--space-s);
    transition: all var(--transition-medium);
}

.sidebar-collapsed .user-details,
.sidebar-collapsed .nav-item span {
    display: none;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-circle);
    overflow: hidden;
    background-color: var(--color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: var(--font-size-m);
}

.user-name {
    font-weight: 600;
}

.sidebar-toggle {
    background: none;
    border: none;
    font-size: var(--font-size-l);
    color: var(--color-dark-gray);
    cursor: pointer;
    transition: transform 0.3s ease;
}

.sidebar-collapsed .sidebar-toggle {
    transform: rotate(180deg);
}

body.dark-theme .sidebar-toggle {
    color: var(--color-dark-gray-dark);
}

.nav-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.nav-item a {
    display: flex;
    align-items: center;
    gap: var(--space-s);
    padding: var(--space-s) var(--space-m);
    color: var(--color-text);
    text-decoration: none;
    border-radius: var(--border-radius-m);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.sidebar-collapsed .nav-item a {
    justify-content: center;
    padding: var(--space-s);
}

.sidebar-collapsed .nav-item i {
    margin: 0;
    font-size: 1.2rem;
}

.nav-item a:hover {
    background-color: var(--color-medium-gray);
}

body.dark-theme .nav-item a:hover {
    background-color: var(--color-medium-gray-dark);
}

.nav-item.active a {
    background-color: var(--color-secondary);
    color: white;
}

.nav-item i {
    width: 20px;
    text-align: center;
}

.main-content {
    grid-column: 2;
    padding: var(--space-l);
    background-color: var(--color-background);
}

body.dark-theme .main-content {
    background-color: var(--color-background-dark);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-l);
}

.page-title {
    margin-bottom: 0;
}

.dashboard-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-m);
    margin-bottom: var(--space-l);
}

.dashboard-card {
    background-color: var(--color-background);
    border-radius: var(--border-radius-m);
    padding: var(--space-l);
    box-shadow: var(--shadow-light);
    display: flex;
    flex-direction: column;
}

body.dark-theme .dashboard-card {
    background-color: var(--color-light-gray-dark);
}

.card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-circle);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-s);
    font-size: var(--font-size-l);
}

.card-icon.primary {
    background-color: rgba(9, 132, 227, 0.1);
    color: var(--color-secondary);
}

.card-icon.success {
    background-color: rgba(0, 184, 148, 0.1);
    color: var(--color-accent);
}

.card-icon.warning {
    background-color: rgba(253, 203, 110, 0.1);
    color: #FDCB6E;
}

.card-icon.danger {
    background-color: rgba(214, 48, 49, 0.1);
    color: var(--color-negative);
}

.card-label {
    font-size: var(--font-size-s);
    color: var(--color-dark-gray);
    margin-bottom: var(--space-xs);
}

body.dark-theme .card-label {
    color: var(--color-dark-gray-dark);
}

.card-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.card-change {
    font-size: var(--font-size-xs);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Transaction Section */
.transaction-section {
    margin-bottom: var(--space-l);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-m);
}

.transaction-table {
    width: 100%;
    border-collapse: collapse;
}

.transaction-table th {
    text-align: left;
    padding: var(--space-s) var(--space-m);
    background-color: var(--color-light-gray);
    color: var(--color-dark-gray);
    font-weight: 600;
    font-size: var(--font-size-s);
}

body.dark-theme .transaction-table th {
    background-color: var(--color-medium-gray-dark);
    color: var(--color-dark-gray-dark);
}

.transaction-table td {
    padding: var(--space-s) var(--space-m);
    border-bottom: 1px solid var(--color-light-gray);
}

body.dark-theme .transaction-table td {
    border-bottom-color: var(--color-medium-gray-dark);
}

.transaction-table tr:hover td {
    background-color: var(--color-light-gray);
}

body.dark-theme .transaction-table tr:hover td {
    background-color: var(--color-medium-gray-dark);
}

.transaction-id {
    font-size: var(--font-size-xs);
    color: var(--color-dark-gray);
}

body.dark-theme .transaction-id {
    color: var(--color-dark-gray-dark);
}

.transaction-type {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.transaction-type.buy {
    background-color: rgba(0, 184, 148, 0.1);
    color: var(--color-accent);
}

.transaction-type.sell {
    background-color: rgba(214, 48, 49, 0.1);
    color: var(--color-negative);
}

.transaction-type.transfer {
    background-color: rgba(9, 132, 227, 0.1);
    color: var(--color-secondary);
}

.transaction-amount {
    font-weight: 600;
}

.transaction-status {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.transaction-status.completed {
    background-color: rgba(0, 184, 148, 0.1);
    color: var(--color-accent);
}

.transaction-status.pending {
    background-color: rgba(253, 203, 110, 0.1);
    color: #FDCB6E;
}

.transaction-status.failed {
    background-color: rgba(214, 48, 49, 0.1);
    color: var(--color-negative);
}

/* Trading Page */
.trading-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-l);
    background-color: var(--color-background);
    border-radius: var(--border-radius-m);
    box-shadow: var(--shadow-light);
    padding: var(--space-m);
    margin-bottom: var(--space-xl);
}

body.dark-theme .trading-container {
    background-color: var(--color-background-dark);
    box-shadow: var(--shadow-dark);
}

.chart-area {
    background-color: var(--color-light-gray);
    border-radius: var(--border-radius-m);
    padding: var(--space-m);
}

body.dark-theme .chart-area {
    background-color: var(--color-medium-gray-dark);
}

/* Market Data Tabs */
.market-data-tabs {
    display: flex;
    overflow-x: auto;
    margin-top: var(--space-s);
    margin-bottom: var(--space-m);
    border-bottom: 1px solid var(--color-medium-gray);
    padding-bottom: var(--space-xs);
}

.depth-controls {
    display: flex;
    justify-content: flex-end;
    margin-bottom: var(--space-s);
}

body.dark-theme .market-data-tabs {
    border-bottom-color: var(--color-medium-gray-dark);
}

.trading-pairs {
    display: flex;
    gap: var(--space-s);
    margin-bottom: var(--space-m);
    overflow-x: auto;
    padding-bottom: var(--space-xs);
}

.trading-pair {
    padding: var(--space-s) var(--space-m);
    border-radius: var(--border-radius-m);
    background-color: var(--color-background);
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
}

body.dark-theme .trading-pair {
    background-color: var(--color-light-gray-dark);
}

.trading-pair.active {
    background-color: var(--color-secondary);
    color: white;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-m);
}

.trading-form {
    background-color: var(--color-background);
    border-radius: var(--border-radius-m);
    padding: var(--space-m);
    display: flex;
    flex-direction: column;
    gap: var(--space-m);
}

body.dark-theme .trading-form {
    background-color: var(--color-light-gray-dark);
}

.tab-buttons {
    display: flex;
    gap: 1px;
    margin-bottom: var(--space-m);
    border-radius: var(--border-radius-m);
    overflow: hidden;
}

.tab-button {
    flex: 1;
    padding: var(--space-s) 0;
    text-align: center;
    font-weight: 600;
    cursor: pointer;
    background-color: var(--color-light-gray);
    transition: all var(--transition-fast);
}

body.dark-theme .tab-button {
    background-color: var(--color-medium-gray-dark);
}

.tab-button.buy.active {
    background-color: var(--color-accent);
    color: white;
}

.tab-button.sell.active {
    background-color: var(--color-negative);
    color: white;
}

.range-selector {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-s);
    margin-bottom: var(--space-s);
}

.range-value {
    font-weight: 600;
    font-size: var(--font-size-s);
}

.range-label {
    font-size: var(--font-size-xs);
    color: var(--color-dark-gray);
}

body.dark-theme .range-label {
    color: var(--color-dark-gray-dark);
}

.range-input {
    width: 100%;
    margin: var(--space-s) 0;
}

.quick-select {
    display: flex;
    gap: var(--space-xs);
    margin-bottom: var(--space-m);
}

.quick-select button {
    flex: 1;
    padding: var(--space-xs) 0;
    background-color: var(--color-light-gray);
    border: none;
    border-radius: var(--border-radius-s);
    font-size: var(--font-size-xs);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

body.dark-theme .quick-select button {
    background-color: var(--color-medium-gray-dark);
}

.quick-select button:hover {
    background-color: var(--color-medium-gray);
}

body.dark-theme .quick-select button:hover {
    background-color: var(--color-light-gray-dark);
}

.order-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    padding: var(--space-s);
    background-color: var(--color-light-gray);
    border-radius: var(--border-radius-m);
    margin-bottom: var(--space-m);
}

body.dark-theme .order-details {
    background-color: var(--color-medium-gray-dark);
}

.order-row {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-s);
}

.order-label {
    color: var(--color-dark-gray);
}

body.dark-theme .order-label {
    color: var(--color-dark-gray-dark);
}

.order-value {
    font-weight: 600;
}

.total-row {
    display: flex;
    justify-content: space-between;
    font-weight: 700;
    padding-top: var(--space-xs);
    margin-top: var(--space-xs);
    border-top: 1px solid var(--color-medium-gray);
}

body.dark-theme .total-row {
    border-top-color: var(--color-dark-gray-dark);
}

.buy-button, .sell-button {
    width: 100%;
    padding: var(--space-m);
    border: none;
    border-radius: var(--border-radius-m);
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.buy-button {
    background-color: var(--color-accent);
    color: white;
}

.buy-button:hover {
    background-color: #009d7e;
}

.sell-button {
    background-color: var(--color-negative);
    color: white;
}

.sell-button:hover {
    background-color: #c0392b;
}

.language-selector select {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border: none;
    padding: var(--space-xs) var(--space-s);
    border-radius: var(--border-radius-s);
    font-size: var(--font-size-s);
    cursor: pointer;
}

/* Responsive Styles */
@media (max-width: 992px) {
    h1 {
        font-size: var(--font-size-xxl);
    }
    
    h2 {
        font-size: var(--font-size-xl);
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-l);
    }
    
    .hero-image {
        grid-row: 1;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .hero-text {
        text-align: center;
    }
    
    .hero-cta, .hero-stats {
        justify-content: center;
    }
    
    .chart-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 768px) {
    .nav-toggle-label {
        display: block;
    }
    
    .navigation {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-background);
        box-shadow: var(--shadow-medium);
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-medium);
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
    }
    
    .nav-list li {
        width: 100%;
    }
    
    .nav-list a {
        display: block;
        padding: var(--space-m);
        border-bottom: 1px solid var(--color-light-gray);
    }
    
    .nav-toggle:checked ~ .navigation {
        max-height: 500px;
    }
    
    .auth-buttons {
        display: none;
    }
    
    .nav-toggle:checked ~ .auth-buttons {
        display: flex;
        flex-direction: column;
        width: 100%;
        padding: var(--space-m);
    }
    
    .feature-card {
        padding: var(--space-m);
    }
    
    .step {
        flex-direction: column;
        gap: var(--space-m);
        align-items: center;
        text-align: center;
    }
    
    .step:not(:last-child)::after {
        display: none;
    }
    
    .newsletter-content {
        text-align: center;
    }
    
    .form-group {
        flex-direction: column;
    }
    
    .footer-grid {
        gap: var(--space-l);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}