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

:root {
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --secondary-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-bg: #1f2937;
    --light-bg: #f9fafb;
    --card-bg: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --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);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--light-bg);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-content {
    text-align: center;
    color: white;
}

.loader {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* App Container */
.app-container {
    display: none;
    min-height: 100vh;
}

/* Navbar */
.navbar {
    background-color: white;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.demo-badge {
    background-color: var(--warning-color);
    color: white;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: 600;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

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

.nav-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.user-details {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.user-balance {
    font-size: 0.8rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.btn-logout {
    background: none;
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.btn-logout:hover {
    background-color: var(--light-bg);
    color: var(--danger-color);
}

/* Main Content */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    min-height: calc(100vh - 70px - 200px);
}

/* Pages */
.page {
    display: none;
    animation: fadeIn 0.5s ease;
}

.page.active {
    display: block;
}

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

/* Home Page */
.hero-section {
    text-align: center;
    padding: 60px 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-lg);
    color: white;
    margin-bottom: 40px;
}

.hero-section h1 {
    font-size: 3rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 40px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 40px 0;
}

.stat-card {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: var(--radius-md);
    min-width: 150px;
    backdrop-filter: blur(10px);
}

.stat-card i {
    font-size: 2rem;
    margin-bottom: 10px;
}

.stat-card h3 {
    font-size: 2rem;
    margin: 10px 0;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}

.btn-primary {
    background-color: white;
    color: var(--primary-color);
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    transition: all 0.3s ease;
}

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

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    transition: all 0.3s ease;
}

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

.btn-large {
    padding: 15px 30px;
    font-size: 1.1rem;
}

/* Features Section */
.features-section {
    margin: 60px 0;
}

.features-section h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 1.8rem;
}

.feature-card h3 {
    margin-bottom: 10px;
    font-size: 1.3rem;
}

/* Disclaimer Section */
.disclaimer-section {
    margin-top: 60px;
}

.disclaimer-card {
    background-color: var(--warning-color);
    color: white;
    padding: 30px;
    border-radius: var(--radius-lg);
    text-align: center;
}

.disclaimer-card i {
    font-size: 3rem;
    margin-bottom: 20px;
}

.disclaimer-card h3 {
    margin-bottom: 15px;
    font-size: 1.8rem;
}

.disclaimer-card ul {
    list-style: none;
    margin-top: 20px;
    text-align: left;
    max-width: 500px;
    margin: 20px auto;
}

.disclaimer-card li {
    margin: 10px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Dashboard Styles */
.page-header {
    margin-bottom: 30px;
}

.page-header h1 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 2rem;
    margin-bottom: 10px;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.balance-card {
    background-color: var(--card-bg);
    padding: 25px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 20px;
}

.bdt-balance {
    border-left: 5px solid var(--primary-color);
}

.usdt-balance {
    border-left: 5px solid var(--secondary-color);
}

.balance-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: white;
}

.bdt-balance .balance-icon {
    background-color: var(--primary-color);
}

.usdt-balance .balance-icon {
    background-color: var(--secondary-color);
}

.balance-info h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.balance-info h2 {
    font-size: 2rem;
    font-weight: 700;
}

.balance-info h2 span {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* Quick Actions */
.quick-actions {
    background-color: var(--card-bg);
    padding: 25px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    grid-column: span 2;
}

.action-buttons {
    display: flex;
    gap: 15px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.action-btn {
    flex: 1;
    min-width: 200px;
    background-color: var(--light-bg);
    border: 2px solid var(--border-color);
    padding: 15px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.action-btn:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Transactions Section */
.transactions-section {
    background-color: var(--card-bg);
    padding: 25px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    grid-column: span 3;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.btn-icon {
    background: none;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.btn-icon:hover {
    background-color: var(--light-bg);
    color: var(--primary-color);
}

.transactions-list {
    min-height: 200px;
}

.no-transactions {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.no-transactions i {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--border-color);
}

.btn-small {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    margin-top: 20px;
}

/* Deposit Page */
.deposit-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
}

.deposit-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.deposit-step {
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 2px dashed var(--border-color);
}

.deposit-step:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    margin-bottom: 15px;
}

.address-display {
    background-color: var(--light-bg);
    padding: 15px;
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 20px 0;
    font-family: monospace;
    font-size: 0.9rem;
    word-break: break-all;
}

.qr-container {
    text-align: center;
    margin: 20px 0;
    padding: 20px;
    background-color: white;
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
}

.address-note {
    background-color: var(--light-bg);
    padding: 10px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Form Styles */
.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.input-with-unit {
    display: flex;
    align-items: center;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.input-with-unit input {
    flex: 1;
    border: none;
    padding: 15px;
    font-size: 1rem;
    font-family: 'Poppins', sans-serif;
}

.input-unit {
    padding: 15px;
    background-color: var(--light-bg);
    color: var(--text-secondary);
    font-weight: 500;
}

.input-hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

/* Exchange Rate Display */
.exchange-rate-display {
    background-color: var(--light-bg);
    padding: 20px;
    border-radius: var(--radius-md);
    margin: 20px 0;
}

.rate-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    font-weight: 500;
}

.conversion-preview {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.deposit-note {
    background-color: var(--light-bg);
    padding: 15px;
    border-radius: var(--radius-md);
    margin-top: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
}

/* Withdraw Page */
.withdraw-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
}

.withdraw-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.payment-methods {
    margin-bottom: 30px;
}

.method-selector {
    display: flex;
    gap: 15px;
    margin-top: 15px;
}

.method-btn {
    flex: 1;
    padding: 15px;
    border: 2px solid var(--border-color);
    background-color: var(--light-bg);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.method-btn.active {
    border-color: var(--primary-color);
    background-color: rgba(79, 70, 229, 0.1);
}

.method-btn img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.input-with-country {
    display: flex;
    align-items: center;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.country-code {
    padding: 15px;
    background-color: var(--light-bg);
    color: var(--text-secondary);
    font-weight: 500;
}

.input-with-country input {
    flex: 1;
    border: none;
    padding: 15px;
    font-size: 1rem;
    font-family: 'Poppins', sans-serif;
}

.balance-info {
    margin-top: 5px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.fee-calculator {
    background-color: var(--light-bg);
    padding: 20px;
    border-radius: var(--radius-md);
    margin: 20px 0;
}

.fee-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.fee-item.total {
    border-bottom: none;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-top: 10px;
    padding-top: 15px;
    border-top: 2px solid var(--border-color);
}

.processing-info {
    background-color: var(--light-bg);
    padding: 15px;
    border-radius: var(--radius-md);
    margin-top: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
}

/* Security Features */
.security-features {
    list-style: none;
    margin-top: 20px;
}

.security-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 10px 0;
    color: var(--text-secondary);
}

.security-features i {
    color: var(--secondary-color);
}

.simulation-notice {
    background-color: var(--light-bg);
    padding: 20px;
    border-radius: var(--radius-md);
    margin-top: 30px;
}

/* Exchange Rates Page */
.rates-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
}

.rates-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.rates-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.last-updated {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.rates-table th,
.rates-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.rates-table th {
    background-color: var(--light-bg);
    font-weight: 600;
    color: var(--text-secondary);
}

.rates-table tr:hover {
    background-color: var(--light-bg);
}

/* Admin Controls */
.admin-controls {
    background-color: var(--light-bg);
    padding: 20px;
    border-radius: var(--radius-md);
    margin-top: 30px;
}

.admin-form {
    margin-top: 20px;
}

.admin-form .form-group {
    margin-bottom: 15px;
}

.admin-form label {
    display: block;
    margin-bottom: 5px;
}

.admin-form input {
    width: 100%;
    padding: 10px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: 'Poppins', sans-serif;
}

.admin-note {
    margin-top: 15px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Rate History */
.rates-history {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.chart-container {
    height: 300px;
    margin: 20px 0;
}

.time-filters {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.time-filter {
    padding: 8px 16px;
    border: 2px solid var(--border-color);
    background-color: var(--light-bg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
}

.time-filter.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background-color: white;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: 30px 30px 10px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.modal-body {
    padding: 30px;
}

.demo-credentials {
    background-color: var(--light-bg);
    padding: 20px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.credential-box {
    background-color: white;
    padding: 15px;
    border-radius: var(--radius-md);
    margin-top: 15px;
    border: 2px solid var(--border-color);
}

.credential-item {
    display: flex;
    justify-content: space-between;
    margin: 8px 0;
}

.demo-features ul {
    list-style: none;
    margin-top: 10px;
}

.demo-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 8px 0;
    color: var(--text-secondary);
}

.demo-features i {
    color: var(--secondary-color);
}

.modal-actions {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 30px;
}

/* Notification System */
.notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.notification {
    background-color: white;
    padding: 15px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 15px;
    min-width: 300px;
    animation: slideIn 0.3s ease;
    border-left: 4px solid var(--primary-color);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.notification.success {
    border-left-color: var(--secondary-color);
}

.notification.error {
    border-left-color: var(--danger-color);
}

.notification.warning {
    border-left-color: var(--warning-color);
}

.notification i {
    font-size: 1.2rem;
}

/* Footer */
.footer {
    background-color: var(--dark-bg);
    color: white;
    padding: 40px 20px 20px;
    margin-top: 60px;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.footer-section h3 {
    margin-bottom: 20px;
    color: white;
}

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

.footer-section li {
    margin: 10px 0;
}

.footer-section a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.disclaimer {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    display: flex;
    align-items: start;
    gap: 10px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    margin-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .deposit-container,
    .withdraw-container,
    .rates-container {
        grid-template-columns: 1fr;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-actions {
        grid-column: span 1;
    }
    
    .transactions-section {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        height: auto;
        padding: 15px;
    }
    
    .nav-menu {
        margin: 20px 0;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-user {
        width: 100%;
        justify-content: center;
    }
    
    .hero-stats {
        flex-direction: column;
        align-items: center;
    }
    
    .stat-card {
        width: 100%;
        max-width: 300px;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .method-selector {
        flex-direction: column;
    }
}

/* Additional Utility Classes */
.hidden {
    display: none !important;
}

.warning-box {
    background-color: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--warning-color);
    padding: 15px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: start;
    gap: 10px;
    margin-top: 20px;
}

.info-steps {
    list-style-type: decimal;
    padding-left: 20px;
    margin: 15px 0;
}

.info-steps li {
    margin: 10px 0;
    padding-left: 10px;
}