:root {
        --primary: #667eea;
        --secondary: #764ba2;
        --success: #2ecc71;
        --danger: #e74c3c;
        --warning: #f39c12;
        --dark: #2d3748;
        --light: #f7fafc;
        --white: #FFFFFF;
        --gray: #718096;
        --border: #e2e8f0;
        --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        --radius: 8px;
    }
    
    .page-header {
        text-align: center;
        margin: 3rem 0;
    }
    
    .page-header h1 {
        font-size: 2.5rem;
        font-weight: 700;
        color: var(--dark);
        margin-bottom: 1rem;
    }
    
    .page-header p {
        font-size: 1.1rem;
        color: var(--gray);
        max-width: 600px;
        margin: 0 auto;
    }
    
    .dashboard-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .dashboard-card {
        background: var(--white);
        padding: 1.5rem;
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        transition: transform 0.2s;
    }
    
    .dashboard-card:hover {
        transform: translateY(-5px);
    }
    
    .card-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 1rem;
    }
    
    .card-title {
        font-size: 1.2rem;
        font-weight: 600;
        color: var(--dark);
    }
    
    .card-icon {
        font-size: 2rem;
    }
    
    .card-value {
        font-size: 2rem;
        font-weight: 700;
        color: var(--primary);
        margin: 0.5rem 0;
    }
    
    .card-change {
        font-size: 0.9rem;
        color: var(--success);
    }
    
    .card-action {
        margin-top: 1rem;
        display: flex;
        gap: 0.5rem;
    }
    
    .btn-small {
        display: inline-block;
        background: var(--light);
        color: var(--primary);
        padding: 0.5rem 1rem;
        border-radius: var(--radius);
        text-decoration: none;
        font-weight: 500;
        transition: all 0.2s;
        border: none;
        cursor: pointer;
    }
    
    .btn-small:hover {
        background: var(--primary);
        color: var(--white);
    }
    
    /* Styles pour les dépôts en attente */
    .pending-deposits {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }
    
    .pending-deposit-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1rem;
        background: var(--light);
        border-radius: var(--radius);
        border-left: 4px solid var(--warning);
    }
    
    .deposit-info {
        display: flex;
        flex-direction: column;
    }
    
    .deposit-amount {
        font-weight: 600;
        font-size: 1.1rem;
        color: var(--dark);
    }
    
    .deposit-date {
        font-size: 0.9rem;
        color: var(--gray);
    }
    
    .deposit-status {
        background: rgba(243, 156, 18, 0.1);
        color: var(--warning);
        padding: 0.4rem 0.8rem;
        border-radius: 4px;
        font-weight: 600;
        font-size: 0.9rem;
    }
    
    .referral-section {
        background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
        color: white;
        padding: 2rem;
        border-radius: var(--radius);
        margin-bottom: 2rem;
        text-align: center;
    }
    
    .referral-section h2 {
        font-size: 1.8rem;
        margin-bottom: 1rem;
    }
    
    .referral-section p {
        max-width: 600px;
        margin: 0 auto 1.5rem;
        opacity: 0.9;
    }
    
    .referral-code {
        background: rgba(255,255,255,0.2);
        padding: 1rem;
        border-radius: var(--radius);
        text-align: center;
        margin: 1rem 0;
        font-size: 1.5rem;
        font-weight: 700;
        letter-spacing: 2px;
    }
    
    .referral-actions {
        display: flex;
        justify-content: center;
        gap: 1rem;
        margin-bottom: 1.5rem;
    }
    
    .btn-copy, .btn-share {
        background: rgba(255,255,255,0.2);
        border: 1px solid rgba(255,255,255,0.3);
        color: white;
        padding: 0.75rem 1.5rem;
        border-radius: var(--radius);
        cursor: pointer;
        transition: all 0.3s;
        font-weight: 600;
    }
    
    .btn-copy:hover, .btn-share:hover {
        background: rgba(255,255,255,0.3);
    }
    
    .referral-stats {
        display: flex;
        justify-content: space-around;
        margin-top: 1.5rem;
    }
    
    .stat-item {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .stat-number {
        font-size: 1.5rem;
        font-weight: 700;
        margin-bottom: 0.5rem;
    }
    
    .stat-label {
        font-size: 0.9rem;
        opacity: 0.8;
    }
    
    .crypto-list {
        background: var(--white);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        overflow: hidden;
        margin-bottom: 2rem;
    }
    
    .crypto-list-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1.5rem;
        border-bottom: 1px solid var(--border);
    }
    
    .crypto-list-header h3 {
        font-size: 1.3rem;
        color: var(--dark);
        margin: 0;
    }
    
    .transactions-history {
        padding: 1rem;
    }
    
    .transactions-history h4 {
        margin-bottom: 1rem;
        color: var(--dark);
    }
    
    .transactions-table {
        width: 100%;
        border-collapse: collapse;
    }
    
    .transactions-table th, .transactions-table td {
        padding: 0.75rem;
        text-align: left;
        border-bottom: 1px solid var(--border);
    }
    
    .transactions-table th {
        font-weight: 600;
        color: var(--gray);
    }
    
    .transaction-type {
        display: inline-block;
        padding: 0.25rem 0.5rem;
        border-radius: 4px;
        font-size: 0.8rem;
        font-weight: 600;
    }
    
    .transaction-type.buy {
        background: rgba(46, 204, 113, 0.1);
        color: var(--success);
    }
    
    .transaction-type.sell {
        background: rgba(231, 76, 60, 0.1);
        color: var(--danger);
    }
    
    .transaction-status {
        display: inline-block;
        padding: 0.25rem 0.5rem;
        border-radius: 4px;
        font-size: 0.8rem;
        font-weight: 600;
    }
    
    .transaction-status.completed {
        background: rgba(46, 204, 113, 0.1);
        color: var(--success);
    }
    
    .view-all {
        margin-top: 1rem;
        text-align: right;
    }
    
    .btn-secondary {
        background: var(--light);
        color: var(--primary);
        padding: 0.5rem 1rem;
        border-radius: var(--radius);
        text-decoration: none;
        font-weight: 500;
        transition: all 0.2s;
        display: inline-block;
    }
    
    .btn-secondary:hover {
        background: var(--primary);
        color: var(--white);
    }
    
    .empty-state {
        text-align: center;
        padding: 3rem 1.5rem;
    }
    
    .empty-icon {
        font-size: 3rem;
        margin-bottom: 1rem;
    }
    
    .empty-state h4 {
        font-size: 1.3rem;
        color: var(--dark);
        margin-bottom: 0.5rem;
    }
    
    .empty-state p {
        color: var(--gray);
        margin-bottom: 1.5rem;
    }
    
    .next-steps {
        margin-bottom: 2rem;
    }
    
    .next-steps h2 {
        font-size: 1.8rem;
        color: var(--dark);
        margin-bottom: 1.5rem;
        text-align: center;
    }
    
    .steps-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 1.5rem;
    }
    
    .step-card {
        background: var(--white);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        padding: 1.5rem;
        display: flex;
        gap: 1rem;
        transition: transform 0.2s;
    }
    
    .step-card:hover {
        transform: translateY(-5px);
    }
    
    .step-number {
        width: 40px;
        height: 40px;
        background: var(--primary);
        color: white;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 700;
        font-size: 1.2rem;
        flex-shrink: 0;
    }
    
    .step-content h3 {
        font-size: 1.2rem;
        color: var(--dark);
        margin-bottom: 0.5rem;
    }
    
    .step-content p {
        color: var(--gray);
        margin-bottom: 1rem;
    }
    
    .btn-primary {
        background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
        color: var(--white);
        border: none;
        padding: 0.75rem 1.5rem;
        border-radius: var(--radius);
        font-size: 1rem;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s ease;
        text-decoration: none;
        display: inline-block;
    }
    
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
    }
    
    /* Responsive */
    @media (max-width: 768px) {
        .page-header h1 {
            font-size: 2rem;
        }
        
        .dashboard-grid {
            grid-template-columns: 1fr;
        }
        
        .referral-stats {
            flex-direction: column;
            gap: 1rem;
        }
        
        .steps-grid {
            grid-template-columns: 1fr;
        }
        
        .transactions-table {
            font-size: 0.9rem;
        }
        
        .transactions-table th, .transactions-table td {
            padding: 0.5rem;
        }
        
        .card-action {
            flex-direction: column;
        }
    }