.app-header {
        position: sticky;
        top: 0;
        z-index: 48;
        /* background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%); */
        color: white;
        padding: 5px 20px 12px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }
    .header-content {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    .app-brand {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .app-logo {
        width: 50px;
        height: 40px;
        border-radius: 10px;
        /* background: rgba(255, 255, 255, 0.2); */
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
    }

    .app-title {
        font-size: 16px;
        font-weight: bold;
    }

    .app-subtitle {
        font-size: 10px;
        opacity: 0.8;
    }

    .header-actions {
        display: flex;
        gap: 12px;
    }

    .header-action-btn {
        width: 36px;
        height: 36px;
        border-radius: 10px;
        background: rgba(255, 255, 255, 0.15);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        transition: all 0.3s ease;
    }

    .header-action-btn:hover {
        background: rgba(255, 255, 255, 0.25);
    }